WO2019098189A1 - Communication device, slave device, communication system, and program - Google Patents

Communication device, slave device, communication system, and program Download PDF

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Publication number
WO2019098189A1
WO2019098189A1 PCT/JP2018/041973 JP2018041973W WO2019098189A1 WO 2019098189 A1 WO2019098189 A1 WO 2019098189A1 JP 2018041973 W JP2018041973 W JP 2018041973W WO 2019098189 A1 WO2019098189 A1 WO 2019098189A1
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WIPO (PCT)
Prior art keywords
unit
detection
signal
communication
control unit
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PCT/JP2018/041973
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French (fr)
Japanese (ja)
Inventor
工藤　弘行
中村　将之
Original Assignee
パナソニックＩｐマネジメント株式会社
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Publication of WO2019098189A1 publication Critical patent/WO2019098189A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/06—Speed or phase control by synchronisation signals the synchronisation signals differing from the information signals in amplitude, polarity or frequency or length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Definitions

  • the present disclosure relates generally to communication devices, slaves, communication systems, and programs, and more particularly to communication devices, slaves, communication systems, and programs that transmit synchronization signals.
  • a load control system in which an image sensor (communication device) and a transmission control device are connected by a two-wire signal line is disclosed (for example, see Patent Document 1).
  • the load control system described in Patent Document 1 includes an image sensor, a display terminal, and a transmission control device.
  • the image sensor captures a space of a detection target, and detects the presence or absence of a person in a detection area set in advance among the captured images.
  • the display terminal has a display unit that displays a detection area.
  • the image sensor and the display terminal are connected via a two-wire signal line.
  • the image sensor is configured to transmit a transmission signal including area data indicating a detection area to the transmission control device via the signal line. Further, the transmission control device is configured to transmit a transmission signal including the area data transmitted from the image sensor and the address data matching the address of the display terminal to the display terminal via the signal line.
  • the display terminal is configured to display the detection area on the display unit based on the area data.
  • the transmission control device is configured to transmit a transmission signal including address data to and from the image sensor via the signal line.
  • the transmission signal comprises a start pulse signal, mode data, address data, control data, checksum data, and a signal return period. Therefore, in the load control system described in Patent Document 1, there is a possibility that the signal becomes complicated.
  • the present disclosure has been made in view of the above, and an object thereof is to provide a communication device, a slave, a communication system, and a program capable of achieving simplification of a signal.
  • a communication apparatus includes a communication unit and a control unit.
  • the communication unit transmits a synchronization signal to the slave unit.
  • the control unit controls the communication unit.
  • the synchronization signal is a signal for synchronizing the communication device and the slave, and the signal level is periodically switched between at least two values.
  • the control unit performs at least one of a cycle in which the signal level of the synchronization signal is switched between the two values and a duty that is a ratio of a period in which the signal level is one of the two values in the cycle. , Modulate according to the information to be transmitted to the child device.
  • the slave receives the synchronization signal from the communication device.
  • a communication system includes the communication device and the slave.
  • a program according to an aspect of the present disclosure causes a computer system to function as the control unit of the communication device.
  • FIG. 1 is a block diagram of a communication system according to an embodiment of the present disclosure.
  • FIG. 2A is a block diagram of a master provided in the communication system of the same.
  • FIG. 2B is a block diagram of a slave provided in the communication system.
  • FIG. 3 is a diagram showing an example of use of the above communication system.
  • FIG. 4 is a timing chart showing a first operation example of the communication system of the above.
  • FIG. 5 is a flow chart showing a first operation example of the above communication system.
  • FIG. 6 is a timing chart showing a second operation example of the communication system of the above.
  • FIG. 7 is another timing chart showing a second operation example of the communication system same as the above.
  • FIG. 8 is another timing chart showing a second operation example of the communication system same as the above.
  • FIG. 1 is a block diagram of a communication system according to an embodiment of the present disclosure.
  • FIG. 2A is a block diagram of a master provided in the communication system of the same.
  • FIG. 9 is a timing chart showing a third operation example of the communication system of the same as the above.
  • FIG. 10A is a block diagram for explaining a fourth operation example of the communication system same as the above.
  • FIG. 10B is a timing chart showing a fourth operation example of the communication system of the same.
  • FIG. 11 is a timing chart showing an operation example of the communication system according to the modification of the embodiment.
  • FIG. 1 shows a block diagram of a communication system 30 of the present embodiment.
  • the communication system 30 of the present embodiment includes a plurality of communication terminals 3 that can communicate with each other.
  • the plurality of communication terminals 3 include one master 1 (communication device) and a plurality of (three in FIG. 1) slaves 2.
  • the master unit 1 and the slave unit 2 are not distinguished from one another, they are referred to as the communication terminal 3.
  • the handset 2A, the handset 2B, and the handset 2C are used.
  • the number of handsets 2 is not limited to three, and may be one, or two or four or more.
  • the base unit 1 and the plurality of handsets 2 are electrically connected by a pair of electric wires 41 and 42.
  • the plurality of handsets 2 are wired (multi-drop wiring) to the master 1 via the pair of electric wires 41 and 42.
  • the base unit 1 supplies power to each of the plurality of handsets 2 via the pair of electric wires 41 and 42.
  • the plurality of handsets 2 are electrically connected by a pair of electric wires 41 and 42 by, for example, feed wiring.
  • Each of the master unit 1 and the plurality of handsets 2 transmits a signal to the other communication terminal 3 by reducing the voltage between the pair of electric wires 41 and 42.
  • Each of the master unit 1 and the plurality of handsets 2 receives a signal from another communication terminal 3 by monitoring the voltage between the pair of electric wires 41 and 42. That is, the master unit 1 and the slave unit 2 can perform two-way communication via the pair of electric wires 41 and 42.
  • the communication system 30 of the present embodiment has a function as a lighting control system that controls the lighting system 80.
  • Each communication terminal 3 has a function as a moving body detection device that detects the presence of a moving body in the detection range.
  • a person 9 is assumed as a moving object which is a detection target (see FIG. 3). That is, each communication terminal 3 has a function as a human detection device.
  • Each communication terminal 3 detects the presence of the person 9 in a detection range set in, for example, a house, an office, a store, a school, a hospital or the like.
  • each communication terminal 3 particularly detects the change in the light reception intensity of the infrared light to detect the presence of the detection target (person 9) that emits the infrared light.
  • the detection target person 9 that emits the infrared light.
  • FIG. 3 only one master unit 1 and one slave unit 2 are illustrated, and the other slave units 2 are omitted.
  • the child device 2 detects the presence of the person 9 based on the change in the intensity of the infrared light from the detection range 92. That is, the child device 2 moves the person 9 from the outside of the detection range 92 into the detection range 92 or changes in the light reception intensity of infrared light caused by the slight movement of the person 9 in the detection range 92.
  • “micromotion” means, for example, movement of the person 9 without movement, such as shaking of the body due to the breathing of the person 9 and gestures.
  • the slave 2 Upon detecting the presence of the person 9 in the detection range 92, the slave 2 outputs a person detection signal to the other communication terminal 3 via the pair of electric wires 41 and 42. The slave unit 2 stops the output of the human detection signal when it does not detect the presence of the person 9 in the detection range 92.
  • the parent device 1 detects the presence of the person 9 based on the intensity change of the infrared light from the detection range 91. That is, the base unit 1 detects the presence of the person 9 from the change of the light reception intensity of the infrared light caused by the movement of the person 9 from outside the detection range 91 into the detection range 91 or the slight movement of the person 9 in the detection range 91. Detection
  • the detection range 92 of the slave 2 and the detection range 91 of the master 1 may be the same, may partially overlap, or may not overlap at all. In the example of FIG. 3, the detection range 92 of the slave 2 and the detection range 91 of the master 1 partially overlap.
  • a space including the detection ranges 91 and 92 is referred to as a detection space 90.
  • the base unit 1 determines whether the state of the detection space 90 is the presence state or the absence state from the presence or absence of the human detection signal from the slave unit 2 and the human detection result of the base unit 1 itself.
  • the “presence state” mentioned here is a state in which the person 9 is present in the detection space 90.
  • the “absent state” is a state in which the person 9 does not exist in the detection space 90.
  • the parent device 1 has a function of controlling the operating state of the lighting system 80.
  • the base unit 1 controls the operation state of the illumination system 80 according to the determination result of the state of the detection space 90 (either the existing state or the absent state).
  • base station 1 controls the operation state of the illumination system 80 by notifying the determination result of the state of the detection space 90 to the illumination system 80.
  • the lighting system 80 includes a lighting fixture 81 that illuminates the detection space 90 and a controller 82 that controls the lighting fixture 81. If the determination result notified from the parent device 1 is the "presence state”, the control device 82 turns on the lighting device 81. On the other hand, if the determination result notified from the parent device 1 is “absent state”, the control device 82 turns off the lighting device 81.
  • the control device 82 includes, for example, a switch that is inserted in the power feeding path to the lighting fixture 81 and turns on / off the lighting of the lighting fixture 81. That is, according to the determination result of the main
  • the master unit 1 has a light receiving unit 11, a master unit control unit 12 (control unit), a master unit power supply unit 13 (power supply unit), and a master unit communication unit 14 (communication unit). And an output unit 15.
  • the parent device side power supply unit 13 is, for example, an AC / DC converter having a full wave rectification circuit and a switching power supply circuit.
  • the parent device side power supply unit 13 converts the AC voltage supplied from the AC power supply 6 into a DC voltage of a first voltage value V1 (first signal level), and outputs the DC voltage between the pair of electric wires 41 and 42.
  • the first voltage value V1 is 15 V, for example.
  • the base unit side power supply unit 13 generates power for operating the base unit 1 from the AC power output from the AC power supply 6.
  • the AC power supply 6 is, for example, a commercial power supply.
  • the parent device side power supply unit 13 is not limited to the AC / DC converter, and may be a battery.
  • the base unit side communication unit 14 is electrically connected to the pair of electric wires 41 and 42, and includes a transmission unit 141 and a reception unit 142.
  • the transmission unit 141 transmits a voltage signal to the other communication terminal 3 (the handset 2) by reducing the voltage between the pair of electric wires 41 and 42.
  • the transmission unit 141 includes Zener diodes ZD11 and ZD12, and switches SW11 and SW12.
  • the zener diode ZD11 and the switch SW11 are electrically connected in series between the pair of electric wires 41 and 42.
  • the zener diode ZD12 and the switch SW12 are electrically connected in series between the pair of electric wires 41 and 42.
  • the voltage value of the Zener voltage (breakdown voltage) of the Zener diode ZD11 is a second voltage value V2 (second signal level).
  • the second voltage value V2 is a value lower than the voltage value (first voltage value V1) of the DC voltage output from the parent device side power supply unit 13.
  • the second voltage value V2 is 12 V, for example.
  • the voltage value of the Zener voltage (breakdown voltage) of the Zener diode ZD12 is a third voltage value V3.
  • the third voltage value V3 is lower than the voltage value (first voltage value V1) of the DC voltage output from the parent device side power supply unit 13 and the voltage value (second voltage value V2) of the Zener voltage of the Zener diode ZD12. It is.
  • the third voltage value V3 is 7 V, for example.
  • the switches SW11 and SW12 are semiconductor switches such as, for example, MOSFETs (Metal Oxide Semiconductor Field Effect Transistors).
  • MOSFETs Metal Oxide Semiconductor Field Effect Transistors
  • the switches SW11 and SW12 are controlled to be turned on / off by the transmission control unit 121 of the master device control unit 12.
  • the transmission unit 141 transmits a voltage signal by changing (step-down) the voltage between the pair of electric wires 41 and 42 by turning on / off the switches SW11 and SW12.
  • the voltage signal transmitted from the master unit 1 to the other communication terminal 3 (the slave unit 2) has three signal levels (a first voltage value V1, a second voltage value V2, a third voltage value V3) (pair of electric wires 41). , 42) is set.
  • the receiving unit 142 receives the voltage signal from the other communication terminal 3 (the handset 2) by detecting the voltage between the pair of electric wires 41 and 42.
  • the receiving unit 142 includes a plurality of (two in FIG. 2) resistors R11 and R12.
  • the resistor R11 and the resistor R12 are electrically connected in series between the pair of electric wires 41 and 42.
  • the receiving unit 142 outputs a value obtained by dividing the voltage between the pair of electric wires 41 and 42 by the resistors R11 and R12 to the reception control unit 122 of the parent device control unit 12.
  • the light receiving unit 11 includes a light receiving element 111 and a processing circuit 112.
  • the light receiving element 111 is a pyroelectric element (infrared light receiving element).
  • the light receiving element 111 outputs a signal (electric signal) according to the change in the light receiving intensity of the infrared light from the detection range 91.
  • the processing circuit 112 is a circuit that performs signal processing of the electrical signal output from the light receiving element 111.
  • the processing circuit 112 converts the current signal output from the light receiving element 111 into a voltage signal, amplifies the voltage signal, and amplifies the amplified analog signal (voltage signal).
  • the light receiving unit 11 is used in combination with the optical system 16 (see FIG. 3).
  • the optical system 16 is composed of a lens or a mirror, or a combination of these, and condenses infrared light from the detection range 91 on the light receiving element 111.
  • the light receiving unit 11 is housed in one housing 17 (see FIG. 3) together with the base unit power supply unit 13, the base unit communication unit 14, the base unit control unit 12, and the like.
  • the main unit 1 including the light receiving unit 11 is installed on a ceiling of a living room of a house, and receives infrared light from a detection range 91 set in the living room.
  • the parent device control unit 12 includes a transmission control unit 121, a reception control unit 122, a detection unit 123, and a determination unit 124.
  • the main control unit 12 mainly includes a computer such as a microcomputer.
  • the parent device control unit 12 implements the functions of the above-described units by executing the program recorded in the memory of the microcomputer by the processor of the microcomputer.
  • the program may be pre-recorded in a memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a recording medium such as a memory card.
  • the transmission control unit 121 controls the on / off of the switches SW11 and SW12 of the transmission unit 141 to transmit a voltage signal from the base-unit communication unit 14 to the other communication terminal 3 (child unit 2).
  • the transmission control unit 121 individually controls on / off of the switches SW11 and SW12 by individually outputting a control signal for turning on / off the switches SW11 and SW12.
  • the voltage signal that the base unit side communication unit 14 transmits to the other communication terminal 3 (the handset 2) will be described in detail in the section of “(3) Operation example” described later.
  • the reception control unit 122 detects the voltage value of the voltage between the pair of electric wires 41 and 42 by acquiring the resistance division value of the voltage between the pair of electric wires 41 and 42 by the reception unit 142 in a predetermined sampling cycle. ing. Similar to the parent device 1, the child device 2 is configured to transmit a voltage signal that changes (steps down) the voltage between the pair of electric wires 41 and 42. The reception control unit 122 receives a voltage signal from the handset 2 by detecting a change in voltage value between the pair of electric wires 41 and 42. The reception control unit 122 receives the voltage signal from the child device 2 to receive the detection result of the person 9 in the detection range 92 by the child device 2.
  • the detection unit 123 determines whether or not the person 9 is present in the detection range 91 based on the output signal S1 from the light receiving unit 11 (processing circuit 112).
  • the operation mode of the detection unit 123 includes an approach detection mode and a stay detection mode.
  • the entry detection mode is an operation mode for detecting entry of the person 9 into the detection range 91.
  • the detection unit 123 operates in the entry detection mode when the person 9 is not present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is turned off.
  • the stay detection mode is an operation mode for detecting the leaving of the person 9 from the detection range 91.
  • the detection unit 123 operates in the stay detection mode when the person 9 is present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is on.
  • the detection unit 123 compares the amplitude A1 of the output signal S1 with the first detection threshold Vth11 (see FIG. 9). If the amplitude A1 of the output signal S1 is equal to or greater than the first detection threshold Vth11, the detection unit 123 determines that the person 9 has entered the detection range 91 (the person 9 is present in the detection range 91). Then, the detection unit 123 notifies the determination unit 124 of the detection result.
  • the transmission control unit 121 causes the transmission unit 141 to transmit an entry detection signal when the detection unit 123 detects the presence of the person 9 in the entry detection mode. In addition, when at least one of the plurality of communication terminals 3 (the base unit 1 and the handset 2) detects the entry of the person 9 into the corresponding detection range, the detection unit 123 stays in the operation mode from the entry detection mode. Switch to detection mode.
  • the detection unit 123 compares the amplitude A1 of the output signal S1 with the second detection threshold Vth12. The detection unit 123 determines whether the duration of the state in which the amplitude A1 of the output signal S1 is lower than the second detection threshold Vth12 exceeds the stay determination time. When the duration of the state in which the amplitude A1 of the output signal S1 is lower than the second detection threshold Vth12 exceeds the stay determination time, the detection unit 123 has left the person 9 from the detection range 91 (the detection range 91 corresponds to the person 9). Is determined to be absent).
  • the detection unit 123 detects that the person 9 stays in the detection range 91 during the stay determination time after the amplitude A1 of the output signal S1 lastly exceeds the second detection threshold Vth12 (a person in the detection range 91 It is determined that 9 exists.
  • the count value of the stay determination time is reset each time the amplitude A1 of the output signal S1 exceeds the second detection threshold Vth12.
  • the value of the stay determination time is variable, and is set by the user to, for example, one minute, three minutes, five minutes, ten minutes, or the like. Then, the detection unit 123 notifies the determination unit 124 of the detection result.
  • the transmission control unit 121 causes the transmission unit 141 to transmit a stay detection signal during the stay determination time.
  • the detection unit 123 determines that all of the plurality of communication terminals 3 (the base unit 1 and the handset 2) are absent in the corresponding detection range, the operation mode is detected as an entry from the stay detection mode. Switch to mode.
  • the numerical value of said stay determination time is an example, Comprising: It does not restrict to said numerical value.
  • the first detection threshold Vth11 and the second detection threshold Vth12 have the same value, but may have different values.
  • the determination unit 124 determines the state of the detection space 90 (the space including the detection ranges 91 and 92) based on the detection result from the detection unit 123 and the detection results of the person 9 by the plurality of handsets 2 To determine if it is or not.
  • the determination unit 124 determines that the state of the detection space 90 is in the existing state during a predetermined entry determination time. Do.
  • the entry determination time is variable, for example, between 1 minute and 30 minutes, and is set by the user.
  • the determination unit 124 determines that the state of the detection space 90 is the absence state, judge. That is, the determination unit 124 determines whether the state of the detection space 90 is the presence state or the absence state from the detection results of the entry / exit of the person 9 in all the plurality of communication terminals 3. The determination unit 124 notifies the output unit 15 of the determination result as to whether the detection space 90 is in the presence state or in the absence state.
  • the output unit 15 is a communication interface capable of transmitting a signal to the control device 82 of the lighting system 80.
  • the output unit 15 outputs the determination result of the determination unit 124 to the control device 82. Specifically, the output unit 15 outputs a determination signal indicating the determination result of the determination unit 124 to the control device 82.
  • the output unit 15 outputs a determination signal indicating “an absent state”.
  • the output unit 15 outputs a determination signal indicating the “presence state”.
  • the output unit 15 serially outputs, for example, a determination signal indicating the determination result of the determination unit 124 to the control device 82. Specifically, the output unit 15 outputs a determination signal including the start bit, the determination result, and the stop bit.
  • the control device 82 is configured to control the lighting / extinguishing of the lighting fixture 81 based on the determination signal from the parent device 1.
  • the controller 82 mainly includes a computer such as a microcomputer.
  • the control device 82 implements the following various functions by executing the program stored in the memory of the microcomputer by the processor of the microcomputer.
  • the program may be pre-recorded in a memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a recording medium such as a memory card.
  • control device 82 When the control device 82 receives the determination signal indicating the detection result of the “absent state” from the parent device 1, the control device 82 determines that the state of the detection space 90 is the “absent state”, and turns off the lighting fixture 81. On the other hand, when the control device 82 receives a determination signal indicating the detection result of the "presence state” from the parent device 1, the control device 82 determines that the state of the detection space 90 is the “presence state”, and turns on the lighting fixture 81.
  • the slave unit 2 includes the light receiving unit 21, the slave unit-side control unit 22, the diode bridge (DB) 23, the slave unit-side power supply unit 24, and the slave unit-side communication unit 25. Have.
  • the diode bridge 23 is a full bridge circuit including a plurality of diodes.
  • the diode bridge 23 has an input end electrically connected to the pair of electric wires 41 and 42, and an output end electrically connected to the slave unit side power supply unit 24 and the slave unit side communication unit 25.
  • the slave unit side power supply unit 24 is, for example, a DC / DC converter.
  • the slave unit-side power supply unit 24 generates power for operating the slave unit 2 from the DC power supplied from the master unit-side power supply unit 13 of the master unit 1 via the pair of electric wires 41 and 42.
  • the slave unit side communication unit 25 is electrically connected to the pair of electric wires 41 and 42 via the diode bridge 23, and includes a transmission unit 251 and a reception unit 252.
  • the transmitting unit 251 reduces the voltage between the pair of electric wires 41 and 42 to transmit a voltage signal to the other communication terminal 3 (master unit 1 and slave unit 2).
  • the transmission unit 251 includes a Zener diode ZD21 and a switch SW21.
  • the zener diode ZD21 and the switch SW21 are electrically connected in series between the pair of electric wires 41 and 42.
  • a series circuit of the Zener diode ZD21 and the switch SW21 is electrically connected between a pair of output terminals of the diode bridge 23.
  • the voltage value of the Zener voltage (breakdown voltage) of the Zener diode ZD21 is a third voltage value V3. That is, the voltage value of the Zener voltage of the Zener diode ZD21 is the same as the voltage value (third voltage value V3) of the Zener voltage of the Zener diode ZD12 of the transmission unit 141 in the parent device 1.
  • the same as mentioned here includes not only the perfect match of the voltage value of the Zener voltage but also the case where the error is within the allowable range.
  • the switch SW21 is, for example, a semiconductor switch such as a MOSFET.
  • the on / off of the switch SW21 is controlled by the transmission control unit 221 of the slave unit control unit 22.
  • the transmission unit 251 transmits a voltage signal that changes (steps down) the voltage between the pair of electric wires 41 and 42 by turning on / off the switch SW21.
  • the voltage signal that handset 2 transmits to the other communication terminal 3 (master 1, handset 2) has two levels (first voltage value V1, third voltage value V3) signal levels (pair of electric wires 41, 42). Voltage value) is set.
  • the receiving unit 252 receives the voltage signal from the other communication terminal 3 (the base unit 1 and the handset 2) by detecting the voltage between the pair of electric wires 41 and 42.
