JP2013258024A - Illumination control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination control system capable of preventing a radio transmitter from repeating a transmission operation and thereby battery life from being shortened in the case that radio communication with a radio receiver is impossible.SOLUTION: A radio transmitter 8 included in an illumination control system comprises: a beacon synchronization unit 80a periodically transmitting a beacon that is notification information to take temporal synchronization with a radio receiver; a counter 80b counting the number of continuous failures in beacon synchronization; and a mode changing unit 80c changing over to a low-cycle mode in which a transmission interval of an ON control request becomes longer when the number of continuous failures is a predetermined value or more. Due to this configuration, the radio transmitter 8 can prevent the transmission operation from being repeated to shorten the battery life in the case that radio communication such as beacon synchronization with the radio receiver is impossible.

Description

  The present invention relates to a wireless transmitter including a heat ray sensor and an illuminance sensor, and an illumination control system that controls a lighting fixture using a wireless receiver wirelessly connected to the wireless transmitter.

  Conventionally, lighting control systems that control the ON / OFF and dimming status of multiple lighting fixtures individually or collectively in cooperation with sensors such as brightness sensors and human sensors in homes and buildings have been introduced. Has been. In this illumination control system, the ON / OFF of the lighting fixture can be appropriately controlled according to the brightness of external light and the presence of a person, so that energy saving can be achieved.

  For example, the illumination control system shown in FIG. 8 includes a wireless transmitter 101 having a heat ray sensor and an illuminance sensor, a wireless receiver 102 connected to the wireless transmitter 101 by wireless communication, a transmission unit 103, and a relay control terminal. Device 104. The transmission unit 103 is connected to the wireless receiver 102 and the relay control terminal 104 via the two-wire signal line Ls, and the control information of the lighting fixture 105 generated in the wireless transmitter 101 via the wireless receiver 102. To control the operation.

  Next, the operation of the illumination control system shown in this figure will be described. In the lighting control system using a wireless network, notification information called a beacon is periodically transmitted from the wireless transmitter 101 (for example, every 5 minutes) to the wireless receiver 102, and temporal synchronization of the wireless network is executed ( S110). The wireless receiver 102 can confirm the data transmission / reception timing with the wireless transmitter 101 by this beacon synchronization. When the ambient illumination value detected by the illuminance sensor is equal to or lower than the set illuminance value and the input from the heat ray sensor exceeds the threshold value and the person is detected, the wireless transmitter 101 sends an ON control request for the luminaire at its own timing. It can be transmitted to the wireless receiver 102 (S111).

  Next, the wireless receiver 102 that has received the ON control request transmits an ON notification as control data to the transmission unit 103 (S112). Then, the transmission unit 103 transmits a control command signal including the address information of the lighting fixture 105 and the ON control state to the relay control terminal 104 corresponding to the lighting fixture 105 to be controlled (S113). . Then, the relay control terminal 104 controls the lighting fixture 105 to be ON, and notifies the transmission unit 103 of ACK indicating that the ON control of the lighting fixture 105 has been completed (S114). The transmission unit 103 notifies the wireless receiver 102 that the ON control of the lighting fixture 105 has been completed (S115), and the wireless receiver 102 notifies the wireless transmitter 101 of ACK (S116). By this ACK, the wireless transmitter 101 can determine the establishment of the ON control request.

  In addition, when the operation holding time expires after transmitting the ON control request, the wireless transmitter 101 transmits an OFF control request for OFF control of the lighting fixture 105 to the wireless receiver 102 (S117). The wireless receiver 102 that has received the OFF control request transmits an OFF notification as control data to the transmission unit 103 (S118). Then, the transmission unit 103 transmits a control command signal including the address information of the lighting fixture 105 and the OFF control state to the relay control terminal 104 corresponding to the lighting fixture 105 to be controlled (S119). . Next, the relay control terminal 104 controls the lighting apparatus 105 to OFF, and notifies the transmission unit 103 of ACK indicating that the OFF control has been completed (S120). The transmission unit 103 notifies the receiver 102 that the lighting device 105 has been turned off (S121), and the wireless receiver 102 notifies the wireless transmitter 101 of ACK (S122).

