JP2017021562A - Tunnel disaster prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel disaster prevention system capable of reducing a size and a cost of the housing by simplifying a structure of a disaster prevention reception board even if the number of zones installed with a fire detector is large.SOLUTION: A fire disaster detector 14 in a tunnel is divided into Groups G1 etc., including a plurality of zones D1 to D2 and D5 to D8, and is connected to a signal line 12 from a disaster prevention reception board 10 for each group. The disaster prevention reception board 10 transmits a test start signal including an address to a signal line 12. A fire detector 14 starts a test upon receipt of the test start signal, and automatically sets an address included in the received test start signal as a self-address. The test start signal including an address which increases the address received by one address is transmitted to a second side when the test is completed. When the fire is detected by the fire detector 14 after the test, the fire detection signal including the address stored by the test is transmitted to the disaster prevention reception board 10. The disaster prevention reception board 10 determines and reports a zone which detects the fire from the address of the received disaster detection signal.SELECTED DRAWING: Figure 1

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 monitoring panel.

  Conventionally, emergency facilities have been installed in tunnels for exclusive use of automobiles and the like in order to protect people and vehicles from fire accidents that occur in the tunnel.

  Such emergency facilities are equipped with fire detectors, manual notification devices, emergency telephones for fire monitoring and reporting, fire hydrant devices for fire extinguishing and fire spread prevention, and tunnel housings. In order to protect against fire, a water spray is installed to spray fire-extinguishing water from the water spray head to lower the temperature in the tunnel, and by installing a disaster prevention receiver that monitors and controls the terminal equipment of these emergency facilities, A disaster prevention system has been established.

  A tunnel disaster prevention system composed of a disaster prevention receiving board and terminal equipment is roughly divided into an R type transmission system and a P type direct transmission system. The R-type transmission method enables individual management in which a fire detector with an address set in a signal line is connected and detection is performed in units of fire detectors by transmission control.

  In the P-type direct delivery system, fire detectors are divided into predetermined automatic notification section units, and a plurality of fire detectors belonging to the same section are connected to a signal line drawn out from the disaster prevention reception board for each section and monitored. The fire judgment by the P-type direct-sending disaster prevention reception board outputs a fire pulse signal at a predetermined time interval when the fire detector detects a fire, so the first pulse is processed as a fire warning signal. Subsequently, the disaster prevention reception panel determines that a fire has occurred when a predetermined time has elapsed from the reception of the first pulse and the fire reception circuit has been restored once and a fire pulse signal has been received from the fire detector again within the predetermined time from the restoration. If the fire pulse signal is not received again within a specified time after recovery, the fire alarm is treated as a non-fire.

Japanese Patent Laid-Open No. 2002-246962 JP-A-11-128381

  However, such a conventional P-type direct-sending tunnel disaster prevention system was designed to monitor fire detectors 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 board is increased, and the cost is increased.

  For example, in the case of a tunnel of 2400 meters, if the fire detector monitoring area is 25 meters on both sides, 96 fire detectors are required, and the automatic notification section is set to include two fire detectors. Therefore, there are 48 sections. Correspondingly, the reception circuit of the disaster prevention receiving board requires 48 inputs, and the housing size of the disaster prevention receiving board is increased and the cost is also increased.

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

  An object of the present invention is to provide a tunnel disaster prevention system that can reduce the cost without increasing the housing size and wiring amount of the disaster prevention reception panel even when the number of automatic notification sections increases.

(Tunnel disaster prevention system)
The present invention is a tunnel disaster prevention system in which a plurality of fire detectors are arranged at predetermined intervals in the longitudinal direction of the tunnel wall surface and the fire is monitored by a disaster prevention receiver.
Divide multiple fire detectors installed in the tunnel into a predetermined number of fire detector groups including multiple sections and connect them to the signal lines drawn from the disaster prevention receiver for each group.
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 for each signal line after the system is installed, and sets it from the fire detector to the detector test. When a fire detection signal including an address is received, a section in which a fire is detected is determined and notified based on the address included in the fire detection signal.

(Address setting by detector test)
As a detector test of the tunnel disaster prevention system,
The disaster prevention reception board includes a control unit that transmits a test start signal including a predetermined address to the signal line.
Each fire detector connected to the signal line starts a predetermined test when it receives a test start signal from the primary side which is the disaster prevention reception board side, and takes out and stores the address included in the received test start signal. And a control unit that transmits a test start signal including an address obtained by changing the received address when the test is completed to the secondary side.

