JP2015207127A - Slave unit of automatic fire alarm system and automatic fire alarm system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slave unit of an automatic fire alarm system capable of adding an interlocking function with other devices even when it is a P-type, with as simple a configuration as possible, and an automatic fire alarm system using the same.SOLUTION: A transmission circuit 14 is electrically connected to a pair of electric wires 51, 52 to which a voltage is applied, and draws a current from the pair of electric wires 51, 52 as a drawing current. A determination unit 161 determines an operation state including two states of a fire notification state for notifying breakout of a fire and an interlocked notification state for interlocking other devices. A control unit 162, when a determination result of the determination unit 161 becomes the fire notification state, generates fire notification by adjusting the current level of the drawing current to a predetermined fire notification level. Also, the control unit 162 is configured so that, when the determination result of the determination unit 161 becomes the interlocked notification state, it generates interlocked notification by adjusting the current value of the drawing current to a predetermined interlocked notification level different from the fire notification level.

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 occurrence 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 uses a slave unit of an automatic fire alarm system capable of adding an interlocking function with another device while being P-type with a simple configuration as much as possible. The purpose is to provide an automatic fire alarm system.

  The slave unit of the automatic fire notification system of the present invention is electrically connected to a pair of electric wires to which a voltage is applied, a transmission circuit that draws current from the pair of electric wires as a drawing current, and a fire report that notifies the occurrence of a fire. And a control unit that controls the transmission circuit and adjusts the current value of the current drawn, the control unit comprising: When the determination result of the determination unit is in the fire report state, a fire report is generated by adjusting the current value of the drawn current to a predetermined fire report level, and when the determination result of the determination unit is in the interlocked report state The current value of the pull-in current is adjusted to a predetermined interlocking report level different from the fire alarm level, and the interlocking report is generated.

  An automatic fire alarm system according to the present invention includes the above slave unit and a master unit that applies a voltage between the pair of electric wires.

  The present invention has an advantage that it is possible to add an interlocking function with other devices while being P-type with a simple configuration as much as possible.

It is explanatory drawing which shows schematic structure of the automatic fire alarm system which concerns on Embodiment 1. FIG. It is explanatory drawing which shows the whole structure of the automatic fire alerting | reporting system which concerns on Embodiment 1. FIG. It is a schematic circuit diagram which shows the subunit | mobile_unit 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 1. FIG. It is explanatory drawing of operation | movement of the automatic fire alarm system which concerns on Embodiment 1. FIG. It is explanatory drawing of operation | movement of the automatic fire alarm system which concerns on Embodiment 2. FIG. It is a schematic circuit diagram which shows the subunit | mobile_unit of the automatic fire alarm system which concerns on Embodiment 3.

(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 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 a pair of electric wires 51 and 52 to which a voltage is applied, and is configured to draw current from the pair of electric wires 51 and 52 as an incoming current.

  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 control unit 162 controls the transmission circuit 14 and adjusts the current value of the drawing current.

  Here, when the determination result of the determination unit 161 is in the fire report state, the control unit 162 adjusts the current value of the drawn current to a predetermined fire report level and generates a fire report. Further, the control unit 162 is configured to adjust the current value of the drawn current to a predetermined linked report level different from the fire report level and generate the linked report when the determination result of the determining unit 161 is in the linked report state. ing.

  That is, in the handset 1 of the automatic fire notification 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 current value of the drawn current. Report and linked report. In short, the slave unit 1 can distinguish between the fire report and the linked report by switching the magnitude (current value) of the current drawn (flowed in) from the pair of electric wires 51 and 52 between the fire report level and the linked report level. The correct current signal.

  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. Fire notification (fire report) is made. 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 has a push button switch (not shown) and, when a person finds a fire, manually operates the push button switch to notify the master unit 2 of the occurrence of a fire (fire report). It is.