  • the receiving unit 252 includes a plurality of (two in FIG. 2) resistors R21 and R22. Between a pair of electric wires 41 and 42, resistance R21 and resistance R22 are electrically connected in series.
  • the receiving unit 252 outputs a value obtained by dividing the voltage between the pair of electric wires 41 and 42 by the resistors R21 and R22 to the reception control unit 222 of the slave control unit 22.
  • the light receiving unit 21 includes a light receiving element 211 and a processing circuit 212.
  • the light receiving element 211 is a pyroelectric element (infrared light receiving element).
  • the light receiving element 211 outputs a signal (electric signal) according to the change in the light receiving intensity of the infrared light from the detection range 92.
  • the processing circuit 212 is a circuit that performs signal processing of the electrical signal output from the light receiving element 211.
  • the processing circuit 212 converts the current signal output from the light receiving element 211 into a voltage signal, amplifies the voltage signal, and amplifies the amplified analog signal (voltage signal).
  • the light receiving unit 21 is used in combination with the optical system 26 (see FIG. 3).
  • the optical system 26 is made of a lens or a mirror, or a combination of these, and condenses infrared light from the detection range 92 onto the light receiving element 211.
  • the light receiving unit 21 is housed in one casing 27 (see FIG. 3) together with the slave unit side power supply unit 24, the slave unit side communication unit 25, the slave unit side control unit 22 and the like.
  • the handset 2 provided with the light receiving unit 21 is installed on a ceiling of a living room of a house, and receives infrared light from a detection range 92 set in the living room.
  • the slave unit control unit 22 includes a transmission control unit 221, a reception control unit 222, and a detection unit 223.
  • the slave unit control unit 22 mainly includes a computer such as a microcomputer.
  • the slave unit control unit 22 implements the functions of the above-described units by executing the program stored in the memory of the microcomputer by the processor of the microcomputer.
  • the program may be pre-recorded in a memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a recording medium such as a memory card.
  • the transmission control unit 221 controls the on / off of the switch SW 21 of the transmission unit 251 to transmit a voltage signal from the handset communication unit 25 to the other communication terminal 3 (master unit 1, handset 2).
  • the transmission control unit 221 controls the on / off of the switch SW ⁇ b> 21 by outputting a control signal to turn on / off the switch SW ⁇ b> 21.
  • the voltage signals that the handset communication unit 25 transmits to the other communication terminals 3 (the base unit 1 and handset 2) will be described in detail in the section "(3) Operation example" described later.
  • the reception control unit 222 detects the voltage value of the voltage between the pair of electric wires 41 and 42 by acquiring the resistance division value of the voltage between the pair of electric wires 41 and 42 by the reception unit 252 at a predetermined sampling cycle. ing. As described above, each communication terminal 3 (the base unit 1 and the handset 2) is configured to transmit a voltage signal that changes (steps down) the voltage between the pair of electric wires 41 and 42. The reception control unit 222 receives a voltage signal from another communication terminal 3 (the base unit 1 and the handset 2) by detecting a change in voltage value between the pair of electric wires 41 and 42.
  • the detection unit 223 determines whether or not the person 9 is present in the detection range 92 based on the output signal S2 from the light receiving unit 21 (processing circuit 212).
  • the operation mode of the detection unit 223 includes an approach detection mode and a stay detection mode.
  • the entry detection mode is an operation mode for detecting the entry of the person 9 into the detection range 92.
  • the detection unit 223 operates in the entry detection mode when the person 9 is not present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is turned off.
  • the stay detection mode is an operation mode for detecting the leaving of the person 9 from the detection range 92.
  • the detection unit 223 operates in the stay detection mode when the person 9 is present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is on.
  • the detection unit 223 compares the amplitude A2 of the output signal S2 with the first detection threshold Vth21 (see FIGS. 6 and 7). If the amplitude A2 of the output signal S2 is equal to or greater than the first detection threshold Vth21, the detection unit 223 determines that the person 9 has entered the detection range 92 (the person 9 is present in the detection range 92).
  • the transmission control unit 221 causes the transmission unit 251 to transmit an entrance detection signal when the detection unit 223 detects the presence of the person 9 in the entrance detection mode.
  • the detection unit 223 receives the determination result of the determination unit 124 from the parent device 1 so that at least one of the plurality of communication terminals 3 (the parent device 1 and the child device 2) can receive the person 9 to the corresponding detection range.
  • the operation mode is switched from the approach detection mode to the stay detection mode.
  • the detection unit 223 compares the amplitude A2 of the output signal S2 with the second detection threshold Vth22. The detection unit 223 determines whether or not the duration of the state in which the amplitude A2 of the output signal S2 is less than the second detection threshold Vth22 exceeds the stay determination time.
  • the detection unit 223 withdraws the person 9 from the detection range 92 (the person 9 does not exist in the detection range 92) It is determined that In other words, the detection unit 223 detects that the person 9 stays in the detection range 92 during the stay determination time after the amplitude A2 of the output signal S2 lastly exceeds the second detection threshold Vth22 (a person in the detection range 92 It is determined that 9 exists.
  • the count value of the stay determination time is reset each time the amplitude A2 of the output signal S2 exceeds the second detection threshold Vth22.
  • the value of the stay determination time is variable, and is set to, for example, 1 minute, 3 minutes, 5 minutes, 10 minutes, etc. by the main unit 1.
  • the setting of the stay determination time in the slave unit 2 will be described in the section of “(3) Operation example” described later.
  • the operation mode changes from the stay detection mode to the entry detection mode. Switch.
  • the first detection threshold Vth21 and the second detection threshold Vth22 have the same value, but may have different values. Further, the first detection threshold Vth21 in the slave unit 2 may be the same value as the first detection threshold Vth11 in the master unit 1, or may be a different value. In addition, the second detection threshold Vth22 in the slave unit 2 may be the same value as the second detection threshold Vth12 in the master unit 1, or may be a different value.
  • each communication terminal 3 (master unit 1, slave unit 2) is configured to perform synchronous communication.
  • master device 1 transmits a synchronization signal to slave device 2.
  • the synchronization signal is a signal whose signal level periodically switches between two values. Specifically, in the synchronization signal, the voltage value of the voltage between the pair of electric wires 41 and 42 is a signal level, and the first voltage value V1 (first signal level) and the second voltage value V2 (binary values) And periodically change with the second signal level).
  • the synchronization signal periodically generates a pulse in which the voltage value of the voltage between the pair of electric wires 41 and 42 is the second voltage value V2.
  • the transmission control unit 121 of the parent device 1 changes the voltage value between the pair of electric wires 41 and 42 from the first voltage value V1 to the second voltage value V2 by periodically turning on the switch SW11. That is, the time T2 during which the switch SW11 is on is the pulse width of the synchronization signal. This time T2 is 50 ms, for example.
  • the reception control unit 222 of the slave 2 synchronizes using the change from the first voltage value V1 to the second voltage value V2 as a trigger of the voltage value of the voltage between the pair of electric wires 41 and 42.
  • the transmission control unit 121 modulates the cycle T 1 of the synchronization signal according to the information to be transmitted to the slave 2.
  • the cycle T1 is a cycle in which the voltage value of the voltage between the pair of electric wires 41 and 42 is switched between the first voltage value V1 and the second voltage value V2. That is, the transmission control unit 121 sets the period T1 of the synchronization signal to a time length corresponding to the information to be transmitted to the slave 2.
  • the information transmitted to the slave 2 is setting information and lighting information.
  • the setting information indicates the value (for example, 1 minute, 3 minutes, 5 minutes, 10 minutes, etc.) of the stay determination time set in the handset 2.
  • the lighting information indicates whether the lighting fixture 81 is on or off.
  • a plurality of combinations of setting information (stay determination time) and lighting information (lighting state, extinguishing state) are associated one-to-one with a plurality of time lengths of cycle T1.
  • the plurality of time lengths of the cycle T1 corresponding to the plurality of combinations of setting information and lighting information are different from each other.
  • Data in which a plurality of combinations of setting information and lighting information are associated with a plurality of time lengths of the cycle T1 is stored in the storage unit 120.
  • the storage unit 120 is a semiconductor memory such as a read only memory (ROM) or an electrically erasable programmable read only memory (EEPROM).
  • the transmission control unit 121 determines the time length of the cycle T1 based on the combination of the setting information and the lighting information.
  • the transmission control unit 121 acquires setting information (S11).
  • the setting information is registered (stored) in advance in, for example, the memory of the parent device 1.
  • the registration of setting information in the memory of the parent device 1 is performed by, for example, a setting device connected to the parent device 1 by wire or wirelessly.
  • the transmission control unit 121 accesses the memory, and acquires information (setting information) indicating whether the stay determination time set in the handset 2 is one minute, three minutes, five minutes, or ten minutes, for example.
  • the transmission control unit 121 may be configured to acquire setting information from a dip switch provided in the parent device 1.
  • the transmission control unit 121 acquires lighting information (S12).
  • the transmission control unit 121 acquires lighting information by acquiring the determination result from the determination unit 124.
  • the control device 82 turns off the luminaire 81 if the determination result of the determination unit 124 is "absent state", and turns on the luminaire 81 if the determination result of the determination unit 124 is "presence state” Let That is, the determination result of the determination unit 124 corresponds to the state of the lighting fixture 81.
  • the transmission control unit 121 determines that the lighting fixture 81 is on if the determination result of the determination unit 124 is the "presence state", and if the determination result of the determination unit 124 is the "not present state” It is determined that the light is off.
  • the transmission control unit 121 acquires the determination result of the determination unit 124 to acquire information (lighting information) indicating whether the lighting apparatus 81 is on or off.
  • the transmission control unit 121 may be configured to obtain lighting information from the control device 82.
  • the transmission control unit 121 determines the time length of the cycle T1 of the synchronization signal based on the acquired setting information and lighting information (S13).
  • the transmission control unit 121 accesses the storage unit 120, and acquires data with a time length of period T1 corresponding to the combination of the acquired setting information and lighting information.
  • the transmission control unit 121 causes the transmission unit 141 to transmit the synchronization signal so that the time length of the cycle T1 of the synchronization signal becomes the time length determined (acquired) in step S13 (S14).
  • the transmission control unit 121 reacquires the setting information (S11).
  • the transmission control unit 121 reacquires the lighting information (S12).
  • the transmission control unit 121 continues the transmission of the synchronization signal while maintaining the time length of the cycle T1 (S14).
  • the reception control unit 222 of the slave 2 receives the setting information and the lighting information from the master 1 by measuring the time length of the cycle T1 of the synchronization signal. Specifically, after the voltage value of the voltage between the pair of electric wires 41 and 42 is changed from the first voltage value V1 to the second voltage value V2, the reception control unit 222 then operates between the pair of electric wires 41 and 42 next. The time until the voltage value of the voltage changes from the first voltage value V1 to the second voltage value V2 is measured. Further, similarly to the base unit 1, the handset 2 includes the storage unit 220 that stores data in which a plurality of combinations of setting information and lighting information are associated with a plurality of time lengths of the cycle T1. .
  • the storage unit 220 is, for example, a semiconductor memory such as a read only memory (ROM) or an electrically erasable programmable read only memory (EEPROM).
  • the reception control unit 222 accesses the storage unit 220, and acquires setting information and lighting information corresponding to the measured time length of the cycle T1 of the synchronization signal.
  • the detection unit 223 sets the value of the stay determination time used in the stay detection mode to the value of the stay determination time indicated by the setting information acquired by the reception control unit 222.
  • the detection unit 223 sets the operation mode to stay detection mode, and if the lighting fixture 81 is on, the operation mode is entry detection mode Make it
  • the time length of the cycle T1 of the synchronization signal transmitted by the master unit 1 corresponds to the information transmitted from the master unit 1 to the slave unit 2. Therefore, the signal between the master unit 1 and the slave unit 2 can be simplified.
  • the luminaire 81 is in the extinguishing state and the handset 2A among the plurality of communication terminals 3 (the base unit 1 and the handset 2) detects the presence of the person 9 in the entry detection mode.
  • the transmission control unit 121 of the parent device 1 causes the transmission unit 141 to transmit a synchronization signal in which the time length of the cycle T1 is T11.
  • the time length T11 indicates that the stay determination time T5 (see FIG. 7) which is the setting information is 3 minutes, and the lighting state of the lighting fixture 81 which is the lighting information is in the extinguishing state.
  • the slave unit 2A sets the stay determination time T5 to 3 minutes by measuring the time length T11 of the cycle T1 of the synchronization signal, and sets the operation mode to the entry detection mode.
  • the amplitude A2 of the output signal S2 becomes equal to or greater than the first detection threshold Vth21, and the detection unit 223 of the handset 2A determines that the person 9 has entered the detection range 92 (the person 9 is present in the detection range 92) Do.
  • the detection unit 223 switches the operation mode from the entry detection mode to the stay detection mode by detecting the presence of the person 9 in the entry detection mode.
  • the transmission control unit 221 of the handset 2A causes the transmission unit 251 to transmit an entry detection signal when the detection unit 223 detects the presence of the person 9 in the entry detection mode. Specifically, the transmission control unit 221 transmits an entrance detection signal in one time slot Ts set based on the synchronization signal.
  • the entry detection signal is a pulse signal (voltage signal) in which the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the third voltage value V3.
  • the pulse width T41 of the approach detection signal is a value longer than a predetermined threshold time.
  • the pulse width T41 of the entry detection signal is, for example, 100 ms.
  • the stay detection signal described later is a pulse signal (voltage signal) in which the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the third voltage value V3 as in the case of the entry detection signal.
  • the pulse width T42 of the stay detection signal is a value shorter than a predetermined threshold time.
  • the pulse width T42 of the stay detection signal is, for example, 20 ms.
  • the time slot Ts is a predetermined period starting from time T3 after the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the second voltage value V2 by the synchronization signal.
  • One time slot Ts occurs in one cycle of the synchronization signal.
  • the reception control unit 122 of the base unit 1 receives an approach detection signal and a stay detection signal in the time slot Ts. Specifically, when the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the third voltage value V3 in the time slot Ts, the reception control unit 122 performs the pair of electric wires 41, The time when the voltage value of the voltage between 42 is the third voltage value V3 is measured.
  • the reception control unit 122 determines that the data signal transmitted from the handset 2 is an entry detection signal. Further, when the measured time is shorter than the threshold time, the reception control unit 122 determines that the data signal transmitted from the handset 2 is a stay detection signal.
  • the transmission control unit 221 of the slave unit 2A performs transmission by turning on the switch SW21 for a time T41 from the start point of the time slot Ts in the time slot Ts after the detection unit 223 detects the presence of the person 9 in the entry detection mode.
  • An entry detection signal is transmitted from the unit 251.
  • the determination unit 124 of the base unit 1 determines that the state of the detection space 90 is in the existing state during a predetermined entry determination time.
  • the determination unit 124 outputs the determination result to the control device 82 via the output unit 15.
  • the control device 82 lights the lighting fixture 81 based on the determination result of the determination unit 124 (at time t2).
  • the detection unit 123 of the base unit 1 switches the operation mode from the entry detection mode to the stay detection mode.
  • Transmission control section 121 of base unit 1 changes the time length of period T1 of the synchronization signal from T11 to T12 based on the determination result of determination section 124.
  • the time length T12 indicates that the stay determination time T5 which is setting information is 3 minutes, and the lighting state of the lighting fixture 81 which is lighting information is on.
  • the slave units 2B and 2C switch the operation mode of the detection unit 223 from the entry detection mode to the stay detection mode by measuring the time length T12 of the cycle T1 of the synchronization signal.
  • the transmission control unit 221 detects stay from the transmission unit 251 by turning on the switch SW 21 for only the time T42 from the start point of the time slot Ts in the time slot Ts. Send a signal.
  • the determination unit 124 of the parent device 1 has the state of the detection space 90 It determines that it is a state. While the reception control unit 122 receives the stay detection signal, the determination unit 124 determines that the state of the detection space 90 is in the existing state. That is, lighting of the lighting fixture 81 is continued while the reception control unit 122 receives the stay detection signal after the entry determination time.
  • the detection unit 223 determines that the person 9 is staying in the detection range 92 during a stay determination time T5 from time t3 when the amplitude A2 of the output signal S2 finally exceeds the second detection threshold Vth22.
  • the start of the count of the stay determination time T5 may be when the amplitude A2 of the output signal S2 falls below the second detection threshold Vth22.
  • the transmission control unit 221 continues transmission of the stay detection signal during the stay determination time T5 (see FIG. 7).
  • the detection unit 223 detects that the person 9 has left the detection range 92 at time t4 when the duration of the state in which the amplitude A2 of the output signal S2 is lower than the second detection threshold Vth22 exceeds the stay determination time T5 (detection range It is determined that the person 9 does not exist in 92).
  • the transmission control unit 221 stops the transmission of the stay detection signal.
  • the reception control unit 122 of the base unit 1 determines that the transmission of the stay detection signal is stopped when the state in which the stay detection signal can not be received in the time slot Ts continues for a predetermined time (for example, 5 seconds).
  • the determination unit 124 determines that the state of the detection space 90 is an absent state.
  • the determination unit 124 outputs the determination result to the control device 82 via the output unit 15.
  • the control device 82 turns off the lighting device 81 based on the determination result of the determination unit 124 (at time t5).
  • Transmission control section 121 of base unit 1 changes the time length of period T1 of the synchronization signal from T12 to T11 based on the determination result of determination section 124.
  • the detection unit 223 of the slaves 2A, 2B, 2C switches the operation mode from the stay detection mode to the entry detection mode by measuring the time length T11 of the cycle T1 of the synchronization signal. Further, based on the determination result of the determination unit 124, the detection unit 123 of the parent device 1 switches the operation mode from the stay detection mode to the entry detection mode.
  • the time slot Ts is common to the slaves 2A, 2B and 2C. That is, the slaves 2A, 2B, 2C transmit an approach detection signal and a stay detection signal in one common time slot Ts. For example, it is assumed that the detection unit 223 of each of the slaves 2A, 2B, and 2C detects the presence of the person 9 in the stay detection mode.
  • each of the detection units 223 detects the presence of the person 9 in the stay detection mode.
  • the transmission control unit 221 of each of the slave units 2A and 2B transmits a stay detection signal by turning on the switch SW21 for a time T42 from the start point of the time slot Ts in the time slot Ts set based on the synchronization signal. That is, the switch SW21 of the handset 2A and the switch SW21 of the handset 2B are turned on at the same timing.
  • the detection unit 223 of the handset 2C detects the presence of the person 9 in the stay detection mode at a timing after the handsets 2A and 2B. Similar to the slave units 2A and 2B, the transmission control unit 221 of the slave unit 2C transmits a stay detection signal by turning on the switch SW21 for a time T42 from the start point of the time slot Ts. That is, the switches SW21 of the slaves 2A, 2B, 2C are turned on at the same timing.
  • one common time slot Ts is allocated to the plurality of handsets 2. Therefore, it is not necessary to assign different time slots to a plurality of handsets 2, and even if the number of handsets 2 is increased, it is possible to suppress the redundancy of the period T1 of the synchronization signal.
  • the plurality of handsets 2 transmit the stay detection signal at the same timing. Therefore, the period in which the voltage between the pair of wires 41 and 42 is the third voltage value V3 lower than the first voltage value V1 and the second voltage value V2 is limited, and the current flowing through the pair of wires 41 and 42 The average value of the current consumption of 2) can be suppressed.
  • the lighting apparatus 81 is turned off and the base unit 1 detects the presence of the person 9 in the entry detection mode among the plurality of communication terminals 3 (the base unit 1 and the handset 2).
  • the transmission control unit 121 of the parent device 1 causes the transmission unit 141 to transmit a synchronization signal whose period T1 has a time length of T11, since the determination result of the determination unit 124 is "absent state".
  • the amplitude A1 of the output signal S1 is equal to or greater than the first detection threshold Vth11, and the detection unit 123 of the parent device 1 determines that the person 9 has entered the detection range 91 (the person 9 is present in the detection range 91) Do.
  • the determination unit 124 determines that the state of the detection space 90 is in the existing state during a predetermined entry determination time because the detection unit 123 detects the entry of the person 9.
  • the determination unit 124 outputs the determination result to the control device 82 via the output unit 15.
  • the control device 82 lights the lighting fixture 81 based on the determination result of the determination unit 124. Further, the detection unit 123 switches the operation mode from the entry detection mode to the stay detection mode by detecting the presence of the person 9 in the entry detection mode.
  • the transmission control unit 121 changes the time length of the period T1 of the synchronization signal from T11 to T12 based on the determination result of the determination unit 124.
  • the transmission control unit 121 turns on the switch SW12 for only the time T41 from the start point of the time slot Ts in the time slot Ts after the detection unit 123 detects the presence of the person 9 in the entry detection mode. Send an entry detection signal from.
  • the transmission control unit 121 detects stay from the transmission unit 251 by turning on the switch SW 12 for only time T42 from the start point of the time slot Ts in time slot Ts. Send a signal.
  • the reception control unit 222 of the slave 2 receives an entry detection signal and a stay detection signal from the master 1 in the time slot Ts.
  • the detection unit 123 of the base unit 1 and the detection unit 223 of the handset 2 have determined the operation mode based on the determination result (lighting information) of the determination unit 124 of the base unit 1. Not exclusively.
  • the detection unit 123 of the main unit 1 sets the operation mode to be a stay detection mode, and when neither a transmission nor a reception of a stay detection signal, an operation mode is detected It may be configured to be in a mode.
  • the detection unit 223 of the handset 2 sets the operation mode to the stay detection mode, and neither transmits nor receives a stay detection signal, the operation mode. May be configured to be the entry detection mode.
  • the master unit 1 in the time slot Ts set based on the synchronization signal transmitted by the master unit 1, the master unit 1 itself transmits the entry detection signal and the stay detection signal as well as the slave unit 2 Do. That is, in the communication system 30 of the present embodiment, one common time slot Ts is allocated to a plurality of communication terminals 3 (base unit 1 and handset 2), and each communication terminal 3 (base unit 1, The slave 2) transmits and receives signals in a common time slot Ts. Therefore, it is not necessary to assign different time slots to a plurality of communication terminals 3, and even when the number of communication terminals 3 is increased, it is possible to suppress the redundancy of the period T1 of the synchronization signal.
  • Each communication terminal 3 (master unit 1, slave unit 2) is configured to shift to the inspection mode by an inspection signal transmitted from an inspection device electrically connected to the pair of electric wires 41 and 42.
