JP6722805B2 - Smoke detector - Google Patents

Description

The present invention relates to a tunnel disaster prevention system for monitoring a fire by connecting a fire detector installed in a tunnel to a disaster prevention monitor board.

2. Description of the Related Art Conventionally, an emergency facility is installed in a tunnel such as a road for automobiles in order to protect people and vehicles from a fire accident that occurs in the tunnel.

As such an emergency facility, a fire detector, a manual notification device, and an emergency telephone are installed to monitor and report a fire, and a fire hydrant device is installed to extinguish the fire and prevent the spread of fire. In order to protect from fire, water spray equipment that sprays fire extinguishing water from the water spray head to lower the temperature inside the tunnel is installed, and by installing a disaster prevention reception board that monitors and controls the terminal equipment of these emergency facilities, We are building a tunnel disaster prevention system.

Tunnel disaster prevention systems consisting of disaster prevention receivers and terminal devices are roughly divided into R type transmission systems and P type direct transmission systems. The R-type transmission method enables individual control by connecting a fire detector with an address set to the signal line and performing transmission control to detect each fire detector.

In the P-type direct delivery system, the fire detector is divided into predetermined automatic notification section units, and a plurality of fire detectors belonging to the same section are connected to the signal line drawn from the disaster prevention reception panel for each section for monitoring. When a fire detector detects a fire, it outputs a fire pulse signal at a predetermined time interval, and therefore the first pulse is processed as a fire warning signal. Subsequently, the disaster prevention receiver panel once recovers the fire reception circuit when a predetermined time has elapsed from the reception of the first pulse, and if a fire pulse signal is received again from the fire detector within a predetermined time after the recovery, it is judged as a fire. If a fire pulse signal is not received again within a predetermined time after the recovery, on the other hand, it is treated as non-fire.

JP-A-2002-246962 JP, 11-128381, A JP, 2006-99394, A

However, in such a conventional P-type direct-dispatch tunnel disaster prevention system, the fire detectors are monitored in units of automatic notification sections. There is a problem that a hardware configuration such as a receiving circuit corresponding to the number is required, the housing size of the disaster prevention receiving panel becomes large, and the cost also increases.

For example, in the case of a tunnel of 2400 meters, if the monitoring area of the fire detector is within 25 meters on both sides, 96 fire detectors are required, and the automatic notification section is set to include two fire detectors each. As a result, there are 48 sections, and correspondingly, the receiving circuit of the disaster prevention reception board requires 48 inputs, which increases the size of the case of the disaster prevention reception board and increases the cost.

In addition, the signal line between the disaster prevention reception board and the fire detector is wired according to the number of automatic notification sections, and the amount of wiring installed between the disaster prevention reception board and the fire detector increases according to the number of sections. However, there is a problem that the equipment construction is difficult and the equipment cost is high.

It is an object of the present invention to provide a tunnel disaster prevention system that enables cost reduction without increasing the housing size and wiring amount of a disaster prevention reception board even if the number of automatic notification sections increases.

(Tunnel disaster prevention system)
The present invention provides a tunnel disaster prevention system in which a plurality of fire detectors are arranged in a tunnel to monitor a fire with a disaster prevention reception panel.
Divide the multiple fire detectors installed in the tunnel into groups of a predetermined number of fire detectors including multiple sections, connect each group to the disaster prevention reception board via the signal line,
The disaster prevention reception board sets a unique address for a predetermined number of fire detectors connected to the signal line by performing a detector test that causes the fire detector to perform a predetermined test operation for each signal line, When a fire detection signal containing the address set by the detector test is received from the fire detector that detected the fire, the section that detected the fire is notified based on the address included in the fire detection signal. To do.

(Address setting by detector test)
As a detector test of the tunnel disaster prevention system,
The disaster prevention reception board sends a test start signal including a predetermined address to the signal line,
The fire detector conducts a predetermined test when it receives a test start signal from the primary side, which is the disaster prevention reception board side of the signal line to which it is connected, and receives it from the primary side when the test ends. The test start signal including the address obtained by changing the address included in the test start signal is transmitted to the secondary side of the signal line to which the test start signal is connected.

(Structure of test start signal)
The test start signal is composed of a test start pulse having a predetermined time width and an address pulse having a predetermined bit length in which a predetermined time width shorter than the time width of the test start pulse is assigned to 1 bit.