  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). The external transfer device is a device that notifies external parties, fire fighting organizations, security companies, and 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 uses the handset 1 that can adjust the current value of the incoming current (the current drawn by the transmission circuit 14 from the pair of electric wires 51 and 52) while being P-type. In part, the same functions as those of the R type are added. Specifically, the automatic fire alarm system 100 adjusts the current value of the drawn current to the fire alarm level or the interlock alarm level at the time of the alarm, so that the master apparatus 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 transmission signal showing transmission data may be transmitted by increasing / decreasing the electric current value of a drawing current between a 1st level and a 2nd level. . 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 the identifier (address) previously assigned to the slave unit 1 to the master unit 2 at the time of reporting, for example, so that the unit unit of the pair of electric wires 51 and 52 in the master unit 2 Instead, it is possible to specify the reporting source by a single unit. In addition, the automatic fire alarm system 100 communicates between the master unit 2 and the slave unit 1 and communicates between the master unit 2 and the slave unit 1 and the operation of the slave unit 1 at the time of non-reporting (normal time). Automatic testing can be performed on

  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 using communication, the notification source for each child device as described above is used. Various functions can be added without being limited to the identification and automatic test.

<Configuration of base 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 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 receiving unit 23 receives a voltage signal obtained by converting a current signal from the child device 1 into a voltage change on the pair of electric wires 51 and 52 due to a voltage drop at the resistor 22. The transmission unit 24 transmits a transmission signal to the child device 1.

  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 as a main component, and implements a desired function by executing a program stored in a memory (not shown). Note that the program may be written in the memory in advance, or may be provided by being stored in a storage medium such as a memory card.

  The base unit 2 also has 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 applies the voltage between the pair of electric wires 51 and 52 from the application unit 21, thereby including the slave unit 1 connected to the pair of electric wires 51 and 52. Functions as a power supply for the entire operation. 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.

  Furthermore, the master unit 2 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.

  In addition, the resistor 22 has a first function for converting the current signal transmitted from the slave unit 1 into a voltage signal as described above, and the pair of wires 51 and 52 when the pair of wires 51 and 52 are short-circuited. It has two functions, a second function for limiting the flowing current. 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 electrically connected between the resistor 22 and the pair of electric wires 51 and 52. However, the receiving unit 23 is not limited to the configuration connected between the resistor 22 and the pair of electric wires 51 and 52, and may be electrically connected between the applying unit 21 and the resistor 22, for example.

  Here, the receiving part 23 receives the current signal from the subunit | mobile_unit 1 as a voltage signal (voltage change) on a pair of electric wires 51 and 52. FIG. That is, the current value of the current drawn from the pair of electric wires 51 and 52 by the handset 1 (drawing current) corresponds to the magnitude of the voltage drop at the resistor 22. And interlocking reports can be received as voltage signals. In other words, the receiving unit 23 receives a voltage signal corresponding to the current value of the drawn current in the slave unit 1 as a fire report or a linked report.

  The transmission part 24 transmits the electric current signal which arises on a pair of electric wires 51 and 52 by changing the electric current which flows in from a pair of electric wires 51 and 52 to the subunit | mobile_unit 1 as a transmission signal. The current signal sent (generated) by the transmitter 24 onto the pair of electric wires 51 and 52 is converted into a voltage signal by a voltage drop at the resistor 22, and the slave unit 1 outputs a voltage signal as a transmission signal from the master unit 2. Receive. In other words, the voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the transmission unit 24 changes the current flowing from the pair of electric wires 51 and 52 is received by the slave unit 1 as a voltage signal. It will be.

<Configuration of slave unit>
The subunit | mobile_unit 1 has the diode bridge | bridging 11, the power supply circuit 12, the sensor 13, the transmission circuit 14, the receiving circuit 15, the control circuit 16, and the memory | storage part 17. FIG.

  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 a fire.