  • the inspection signal is a voltage signal in which the voltage value of the voltage between the pair of electric wires 41 and 42 alternately changes between the first voltage value V1 and 0 V in a predetermined cycle (see FIG. 10B).
  • Each communication terminal 3 shifts to the inspection mode by receiving the inspection signal via the pair of electric wires 41 and 42. In the inspection mode, it can be inspected whether or not each function of the communication terminal 3 operates normally.
  • the binary signal level (voltage value) of the inspection signal is not limited to the first voltage value V1 and 0 V, and may be a voltage value lower than the first voltage value V1 and the third voltage value V3, for example. Good.
  • the slave unit 2 is configured to shift to the inspection mode when the master unit 1 stops transmitting the synchronization signal for a certain period of time.
  • the slave unit 2 shifts to the inspection mode when the state where the voltage value of the voltage between the pair of electric wires 41 and 42 is the first voltage value V1 continues for a fixed time.
  • master device 1 After stopping transmission of the synchronization signal for a certain period of time, master device 1 resumes transmission of the synchronization signal.
  • the stay determination time is set to, for example, 5 seconds, and when the handset 2 detects the presence of the person 9, the lighting fixture 81 is turned on for 5 seconds. Thereby, it is possible to check whether the communication state between the master unit 1 and the slave unit 2 and whether the human detection function in the slave unit 2 is normal or not.
  • the duty of the synchronization signal also changes according to the time length of the cycle T1.
  • the duty is a period in which the voltage value of the voltage between the pair of electric wires 41 and 42 in the cycle T1 is the first voltage value V1 or the second voltage value V2.
  • the duty is a ratio of a period (pulse width T2) in which the voltage value of the voltage between the pair of electric wires 41 and 42 is the second voltage value V2 in the cycle T1.
  • Master device 1 may be configured to modulate only the duty (pulse width T2) of the synchronization signal.
  • the master unit 1 sets the cycle T1 of the synchronization signal constant and sets the pulse width T2 to a time length corresponding to the information to be transmitted to the slave unit 2.
  • the lighting apparatus 81 is turned off and the base unit 1 detects the presence of the person 9 in the entry detection mode among the plurality of communication terminals 3 (the base unit 1 and the handset 2).
  • the transmission control unit 121 of the parent device 1 causes the transmission unit 141 to transmit a synchronization signal in which the time length of the pulse width T2 is T21 in the cycle T1 because the determination result of the determination unit 124 is "absent state".
  • the time length T21 of the pulse width T2 indicates that the stay determination time which is the setting information is 3 minutes, and the lighting state of the lighting fixture 81 which is the lighting information is being turned off.
  • the slave 2 sets the stay determination time to 3 minutes by measuring the time length T21 of the pulse width T2 of the synchronization signal, and sets the operation mode to the entry detection mode.
  • the amplitude A1 of the output signal S1 is equal to or greater than the first detection threshold Vth11, and the detection unit 123 of the parent device 1 determines that the person 9 has entered the detection range 91 (the person 9 is present in the detection range 91) Do. Thereby, the lighting fixture 81 is turned on.
  • the transmission control unit 121 changes the time length of the pulse width T2 of the synchronization signal from T21 to T22.
  • the time length T22 indicates that the stay determination time as setting information is 3 minutes, and the lighting state of the lighting fixture 81 as lighting information is on.
  • the slave unit 2 switches the operation mode from the entry detection mode to the stay detection mode by measuring the time length T22 of the pulse width T2 of the synchronization signal.
  • transmission control unit 121 enters in time slot Ts starting at time T30 after the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the second voltage value V2. Send a detection signal. After time t7, the amplitude A1 of the output signal S1 becomes equal to or greater than the second detection threshold Vth12, and the transmission control unit 121 transmits a stay detection signal in the time slot Ts.
  • the parent device 1 changes only the duty (pulse width T2) of the synchronization signal, but the present invention is not limited to this.
  • the master unit 1 may be configured to modulate both the period T1 and the pulse width T2 of the synchronization signal so as to make the duty constant and change only the period T1.
  • the base-side controller 12 and the child-side controller 22 in the present disclosure include a computer system.
  • a computer system mainly includes one or more processors and memory as hardware. When one or more processors execute the program recorded in the memory of the computer system, the functions as the base unit control unit 12 and the slave unit control unit 22 in the present disclosure are realized.
  • the program may be pre-recorded in the memory of the computer system, may be provided through a telecommunication line, and recorded in a non-transitory recording medium such as a computer system-readable memory card, an optical disc, a hard disk drive, etc. It may be provided.
  • Each of the one or more processors of the computer system is configured with one or more electronic circuits, including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI).
  • the plurality of electronic circuits may be integrated into one chip or may be distributed to a plurality of chips.
  • the plurality of chips may be integrated into one device or may be distributed to a plurality of devices.
  • at least a part of the functions of the base unit side control unit 12 and the handset side control unit 22 may be realized by, for example, a server or a cloud (cloud computing).
  • the communication terminal 3 is a moving body detection device that detects the presence of a moving body (person 9) in the detection range
  • the present invention is not limited to this configuration.
  • the communication terminal 3 may be, for example, a detection device that detects brightness, temperature, and the like.
  • a detection function (sensor function) is not an essential structure, and the detection function may be abbreviate
  • the communication system 30 is a lighting control system that controls the lighting system 80
  • the present invention is not limited to this configuration.
  • the communication system 30 may be a control system that controls an air conditioner as a load device.
  • the communication system 30 should just be equipped with the several communication terminal 3, and the function which controls a load apparatus is not essential.
  • the master unit 1 and the slave unit 2 are electrically connected via the pair of electric wires 41 and 42 and wired communication via the pair of electric wires 41 and 42 has been described. Not exclusively.
  • the master unit 1 and the slave unit 2 may be configured to perform wireless communication.
  • the plurality of communication terminals 3 may include the communication terminals 3 transmitting signals in time slots different from the common time slot in which two or more communication terminals 3 transmit signals.
  • the communication device (the base unit 1) according to the first aspect includes a communication unit (the base unit communication unit 14) and a control unit (the base unit control unit 12).
  • the communication unit (14) transmits the synchronization signal to the child device (2).
  • the control unit (12) controls the communication unit (14).
  • the synchronization signal is a signal for synchronizing the communication device (1) and the slave (2), and the signal level is periodically switched between at least two values.
  • the control unit (12) has at least a cycle (T1) in which the signal level of the synchronization signal switches between two values, and a duty which is a ratio of a period in which the signal level is one of two values in the cycle (T1) One is modulated in accordance with the information to be transmitted to the slave (2).
  • At least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
  • the communication device (1) further includes a power supply unit (master device side power supply unit 13).
  • the power supply unit (13) supplies power to the child device (2) through the pair of electric wires (41, 42).
  • the communication unit (14) transmits the synchronization signal to the slave (2) via the pair of electric wires (41, 42).
  • the synchronization signal is a first voltage in which the voltage value of the voltage between the pair of electric wires (41, 42) is a signal level and the binary It is a voltage signal that changes at least between the value (V1) and the second voltage value (V2).
  • the control unit (12) receives the signal transmitted from the child device (2), in which the voltage value of the voltage between the pair of electric wires (41, 42) changes to the third voltage value (V3).
  • control unit (12) sets the slave unit (in one time slot (Ts) set based on the synchronization signal). Receive the signal from 2).
  • control unit (12) transmits a signal to the slave (2) in the time slot (Ts).
  • the communication device (1) and the child device (2) transmit the signal in one common time slot (Ts), the signal can be simplified.
  • the communication unit (14) can communicate with a plurality of handsets (2).
  • the control unit (12) receives signals from the plurality of handsets (2) in the time slot (Ts).
  • the plurality of handsets (2) transmit the signal in one common time slot (Ts), the signal can be simplified.
  • the slave unit (2) according to the seventh aspect receives the synchronization signal from the communication device (1) according to any of the first to sixth aspects.
  • At least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
  • a communication system (30) according to an eighth aspect includes the communication device (1) according to any of the first to sixth aspects, and a slave (2) of the seventh aspect.
  • the communication system (30) according to the eighth aspect includes the communication device (1) according to any one of the first to sixth aspects, and a slave (2) that receives a synchronization signal from the communication device (1) And.
  • At least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
  • a program according to a ninth aspect causes a computer system to function as the control unit (12) of the communication device (1) according to any of the first to sixth aspects.
  • At least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.

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Abstract

Provided are: a communication device which is capable of simplifying signals; a slave device; a communication system; and a program. A master device (1) is provided with a master device-side communication unit (14) and a master device-side control unit (12). The master device-side communication unit (14) transmits a synchronization signal to a slave device (2). The master device-side control unit (12) controls the master device-side communication unit (14). The synchronization signal synchronizes the master device (1) and the slave device (2), and has a signal level which is periodically switched between at least two values. The master device-side control unit (12) modulates, in accordance with information transmitted to the slave device (2), the period at which the signal level of the synchronization signal is switched between the two values, and/or the duty, i.e. the proportion of time for which the signal level is one of the two values in the period.

Description

通信装置、子機、通信システム、及びプログラムCommunication device, slave unit, communication system, and program
　本開示は、一般に通信装置、子機、通信システム、及びプログラムに関し、より詳細には同期信号を送信する通信装置、子機、通信システム、及びプログラムに関する。 The present disclosure relates generally to communication devices, slaves, communication systems, and programs, and more particularly to communication devices, slaves, communication systems, and programs that transmit synchronization signals.
　従来、画像センサ（通信装置）と伝送制御装置とが２線式の信号線で接続された負荷制御システム（通信システム）が開示されている（例えば、特許文献１参照）。特許文献１に記載の負荷制御システムは、画像センサと、表示端末と、伝送制御装置とを備えている。画像センサは、検知対象の空間を撮像し且つ撮像した画像のうち予め設定された検知領域内の人の存否を検知する。表示端末は、検知領域を表示する表示部を有する。伝送制御装置は、画像センサ及び表示端末が２線式の信号線を介して接続される。 Conventionally, a load control system (communication system) in which an image sensor (communication device) and a transmission control device are connected by a two-wire signal line is disclosed (for example, see Patent Document 1). The load control system described in Patent Document 1 includes an image sensor, a display terminal, and a transmission control device. The image sensor captures a space of a detection target, and detects the presence or absence of a person in a detection area set in advance among the captured images. The display terminal has a display unit that displays a detection area. In the transmission control device, the image sensor and the display terminal are connected via a two-wire signal line.
　画像センサは、検知領域を示す領域データを含む伝送信号を、信号線を介して伝送制御装置に伝送するように構成されている。また、伝送制御装置は、画像センサから伝送された領域データと、表示端末のアドレスに一致するアドレスデータとを含む伝送信号を、信号線を介して表示端末に伝送するように構成されている。そして、表示端末は、領域データに基づいて検知領域を表示部に表示するように構成されている。 The image sensor is configured to transmit a transmission signal including area data indicating a detection area to the transmission control device via the signal line. Further, the transmission control device is configured to transmit a transmission signal including the area data transmitted from the image sensor and the address data matching the address of the display terminal to the display terminal via the signal line. The display terminal is configured to display the detection area on the display unit based on the area data.
　特許文献１に記載の負荷制御システムでは、伝送制御装置は、信号線を介して、画像センサとの間でアドレスデータを含む伝送信号を伝送するように構成されている。伝送信号は、スタートパルス信号、モードデータ、アドレスデータ、制御データ、チェックサムデータ及び信号返送期間より構成される。そのため、特許文献１に記載の負荷制御システムでは、信号が複雑化するおそれがあった。 In the load control system described in Patent Document 1, the transmission control device is configured to transmit a transmission signal including address data to and from the image sensor via the signal line. The transmission signal comprises a start pulse signal, mode data, address data, control data, checksum data, and a signal return period. Therefore, in the load control system described in Patent Document 1, there is a possibility that the signal becomes complicated.
特開２０１５－１５２３１４号公報JP, 2015-152314, A
　本開示は、上記事由に鑑みてなされており、その目的は、信号の簡略化を図ることができる通信装置、子機、通信システム、及びプログラムを提供することにある。 The present disclosure has been made in view of the above, and an object thereof is to provide a communication device, a slave, a communication system, and a program capable of achieving simplification of a signal.
　本開示の一態様に係る通信装置は、通信部と、制御部と、を備える。前記通信部は、子機に同期信号を送信する。前記制御部は、前記通信部を制御する。前記同期信号は、前記通信装置と前記子機とを同期させる信号であり、信号レベルが少なくとも２値間で周期的に切り替わる。前記制御部は、前記同期信号の前記信号レベルが前記２値間で切り替わる周期と、前記周期において前記信号レベルが前記２値の一方の値である期間の割合であるデューティと、の少なくとも一方を、前記子機に伝達する情報に応じて変調する。 A communication apparatus according to an aspect of the present disclosure includes a communication unit and a control unit. The communication unit transmits a synchronization signal to the slave unit. The control unit controls the communication unit. The synchronization signal is a signal for synchronizing the communication device and the slave, and the signal level is periodically switched between at least two values. The control unit performs at least one of a cycle in which the signal level of the synchronization signal is switched between the two values and a duty that is a ratio of a period in which the signal level is one of the two values in the cycle. , Modulate according to the information to be transmitted to the child device.
　本開示の一態様に係る子機は、前記通信装置からの前記同期信号を受信する。 The slave according to an aspect of the present disclosure receives the synchronization signal from the communication device.
　本開示の一態様に係る通信システムは、前記通信装置と、前記子機と、を備える。 A communication system according to an aspect of the present disclosure includes the communication device and the slave.
　本開示の一態様に係るプログラムは、コンピュータシステムを前記通信装置の前記制御部として機能させる。 A program according to an aspect of the present disclosure causes a computer system to function as the control unit of the communication device.
図１は、本開示の一実施形態に係る通信システムのブロック図である。FIG. 1 is a block diagram of a communication system according to an embodiment of the present disclosure. 図２Ａは、同上の通信システムが備える親機のブロック図である。図２Ｂは、同上の通信システムが備える子機のブロック図である。FIG. 2A is a block diagram of a master provided in the communication system of the same. FIG. 2B is a block diagram of a slave provided in the communication system. 図３は、同上の通信システムの使用例を示す図である。FIG. 3 is a diagram showing an example of use of the above communication system. 図４は、同上の通信システムの第１動作例を示すタイミングチャートである。FIG. 4 is a timing chart showing a first operation example of the communication system of the above. 図５は、同上の通信システムの第１動作例を示すフローチャートである。FIG. 5 is a flow chart showing a first operation example of the above communication system. 図６は、同上の通信システムの第２動作例を示すタイミングチャートである。FIG. 6 is a timing chart showing a second operation example of the communication system of the above. 図７は、同上の通信システムの第２動作例を示す別のタイミングチャートである。FIG. 7 is another timing chart showing a second operation example of the communication system same as the above. 図８は、同上の通信システムの第２動作例を示す別のタイミングチャートである。FIG. 8 is another timing chart showing a second operation example of the communication system same as the above. 図９は、同上の通信システムの第３動作例を示すタイミングチャートである。FIG. 9 is a timing chart showing a third operation example of the communication system of the same as the above. 図１０Ａは、同上の通信システムの第４動作例を説明するためのブロック図である。図１０Ｂは、同上の通信システムの第４動作例を示すタイミングチャートである。FIG. 10A is a block diagram for explaining a fourth operation example of the communication system same as the above. FIG. 10B is a timing chart showing a fourth operation example of the communication system of the same. 図１１は、実施形態の変形例に係る通信システムの動作例を示すタイミングチャートである。FIG. 11 is a timing chart showing an operation example of the communication system according to the modification of the embodiment.
　以下に説明する各実施形態及び変形例は、本開示の一例に過ぎず、本開示は、実施形態及び変形例に限定されない。この実施形態及び変形例以外であっても、本開示の技術的思想を逸脱しない範囲であれば、設計等に応じて種々の変更が可能である。 Each embodiment and modification described below are only examples of the present disclosure, and the present disclosure is not limited to the embodiments and modifications. Even if it is a range other than this embodiment and modification, if it is a range which does not deviate from the technical idea of this indication, various changes are possible according to a design etc.
　（１）概要
　本実施形態の通信システム３０のブロック図を図１に示す。本実施形態の通信システム３０は、互いに通信可能な複数の通信端末３を備えている。複数の通信端末３は、１つの親機１（通信装置）と、複数（図１では３台）の子機２とを含んでいる。以下の説明では、親機１、及び子機２を区別しない場合、通信端末３という。また、３台の子機２を区別する場合、子機２Ａ、子機２Ｂ、子機２Ｃとする。なお、通信システム３０において、子機２の台数は３台に限らず、１台であってもよいし、２又は４以上の台数であってもよい。 (1) Outline FIG. 1 shows a block diagram of a communication system 30 of the present embodiment. The communication system 30 of the present embodiment includes a plurality of communication terminals 3 that can communicate with each other. The plurality of communication terminals 3 include one master 1 (communication device) and a plurality of (three in FIG. 1) slaves 2. In the following description, when the master unit 1 and the slave unit 2 are not distinguished from one another, they are referred to as the communication terminal 3. Further, in the case of distinguishing the three handsets 2, the handset 2A, the handset 2B, and the handset 2C are used. In the communication system 30, the number of handsets 2 is not limited to three, and may be one, or two or four or more.
　親機１と複数の子機２とは一対の電線４１，４２で電気的に接続されている。具体的には、複数の子機２は、一対の電線４１，４２を介して親機１に渡り配線（マルチドロップ配線）されている。親機１は、一対の電線４１，４２を介して複数の子機２の各々に電力を供給する。複数の子機２間は、例えば送り配線によって一対の電線４１，４２で電気的に接続されている。 The base unit 1 and the plurality of handsets 2 are electrically connected by a pair of electric wires 41 and 42. Specifically, the plurality of handsets 2 are wired (multi-drop wiring) to the master 1 via the pair of electric wires 41 and 42. The base unit 1 supplies power to each of the plurality of handsets 2 via the pair of electric wires 41 and 42. The plurality of handsets 2 are electrically connected by a pair of electric wires 41 and 42 by, for example, feed wiring.
　親機１及び複数の子機２の各々は、一対の電線４１，４２間の電圧を降圧することにより、他の通信端末３に信号を送信する。親機１及び複数の子機２の各々は、一対の電線４１，４２間の電圧を監視することにより、他の通信端末３からの信号を受信する。つまり、親機１と子機２とは、一対の電線４１，４２を介して双方向の通信が可能となる。 Each of the master unit 1 and the plurality of handsets 2 transmits a signal to the other communication terminal 3 by reducing the voltage between the pair of electric wires 41 and 42. Each of the master unit 1 and the plurality of handsets 2 receives a signal from another communication terminal 3 by monitoring the voltage between the pair of electric wires 41 and 42. That is, the master unit 1 and the slave unit 2 can perform two-way communication via the pair of electric wires 41 and 42.
　本実施形態の通信システム３０は、照明システム８０を制御する照明制御システムとしての機能を有している。各通信端末３は、検知範囲における動体の存在を検知する動体検知装置としての機能を有している。本実施形態では、検知対象物である動体として人９を想定している（図３参照）。つまり、各通信端末３は、人検知装置としての機能を有している。各通信端末３は、例えば住宅、オフィス、店舗、学校、病院等に設定された検知範囲における人９の存在を検知する。本実施形態では、各通信端末３は、特に、赤外線の受光強度の変化を検知することにより、赤外線を放射する検知対象物（人９）の存在を検知する。なお、図３では、１台の親機１と、１台の子機２のみを図示し、他の子機２を省略している。 The communication system 30 of the present embodiment has a function as a lighting control system that controls the lighting system 80. Each communication terminal 3 has a function as a moving body detection device that detects the presence of a moving body in the detection range. In the present embodiment, a person 9 is assumed as a moving object which is a detection target (see FIG. 3). That is, each communication terminal 3 has a function as a human detection device. Each communication terminal 3 detects the presence of the person 9 in a detection range set in, for example, a house, an office, a store, a school, a hospital or the like. In the present embodiment, each communication terminal 3 particularly detects the change in the light reception intensity of the infrared light to detect the presence of the detection target (person 9) that emits the infrared light. In FIG. 3, only one master unit 1 and one slave unit 2 are illustrated, and the other slave units 2 are omitted.
　子機２は、検知範囲９２からの赤外線の強度変化に基づいて、人９の存在を検知する。すなわち、子機２は、検知範囲９２外から検知範囲９２内への人９の移動、又は検知範囲９２内での人９の微動によって生じる、赤外線の受光強度の変化から、人９の存在を検知する。ここでいう「微動」とは、例えば、人９の呼吸による身体の揺らぎ、及び身じろぎ等、人９の比較的小さな移動を伴わない動きを意味する。 The child device 2 detects the presence of the person 9 based on the change in the intensity of the infrared light from the detection range 92. That is, the child device 2 moves the person 9 from the outside of the detection range 92 into the detection range 92 or changes in the light reception intensity of infrared light caused by the slight movement of the person 9 in the detection range 92. Detect Here, “micromotion” means, for example, movement of the person 9 without movement, such as shaking of the body due to the breathing of the person 9 and gestures.
　子機２は、検知範囲９２での人９の存在を検知すると、一対の電線４１，４２を介して他の通信端末３に人検知信号を出力する。子機２は、検知範囲９２で人９の存在を検知しなくなると、人検知信号の出力を停止する。 Upon detecting the presence of the person 9 in the detection range 92, the slave 2 outputs a person detection signal to the other communication terminal 3 via the pair of electric wires 41 and 42. The slave unit 2 stops the output of the human detection signal when it does not detect the presence of the person 9 in the detection range 92.
　親機１は、検知範囲９１からの赤外線の強度変化に基づいて、人９の存在を検知する。すなわち、親機１は、検知範囲９１外から検知範囲９１内への人９の移動、又は検知範囲９１内での人９の微動によって生じる、赤外線の受光強度の変化から、人９の存在を検知する。 The parent device 1 detects the presence of the person 9 based on the intensity change of the infrared light from the detection range 91. That is, the base unit 1 detects the presence of the person 9 from the change of the light reception intensity of the infrared light caused by the movement of the person 9 from outside the detection range 91 into the detection range 91 or the slight movement of the person 9 in the detection range 91. Detect
　子機２の検知範囲９２と、親機１の検知範囲９１とは、同じであってもよいし、一部重複していてもよいし、全く重複していなくてもよい。図３の例では、子機２の検知範囲９２と、親機１の検知範囲９１とが一部重複している。以下、検知範囲９１、９２を含む空間を検知空間９０と呼ぶ。 The detection range 92 of the slave 2 and the detection range 91 of the master 1 may be the same, may partially overlap, or may not overlap at all. In the example of FIG. 3, the detection range 92 of the slave 2 and the detection range 91 of the master 1 partially overlap. Hereinafter, a space including the detection ranges 91 and 92 is referred to as a detection space 90.