  By the way, as a remote monitoring control system that controls a lighting fixture with a two-wire remote controller, a remote monitoring control system that can perform desired control according to the presence or absence of a person in a detection area with a simple configuration is disclosed ( For example, see Patent Document 1).

JP 2000-341768 A

  However, the conventional lighting control system may be interrupted due to a planned power outage or maintenance work during the construction of the wireless receiver 102 and the wireless transmitter 101 or until the delivery after the construction. In this case, the wireless receiver 102 is left unpowered without being energized, and the wireless transmitter 101 is left with a battery such as a lithium ion battery inserted. As a result, when there is a person around the wireless transmitter 101, the wireless transmitter 101 continuously transmits an ON control request (S111) including retry to the wireless receiver 102 as shown in FIG. Repeatedly, the battery runs out earlier than usual (in about 1 day, etc.).

  That is, at present, the wireless transmitter 101 cannot recognize the absence of the wireless receiver 102 or the power-off state. In this case, the transmission operation (S111) that requires power consumption is repeated as described above to shorten the battery life. There is a problem of end.

  The present invention has been made in view of the above problems, and even when wireless communication with a wireless receiver is not possible, the wireless transmitter has prevented the battery life from being shortened by repeating the transmission operation. An object is to provide a lighting control system.

  In order to achieve the above object, the present invention provides an illumination load operation control based on detection results of an illuminance sensor that detects illuminance in a detection area and a heat ray sensor that detects heat rays emitted from a human body in the detection area. And a wireless receiver wirelessly communicating with the wireless transmitter, wherein the wireless transmitter has an ambient illuminance value detected by the illuminance sensor to control a lighting load. Therefore, when the illumination intensity is less than a preset illuminance value and a person is detected by the heat ray sensor, an ON control request for ON control of an illumination load is transmitted to the wireless receiver, and the ON control request is When ACK cannot be received from the wireless transmitter, control means for controlling to repeatedly transmit the ON control request at a predetermined transmission interval, and periodically broadcast information Synchronization means for synchronizing in time with the wireless receiver by transmitting a beacon, a counting means for counting the number of consecutive failures of beacon synchronization in the synchronization means, and a count in the counting means equal to or greater than a predetermined value Then, mode change means for changing the transmission interval of the ON control request to a low cycle mode longer than the predetermined transmission interval is provided.

  In this lighting control system, a period during which the ON control request is transmitted at the predetermined transmission interval is set to a normal mode, and the mode changing unit receives an ACK for the ON control request transmitted in the low cycle mode from the wireless receiver. Or when receiving a return notification from the wireless receiver, it is preferable to return from the low cycle mode to the normal mode.

  In this illumination control system, it is preferable that the mode change unit returns from the low cycle mode to the normal mode after further synchronization with the wireless receiver.

  According to the lighting control system of the present invention, the wireless transmitter counts the number of consecutive failure of beacon synchronization, and shifts to a low-cycle mode in which the control information transmission interval is lengthened when this number exceeds a predetermined value. As a result, the wireless transmitter can keep the battery life long without repeating the reporting operation at a short transmission interval even when wireless communication with the wireless receiver becomes impossible.

It is a system block diagram of the illumination control system which concerns on Embodiment 1 of this invention. It is a functional block diagram of the radio transmitter with which a lighting control system same as the above is equipped. It is a functional block diagram of the radio | wireless receiver with which a lighting control system same as the above is equipped. It is a sequence diagram of a lighting control system same as the above. It is a table for demonstrating the transmission mode in a radio transmitter same as the above. (A) The flowchart which shows the operation | movement procedure in the normal mode of a radio | wireless transmitter same as the above, (b) The flowchart which shows the operation | movement procedure in the low cycle mode of a radio | wireless transmitter same as the above. It is a sequence diagram of the illumination control system which concerns on Embodiment 2. FIG. It is a sequence diagram of the conventional illumination control system. It is a sequence diagram of the conventional illumination control system.

  An illumination control system according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a configuration of a lighting control system 1 according to the first embodiment. The lighting control system 1 includes a transmission unit 2, a relay control terminal 3, a remote control relay 4, a remote control transformer 5, a remote control switch 6, a wireless receiver 7, a wireless transmitter 8, and a lighting fixture 9. And.