  The control circuit 16 controls the transmission circuit 14 and the reception circuit 15 to transmit a current signal from the transmission circuit 14 by adjusting the current value of the drawn current according to the output of the sensor 13, or from the parent device 2. A transmission signal is received by the receiving circuit 15. Here, the control circuit 16 has a microcomputer as a main component, and realizes a desired function by executing a program stored in a memory (not shown). Note that the program may be written in the memory in advance, or may be provided by being stored in a storage medium such as a memory card.

  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 current value of the drawn current 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.

  Here, the transmission circuit 14 is configured to transmit the current value of the current drawn from the pair of electric wires 51 and 52 (drawn current) to the parent device 2 as a current signal. The current signal sent (generated) on the pair of electric wires 51 and 52 by the transmission circuit 14 is converted into a voltage signal by a voltage drop at the resistor 22, and the parent device 2 receives the voltage signal as a signal from the child device 1. To do. In other words, when the transmission circuit 14 adjusts the current value of the drawing current drawn from the pair of electric wires 51 and 52, a voltage signal corresponding to the current value is received by the parent device 2.

  FIG. 3 shows a specific example of the transmission circuit 14. That is, as shown in FIG. 3, the transmission circuit 14 has a first lead-in part 141 and a second lead-in part 142, so that current is drawn in the first lead-in part 141 and the second lead-in part 142, respectively. It is configured.

  The first lead-in portion 141 includes a (first) semiconductor element 143, a (first) resistor 144, and a light emitting diode (LED) 145 that are electrically connected between the pair of output terminals of the diode bridge 11. And a series circuit. The second lead-in part 142 has a series circuit of a (second) semiconductor element 146 and a (second) resistor 147 electrically connected between a pair of output terminals of the diode bridge 11.

  Here, each of the semiconductor elements 143 and 146 is an npn transistor, and the collector is electrically connected to the output terminal on the high potential side of the diode bridge 11. Furthermore, the emitter of the semiconductor element 143 is electrically connected to the circuit ground (the output terminal on the low potential side of the diode bridge 11) via the resistor 144 and the light emitting diode 145. The emitter of the semiconductor element 146 is electrically connected to the circuit ground (the output terminal on the low potential side of the diode bridge 11) via the resistor 147. The bases of the semiconductor elements 143 and 146 are electrically connected to the control unit 162, respectively. The semiconductor elements 143 and 146 are not limited to npn transistors, but may be pnp transistors, for example.

  As a result, the transmission circuit 14 draws current in the first drawing unit 141 when the semiconductor element 143 is turned on by the control unit 162, and the second drawing unit 142 when the semiconductor element 146 is turned on by the control unit 162. The current is drawn with. Therefore, the transmission circuit 14 has a current of the drawn current when the current is drawn only by the first drawing portion 141 and when the current is drawn by both the first drawing portion 141 and the second drawing portion 142. You can change the value.

  Furthermore, by switching the base current of the semiconductor element 143 in two stages, the current value of the current drawn by the first lead-in part 141 can be switched in two stages. Similarly, by switching the base current of the semiconductor element 146 in two stages, the current value of the current drawn by the second lead-in part 142 can be switched in two stages. In this embodiment, the transmission circuit 14 can adjust the current value in four stages in total, that is, two stages with the first lead-in part 141 and two stages with the second lead-in part 142 in this way. In the following, it is assumed that the slave unit 1 can raise the current value of the pull-in current in four steps by switching the current value of the pull-in current in the transmission circuit 14.

  Note that the transmission circuit 14 can turn on the light emitting diode 145 when the first drawing unit 141 draws current. The light emitting diode 145 is disposed at a position that is visible from the outside of the slave unit 1 and has a function of notifying that the slave unit 1 is in a fire report state by turning on.

