JP2017084180A - Automatic fire alarm system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic fire alarm system that makes possible enhancement of workability.SOLUTION: An automatic fire alarm system 1 is equipped with a master machine 2, a slave machine 3 and a transmitter 4. The master machine 2 applies a voltage between paired electro-conductive paths 61 and 62. The slave machine 3, electrically connected between the paired electro-conductive paths 61 and 62, causes fire alarm, represented by voltage variation between the paired electro-conductive paths 61 and 62, to be generated. The transmitter 4 has an operation unit 43 that accepts operational inputs, is electrically connected between the paired electro-conductive paths 61 and 62 and, when the operation unit 43 has accepted an operational input, causes fire alarm to be generated. Also, the transmitter is electrically connected to the terminal ends of the paired electro-conductive paths 61 and 62, and further has a memory unit 47 that stores terminal end identification information associated with data whose connected position represents terminal ends of the paired electro-conductive paths 61 and 62.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic fire alarm system.

  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 conductive paths, 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.

  Also, in the P-type automatic fire alarm system, when a specific address (maximum address) is set for the fire detector (slave unit) connected to the end of the conductive path, and a signal from this slave unit cannot be received, There is a system for discriminating that a conductive path is disconnected (for example, see Patent Document 1).

JP 2013-206137 A

  In the configuration described in Patent Document 1, when a specific address is not set in the slave unit connected to the end of the conductive path due to a construction mistake of the contractor, it is necessary to set a specific address in the slave unit. . In general, since the handset is installed at a high place such as a ceiling, it is difficult to set an address after the handset is installed, and the workability of the automatic fire alarm system is lowered.

  This invention is made | formed in view of the said reason, The objective is to provide the automatic fire alerting | reporting system which enables improvement of workability.

  The automatic fire alarm system according to the present invention includes a master unit that applies a voltage between a pair of conductive paths, a fire that is electrically connected between the pair of conductive paths, and is represented by a voltage change between the pair of conductive paths. A slave unit that generates a report and an operation unit that receives an operation input, and is electrically connected between the pair of conductive paths, and transmits the fire report when the operation unit receives the operation input. The transmitter is electrically connected to the ends of the pair of conductive paths, and the connection position is identification information associated with data representing the ends of the pair of conductive paths. It further has a storage unit for storing information.

  The automatic fire notification system of the present invention has an effect of making it possible to improve workability.

It is a block diagram showing a schematic structure of an automatic fire information system concerning an embodiment. It is a block diagram which shows the whole structure of the automatic fire alerting | reporting system which concerns on embodiment. It is a wave form diagram showing change of drawing current of an automatic fire information system concerning an embodiment. It is explanatory drawing of operation | movement of the automatic fire alarm system which concerns on embodiment. It is a block diagram which shows the whole structure of the modification of the automatic fire alerting | reporting system which concerns on embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 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.

(Embodiment)
FIG. 1 is a block diagram showing a schematic configuration of an automatic fire alarm system 1 according to the present embodiment.

  The automatic fire alarm system 1 according to the present embodiment includes a master unit 2, a slave unit 3, and a transmitter 4. The base unit 2 applies a voltage between the pair of conductive paths 61 and 62. The subunit | mobile_unit 3 is electrically connected between a pair of conductive paths 61 and 62, and generates the fire report represented by the voltage change between a pair of conductive paths 61 and 62. FIG. The transmitter 4 has an operation unit 43 that receives an operation input, is electrically connected between the pair of conductive paths 61 and 62, and generates a fire report when the operation unit 43 receives the operation input. Further, the transmitter 4 is electrically connected to the terminal ends of the pair of conductive paths 61 and 62, and the terminal position is identification information associated with data representing the terminal ends of the pair of conductive paths 61 and 62. A storage unit 47 for storing identification information is further included.

  The transmitter 4 of the present embodiment is electrically connected to the terminal ends of the pair of conductive paths 61 and 62, and terminal identification information associated with data representing the terminal end is assigned to the connection position. The transmitter 4 is installed at a position where a person can operate while standing on the floor. Therefore, even after the transmitter 4 is installed, identification information is assigned to the transmitter 4 or the identification information assigned to the transmitter 4 is assigned. Confirmation and the like become easy, and it becomes possible to improve the workability.

  Below, the automatic fire alarm system 1 which concerns on this embodiment is demonstrated in detail.

<Overall configuration>
In this embodiment, although the case where the automatic fire alarm system 1 is used for an apartment house (apartment) is illustrated, the automatic fire alarm system 1 is not limited to an apartment house, for example, a commercial facility, a hospital, a hotel, a miscellaneous building, etc. Applicable to various buildings.