　親機１は、子機２からの人検知信号の有無と、親機１自身の人検知結果とから、検知空間９０の状態が存在状態と不在状態とのいずれであるかを判定する。ここでいう「存在状態」とは、検知空間９０に人９が存在する状態である。「不在状態」とは、検知空間９０に人９が存在しない状態である。 The base unit 1 determines whether the state of the detection space 90 is the presence state or the absence state from the presence or absence of the human detection signal from the slave unit 2 and the human detection result of the base unit 1 itself. The “presence state” mentioned here is a state in which the person 9 is present in the detection space 90. The “absent state” is a state in which the person 9 does not exist in the detection space 90.
　親機１は、照明システム８０の動作状態を制御する機能を有している。親機１は、検知空間９０の状態の判定結果（存在状態と不在状態とのいずれであるか）に応じて、照明システム８０の動作状態を制御する。親機１は、検知空間９０の状態の判定結果を照明システム８０に通知することで、照明システム８０の動作状態を制御する。 The parent device 1 has a function of controlling the operating state of the lighting system 80. The base unit 1 controls the operation state of the illumination system 80 according to the determination result of the state of the detection space 90 (either the existing state or the absent state). The main | base station 1 controls the operation state of the illumination system 80 by notifying the determination result of the state of the detection space 90 to the illumination system 80.
　照明システム８０は、検知空間９０を照明する照明器具８１と、照明器具８１を制御する制御装置８２と、を備えている。制御装置８２は、親機１から通知される判定結果が「存在状態」であれば、照明器具８１を点灯させる。一方、親機１から通知される判定結果が「不在状態」であれば、制御装置８２は、照明器具８１を消灯させる。制御装置８２は、例えば、照明器具８１への給電路に挿入され照明器具８１の通電をオン／オフするスイッチを備える。つまり、親機１の判定結果に応じて照明器具８１の動作状態（点灯／消灯）が制御される。 The lighting system 80 includes a lighting fixture 81 that illuminates the detection space 90 and a controller 82 that controls the lighting fixture 81. If the determination result notified from the parent device 1 is the "presence state", the control device 82 turns on the lighting device 81. On the other hand, if the determination result notified from the parent device 1 is “absent state”, the control device 82 turns off the lighting device 81. The control device 82 includes, for example, a switch that is inserted in the power feeding path to the lighting fixture 81 and turns on / off the lighting of the lighting fixture 81. That is, according to the determination result of the main | base station 1, the operation state (lighting / extinguishing) of the lighting fixture 81 is controlled.
　（２）詳細
　以下に、通信システム３０、親機１、子機２の詳細な構成について説明する。 (2) Details The detailed configurations of the communication system 30, the base unit 1, and the handset 2 will be described below.
　（２．１）親機
　まず、親機１の構成について説明する。親機１は、図２Ａに示すように、受光部１１と、親機側制御部１２（制御部）と、親機側電源部１３（電源部）と、親機側通信部１４（通信部）と、出力部１５と、を備えている。 (2.1) Base Unit First, the configuration of the base unit 1 will be described. As shown in FIG. 2A, the master unit 1 has a light receiving unit 11, a master unit control unit 12 (control unit), a master unit power supply unit 13 (power supply unit), and a master unit communication unit 14 (communication unit). And an output unit 15.
　親機側電源部１３は、例えば全波整流回路とスイッチング電源回路を有するＡＣ／ＤＣコンバータである。親機側電源部１３は、交流電源６から供給される交流電圧を、第１電圧値Ｖ１（第１信号レベル）の直流電圧に変換して一対の電線４１，４２間に出力する。第１電圧値Ｖ１は、例えば１５Ｖである。また、親機側電源部１３は、交流電源６が出力する交流電力から、親機１の動作用の電力を生成している。交流電源６は、例えば商用電源である。なお、親機側電源部１３は、ＡＣ／ＤＣコンバータに限らず、バッテリであってもよい。 The parent device side power supply unit 13 is, for example, an AC / DC converter having a full wave rectification circuit and a switching power supply circuit. The parent device side power supply unit 13 converts the AC voltage supplied from the AC power supply 6 into a DC voltage of a first voltage value V1 (first signal level), and outputs the DC voltage between the pair of electric wires 41 and 42. The first voltage value V1 is 15 V, for example. Further, the base unit side power supply unit 13 generates power for operating the base unit 1 from the AC power output from the AC power supply 6. The AC power supply 6 is, for example, a commercial power supply. The parent device side power supply unit 13 is not limited to the AC / DC converter, and may be a battery.
　親機側通信部１４は、一対の電線４１，４２に電気的に接続されており、送信部１４１と受信部１４２とを備えている。 The base unit side communication unit 14 is electrically connected to the pair of electric wires 41 and 42, and includes a transmission unit 141 and a reception unit 142.
　送信部１４１は、一対の電線４１，４２間の電圧を降圧することにより、他の通信端末３（子機２）に電圧信号を送信する。送信部１４１は、ツェナーダイオードＺＤ１１，ＺＤ１２、及びスイッチＳＷ１１，ＳＷ１２を備えている。一対の電線４１，４２間において、ツェナーダイオードＺＤ１１とスイッチＳＷ１１とが電気的に直列接続されている。一対の電線４１，４２間において、ツェナーダイオードＺＤ１２とスイッチＳＷ１２とが電気的に直列接続されている。 The transmission unit 141 transmits a voltage signal to the other communication terminal 3 (the handset 2) by reducing the voltage between the pair of electric wires 41 and 42. The transmission unit 141 includes Zener diodes ZD11 and ZD12, and switches SW11 and SW12. The zener diode ZD11 and the switch SW11 are electrically connected in series between the pair of electric wires 41 and 42. The zener diode ZD12 and the switch SW12 are electrically connected in series between the pair of electric wires 41 and 42.
　ツェナーダイオードＺＤ１１のツェナー電圧（降伏電圧）の電圧値は、第２電圧値Ｖ２（第２信号レベル）である。第２電圧値Ｖ２は、親機側電源部１３が出力する直流電圧の電圧値（第１電圧値Ｖ１）よりも低い値である。第２電圧値Ｖ２は、例えば１２Ｖである。 The voltage value of the Zener voltage (breakdown voltage) of the Zener diode ZD11 is a second voltage value V2 (second signal level). The second voltage value V2 is a value lower than the voltage value (first voltage value V1) of the DC voltage output from the parent device side power supply unit 13. The second voltage value V2 is 12 V, for example.
　ツェナーダイオードＺＤ１２のツェナー電圧（降伏電圧）の電圧値は、第３電圧値Ｖ３である。第３電圧値Ｖ３は、親機側電源部１３が出力する直流電圧の電圧値（第１電圧値Ｖ１）、及びツェナーダイオードＺＤ１２のツェナー電圧の電圧値（第２電圧値Ｖ２）よりも低い値である。第３電圧値Ｖ３は、例えば７Ｖである。 The voltage value of the Zener voltage (breakdown voltage) of the Zener diode ZD12 is a third voltage value V3. The third voltage value V3 is lower than the voltage value (first voltage value V1) of the DC voltage output from the parent device side power supply unit 13 and the voltage value (second voltage value V2) of the Zener voltage of the Zener diode ZD12. It is. The third voltage value V3 is 7 V, for example.
　スイッチＳＷ１１，ＳＷ１２は、例えばＭＯＳＦＥＴ（Metal Oxide Semiconductor Field Effect Transistor）等の半導体スイッチである。スイッチＳＷ１１，ＳＷ１２は、親機側制御部１２の送信制御部１２１によってオン／オフが制御される。 The switches SW11 and SW12 are semiconductor switches such as, for example, MOSFETs (Metal Oxide Semiconductor Field Effect Transistors). The switches SW11 and SW12 are controlled to be turned on / off by the transmission control unit 121 of the master device control unit 12.
　スイッチＳＷ１１，ＳＷ１２が共にオフである場合、一対の電線４１，４２間の電圧値が第１電圧値Ｖ１となる。スイッチＳＷ１１がオン、スイッチＳＷ１２がオフである場合、ツェナーダイオードＺＤ１１に電流が流れ、一対の電線４１，４２間の電圧値が第２電圧値Ｖ２となる。スイッチＳＷ１２がオンである場合、ツェナーダイオードＺＤ１２に電流が流れ、一対の電線４１，４２間の電圧値が第３電圧値Ｖ３となる。なお、ここでは、後述する子機２のスイッチＳＷ２１がオフである場合を想定している。 When the switches SW11 and SW12 are both off, the voltage value between the pair of electric wires 41 and 42 becomes the first voltage value V1. When the switch SW11 is on and the switch SW12 is off, a current flows through the Zener diode ZD11, and the voltage value between the pair of electric wires 41 and 42 becomes the second voltage value V2. When the switch SW12 is on, a current flows through the Zener diode ZD12, and the voltage value between the pair of electric wires 41 and 42 becomes the third voltage value V3. Here, it is assumed that the switch SW21 of the handset 2 described later is off.
　つまり、送信部１４１は、スイッチＳＷ１１，ＳＷ１２がオン／オフすることによって、一対の電線４１，４２間の電圧を変化（降圧）させることによって電圧信号を送信する。親機１が他の通信端末３（子機２）に送信する電圧信号は、３段階（第１電圧値Ｖ１、第２電圧値Ｖ２、第３電圧値Ｖ３）の信号レベル（一対の電線４１，４２間の電圧値）が設定されている。 That is, the transmission unit 141 transmits a voltage signal by changing (step-down) the voltage between the pair of electric wires 41 and 42 by turning on / off the switches SW11 and SW12. The voltage signal transmitted from the master unit 1 to the other communication terminal 3 (the slave unit 2) has three signal levels (a first voltage value V1, a second voltage value V2, a third voltage value V3) (pair of electric wires 41). , 42) is set.
　受信部１４２は、一対の電線４１，４２間の電圧を検出することにより、他の通信端末３（子機２）からの電圧信号を受信する。受信部１４２は、複数（図２では２つ）の抵抗Ｒ１１，Ｒ１２を備えている。一対の電線４１，４２間において、抵抗Ｒ１１と抵抗Ｒ１２とが電気的に直列接続されている。受信部１４２は、一対の電線４１，４２間の電圧を抵抗Ｒ１１，Ｒ１２で分圧した値を親機側制御部１２の受信制御部１２２に出力する。 The receiving unit 142 receives the voltage signal from the other communication terminal 3 (the handset 2) by detecting the voltage between the pair of electric wires 41 and 42. The receiving unit 142 includes a plurality of (two in FIG. 2) resistors R11 and R12. The resistor R11 and the resistor R12 are electrically connected in series between the pair of electric wires 41 and 42. The receiving unit 142 outputs a value obtained by dividing the voltage between the pair of electric wires 41 and 42 by the resistors R11 and R12 to the reception control unit 122 of the parent device control unit 12.
　受光部１１は、受光素子１１１と、処理回路１１２と、を有している。 The light receiving unit 11 includes a light receiving element 111 and a processing circuit 112.
　受光素子１１１は、焦電素子（赤外線受光素子）である。受光素子１１１は、検知範囲９１からの赤外線の受光強度の変化に応じた信号（電気信号）を出力する。 The light receiving element 111 is a pyroelectric element (infrared light receiving element). The light receiving element 111 outputs a signal (electric signal) according to the change in the light receiving intensity of the infrared light from the detection range 91.
　処理回路１１２は、受光素子１１１から出力される電気信号の信号処理を行う回路である。本実施形態では、一例として、処理回路１１２は、受光素子１１１から出力される電流信号を電圧信号に変換するＩＶ変換機能、電圧信号を増幅する増幅機能、及び増幅後のアナログ信号（電圧信号）をデジタル信号に変換するＡ／Ｄ変換機能を有している。したがって、受光部１１は、受光素子１１１から出力される電気信号に対応するデジタル信号を、出力信号Ｓ１として親機側制御部１２の検知部１２３に出力する。 The processing circuit 112 is a circuit that performs signal processing of the electrical signal output from the light receiving element 111. In the present embodiment, as an example, the processing circuit 112 converts the current signal output from the light receiving element 111 into a voltage signal, amplifies the voltage signal, and amplifies the amplified analog signal (voltage signal). Has an A / D conversion function to convert D into a digital signal. Therefore, the light receiving unit 11 outputs a digital signal corresponding to the electrical signal output from the light receiving element 111 to the detection unit 123 of the master control unit 12 as an output signal S1.
　受光部１１は、光学系１６（図３参照）と組み合わせて用いられる。光学系１６は、レンズ若しくはミラー、又はこれらの組み合わせからなり、検知範囲９１からの赤外線を受光素子１１１に集光する。本実施形態では、受光部１１は、親機側電源部１３、親機側通信部１４、親機側制御部１２等と共に、１つの筐体１７（図３参照）に収納される。受光部１１を備える親機１は、図３に示すように、例えば住宅の居室の天井に設置され、居室内に設定された検知範囲９１から赤外線を受光する。 The light receiving unit 11 is used in combination with the optical system 16 (see FIG. 3). The optical system 16 is composed of a lens or a mirror, or a combination of these, and condenses infrared light from the detection range 91 on the light receiving element 111. In the present embodiment, the light receiving unit 11 is housed in one housing 17 (see FIG. 3) together with the base unit power supply unit 13, the base unit communication unit 14, the base unit control unit 12, and the like. As shown in FIG. 3, for example, the main unit 1 including the light receiving unit 11 is installed on a ceiling of a living room of a house, and receives infrared light from a detection range 91 set in the living room.
　親機側制御部１２は、送信制御部１２１、受信制御部１２２、検知部１２３、及び判定部１２４を備えている。親機側制御部１２は、マイクロコンピュータなどのコンピュータを主構成とする。親機側制御部１２は、マイクロコンピュータのメモリに記録されたプログラムを、マイクロコンピュータのプロセッサで実行することにより、上記の各部の機能を実現する。プログラムはメモリに予め記録されていてもよいし、インターネットなどの電気通信回線を通して提供されてもよく、メモリカードなどの記録媒体に記録されて提供されてもよい。 The parent device control unit 12 includes a transmission control unit 121, a reception control unit 122, a detection unit 123, and a determination unit 124. The main control unit 12 mainly includes a computer such as a microcomputer. The parent device control unit 12 implements the functions of the above-described units by executing the program recorded in the memory of the microcomputer by the processor of the microcomputer. The program may be pre-recorded in a memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a recording medium such as a memory card.
　送信制御部１２１は、送信部１４１のスイッチＳＷ１１，ＳＷ１２のオン／オフを制御することにより、親機側通信部１４から他の通信端末３（子機２）に電圧信号を送信させる。送信制御部１２１は、スイッチＳＷ１１，ＳＷ１２をオン／オフさせる制御信号を個別に出力することにより、スイッチＳＷ１１，ＳＷ１２のオン／オフを個別に制御する。親機側通信部１４が他の通信端末３（子機２）に送信する電圧信号については、後述の「（３）動作例」の欄で詳細に説明する。 The transmission control unit 121 controls the on / off of the switches SW11 and SW12 of the transmission unit 141 to transmit a voltage signal from the base-unit communication unit 14 to the other communication terminal 3 (child unit 2). The transmission control unit 121 individually controls on / off of the switches SW11 and SW12 by individually outputting a control signal for turning on / off the switches SW11 and SW12. The voltage signal that the base unit side communication unit 14 transmits to the other communication terminal 3 (the handset 2) will be described in detail in the section of “(3) Operation example” described later.
　受信制御部１２２は、受信部１４２による一対の電線４１，４２間の電圧の抵抗分圧値を所定のサンプリング周期で取得することにより、一対の電線４１，４２間の電圧の電圧値を検出している。親機１と同様に、子機２は、一対の電線４１，４２間の電圧を変化（降圧）させる電圧信号を送信するように構成されている。受信制御部１２２は、一対の電線４１，４２間の電圧値の変化を検出することにより、子機２からの電圧信号を受信する。受信制御部１２２は、子機２からの電圧信号を受信することにより、子機２による検知範囲９２の人９の検知結果を受け取る。 The reception control unit 122 detects the voltage value of the voltage between the pair of electric wires 41 and 42 by acquiring the resistance division value of the voltage between the pair of electric wires 41 and 42 by the reception unit 142 in a predetermined sampling cycle. ing. Similar to the parent device 1, the child device 2 is configured to transmit a voltage signal that changes (steps down) the voltage between the pair of electric wires 41 and 42. The reception control unit 122 receives a voltage signal from the handset 2 by detecting a change in voltage value between the pair of electric wires 41 and 42. The reception control unit 122 receives the voltage signal from the child device 2 to receive the detection result of the person 9 in the detection range 92 by the child device 2.
　検知部１２３は、受光部１１（処理回路１１２）からの出力信号Ｓ１に基づいて、検知範囲９１に人９が存在するか否か、を判定する。検知部１２３の動作モードは、進入検知モードと滞在検知モードとを含んでいる。 The detection unit 123 determines whether or not the person 9 is present in the detection range 91 based on the output signal S1 from the light receiving unit 11 (processing circuit 112). The operation mode of the detection unit 123 includes an approach detection mode and a stay detection mode.
　進入検知モードは、検知範囲９１への人９の進入を検知するための動作モードである。検知部１２３は、検知空間９０（検知範囲９１、９２を含む空間）に人９が存在せず、照明器具８１が消灯している場合、進入検知モードで動作する。 The entry detection mode is an operation mode for detecting entry of the person 9 into the detection range 91. The detection unit 123 operates in the entry detection mode when the person 9 is not present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is turned off.
　滞在検知モードは、検知範囲９１からの人９の退出を検知するための動作モードである。検知部１２３は、検知空間９０（検知範囲９１、９２を含む空間）に人９が存在し、照明器具８１が点灯している場合、滞在検知モードで動作する。 The stay detection mode is an operation mode for detecting the leaving of the person 9 from the detection range 91. The detection unit 123 operates in the stay detection mode when the person 9 is present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is on.
　進入検知モードにおいて、検知部１２３は、出力信号Ｓ１の振幅Ａ１と第１検知閾値Ｖｔｈ１１との比較を行う（図９参照）。検知部１２３は、出力信号Ｓ１の振幅Ａ１が第１検知閾値Ｖｔｈ１１以上となれば、検知範囲９１に人９が進入した（検知範囲９１に人９が存在する）と判定する。そして、検知部１２３は、その旨を検知結果として判定部１２４に通知する。送信制御部１２１は、検知部１２３が進入検知モードで人９の存在を検知した場合、進入検知信号を送信部１４１から送信させる。また、検知部１２３は、複数の通信端末３（親機１、子機２）の少なくともいずれかが、対応する検知範囲への人９の進入を検知した場合、動作モードを進入検知モードから滞在検知モードに切り替える。 In the entry detection mode, the detection unit 123 compares the amplitude A1 of the output signal S1 with the first detection threshold Vth11 (see FIG. 9). If the amplitude A1 of the output signal S1 is equal to or greater than the first detection threshold Vth11, the detection unit 123 determines that the person 9 has entered the detection range 91 (the person 9 is present in the detection range 91). Then, the detection unit 123 notifies the determination unit 124 of the detection result. The transmission control unit 121 causes the transmission unit 141 to transmit an entry detection signal when the detection unit 123 detects the presence of the person 9 in the entry detection mode. In addition, when at least one of the plurality of communication terminals 3 (the base unit 1 and the handset 2) detects the entry of the person 9 into the corresponding detection range, the detection unit 123 stays in the operation mode from the entry detection mode. Switch to detection mode.
　滞在検知モードにおいて、検知部１２３は、出力信号Ｓ１の振幅Ａ１と第２検知閾値Ｖｔｈ１２との比較を行う。検知部１２３は、出力信号Ｓ１の振幅Ａ１が第２検知閾値Ｖｔｈ１２を下回っている状態の継続時間が、滞在判定時間を超えているか否かを判定する。検知部１２３は、出力信号Ｓ１の振幅Ａ１が第２検知閾値Ｖｔｈ１２を下回っている状態の継続時間が、滞在判定時間を超えると、検知範囲９１から人９が退出した（検知範囲９１に人９が存在しない）と判定する。言い換えれば、検知部１２３は、出力信号Ｓ１の振幅Ａ１が第２検知閾値Ｖｔｈ１２を最後に上回ってから滞在判定時間の間は、検知範囲９１に人９が滞在している（検知範囲９１に人９が存在する）と判定する。滞在判定時間のカウント値は、出力信号Ｓ１の振幅Ａ１が第２検知閾値Ｖｔｈ１２を上回る度にリセットさせる。 In the stay detection mode, the detection unit 123 compares the amplitude A1 of the output signal S1 with the second detection threshold Vth12. The detection unit 123 determines whether the duration of the state in which the amplitude A1 of the output signal S1 is lower than the second detection threshold Vth12 exceeds the stay determination time. When the duration of the state in which the amplitude A1 of the output signal S1 is lower than the second detection threshold Vth12 exceeds the stay determination time, the detection unit 123 has left the person 9 from the detection range 91 (the detection range 91 corresponds to the person 9). Is determined to be absent). In other words, the detection unit 123 detects that the person 9 stays in the detection range 91 during the stay determination time after the amplitude A1 of the output signal S1 lastly exceeds the second detection threshold Vth12 (a person in the detection range 91 It is determined that 9 exists. The count value of the stay determination time is reset each time the amplitude A1 of the output signal S1 exceeds the second detection threshold Vth12.
　滞在判定時間の値は、可変であり、ユーザによって、例えば１分、３分、５分、１０分等に設定される。そして、検知部１２３は、その旨を検知結果として判定部１２４に通知する。送信制御部１２１は、検知部１２３が滞在判定モードで人９の存在を検知した場合、滞在判定時間中、滞在検知信号を送信部１４１から送信させる。また、検知部１２３は、複数の通信端末３（親機１、子機２）の全てが、対応する検知範囲に人９が不在であると判定した場合、動作モードを滞在検知モードから進入検知モードに切り替える。なお、上記の滞在判定時間の数値は一例であって、上記数値に限らない。 The value of the stay determination time is variable, and is set by the user to, for example, one minute, three minutes, five minutes, ten minutes, or the like. Then, the detection unit 123 notifies the determination unit 124 of the detection result. When the detection unit 123 detects the presence of the person 9 in the stay determination mode, the transmission control unit 121 causes the transmission unit 141 to transmit a stay detection signal during the stay determination time. In addition, when the detection unit 123 determines that all of the plurality of communication terminals 3 (the base unit 1 and the handset 2) are absent in the corresponding detection range, the operation mode is detected as an entry from the stay detection mode. Switch to mode. In addition, the numerical value of said stay determination time is an example, Comprising: It does not restrict to said numerical value.