(Tunnel disaster prevention system)
The present invention relates to a tunnel disaster prevention system in which a plurality of fire detectors installed in a tunnel are connected to a disaster prevention reception panel via a signal line, and a fire is monitored by the disaster prevention reception panel.
The disaster prevention receiver panel sets a unique address for multiple fire detectors connected to the signal line by sending a test start signal containing a predetermined address to the signal line during the detector test. When a fire detection signal that includes the address set during the detector test is received, the section that detected the fire is notified based on the address included in the fire detection signal,
The fire detector conducts a prescribed test when it receives a test start signal from the primary side, which is the disaster prevention reception board side of the signal line to which it is connected, and when the test ends, it receives from the primary side. The test start signal including the address that has changed the address included in the test start signal is sent to the secondary side of the signal line to which it is connected, and the test start signal received from the primary side is detected when a fire is detected. A feature is that a fire detection signal including an included address is transmitted to the primary side.

(Basic effect)
The present invention relates to a tunnel disaster prevention system in which a plurality of fire detectors are arranged at predetermined intervals in the longitudinal direction of a tunnel wall surface to monitor a fire by a disaster prevention reception panel. By dividing into a group of a predetermined number of fire detectors including compartments and connecting to the signal line drawn from the disaster prevention reception board for each group, the disaster prevention reception board conducts a detector test for each signal line after system installation When a unique address is set for the specified number of fire detectors connected to the signal line and a fire detection signal containing the address set by the detector test is received from the fire detector, the address included in the fire detection signal Since it is configured to detect and notify the section that detected a fire based on the above, from connecting the fire detectors of multiple sections installed in the tunnel in a group to the signal line drawn from the disaster prevention reception board Since hardware such as fire reception circuits corresponding to the number of groups including multiple partitions can be installed on the disaster prevention reception panel, the hardware such as fire reception circuits can be reduced compared to the case where it is installed corresponding to the number of partitions. Even if the number of sections for automatic notification increases, it is not necessary to increase the size of the disaster prevention receiver cabinet, and the grouping of multiple sections also reduces the amount of wiring for signal lines, making it possible to reduce equipment costs. ..

In addition, the fire detectors for multiple sections connected to each signal line pulled out from the disaster prevention receiver are automatically set to unique addresses by the detector test by the disaster prevention receiver prior to the start of operation of the equipment. When a fire is detected during the operation of, the test start signal including the unique address set by the test is transmitted as a fire detection signal, so the correspondence between the address and the section must be registered in advance in the disaster prevention receiver. As a result, it is possible to specify and notify the automatic reporting section in which a fire has been detected from the address of the received fire detection signal, and it is possible to save the time and effort required to confirm the location of the fire detector that has detected a fire as in the conventional case.

(Effect of address setting by detector test)
In addition, as a detector test of the tunnel disaster prevention system, the disaster prevention reception board has a control unit that sends a test start signal containing a predetermined address to the signal line, and each fire detector connected to the signal line is on the disaster prevention reception board side. When a test start signal is received from the primary side, the specified test is started and the address included in the received test start signal is taken out and stored. When the test is finished, the received address is changed to the changed address. Since a control unit for transmitting a test start signal containing the test signal to the secondary side is provided, for example, the control unit of the fire detector is configured to transmit the test start signal including the address obtained by changing the value of the received address to the secondary side, The disaster prevention reception board sends a test start signal containing the start address to the fire detector connected to the beginning of the signal line, sets the address through the detector test, and after that, the fire that completes the detector test. For example, the test start signal including the address that the detector set to itself is incremented by 1, for example, is sent to the next fire detector, and the addresses are set autonomously one after another by the detector test. Since it is not necessary to perform communication control such as setting an address for each detector individually, the control load on the disaster prevention receiver side associated with the address setting is reduced, and a unique address is automatically set for the fire detector. It is possible to do.

(Effect of test start signal)
The test start signal is composed of a test start pulse having a predetermined time width and an address pulse having a predetermined bit length obtained by allocating a predetermined time width shorter than the time width of the test start pulse to 1 bit. Is set to 8 milliseconds and the address pulse is set to 1 millisecond per bit, for example, by assigning 22 milliseconds, a maximum 22-bit address can be set, and detection by a test start signal combining multiple test start pulses and address pulses is possible. Address is automatically set in the fire detector test, and when a fire is detected, the fire detector sends a fire detection signal that combines the fire pulse signal and the address pulse, and the fire detection signal is received by the fire prevention reception board. The address taken out from the signal can be used to reliably recognize and notify the automatic notification section where the fire was detected.