  The receiving circuit 15 receives a transmission signal from the parent device 2 as a voltage signal (voltage change) on the pair of electric wires 51 and 52. That is, the current signal sent (generated) on the pair of electric wires 51 and 52 by the parent device 2 is converted into a voltage signal by the voltage drop at the resistor 22, so that the receiving circuit 15 transmits the signal from the parent device 2. A voltage signal is received as a signal. In other words, the receiving circuit 15 receives, as a voltage signal, a voltage change (voltage signal) that occurs on the pair of electric wires 51 and 52 when the parent device 2 changes the current flowing from the pair of electric wires 51 and 52. become.

  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 of the determination condition, the determination unit 161 determines that the state is a fire report state when a state in which the sensor value exceeds the first threshold continues for a predetermined first number of times of sampling (for example, three times). Assume that Similarly, when 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), the determination unit 161 determines that it is in the interlocking report state. Assume. 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 to adjust the current value of the drawn current. That is, as described above, when the determination result of the determination unit 161 is in the fire report state, the control unit 162 adjusts the current value of the drawn current 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 current value of the drawn current to a predetermined interlocking report level and generates the interlocking report. Here, the interlock report level is a value (current value) different from the fire report level, and in this embodiment, the current value is larger than the fire report level (interlock report level> fire report level).

  Furthermore, in this embodiment, the control part 162 transmits the transmission signal showing transmission data from the transmission circuit 14 by increasing / decreasing the electric current value of drawing current between the binary of a 1st level and a 2nd level. It is configured as follows. 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, it is assumed that the first level is the same value as the fire alert level, and the second level is greater than the fire alert level and smaller than the interlock alert level (fire alert level = first level <second level). <Linked report level). In short, since the handset 1 increases or decreases the current value of the drawn current based on the fire report level, it is possible to transmit a transmission signal in the fire report state. 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. That is, the subunit | mobile_unit 1 transmits the transmission signal showing transmission data from the transmission circuit 14 by increasing / decreasing the electric current value of the drawing current between the 2nd level smaller than a fire alarm level, and a 1st level still smaller. can do.

  With this configuration, when the handset 1 is determined to be in a fire report state due to a fire, the slave unit 1 generates a fire report by adjusting the current value of the drawn current 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 current value of the drawn current to the interlocking report state. Further, in the fire report state, the slave unit 1 transmits a transmission signal by increasing or decreasing the current value of the drawn current 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.

<Operation>
Hereinafter, the operation of the automatic fire notification system 100 according to the present embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a flowchart showing the operation of the control circuit (determination unit 161 and control unit 162) 16. FIG. 5 represents the current flowing through the pair of electric wires 51 and 52 with the horizontal axis as the time axis and the vertical axis as the current value. In FIG. 5, when the slave unit 1 switches the current value of the drawing current, the current value of the current flowing through the pair of electric wires 51 and 52 is changed in four steps from the base currents I0 to I1, I2, I3, and I4. Assume that it can be pulled up (I0 <I1 <I2 <I3 <I4).

  First, at the time of non-reporting (normal time), the base unit 2 applies a constant voltage (for example, DC 24V) between the application unit 21 and the pair of electric wires 51 and 52.

  In the child device 1, the determination unit 161 periodically reads the sensor value at a predetermined sampling period (S1 in FIG. 4), 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 in determination unit 161. In the non-reporting state, the handset 1 basically does not draw current, and the current value of the drawn current is 0 (zero). Therefore, if all the subunit | mobile_units 1 are a non-reporting state, the electric current which flows through a pair of electric wires 51 and 52 will be only the part for the electric current which flows through the termination resistance 4, and the electric current value of the electric current which flows through a pair of electric wires 51 and 52 is Basically, it is “I0” as shown in FIG. In the example of FIG. 5, all the subunit | mobile_units 1 are a non-reporting state in the period of time t0-t3.