　本実施形態では、第１検知閾値Ｖｔｈ１１と第２検知閾値Ｖｔｈ１２とを同じ値としているが、互いに異なる値であってもよい。 In the present embodiment, the first detection threshold Vth11 and the second detection threshold Vth12 have the same value, but may have different values.
　判定部１２４は、検知部１２３からの検知結果と、複数の子機２による人９の検知結果と、に基づいて、検知空間９０（検知範囲９１、９２を含む空間）の状態が、存在状態と不在状態とのいずれであるかを判定する。判定部１２４は、検知部１２３と複数の子機２との少なくともいずれかが人９の進入を検知した場合、所定の進入判定時間の間は検知空間９０の状態が存在状態である、と判定する。進入判定時間は、例えば１分～３０分の間で可変であり、ユーザによって設定される。判定部１２４は、進入判定時間の経過後において、検知部１２３と複数の子機２との全てが人９の不在（退出）を検知した場合、検知空間９０の状態が不在状態である、と判定する。つまり、判定部１２４は、複数の通信端末３の全てにおける人９の進入／退出の検知結果から総合的に検知空間９０の状態が、存在状態と不在状態とのいずれであるかを判定する。判定部１２４は、検知空間９０が存在状態であるか不在状態であるかの判定結果を、出力部１５に通知する。 The determination unit 124 determines the state of the detection space 90 (the space including the detection ranges 91 and 92) based on the detection result from the detection unit 123 and the detection results of the person 9 by the plurality of handsets 2 To determine if it is or not. When at least one of the detection unit 123 and the plurality of handsets 2 detects the entry of the person 9, the determination unit 124 determines that the state of the detection space 90 is in the existing state during a predetermined entry determination time. Do. The entry determination time is variable, for example, between 1 minute and 30 minutes, and is set by the user. When all of the detection unit 123 and the plurality of handsets 2 detect the absence (exit) of the person 9 after the entry determination time has elapsed, the determination unit 124 determines that the state of the detection space 90 is the absence state, judge. That is, the determination unit 124 determines whether the state of the detection space 90 is the presence state or the absence state from the detection results of the entry / exit of the person 9 in all the plurality of communication terminals 3. The determination unit 124 notifies the output unit 15 of the determination result as to whether the detection space 90 is in the presence state or in the absence state.
　出力部１５は、照明システム８０の制御装置８２に信号を送信可能な通信インターフェースである。出力部１５は、判定部１２４の判定結果を、制御装置８２に出力する。具体的には、出力部１５は、判定部１２４の判定結果を示す判定信号を、制御装置８２に出力する。出力部１５は、判定部１２４による判定結果が「不在状態」の場合、「不在状態」を示す判定信号を出力する。出力部１５は、判定部１２４による判定結果が「存在状態」の場合、「存在状態」を示す判定信号を出力する。出力部１５は、例えば、判定部１２４の判定結果を表す判定信号を、制御装置８２に対してシリアル出力する。具体的には、出力部１５は、スタートビット、判定結果及びストップビットを含む判定信号を出力する。 The output unit 15 is a communication interface capable of transmitting a signal to the control device 82 of the lighting system 80. The output unit 15 outputs the determination result of the determination unit 124 to the control device 82. Specifically, the output unit 15 outputs a determination signal indicating the determination result of the determination unit 124 to the control device 82. When the determination result by the determination unit 124 is “an absent state”, the output unit 15 outputs a determination signal indicating “an absent state”. When the determination result by the determination unit 124 is the “presence state”, the output unit 15 outputs a determination signal indicating the “presence state”. The output unit 15 serially outputs, for example, a determination signal indicating the determination result of the determination unit 124 to the control device 82. Specifically, the output unit 15 outputs a determination signal including the start bit, the determination result, and the stop bit.
　制御装置８２は、親機１からの判定信号に基づいて、照明器具８１の点灯／消灯を制御するように構成されている。制御装置８２は、マイクロコンピュータなどのコンピュータを主構成とする。制御装置８２は、マイクロコンピュータのメモリに記録されたプログラムを、マイクロコンピュータのプロセッサで実行することにより、下記の種々の機能を実現する。プログラムはメモリに予め記録されていてもよいし、インターネットなどの電気通信回線を通して提供されてもよく、メモリカードなどの記録媒体に記録されて提供されてもよい。 The control device 82 is configured to control the lighting / extinguishing of the lighting fixture 81 based on the determination signal from the parent device 1. The controller 82 mainly includes a computer such as a microcomputer. The control device 82 implements the following various functions by executing the program stored in the memory of the microcomputer by the processor of the microcomputer. The program may be pre-recorded in a memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a recording medium such as a memory card.
　制御装置８２は、親機１から「不在状態」の検知結果を示す判定信号を受け取ると、検知空間９０の状態が「不在状態」であると判定し、照明器具８１を消灯させる。一方、制御装置８２は、親機１から「存在状態」の検知結果を示す判定信号を受け取ると、検知空間９０の状態が「存在状態」であると判定し、照明器具８１を点灯させる。 When the control device 82 receives the determination signal indicating the detection result of the “absent state” from the parent device 1, the control device 82 determines that the state of the detection space 90 is the “absent state”, and turns off the lighting fixture 81. On the other hand, when the control device 82 receives a determination signal indicating the detection result of the "presence state" from the parent device 1, the control device 82 determines that the state of the detection space 90 is the "presence state", and turns on the lighting fixture 81.
　（２．２）子機
　次に、子機２の構成について説明する。子機２は、図２Ｂに示すように、受光部２１と、子機側制御部２２と、ダイオードブリッジ（ＤＢ）２３と、子機側電源部２４と、子機側通信部２５と、を備えている。 (2.2) Mobile Unit Next, the configuration of the mobile unit 2 will be described. As shown in FIG. 2B, the slave unit 2 includes the light receiving unit 21, the slave unit-side control unit 22, the diode bridge (DB) 23, the slave unit-side power supply unit 24, and the slave unit-side communication unit 25. Have.
　ダイオードブリッジ２３は、複数のダイオードを備えるフルブリッジ回路である。ダイオードブリッジ２３は、入力端が一対の電線４１，４２に電気的に接続され、出力端に子機側電源部２４、及び子機側通信部２５が電気的に接続されている。 The diode bridge 23 is a full bridge circuit including a plurality of diodes. The diode bridge 23 has an input end electrically connected to the pair of electric wires 41 and 42, and an output end electrically connected to the slave unit side power supply unit 24 and the slave unit side communication unit 25.
　子機側電源部２４は、例えばＤＣ／ＤＣコンバータである。子機側電源部２４は、一対の電線４１，４２を介して親機１の親機側電源部１３から供給される直流電力から、子機２の動作用の電力を生成する。 The slave unit side power supply unit 24 is, for example, a DC / DC converter. The slave unit-side power supply unit 24 generates power for operating the slave unit 2 from the DC power supplied from the master unit-side power supply unit 13 of the master unit 1 via the pair of electric wires 41 and 42.
　子機側通信部２５は、ダイオードブリッジ２３を介して一対の電線４１，４２に電気的に接続されており、送信部２５１と受信部２５２とを備えている。 The slave unit side communication unit 25 is electrically connected to the pair of electric wires 41 and 42 via the diode bridge 23, and includes a transmission unit 251 and a reception unit 252.
　送信部２５１は、一対の電線４１，４２間の電圧を降圧することにより、他の通信端末３（親機１、子機２）に電圧信号を送信する。送信部２５１は、ツェナーダイオードＺＤ２１、及びスイッチＳＷ２１を備えている。一対の電線４１，４２間において、ツェナーダイオードＺＤ２１とスイッチＳＷ２１とが電気的に直列接続されている。具体的には、ツェナーダイオードＺＤ２１とスイッチＳＷ２１との直列回路は、ダイオードブリッジ２３の一対の出力端間に電気的に接続されている。 The transmitting unit 251 reduces the voltage between the pair of electric wires 41 and 42 to transmit a voltage signal to the other communication terminal 3 (master unit 1 and slave unit 2). The transmission unit 251 includes a Zener diode ZD21 and a switch SW21. The zener diode ZD21 and the switch SW21 are electrically connected in series between the pair of electric wires 41 and 42. Specifically, a series circuit of the Zener diode ZD21 and the switch SW21 is electrically connected between a pair of output terminals of the diode bridge 23.
　ツェナーダイオードＺＤ２１のツェナー電圧（降伏電圧）の電圧値は、第３電圧値Ｖ３である。つまり、ツェナーダイオードＺＤ２１のツェナー電圧の電圧値は、親機１における送信部１４１のツェナーダイオードＺＤ１２のツェナー電圧の電圧値（第３電圧値Ｖ３）と同じである。ここでいう同じとは、ツェナー電圧の電圧値の完全一致だけでなく、誤差が許容される範囲内である場合も含める。 The voltage value of the Zener voltage (breakdown voltage) of the Zener diode ZD21 is a third voltage value V3. That is, the voltage value of the Zener voltage of the Zener diode ZD21 is the same as the voltage value (third voltage value V3) of the Zener voltage of the Zener diode ZD12 of the transmission unit 141 in the parent device 1. The same as mentioned here includes not only the perfect match of the voltage value of the Zener voltage but also the case where the error is within the allowable range.
　スイッチＳＷ２１は、例えばＭＯＳＦＥＴ等の半導体スイッチである。スイッチＳＷ２１は、子機側制御部２２の送信制御部２２１によってオン／オフが制御される。 The switch SW21 is, for example, a semiconductor switch such as a MOSFET. The on / off of the switch SW21 is controlled by the transmission control unit 221 of the slave unit control unit 22.
　スイッチＳＷ２１がオフである場合、一対の電線４１，４２間の電圧値が第１電圧値Ｖ１となる。スイッチＳＷ２１がオンである場合、ツェナーダイオードＺＤ２１に電流が流れ、一対の電線４１，４２間の電圧が第３電圧値Ｖ３となる。なお、ここでは、親機１のスイッチＳＷ１１，ＳＷ１２、及び他の子機２のスイッチＳＷ２１がオフである場合を想定している。 When the switch SW21 is off, the voltage value between the pair of electric wires 41 and 42 becomes the first voltage value V1. When the switch SW21 is on, a current flows through the Zener diode ZD21, and the voltage between the pair of electric wires 41 and 42 becomes the third voltage value V3. Here, it is assumed that the switches SW11 and SW12 of the parent device 1 and the switch SW21 of the other handset 2 are off.
　つまり、送信部２５１は、スイッチＳＷ２１がオン／オフすることによって、一対の電線４１，４２間の電圧を変化（降圧）させる電圧信号を送信する。子機２が他の通信端末３（親機１、子機２）に送信する電圧信号は、２段階（第１電圧値Ｖ１、第３電圧値Ｖ３）の信号レベル（一対の電線４１，４２間の電圧値）が設定されている。 That is, the transmission unit 251 transmits a voltage signal that changes (steps down) the voltage between the pair of electric wires 41 and 42 by turning on / off the switch SW21. The voltage signal that handset 2 transmits to the other communication terminal 3 (master 1, handset 2) has two levels (first voltage value V1, third voltage value V3) signal levels (pair of electric wires 41, 42). Voltage value) is set.
　受信部２５２は、一対の電線４１，４２間の電圧を検出することにより、他の通信端末３（親機１、子機２）からの電圧信号を受信する。受信部２５２は、複数（図２では２つ）の抵抗Ｒ２１，Ｒ２２を備えている。一対の電線４１，４２間において、抵抗Ｒ２１と抵抗Ｒ２２とが電気的に直列接続されている。受信部２５２は、一対の電線４１，４２間の電圧を抵抗Ｒ２１，Ｒ２２で分圧した値を子機側制御部２２の受信制御部２２２に出力する。 The receiving unit 252 receives the voltage signal from the other communication terminal 3 (the base unit 1 and the handset 2) by detecting the voltage between the pair of electric wires 41 and 42. The receiving unit 252 includes a plurality of (two in FIG. 2) resistors R21 and R22. Between a pair of electric wires 41 and 42, resistance R21 and resistance R22 are electrically connected in series. The receiving unit 252 outputs a value obtained by dividing the voltage between the pair of electric wires 41 and 42 by the resistors R21 and R22 to the reception control unit 222 of the slave control unit 22.
　受光部２１は、受光素子２１１と、処理回路２１２と、を有している。 The light receiving unit 21 includes a light receiving element 211 and a processing circuit 212.
　受光素子２１１は、焦電素子（赤外線受光素子）である。受光素子２１１は、検知範囲９２からの赤外線の受光強度の変化に応じた信号（電気信号）を出力する。 The light receiving element 211 is a pyroelectric element (infrared light receiving element). The light receiving element 211 outputs a signal (electric signal) according to the change in the light receiving intensity of the infrared light from the detection range 92.
　処理回路２１２は、受光素子２１１から出力される電気信号の信号処理を行う回路である。本実施形態では、一例として、処理回路２１２は、受光素子２１１から出力される電流信号を電圧信号に変換するＩＶ変換機能、電圧信号を増幅する増幅機能、及び増幅後のアナログ信号（電圧信号）をデジタル信号に変換するＡ／Ｄ変換機能を有している。したがって、受光部２１は、受光素子２１１から出力される電気信号に対応するデジタル信号を、出力信号Ｓ２として子機側制御部２２の検知部２２３に出力する。 The processing circuit 212 is a circuit that performs signal processing of the electrical signal output from the light receiving element 211. In this embodiment, as an example, the processing circuit 212 converts the current signal output from the light receiving element 211 into a voltage signal, amplifies the voltage signal, and amplifies the amplified analog signal (voltage signal). Has an A / D conversion function to convert D into a digital signal. Therefore, the light receiving unit 21 outputs a digital signal corresponding to the electric signal output from the light receiving element 211 to the detecting unit 223 of the slave-side control unit 22 as an output signal S2.
　受光部２１は、光学系２６（図３参照）と組み合わせて用いられる。光学系２６は、レンズ若しくはミラー、又はこれらの組み合わせからなり、検知範囲９２からの赤外線を受光素子２１１に集光する。本実施形態では、受光部２１は、子機側電源部２４、子機側通信部２５、子機側制御部２２等と共に、１つの筐体２７（図３参照）に収納される。受光部２１を備える子機２は、図３に示すように、例えば住宅の居室の天井に設置され、居室内に設定された検知範囲９２から赤外線を受光する。 The light receiving unit 21 is used in combination with the optical system 26 (see FIG. 3). The optical system 26 is made of a lens or a mirror, or a combination of these, and condenses infrared light from the detection range 92 onto the light receiving element 211. In the present embodiment, the light receiving unit 21 is housed in one casing 27 (see FIG. 3) together with the slave unit side power supply unit 24, the slave unit side communication unit 25, the slave unit side control unit 22 and the like. As shown in FIG. 3, for example, the handset 2 provided with the light receiving unit 21 is installed on a ceiling of a living room of a house, and receives infrared light from a detection range 92 set in the living room.
　子機側制御部２２は、送信制御部２２１、受信制御部２２２、及び検知部２２３を備えている。子機側制御部２２は、マイクロコンピュータなどのコンピュータを主構成とする。子機側制御部２２は、マイクロコンピュータのメモリに記録されたプログラムを、マイクロコンピュータのプロセッサで実行することにより、上記の各部の機能を実現する。プログラムはメモリに予め記録されていてもよいし、インターネットなどの電気通信回線を通して提供されてもよく、メモリカードなどの記録媒体に記録されて提供されてもよい。 The slave unit control unit 22 includes a transmission control unit 221, a reception control unit 222, and a detection unit 223. The slave unit control unit 22 mainly includes a computer such as a microcomputer. The slave unit control unit 22 implements the functions of the above-described units by executing the program stored in the memory of the microcomputer by the processor of the microcomputer. The program may be pre-recorded in a memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a recording medium such as a memory card.
　送信制御部２２１は、送信部２５１のスイッチＳＷ２１のオン／オフを制御することにより、子機側通信部２５から他の通信端末３（親機１、子機２）に電圧信号を送信させる。送信制御部２２１は、スイッチＳＷ２１をオン／オフさせる制御信号を出力することにより、スイッチＳＷ２１のオン／オフを制御する。子機側通信部２５が他の通信端末３（親機１、子機２）に送信する電圧信号については、後述の「（３）動作例」の欄で詳細に説明する。 The transmission control unit 221 controls the on / off of the switch SW 21 of the transmission unit 251 to transmit a voltage signal from the handset communication unit 25 to the other communication terminal 3 (master unit 1, handset 2). The transmission control unit 221 controls the on / off of the switch SW <b> 21 by outputting a control signal to turn on / off the switch SW <b> 21. The voltage signals that the handset communication unit 25 transmits to the other communication terminals 3 (the base unit 1 and handset 2) will be described in detail in the section "(3) Operation example" described later.
　受信制御部２２２は、受信部２５２による一対の電線４１，４２間の電圧の抵抗分圧値を所定のサンプリング周期で取得することにより、一対の電線４１，４２間の電圧の電圧値を検出している。上述したように、各通信端末３（親機１、子機２）は、一対の電線４１，４２間の電圧を変化（降圧）させる電圧信号を送信するように構成されている。受信制御部２２２は、一対の電線４１，４２間の電圧値の変化を検出することにより、他の通信端末３（親機１、子機２）からの電圧信号を受信する。 The reception control unit 222 detects the voltage value of the voltage between the pair of electric wires 41 and 42 by acquiring the resistance division value of the voltage between the pair of electric wires 41 and 42 by the reception unit 252 at a predetermined sampling cycle. ing. As described above, each communication terminal 3 (the base unit 1 and the handset 2) is configured to transmit a voltage signal that changes (steps down) the voltage between the pair of electric wires 41 and 42. The reception control unit 222 receives a voltage signal from another communication terminal 3 (the base unit 1 and the handset 2) by detecting a change in voltage value between the pair of electric wires 41 and 42.
　検知部２２３は、受光部２１（処理回路２１２）からの出力信号Ｓ２に基づいて、検知範囲９２に人９が存在するか否か、を判定する。検知部２２３の動作モードは、進入検知モードと滞在検知モードとを含んでいる。 The detection unit 223 determines whether or not the person 9 is present in the detection range 92 based on the output signal S2 from the light receiving unit 21 (processing circuit 212). The operation mode of the detection unit 223 includes an approach detection mode and a stay detection mode.
　進入検知モードは、検知範囲９２への人９の進入を検知するための動作モードである。検知部２２３は、検知空間９０（検知範囲９１、９２を含む空間）に人９が存在せず、照明器具８１が消灯している場合、進入検知モードで動作する。 The entry detection mode is an operation mode for detecting the entry of the person 9 into the detection range 92. The detection unit 223 operates in the entry detection mode when the person 9 is not present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is turned off.
　滞在検知モードは、検知範囲９２からの人９の退出を検知するための動作モードである。検知部２２３は、検知空間９０（検知範囲９１、９２を含む空間）に人９が存在し、照明器具８１が点灯している場合、滞在検知モードで動作する。 The stay detection mode is an operation mode for detecting the leaving of the person 9 from the detection range 92. The detection unit 223 operates in the stay detection mode when the person 9 is present in the detection space 90 (a space including the detection ranges 91 and 92) and the lighting fixture 81 is on.
　進入検知モードにおいて、検知部２２３は、出力信号Ｓ２の振幅Ａ２と第１検知閾値Ｖｔｈ２１との比較を行う（図６、図７参照）。検知部２２３は、出力信号Ｓ２の振幅Ａ２が第１検知閾値Ｖｔｈ２１以上となれば、検知範囲９２に人９が進入した（検知範囲９２に人９が存在する）と判定する。送信制御部２２１は、検知部２２３が進入検知モードで人９の存在を検知した場合、進入検知信号を送信部２５１から送信させる。また、検知部２２３は、親機１から判定部１２４の判定結果を受け取ることにより、複数の通信端末３（親機１、子機２）の少なくともいずれかが、対応する検知範囲への人９の進入を検知した場合、動作モードを進入検知モードから滞在検知モードに切り替える。 In the entry detection mode, the detection unit 223 compares the amplitude A2 of the output signal S2 with the first detection threshold Vth21 (see FIGS. 6 and 7). If the amplitude A2 of the output signal S2 is equal to or greater than the first detection threshold Vth21, the detection unit 223 determines that the person 9 has entered the detection range 92 (the person 9 is present in the detection range 92). The transmission control unit 221 causes the transmission unit 251 to transmit an entrance detection signal when the detection unit 223 detects the presence of the person 9 in the entrance detection mode. In addition, the detection unit 223 receives the determination result of the determination unit 124 from the parent device 1 so that at least one of the plurality of communication terminals 3 (the parent device 1 and the child device 2) can receive the person 9 to the corresponding detection range. When it detects the approach of, the operation mode is switched from the approach detection mode to the stay detection mode.
　滞在検知モードにおいて、検知部２２３は、出力信号Ｓ２の振幅Ａ２と第２検知閾値Ｖｔｈ２２との比較を行う。検知部２２３は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を下回っている状態の継続時間が、滞在判定時間を超えているか否かを判定する。検知部２２３は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を下回っている状態が、滞在判定時間を継続すると、検知範囲９２から人９が退出した（検知範囲９２に人９が存在しない）と判定する。言い換えれば、検知部２２３は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を最後に上回ってから滞在判定時間の間は、検知範囲９２に人９が滞在している（検知範囲９２に人９が存在する）と判定する。滞在判定時間のカウント値は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を上回る度にリセットさせる。滞在判定時間の値は、可変であり、親機１によって、例えば１分、３分、５分、１０分等に設定される。子機２における滞在判定時間の設定については、後述の「（３）動作例」の欄で説明する。送信制御部２２１は、検知部２２３が滞在判定モードで人９の存在を検知した場合、滞在判定時間中、滞在検知信号を送信部２５１から送信させる。 In the stay detection mode, the detection unit 223 compares the amplitude A2 of the output signal S2 with the second detection threshold Vth22. The detection unit 223 determines whether or not the duration of the state in which the amplitude A2 of the output signal S2 is less than the second detection threshold Vth22 exceeds the stay determination time. When the state in which the amplitude A2 of the output signal S2 is lower than the second detection threshold Vth22 continues the stay determination time, the detection unit 223 withdraws the person 9 from the detection range 92 (the person 9 does not exist in the detection range 92) It is determined that In other words, the detection unit 223 detects that the person 9 stays in the detection range 92 during the stay determination time after the amplitude A2 of the output signal S2 lastly exceeds the second detection threshold Vth22 (a person in the detection range 92 It is determined that 9 exists. The count value of the stay determination time is reset each time the amplitude A2 of the output signal S2 exceeds the second detection threshold Vth22. The value of the stay determination time is variable, and is set to, for example, 1 minute, 3 minutes, 5 minutes, 10 minutes, etc. by the main unit 1. The setting of the stay determination time in the slave unit 2 will be described in the section of “(3) Operation example” described later. When the detection unit 223 detects the presence of the person 9 in the stay determination mode, the transmission control unit 221 causes the transmission unit 251 to transmit a stay detection signal during the stay determination time.