(System that automatically sets the address on the terminal device)
In another aspect of the present invention, in a system in which a plurality of terminal slaves whose addresses are not set are connected to a signal line pulled out from a master,
The master unit is provided with a control unit that sends an address setting signal containing a predetermined address to the signal line, and each terminal connected to the signal line includes the address setting signal received from the primary side, which is the master unit, in the terminal unit. When the address to be stored is extracted and stored, a control unit is provided for transmitting an address setting signal including the address obtained by changing the received address to the secondary side. Therefore, the master unit is the terminal device connected to the beginning of the signal line. When an address setting signal including the start address is transmitted to the device and the address is set, thereafter, an address setting signal including an address incremented by 1, for example, is added to the address set by the terminal slave unit that has completed the address setting. Since it is not necessary to send communication to the next terminal slave unit and perform address setting one after another autonomously, and it is not necessary to perform communication control to individually set an address for each terminal slave unit, the master unit side accompanying address setting This makes it possible to automatically and easily set the unique address of the terminal slave unit by reducing the control load of.

Block diagram showing the outline of the functional configuration of the tunnel disaster prevention system Explanatory drawing showing signal line connection by signal line to fire detector Block diagram showing the functional configuration of the fire detector Explanatory diagram showing the test start signal that combines the test start pulse and address pulse used in the detector test Time chart showing the signal waveform of each signal line in the fire detector test Explanatory diagram showing management information indicating the correspondence between the address of the fire detector registered in the disaster prevention reception board and the section Flow chart showing the control operation of the fire detector

[Overview of tunnel disaster prevention system]
FIG. 1 is a block diagram showing an outline of a functional configuration of a tunnel disaster prevention system. As shown in FIG. 1, a disaster prevention reception board 10 is installed in a monitoring center or the like in order to monitor an abnormality in the tunnel.

As for the tunnel for the motorway, an up-line tunnel and a down-line tunnel are constructed, and the fire detectors 14 are installed inside the tunnel along the wall surface in the longitudinal direction of the tunnel, for example, at intervals of 25 meters. The fire detector 14 sets monitoring areas on both sides of 25 meters on the left and right sides, detects flames due to a fire, and transmits a fire detection signal to the disaster prevention receiver panel 10. The fire detectors 14 installed in the tunnel at intervals of 25 meters form an automatic notification section by two adjacent fire detectors 14.

In the disaster prevention reception panel 10 of the present embodiment, assuming that the sections of the fire detector 14 installed in the tunnel are D1 to Dm, for example, eight fire detectors 14 included in the four sections are set as one group, It is divided into G1 to Gn, and the signal line 12 is drawn from the disaster prevention receiver board 10 for each of the divided groups G1 to Gn, and eight fire detectors 14 belonging to each group G1 to Gn are connected.

Therefore, the number of the receiving circuit units 18 provided in the disaster prevention receiving panel 10 need only be the same as the number of groups G1 to Gn, and the number of receiving circuit units 18 is greater than that in the conventional case where the receiving circuit units are provided for each partition. Can be reduced and the hardware can be simplified, whereby the case size of the disaster prevention receiver 10 can be downsized, the wiring amount of the signal line 12 can be reduced, and the facility cost can be reduced.

For example, in the case of a tunnel of 2400 meters, 96 fire detectors 14 are installed at intervals of 25 meters, and the number of divisions of the automatic notification section is 48 because two fire detectors are the unit. In this case, 48 units are required when the receiving circuit unit 18 is provided for each conventional partition unit, but in this embodiment, for example, 8 units of the fire detector 14 are grouped and connected to the signal line 12. Therefore, the number of receiving circuit units 18 can be reduced to twelve.

The number of fire detectors 14 connected to the same signal line 12 by group division is not limited to the eight shown in the figure, and the maximum address automatically set in the fire detectors 14 which will be clarified later by a detector test. Within this range, it is possible to group 8 or more units and further reduce the number of receiving circuit units 18.

The disaster prevention receiver board 10 includes a control unit 16, and the control unit 16 has a function realized by executing a program, for example, and uses a computer circuit having a CPU, a memory, various input/output ports, etc. as hardware. ..