  As shown in FIG. 2, the automatic fire notification system 1 according to the present embodiment includes one master unit 2, a plurality of slave units 301, 302, 303, and the transmitter 4. When each of the plurality of slave units 301, 302, 303... Is not particularly distinguished, it is simply referred to as “slave unit 3”. The plurality of slave units 3 and transmitters 4 are electrically connected between a pair of conductive paths 61 and 62 whose one ends are electrically connected to the master unit 2. Note that each of the pair of conductive paths 61 and 62 specifically includes a plurality of electric wires that electrically connect the plurality of slave units 3 and the transmitter 4 by a feed wiring. Further, in the example shown in FIG. 2, one set of two (two-wire) conductive paths 61 and 62 is one set, but a plurality of sets may be provided.

  The automatic fire notification system 1 basically detects the occurrence of a fire in a slave unit 3 including a heat detector, a smoke detector, a flame detector, and the like, and transfers from the slave unit 3 to a master unit 2 as a receiver. It is configured to notify the occurrence of a fire (fire report). Furthermore, the transmitter 4 has an operation unit 43 configured by, for example, a push button switch. When a person detects a fire, the operation unit 43 (push button switch) is manually operated to thereby transmit the transmitter. A fire report is made from 4 to the main unit 2.

  The automatic fire alarm system 1 of this embodiment is based on a P-type automatic fire alarm system. More specifically, in the present embodiment, the existing wiring (the pair of conductive paths 61 and 62) is used as it is in the apartment house where the P-type automatic fire alarm system has been installed, and the receiver (master unit). Assume that the slave and transmitter are replaced. Note that the automatic fire notification system 1 of the present embodiment can also be employed as a newly introduced automatic fire notification system.

  And the automatic fire alarm system 1 of this embodiment can communicate between the main | base station 2, the subunit | mobile_unit 3, and the transmitter 4 with the signal represented by the voltage change between a pair of conductive paths 61 and 62. FIG. It is configured. In the present embodiment, time-division communication is adopted as a communication method between the parent device 2 and the plurality of child devices 3 and the transmitter 4, and each child device 3 and the transmitter 4 are connected to the own device. A signal is transmitted to base unit 2 in the corresponding time slot (time zone). That is, the automatic fire alarm system 1 of the present embodiment is partly added with the same function as the R type although it is the P type.

<Example configuration of main unit>
The base unit 2 of the present embodiment is a P-type receiver that receives a fire occurrence notification (fire report) from the handset 3 and the transmitter 4. The base unit 2 is installed, for example, in a management room of a building (a collective housing).

  As shown in FIG. 1, the main 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, an operation unit 26 that receives operation inputs, And a processing unit 27 having a function of controlling each unit (reception unit 23, transmission unit 24, display unit 25).

  The application unit 21 constantly applies a predetermined voltage to the pair of conductive paths 61 and 62. Here, as an example, the voltage applied between the pair of conductive paths 61 and 62 by the applying unit 21 is 24V 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 conductive paths 61 and 62. In the example of FIG. 1, the resistor 22 is electrically connected between one of the pair of conductive paths 61 and 62 (the high potential side) conductive path 61 and the application unit 21. However, not limited to this example, the resistor 22 may be electrically connected between the other (low potential side) conductive path 61 and the application unit 21, or both of the pair of conductive paths 61 and 62. And the application unit 21 may be electrically connected to each other.

  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 conductive paths when the pair of conductive paths 61 and 62 are short-circuited. It has two functions, a second function for limiting the current flowing in the paths 61 and 62. 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 conductive paths 61 and 62.

  The receiving unit 23 receives the current signal from the slave unit 3 and the transmitter 4 as a voltage signal (voltage change) on the pair of conductive paths 61 and 62. That is, the current value of the current (drawn current) drawn from the pair of conductive paths 61 and 62 by the slave unit 3 and the transmitter 4 corresponds to the magnitude of the voltage drop at the resistor 22. Therefore, the receiving part 23 can receive the fire information represented by the current value of the drawing current of the slave unit 3 and the transmitter 4 as a voltage signal. When the master unit 2 receives the fire report, the display unit 25 displays the location where the fire has occurred.

  The transmission unit 24 transmits a current signal generated on the pair of conductive paths 61 and 62 to the slave unit 3 and the transmitter 4 by changing the current flowing from the pair of conductive paths 61 and 62. A change in current (current signal) flowing through the pair of conductive paths 61 and 62 generated by the transmission unit 24 is converted into a voltage signal by a voltage drop at the resistor 22. That is, the voltage change generated on the pair of conductive paths 61 and 62 when the transmitter 24 changes the current flowing from the pair of conductive paths 61 and 62 is received by the slave unit 3 and the transmitter 4 as a voltage signal. It will be. In the present embodiment, the transmission unit 24 transmits a synchronization signal and a request signal as current signals to the slave unit 3 and the transmitter 4. The request signal is a signal that requests a response from the slave unit 3 and the transmitter 4, and is, for example, a survival confirmation (keep alive) signal.