　検知部２２３は、複数の通信端末３（親機１、子機２）の全てが、対応する検知範囲に人９が不在であると判定した場合、動作モードを滞在検知モードから進入検知モードに切り替える。 If the detection unit 223 determines that all of the plurality of communication terminals 3 (the base unit 1 and the handset 2) are absent from the corresponding detection range, the operation mode changes from the stay detection mode to the entry detection mode. Switch.
　本実施形態では、第１検知閾値Ｖｔｈ２１と第２検知閾値Ｖｔｈ２２とを同じ値としているが、互いに異なる値であってもよい。また、子機２における第１検知閾値Ｖｔｈ２１は、親機１における第１検知閾値Ｖｔｈ１１と同じ値であってもよいし、異なる値であってもよい。また、子機２における第２検知閾値Ｖｔｈ２２は、親機１における第２検知閾値Ｖｔｈ１２と同じ値であってもよいし、異なる値であってもよい。 In the present embodiment, the first detection threshold Vth21 and the second detection threshold Vth22 have the same value, but may have different values. Further, the first detection threshold Vth21 in the slave unit 2 may be the same value as the first detection threshold Vth11 in the master unit 1, or may be a different value. In addition, the second detection threshold Vth22 in the slave unit 2 may be the same value as the second detection threshold Vth12 in the master unit 1, or may be a different value.
　（３）動作例
　次に、本実施形態の通信システム３０の動作例について説明する。 (3) Operation Example Next, an operation example of the communication system 30 of the present embodiment will be described.
　（３．１）第１動作例
　まず、通信システム３０の第１動作例について図４を参照して説明する。 (3.1) First Operation Example First, a first operation example of the communication system 30 will be described with reference to FIG.
　本実施形態の通信システム３０において、各通信端末３（親機１、子機２）は、同期通信を行うように構成されている。各通信端末３が同期をとるために、親機１は同期信号を子機２に送信する。この同期信号は、信号レベルが２値間で周期的に切り替わる信号である。具体的には、同期信号は、一対の電線４１，４２間の電圧の電圧値が信号レベルであって、２値である第１電圧値Ｖ１（第１信号レベル）と第２電圧値Ｖ２（第２信号レベル）との間で周期的に変化する。同期信号は、一対の電線４１，４２間の電圧の電圧値が第２電圧値Ｖ２となるパルスが周期的に発生する。 In the communication system 30 of the present embodiment, each communication terminal 3 (master unit 1, slave unit 2) is configured to perform synchronous communication. In order for each communication terminal 3 to synchronize, master device 1 transmits a synchronization signal to slave device 2. The synchronization signal is a signal whose signal level periodically switches between two values. Specifically, in the synchronization signal, the voltage value of the voltage between the pair of electric wires 41 and 42 is a signal level, and the first voltage value V1 (first signal level) and the second voltage value V2 (binary values) And periodically change with the second signal level). The synchronization signal periodically generates a pulse in which the voltage value of the voltage between the pair of electric wires 41 and 42 is the second voltage value V2.
　親機１の送信制御部１２１は、周期的にスイッチＳＷ１１をオンすることにより、一対の電線４１，４２間の電圧値を第１電圧値Ｖ１から第２電圧値Ｖ２に変化させる。つまり、スイッチＳＷ１１がオンしている時間Ｔ２が、同期信号のパルス幅となる。この時間Ｔ２は、例えば５０ｍｓである。 The transmission control unit 121 of the parent device 1 changes the voltage value between the pair of electric wires 41 and 42 from the first voltage value V1 to the second voltage value V2 by periodically turning on the switch SW11. That is, the time T2 during which the switch SW11 is on is the pulse width of the synchronization signal. This time T2 is 50 ms, for example.
　子機２の受信制御部２２２は、一対の電線４１，４２間の電圧の電圧値の第１電圧値Ｖ１から第２電圧値Ｖ２への変化をトリガとして、同期をとる。 The reception control unit 222 of the slave 2 synchronizes using the change from the first voltage value V1 to the second voltage value V2 as a trigger of the voltage value of the voltage between the pair of electric wires 41 and 42.
　送信制御部１２１は、同期信号の周期Ｔ１を、子機２に伝達する情報に応じて変調する。周期Ｔ１は、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１と第２電圧値Ｖ２との間で切り替わる周期である。つまり、送信制御部１２１は、同期信号の周期Ｔ１を、子機２に伝達する情報に対応した時間長に設定する。本実施形態では、子機２に伝達する情報は、設定情報及び点灯情報である。設定情報とは、子機２に設定する滞在判定時間の値（例えば、１分、３分、５分、１０分等）を示している。点灯情報は、照明器具８１が点灯中であるか消灯中であるかを示している。設定情報（滞在判定時間）と点灯情報（点灯状態、消灯状態）との複数の組合せが、周期Ｔ１の複数の時間長と一対一に対応付けられている。設定情報と点灯情報との複数の組み合わせに対応する周期Ｔ１の複数の時間長は、互いに異なっている。設定情報と点灯情報との複数の組み合わせと、周期Ｔ１の複数の時間長とが対応付けられたデータは、記憶部１２０に格納されている。記憶部１２０は、例えばＲＯＭ（Read Only Memory）、ＥＥＰＲＯＭ（Electrically Erasable Programmable Read Only Memory）等の半導体メモリである。 The transmission control unit 121 modulates the cycle T 1 of the synchronization signal according to the information to be transmitted to the slave 2. The cycle T1 is a cycle in which the voltage value of the voltage between the pair of electric wires 41 and 42 is switched between the first voltage value V1 and the second voltage value V2. That is, the transmission control unit 121 sets the period T1 of the synchronization signal to a time length corresponding to the information to be transmitted to the slave 2. In the present embodiment, the information transmitted to the slave 2 is setting information and lighting information. The setting information indicates the value (for example, 1 minute, 3 minutes, 5 minutes, 10 minutes, etc.) of the stay determination time set in the handset 2. The lighting information indicates whether the lighting fixture 81 is on or off. A plurality of combinations of setting information (stay determination time) and lighting information (lighting state, extinguishing state) are associated one-to-one with a plurality of time lengths of cycle T1. The plurality of time lengths of the cycle T1 corresponding to the plurality of combinations of setting information and lighting information are different from each other. Data in which a plurality of combinations of setting information and lighting information are associated with a plurality of time lengths of the cycle T1 is stored in the storage unit 120. The storage unit 120 is a semiconductor memory such as a read only memory (ROM) or an electrically erasable programmable read only memory (EEPROM).
　送信制御部１２１は、設定情報と点灯情報との組み合わせに基づいて、周期Ｔ１の時間長を決定する。 The transmission control unit 121 determines the time length of the cycle T1 based on the combination of the setting information and the lighting information.
　具体的には、図５に示すように、送信制御部１２１は、設定情報を取得する（Ｓ１１）。設定情報は、例えば親機１のメモリに予め登録（格納）されている。親機１のメモリへの設定情報の登録は、例えば親機１と有線／無線で接続された設定器、等によって行われる。送信制御部１２１は、メモリにアクセスして、子機２に設定する滞在判定時間が、例えば１分、３分、５分、１０分のいずれであるかの情報（設定情報）を取得する。なお、送信制御部１２１は、親機１に設けられたディップスイッチから設定情報を取得するように構成されていてもよい。 Specifically, as shown in FIG. 5, the transmission control unit 121 acquires setting information (S11). The setting information is registered (stored) in advance in, for example, the memory of the parent device 1. The registration of setting information in the memory of the parent device 1 is performed by, for example, a setting device connected to the parent device 1 by wire or wirelessly. The transmission control unit 121 accesses the memory, and acquires information (setting information) indicating whether the stay determination time set in the handset 2 is one minute, three minutes, five minutes, or ten minutes, for example. The transmission control unit 121 may be configured to acquire setting information from a dip switch provided in the parent device 1.
　次に、送信制御部１２１は、点灯情報を取得する（Ｓ１２）。送信制御部１２１は、判定部１２４から判定結果を取得することにより、点灯情報を取得する。上述したように、制御装置８２は、判定部１２４の判定結果が「不在状態」であれば照明器具８１を消灯させ、判定部１２４の判定結果が「存在状態」であれば照明器具８１を点灯させる。つまり、判定部１２４の判定結果と照明器具８１の状態とが対応している。送信制御部１２１は、判定部１２４の判定結果が「存在状態」であれば照明器具８１が点灯中であると判断し、判定部１２４の判定結果が「不在状態」であれば照明器具８１が消灯中であると判断する。このように、送信制御部１２１は、判定部１２４の判定結果を取得することにより、照明器具８１が点灯中と消灯中のいずれであるかの情報（点灯情報）を取得する。なお、送信制御部１２１は、制御装置８２から点灯情報を取得するように構成されていてもよい。 Next, the transmission control unit 121 acquires lighting information (S12). The transmission control unit 121 acquires lighting information by acquiring the determination result from the determination unit 124. As described above, the control device 82 turns off the luminaire 81 if the determination result of the determination unit 124 is "absent state", and turns on the luminaire 81 if the determination result of the determination unit 124 is "presence state" Let That is, the determination result of the determination unit 124 corresponds to the state of the lighting fixture 81. The transmission control unit 121 determines that the lighting fixture 81 is on if the determination result of the determination unit 124 is the "presence state", and if the determination result of the determination unit 124 is the "not present state" It is determined that the light is off. As described above, the transmission control unit 121 acquires the determination result of the determination unit 124 to acquire information (lighting information) indicating whether the lighting apparatus 81 is on or off. The transmission control unit 121 may be configured to obtain lighting information from the control device 82.
　次に、送信制御部１２１は、取得した設定情報と点灯情報とに基づいて、同期信号の周期Ｔ１の時間長を決定する（Ｓ１３）。送信制御部１２１は、記憶部１２０にアクセスして、取得した設定情報と点灯情報との組み合わせに対応する周期Ｔ１の時間長のデータを取得する。 Next, the transmission control unit 121 determines the time length of the cycle T1 of the synchronization signal based on the acquired setting information and lighting information (S13). The transmission control unit 121 accesses the storage unit 120, and acquires data with a time length of period T1 corresponding to the combination of the acquired setting information and lighting information.
　送信制御部１２１は、同期信号の周期Ｔ１の時間長が、ステップＳ１３で決定（取得）した時間長となるように、送信部１４１から同期信号を送信させる（Ｓ１４）。送信制御部１２１は、設定情報に変更が生じた場合（Ｓ１５：Ｙｅｓ）、設定情報を再取得する（Ｓ１１）。送信制御部１２１は、点灯情報に変更が生じた場合（Ｓ１６：Ｙｅｓ）、点灯情報を再取得する（Ｓ１２）。送信制御部１２１は、設定情報及び点灯情報に変更がない場合（Ｓ１５：Ｎｏ、Ｓ１６：Ｎｏ）、周期Ｔ１の時間長を維持したまま同期信号の送信を継続させる（Ｓ１４）。 The transmission control unit 121 causes the transmission unit 141 to transmit the synchronization signal so that the time length of the cycle T1 of the synchronization signal becomes the time length determined (acquired) in step S13 (S14). When a change occurs in the setting information (S15: Yes), the transmission control unit 121 reacquires the setting information (S11). When a change occurs in the lighting information (S16: Yes), the transmission control unit 121 reacquires the lighting information (S12). When the setting information and the lighting information are not changed (S15: No, S16: No), the transmission control unit 121 continues the transmission of the synchronization signal while maintaining the time length of the cycle T1 (S14).
　子機２の受信制御部２２２は、同期信号の周期Ｔ１の時間長を計測することにより、親機１からの設定情報及び点灯情報を受け取る。具体的には、受信制御部２２２は、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第２電圧値Ｖ２へ変化してから、次に一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第２電圧値Ｖ２へ変化するまでの時間を計測する。また、子機２は、親機１と同様に、設定情報と点灯情報との複数の組み合わせと、周期Ｔ１の複数の時間長とが対応付けられたデータを格納した記憶部２２０を備えている。記憶部２２０は、例えばＲＯＭ（Read Only Memory）、ＥＥＰＲＯＭ（Electrically Erasable Programmable Read Only Memory）等の半導体メモリである。受信制御部２２２は、記憶部２２０にアクセスして、計測した同期信号の周期Ｔ１の時間長に対応する設定情報及び点灯情報を取得する。 The reception control unit 222 of the slave 2 receives the setting information and the lighting information from the master 1 by measuring the time length of the cycle T1 of the synchronization signal. Specifically, after the voltage value of the voltage between the pair of electric wires 41 and 42 is changed from the first voltage value V1 to the second voltage value V2, the reception control unit 222 then operates between the pair of electric wires 41 and 42 next. The time until the voltage value of the voltage changes from the first voltage value V1 to the second voltage value V2 is measured. Further, similarly to the base unit 1, the handset 2 includes the storage unit 220 that stores data in which a plurality of combinations of setting information and lighting information are associated with a plurality of time lengths of the cycle T1. . The storage unit 220 is, for example, a semiconductor memory such as a read only memory (ROM) or an electrically erasable programmable read only memory (EEPROM). The reception control unit 222 accesses the storage unit 220, and acquires setting information and lighting information corresponding to the measured time length of the cycle T1 of the synchronization signal.
　検知部２２３は、滞在検知モードで用いる滞在判定時間の値を、受信制御部２２２が取得した設定情報が示す滞在判定時間の値に設定する。 The detection unit 223 sets the value of the stay determination time used in the stay detection mode to the value of the stay determination time indicated by the setting information acquired by the reception control unit 222.
　また、検知部２２３は、受信制御部２２２が取得した点灯情報が、照明器具８１の点灯中であれば動作モードを滞在検知モードにし、照明器具８１が消灯中であれば動作モードを進入検知モードにする。 If the lighting information acquired by the reception control unit 222 indicates that the lighting fixture 81 is on, the detection unit 223 sets the operation mode to stay detection mode, and if the lighting fixture 81 is on, the operation mode is entry detection mode Make it
　このように、本実施形態の通信システム３０では、親機１が送信する同期信号の周期Ｔ１の時間長が、親機１から子機２に伝達する情報に対応している。したがって、親機１と子機２との間の信号の簡略化を図ることができる。 As described above, in the communication system 30 of the present embodiment, the time length of the cycle T1 of the synchronization signal transmitted by the master unit 1 corresponds to the information transmitted from the master unit 1 to the slave unit 2. Therefore, the signal between the master unit 1 and the slave unit 2 can be simplified.
　（３．２）第２動作例
　次に、通信システム３０の第２動作例について図６、及び図７を参照して説明する。 (3.2) Second Operation Example Next, a second operation example of the communication system 30 will be described with reference to FIG. 6 and FIG.
　ここでは、照明器具８１が消灯中であって、複数の通信端末３（親機１、子機２）のうち子機２Ａが進入検知モードで人９の存在を検知した場合を想定する。 Here, it is assumed that the luminaire 81 is in the extinguishing state and the handset 2A among the plurality of communication terminals 3 (the base unit 1 and the handset 2) detects the presence of the person 9 in the entry detection mode.
　親機１の送信制御部１２１は、周期Ｔ１の時間長がＴ１１である同期信号を送信部１４１から送信させる。時間長Ｔ１１は、設定情報である滞在判定時間Ｔ５（図７参照）が３分、点灯情報である照明器具８１の点灯状態が消灯中であることを示している。子機２Ａは、同期信号の周期Ｔ１の時間長Ｔ１１を計測することにより、滞在判定時間Ｔ５を３分に設定し、動作モードを進入検知モードとする。 The transmission control unit 121 of the parent device 1 causes the transmission unit 141 to transmit a synchronization signal in which the time length of the cycle T1 is T11. The time length T11 indicates that the stay determination time T5 (see FIG. 7) which is the setting information is 3 minutes, and the lighting state of the lighting fixture 81 which is the lighting information is in the extinguishing state. The slave unit 2A sets the stay determination time T5 to 3 minutes by measuring the time length T11 of the cycle T1 of the synchronization signal, and sets the operation mode to the entry detection mode.
　時点ｔ１において、出力信号Ｓ２の振幅Ａ２が第１検知閾値Ｖｔｈ２１以上となり、子機２Ａの検知部２２３は、検知範囲９２に人９が進入した（検知範囲９２に人９が存在する）と判定する。検知部２２３は、進入検知モードで人９の存在を検知したことにより、動作モードを進入検知モードから滞在検知モードに切り替える。 At time t1, the amplitude A2 of the output signal S2 becomes equal to or greater than the first detection threshold Vth21, and the detection unit 223 of the handset 2A determines that the person 9 has entered the detection range 92 (the person 9 is present in the detection range 92) Do. The detection unit 223 switches the operation mode from the entry detection mode to the stay detection mode by detecting the presence of the person 9 in the entry detection mode.
　また、子機２Ａの送信制御部２２１は、検知部２２３が進入検知モードで人９の存在を検知したことにより、送信部２５１から進入検知信号を送信させる。具体的には、送信制御部２２１は、同期信号に基づいて設定された１つのタイムスロットＴｓにおいて、進入検知信号を送信する。 Further, the transmission control unit 221 of the handset 2A causes the transmission unit 251 to transmit an entry detection signal when the detection unit 223 detects the presence of the person 9 in the entry detection mode. Specifically, the transmission control unit 221 transmits an entrance detection signal in one time slot Ts set based on the synchronization signal.
　進入検知信号は、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第３電圧値Ｖ３に変化するパルス信号（電圧信号）である。進入検知信号のパルス幅Ｔ４１は、所定の閾値時間よりも長い値である。進入検知信号のパルス幅Ｔ４１は、例えば１００ｍｓである。後述する滞在検知信号は、進入検知信号と同様に、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第３電圧値Ｖ３に変化するパルス信号（電圧信号）である。滞在検知信号のパルス幅Ｔ４２は、所定の閾値時間よりも短い値である。滞在検知信号のパルス幅Ｔ４２は、例えば２０ｍｓである。 The entry detection signal is a pulse signal (voltage signal) in which the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the third voltage value V3. The pulse width T41 of the approach detection signal is a value longer than a predetermined threshold time. The pulse width T41 of the entry detection signal is, for example, 100 ms. The stay detection signal described later is a pulse signal (voltage signal) in which the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the third voltage value V3 as in the case of the entry detection signal. The pulse width T42 of the stay detection signal is a value shorter than a predetermined threshold time. The pulse width T42 of the stay detection signal is, for example, 20 ms.
　タイムスロットＴｓは、同期信号により一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第２電圧値Ｖ２へ変化してから時間Ｔ３後を始点とする所定期間である。同期信号の１周期に１つのタイムスロットＴｓが発生する。親機１の受信制御部１２２は、タイムスロットＴｓにおいて進入検知信号、滞在検知信号を受信する。具体的には、受信制御部１２２は、タイムスロットＴｓにおいて、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第３電圧値Ｖ３に変化した場合、一対の電線４１，４２間の電圧の電圧値が第３電圧値Ｖ３である時間を計測する。受信制御部１２２は、計測した時間が閾値時間より長い場合、子機２から送信されたデータ信号が進入検知信号であると判定する。また、受信制御部１２２は、計測した時間が閾値時間よりも短い場合、子機２から送信されたデータ信号が滞在検知信号であると判定する。 The time slot Ts is a predetermined period starting from time T3 after the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the second voltage value V2 by the synchronization signal. One time slot Ts occurs in one cycle of the synchronization signal. The reception control unit 122 of the base unit 1 receives an approach detection signal and a stay detection signal in the time slot Ts. Specifically, when the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the third voltage value V3 in the time slot Ts, the reception control unit 122 performs the pair of electric wires 41, The time when the voltage value of the voltage between 42 is the third voltage value V3 is measured. If the measured time is longer than the threshold time, the reception control unit 122 determines that the data signal transmitted from the handset 2 is an entry detection signal. Further, when the measured time is shorter than the threshold time, the reception control unit 122 determines that the data signal transmitted from the handset 2 is a stay detection signal.
　子機２Ａの送信制御部２２１は、検知部２２３が進入検知モードで人９の存在を検知した後のタイムスロットＴｓにおいて、タイムスロットＴｓの始点から時間Ｔ４１だけスイッチＳＷ２１をオンすることにより、送信部２５１から進入検知信号を送信させる。 The transmission control unit 221 of the slave unit 2A performs transmission by turning on the switch SW21 for a time T41 from the start point of the time slot Ts in the time slot Ts after the detection unit 223 detects the presence of the person 9 in the entry detection mode. An entry detection signal is transmitted from the unit 251.
　親機１の判定部１２４は、受信制御部１２２が進入検知信号を受信すると、所定の進入判定時間の間は検知空間９０の状態が存在状態である、と判定する。判定部１２４は、出力部１５を介して判定結果を制御装置８２に出力する。制御装置８２は、判定部１２４の判定結果に基づいて、照明器具８１を点灯させる（時点ｔ２）。 When the reception control unit 122 receives the entry detection signal, the determination unit 124 of the base unit 1 determines that the state of the detection space 90 is in the existing state during a predetermined entry determination time. The determination unit 124 outputs the determination result to the control device 82 via the output unit 15. The control device 82 lights the lighting fixture 81 based on the determination result of the determination unit 124 (at time t2).
　親機１の検知部１２３は、判定部１２４の判定結果に基づいて、動作モードを進入検知モードから滞在検知モードに切り替える。 Based on the determination result of the determination unit 124, the detection unit 123 of the base unit 1 switches the operation mode from the entry detection mode to the stay detection mode.