The control unit 16 is provided with a receiving circuit unit 18 corresponding to the signal lines 12 drawn out for each of the groups G1 to Gn including the eight fire detectors 14, and the control unit 16 is provided with a speaker and a buzzer. An alarm unit 20 including an alarm indicator light, a display unit 22 including a liquid crystal display, an operation unit 24 including various switches, a modem 26 for connecting IG slave station equipment are provided, and ventilation equipment and an alarm display board are further provided. A P-type transmission unit 28 is provided in which the equipment, the radio rebroadcasting equipment, the TV monitoring equipment, the lighting equipment, and the fire extinguishing pump equipment are individually connected by a P-type signal line. The IG slave station equipment connected by the modem 26 is a communication equipment that connects the disaster prevention reception board 10 and other equipment to the remote management equipment.

After the system is installed, the control unit 16 of the disaster prevention receiver board 10 automatically conducts a detector test for each signal line 12 to automatically assign an address unique to each of the eight fire detectors 14 connected to each signal line 12 unit. Control to set.

In addition, when the control unit 16 of the disaster prevention receiver board 10 receives a fire detection signal including the address set by the detector test from the fire detector 14 during monitoring after the address setting by the detector test is completed, Based on the address included in the received fire detection signal, the section that detected the fire is discriminated and notified.

The detector test by the control unit 16 of the disaster prevention receiver board 10 is a predetermined operation involving control to transmit a test start signal including a predetermined start address, for example, address A=1 to the signal line 12 when a detector test operation is detected. Perform the detector test control of. Each fire detector 14 connected to the signal line 12 for the detector test control of the disaster prevention receiver board 10 starts a predetermined test operation when a test start signal is received from the primary side which is the disaster prevention receiver board 10 side. At the same time, the address A included in the received test start signal is taken out and stored, and when the test is completed, the received address A is incremented by 1 and the test start signal including the address A+1 is connected to the secondary side. Control is performed to transmit to the next fire detector 14, and while increasing the address A by 1, the eight fire detectors 14 autonomously send test start signals in order and automatically set a unique address.

[Fire detector configuration]
FIG. 2 is an explanatory diagram showing a signal line connection to the fire detector by a signal line, and FIG. 3 is a block diagram showing a functional configuration of the fire detector.

(Connection between fire detector and signal line)
As shown in FIG. 2, the power line 34, the common line 36, the fire signal line 38, the signal line under test 40, the test power line 42, 44, and the test start signal line are connected to the signal line 12 drawn out from the disaster prevention receiver board 10. 46a is included.

FIG. 2 shows the connection between the first fire detector 14-1 near the disaster prevention reception board 12 side and the next fire detector 14-2 and the signal line 12, and the fire detectors 14-1, 14 are shown. -2 is connected in parallel to the power line 34, the common line 36, the fire signal line 38, the signal line under test 40, and the test power lines 42 and 44, but the test start signal line 46a from the disaster prevention receiver board 10 Is connected to the fire detector 14-1, and the test start signal line 46b is output-connected to the fire detector 14-1 on the primary side and connected to the fire detector 14-2 on the secondary side. ing. That is, the fire detectors 14-1 and 14-2 are connected in series to the disaster prevention receiver board 10 by the test start signal lines 46a and 46b.

The fire detectors 14-1 and 14-2 are arranged side by side and are provided with a left-eye light receiving unit 30a and a right-eye light receiving unit 30b, and a range of 25 meters on the left and right is set as a monitoring area, and a flame due to a fire is detected to detect a fire detection signal. Is transmitted to the disaster prevention reception board 10. In addition, in the following description, when it is not necessary to distinguish between the fire detectors 14-1 and 14-2, the fire detector 14 is used.

(Fire detector configuration)
As shown in FIG. 3, the fire detector 14-1 includes a control unit 50, and the control unit 50 has a function realized by executing a program, for example, and has hardware such as a CPU, a memory, and various input/output ports. A computer circuit equipped with is used.

For the control unit 50, a left-eye fire detection unit 48a, a right-eye fire detection unit 48b, a test transmission unit 52, and a fire transmission unit 54 are provided. A signal line under test 40 and test power supply lines 42 and 44 are connected in parallel to the test transmission section 52, a test start signal line 46a on the primary side is input-connected, and a test start signal line 46b on the secondary side is connected. The output is connected.

