JP2016143395A - Slave machine of automatic fire alarm system, and automatic fire alarm system using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slave machine of an automatic fire alarm system to which an interlock function of interlocking with other equipment despite a quite simple structure and a P type, and an automatic fire alarm system using the slave machine.SOLUTION: A transmission circuit 14 is electrically connected to a pair of electric cables 51 and 52 to which a standby voltage is applied, and changes the voltage between the pair of electric cables 51 and 52 into a predetermined transmission voltage by stepping down the voltage from the standby voltage. A determination unit 161 determines two states of a fire alarm state in which occurrence of a fire is alarmed and an interlocked alarm state in which other equipment is interlocked. If a result of determination by the determination unit 161 is the fire alarm state, a control unit 162 adjusts the voltage value of the transmission voltage into a predetermined fire alarm level and generates a fire alarm. If the result of determination by the determination unit 161 is the interlocked alarm state, the control unit 162 adjusts the voltage value of the transmission voltage into a predetermined interlocked alarm level different from the fire alarm level, and generates an interlocked alarm.SELECTED DRAWING: Figure 1

Description

  The present invention generally relates to a slave unit of an automatic fire notification system, and an automatic fire notification system using the same, and more particularly, to a slave unit of an automatic fire notification system electrically connected to a master unit via a pair of electric wires. And an automatic fire alarm system using the same.

  Conventionally, there are two types of systems, P-type (Proprietary-type) and R-type (Record-type), as automatic fire alarm systems (self-fire alarm systems). Regardless of P-type or R-type, the automatic fire alarm system detects the occurrence of a fire with a slave unit consisting of a heat detector, smoke detector, flame detector, etc., and sends it to a master unit consisting of a receiver. It is configured to notify the fire from the slave unit.

  In the P-type automatic fire alarm system, a slave unit electrically short-circuits between a pair of electric wires, thereby notifying a master unit composed of a receiver of the occurrence of a fire. In the R-type automatic fire system, a slave unit notifies the master unit of the occurrence of a fire through communication using a transmission signal transmitted through a transmission line. In general, an R-type automatic fire alarm system is used for large-scale buildings, and a P-type automatic fire alarm system is often used for buildings of medium-sized or smaller because of ease of construction.

  In addition, as an automatic fire notification system, there is a system having a function of interlocking with other devices such as smoke prevention equipment and emergency broadcasting equipment. In this type of automatic fire alarm system, the slave unit has a function of generating a linkage report for linking other devices, and the master unit receives the linkage report from the slave unit, thereby Execute synchronization. In the P-type automatic fire alarm system, it is necessary to provide separate lines for the fire alarm and the interlocking alarm because the fire alarm and the interlocking alarm for notifying the occurrence of a fire cannot be distinguished by the master unit in one line.

  By the way, for example, in Patent Document 1, as a P-type automatic fire alarm system, a system in which a plurality of fire detectors as slave units are connected to a plurality of sensor lines derived from a fire receiver as a master unit. Is disclosed. In the automatic fire alarm system described in Patent Document 1, the slave unit detects an abnormality detection signal having the same signal format as the fire signal to be output to the master unit when a failure is detected in the slave unit itself. It is configured to output for a predetermined time different from the output time. When the abnormality detection signal is input, the master unit distinguishes from the input of the fire signal due to the difference in the input time of this signal, and performs a predetermined alarm operation.

JP 2002-8154 A

  However, in the automatic fire alarm system described in Patent Document 1, the fire signal from the slave unit and the abnormality detection signal can only be distinguished by the master unit, and the fire report and the interlocking report cannot be distinguished by the master unit. . Therefore, in the automatic fire alarm system described in Patent Document 1, if an interlocking function with other devices is added, it is necessary to provide separate lines for the fire alarm and the interlocking alarm, resulting in a complicated system configuration. .

  The present invention has been made in view of the above-mentioned reasons, and has a simple configuration as much as possible. The slave unit of the automatic fire notification system to which the interlocking function with other devices is added while being P-type, and the automatic fire notification using the same. The purpose is to provide a system.

  The slave unit of the automatic fire alarm system of the present invention is electrically connected to a pair of wires to which a standby voltage is applied, and changes the voltage between the pair of wires to a predetermined transmission voltage by stepping down from the standby voltage. A transmission circuit, a determination unit for determining an operation state including two states of a fire report state for notifying the occurrence of a fire and a linked report state for interlocking with another device; and controlling the transmission circuit to determine a voltage value of the transmission voltage. A control unit for adjusting, and when the determination result of the determination unit is in the fire report state, the control unit adjusts the voltage value of the transmission voltage to a predetermined fire report level to generate a fire report, When the determination result of the determination unit is in the linked information state, the transmission voltage is generated by adjusting the voltage value of the transmission voltage to a predetermined linked information level different from the fire report level. And

  An automatic fire alarm system according to the present invention includes the above slave unit and a master unit that applies the standby voltage to the pair of wires, and the master unit detects a voltage value between the pair of wires. It is configured.

  The present invention has an advantage that an interlocking function with other devices can be added even though it is a P type with a simple configuration as much as possible.

1 is a block diagram illustrating a schematic configuration of an automatic fire notification system according to Embodiment 1. FIG. 1 is a block diagram illustrating an overall configuration of an automatic fire notification system according to Embodiment 1. FIG. It is a schematic circuit diagram which shows the principal part of the subunit | mobile_unit of the automatic fire alarm system which concerns on Embodiment 1. FIG. It is a schematic circuit diagram which shows the principal part of the subunit | mobile_unit of the automatic fire alarm system which concerns on Embodiment 1. FIG. It is a flowchart which shows the operation example of the automatic fire alerting | reporting system which concerns on Embodiment 1. FIG. It is a voltage waveform diagram which shows the operation example of the automatic fire alarm system which concerns on Embodiment 1. It is explanatory drawing of operation | movement of the automatic fire alarm system which concerns on Embodiment 2. FIG.

(Embodiment 1)
As shown in FIG. 1, the automatic fire notification system 100 according to the present embodiment includes at least one slave unit 1 and one master unit 2.

  The base unit 2 includes an application unit 21 that applies a voltage between the pair of electric wires 51 and 52. The voltage applied between the pair of electric wires 51 and 52 by the applying unit 21 is hereinafter referred to as “standby voltage”.

  The subunit | mobile_unit 1 is provided with the transmission circuit 14, the determination part 161, and the control part 162. FIG. The transmission circuit 14 is electrically connected to the pair of electric wires 51 and 52 to which a standby voltage is applied, and changes the voltage between the pair of electric wires 51 and 52 to a predetermined transmission voltage by stepping down from the standby voltage. It is configured.

  The determination unit 161 is configured to determine an operation state including two states of a fire report state for notifying the occurrence of a fire and a linked report state for interlocking the other device 3 (see FIG. 2). The controller 162 controls the transmission circuit 14 and adjusts the voltage value of the transmission voltage.

  Here, when the determination result of the determination unit 161 is in the fire report state, the control unit 162 adjusts the voltage value of the transmission voltage to a predetermined fire report level and generates a fire report. In addition, when the determination result of the determination unit 161 is in the interlocking report state, the control unit 162 adjusts the voltage value of the transmission voltage to a predetermined interlocking report level different from the fire alarm level so as to generate the interlocking report. It is configured.