  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.

  In addition, the base unit 2 of this embodiment includes a disconnection detection unit 271 that detects disconnection of the pair of conductive paths 61 and 62. The disconnection detection unit 271 is configured integrally with the processing unit 27 and is a current signal from the transmitter 4 connected to the terminal ends (ends opposite to the base unit 2) of the pair of conductive paths 61 and 62. Based on the above, disconnection of the pair of conductive paths 61 and 62 is detected. When the receiving unit 23 receives the current signal from the transmitter 4, the disconnection detecting unit 271 determines that no disconnection has occurred in the pair of conductive paths 61 and 62, and the receiving unit 23 receives the voltage signal from the transmitter 4. Is not received, it is determined that a disconnection has occurred in the pair of conductive paths 61 and 62. The disconnection detection unit 271 may be configured separately from the processing unit 27.

  Moreover, the main | base station 2 uses the commercial power source, private power generation equipment, etc. which are not illustrated as a main power source. The master unit 2 includes the slave unit 3 and the transmitter 4 connected to the pair of conductive paths 61 and 62 by applying a voltage between the pair of conductive paths 61 and 62 from the application unit 21 as described above. The automatic fire alarm system 1 functions as a power source for the entire operation.

  Furthermore, the base unit 2 further includes a standby power source 28 using a storage battery so that a power source for operation of the automatic fire alarm system 1 can be secured even in the event of a power failure. The application unit 21 automatically switches the power supply source from the main power source to the standby power source 28 when the main power source is interrupted, and automatically switches from the standby power source 28 to the main power source when the main power source is restored. The standby power supply 28 has a capacity and other specifications determined so as to satisfy the standards defined by the ministerial ordinance.

<Example configuration of slave unit>
As shown in FIG. 1, the slave unit 3 of the present embodiment includes a diode bridge 31, a power supply circuit 32, a sensor 33, a transmission circuit 34, a reception circuit 35, a processing unit 36, a storage unit 37, And a determination unit 38. The subunit | mobile_unit 3 is electrically connected to the middle of a pair of electrically conductive path 61,62. The state of being electrically connected between the pair of conductive paths 61 and 62 is a state of being directly connected to two other devices (the main unit 2, the sub unit 3 and the oscillator 4) via electric wires, in other words. In other words, it is in a state where it is connected to other devices by the feed wiring.

  In the diode bridge 31, a pair of conductive paths 61 and 62 are electrically connected to the input end side, and the power supply circuit 32, the transmission circuit 34, and the reception circuit 35 are electrically connected to the output end side.

  The power supply circuit 32 generates power for operation of the slave unit 3 from the power supplied from the master unit 2 via the pair of conductive paths 61 and 62.

  The sensor 33 detects the occurrence of fire or smoke.

  The transmission circuit 34 is configured to transmit the current value of the current drawn from the pair of conductive paths 61 and 62 to the parent device 2 as a current signal. A change in current (current signal) flowing through the pair of conductive paths 61 and 62 generated by the transmission circuit 34 is converted into a voltage signal by a voltage drop at the resistor 22. That is, the transmitter circuit 34 adjusts the current value of the drawn current drawn from the pair of conductive paths 61 and 62, so that the base unit 2 receives the voltage signal corresponding to the drawn current value. The transmission circuit 34 of the present embodiment is configured such that the current value of the drawn current can be switched in three stages.

  The reception circuit 35 receives a current signal (synchronization signal, request signal) from the parent device 2 as a voltage change (voltage signal) generated between the pair of conductive paths 61 and 62. That is, a change in current (current signal) flowing through the pair of conductive paths 61 and 62 generated by the parent device 2 is converted into a voltage signal by a voltage drop at the resistor 22. Current signal (synchronization signal, request signal) is received as a voltage signal. In other words, the receiving circuit 35 receives, as a voltage signal, a voltage change that occurs between the pair of conductive paths 61 and 62 when the parent device 2 changes the current flowing from the pair of conductive paths 61 and 62. .

  The memory | storage part 37 has memorize | stored the address allocated to the subunit | mobile_unit 3 as identification information. Specifically, the handset 3 of the present embodiment includes a setting unit 39 that stores an address in the storage unit 37. The setting unit 39 is configured to be able to communicate with the address setting unit 5 by communication means such as wired communication via a removable cable or wireless communication. The address setting unit 5 receives an address assigned to the child device 3 by an operation input from the user, and transmits the input address to the setting unit 39. The setting unit 39 stores the address transmitted from the address setting unit 5 in the storage unit 37 as identification information. The user assigns a unique address to each of the plurality of slave units 3 so that the addresses do not overlap among the plurality of slave units 3. The addresses assigned to each of the plurality of slave units 3 are registered in the master unit 2 in association with the installation locations (for example, room numbers) of the plurality of slave units 3.