The left-eye fire detection unit 48a and the right-eye fire detection unit 48b monitor the fire by, for example, two-wavelength flame detection. That is, the left-eye fire detection unit 48a and the right-eye fire detection unit 48b select the radiant energy of 4.4 to 4.5 μm, which is the resonance emission band of CO ₂ peculiar to the flame, by the narrow wavelength optical wavelength bandpass filter. After passing (passing), the radiation energy is detected by the light receiving sensor, photoelectrically converted, and then subjected to predetermined processing such as amplification and processed into a light receiving signal corresponding to the amount of energy, and the relative ratio of the light receiving signal level is obtained. , The presence or absence of flame is determined by comparing with a predetermined threshold value.

When the control unit 50 of the fire detector 14-1 detects a fire by determining whether there is a flame by the left-eye fire detection unit 48a or the right-eye fire detection unit 48b, it instructs the fire transmission unit 54 to give a predetermined time. Control is performed to periodically transmit a fire detection signal in which a fire pulse having a predetermined pulse width is combined with an address pulse indicating a self-address at intervals to the fire signal line 38.

In addition, the control unit 50 of the fire detector 14-1 controls the detection voltage of the disaster prevention receiver board 10 by changing the polarization voltage output to the test power supply lines 42 and 44 and the address A= output to the test start signal line 46a. When a test start signal including 1 is received via the test transmission unit 52, a control for performing a predetermined test operation on the right eye fire detection unit 48b and the left eye fire detection unit 48a and transmitting the fire detection signal by the test is performed. To do.

Further, when the control unit 50 of the fire detector 14 receives the test start signal, the control unit 50 extracts the address A=1 included in the test start signal as a self address and stores it in the memory. In order to set the address of -2, the received address A is incremented by one, and the incremented address A=2 is included in the test start signal when the detector test is completed. Control to output to the test start signal line 46b on the side is performed. The received address A may be changed by increasing the address by 1 (A=A+1) or by increasing the address by two or more values, or by multiplying by a predetermined coefficient. It can be an address.

(Test start signal)
FIG. 4 is an explanatory diagram showing a test start signal in which a test start pulse and an address pulse used in the detector test are combined.

FIG. 4A shows a format of the test start signal 60. For example, a test start pulse 62 having a pulse width of 8 milliseconds and an address pulse 64 of 22 milliseconds are combined, and the address pulse 64 is a 1-bit pulse of 1 millisecond. It is possible to set a 22-bit length address that is a combination of 66 addresses.

4B to 4I are test start signals 60-1 to 60-1 for automatically setting addresses A=1 to 8 to the eight fire detectors 14 provided in the group G1 shown in FIG. 60-8 is shown. For the test start signals 60-1 to 60-8, the test start pulse 62 is fixedly arranged at the beginning, and subsequently the addresses A=1 to 8 are displayed in binary 1000...0, 0100...0,... 000... Address pulses of 0 are combined.

(Detector test operation)
FIG. 5 is a time chart showing the signal waveform of each signal line in the fire detector test, and takes the detector test of the fire detectors 14-2 and 14-2 shown in FIG. 2 as an example.

When carrying out the detector test, the disaster prevention receiver board 10 performs the reversal control to alternately switch the polarities of the test voltage with respect to the test power supply lines 42 and 44 at predetermined time intervals, as shown in FIGS. The test of the right-eye fire detection unit 48b of the fire detector 14 can be performed by inverting the test power supply line 42 as positive.

When the fire detector 14-1 receives the test start signal 60-1 shown in FIG. 4B via the test start signal line 46a at time t1, the test start pulse 62 causes the test power supply line 44 to turn positive. The right eye fire detector 48b of the fire detector 14 is tested in synchronization with the poles, and when the test is performed normally, a fire pulse signal from the test is fired to the disaster prevention receiver board 10 as shown in FIG. 5(G). It is transmitted via the signal line 38.

Subsequently, the left-eye fire detection unit 48a of the fire detector 14 is tested in synchronization with the positive polarity of the test power supply line 42, and when the test is normally performed, as shown in FIG. The fire pulse signal from the test is transmitted to the disaster prevention reception board 10 through the fire signal line 38. Further, during the detector test, as shown in FIG. 5(F), the in-test signal is output to the in-test signal line 40, and the other fire detectors including the disaster prevention receiver 10 and the fire detector 14-2 are output. Recognize that the detector is being tested.