  That is, in the handset 1 of the automatic fire alarm system 100 according to the present embodiment, the control unit 162 controls the transmission circuit 14 according to the determination result of the determination unit 161 and adjusts the voltage value of the transmission voltage. Report and linked report. In short, the subunit | mobile_unit 1 is changing the voltage between a pair of electric wires 51 and 52 by the pressure | voltage fall from standby voltage, and the magnitude | size (voltage value) of the voltage (transmission voltage) between a pair of electric wires 51 and 52 after a change. ) Is switched between the fire report level and the linked report level. Thereby, the subunit | mobile_unit 1 transmits the voltage signal which can distinguish fire information and interlocking information.

  For this reason, in the automatic fire notification system 100 using the child device 1, it is possible to distinguish between the fire information and the linked information by the master unit 2 without dividing the line for the fire report and the linked information. Therefore, according to the subunit | mobile_unit 1 of the automatic fire alarm system 100 of this embodiment, there exists an advantage that the interlocking | linkage function with the other apparatus 3 can be added with a simple structure as much as possible, although it is P type.

  Hereinafter, the automatic fire alarm system 100 according to the present embodiment will be described in detail. However, the configuration described below is only an example of the present invention, and the present invention is not limited to the following embodiment, and the technical idea according to the present invention is not deviated from this embodiment. Various changes can be made in accordance with the design or the like as long as they are not.

<Overall configuration>
In this embodiment, although the case where the automatic fire alarm system 100 is used for an apartment house (apartment) is illustrated, the automatic fire alarm system 100 is not limited to an apartment house, for example, a commercial facility, a hospital, a hotel, a miscellaneous building, etc. Applicable to various buildings.

  In the automatic fire alarm system 100 of the present embodiment, as shown in FIG. 2, one master unit 2 and a plurality of slave units 101, 102, 103,... It has been. When each of the plurality of slave units 101, 102, 103... Is not particularly distinguished, it is simply referred to as “slave unit 1”.

  Furthermore, in this automatic fire alarm system 100, a pair of electric wires 51 and 52 are wired for every floor (floor) of 1-4 floors. In short, four sets of two sets of one set (two-wire type) of electric wires 51 and 52 are provided in the entire apartment house 6.

  Here, a maximum of 40 to 80 slave units 1 can be connected to each pair of electric wires 51 and 52. Further, a maximum of 50 to 200 lines (50 to 200 sets) of a pair of electric wires 51 and 52 can be connected to one base unit 2. Therefore, for example, when a maximum of 40 cordless handsets 1 can be connected to each set of wires 51 and 52, and a maximum of 50 pairs of wires 51 and 52 can be connected to one master phone 2, 1 can be connected to a maximum of 2000 (= 40 × 50) units per master unit 2. However, these numerical values are examples, and are not intended to be limited to these numerical values.

  In addition, between the terminal ends of the pair of electric wires 51 and 52 (the end portion on the side opposite to the parent device 2), the pair of electric wires 51 and 52 are electrically connected via the terminal resistor 4. Therefore, the main | base station 2 can detect the disconnection of a pair of electric wires 51 and 52 by monitoring the electric current which flows between a pair of electric wires 51 and 52. FIG. However, the termination resistor 4 is not an essential configuration and may be omitted.

  The automatic fire alarm system 100 basically detects the occurrence of a fire in the slave unit 1 including a heat detector, a smoke detector, a flame detector, and the like, and transfers from the slave unit 1 to the master unit 2 as a receiver. It is configured to notify the occurrence of a fire (fire report). However, the subunit | mobile_unit 1 may contain the transmitter etc. not only the sensor which detects generation | occurrence | production of a fire. The transmitter is a device that has a push button switch and, when a person finds a fire, manually operates the push button switch to notify the parent device 2 of the occurrence of a fire (fire report).

  In addition, when the master unit 2 receives a notification (interlocking report) for interlocking the other device 3 from the slave unit 1, the automatic fire alarm system 100 turns on the other device 3 such as a smoke prevention facility and an emergency broadcast facility. Has an interlocking function for interlocking. Therefore, the automatic fire notification system 100 can control the fire prevention door of the smoke prevention facility when a fire occurs, or can notify the occurrence of the fire by sound or voice in the emergency broadcasting facility.

  The other device 3 is configured to be able to communicate with the parent device 2 by, for example, a wired connection, and is configured to be interlocked with the automatic fire notification system 100 in response to an instruction from the parent device 2. The other devices 3 here include various devices such as fire prevention facilities such as fire doors and smoke exhaust facilities, emergency broadcast facilities, external transfer devices, and fire extinguishing facilities such as sprinklers. It is not limited to (facility). Note that the external transfer device is a device that notifies a person outside the facility where the automatic fire alarm system 100 is installed, a fire department, a security company, or the like.

  By the way, there are two types of general automatic fire notification systems: P-type (Proprietary-type) and R-type (Record-type). In the P-type automatic fire alarm system, the slave unit notifies the master unit of the occurrence of fire by electrically short-circuiting the pair of electric wires. In the R-type automatic fire system, a slave unit notifies the master unit of the occurrence of a fire through communication using a transmission signal transmitted through a transmission line.

  The automatic fire alarm system 100 of this embodiment is based on the P type. More specifically, in this embodiment, the existing wiring (electric wires 51 and 52) is used as it is in the apartment house where the P-type automatic fire alarm system was installed, and the receiver (master 2) and child Assume that the machine (slave machine 1) is replaced. Note that the automatic fire notification system 100 of the present embodiment can also be employed as a newly introduced automatic fire notification system.

  That is, the automatic fire alarm system 100 according to the present embodiment is partially P-type by using the handset 1 that can adjust the voltage value of the transmission voltage (the voltage between the pair of electric wires 51 and 52) while being P-type. , Functions similar to those of the R type are added. Specifically, in the automatic fire alarm system 100, when the alarm is issued, the slave unit 1 adjusts the voltage value of the transmission voltage to the fire alarm level or the interlock alarm level, so that the master unit 2 generates the fire alarm and the interlock alarm. It is possible to distinguish. Therefore, the automatic fire alarm system 100 can realize the fire alarm function and the interlock function on the same line, and can reduce wiring compared to the case where separate lines are provided for the fire alarm and the interlock alarm.

  Furthermore, in this embodiment, the subunit | mobile_unit 1 is comprised so that the voltage signal showing transmission data may be transmitted by switching the voltage value of a transmission voltage with a 1st level and a 2nd level alternately. . Hereinafter, a voltage signal representing transmission data is referred to as a transmission signal. That is, in the present embodiment, the slave unit 1 can communicate using the transmission signal, and can transmit data to the master unit 2. Therefore, the automatic fire alarm system 100 transmits a pair of electric wires in the master unit 2 when the slave unit 1 transmits the identifier (address) assigned in advance to the master unit 2 by a transmission signal at the time of reporting. It is possible to specify the issue source not in units of 51 and 52 but in units of one slave unit. Further, the automatic fire alarm system 100 performs communication using a transmission signal between the master unit 2 and the slave unit 1 at the time of non-reporting (normal time), so that the communication status between the master unit 2 and the slave unit 1 An automatic test can be performed on the operation of the slave unit 1.

  In addition, since the automatic fire alarm system 100 according to the present embodiment can exchange various information between the parent device 2 and the child device 1 by communication using the transmission signal, the notification is performed in units of the child device as described above. Various functions can be added in addition to the original identification and automatic test.

<Example configuration of main unit>
In the present embodiment, the master unit 2 is a P-type receiver that receives a notification of fire occurrence (fire report) and a notification (link report) for interlocking the other device 3 from the slave unit 1. Base unit 2 is installed in a management room of a building (apartment house 6).