  Further, the storage unit 37 stores determination conditions for the determination unit 38 to determine the operation state of the child device 3. The determination condition is, for example, a threshold set for the output of the sensor 33 or the like. Note that the address (identification information) assigned to the child device 3 and the determination condition may be stored in the same storage unit 37, or a plurality of storage units 37 may be provided and stored in separate storage units 37, respectively. May be.

  The determination unit 38 determines whether the operation state of the slave unit 3 is a fire report state that generates a fire report or a non-report state (a normal state) that does not generate a fire report. Specifically, the determination unit 38 reads the output (sensor value) of the sensor 33 and determines the operation state by referring to the determination conditions stored in the storage unit 37. For example, the determination unit 38 determines that the fire report state is present when the read sensor value exceeds a threshold value.

  The processing unit 36 controls the transmission circuit 34 and the reception circuit 35 to cause the transmission circuit 34 to transmit a current signal, or cause the reception circuit 35 to receive a current signal (synchronization signal, request signal) from the parent device 2. To do. The processing unit 36 has a microcomputer (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 processing unit 36 causes the transmission circuit 34 to transmit a current signal by adjusting the current value of the drawn current according to the determination result of the determination unit 38. The change in the current value of the drawn current will be specifically described with reference to FIG. FIG. 3 shows a change in the current value of the current flowing through the pair of conductive paths 61 and 62 with the horizontal axis representing time and the vertical axis representing the current value. In the example of FIG. 3, the transmission circuit 34 switches the current value of the drawn current, so that the current value of the current flowing through the pair of conductive paths 61 and 62 is increased stepwise in three stages from I0 to I1, I2, and I3. It is possible (I0 <I1 <I2 <I3). Here, the current value “I0” is a current flowing through the pair of conductive paths 61 and 62 in the non-reporting state. The current value of the current flowing through the pair of conductive paths 61 and 62 is basically “I0” as shown in FIG.

  In the example of FIG. 3, it is a non-reporting state during the period from time t0 to t3. Further, during the period from time t1 to time t2, the transmission circuit 34 transmits a transmission signal representing transmission data (for example, an address assigned to the slave unit 3) as a current signal, and the pair of conductive paths 61 and 62 are connected. The current value of the flowing current increases or decreases between “I0” and “I1”.

  Moreover, in the example of FIG. 3, it is a fire report state in the period of the time t3-t6. When the determination result of the determination unit 38 is in a fire report state, as shown in FIG. 3, the current value of the current flowing through the pair of conductive paths 61 and 62 increases from “I0” to “I2”. In the period from time t4 to t5, the transmission circuit 34 transmits a transmission signal representing transmission data as a current signal, and the current value of the current flowing through the pair of conductive paths 61 and 62 is “I2” and [ It has increased or decreased with respect to “I3”.

  In this way, the processing unit 36 adjusts the current value of the drawn current to a predetermined fire reporting level when the determining unit 38 determines that the state is a fire reporting state. That is, the transmission unit 24 changes the current value of the drawn current from “I0” to “I2”, thereby generating a fire report. Further, the processing unit 36 sets the current value of the pull-in current between two values (between the current values “I0” and “I1” or the current value “I2” in both the fire report state and the non-report state). ”And“ I3 ”), the transmission signal is transmitted from the transmission circuit 34. When the slave unit 3 is in the fire report state, the master unit 2 transmits the transmission signal indicating the transmission data including the address (identification information) stored in the storage unit 37, so that the master unit 2 The slave unit 3 can be specified.

  In addition, the automatic fire alarm system 1 performs communication using a transmission signal between the master unit 2 and the slave unit 3 at the time of non-reporting (normal time), so that the communication status between the master unit 2 and the slave unit 3 An automatic test can be performed on the operation of the slave unit 3.

  The transmission circuit 34 may be configured by a step-down circuit that generates a fire report and transmits a transmission signal by stepping down the voltage between the pair of conductive paths 61 and 62.

<Configuration example of transmitter>
As shown in FIG. 1, the transmitter 4 of the present embodiment includes a diode bridge 41, a power supply circuit 42, an operation unit 43, a transmission circuit 44 (transmission unit), a reception circuit 45, a processing unit 46, A storage unit 47 and a response circuit 48 are provided. The transmitter 4 is electrically connected to the terminal ends of the pair of conductive paths 61 and 62. The terminal ends of the pair of conductive paths 61 and 62 are ends (the other end) opposite to the base unit 2 in the pair of conductive paths 61 and 62 whose one ends are electrically connected to the base unit 2, that is, a high potential. The downstream end of the current flowing through the conductive path 61 on the side, and the upstream end of the current flowing through the conductive path 62 on the low potential side. In other words, the terminal ends of the pair of conductive paths 61 and 62 are connection positions where only one device (slave unit 3) is directly connected by an electric wire, that is, between the base unit 2 in the pair of conductive paths 61 and 62. The connection position where all other devices (slave devices 3) are electrically connected.