  Here, the current value I0 is the standby current flowing through the pair of electric wires 51 and 52 when all the slave units 1 are in the non-reporting state (when neither the fire report nor the interlocking report is generated). Current value. This standby current is used to detect disconnection of the pair of electric wires 51 and 52 in the master unit 2, and when the standby current does not flow, the master unit 2 disconnects the pair of electric wires 51 and 52. Judge that

  However, in this embodiment, the subunit | mobile_unit 1 represents transmission data from the transmission circuit 14 by increasing / decreasing the electric current value of a drawing-in current between the 1st level and the 2nd level in a non-reporting state. It has a function of transmitting a transmission signal. The first level and the second level here are the first level and the second level when the handset 1 transmits a transmission signal in the fire alarm state, that is, the first level in the fire alarm state (= fire alarm level). ), A value different from the second level (> fire report level). When transmitting a transmission signal in the non-reporting state, both the first level and the second level are set to values smaller than the fire reporting level. For example, the first level in the non-reporting state is 0 (zero), and the second level in the non-reporting state is greater than 0 (zero) and smaller than the fire reporting level (0 = first). Level <second level <fire report level).

  Therefore, even if all the slave units 1 are in the non-reporting state, any of the slave units 1 increases or decreases the current value of the drawn current between the first level in the non-reporting state and the second level in the non-reporting state. It is possible to transmit a transmission signal. Thereby, as shown in FIG. 5, the electric current which flows through a pair of electric wires 51 and 52 will increase / decrease between two values. In the example of FIG. 5, during the period from time t1 to t2, one of the slave units 1 transmits a transmission signal, and the current value of the current flowing through the pair of electric wires 51 and 52 is between “I0” and “I1”. Increase or decrease.

  Next, in any of the slave units 1, when the read sensor value satisfies the predetermined determination condition and the determination of the fire alarm state is confirmed (S2: Yes), the control unit 162 increases the current value of the pull-in current. Adjust to the fire report level (S3). Therefore, when the determination result in any of the slave units 1 shifts from the non-reporting state to the fire reporting state, the current value of the current flowing through the pair of electric wires 51 and 52 is changed from “I0” to “I2” as shown in FIG. To increase. In the example of FIG. 5, any of the handset 1 is in the fire report state during the period from time t3 to time t6.

  Further, in the fire alarm state, the slave unit 1 increases or decreases the current value of the drawn current between two values of the first level in the fire alarm state and the second level in the fire alarm state, thereby transmitting data from the transmission circuit 14. It has the function to transmit the transmission signal showing. Therefore, when the subunit | mobile_unit 1 transmits a transmission signal in a fire report state (S4), as shown in FIG. 5, the electric current which flows through a pair of electric wires 51 and 52 will increase / decrease between two values. In the example of FIG. 5, during the period from time t4 to t5, one of the slave units 1 transmits a transmission signal, and the current value of the current flowing through the pair of electric wires 51 and 52 is between “I2” and “I3”. Increase or decrease.

  Thereafter, in the slave unit 1, the determination unit 161 periodically reads the sensor value at a predetermined sampling period (S5), and determines whether or not it is in the interlocking report state (S6). If it is not in the interlocking report state (S6: No), the subunit | mobile_unit 1 repeatedly reads the sensor value in the judgment part 161. FIG.

  Here, in any of the slave units 1, when the read sensor value satisfies a predetermined determination condition and the determination of the interlocking report state is confirmed (S5: Yes), the control unit 162 increases the current value of the pull-in current. To adjust the linked report level (S7). Therefore, in any of the slave units 1, the judgment result shifts from the fire report state to the linked report state. As shown in FIG. 5, the current value of the current flowing through the pair of electric wires 51 and 52 increases from “I3” to “I4”. To do. In the example of FIG. 5, any slave unit 1 is in the interlocking report state during the period after time t6.

  In the present embodiment, as an example, the fire report level is assumed to be 20 mA to 25 mA, the interlocking report level is assumed to be about 40 mA to 45 mA, and the difference between the first level and the second level when transmitting the transmission signal is 13 mA to 18 mA. It is assumed that the degree. As another example, the fire report level is assumed to be 5 mA to 8 mA, the linked report level is assumed to be about 15 mA to 20 mA, and the difference between the first level and the second level when transmitting the transmission signal is about 5 mA to 13 mA. It may be assumed.