  As shown in FIG. 1, the master unit 2 includes an application unit 21, a resistor 22, a reception unit 23, a transmission unit 24, a display unit 25 that performs various displays, and an operation that receives an operation input from a user. A unit 26 and a processing unit 27 for controlling each unit.

  The application unit 21 constantly applies a predetermined standby voltage to the pair of electric wires 51 and 52. Here, as an example, the voltage applied by the application unit 21 between the pair of electric wires 51 and 52 is 24 V DC, but the present invention is not limited to this value.

  The resistor 22 is connected between the applying unit 21 and at least one of the pair of electric wires 51 and 52. In the example of FIG. 1, the resistor 22 is inserted between one (high potential side) of the pair of electric wires 51, 52 and the application unit 21. However, not limited to this example, the resistor 22 may be inserted between the other (low potential side) electric wire 52 and the application unit 21, or both the pair of electric wires 51 and 52 and the application unit 21. Between them.

  The resistor 22 has a first function of converting a current flowing through the resistor 22 into a potential difference (voltage) between both ends of the resistor 22 by a voltage drop, and a pair of wires 51 when the pair of wires 51 and 52 are short-circuited. , 52 has a second function of limiting the current flowing through the first and second currents. In short, the resistor 22 has a first function as a current-voltage conversion element and a second function as a current limiting element. Here, as an example, the resistance value of the resistor 22 is 400Ω or 600Ω, but the value is not limited to this value.

  The receiving unit 23 and the transmitting unit 24 are both electrically connected between the resistor 22 and the pair of electric wires 51 and 52.

  The receiving unit 23 is configured to receive a voltage signal from the slave unit 1 by detecting a voltage value between the pair of electric wires 51 and 52. That is, the receiving unit 23 detects the magnitude (voltage value) of the voltage applied between the pair of electric wires 51 and 52, and the voltage between the pair of electric wires 51 and 52 is on standby in the transmission circuit 14 of the slave unit 1. When the voltage is stepped down to change to the transmission voltage, the voltage value of the changed voltage (transmission voltage) is detected. As described above, the receiving unit 23 detects the voltage value between the pair of electric wires 51 and 52, thereby reading the voltage value of the transmission voltage generated by the slave unit 1, and the voltage signal (voltage) from the slave unit 1. Change). Thereby, the receiving part 23 can receive the fire report and interlocking | reporting report from the subunit | mobile_unit 1 as a voltage signal. In other words, the receiving unit 23 receives a voltage signal corresponding to the voltage value of the transmission voltage generated by the slave unit 1 as a fire report or a linked report.

  In addition, although the receiving part 23 may detect the voltage value between a pair of electric wires 51 and 52 directly by measuring the electrical potential difference between a pair of electric wires 51 and 52, for example, it is not restricted to this structure. As another example, the receiving unit 23 may indirectly detect the voltage value between the pair of electric wires 51 and 52 based on the magnitude (current value) of the current flowing through the pair of electric wires 51 and 52. That is, the voltage value between the pair of electric wires 51 and 52 is a value obtained by subtracting the voltage value corresponding to the voltage drop at the resistor 22 (potential difference between both ends of the resistor 22) from the voltage value of the standby voltage generated at the applying unit 21. It becomes. Since both the voltage value of the standby voltage and the resistance value of the resistor 22 are known, the receiving unit 23 indirectly determines the voltage value between the pair of electric wires 51 and 52 from the magnitude of the current flowing through the pair of electric wires 51 and 52. Can be detected. In this case, the receiving part 23 detects the magnitude | size of the electric current which flows through a pair of electric wires 51 and 52, for example using shunt resistance etc.

  The transmission unit 24 transmits a communication signal to the child device 1. The transmission part 24 changes the electric current which flows into the transmission part 24 from the application part 21 through the resistor 22, and transmits the voltage signal which arises on a pair of electric wires 51 and 52 to the subunit | mobile_unit 1 as a communication signal. That is, the voltage value between the pair of electric wires 51 and 52 is a value obtained by subtracting the voltage value corresponding to the voltage drop at the resistor 22 (potential difference between both ends of the resistor 22) from the voltage value of the standby voltage generated at the applying unit 21. It becomes. Therefore, when the current flowing from the applying unit 21 to the transmitting unit 24 through the resistor 22 changes, a voltage change (voltage signal) occurs on the pair of electric wires 51 and 52 due to a voltage drop at the resistor 22. This voltage change (voltage signal) is received by the slave unit 1 as a communication signal from the master unit 2.

  When receiving a fire occurrence notification (fire report) from the slave unit 1, the master unit 2 displays the location of the fire occurrence on the display unit 25.

  The processing unit 27 has a microcomputer (microcomputer) as a main configuration, and realizes a desired function by executing a program stored in a memory. The program may be written in the memory in advance, but may be provided by being stored in a recording medium such as a memory card, or may be provided through an electric communication line.

  The base unit 2 further includes an interlocking unit 28 for interlocking the other device 3. As a result, when the master unit 2 receives the interlocking report from the slave unit 1, the master unit 2 can issue an instruction to the other device 3 from the interlocking unit 28 and cause the other device 3 to interlock.

  As described above, the base unit 2 automatically includes the slave unit 1 connected to the pair of electric wires 51 and 52 by applying a voltage (standby voltage) between the pair of electric wires 51 and 52 from the application unit 21. It functions as a power source for the operation of the entire fire alarm system 100.

  Furthermore, the base unit 2 further includes a standby power source 29 using a storage battery so that a power source for operation of the automatic fire alarm system 100 can be secured even in the event of a power failure. Base unit 2 uses a commercial power source, a private power generation facility, etc. (not shown) as a main power source. The application unit 21 automatically switches the power supply source from the main power source to the standby power source 29 when the main power source is interrupted, and automatically switches from the standby power source 29 to the main power source when the main power source is restored. The spare power supply 29 has a capacity and other specifications determined so as to satisfy the standards defined by the ministerial ordinance.

<Example configuration of slave unit>
In the present embodiment, as shown in FIG. 1, the slave unit 1 includes a diode bridge 11, a power supply circuit 12, a sensor 13, a transmission circuit 14, a reception circuit 15, a control circuit 16, and a storage unit 17. have.

  In the diode bridge 11, a pair of electric wires 51 and 52 are electrically connected to the input end side, and the power supply circuit 12, the transmission circuit 14, and the reception circuit 15 are electrically connected to the output end side. The power supply circuit 12 generates power for operation of the child device 1 from the power on the pair of electric wires 51 and 52. The sensor 13 detects the occurrence of fire or smoke.

  The control circuit 16 controls the transmission circuit 14 and the reception circuit 15 to transmit a voltage signal from the transmission circuit 14 by adjusting the voltage value of the transmission voltage according to the output of the sensor 13, or from the parent device 2. A communication signal is received by the receiving circuit 15. Here, the control circuit 16 has a microcomputer as a main component, and implements a desired function by executing a program stored in a memory. The program may be written in the memory in advance, but may be provided by being stored in a recording medium such as a memory card, or may be provided through an electric communication line.

  The control circuit 16 includes a determination unit 161 and a control unit 162. That is, in the present embodiment, the determination unit 161 that determines the operation state including the two states of the fire report state and the interlocked report state and the control unit 162 that controls the transmission circuit 14 and adjusts the voltage value of the transmission voltage are integrated. It is configured. However, not limited to this example, the determination unit 161 and the control unit 162 may be configured as separate bodies.