  The relay control terminal 3, the remote control switch 6, and the wireless receiver 7 are connected to the transmission unit 2 via a two-wire signal line, and exchange of information with the transmission unit 2 is performed using a signal line. The transmission signal is transmitted through a multiplex transmission method. In this lighting control system 1, wireless communication is performed between the wireless receiver 7 and the wireless transmitter 8, and the on / off state of the lighting fixture 9 and the illuminance in the room are automatically controlled.

  Based on the transmission signal from the remote control switch 6 or the wireless receiver 7, the transmission unit 2 specifies the lighting fixture 9 to be controlled from the address information included in the transmission signal, and specifies the control state for the lighting fixture 9. . Then, the transmission unit 2 sends the address information of the lighting fixture 9 and its control state (ON, OFF, dimming level, etc.) to the relay control terminal 3 corresponding to the lighting fixture 9 to be controlled. Transmit as a control command signal.

  The lighting fixture 9 existing in the lighting control system 1 can be uniquely specified by the load address. Specifically, a unique identifier called a load channel (Ch) is assigned to the relay control terminal 3, and a load number (Nm) is assigned to the remote control relay 4 connected to the relay control terminal 3. A unique identifier called is assigned. The load address (Ch-Nm) is configured by combining the load channel (Ch) and the load number (Nm).

  The relay control terminal 3 has a function as a load control terminal that controls the state of the lighting fixture 9 according to the control state of the relay. Based on the transmission signal from the transmission unit 2, the relay control terminal 3 sends a control signal to the remote control relay 4 corresponding to the lighting fixture 9 to be controlled among the remote control relays 4 connected to the relay control terminal 3. Thus, the state of the remote control relay 4 is controlled. The individual relays of the remote control relay 4 are controlled by the relay control terminal 3 to turn on / off the commercial AC from the breaker power source (AC 100 or 200 V) 10 or the like, thereby turning the lighting fixture 9 on or off. To.

  The remote control transformer 5 supplies driving power to the relay control terminal 3 and the remote control relay 4.

  The remote control switch 6 has a function as an input terminal for outputting a control command for controlling the lighting fixture 9. Specifically, the remote control switch 6 is a terminal device that is installed on an arbitrary wall surface such as a room, for example, and can be pushed by a user using the lighting fixture 9. In response to any of the operation switches being operated, the remote control switch 6 transmits the address information associated with the operation switch and the operation state of the operation switch to the transmission unit 2 as a control command.

  The wireless receiver 7 is embedded in the ceiling surface, wirelessly transmits / receives control information to / from the wireless transmitter 8, and is connected to a two-wire signal line to transmit / receive control data to / from the transmission unit 2. An address and an area number are set in the wireless receiver 7 using, for example, a radio wave type wireless address setting device.

  The wireless transmitter 8 is installed on a wall surface in a layout-free manner, and includes an illuminance sensor that detects illuminance around the detection area, and a heat ray sensor that detects heat rays emitted from a human body in the detection area. Further, an address setting selection knob operated by the user, an operation holding time setting knob, and the like are provided on the back side of the wireless transmitter 8.

  The heat ray sensor detects a heat ray emitted from a human body and monitors a human body detection signal output according to the presence or absence of a person in the detection area. The wireless transmitter 8 can transmit address information and control information for automatic ON / OFF control and automatic dimming of the lighting fixture 9 to the wireless receiver 7 when a movement of a person in the detection area is detected. And In addition, the wireless transmitter 8 transmits an OFF control request for turning off the lighting fixture 9 to the wireless receiver 7 after a predetermined operation holding time has elapsed since a person was detected in the detection area by the heat ray sensor.

  The illuminance sensor detects the brightness of the detection area (illuminance detection range of 5 to 1000 lux, etc.). The wireless transmitter 8 can transmit control information for controlling the lighting fixture 9 to the wireless receiver 7 based on the illuminance detected by the illuminance sensor. By illumination control using this illuminance sensor, it is possible to control the light by keeping the average illuminance constant according to the external light such as lighting after sunset, and energy saving can be achieved while maintaining the comfort of the illumination environment. Further, since the wireless transmitter 8 includes an illuminance sensor in addition to the heat ray sensor, it is possible to control lighting only when it is dark and there is a person.