  Further, the difference between the first level and the second level when transmitting the transmission signal is not limited to the same value in the non-reporting state and the fire reporting state, and the timing of transmitting the transmission signal is in the non-reporting state. It may be different depending on the state of the fire report. For example, in the non-reporting state, the difference between the first level and the second level when transmitting the transmission signal may be assumed to be about 2 mA to 4 mA.

  However, these specific numerical values are not intended to limit the embodiment, and can be appropriately changed. That is, in the present embodiment, the current value of the drawn current is allowed to vary within a predetermined allowable range. If it is in each tolerance in base unit 2, it can distinguish whether the operation state of sub unit 1 at that time is a fire report state or a linked report state.

<Effect>
According to the handset 1 of the automatic fire alarm system 100 of the present embodiment described above, the fire current is adjusted by adjusting the current value of the drawing current drawn from the pair of electric wires 51 and 52 according to the determination result of the determination unit 161. Information and linked information can be generated. That is, the slave unit 1 can distinguish between the fire report and the linked report by switching the magnitude (current value) of the current drawn (flowed in) from the pair of electric wires 51 and 52 between the fire report level and the linked report level. The correct current signal.

  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.

  Moreover, it is preferable that an interlocking | reporting information level is a larger electric current value than a fire information level like this embodiment. According to this configuration, the slave unit 1 first increases the current value of the drawn current when it enters the fire report state and adjusts it to the fire report level, and further increases the current value of the drawn current when it enters the linked report state. Can be adjusted to level. In other words, the slave unit 1 can perform the fire report and the linked report by gradually increasing the current value of the current drawn in accordance with the transition from the non-reporting status to the fire reported status and further to the linked report status. .

  Further, the fire report level is a current value larger than the current value of the standby current flowing through the pair of electric wires 51 and 52 in a state where neither the fire report nor the interlocking report is generated as in this embodiment. Is preferred. According to this structure, the main | base station 2 can distinguish the standby current for the disconnection detection of a pair of electric wires 51 and 52, and the electric current signal which the subunit | mobile_unit 1 generate | occur | produces at the time of fire report and interlocking | reporting report generation | occurrence | production. Therefore, for example, when one of the slave units 1 generates a fire report in a state where the pair of electric wires 51 and 52 is disconnected, the master unit 2 reliably distinguishes the fire report from the slave unit 1 from the standby current. can do.

  Further, the control unit 162 is configured to transmit a transmission signal representing transmission data by increasing or decreasing the current value of the drawn current between the first level and the second level as in the present embodiment. Preferably it is. 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 first level is preferably the same value as the fire alarm level, and the second level is preferably larger than the fire alarm level and smaller than the interlocking alarm level. The first level and the second level here are the first level and the second level in the fire report state as described above. According to this configuration, since the slave unit 1 increases or decreases the current value of the drawn current based on the fire report level when transmitting the transmission signal, it is possible to transmit the transmission signal in the fire report state. 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.

  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 a voltage between the pair of electric wires 51 and 52. Therefore, according to the automatic fire notification system 100, there is an advantage in that the interlocking function with the other device 3 can be added with the simple configuration as much as possible while being the 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. 6, 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 base unit 2 can reliably distinguish the transmission signal from the handset 1 and 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 subunit | mobile_unit 1 of the automatic fire alarm system 100 which concerns on this embodiment is implemented by the point in which the transmission circuit 14 has the short circuit 148 which electrically short-circuits between a pair of electric wires 51 and 52, as shown in FIG. It differs from the subunit | mobile_unit 1 of the automatic fire alarm system 100 of the form 1. 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 short circuit 148 is provided in place of the second lead-in part 142 in the example of FIG. As illustrated in FIG. 3, the short circuit 148 includes a thyristor 149 electrically connected between a pair of output terminals of the diode bridge 11. The gate of the thyristor 149 is electrically connected to the control unit 162.