  The transmission circuit 14 is electrically connected to the pair of electric wires 51 and 52. The transmission circuit 14 is configured to change the voltage between the pair of electric wires 51 and 52 to a predetermined transmission voltage by stepping down from the standby voltage applied to the pair of electric wires 51 and 52. That is, the transmission circuit 14 steps down the voltage between the pair of electric wires 51 and 52 to convert (change) the voltage between the pair of electric wires 51 and 52 from the original standby voltage to a predetermined transmission voltage. In other words, the transmission circuit 14 is a constant voltage generation circuit capable of only stepping down, and controls the voltage between the pair of electric wires 51 and 52 to the transmission voltage by generating a predetermined voltage (transmission voltage).

  The transmission circuit 14 has a function of reducing the standby voltage between the pair of electric wires 51 and 52, but does not have a function of increasing the standby voltage between the pair of electric wires 51 and 52. Therefore, when the plurality of slave units 1 connected to the pair of electric wires 51 and 52 simultaneously generate transmission voltages in the respective transmission circuits 14, the voltage between the pair of electric wires 51 and 52 is set to a plurality of sub units. It becomes the lowest transmission voltage among the plurality of transmission voltages generated by the machine 1. For example, it is assumed that the two slave units 101 and 102 connected to the pair of electric wires 51 and 52 simultaneously generate transmission voltages in the respective transmission circuits 14. Here, if it is assumed that the transmission voltage generated by the transmission circuit 14 of the child device 101 is lower than the transmission voltage generated by the transmission circuit 14 of the child device 102, the voltage between the pair of electric wires 51 and 52 will be described. Is a transmission voltage generated by the transmission circuit 14 of the slave unit 101.

  Further, the transmission circuit 14 is configured such that the voltage value of the transmission voltage is not fixed to one value but can be adjusted by the control unit 162. Specifically, the transmission circuit 14 has a plurality of values including at least two values of a “fire report level” used when a fire report is generated and a “link report level” used when a linked report is generated. The voltage value of the transmission voltage is adjustable. Furthermore, as described above in this embodiment, the slave unit 1 switches the voltage value of the transmission voltage between the “first level” and the “second level” to change the voltage signal (transmission signal) representing the transmission data. ). Therefore, in this embodiment, the transmission circuit 14 is configured to be able to adjust the voltage value of the transmission voltage to at least three values.

  In the present embodiment, the transmission circuit 14 is configured by using an individual constant voltage generation circuit for each voltage value of the transmission voltage. Specifically, as shown in FIG. 1, the transmission circuit 14 includes a fire report circuit 141 for generating a fire report, a linked report circuit 142 for generating a linked report, and a transmission signal for transmitting a transmission signal. A transmission circuit 143. In other words, the fire alarm circuit 141 is a circuit that generates a transmission voltage of “fire alarm level”, the interlock alarm circuit 142 is a circuit that generates a transmission voltage of “interlock alarm level”, and the transmission circuit 143 is “the first alarm signal level”. This is a circuit for generating a “first level” or “second level” transmission voltage. The transmission circuit 14 is not limited to a configuration using an individual constant voltage generation circuit for each voltage value of the transmission voltage, and is configured by one constant voltage generation circuit that can be switched (adjusted) by the control unit 162. It may be.

  Next, a specific circuit configuration of the transmission circuit 14 will be described with reference to FIG. In FIG. 3, only the fire alarm circuit 141 of the transmission circuit 14 is shown, but the same configuration as the fire alarm circuit 141 is applied to the remaining interlocking alarm circuit 142 and transmission circuit 143. That is, the transmission circuit 14 is configured by providing a circuit having a configuration as shown in FIG. 3 for three circuits of the fire alarm circuit 141, the interlock alarm circuit 142, and the transmission circuit 143. Hereinafter, the configuration of the fire alarm circuit 141 will be described with reference to FIG. 3, and detailed description of the interlock alarm circuit 142 and the transmission circuit 143 will be omitted.

  As shown in FIG. 3, the fire alarm circuit 141 includes a constant voltage generation unit 1401 that generates a constant voltage and a switching unit 1402 that can be switched on and off. The fire alarm circuit 141 is electrically connected to the pair of electric wires 51 and 52 via the diode bridge 11. The constant voltage generation unit 1401 and the switching unit 1402 are electrically connected in series between the pair of output terminals of the diode bridge 11. Thus, if the switching unit 1402 is on, the constant voltage generation unit 1401 is electrically connected between the pair of electric wires 51 and 52, and if the switching unit 1402 is off, the constant voltage generation unit 1401 is a pair of electric wires. 51 and 52 are electrically disconnected. Therefore, when the switching unit 1402 is on, the constant voltage generation unit 1401 converts the voltage between the pair of wires 51 and 52 to a predetermined transmission voltage by stepping down from the standby voltage applied to the pair of wires 51 and 52. To change.

  In the example of FIG. 3, the constant voltage generation unit 1401 is configured by a Zener diode ZD1, and the switching unit 1402 is configured by a switching element Q1, a (first) resistor R1, and a (second) resistor R2.

  Here, the switching element Q1 is composed of an npn-type transistor, and its collector is electrically connected to the anode of the Zener diode ZD1. The cathode of the Zener diode ZD1 is electrically connected to the output terminal on the high potential side of the diode bridge 11. The emitter of the switching element Q1 is electrically connected to circuit ground (the output terminal on the low potential side of the diode bridge 11). The resistor R1 and the resistor R2 are electrically connected in series between the output terminal of the control unit 162 and the circuit ground. Furthermore, the connection point between the resistor R1 and the resistor R2 is electrically connected to the base of the switching element Q1.

  With the above configuration, when the output of the control unit 162 is “H” (high), the switching element Q1 is turned on, and the Zener diode ZD1 is electrically connected between the pair of electric wires 51 and 52. At this time, if the voltage applied between the pair of electric wires 51 and 52 exceeds the breakdown voltage (zener voltage) of the Zener diode ZD1, the voltage across the Zener diode ZD1 is maintained at the breakdown voltage of the Zener diode ZD1. Is done. As a result, the constant voltage generation unit 1401 generates a constant voltage (breakdown voltage of the Zener diode ZD1) between the pair of electric wires 51 and 52. On the other hand, if the output of the control unit 162 is “L” (low), the switching element Q1 is turned off, and the Zener diode ZD1 is electrically disconnected from the pair of electric wires 51 and 52. At this time, the voltage applied between the pair of electric wires 51 and 52 does not change.

  Therefore, when the output of the control unit 162 is “H”, the fire alarm circuit 141 determines the voltage between the pair of electric wires 51 and 52 by stepping down from the standby voltage applied to the pair of electric wires 51 and 52. The transmission voltage is changed. Here, it is the breakdown voltage of the Zener diode ZD1 that constitutes the constant voltage generation unit 1401 that defines the magnitude (voltage value) of the transmission voltage. That is, the breakdown voltage of the Zener diode ZD1 is selected according to the required voltage value of the transmission voltage.

  In the present embodiment, in the transmission circuit 14, the breakdown voltage of the Zener diode ZD1 is set individually in each of the fire alarm circuit 141, the interlock alarm circuit 142, and the transmission circuit 143. Therefore, the transmission circuit 14 transmits when the switching unit 1402 of the fire alarm circuit 141 is on, when the switching unit 1402 of the interlocking alarm circuit 142 is on, and when the switching unit 1402 of the transmission circuit 143 is on. The voltage value of the voltage can be switched. In the present embodiment, it is assumed that the transmission circuit 14 can switch the voltage value of the transmission voltage in three stages depending on which of the fire alarm circuit 141, the interlock alarm circuit 142, and the transmission circuit 143 is operated as described above. To do.