  In the diode bridge 41, a pair of conductive paths 61 and 62 are electrically connected to the input end side, and a power supply circuit 42, a transmission circuit 44, and a reception circuit 45 are electrically connected to the output end side.

  The power supply circuit 42 generates power for operating the transmitter 4 from the power on the pair of conductive paths 61 and 62.

  The operation unit 43 is configured by, for example, a push button switch, and is configured to accept an operation input from a person.

  The transmission circuit 44 is configured to transmit the current value of the current drawn from the pair of conductive paths 61 and 62 to the parent device 2 as a current signal. A change in current (current signal) flowing through the pair of conductive paths 61 and 62 generated by the transmission circuit 44 is converted into a voltage signal by a voltage drop at the resistor 22. That is, the transmitter circuit 44 adjusts the current value of the drawn current drawn from the pair of conductive paths 61 and 62, so that a voltage signal corresponding to the drawn current value is received by the parent device 2. The transmission circuit 44 of the present embodiment is configured such that the current value of the drawn current can be switched in three stages.

  The reception circuit 45 receives a current signal (synchronization signal, request signal) from the parent device 2 as a voltage signal on the pair of conductive paths 61 and 62. That is, a change in current (current signal) flowing through the pair of conductive paths 61 and 62 generated by the parent device 2 is converted into a voltage signal by a voltage drop at the resistor 22. Current signal (synchronization signal, request signal) is received as a voltage signal. In other words, the receiving circuit 45 receives, as a voltage signal, a voltage change that occurs on the pair of conductive paths 61 and 62 when the base unit 2 changes the current flowing from the pair of conductive paths 61 and 62. .

  The storage unit 47 stores an address assigned to the transmitter 4 as identification information. Specifically, the transmitter 4 according to the present embodiment includes a setting unit 49 that stores an address in the storage unit 47. The setting unit 49 is configured to be able to communicate with the address setting unit 5 by communication means such as wired communication via a detachable cable or wireless communication. The address setting unit 5 receives an address assigned to the transmitter 4 by an operation input from the user, and transmits the input address to the setting unit 49. The setting unit 49 stores the address transmitted from the address setting unit 5 in the storage unit 47 as identification information. The address assigned to the transmitter 4 is registered in the parent device 2 in association with the installation location of the transmitter 4.

  Here, in the automatic fire alarm system 1 of the present embodiment, addresses that can be assigned to the slave unit 3 and the transmitter 4 are classified into an intermediate address (intermediate identification information) and a termination address (termination identification information). The intermediate address is an address assigned to a device connected in the middle of the pair of conductive paths 61 and 62. The termination address is an address assigned to a device connected to the end of the pair of conductive paths 61 and 62, and is associated with data indicating that the connection position is the end of the pair of conductive paths 61 and 62. That is, the device to which the end address is assigned is connected to the end of the pair of conductive paths 61 and 62. In the present embodiment, each of the plurality of slave units 3 is connected to the middle of the pair of conductive paths 61 and 62, and therefore a unique intermediate address is assigned to each of the plurality of slave units 3. Further, since the transmitter 4 is connected to the terminal ends of the pair of conductive paths 61 and 62, a terminal address is assigned to the transmitter 4. As an example, intermediate addresses “1”, “2”, “3”... Are assigned to a plurality of slave units 301, 302, 303... And a termination address “64” is assigned to the transmitter 4. Suppose that In the case where the intermediate address and the end address are not distinguished, they are simply referred to as “address”.

  The processing unit 46 controls the transmission circuit 44 and the reception circuit 45 to transmit a current signal from the transmission circuit 44 or to receive a current signal (synchronization signal, request signal) from the parent device 2 by the reception circuit 45. To do. The processing unit 46 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 processing unit 46 causes the transmission circuit 44 to transmit a current signal by adjusting the current value of the drawn current when the operation unit 43 receives an operation input. The change in the current value of the drawn current by the transmission circuit 44 is the same as the change in the current value of the drawn current by the transmission circuit 34 of the slave unit 3 described with reference to FIG. .

  When the operation unit 43 does not accept an operation input, the processing unit 46 is in a non-reporting state, maintains the current value of the drawn current at “I0”, and transmits a transmission signal to the current value of the drawn current. Increase or decrease between “I0” and “I1”. Further, when the operation unit 43 receives an operation input, the processing unit 46 enters a fire alarm state, increases the current value of the current drawn from “I0” to “I2”, and transmits a current signal. Is increased or decreased between “I2” and “I3”.