  Thereby, the transmission circuit 14 draws current in the first drawing unit 141 when the semiconductor element 143 is turned on by the control unit 162, and current in the short circuit 148 when the thyristor 149 is turned on by the control unit 162. Pull in. Therefore, the transmission circuit 14 can change the current value of the drawn current when the current is drawn only by the first drawing unit 141 and when the current is drawn by the short circuit 148.

  In the present embodiment, the control unit 162 is configured to set the drawing current to the short-circuit current by operating the short-circuit 148 when either one of the fire report and the interlock report is generated. Here, it is assumed that the control unit 162 operates the first pull-in unit 141 when a fire report occurs and operates the short circuit 148 when a linked report occurs. In short, when the interlocking report is generated, the control unit 162 operates the short circuit 148 to flow a short circuit current between the pair of electric wires 51 and 52, thereby adjusting the current value of the drawn current to the interlocking report level. Here, when the short circuit 148 short-circuits between the pair of electric wires 51 and 52, the current flowing through the pair of electric wires 51 and 52 is limited by the resistance 22 of the parent device 2.

  According to the slave unit 1 of the automatic fire alarm system 100 described above, the current value of the lead-in current can be adjusted relatively easily (short circuit 148) when either the fire alarm or the interlock alarm occurs. Can be realized. Therefore, there is an advantage that the cost of the slave unit 1 is reduced. In the present embodiment, the control unit 162 exemplifies the case where the short circuit 148 is activated when the interlocking report is generated. However, the present invention is not limited to this example, and the short circuit 148 may be activated when the fire report occurs. .

  Other configurations and functions are the same as those of the first embodiment. Note that the configuration described in the present embodiment can be applied in combination with the configuration described in the second embodiment.

DESCRIPTION OF SYMBOLS 1 Slave unit 14 Transmission circuit 148 Short circuit 161 Judgment part 162 Control part 2 Master unit 3 Other apparatus 51,52 Electric wire 100 Automatic fire alarm system

Claims (8)

A transmission circuit that is electrically connected to a pair of electric wires to which a voltage is applied and draws current from the pair of electric wires as an incoming current;
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 current value of the drawing current;
The controller is
When the judgment result of the judgment unit is in the fire report state, the current value of the drawn current is adjusted to a predetermined fire report level to generate a fire report,
When the determination result of the determination unit is in the interlocking report state, the current value of the current drawn 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 slave unit of the automatic fire alarm system according to claim 1, wherein the interlocking alarm level is a current value larger than the fire alarm level. The fire report level is a current value larger than a current value of a standby current flowing through the pair of electric wires in a state where neither the fire report nor the interlocking report is generated. A slave unit of the automatic fire alarm system described in 1. The controller is
The transmission signal representing transmission data is transmitted by increasing or decreasing the current value of the drawing current between the first level and the second level. A slave unit of the automatic fire alarm system according to claim 1. The first level is equivalent to the fire alarm level,
The slave of the automatic fire alarm system according to claim 4, wherein the second level is larger than the fire alarm level and smaller than the linked alarm level. The operation period of the control unit is divided into a transmission period and a notification period,
The controller is
Performing transmission of the transmission signal during the transmission period;
The slave unit of the automatic fire alarm system according to claim 4 or 5, wherein the fire alarm or the linked alarm is generated during the alarm period. The transmission circuit has a short circuit that electrically shorts the pair of electric wires,
The control unit is configured to make the current drawn into a short-circuit current by operating the short-circuit when one of the fire report and the interlocking report occurs. The subunit | mobile_unit of the automatic fire alarm system of any one of claim | item 1 -6. The handset according to any one of claims 1 to 7,
An automatic fire alarm system comprising: a master unit that applies a voltage between the pair of electric wires.

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