  The configuration of the fire alarm circuit 141 shown in FIG. 3 is merely an example, and the configuration of the fire alarm circuit 141 is not limited to the configuration shown in FIG. For example, the switching element Q1 is not limited to an npn transistor, but may be a pnp transistor, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), a relay, or the like. The switching unit 1402 may be configured to be turned on when the output of the control unit 162 is “L” and turned off when the output is “H”. The constant voltage generation unit 1401 may be configured using a constant voltage element other than the Zener diode ZD1.

  Thus, in the present embodiment, the transmission circuit 14 changes the standby voltage from the standby voltage to the predetermined transmission voltage by dropping the voltage between the pair of electric wires 51 and 52. And the transmission circuit 14 adjusts the magnitude | size (voltage value) of the voltage (transmission voltage) between a pair of electric wires 51 and 52 by switching the magnitude | size of the voltage to drop in multiple steps. Here, the magnitude (voltage value) of the voltage dropped by the transmission circuit 14 corresponds to a difference value between the standby voltage and the transmission voltage.

  By the way, when the voltage between the pair of electric wires 51 and 52 is changed from the standby voltage to the transmission voltage by the transmission circuit 14 having the above-described configuration, the voltage corresponding to the difference between the standby voltage and the transmission voltage is changed to the resistance 22 of the parent device 2. Will occur between both ends. Therefore, even if the output voltage of the application unit 21 of the parent device 2 remains the standby voltage, the voltage between the pair of electric wires 51 and 52 can be a transmission voltage that is stepped down from the standby voltage. At this time, the resistor 22 of the parent device 2 also functions as a current limiting resistor that limits the current flowing through the transmission circuit 14.

  The receiving circuit 15 receives a communication signal from the parent device 2 as a voltage signal (voltage change) on the pair of electric wires 51 and 52. That is, since the voltage signal is generated on the pair of electric wires 51 and 52 by changing the current flowing from the application unit 21 to the transmission unit 24 through the resistor 22 from the application unit 21, the reception circuit 15 uses this voltage signal as the parent device. To 2 as communication signals. Therefore, the receiving circuit 15 is configured to receive a communication signal from the parent device 2 by detecting a voltage value between the pair of electric wires 51 and 52. The receiving circuit 15 directly detects a voltage value between the pair of electric wires 51 and 52 by measuring a potential difference between the pair of electric wires 51 and 52, for example.

  The storage unit 17 stores at least an identifier (address) assigned in advance to the child device 1. That is, a unique identifier is assigned to each of the plurality of slave units 101, 102, 103. Each identifier is registered in the parent device 2 in association with each installation location (for example, a room number) of the plurality of child devices 101, 102, 103.

  The storage unit 17 also stores determination conditions for the determination unit 161 to determine the operation state (fire report state, interlocked report state). The determination condition is, for example, a threshold set for the output of the sensor 13 or the number of samplings.

  The determination unit 161 periodically reads the output (sensor value) of the sensor 13 and determines the operation state by referring to the determination conditions in the storage unit 17. In the present embodiment, as an example, the determination condition for the determination unit 161 to determine that the state in which the sensor value exceeds the first threshold continues for a predetermined first number of times of sampling (for example, three times) is the fire report state. Assume that Similarly, the determination unit 161 determines that the state in which the sensor value exceeds the second threshold (> first threshold) continues for a predetermined second number of times of sampling (for example, three times) as the interlocking report state. Assume that it is a judgment condition. However, the determination unit 161 starts the comparison between the sensor value and the second threshold value, for example, from the time when the determination of the fire report state is confirmed, so as to determine the interlocked report state after determining the fire report state. . These determination conditions are merely examples, and can be changed as appropriate.

  In the present embodiment, the determination unit 161 includes three states (fire report state, interlocked report state, and non-reported state) including a non-reporting state (normal state) that is neither a fire report state nor a linked report state. To determine which of the current operating states corresponds. Note that the operation state determined by the determination unit 161 is not limited to three states, and may be only two states of a fire report state and a linked report state, or may be four states or more.

  The control unit 162 controls the transmission circuit 14 according to the determination result of the determination unit 161 and adjusts the voltage value of the transmission voltage. That is, as described above, when the determination result of determination unit 161 is in the fire report state, control unit 162 adjusts the voltage value of the transmission voltage to a predetermined fire report level and generates a fire report. In addition, when the determination result of the determination unit 161 is in the linked report state, the control unit 162 adjusts the voltage value of the transmission voltage to a predetermined linked report level and generates a linked report. Here, the interlock report level is a value (voltage value) different from the fire report level, and in this embodiment, is a voltage value lower than the fire report level (fire report level> linked report level).

  Furthermore, in the present embodiment, the control unit 162 is configured to transmit a transmission signal representing transmission data by alternately switching the voltage value of the transmission voltage between the first level and the second level. Yes. Here, the second level is a value (voltage value) different from the first level and is lower than the first level (first level> second level). As described above, the transmission data is information (identifier) for specifying the issue source for each slave unit, information for automatic testing, and the like. The items of the automatic test include, for example, survival confirmation (keep alive), self-diagnosis of the slave unit 1 and the like.

  Here, as an example, the first level is the same voltage value as the fire alarm level, and the second level is a voltage value lower than the fire alarm level and higher than the interlocking alarm level (fire alarm level = first Level> second level> linked information level). In short, since the handset 1 switches the voltage value of the transmission voltage between the first level and the second level based on the fire report level (= first level), it is possible to transmit a transmission signal in the fire report state. is there.

  With this configuration, when the handset 1 determines that a fire has occurred and a fire report state has occurred, the slave unit 1 generates a fire report by adjusting the voltage value of the transmission voltage to the fire report level. Further, when determining that the slave unit 1 is in the interlocking report state, the slave unit 1 generates the interlocking report by adjusting the voltage value of the transmission voltage to the interlocking report level. Further, in the fire report state, the slave unit 1 transmits a transmission signal by alternately switching the voltage value of the transmission voltage between the first level (fire report level) and the second level.

  In the present embodiment, the slave unit 1 transmits data including at least the identifier stored in the storage unit 17 to the master unit 2 by communication using a transmission signal. For this reason, after receiving the fire report from the slave unit 1, the master unit 2 can identify the slave unit 1 that has issued the alarm from the identifier included in the transmission data represented by the transmission signal.

  Moreover, in this embodiment, the subunit | mobile_unit 1 is comprised so that transmission signal can be transmitted not only in a fire report state but in a non-reporting state. When the transmission signal is transmitted in the non-reporting state, the second level is a voltage value higher than the fire warning level, and the first level is a voltage value higher than the second level (the first level). Level> Second Level> Fire Report Level). In this case, the first level is preferably the same voltage value as the standby voltage. Accordingly, the transmission circuit 14 does not need to generate the first level transmission voltage, and can transmit the transmission signal only by generating the second level transmission voltage.

  Furthermore, in this embodiment, the subunit | mobile_unit 1 is comprised so that a transmission signal can be transmitted not only in a fire report state and a non-reporting state but in an interlocking report state. When transmitting a transmission signal in the interlocking report state, the first level is the same voltage value as the interlocking report level, and the second level is a voltage value lower than the interlocking report level (interlocking report level = first level). > Second level). However, when the voltage between the pair of electric wires 51 and 52 becomes the second level, the second level in this case is such that the slave unit 1 connected to the pair of electric wires 51 and 52 can continue the operation. It is set to at least the minimum voltage at which the handset 1 can operate.