  As described above, when the operation unit 43 receives an operation input, the processing unit 46 increases the current value of the drawn current, so that the fire report is transmitted from the transmitter 4 to the parent device 2. That is, the transmission circuit 44 generates a fire report by changing the current value of the drawn current from the base current I0 to a predetermined fire report level I2. The transmission circuit 44 transmits a transmission signal by increasing or decreasing the current value of the drawn current between the first level and the second level in both the fire report state and the non-report state. To do. When the transmitter 4 is in a fire report state, the transmitter 2 transmits a transmission signal indicating transmission data including the address (identification information) stored in the storage unit 47, so that the master unit 2 generates a fire report. It becomes possible to specify that the report source is the transmitter 4.

  In addition, the automatic fire alarm system 1 performs communication using a transmission signal between the master unit 2 and the transmitter 4 at the time of non-reporting (normal time), so that the communication status between the master unit 2 and the transmitter 4 An automatic test can be performed on the operation of the transmitter 4.

  The transmission circuit 44 may be constituted by a step-down circuit that generates a fire report and transmits a transmission signal by stepping down the voltage between the pair of conductive paths 61 and 62.

  The response circuit 48 is electrically connected to the parent device 2 via a response line (not shown). When the base unit 2 receives the fire report from the oscillator 4, the base unit 2 transmits a response confirmation signal via the response line. When the response circuit 48 receives the response confirmation signal from the parent device 2, the response circuit 48 turns on the response lamp.

<Operation>
Hereinafter, operation | movement of the automatic fire alarm system 1 which concerns on this embodiment is demonstrated using FIG. In FIG. 4, Ta is a section (synchronization section) in which a synchronization signal is transmitted, Tb is a section (request section) in which a request signal is transmitted, and Tc is a guard section. In FIG. 4, Td is a section (transmission section) in which a transmission signal is transmitted, Te is a stabilization waiting period, and Tf is a section (reporting section) for issuing a fire report.

  In the automatic fire alarm system 1 of the present embodiment, the communication method between the master unit 2 and the plurality of slave units 3 and the transmitter 4 employs a time division method. Base unit 2 periodically transmits a synchronization signal, and in synchronization with this synchronization signal, the start timing of request period Tb, transmission period Td, reporting period Tf, etc. following synchronization period Ta is determined. Each slave unit 3 and transmitter 4 receive the synchronization signal in the synchronization section Ta, and the timing at which the own unit transmits the current signal is determined in synchronization with the synchronization signal.

  In the request section Tb, the parent device 2 transmits a request signal to each child device 3 and the transmitter 4. Each slave unit 3 and transmitter 4 transmit a transmission signal representing transmission data (for example, an address assigned to the own unit) in the transmission section Td. Specifically, the transmission section Td is time-divided in the order of time slots Td1 to Td64. The time slots Td1 to Td63 are associated with the intermediate addresses “1” to “63” on a one-to-one basis. The time slot Td64 is associated with the end address “64”.

  In the transmission section Td, each slave unit 3 transmits a transmission signal in a time slot corresponding to the address stored in the storage unit 37, and the transmitter 4 transmits the time corresponding to the address stored in the storage unit 47. A transmission signal is transmitted in the slot. Therefore, in the transmission section Td, the slave unit 301 to which the intermediate address “1” is assigned in the time slot Td1 transmits a transmission signal representing transmission data including the address stored in the storage unit 37. In the next time slot Td2, the slave unit 302 to which the intermediate address “2” is assigned transmits a transmission signal representing transmission data including the address stored in the storage unit 37. In the time slots Td3 to Td63, the slave unit 3 to which the corresponding intermediate address is assigned sequentially transmits the transmission signal. In the time slot Td64, the transmitter 4 to which the termination address “64” is assigned transmits a transmission signal representing transmission data including the address stored in the storage unit 47. In the transmission section Td, the slave unit 3 and the transmitter 4 are in a standby state in a time zone other than the time slot corresponding to the own unit.

  Further, in the transmission section Td, the disconnection detection unit 271 of the base unit 2 transmits a transmission signal representing the termination address “64” associated with the data representing that the connection position is the termination of the pair of conductive paths 61 and 62. It is detected whether the receiving unit 23 has received it. Then, the disconnection detection unit 271 determines whether or not a disconnection has occurred in the pair of conductive paths 61 and 62 based on the detection result of the transmission signal representing the termination address “64”. Specifically, in the transmission section Td, when the reception unit 23 receives a transmission signal representing the termination address “64”, the transmission signal from the transmitter 4 connected to the termination of the pair of conductive paths 61 and 62 is normal. Has been communicated to. Therefore, the disconnection detection unit 271 determines that no disconnection has occurred in the pair of conductive paths 61 and 62 when the reception unit 23 receives the transmission signal representing the termination address “64”. In the transmission section Td, when the receiving unit 23 does not receive a transmission signal representing the termination address “64”, the transmission signal from the transmitter 4 connected to the termination of the pair of conductive paths 61 and 62 is the master unit. 2 is not transmitted normally. Therefore, the disconnection detection unit 271 determines that a disconnection has occurred in the pair of conductive paths 61 and 62 when the reception unit 23 does not receive the transmission signal representing the termination address “64”. In this case, the display unit 25 displays that a break has occurred in the pair of conductive paths 61 and 62.