  An individual address, a pattern address, a group address, and the like are set in the wireless transmitter 8 as address information of the lighting fixture 9 to be controlled using, for example, a radio wave type wireless address setting device. The individual address is information for specifying the lighting fixture 9 to be subjected to individual control, and corresponds to a load address (individual “0-1” or the like). The group address is information for specifying a group subject to group control in order to collectively control a plurality of lighting fixtures 9 to the same control state, and is a number assigned to each preset group. ("G-1" etc.) corresponds to this. The pattern address is information for specifying a pattern for collectively controlling a plurality of lighting fixtures 9 to a predetermined control state predetermined for each lighting fixture 9. It is a number assigned (such as “P-1”).

  Next, the functional configuration of the wireless transmitter 8 provided in the illumination control system 1 will be described with reference to FIG. The wireless transmitter 8 includes a CPU (control means) 80, a power supply unit 81, a buzzer 82, a sub clock unit 83, a heat ray detection unit 84, an LED display unit 85, an address switching unit 86, a wireless transmission / reception unit 87, an illuminance measurement unit 88, A brightness setting unit 89, an operation holding time setting unit 90, and an address registration setting unit 91 are provided.

  The CPU 80 further includes a beacon synchronization unit 80a, a count unit 80b, a mode change unit 80c, and a timer unit 80d. The beacon synchronization unit 80a performs control so that a beacon that is broadcast information is transmitted to the wireless receiver 7 at regular intervals (for example, every 5 minutes) to obtain temporal synchronization regarding transmission timing (hereinafter referred to as beacon synchronization). The wireless receiver 7 checks the data transmission / reception timing with the wireless transmitter 8 based on the time data included in the beacon.

  The counting unit 80b counts the number of consecutive beacon synchronization failures that are executed by the wireless transmitter 8 in the normal mode to be described later. The mode changing unit 80c changes from the normal mode to the low cycle mode described later when the count number in the counting unit 80b exceeds a predetermined number (for example, 3 times). In addition, the mode change unit 80c returns to the normal mode when an ACK is received from the wireless receiver 7 in the low cycle mode. The timer unit 80d has a timer function of knowing the passage of a predetermined time by counting the clock, and generates an interrupt to the CUP 80 when the operation holding time of the wireless transmitter 8 input by the operation input unit 93 is detected.

  The power supply unit 81 corresponds to the specific low-power radio and supplies internal power from a dedicated lithium ion secondary battery. The buzzer 82 generates a confirmation sound and a warning sound, and the sub clock unit 83 generates an operating frequency of the CPU 80 by a crystal resonator.

  The heat ray detector 84 includes a heat ray sensor such as a pyroelectric element that detects changes in the heat ray, amplifies the output of the heat ray sensor, and outputs the amplified output to the CPU 80. The CPU 80 determines the presence / absence of a person in the detection area by comparing the output of the heat ray detection unit 84 with the stored threshold value. Further, the CPU 80, for example, sets the transmission interval of the ON control request to 2 by stopping the processing of the detection signal input at a predetermined interval (such as once every 3 seconds) from the pyroelectric element of the heat ray detection unit 84 for a predetermined period. Control minutes and so on.

  The LED display unit 85 blinks or emits light when a person is detected by the heat ray sensor, when an address is set, or when a power supply is insufficient. Note that the values of the setting items (for example, the set illuminance value, the operation holding time, and the address data) input by the operation input unit 93 are held. Further, as will be described later, the wireless transmitter 8 holds whether the current transmission mode of the wireless transmitter 8 is the normal mode or the low cycle mode. The wireless transmission / reception unit 87 is configured by connecting a dedicated ASIC to an antenna, and realizes transmission / reception of control information to / from the wireless receiver 7.

  The illuminance measurement unit 88 includes an illuminance sensor such as CdS, a photodiode, or a phototransistor that detects ambient brightness, amplifies the output of the illuminance sensor, and outputs the amplified output to the CPU 80. The CPU 80 compares the output of the illuminance measuring unit 88 with the brightness of the held predetermined brightness level (setting level).