  Thus, the combination of the first level and the second level for transmitting the transmission signal is individually set for each of the fire report state, the non-reporting state, and the interlocking report state. That is, the control unit 162 may be configured to transmit the transmission signal by alternately switching the voltage value of the transmission voltage between the first level and the second level, and the combination of the first level and the second level is There are multiple settings.

  Moreover, in this embodiment, the subunit | mobile_unit 1 has the serial circuit of the light emitting diode 18 for alerting | reporting display, and resistance R3 between a pair of electric wires 51 and 52 and the diode bridge 11, as shown in FIG. Have. As a result, when a current of a certain value or more flows from the pair of electric wires 51 and 52 into the child device 1, the light emitting diode 18 emits light. The subunit | mobile_unit 1 alert | reports to the circumference | surroundings that self is in the alerting | reporting state by the light emitting diode 18 light-emitting in a fire alert state and a linked alerting state. In FIG. 1, the light emitting diode 18 and the resistor R3 are not shown.

<Operation>
Hereinafter, the operation of the automatic fire alarm system 100 according to the present embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing the operation of the control circuit (determination unit 161 and control unit 162) 16. FIG. 6 represents the voltage between the pair of electric wires 51 and 52 with the horizontal axis representing the time axis and the vertical axis representing the voltage value. In FIG. 6, the handset 1 switches the voltage value of the transmission voltage, so that the voltage value of the voltage between the pair of electric wires 51 and 52 is changed from the standby voltage value V0 to V1, V2, V3, V4, and V5. It is assumed that it can be lowered step by step (V0>V1>V2>V3>V4> V5).

  First, the base unit 2 applies a standby voltage between the pair of electric wires 51 and 52 from the applying unit 21 at the time of non-reporting (normal time). In this state, the voltage value of the voltage between the pair of electric wires 51 and 52 is “V0” as shown in FIG.

  In the slave unit 1, the determination unit 161 periodically reads the sensor value at a predetermined sampling period (S1 in FIG. 5), and determines whether or not it is in a fire report state (S2). If it is not in the fire report state (S2: No), handset 1 determines that it is in the non-reporting state and repeats reading of sensor values (S1) in determination unit 161. In a non-reporting state (a state in which neither a fire report nor a linked report is generated), the handset 1 basically does not step down from the standby voltage. Therefore, if all the subunit | mobile_units 1 are a non-reporting state, the voltage between a pair of electric wires 51 and 52 will be basically "V0" as shown in FIG. FIG. 6 shows an example in which all the slave units 1 are in a non-reporting state during the period from time t0 to t2.

  Further, the slave unit 1 has a function of transmitting a transmission signal representing transmission data from the transmission circuit 14 by alternately switching the voltage value of the transmission voltage between the first level and the second level in the non-reporting state. doing. The first level and the second level here are the first level and the second level when the slave unit 1 transmits a transmission signal in the non-reporting state, that is, “first level> second level> fire report”. It is a value that becomes “level”. When the transmission signal is transmitted in the non-reporting state, the slave unit 1 performs transmission signal transmission processing before the processing S1 in FIG. 5 or between the processing S1 and the processing S2.

  Therefore, even if all the slave units 1 are in a non-reporting state, any one of the slave units 1 transmits a transmission signal, so that the voltage between the pair of electric wires 51 and 52 is binary ( The first level V0 and the second level V1) are alternately switched. In the example of FIG. 6, the first level when transmitting a transmission signal in the non-reporting state is “V0” that is the same value as the standby voltage, and the second level is “V1” that is lower than “V0”. There are (first level = V0, second level = V1). FIG. 6 shows an example in which the voltage value between the pair of electric wires 51 and 52 is switched between “V0” and “V1” when one of the slave units 1 transmits a transmission signal during the period of time t1 to t2. ing.

  Next, in any of the slave units 1, when the read sensor value satisfies the predetermined determination condition and the determination of the fire report state is confirmed (S2 in FIG. 5: Yes), the control unit 162 determines the voltage of the transmission voltage. The value is adjusted to the fire alarm level (S3). Thereafter, in the slave unit 1, the determination unit 161 periodically reads the sensor value at a predetermined sampling period (S4), and determines whether or not it is in the interlocking report state (S5). If it is not in the interlocking report state (S5: No), the slave unit 1 repeatedly reads the sensor value (S4) in the determination unit 161 while maintaining the voltage value of the transmission voltage at the fire report level (S3). In the example of FIG. 6, the fire report level is “V2” (fire report level = V2). Therefore, when the determination result in any of the slave units 1 shifts from the non-reporting state to the fire reporting state, the voltage value between the pair of electric wires 51 and 52 decreases from “V0” to “V2” as shown in FIG. . FIG. 6 shows an example in which one of the handset 1 is in a fire report state during the period from time t2 to time t4.

  Furthermore, the subunit | mobile_unit 1 has a function which transmits the transmission signal showing transmission data from the transmission circuit 14 by switching the voltage value of a transmission voltage alternately with a 1st level and a 2nd level in a fire report state. ing. Here, the first level and the second level are the first level and the second level when the slave unit 1 transmits a transmission signal in the fire alert state, that is, “fire alert level = first level> second level”. It is a value of “> Linked Report Level”. When transmitting a transmission signal in the fire report state, the slave unit 1 performs a transmission signal transmission process before the process S4 in FIG. 5 or between the processes S4 and S5.

  Therefore, even if all the slave units 1 are in a fire report state, any one of the slave units 1 transmits a transmission signal, so that the voltage between the pair of electric wires 51 and 52 is binary (first) as shown in FIG. The first level V2 and the second level V3) are alternately switched. In the example of FIG. 6, the first level when transmitting a transmission signal in the fire alert state is “V2” which is the same value as the fire alert level, and the second level is “V3” which is lower than “V2”. Yes (first level = V2, second level = V3). FIG. 6 shows an example in which the voltage value between the pair of electric wires 51 and 52 is switched between “V2” and “V3” when one of the slave units 1 transmits a transmission signal during the period of time t3 to t4. ing.

  Next, in any of the slave units 1, when the read sensor value satisfies the predetermined determination condition and the determination of the interlocking report state is confirmed (S5: Yes in FIG. 5), the control unit 162 determines the voltage of the transmission voltage. The value is adjusted to the linked report level (S6). In the example of FIG. 6, the linked report level is “V4” (linked report level = V4). Therefore, when the determination result in any of the slave units 1 shifts from the fire report state to the linked report state, the voltage value between the pair of electric wires 51 and 52 decreases from “V2” to “V4” as shown in FIG. FIG. 6 shows an example in which one of the slave units 1 is in the interlocking report state during a period after time t4.

  Further, the slave unit 1 has a function of transmitting a transmission signal representing transmission data from the transmission circuit 14 by alternately switching the voltage value of the transmission voltage between the first level and the second level in the linked information state. ing. Here, the first level and the second level are the first level and the second level when the handset 1 transmits a transmission signal in the linked information state, that is, “linked information level = first level> second level”. Is a value. When transmitting a transmission signal in the fire report state, the slave unit 1 performs transmission signal transmission processing after step S6 in FIG.