　親機１の送信制御部１２１は、判定部１２４の判定結果に基づいて、同期信号の周期Ｔ１の時間長をＴ１１からＴ１２に変更する。時間長Ｔ１２は、設定情報である滞在判定時間Ｔ５が３分、点灯情報である照明器具８１の点灯状態が点灯中であることを示している。子機２Ｂ，２Ｃは、同期信号の周期Ｔ１の時間長Ｔ１２を計測することにより、検知部２２３の動作モードを進入検知モードから滞在検知モードに切り替える。 Transmission control section 121 of base unit 1 changes the time length of period T1 of the synchronization signal from T11 to T12 based on the determination result of determination section 124. The time length T12 indicates that the stay determination time T5 which is setting information is 3 minutes, and the lighting state of the lighting fixture 81 which is lighting information is on. The slave units 2B and 2C switch the operation mode of the detection unit 223 from the entry detection mode to the stay detection mode by measuring the time length T12 of the cycle T1 of the synchronization signal.
　時点ｔ１以降において、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２以上となり、子機２Ａの検知部２２３は、検知範囲９２に人９が滞在している、と判定する。検知部２２３が滞在検知モードで人９の存在を検知すると、送信制御部２２１は、タイムスロットＴｓにおいて、タイムスロットＴｓの始点から時間Ｔ４２だけスイッチＳＷ２１をオンすることにより、送信部２５１から滞在検知信号を送信させる。 After time t1, the amplitude A2 of the output signal S2 becomes equal to or greater than the second detection threshold Vth22, and the detection unit 223 of the handset 2A determines that the person 9 is staying in the detection range 92. When the detection unit 223 detects the presence of the person 9 in the stay detection mode, the transmission control unit 221 detects stay from the transmission unit 251 by turning on the switch SW 21 for only the time T42 from the start point of the time slot Ts in the time slot Ts. Send a signal.
　親機１の判定部１２４は、受信制御部１２２が進入検知信号を受信してから進入判定時間後において、受信制御部１２２が滞在検知信号を受信している場合、検知空間９０の状態が存在状態であると判定する。判定部１２４は、受信制御部１２２が滞在検知信号を受信している間は、検知空間９０の状態が存在状態であると判定する。つまり、進入判定時間後において受信制御部１２２が滞在検知信号を受信している間は、照明器具８１の点灯が継続される。 If the reception control unit 122 receives the stay detection signal after the entry determination time after the reception control unit 122 receives the entry detection signal, the determination unit 124 of the parent device 1 has the state of the detection space 90 It determines that it is a state. While the reception control unit 122 receives the stay detection signal, the determination unit 124 determines that the state of the detection space 90 is in the existing state. That is, lighting of the lighting fixture 81 is continued while the reception control unit 122 receives the stay detection signal after the entry determination time.
　検知部２２３は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を最後に上回った時点ｔ３から滞在判定時間Ｔ５の間は、検知範囲９２に人９が滞在している、と判定する。なお、滞在判定時間Ｔ５のカウントの開始は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を下回った時点でもよい。送信制御部２２１は、滞在判定時間Ｔ５中、滞在検知信号の送信を継続させる（図７参照）。検知部２２３は、出力信号Ｓ２の振幅Ａ２が第２検知閾値Ｖｔｈ２２を下回っている状態の継続時間が、滞在判定時間Ｔ５を超えた時点ｔ４において、検知範囲９２から人９が退出した（検知範囲９２に人９が存在しない）と判定する。送信制御部２２１は、検知部２２３が検知範囲９２に人９が存在しないと判定すると、滞在検知信号の送信を停止する。 The detection unit 223 determines that the person 9 is staying in the detection range 92 during a stay determination time T5 from time t3 when the amplitude A2 of the output signal S2 finally exceeds the second detection threshold Vth22. The start of the count of the stay determination time T5 may be when the amplitude A2 of the output signal S2 falls below the second detection threshold Vth22. The transmission control unit 221 continues transmission of the stay detection signal during the stay determination time T5 (see FIG. 7). The detection unit 223 detects that the person 9 has left the detection range 92 at time t4 when the duration of the state in which the amplitude A2 of the output signal S2 is lower than the second detection threshold Vth22 exceeds the stay determination time T5 (detection range It is determined that the person 9 does not exist in 92). When the detection unit 223 determines that the person 9 is not present in the detection range 92, the transmission control unit 221 stops the transmission of the stay detection signal.
　親機１の受信制御部１２２は、タイムスロットＴｓにおいて滞在検知信号を受信できない状態が所定時間（例えば５秒）継続すると、滞在検知信号の送信が停止されたと判定する。判定部１２４は、受信制御部１２２が、滞在検知信号の送信が停止されたと判定すると、検知空間９０の状態が不在状態である、と判定する。判定部１２４は、出力部１５を介して判定結果を制御装置８２に出力する。制御装置８２は、判定部１２４の判定結果に基づいて、照明器具８１を消灯させる（時点ｔ５）。 The reception control unit 122 of the base unit 1 determines that the transmission of the stay detection signal is stopped when the state in which the stay detection signal can not be received in the time slot Ts continues for a predetermined time (for example, 5 seconds). When the reception control unit 122 determines that the transmission of the stay detection signal is stopped, the determination unit 124 determines that the state of the detection space 90 is an absent state. The determination unit 124 outputs the determination result to the control device 82 via the output unit 15. The control device 82 turns off the lighting device 81 based on the determination result of the determination unit 124 (at time t5).
　親機１の送信制御部１２１は、判定部１２４の判定結果に基づいて、同期信号の周期Ｔ１の時間長をＴ１２からＴ１１に変更する。子機２Ａ，２Ｂ，２Ｃの検知部２２３は、同期信号の周期Ｔ１の時間長Ｔ１１を計測することにより、動作モードを滞在検知モードから進入検知モードに切り替える。また、親機１の検知部１２３は、判定部１２４の判定結果に基づいて、動作モードを滞在検知モードから進入検知モードに切り替える。 Transmission control section 121 of base unit 1 changes the time length of period T1 of the synchronization signal from T12 to T11 based on the determination result of determination section 124. The detection unit 223 of the slaves 2A, 2B, 2C switches the operation mode from the stay detection mode to the entry detection mode by measuring the time length T11 of the cycle T1 of the synchronization signal. Further, based on the determination result of the determination unit 124, the detection unit 123 of the parent device 1 switches the operation mode from the stay detection mode to the entry detection mode.
　上述した動作例では、３台の子機２のうち子機２Ａが人９の存在を検知した場合について説明したが、子機２Ｂ，２Ｃが人９の存在を検知した場合も同様の動作が行われる。 In the operation example described above, although the case where the handset 2A of the three handsets 2 detects the presence of the person 9 has been described, the same operation is performed when the handsets 2B and 2C detect the presence of the person 9 To be done.
　また、タイムスロットＴｓは、子機２Ａ，２Ｂ，２Ｃで共通である。つまり、子機２Ａ，２Ｂ，２Ｃは、共通の１つのタイムスロットＴｓにおいて進入検知信号、滞在検知信号を送信する。例えば、子機２Ａ，２Ｂ，２Ｃそれぞれの検知部２２３が、滞在検知モードで人９の存在を検知した場合を想定する。 The time slot Ts is common to the slaves 2A, 2B and 2C. That is, the slaves 2A, 2B, 2C transmit an approach detection signal and a stay detection signal in one common time slot Ts. For example, it is assumed that the detection unit 223 of each of the slaves 2A, 2B, and 2C detects the presence of the person 9 in the stay detection mode.
　図８に示すように、子機２Ａ，２Ｂは、それぞれの検知部２２３が滞在検知モードで人９の存在を検知している。子機２Ａ，２Ｂそれぞれの送信制御部２２１は、同期信号に基づいて設定されるタイムスロットＴｓにおいて、タイムスロットＴｓの始点から時間Ｔ４２だけスイッチＳＷ２１をオンすることにより、滞在検知信号を送信する。つまり、子機２ＡのスイッチＳＷ２１と、子機２ＢのスイッチＳＷ２１とが、同じタイミングでオンされる。 As shown in FIG. 8, in each of the slaves 2A and 2B, each of the detection units 223 detects the presence of the person 9 in the stay detection mode. The transmission control unit 221 of each of the slave units 2A and 2B transmits a stay detection signal by turning on the switch SW21 for a time T42 from the start point of the time slot Ts in the time slot Ts set based on the synchronization signal. That is, the switch SW21 of the handset 2A and the switch SW21 of the handset 2B are turned on at the same timing.
　また、図８に示す例では、子機２Ｃの検知部２２３は、子機２Ａ，２Ｂよりも後のタイミングにおいて、滞在検知モードで人９の存在を検知している。子機２Ａ，２Ｂと同様に、子機２Ｃの送信制御部２２１は、タイムスロットＴｓの始点から時間Ｔ４２だけスイッチＳＷ２１をオンすることにより、滞在検知信号を送信する。つまり、子機２Ａ，２Ｂ，２ＣそれぞれのスイッチＳＷ２１が同じタイミングでオンされる。 Further, in the example illustrated in FIG. 8, the detection unit 223 of the handset 2C detects the presence of the person 9 in the stay detection mode at a timing after the handsets 2A and 2B. Similar to the slave units 2A and 2B, the transmission control unit 221 of the slave unit 2C transmits a stay detection signal by turning on the switch SW21 for a time T42 from the start point of the time slot Ts. That is, the switches SW21 of the slaves 2A, 2B, 2C are turned on at the same timing.
　このように、本実施形態では、複数の子機２に対して、共通の１つのタイムスロットＴｓが割り当てられている。したがって、複数の子機２に対して互いに異なるタイムスロットを割り当てる必要がなく、子機２の台数が増えた場合であっても、同期信号の周期Ｔ１の冗長化を抑制することができる。 As described above, in the present embodiment, one common time slot Ts is allocated to the plurality of handsets 2. Therefore, it is not necessary to assign different time slots to a plurality of handsets 2, and even if the number of handsets 2 is increased, it is possible to suppress the redundancy of the period T1 of the synchronization signal.
　また、複数の子機２のそれぞれが人９の存在を検知した場合であっても、複数の子機２が同じタイミングで滞在検知信号を送信する。したがって、一対の電線４１，４２間の電圧が第１電圧値Ｖ１及び第２電圧値Ｖ２よりも低い第３電圧値Ｖ３となる期間が制限され、一対の電線４１，４２に流れる電流（子機２の消費電流）の平均値を抑制することができる。 Further, even when each of the plurality of handsets 2 detects the presence of the person 9, the plurality of handsets 2 transmit the stay detection signal at the same timing. Therefore, the period in which the voltage between the pair of wires 41 and 42 is the third voltage value V3 lower than the first voltage value V1 and the second voltage value V2 is limited, and the current flowing through the pair of wires 41 and 42 The average value of the current consumption of 2) can be suppressed.
　（３．３）第３動作例
　次に、通信システム３０の第３動作例について図９を参照して説明する。 (3.3) Third Operation Example Next, a third operation example of the communication system 30 will be described with reference to FIG.
　ここでは、照明器具８１が消灯中であって、複数の通信端末３（親機１、子機２）のうち親機１が進入検知モードで人９の存在を検知した場合を想定する。 Here, it is assumed that the lighting apparatus 81 is turned off and the base unit 1 detects the presence of the person 9 in the entry detection mode among the plurality of communication terminals 3 (the base unit 1 and the handset 2).
　親機１の送信制御部１２１は、判定部１２４の判定結果が「不在状態」であるので、周期Ｔ１の時間長がＴ１１である同期信号を送信部１４１から送信させる。 The transmission control unit 121 of the parent device 1 causes the transmission unit 141 to transmit a synchronization signal whose period T1 has a time length of T11, since the determination result of the determination unit 124 is "absent state".
　時点ｔ６において、出力信号Ｓ１の振幅Ａ１が第１検知閾値Ｖｔｈ１１以上となり、親機１の検知部１２３は、検知範囲９１に人９が進入した（検知範囲９１に人９が存在する）と判定する。判定部１２４は、検知部１２３が人９の進入を検知したことにより、所定の進入判定時間の間は検知空間９０の状態が存在状態である、と判定する。判定部１２４は、出力部１５を介して判定結果を制御装置８２に出力する。制御装置８２は、判定部１２４の判定結果に基づいて、照明器具８１を点灯させる。また、検知部１２３は、進入検知モードで人９の存在を検知したことにより、動作モードを進入検知モードから滞在検知モードに切り替える。 At time t6, the amplitude A1 of the output signal S1 is equal to or greater than the first detection threshold Vth11, and the detection unit 123 of the parent device 1 determines that the person 9 has entered the detection range 91 (the person 9 is present in the detection range 91) Do. The determination unit 124 determines that the state of the detection space 90 is in the existing state during a predetermined entry determination time because the detection unit 123 detects the entry of the person 9. The determination unit 124 outputs the determination result to the control device 82 via the output unit 15. The control device 82 lights the lighting fixture 81 based on the determination result of the determination unit 124. Further, the detection unit 123 switches the operation mode from the entry detection mode to the stay detection mode by detecting the presence of the person 9 in the entry detection mode.
　送信制御部１２１は、判定部１２４の判定結果に基づいて、同期信号の周期Ｔ１の時間長をＴ１１からＴ１２に変更する。 The transmission control unit 121 changes the time length of the period T1 of the synchronization signal from T11 to T12 based on the determination result of the determination unit 124.
　また、送信制御部１２１は、検知部１２３が進入検知モードで人９の存在を検知した後のタイムスロットＴｓにおいて、タイムスロットＴｓの始点から時間Ｔ４１だけスイッチＳＷ１２をオンすることにより、送信部１４１から進入検知信号を送信させる。 In addition, the transmission control unit 121 turns on the switch SW12 for only the time T41 from the start point of the time slot Ts in the time slot Ts after the detection unit 123 detects the presence of the person 9 in the entry detection mode. Send an entry detection signal from.
　時点ｔ６以降において、出力信号Ｓ１の振幅Ａ１が第２検知閾値Ｖｔｈ１２以上となり、親機１の検知部１２３は、検知範囲９１に人９が滞在している、と判定する。検知部１２３が滞在検知モードで人９の存在を検知すると、送信制御部１２１は、タイムスロットＴｓにおいて、タイムスロットＴｓの始点から時間Ｔ４２だけスイッチＳＷ１２をオンすることにより、送信部２５１から滞在検知信号を送信させる。 After time t6, the amplitude A1 of the output signal S1 becomes equal to or greater than the second detection threshold Vth12, and the detection unit 123 of the base unit 1 determines that the person 9 stays in the detection range 91. When the detection unit 123 detects the presence of the person 9 in the stay detection mode, the transmission control unit 121 detects stay from the transmission unit 251 by turning on the switch SW 12 for only time T42 from the start point of the time slot Ts in time slot Ts. Send a signal.
　子機２の受信制御部２２２は、タイムスロットＴｓにおいて親機１からの進入検知信号、滞在検知信号を受信する。 The reception control unit 222 of the slave 2 receives an entry detection signal and a stay detection signal from the master 1 in the time slot Ts.
　このように、本実施形態の通信システム３０では、各通信端末３（親機１、子機２）が人９の存在を検知した場合、進入検知信号あるいは滞在検知信号を送信する。これにより、複数の通信端末３（親機１、子機２）のうちいずれか少なくとも１台の通信端末３が、人９の存在を検知した場合、各通信端末３で、人９が存在するという情報が共有化することができる。上述した例では、親機１の判定部１２４の判定結果（点灯情報）に基づいて、親機１の検知部１２３、及び子機２の検知部２２３は、動作モードを決定したが、これに限らない。親機１の検知部１２３は、親機１が滞在検知信号を送信又は受信している場合、動作モードを滞在検知モードとし、滞在検知信号の送信も受信もしていない場合、動作モードを進入検知モードとするように構成されていてもよい。同様に、子機２の検知部２２３は、子機２が滞在検知信号を送信又は受信している場合、動作モードを滞在検知モードとし、滞在検知信号の送信も受信もしていない場合、動作モードを進入検知モードとするように構成されていてもよい。 As described above, in the communication system 30 of the present embodiment, when each communication terminal 3 (the base unit 1 and the handset 2) detects the presence of the person 9, the entry detection signal or the stay detection signal is transmitted. Thus, when at least one communication terminal 3 among the plurality of communication terminals 3 (the base unit 1 and the handset 2) detects the presence of the person 9, the person 9 exists in each of the communication terminals 3 Information can be shared. In the example described above, the detection unit 123 of the base unit 1 and the detection unit 223 of the handset 2 have determined the operation mode based on the determination result (lighting information) of the determination unit 124 of the base unit 1. Not exclusively. When the main unit 1 transmits or receives a stay detection signal, the detection unit 123 of the main unit 1 sets the operation mode to be a stay detection mode, and when neither a transmission nor a reception of a stay detection signal, an operation mode is detected It may be configured to be in a mode. Similarly, when the handset 2 transmits or receives a stay detection signal, the detection unit 223 of the handset 2 sets the operation mode to the stay detection mode, and neither transmits nor receives a stay detection signal, the operation mode. May be configured to be the entry detection mode.
　また、本実施形態の通信システム３０では、親機１が送信する同期信号に基づいて設定されるタイムスロットＴｓにおいて、親機１自身も子機２と同様に進入検知信号、滞在検知信号を送信する。つまり、本実施形態の通信システム３０では、複数の通信端末３（親機１、子機２）に対して共通の１つのタイムスロットＴｓが割り当てられており、各通信端末３（親機１、子機２）は、共通のタイムスロットＴｓで信号の送受信を行う。したがって、複数の通信端末３に対して互いに異なるタイムスロットを割り当てる必要がなく、通信端末３の台数が増えた場合であっても、同期信号の周期Ｔ１の冗長化を抑制することができる。 Further, in the communication system 30 of the present embodiment, in the time slot Ts set based on the synchronization signal transmitted by the master unit 1, the master unit 1 itself transmits the entry detection signal and the stay detection signal as well as the slave unit 2 Do. That is, in the communication system 30 of the present embodiment, one common time slot Ts is allocated to a plurality of communication terminals 3 (base unit 1 and handset 2), and each communication terminal 3 (base unit 1, The slave 2) transmits and receives signals in a common time slot Ts. Therefore, it is not necessary to assign different time slots to a plurality of communication terminals 3, and even when the number of communication terminals 3 is increased, it is possible to suppress the redundancy of the period T1 of the synchronization signal.
　（３．４）第４動作例
　次に、通信システム３０の第４動作例について図１０Ａ、及び図１０Ｂを参照して説明する。なお、図１０Ａでは、複数の通信端末３のうち１台の親機１と１台の子機２のみを図示している。 (3.4) Fourth Operation Example Next, a fourth operation example of the communication system 30 will be described with reference to FIGS. 10A and 10B. In FIG. 10A, only one master unit 1 and one slave unit 2 among the plurality of communication terminals 3 are illustrated.
　各通信端末３（親機１、子機２）は、一対の電線４１，４２に電気的に接続された検査装置から送信される検査信号により、検査モードに移行するように構成されている。検査信号は、所定の周期で一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１と０Ｖとに交互に変化する電圧信号である（図１０Ｂ参照）。各通信端末３は、一対の電線４１，４２を介して検査信号を受信することにより、検査モードに移行する。検査モードでは、通信端末３の各機能が正常に動作するか否かを検査することができる。なお、検査信号の２値の信号レベル（電圧値）は、第１電圧値Ｖ１及び０Ｖに限らず、例えば、第１電圧値Ｖ１、及び第３電圧値Ｖ３よりも低い電圧値であってもよい。 Each communication terminal 3 (master unit 1, slave unit 2) is configured to shift to the inspection mode by an inspection signal transmitted from an inspection device electrically connected to the pair of electric wires 41 and 42. The inspection signal is a voltage signal in which the voltage value of the voltage between the pair of electric wires 41 and 42 alternately changes between the first voltage value V1 and 0 V in a predetermined cycle (see FIG. 10B). Each communication terminal 3 shifts to the inspection mode by receiving the inspection signal via the pair of electric wires 41 and 42. In the inspection mode, it can be inspected whether or not each function of the communication terminal 3 operates normally. The binary signal level (voltage value) of the inspection signal is not limited to the first voltage value V1 and 0 V, and may be a voltage value lower than the first voltage value V1 and the third voltage value V3, for example. Good.
　（３．５）第５動作例
　次に、通信システム３０の第５動作例について説明する。 (3.5) Fifth Operation Example Next, a fifth operation example of the communication system 30 will be described.
　子機２は、親機１が同期信号の送信を一定時間停止すると、点検モードに移行するように構成されている。子機２は、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１である状態が、一定時間継続すると、点検モードに移行する。親機１は、同期信号の送信を一定時間停止した後、同期信号の送信を再開する。点検モードでは、滞在判定時間が例えば５秒に設定され、子機２が人９の存在を検知すると、照明器具８１が５秒間点灯する。これにより、親機１と子機２との間の通信状態、及び子機２における人検知機能が正常であるか否かを点検することができる。 The slave unit 2 is configured to shift to the inspection mode when the master unit 1 stops transmitting the synchronization signal for a certain period of time. The slave unit 2 shifts to the inspection mode when the state where the voltage value of the voltage between the pair of electric wires 41 and 42 is the first voltage value V1 continues for a fixed time. After stopping transmission of the synchronization signal for a certain period of time, master device 1 resumes transmission of the synchronization signal. In the inspection mode, the stay determination time is set to, for example, 5 seconds, and when the handset 2 detects the presence of the person 9, the lighting fixture 81 is turned on for 5 seconds. Thereby, it is possible to check whether the communication state between the master unit 1 and the slave unit 2 and whether the human detection function in the slave unit 2 is normal or not.
　（４）変形例
　以下に、本実施形態の通信システム３０の変形例について説明する。以下に説明する変形例は、上記の実施形態、あるいは変形例同士を適宜組み合わせて適用可能である。 (4) Modifications Hereinafter, modifications of the communication system 30 of the present embodiment will be described. The modifications described below can be applied by appropriately combining the above-described embodiments or modifications.
　（４．１）第１変形例
　上述した例では、親機１は、同期信号のパルス幅Ｔ２を一定としていたため、周期Ｔ１の時間長に応じて同期信号のデューティも変化していた。デューティは、周期Ｔ１において一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１又は第２電圧値Ｖ２である期間である。本実施形態では、デューティは、周期Ｔ１において、一対の電線４１，４２間の電圧の電圧値が第２電圧値Ｖ２である期間（パルス幅Ｔ２）の割合とする。親機１は、同期信号のデューティ（パルス幅Ｔ２）のみを変調するように構成されていてもよい。親機１は、同期信号の周期Ｔ１を一定とし、パルス幅Ｔ２を、子機２に伝達する情報に対応した時間長に設定する。 (4.1) First Modification In the above-described example, since the master 1 makes the pulse width T2 of the synchronization signal constant, the duty of the synchronization signal also changes according to the time length of the cycle T1. The duty is a period in which the voltage value of the voltage between the pair of electric wires 41 and 42 in the cycle T1 is the first voltage value V1 or the second voltage value V2. In the present embodiment, the duty is a ratio of a period (pulse width T2) in which the voltage value of the voltage between the pair of electric wires 41 and 42 is the second voltage value V2 in the cycle T1. Master device 1 may be configured to modulate only the duty (pulse width T2) of the synchronization signal. The master unit 1 sets the cycle T1 of the synchronization signal constant and sets the pulse width T2 to a time length corresponding to the information to be transmitted to the slave unit 2.