  The operation input unit 93 that is a knob unit provided on the back surface of the wireless transmitter 8 includes a brightness setting unit 89, an operation holding time setting unit 90, and an address registration setting unit 91. The brightness setting unit 89 is a change-over switch for changing the illuminance setting value for controlling the lighting fixture 9. The operation holding time setting unit 90 is a changeover switch for changing the time during which the lighting fixture 9 is kept on, and selects the operation holding time from 30 seconds, 3 minutes, 10 minutes, and the like. The address registration setting unit 91 transmits / receives data to / from a separate radio wave address setter and receives radio signals. The address switching unit 86 is a knob unit that selects an address from numbers 1 to 16 and the like.

  Next, the functional configuration of the wireless receiver 7 provided in the illumination control system 1 will be described with reference to FIG. The wireless receiver 7 includes CPUs (processing means) 70a and 70b, wireless transmission / reception units 71a and 71b, a switch 72, a multiplexed transmission signal transmission / reception unit 73, a power supply unit 74, an LED display unit 75, and a memory unit 76.

  The wireless transmission / reception units 71a and 71b are configured by connecting a dedicated ASIC to an antenna, and transmit / receive control information to / from the wireless transmitter 8 via a switch 72 that performs path switching with a plurality of wireless transmitters 8 and the like. Is realized. When receiving the control signal from the wireless transmitter 8, the wireless transmission / reception units 71a and 71b output detection signals to the CPUs 70a and 70b.

  A multiplex transmission signal transmission / reception unit 73 as a transmission communication unit transmits / receives transmission signals to / from the transmission unit 2 by a multiplex transmission method via a signal line Ls connected to the pair of terminals T1 and T1. The multiplex transmission signal transmission / reception unit 73 converts the transmission signal input via the signal line Ls and outputs it to the CPUs 70a and 70b, converts the signals output from the CPUs 70a and 70b into transmission signals, and converts them into signal lines. Send to Ls.

  The power supply unit 74 obtains an internal power supply by full-wave rectifying a transmission signal input via the signal line Ls by a full-wave rectifier and further converting the transmission signal to a constant voltage by a constant voltage unit.

  In the CPUs 70a and 70b, when the address data included in the transmission signal received via the multiplex transmission signal transmission / reception unit 73 matches the address data stored in the memory unit 76, the control data of the transmission signal is received and the control data corresponding to the control data is received. To work.

  The LED display unit 75 blinks or emits light when an address is set. The memory unit 76 is a non-volatile memory and stores values of setting items (for example, area numbers and addresses) and the current state of the wireless receiver 7.

  Next, the operation procedure of the illumination control system 1 will be described with reference to FIG. First, the beacon synchronization unit 80a of the wireless transmitter 8 transmits a beacon to the wireless receiver 7 periodically (for example, every 5 minutes) for beacon synchronization (S10). When the beacon synchronization is not completed because the wireless transmitter 8 cannot receive the ACK for the beacon synchronization, the wireless transmitter 8 performs the beacon synchronization again with the wireless receiver 7 after 5 minutes. This beacon synchronization is performed, for example, by repeating the cycle up to 3 times every 5 minutes.

  Thereafter, the mode changing unit 80c of the wireless transmitter 8 shifts to the low cycle mode when the consecutive failure of the beacon synchronization counted by the counting unit 80b is three times or more. That is, when the synchronization cannot be completed even in the 6-second beacon reception mode (S11) immediately after the third beacon synchronization, the mode change unit 80c shifts from the normal mode to the low cycle mode.

  Here, the transmission mode managed in the wireless transmitter 8 will be described with reference to FIG. As shown in the table 30, in the normal mode, when a person is detected, the wireless transmitter 8 transmits an ON control request to the wireless receiver 7 with a transmission interval of once every 3 seconds (maximum retry 14 times). In the low cycle mode, when the wireless transmitter 8 detects a person, the wireless transmission device 8 transmits an ON control request to the wireless receiver 7 with a transmission interval of once every N minutes (for example, 2 minutes) (maximum retry 14 times). .