The fire detector 14-1 fetches the address A=1 from the received test start signal 60-1, stores it in the memory as its own address, and increments it by 1 as the address to be set in the next fire detector 14-2. Generate A=2.

Subsequently, the fire detector 14-1 starts the test shown in FIG. 4C on the test start signal line 46b on the secondary side at the timing of time t3 when the test power supply line 42 becomes positive when the detector test ends. The test start signal 60-2 in which the pulse 62 is combined with the address pulse 64 of the address A=2 is transmitted.

The fire detector 14-2 arranged second receives the test start signal 60-2 transmitted by the fire detector 14-1 arranged on the primary side from the test start signal line 46b, and receives the test start signal 60-2 from the fire detector 14-1. Perform the detector test as before. Further, the fire detector 14-2 takes out the address A=2 from the received test start signal 60-2, stores it as the self address in the memory, and increments it by 1 as the address to be set in the next fire detector 14-3. The generated address A=3 is generated.

Subsequently, the fire detector 14-2 starts the test shown in FIG. 4D on the test start signal line 46c on the secondary side at the timing of time t5 when the test power supply line 42 becomes positive after the detector test is completed. The test start signal 60-3 in which the pulse 62 is combined with the address pulse 64 of the address A=3 is transmitted.

Hereinafter, for the remaining six fire detectors following the fire detector 14-2, a unique address A=3 to 8 is automatically set through a similar detector test.

(Management information of disaster prevention reception board)
FIG. 6 is an explanatory diagram showing management information indicating the correspondence between the addresses of fire detectors registered in the disaster prevention reception board and the sections.

In the memory provided in the control unit 16 of the disaster prevention reception panel 10 shown in FIG. 1, the correspondence between the addresses of the eight fire detectors 14 connected in signal line units shown in FIG. 6 and the automatic notification sections D1 to Dm. Is stored and registered in advance.

In the management information of FIG. 6, the systems L1 to Ln are set for each signal line 12, and, for example, the sections D1 to D4 are assigned to the fire detectors 14 corresponding to the addresses 1 to 8 of the eight fire detectors corresponding to the system L1. It is set for every 2 units.

By registering such management information in the disaster prevention reception panel 10 in advance, when a fire detection signal is received from the fire detector 14, the management information is searched by the address included in the fire detection signal and the corresponding section is opened. Acquire and display the automatic notification section that detected the fire on the display of the display unit 22, without having to go to the inside of the tunnel and check the site, know the automatic notification section that detected the fire and take appropriate and prompt action. Is possible.

(Control action of fire detector)
FIG. 7 is a flowchart showing the control operation of the fire detector. As shown in FIG. 7, when the control unit 50 of the fire detector 14 detects a reversal in which the test power supply line 42 is positive in step S1 in response to the reversal control by the detector test of the disaster prevention receiver panel 10 in step S1. In step S2, when the reception of the test start signal from the primary side is detected in step S2, the process advances to step S3, the address A included in the test start signal is extracted and stored in the memory as a self address, and then, 1 is added to the received address A to set A=A+1 for setting the address of the fire detector.

Then, in step S5, a signal under test is transmitted to the signal line under test 40 to perform a test on the right-eye fire detection unit 48b side, and when flame detection is determined by the test, a fire detection signal is transmitted to the disaster prevention receiver panel 10.

Subsequently, when the polarity of the test power supply line 44 is detected to be positive in step S6, the process proceeds to step S7, the left-eye fire detection unit 48a side is tested, and if flame detection is determined by the test, a fire detection signal is sent to the disaster prevention receiver board. Send to 10.

Subsequently, when a repolarization that makes the test power supply line 42 side positive again is detected in step S8, it is determined that the detector test has ended, the output of the in-test signal is stopped in step S9, the process proceeds to step S10, and in step S4. A test start signal including the changed address A is generated and transmitted to the test start signal line on the secondary side.

When the automatic address setting by the detector test is completed, the process proceeds to step S11 to enter the fire detection monitoring state, and when the fire detection is determined in step S11, the process proceeds to step S12 to include the self-address stored in the detector test. It generates a fire detection signal and periodically transmits the fire detection signal.

[Modification of the present invention]
(System that automatically sets the address on the terminal device)
The point that addresses are automatically set for a plurality of fire detectors connected to a signal line through the detector test shown in the tunnel disaster prevention system of the above-mentioned embodiment is that the address is not set on the signal line drawn from a general proper master unit. It can be applied to a system in which multiple terminal slaves with settings are connected.