  Therefore, even if all the slave units 1 are in the linked information state, any one of the slave units 1 transmits a transmission signal, so that the voltage between the pair of electric wires 51 and 52 is binary (first) as shown in FIG. The first level V4 and the second level V5) are alternately switched. In the example of FIG. 6, the first level when transmitting a transmission signal in the fire report state is “V4” which is the same value as the interlocking report level, and the second level is “V5” which is lower than “V4”. Yes (first level = V4, second level = V5). FIG. 6 shows an example in which the voltage value between the pair of electric wires 51 and 52 is switched between “V4” and “V5” when one of the slave units 1 transmits a transmission signal during the period of time t5 to t6. ing.

  In this embodiment, as an example, the standby voltage value V0 is 22 to 24 [V], the second level V1 in the non-reporting state is 17 to 21 [V], and the fire warning level V2 is 14 to 16 [V]. V] and the second level V3 in the fire report state is assumed to be 11 to 13 [V]. Further, it is assumed that the interlocking report level V4 is 8 to 10 [V] and the second level V5 in the interlocking report state is 5 to 7 [V]. However, these specific numerical values are not intended to limit the embodiment, and can be appropriately changed. That is, in the present embodiment, the transmission voltage value is allowed to vary within a predetermined allowable range. In the main unit 2, if the voltage value of the voltage between the pair of electric wires 51 and 52 is within each allowable range, whether the operation state of the sub unit 1 at that time is a fire report state or a linked report state Can be distinguished.

  Moreover, in this embodiment, although the structure which the subunit | mobile_unit 1 can transmit a transmission signal in any of a non-reporting state, a fire reporting state, and a interlocking reporting state was illustrated, this structure is only an example and transmission is carried out. The function of transmitting a signal is not an essential function for the slave unit 1. Furthermore, even if the subunit | mobile_unit 1 has a function which transmits a transmission signal, even if it can transmit a transmission signal only in one state or two states in a non-reporting state, a fire reporting state, and a linked reporting state, Good.

<Effect>
According to the handset 1 of the automatic fire notification system 100 of the present embodiment described above, the control unit 162 controls the transmission circuit 14 according to the determination result of the determination unit 161 to adjust the voltage value of the transmission voltage. , Fire and linked reports. That is, the subunit | mobile_unit 1 is changing the voltage between a pair of electric wires 51 and 52 by the pressure | voltage fall from standby voltage, and the magnitude | size (voltage value) of the voltage (transmission voltage) between a pair of electric wires 51 and 52 after a change. ) Is switched between the fire report level and the linked report level. Thereby, the subunit | mobile_unit 1 transmits the voltage signal which can distinguish fire information and interlocking information.

  For this reason, in the automatic fire notification system 100 using the child device 1, it is possible to distinguish between the fire information and the linked information by the master unit 2 without dividing the line for the fire report and the linked information. Therefore, according to the subunit | mobile_unit 1 of the automatic fire alarm system 100 of this embodiment, there exists an advantage that the interlocking | linkage function with the other apparatus 3 can be added with a simple structure as much as possible, although it is P type.

  Further, as in the present embodiment, it is preferable that the interlocking report level is a voltage value lower than the fire alarm level. According to this configuration, the slave unit 1 first reduces the voltage value of the transmission voltage to the fire report level when the fire alarm state is set, and further decreases the voltage value of the transmission voltage when the interlock report state is set. Can be adjusted to level. In other words, the slave unit 1 can perform the fire report and the linked report by gradually reducing the voltage value of the transmission voltage in accordance with the transition from the non-reported state to the fire reported state and further to the linked report state. .

  Further, as in the present embodiment, the control unit 162 switches the voltage value of the transmission voltage between the first level and the second level lower than the first level, thereby transmitting the transmission signal representing the transmission data. Is preferably configured to transmit. According to this configuration, the handset 1 can transmit information (identifier) for identifying the reporting source in units of handset 1 or information for automatic testing to the base unit 2 as described above. it can.

  In this case, the second level is preferably a voltage value higher than the fire alarm level as in the present embodiment. The second level here is the second level when transmitting a transmission signal in a non-reporting state. According to this configuration, in the non-reporting state, even when the slave unit 1 transmits a transmission signal, the voltage dropped by the transmission circuit 14 is smaller than that in the fire reporting state, and the pair of electric wires 51 and 52 Therefore, the current drawn into the slave unit 1 is also reduced. Therefore, there exists an advantage that the consumption current in the subunit | mobile_unit 1 at the time of transmission of the transmission signal in a non-reporting state is suppressed. Furthermore, since the current drawn into the handset 1 from the pair of electric wires 51 and 52 is reduced, the light emitting diode 18 for alarm display (see FIG. 4) is erroneously displayed when transmitting the transmission signal in the non-reporting state. There is also an advantage that lighting is prevented.

  Further, as in this embodiment, the first level is the same voltage value as the fire alarm level, and the second level is lower than the fire alarm level and higher than the interlock alarm level. Preferably there is. The first level and the second level here are the first level and the second level when transmitting a transmission signal in the fire report state. According to this configuration, the slave unit 1 switches the voltage value of the transmission voltage between the first level and the second level with reference to the fire report level (= first level) when transmitting the transmission signal. It is possible to transmit a transmission signal at. Accordingly, the slave unit 1 can transmit information (identifier) for specifying the reporting source to the master unit 2 immediately after the fire report is generated, for example, for each slave unit.

  Further, as in the present embodiment, it is preferable that the first level has the same voltage value as the interlocking report level, and the second level has a voltage value lower than the interlocking report level. The first level and the second level here are the first level and the second level in the case where the transmission signal is transmitted in the linked information state. According to this configuration, when the transmission signal is transmitted, the transmission voltage is switched between the first level and the second level with reference to the interlocking report level (= first level), so the transmission signal is transmitted in the interlocking report state. Is possible. Accordingly, the slave unit 1 can transmit information (identifier) for identifying the reporting source to the master unit 2 immediately after generating the linked report, for example, for each slave unit.

  The automatic fire alarm system 100 according to the present embodiment includes any one of the slave units 1 and the master unit 2 that applies the standby voltage between the pair of electric wires 51 and 52. The base unit 2 is configured to detect a voltage value between the pair of electric wires 51 and 52. According to this configuration, the master unit 2 reads the voltage value of the transmission voltage generated by the slave unit 1, receives the voltage signal (voltage change) from the slave unit 1, The interlocking report can be received as a voltage signal. Therefore, according to this automatic fire alarm system 100, there is an advantage that an interlocking function with the other device 3 can be added with a simple configuration as much as possible while being P-type.

(Embodiment 2)
The subunit | mobile_unit 1 of the automatic fire notification system 100 which concerns on this embodiment is the point which the operation period of the control part 162 is time-divided into the transmission period and the alerting | reporting period, and the subunit | mobile_unit of the automatic fire notification system 100 of Embodiment 1 1 and different. Hereinafter, the same configurations as those of the first embodiment are denoted by common reference numerals, and description thereof will be omitted as appropriate.

  In the present embodiment, the control unit 162 is configured to perform transmission of transmission signals during the transmission period, and to generate fire or interlocking reports during the notification period. In other words, the control unit 162 does not generate a fire report or a linked report during the transmission period, and does not transmit a transmission signal during the notification period.

  Specifically, in the present embodiment, the base unit 2 periodically generates a synchronization signal. When the slave device 1 receives the synchronization signal from the master device 2, the slave device 1 operates for a certain period in synchronization with the synchronization signal. Here, as shown in FIG. 7, the operation period of the control unit 162 is time-divided into a reception period T1 for receiving a synchronization signal, a transmission period T2, and a notification period T3.