  And in the low cycle mode, when the set illuminance value is equal to or higher than the ambient illuminance value actually detected by the illuminance sensor and the input from the heat ray sensor exceeds the threshold value, the wireless transmitter 8 requests the ON control. Is transmitted to the wireless receiver 7 (S12). Further, when the wireless transmitter 8 does not receive the ACK for the ON control request from the wireless receiver 7 (S13), the wireless transmitter 8 retransmits (retrys) the ON control request. This retransmission of the ON control request is repeated, for example, 14 times at maximum with a transmission interval of 2 minutes at the maximum.

  When the wireless receiver 7 returns to a state in which wireless communication with the wireless transmitter 8 is possible, such as power recovery (S14), the wireless receiver 7 controls the ON control request (S15) from the wireless transmitter 8. An ON notification is transmitted as data to the transmission unit 2 (S16). Next, the transmission unit 2 transmits the address information of the lighting fixture 9 and the ON control state as a control command signal to the relay control terminal 3 corresponding to the lighting fixture 9 to be controlled (S17). . Then, the relay control terminal 3 controls the lighting fixture 9 to be ON, and returns an ACK indicating that the ON control is completed to the transmission unit 2 (S18), and the lighting fixture from the transmission unit 2 to the wireless receiver 7 9 is informed that the ON control is completed (S19).

  Then, the wireless transmitter 8 receives an ACK for the ON control request (S20), determines the return of the wireless receiver 7, and, for example, in the beacon reception mode (S21) for 6 seconds, After synchronization with the transmitter 8 is completed (S22), the normal mode is restored.

  Next, the operation procedure in each transmission mode of the wireless transmitter 8 will be described with reference to FIG. FIG. 6A shows the operation procedure of the radio transmitter 8 in the normal mode. First, the beacon synchronization unit 80a of the wireless transmitter 8 performs periodic beacon synchronization with the wireless receiver 7 (S41). When the beacon synchronization is completed (Yes in S42), the wireless transmitter 8 can transmit / receive data to / from the wireless receiver 7. That is, after that, the CPU 80 confirms whether or not the set illuminance value is equal to or greater than the ambient illuminance value and the input from the heat ray sensor exceeds the threshold value to detect a person. When a person is detected, the CPU 80 controls to transmit an ON control request to the wireless receiver 7 via the wireless transmission / reception unit 87. If the ACK for the ON control request cannot be received from the wireless receiver 7, the CPU 80 retransmits the ON control request to the wireless receiver 7 by setting the transmission interval to once every 3 seconds (maximum 14 retries). .

  On the other hand, when the beacon synchronization is not completed (No in S42), for example, the ACK for the beacon synchronization cannot be received (No in S42), the beacon synchronization unit 80a executes the beacon synchronization again after 5 minutes with the wireless receiver 7 (S43). Then, the counting unit 80b counts the number of consecutive beacon synchronization failures including re-beacon synchronization. The mode changing unit 80c determines whether the number of consecutive failure of beacon synchronization counted by the counting unit 80b is equal to or greater than a predetermined number (for example, 3 times) (S44). Yes), the process shifts to the low cycle mode (S45).

  Next, the operation procedure in the low cycle mode of the wireless transmitter 8 will be described with reference to FIG. First, the CPU 80 confirms whether or not the set illuminance value is equal to or greater than the ambient illuminance value and a person is detected by the heat ray sensor (S51). If the condition is satisfied (Yes in S51), the CPU 80 controls to transmit the ON control request to the wireless receiver 7 via the wireless transmission / reception unit 87 (S52).

  Next, the CPU 80 confirms whether or not an ACK from the wireless receiver 7 has been received (S53). If the ACK cannot be received (No in S53), an ON control request is made at a predetermined transmission interval (for example, 2 minutes). Are repeated (S54). Then, when the ACK from the wireless receiver 7 can be received (Yes in S53), the mode changing unit 80c returns to the normal mode assuming that the power of the wireless receiver 7 has been restored (S55).

  As described above, when the wireless transmitter 8 performs beacon synchronization with the wireless receiver 7, the beacon synchronization is not continuously established for a predetermined number of times (three times or more). Transition to low cycle mode. Further, it is assumed that the wireless transmitter 8 has received an ACK from the wireless receiver 7 in the low cycle mode, as a trigger for returning from the low cycle mode to the normal mode.