　本変形例の通信システム３０の動作例について図１１を参照して説明する。 An operation example of the communication system 30 of the present modification will be described with reference to FIG.
　ここでは、照明器具８１が消灯中であって、複数の通信端末３（親機１、子機２）のうち親機１が進入検知モードで人９の存在を検知した場合を想定する。 Here, it is assumed that the lighting apparatus 81 is turned off and the base unit 1 detects the presence of the person 9 in the entry detection mode among the plurality of communication terminals 3 (the base unit 1 and the handset 2).
　親機１の送信制御部１２１は、判定部１２４の判定結果が「不在状態」であるので、周期Ｔ１でパルス幅Ｔ２の時間長がＴ２１となる同期信号を送信部１４１から送信させる。パルス幅Ｔ２の時間長Ｔ２１は、設定情報である滞在判定時間が３分、点灯情報である照明器具８１の点灯状態が消灯中であることを示している。子機２は、同期信号のパルス幅Ｔ２の時間長Ｔ２１を計測することにより、滞在判定時間を３分に設定し、動作モードを進入検知モードとする。 The transmission control unit 121 of the parent device 1 causes the transmission unit 141 to transmit a synchronization signal in which the time length of the pulse width T2 is T21 in the cycle T1 because the determination result of the determination unit 124 is "absent state". The time length T21 of the pulse width T2 indicates that the stay determination time which is the setting information is 3 minutes, and the lighting state of the lighting fixture 81 which is the lighting information is being turned off. The slave 2 sets the stay determination time to 3 minutes by measuring the time length T21 of the pulse width T2 of the synchronization signal, and sets the operation mode to the entry detection mode.
　時点ｔ７において、出力信号Ｓ１の振幅Ａ１が第１検知閾値Ｖｔｈ１１以上となり、親機１の検知部１２３は、検知範囲９１に人９が進入した（検知範囲９１に人９が存在する）と判定する。これにより、照明器具８１が点灯する。 At time t7, the amplitude A1 of the output signal S1 is equal to or greater than the first detection threshold Vth11, and the detection unit 123 of the parent device 1 determines that the person 9 has entered the detection range 91 (the person 9 is present in the detection range 91) Do. Thereby, the lighting fixture 81 is turned on.
　そして、送信制御部１２１は、同期信号のパルス幅Ｔ２の時間長をＴ２１からＴ２２に変更する。時間長Ｔ２２は、設定情報である滞在判定時間が３分、点灯情報である照明器具８１の点灯状態が点灯中であることを示している。子機２は、同期信号のパルス幅Ｔ２の時間長Ｔ２２を計測することにより、動作モードを進入検知モードから滞在検知モードに切り替える。 Then, the transmission control unit 121 changes the time length of the pulse width T2 of the synchronization signal from T21 to T22. The time length T22 indicates that the stay determination time as setting information is 3 minutes, and the lighting state of the lighting fixture 81 as lighting information is on. The slave unit 2 switches the operation mode from the entry detection mode to the stay detection mode by measuring the time length T22 of the pulse width T2 of the synchronization signal.
　さらに、送信制御部１２１は、一対の電線４１，４２間の電圧の電圧値が第１電圧値Ｖ１から第２電圧値Ｖ２へ変化してから時間Ｔ３０後を始点とするタイムスロットＴｓにおいて、進入検知信号を送信する。時点ｔ７以降において、出力信号Ｓ１の振幅Ａ１が第２検知閾値Ｖｔｈ１２以上となり、送信制御部１２１は、タイムスロットＴｓにおいて滞在検知信号を送信する。 Furthermore, transmission control unit 121 enters in time slot Ts starting at time T30 after the voltage value of the voltage between the pair of electric wires 41 and 42 changes from the first voltage value V1 to the second voltage value V2. Send a detection signal. After time t7, the amplitude A1 of the output signal S1 becomes equal to or greater than the second detection threshold Vth12, and the transmission control unit 121 transmits a stay detection signal in the time slot Ts.
　本変形例では、親機１は、同期信号のデューティ（パルス幅Ｔ２）のみを変化させているが、これに限らない。親機１は、同期信号の周期Ｔ１とパルス幅Ｔ２との両方を変調しデューティを一定として周期Ｔ１のみを変化させるように構成されていてもよい。 In the present modification, the parent device 1 changes only the duty (pulse width T2) of the synchronization signal, but the present invention is not limited to this. The master unit 1 may be configured to modulate both the period T1 and the pulse width T2 of the synchronization signal so as to make the duty constant and change only the period T1.
　（４．２）その他の変形例
　本開示における親機側制御部１２及び子機側制御部２２は、コンピュータシステムを含んでいる。コンピュータシステムは、ハードウェアとしての１以上のプロセッサ及びメモリを主構成とする。コンピュータシステムのメモリに記録されたプログラムを１以上のプロセッサが実行することによって、本開示における親機側制御部１２及び子機側制御部２２としての機能が実現される。プログラムは、コンピュータシステムのメモリに予め記録されてもよく、電気通信回線を通じて提供されてもよく、コンピュータシステムで読み取り可能なメモリカード、光学ディスク、ハードディスクドライブ等の非一時的記録媒体に記録されて提供されてもよい。コンピュータシステムの１以上のプロセッサの各々は、半導体集積回路（ＩＣ）又は大規模集積回路（ＬＳＩ）を含む１乃至複数の電子回路で構成される。複数の電子回路は、１つのチップに集約されていてもよいし、複数のチップに分散して設けられていてもよい。複数のチップは、１つの装置に集約されていてもよいし、複数の装置に分散して設けられていてもよい。また、親機側制御部１２及び子機側制御部２２の少なくとも一部の機能は、例えば、サーバ又はクラウド（クラウドコンピューティング）等によって実現されてもよい。 (4.2) Other Modifications The base-side controller 12 and the child-side controller 22 in the present disclosure include a computer system. A computer system mainly includes one or more processors and memory as hardware. When one or more processors execute the program recorded in the memory of the computer system, the functions as the base unit control unit 12 and the slave unit control unit 22 in the present disclosure are realized. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunication line, and recorded in a non-transitory recording medium such as a computer system-readable memory card, an optical disc, a hard disk drive, etc. It may be provided. Each of the one or more processors of the computer system is configured with one or more electronic circuits, including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI). The plurality of electronic circuits may be integrated into one chip or may be distributed to a plurality of chips. The plurality of chips may be integrated into one device or may be distributed to a plurality of devices. In addition, at least a part of the functions of the base unit side control unit 12 and the handset side control unit 22 may be realized by, for example, a server or a cloud (cloud computing).
　実施形態では、通信端末３が、検知範囲における動体（人９）の存在を検知する動体検知装置である場合を説明したが、この構成に限らない。例えば、通信端末３は、例えば明るさ、温度などを検知する検知装置であってもよい。なお、通信端末３において、検知機能（センサ機能）は必須の構成ではなく、検知機能が省略されていてもよい。 Although the embodiment describes the case where the communication terminal 3 is a moving body detection device that detects the presence of a moving body (person 9) in the detection range, the present invention is not limited to this configuration. For example, the communication terminal 3 may be, for example, a detection device that detects brightness, temperature, and the like. In addition, in the communication terminal 3, a detection function (sensor function) is not an essential structure, and the detection function may be abbreviate | omitted.
　実施形態では、通信システム３０が照明システム８０を制御する照明制御システムである場合を説明したが、この構成に限らない。例えば、通信システム３０は、負荷機器として空調機器を制御する制御システムであってもよい。なお、通信システム３０は、複数の通信端末３を備えていればよく、負荷機器を制御する機能は必須ではない。 Although the embodiment has described the case where the communication system 30 is a lighting control system that controls the lighting system 80, the present invention is not limited to this configuration. For example, the communication system 30 may be a control system that controls an air conditioner as a load device. In addition, the communication system 30 should just be equipped with the several communication terminal 3, and the function which controls a load apparatus is not essential.
　実施形態では、親機１と子機２とが一対の電線４１，４２を介して電気的に接続され、一対の電線４１，４２を介した有線通信を行う場合を説明したが、この構成に限らない。親機１と子機２とは、無線通信を行うように構成されていてもよい。 In the embodiment, the case where the master unit 1 and the slave unit 2 are electrically connected via the pair of electric wires 41 and 42 and wired communication via the pair of electric wires 41 and 42 has been described. Not exclusively. The master unit 1 and the slave unit 2 may be configured to perform wireless communication.
　実施形態では、複数の通信端末３（親機１、子機２）の全てが、共通の１つのタイムスロットＴｓで信号を送信する場合を説明したが、この構成に限らない。複数の通信端末３には、２台以上の通信端末３が信号を送信する共通のタイムスロットとは別のタイムスロットで信号を送信する通信端末３が含まれていてもよい。 Although the embodiment has described the case where all of the plurality of communication terminals 3 (the base unit 1 and the handset 2) transmit signals in one common time slot Ts, the present invention is not limited to this configuration. The plurality of communication terminals 3 may include the communication terminals 3 transmitting signals in time slots different from the common time slot in which two or more communication terminals 3 transmit signals.
　（５）まとめ
　第１態様に係る通信装置（親機１）は、通信部（親機側通信部１４）と、制御部（親機側制御部１２）とを備える。通信部（１４）は、子機（２）に同期信号を送信する。制御部（１２）は、通信部（１４）を制御する。同期信号は、通信装置（１）と子機（２）とを同期させる信号であり、信号レベルが少なくとも２値間で周期的に切り替わる。制御部（１２）は、同期信号の信号レベルが２値間で切り替わる周期（Ｔ１）と、周期（Ｔ１）において信号レベルが２値の一方の値である期間の割合であるデューティと、の少なくとも一方を、子機（２）に伝達する情報に応じて変調する。 (5) Summary The communication device (the base unit 1) according to the first aspect includes a communication unit (the base unit communication unit 14) and a control unit (the base unit control unit 12). The communication unit (14) transmits the synchronization signal to the child device (2). The control unit (12) controls the communication unit (14). The synchronization signal is a signal for synchronizing the communication device (1) and the slave (2), and the signal level is periodically switched between at least two values. The control unit (12) has at least a cycle (T1) in which the signal level of the synchronization signal switches between two values, and a duty which is a ratio of a period in which the signal level is one of two values in the cycle (T1) One is modulated in accordance with the information to be transmitted to the slave (2).
　この態様によれば、通信装置（１）が子機（２）に伝達する情報に応じて、同期信号の周期とデューティとの少なくとも一方が変調される。つまり、通信装置（１）と子機（２）とを同期させる同期信号に情報が含まれることとなる。したがって、通信装置（１）と子機（２）との間の信号の簡略化を図ることができる。 According to this aspect, at least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
　第２態様に係る通信装置（１）は、第１態様において、電源部（親機側電源部１３）を更に備える。電源部（１３）は、一対の電線（４１，４２）を介して子機（２）に電力を供給する。通信部（１４）は、一対の電線（４１，４２）を介して同期信号を子機（２）に送信する。 In the first aspect, the communication device (1) according to the second aspect further includes a power supply unit (master device side power supply unit 13). The power supply unit (13) supplies power to the child device (2) through the pair of electric wires (41, 42). The communication unit (14) transmits the synchronization signal to the slave (2) via the pair of electric wires (41, 42).
　この態様によれば、子機（２）との有線通信と、子機（２）への電力供給とを兼ねることができる。 According to this aspect, it is possible to combine wired communication with the child device (2) and power supply to the child device (2).
　第３態様に係る通信装置（１）では、第２態様において、同期信号は、一対の電線（４１，４２）間の電圧の電圧値が信号レベルであって、前記２値である第１電圧値（Ｖ１）と第２電圧値（Ｖ２）とに少なくとも変化する電圧信号である。制御部（１２）は、子機（２）から送信された、一対の電線（４１，４２）間における電圧の電圧値が第３電圧値（Ｖ３）へ変化する信号を受信する。 In the communication device (1) according to the third aspect, in the second aspect, the synchronization signal is a first voltage in which the voltage value of the voltage between the pair of electric wires (41, 42) is a signal level and the binary It is a voltage signal that changes at least between the value (V1) and the second voltage value (V2). The control unit (12) receives the signal transmitted from the child device (2), in which the voltage value of the voltage between the pair of electric wires (41, 42) changes to the third voltage value (V3).
　この態様によれば、同期信号と子機（２）からの信号との混同を抑制することができる。 According to this aspect, confusion between the synchronization signal and the signal from the child device (2) can be suppressed.
　第４態様に係る通信装置（１）では、第１～第３態様のいずれかにおいて、制御部（１２）は、同期信号に基づいて設定される１つのタイムスロット（Ｔｓ）において、子機（２）からの信号を受信する。 In the communication device (1) according to the fourth aspect, in any one of the first to third aspects, the control unit (12) sets the slave unit (in one time slot (Ts) set based on the synchronization signal). Receive the signal from 2).
　この態様によれば、子機（２）からの信号の受信漏れを抑制することができる。 According to this aspect, it is possible to suppress the reception leak of the signal from the child device (2).
　第５態様に係る通信装置（１）では、第４態様において、制御部（１２）は、タイムスロット（Ｔｓ）において、子機（２）に信号を送信する。 In the communication device (1) according to the fifth aspect, in the fourth aspect, the control unit (12) transmits a signal to the slave (2) in the time slot (Ts).
　この態様によれば、通信装置（１）と子機（２）とが共通の１つのタイムスロット（Ｔｓ）で信号を送信するので、信号の簡略化を図ることができる。 According to this aspect, since the communication device (1) and the child device (2) transmit the signal in one common time slot (Ts), the signal can be simplified.
　第６態様に係る通信装置（１）では、第４又は第５態様において、通信部（１４）は、複数の子機（２）と通信可能である。制御部（１２）は、タイムスロット（Ｔｓ）において、複数の子機（２）からの信号を受信する。 In the communication device (1) according to the sixth aspect, in the fourth or fifth aspect, the communication unit (14) can communicate with a plurality of handsets (2). The control unit (12) receives signals from the plurality of handsets (2) in the time slot (Ts).
　この態様によれば、複数の子機（２）が共通の１つのタイムスロット（Ｔｓ）で信号を送信するので、信号の簡略化を図ることができる。 According to this aspect, since the plurality of handsets (2) transmit the signal in one common time slot (Ts), the signal can be simplified.
　第７態様に係る子機（２）は、第１～第６態様のいずれかの通信装置（１）からの同期信号を受信する。 The slave unit (2) according to the seventh aspect receives the synchronization signal from the communication device (1) according to any of the first to sixth aspects.
　この態様によれば、通信装置（１）が子機（２）に伝達する情報に応じて、同期信号の周期とデューティとの少なくとも一方が変調される。つまり、通信装置（１）と子機（２）とを同期させる同期信号に情報が含まれることとなる。したがって、通信装置（１）と子機（２）との間の信号の簡略化を図ることができる。 According to this aspect, at least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
　第８態様に係る通信システム（３０）は、第１～第６態様のいずれかの通信装置（１）と、第７態様の子機（２）と、を備える。言い換えれば、第８態様に係る通信システム（３０）は、第１～第６態様のいずれかの通信装置（１）と、通信装置（１）からの同期信号を受信する子機（２）と、を備える。 A communication system (30) according to an eighth aspect includes the communication device (1) according to any of the first to sixth aspects, and a slave (2) of the seventh aspect. In other words, the communication system (30) according to the eighth aspect includes the communication device (1) according to any one of the first to sixth aspects, and a slave (2) that receives a synchronization signal from the communication device (1) And.
　この態様によれば、通信装置（１）が子機（２）に伝達する情報に応じて、同期信号の周期とデューティとの少なくとも一方が変調される。つまり、通信装置（１）と子機（２）とを同期させる同期信号に情報が含まれることとなる。したがって、通信装置（１）と子機（２）との間の信号の簡略化を図ることができる。 According to this aspect, at least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
　第９態様に係るプログラムは、コンピュータシステムを第１～第６態様のいずれかの通信装置（１）の制御部（１２）として機能させる。 A program according to a ninth aspect causes a computer system to function as the control unit (12) of the communication device (1) according to any of the first to sixth aspects.
　この態様によれば、通信装置（１）が子機（２）に伝達する情報に応じて、同期信号の周期とデューティとの少なくとも一方が変調される。つまり、通信装置（１）と子機（２）とを同期させる同期信号に情報が含まれることとなる。したがって、通信装置（１）と子機（２）との間の信号の簡略化を図ることができる。 According to this aspect, at least one of the period and the duty of the synchronization signal is modulated according to the information that the communication device (1) transmits to the child device (2). That is, information is included in the synchronization signal that synchronizes the communication device (1) with the slave (2). Therefore, simplification of the signal between the communication device (1) and the child device (2) can be achieved.
１　親機（通信装置）
１２　親機側制御部（制御部）
１３　親機側電源部（電源部）
１４　親機側通信部（通信部）
２　子機
３０　通信システム
４１，４２　電線
  1 Master (Communication device)
12 Master unit side control unit (control unit)
13 Base unit power supply unit (power supply unit)
14 Master Unit Communication Unit (Communication Unit)
2 handsets 30 communication system 41, 42

Claims (9)

  1. 　子機に同期信号を送信する通信部と、
    　前記通信部を制御する制御部と、を備える通信装置であって、
    　前記同期信号は、前記通信装置と前記子機とを同期させる信号であり、信号レベルが少なくとも２値間で周期的に切り替わり、
    　前記制御部は、前記同期信号の前記信号レベルが前記２値間で切り替わる周期と、前記周期において前記信号レベルが前記２値の一方の値である期間の割合であるデューティと、の少なくとも一方を、前記子機に伝達する情報に応じて変調する
    　通信装置。     A communication unit that transmits a synchronization signal to a slave unit;
    A control unit configured to control the communication unit;
    The synchronization signal is a signal for synchronizing the communication device and the slave, and the signal level is periodically switched between at least two values,
    The control unit performs at least one of a cycle in which the signal level of the synchronization signal is switched between the two values and a duty that is a ratio of a period in which the signal level is one of the two values in the cycle. A communication device that modulates according to the information transmitted to the child device.
  2. 　一対の電線を介して前記子機に電力を供給する電源部を更に備え、
    　前記通信部は、前記一対の電線を介して前記同期信号を前記子機に送信する
    　請求項１に記載の通信装置。     It further comprises a power supply unit for supplying power to the child device via a pair of electric wires,
    The communication device according to claim 1, wherein the communication unit transmits the synchronization signal to the child device via the pair of electric wires.
  3. 　前記同期信号は、前記一対の電線間の電圧の電圧値が前記信号レベルであって、前記２値である第１電圧値と第２電圧値とに少なくとも変化する電圧信号であり、
    　前記制御部は、前記子機から送信された、前記一対の電線間における電圧の電圧値が第３電圧値へ変化する信号を受信する
    　請求項２に記載の通信装置。     The synchronization signal is a voltage signal at which the voltage value of the voltage between the pair of electric wires is at the signal level and at least changes between the first voltage value and the second voltage value which are the binary value,
    The communication device according to claim 2, wherein the control unit receives a signal transmitted from the child device, in which a voltage value of a voltage between the pair of electric wires changes to a third voltage value.
  4. 　前記制御部は、前記同期信号に基づいて設定される１つのタイムスロットにおいて、前記子機からの信号を受信する
    　請求項１～３のいずれか１項に記載の通信装置。     The communication apparatus according to any one of claims 1 to 3, wherein the control unit receives a signal from the slave in one time slot set based on the synchronization signal.
  5. 　前記制御部は、前記タイムスロットにおいて、前記子機に信号を送信する
    　請求項４に記載の通信装置。     The communication device according to claim 4, wherein the control unit transmits a signal to the slave in the time slot.
  6. 　前記通信部は、複数の前記子機と通信可能であり、
    　前記制御部は、前記タイムスロットにおいて、前記複数の子機からの信号を受信する
    　請求項４又は５に記載の通信装置。     The communication unit can communicate with a plurality of the slaves,
    The communication device according to claim 4, wherein the control unit receives signals from the plurality of slaves in the time slot.
  7. 　請求項１～６のいずれか１項に記載の通信装置からの前記同期信号を受信する
    　子機。     A slave which receives the synchronization signal from the communication device according to any one of claims 1 to 6.
  8. 　請求項１～６のいずれか１項に記載の通信装置と、
    　前記通信装置からの前記同期信号を受信する子機と、を備える
    　通信システム。     A communication apparatus according to any one of claims 1 to 6.
    A slave unit for receiving the synchronization signal from the communication device.
  9. 　コンピュータシステムを、請求項１～６のいずれか１項に記載の通信装置の前記制御部として機能させるためのプログラム。
          A program for causing a computer system to function as the control unit of the communication device according to any one of claims 1 to 6.
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Citations (5)

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JP2000188602A (en) * 1998-11-02 2000-07-04 Pittway Corp Communication equipment and method for the same
JP2005142778A (en) * 2003-11-06 2005-06-02 Denso Corp Power line communication apparatus
JP2014216849A (en) * 2013-04-25 2014-11-17 ラピスセミコンダクタ株式会社 Communication system, reception device, semiconductor device, and reset method for communication system
JP2016131316A (en) * 2015-01-14 2016-07-21 株式会社デンソー Slave for communication
JP2017526994A (en) * 2015-04-21 2017-09-14 サイプレス セミコンダクター コーポレーション In-vehicle electronic device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000188602A (en) * 1998-11-02 2000-07-04 Pittway Corp Communication equipment and method for the same
JP2005142778A (en) * 2003-11-06 2005-06-02 Denso Corp Power line communication apparatus
JP2014216849A (en) * 2013-04-25 2014-11-17 ラピスセミコンダクタ株式会社 Communication system, reception device, semiconductor device, and reset method for communication system
JP2016131316A (en) * 2015-01-14 2016-07-21 株式会社デンソー Slave for communication
JP2017526994A (en) * 2015-04-21 2017-09-14 サイプレス セミコンダクター コーポレーション In-vehicle electronic device

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