  Therefore, for example, when any one of the slave units 1 is in a fire report state, a period in which the slave unit 1 transmits a transmission signal (transmission period T2) and a period in which a linked report is generated (notification period T3) are clearly distinguished. Is done. Therefore, the main unit 2 can reliably distinguish the transmission signal from the sub unit 1 from the fire report, the interlock report, and the like.

  According to the slave unit 1 of the automatic fire notification system 100 of the present embodiment described above, the operation period of the control unit 162 is divided into a transmission period and a notification period. There is an advantage that interference with the notification can be avoided. Therefore, the fire report level and the interlock report level can be set relatively freely without considering interference with the transmission signal.

  Other configurations and functions are the same as those of the first embodiment.

(Embodiment 3)
The handset 1 of the automatic fire alarm system 100 according to the present embodiment has the automatic fire according to the first embodiment in that the second level when the transmission signal is transmitted in the non-reporting state is the same voltage value as the fire alarm level. This differs from the slave unit 1 of the notification system 100. Note that the first level and the second level in the present embodiment mean the first level and the second level when the transmission signal is transmitted in the non-reporting state. Hereinafter, the same configurations as those of the first embodiment are denoted by common reference numerals, and description thereof will be omitted as appropriate.

  That is, in this embodiment, the subunit | mobile_unit 1 transmits a transmission signal by switching the voltage value of a transmission voltage with a 1st level and a 2nd level (= fire alarm level) in a non-reporting state alternately. . In this case, the first level is preferably the same voltage value as the standby voltage. In the example of FIG. 6, in the period t1 to t2 during which the transmission signal is transmitted in the non-reporting state, the slave unit 1 switches the transmission signal between “V0” and “V2” alternately. Can be sent.

  According to the configuration of the present embodiment, the slave unit 1 can generate the second level transmission voltage by using the fire alarm circuit 141 without using the transmission circuit 143 in the non-reporting state. That is, in the non-reporting state, the transmission circuit 14 generates a transmission voltage having the same value (fire report level = second level) when a fire report occurs and when a transmission signal is transmitted. The information circuit 141 and the transmission circuit 143 can be combined into one circuit. As a result, the transmission circuit 14 can be simplified. In particular, if the first level is the same voltage value as the standby voltage, the transmission circuit 14 does not need to generate the first level transmission voltage, and therefore only one circuit (fire report circuit 141) is not triggered. Thus, it is possible to generate a fire report and transmit a transmission signal.

  Other configurations and functions are the same as those of the first embodiment. Note that the configuration described in this embodiment can also be applied in combination with the configuration described in Embodiment 2.

(Embodiment 4)
The handset 1 of the automatic fire notification system 100 according to the present embodiment is the automatic fire notification of the first embodiment in that the second level when transmitting a transmission signal in the fire report state is the same voltage value as the interlocking report level. This is different from the slave unit 1 of the system 100. Note that the first level and the second level in the present embodiment mean the first level and the second level when the transmission signal is transmitted in the fire report state. Hereinafter, the same configurations as those of the first embodiment are denoted by common reference numerals, and description thereof will be omitted as appropriate.

  That is, in this embodiment, the subunit | mobile_unit 1 transmits a transmission signal by switching the voltage value of a transmission voltage alternately with a 1st level and a 2nd level (= interlocking | reporting report level) in a fire report state. Further, the interlocking report level is preferably a voltage value lower than the fire report level, and the first level is preferably the same voltage value as the fire report level. In the example of FIG. 6, the slave unit 1 transmits the transmission signal by alternately switching the transmission voltage between “V2” and “V4” in the period t3 to t4 during which the transmission signal is transmitted in the fire report state. can do.

  According to the configuration of the present embodiment, the slave unit 1 can generate the second level transmission voltage by using the interlocking report circuit 142 without using the transmission circuit 143 in the fire report state. That is, in the fire report state, the transmission circuit 14 generates a transmission voltage having the same value (linked report level = second level) when the linked report is generated and when the transmission signal is transmitted. The circuit 142 and the transmission circuit 143 can be combined into one circuit. As a result, the transmission circuit 14 can be simplified.

  Further, if the first level is the same voltage value as the fire alarm level, the slave unit 1 can use the fire alarm circuit 141 in the fire alarm state without using the transmission circuit 143 to transmit the first level transmission voltage. Can be generated. That is, the transmission circuit 14 generates a transmission voltage of the same value (fire report level = first level) when a fire report occurs and when a transmission signal is transmitted, and therefore generates a first level transmission voltage. A circuit for doing so is unnecessary. As a result, if the transmission circuit 14 has the fire report circuit 141 and the interlock report circuit 142, the transmission signal can be transmitted in the fire report state without the transmission circuit 143. Further simplification of the transmission circuit 14 is possible.

  Other configurations and functions are the same as those of the first embodiment. Note that the configuration described in this embodiment can also be applied in combination with the configurations described in Embodiment 2 and Embodiment 3.

DESCRIPTION OF SYMBOLS 1 Slave unit 14 Transmission circuit 161 Judgment part 162 Control part 2 Master unit 3 Other apparatus 51,52 Electric wire 100 Automatic fire alarm system

Claims (10)

A transmission circuit that is electrically connected to a pair of electric wires to which a standby voltage is applied, and changes a voltage between the pair of electric wires to a predetermined transmission voltage by stepping down from the standby voltage;
A determination unit for determining an operation state including two states of a fire report state for notifying the occurrence of a fire and a linked report state for interlocking other devices;
A control unit for controlling the transmission circuit and adjusting a voltage value of the transmission voltage;
The controller is
When the judgment result of the judgment unit is in the fire report state, the fire voltage is generated by adjusting the voltage value of the transmission voltage to a predetermined fire report level,
When the determination result of the determination unit is in the interlocking report state, the transmission voltage is adjusted to a predetermined interlocking report level different from the fire alarm level to generate the interlocking report. A slave unit of the featured automatic fire alarm system. The controller is
The transmission voltage representing the transmission data is transmitted by alternately switching the voltage value of the transmission voltage between a first level and a second level lower than the first level. The subunit | mobile_unit of the automatic fire alarm system of Claim 1 to do. The slave of the automatic fire alarm system according to claim 2, wherein the second level is a voltage value higher than the fire alarm level. The slave unit of the automatic fire alarm system according to claim 2, wherein the second level has the same voltage value as the fire alarm level. The first level is the same voltage value as the fire alarm level,
The child machine of the automatic fire alarm system according to claim 2, wherein the second level is a voltage value lower than the fire alarm level and higher than the interlock alarm level. The slave unit of the automatic fire alarm system according to claim 2, wherein the second level has the same voltage value as the interlocking alarm level. The first level is the same voltage value as the interlocking report level,
The slave unit of the automatic fire alarm system according to claim 2, wherein the second level is a voltage value lower than the interlocking alarm level. The slave unit of the automatic fire alarm system according to any one of claims 1 to 7, wherein the interlocking alarm level is a voltage value lower than the fire alarm level. The linkage level is a voltage value lower than the fire level,
The first level is the same voltage value as the fire alarm level,
The slave unit of the automatic fire alarm system according to claim 2, wherein the second level has the same voltage value as the interlocking alarm level. The subunit | mobile_unit of any one of Claims 1-9,
A master unit that applies the standby voltage to the pair of electric wires;
The automatic fire alarm system, wherein the base unit is configured to detect a voltage value between the pair of electric wires.

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