  As a result, when the wireless receiver 7 cannot perform wireless communication with the power off, such as during a planned power outage or maintenance work, and there is a person around the wireless transmitter 8 that operates on a battery, the wireless receiver 8 to the wireless receiver 7 can reduce the frequency of issuing ON control requests that require power consumption. For this reason, it can prevent reliably that the battery life of the radio | wireless transmitter 8 becomes short. The wireless transmitter 8 can automatically return to the normal mode after the wireless receiver 7 is energized in order to trigger the transmission mode change when the ACK can be received from the wireless receiver 7 in the low cycle mode.

(Embodiment 2)
Hereinafter, Embodiment 2 of the illumination control system according to the present invention will be described with reference to FIG. The same components as those in the illumination control system 1 according to Embodiment 1 are given the same reference numerals, and detailed descriptions thereof are omitted.

  The operation procedure of the illumination control system 1 according to the second embodiment will be described with reference to FIG. In addition, since the operation | movement procedure from S10 to S14 is the same as that of FIG. 4 of the said Embodiment 1, the description is abbreviate | omitted. In the second embodiment, when the wireless receiver 7 returns to power in S14, the wireless receiver 7 gives a return notification to the wireless transmitter 8 (S23). The wireless transmitter 8 returns to the normal mode after the synchronization between the wireless receiver 7 and the wireless transmitter 8 is completed (S25) in the beacon reception mode (S24) for 6 seconds, for example.

  Therefore, in the lighting control system 1 according to the second embodiment, in addition to the effects of the first embodiment, the wireless transmitter 8 sends a return notification from the wireless receiver 7 in the low cycle mode as a trigger for changing the transmission mode. It can be received, and after the wireless receiver 7 is energized, it can automatically return to the normal mode.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, the number of wireless transmitters is not limited to one, and the same control can be realized with two or more wireless transmitters. In addition, the number of consecutive failures of beacon synchronization in the normal mode is 3 times, the transmission interval of the ON control request in the normal mode is 3 seconds, and the transmission interval of the ON control request in the low cycle mode is 2 minutes to the last. The numerical value of may be sufficient.

DESCRIPTION OF SYMBOLS 1 Illumination control system 2 Transmission unit 3 Relay control terminal 4 Remote control relay 5 Remote control transformer 6 Remote control switch 7 Wireless receiver 70 CPU
71a, 71b Wireless transmission / reception unit 76 Memory unit 8 Wireless transmitter 80 CPU (control means)
80a Beacon synchronization unit (synchronization means)
80b Count unit (counting means)
80c Mode change unit (mode change means)
80d Timer 87 Wireless transmitter / receiver 9 Lighting equipment

Claims (3)

An illuminance sensor for detecting illuminance in a detection area, a radio transmitter for controlling the operation of an illumination load based on each detection result by a heat ray sensor for detecting a heat ray emitted from a human body in the detection area, and the radio transmitter A lighting control system comprising:
The wireless transmitter is
ON control for ON control of the illumination load when the ambient illuminance value detected by the illuminance sensor is less than a preset illuminance value set in advance for controlling the illumination load and a person is detected by the heat ray sensor Control means for transmitting a request to the wireless receiver and controlling to repeatedly transmit the ON control request at a predetermined transmission interval when an ACK for the ON control request cannot be received from the wireless transmitter;
Synchronizing means that periodically synchronizes the wireless receiver by transmitting a beacon that is broadcast information periodically,
Counting means for counting the number of consecutive failure of beacon synchronization in the synchronization means;
Illumination control, comprising: mode change means for changing a transmission interval of the ON control request to a low cycle mode longer than the predetermined transmission interval when the number of times in the counting means becomes a predetermined value or more. system. The period during which the ON control request is transmitted at the predetermined transmission interval is set to the normal mode,
When the mode change means receives an ACK for the ON control request transmitted in the low cycle mode from the radio receiver, or receives a return notification from the radio receiver, the mode change means starts the normal mode from the low cycle mode. The lighting control system according to claim 1, wherein   The lighting control system according to claim 2, wherein the mode changing unit further returns to the normal mode from the low cycle mode after being synchronized with the wireless receiver.

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