In such a system, the master unit is provided with a control unit for transmitting an address setting signal including a predetermined address to the signal line, and each terminal slave unit connected to the signal line has a primary unit on the master unit side. When the address included in the address setting signal received from the side is taken out and stored, a control unit for transmitting the address setting signal including the address obtained by changing the received address to the secondary side is provided.

By providing such a system configuration, the master unit sends an address setting signal including the start address to the terminal slave unit connected to the start of the signal line to set the address, and thereafter, the address setting is performed. The terminal slave unit that has terminated the step transmits an address setting signal including the address set by itself to the next terminal slave unit, for example, to autonomously perform address setting one after another, and the master unit transmits each address to each terminal slave. Since there is no need to perform communication control to set the address individually for each device, it is possible to reduce the control load on the master device side associated with the address setting and easily and reliably automatically set the unique address for the terminal device. And

(Detector test)
The test of the fire detector by the disaster prevention receiver shown in the above embodiment is an example, and the fire detector transmits the test start signal including the address, and the fire detector receives the test start signal from the primary side. As long as it includes the point that the detector test is performed, the address is extracted and stored as a self address, and the test start signal including the address changed at the end of the test is transmitted to the secondary side, The present invention can be applied to appropriate control of the detector test without being restricted by the output of the signal during the test and the like.

(Other)
Further, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: disaster prevention reception board 12: signal lines 14, 14-1, 14-2: fire detector 16, 50: control unit 18: reception circuit unit 30a: left eye light receiving unit 30b: right eye light receiving unit 34: power line 36 : Common line 38: fire signal line 40: in-test signal line 42, 44: test power line 46a, 46b, 46c: test start signal line 48a: left eye fire detection unit 48b: right eye fire detection unit 52: test transmission unit 54 : Fire transmitter 60: Test start signal 62: Test start pulse 64: Address pulse 66:1 bit pulse

Claims (4)

In a tunnel disaster prevention system where multiple fire detectors are placed in a tunnel and fire is monitored by a disaster prevention reception board,
The plurality of fire detectors installed in the tunnel is divided into a group of a predetermined number of fire detectors including a plurality of sections, and each group is connected to the disaster prevention reception board via a signal line,
The disaster prevention reception panel is unique to the predetermined number of fire detectors connected to the signal line by performing a detector test that causes the fire detector to perform a predetermined test operation for each of the signal lines. When an address is set and a fire detection signal containing the address set by the detector test is received from the fire detector that detected a fire, a section that detects a fire based on the address included in the received fire detection signal A tunnel disaster prevention system characterized by discriminating and informing.
In the tunnel disaster prevention system according to claim 1, as the detector test,
The disaster prevention reception board transmits a test start signal including a predetermined address to the signal line,
The fire detector performs a predetermined test when a test start signal is received from the primary side, which is the disaster prevention reception board side of the signal line to which the fire detector is connected, and the fire detector performs the predetermined test when the test is completed. A tunnel disaster prevention system, which transmits a test start signal including an address obtained by changing an address included in the start signal received from a secondary side to the secondary side of the signal line to which the self is connected.
3. The tunnel disaster prevention system according to claim 2, wherein the test start signal has a test start pulse of a predetermined time width and an address of a predetermined bit length in which a predetermined time width shorter than the time width of the test start pulse is assigned to 1 bit. A tunnel disaster prevention system characterized by being composed of pulses.
In a tunnel disaster prevention system that connects a plurality of fire detectors installed in a tunnel to a disaster prevention reception board via a signal line, and monitors the fire with the disaster prevention reception board,
The disaster prevention reception board sets a unique address to the plurality of fire detectors connected to the signal line by transmitting a test start signal including a predetermined address to the signal line during a detector test, When a fire detection signal containing the address set at the time of the detector test is received from the fire detector, the section in which the fire is detected is notified based on the address included in the fire detection signal and notified.
The fire detector performs a predetermined test when it receives the test start signal from the primary side, which is the disaster prevention reception board side of the signal line to which the fire detector is connected, and when the test is finished, the fire detector performs the predetermined test. When a fire is detected by transmitting a test start signal including an address obtained by changing the address included in the test start signal received from the primary side to the secondary side of the signal line to which the self is connected, the primary side is detected. A tunnel disaster prevention system, which transmits a fire detection signal including an address included in a test start signal received from the primary side.

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