  Next, in the notification section Tf, each handset 3 performs a fire detection operation, and generates a fire report when the determination unit 38 determines that the fire report state is present. In the notification section Tf, the transmitter 4 generates a fire report when the operation unit 43 receives an operation input. Specifically, the reporting period Tf is time-divided in the order of time slots Tf1 to Tf64. The time slots Tf1 to Tf63 are associated with the intermediate addresses “1” to “63” on a one-to-one basis. The time slot Tf64 is associated with the end address “64” (end identification information).

  Each cordless handset 3 performs a fire detection operation in a time slot corresponding to the address stored in the storage unit 37. Therefore, the slave unit 301 assigned the intermediate address “1” in the time slot Tf1 performs the fire detection operation in the notification period Tf. Specifically, in the time slot Tf1, the slave unit 301 reads the output (sensor value) of the sensor 33 by the determination unit 38 and determines whether it is a fire report state or a non-reporting state. And the subunit | mobile_unit 301 maintains the electric current value of drawing current in "I0", when the judgment result of the judgment part 38 is a non-reporting state. Further, when the determination result of the determination unit 38 is the fire report state, the slave unit 301 increases the current value of the drawn current from “I0” to “I2” and generates a fire report. At this time, the slave unit 301 increases or decreases the current value of the drawn current between “I2” and “I3” and transmits a transmission signal indicating the intermediate address “1”, so that the fire report source is generated. The master unit 2 is notified that it is the slave unit 301. Note that the determination process of the determination unit 38 reading the sensor value to determine whether the state is the fire report state or the non-report state may be performed in advance before the time slot Tf1. In time slots Tf <b> 2 to Tf <b> 63, the handset 3 to which the corresponding address is assigned sequentially performs the fire detection operation.

  In the time slot Tf64, the transmitter 4 to which the termination address “64” is assigned maintains the current value of the drawn current at “I0” when the operation unit 43 does not accept the operation input. In addition, when the operation unit 43 receives an operation input, the transmitter 4 increases the current value of the drawn current from “I0” to “I2” and generates a fire report. At this time, the transmitter 4 increases or decreases the current value of the drawn current between “I2” and “I3” and transmits a transmission signal indicating the termination address “64”, so that the source of the fire report is issued. The base unit 2 is notified that it is the transmitter 4. The transmitter 4 generates a fire report in the time slot Tf64 even when the operation unit 43 receives an operation input before the time slot Tf64.

  In the notification section Tf, the slave unit 3 and the transmitter 4 are in a standby state in a time zone other than the time slot corresponding to the own unit.

<Effect>
In the automatic fire alarm system 1 of the present embodiment, the transmitter 4 is connected to the ends of the pair of conductive paths 61 and 62. The transmitter 4 is assigned a termination address “64” (termination identification information) associated with data indicating that the connection position is the termination of the pair of conductive paths 61 and 62, and this termination address “64”. A transmission signal representing transmission data including "is transmitted to the base unit 2. Thereby, the main | base station 2 judges that the disconnection has not arisen in a pair of conductive paths 61 and 62 by receiving the transmission signal from the transmitter 4 connected to the terminal of a pair of conductive paths 61 and 62. It becomes possible to do. That is, the transmitter 4 of this embodiment also has a function as an address terminator that is connected to the terminal ends of the pair of conductive paths 61 and 62 and notifies the terminal address. Further, since the transmitter 4 is installed at a position where the operation unit 43 can be operated while a person is standing on the floor, the setting work for assigning an address to the transmitter 4 is facilitated. Therefore, when the user forgets to set the terminal address “64” in the transmitter 4, the setting work for assigning the address can be easily performed even after the transmitter 4 is installed. It is possible to improve the performance. Further, since the transmitter 4 also functions as an address terminator, it is not necessary to separately provide an address terminator, a termination resistor, or the like at the ends of the pair of conductive paths 61 and 62.

  In addition, in the example of the automatic fire alarm system 1 described above, the transmitter 4 is configured to include one pair of conductive paths 61 and 62 connected to the end, but a plurality of pairs of conductive paths 61 and 62 are included. It may be. In this case, a configuration in which the pair of conductive paths 61 and 62 having the transmitter 4 connected to the terminal end and the pair of conductive paths 61 and 62 having the address terminal unit connected to the terminal end may be mixed.

  In addition, the transmitter 4 increases or decreases the voltage between the pair of conductive paths 61 and 62 with reference to the fire alarm level in a state where the voltage is changed to a predetermined fire alarm level, thereby generating the fire alarm and identifying the end of the fire alarm. It further includes a transmission circuit 44 (transmission unit) that performs transmission of transmission signals representing information. With the above configuration, the transmitter 4 can transmit a transmission signal even in a fire report state, and can notify the master unit 2 of the source of the fire report.

  In addition, when the operation unit 43 receives an operation input, the transmitter 4 generates a fire report even if the slave unit 3 has already generated a fire report, and sets the address of its own device to the master unit 2. Configured to notify. Since the transmitter 4 generates a fire report when a person inputs an operation to the operation unit 43, the master unit 2 may detect that there is a person around the transmitter 4 from which the fire report is generated. It is possible to notify the presence of a person on the display unit 25.

  In this embodiment, the end address (end end identification information) is specified as the address “64”. However, the present invention is not limited to this and may be another address (value). The base unit 2 may have a configuration in which the processing unit 27 has a function of designating an arbitrary address as a termination address (termination identification information). Thereby, for example, even if the transmitter stored in advance in the storage unit cannot rewrite the address, the address stored in the storage unit of the transmitter can be designated as the termination address. Therefore, the automatic fire alarm system 1 can be configured by electrically connecting the transmitter to the terminal ends of the pair of conductive paths 61 and 62.

  Further, the transmitter 4 of the present embodiment includes a setting unit 49 that stores identification information different from the terminal identification information in the storage unit 47. That is, the setting unit 49 causes the storage unit 47 to store an arbitrary address input by the user to the address setting unit 5. Therefore, it becomes possible to assign an intermediate address to the transmitter 4 and electrically connect it to the middle of the pair of conductive paths 61 and 62. Accordingly, a plurality of transmitters 4 including the transmitter 4 connected to the terminal ends of the pair of conductive paths 61 and 62 can be connected to the pair of conductive paths 61 and 62. In the modification shown in FIG. 5, two transmitters 4 (transmitters 401 and 402) are electrically connected to the pair of conductive paths 61 and 62. The transmitter 401 connected to the middle of the pair of conductive paths 61 and 62 is assigned an intermediate address, and the transmitter 402 connected to the terminal of the pair of conductive paths 61 and 62 is assigned a termination address.

  Moreover, the automatic fire alarm system 1 of this embodiment has the address confirmation mode of the transmitter 4 as an operation mode. In this address confirmation mode, when the operation unit 43 receives an operation input, the transmitter 4 notifies the parent device 2 of the address assigned to the own device without generating a fire report. For example, as shown in FIG. 5, when a plurality of transmitters 4 are connected to a pair of conductive paths 61 and 62, the user sets the operation mode of the automatic fire alarm system 1 to the address confirmation mode, and The operation input to the operation unit 43 is sequentially performed on the transmitter 4 of the table. The base unit 2 displays on the display unit 25 the address assigned to the transmitter 4 for which the operation unit 43 has accepted the operation input. Since the transmitter 4 is installed at a position where a person can operate the operation unit 43 while standing on the floor, even when there are a plurality of transmitters 4, the transmitter 4 is connected to the terminal ends of the pair of conductive paths 61 and 62. The transmitter 4 that is present can be easily identified.

DESCRIPTION OF SYMBOLS 1 Automatic fire alarm system 2 Master unit 3 Slave unit 4 Transmitter 43 Operation part 44 Transmission circuit (transmission part)
47 Storage unit 49 Setting unit 61, 62 Conductive path

Claims (3)

A master unit that applies a voltage between a pair of conductive paths;
A handset that is electrically connected between the pair of conductive paths and generates a fire report represented by a voltage change between the pair of conductive paths;
An operation unit that receives an operation input, and is electrically connected between the pair of conductive paths, and includes a transmitter that generates the fire report when the operation unit receives the operation input.
The transmitter is electrically connected to the terminal ends of the pair of conductive paths, and stores a terminal identification information that is identification information associated with data representing a terminal position of the pair of conductive paths. An automatic fire alarm system characterized by further comprising a section. The transmitter is configured to increase or decrease the voltage between the pair of conductive paths to a predetermined fire alarm level with reference to the fire alarm level, thereby generating the fire alarm and the terminal identification information. The automatic fire notification system according to claim 1, further comprising: a transmission unit configured to transmit a transmission signal representing The automatic fire notification system according to claim 1, wherein the transmitter further includes a setting unit that stores identification information different from the terminal identification information in the storage unit.

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