(Secondary transmission of changed address)
The control unit of the fire detector transmits a test start signal including an address obtained by changing the value of the received address to the secondary side.

(Configuration of test start signal)
The test start signal includes 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 one bit.

(System that automatically sets the address to the terminal slave unit)
In another embodiment of the present invention, in a system in which a plurality of terminal slave units whose addresses are not set are connected to the signal line drawn from the master unit,
The base unit is provided with a control unit that transmits an address setting signal including a predetermined address to the signal line.
When each terminal slave unit connected to the signal line extracts and stores the address contained in the address setting signal received from the primary side which is the master unit side, the address setting signal including the address obtained by changing the received address is secondary. The control part which transmits to the side is provided.

(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 and a fire is monitored by a disaster prevention receiver, and a plurality of fire detectors installed in a tunnel are provided. Divide into groups of a predetermined number of fire detectors, including compartments, and connect to the signal line drawn from the disaster prevention receiver for each group, and the disaster prevention receiver performs a detector test for each signal line after system installation. When a unique address is set for a predetermined number of fire detectors connected to the signal line and a fire detection signal including the address set by the detector test is received from the fire detector, the address included in the fire detection signal Because it is configured to detect and notify the section where a fire is detected based on the fire, the fire detection of multiple sections installed in the tunnel is connected to the signal line drawn from the disaster prevention reception board. Compared to the case where it is provided corresponding to the number of divisions, it is only necessary to provide the fire prevention circuit etc. corresponding to the number of groups including multiple divisions in the disaster prevention receiving panel. Hardware such as fire receiving circuits can be reduced, and even if the number of sections for automatic notification increases, there is no need to increase the housing size of the disaster prevention reception panel, and the number of signal lines is reduced by grouping multiple sections, Reduces equipment costs.

  In addition, fire detectors for multiple sections connected to each signal line drawn out from the disaster prevention reception board are automatically set with a unique address by a detector test by the disaster prevention reception board prior to the start of equipment operation. When a fire is detected during operation, a test start signal including a unique address set by the test is sent as a fire detection signal, so the correspondence between addresses and sections is registered in advance in the disaster prevention reception board. Thus, it is possible to identify and notify the automatic notification section that detects the fire from the address of the received fire detection signal, and it is possible to save the trouble of confirming the fire detector that has detected the fire in the conventional manner.

(Effect of address setting by detector test)
In addition, as a detector test of the tunnel disaster prevention system, the disaster prevention receiver has a control unit that transmits a test start signal including a predetermined address to the signal line, and each fire detector connected to the signal line is connected to the disaster prevention receiver side. When a test start signal is received from the primary side, a predetermined test is started, and the address included in the received test start signal is extracted and stored, and when the test is completed, the received address is changed. For example, the control unit of the fire detector transmits a test start signal including an address obtained by changing the value of the received address to the secondary side. The disaster prevention reception board sends the test start signal including the head address to the fire detector connected to the head of the signal line and sets the address through the detector test. Sends a test start signal that includes an address that is increased by one, for example, the address set by the fire detector that has completed the detector test to the next fire detector, and sets address by detector test one after another. Because it is not necessary to perform communication control such as setting addresses individually for each fire detector from the disaster prevention receiving board, it is easy and reliable to reduce the control burden on the disaster prevention receiving board side due to address setting It is possible to automatically set a unique address for the detector.

(Effects 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 one bit. 8 ms, address pulses are 1 ms per bit, for example, 22 ms can be assigned, enabling a maximum 22-bit address setting, and detection by a test start signal that combines multiple test start pulses and address pulses The fire detector automatically sets the address to each fire detector in the fire 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 received by the disaster prevention receiver The automatic notification section where the fire is detected is surely recognized by the address extracted from the signal and can be notified.

(System that automatically sets the address to the terminal slave unit)
In another embodiment of the present invention, in a system in which a plurality of terminal slave units whose addresses are not set are connected to the signal line drawn from the master unit,
The base unit is provided with a control unit that transmits an address setting signal including a predetermined address to the signal line. Each terminal slave unit connected to the signal line is included in the address setting signal received from the primary side serving as the base unit. Since the control unit for transmitting the address setting signal including the address obtained by changing the received address to the secondary side is provided when the address to be stored is extracted and stored, the master unit is connected to the head of the signal line. When the address setting signal including the head address is transmitted to the machine and the address is set, the address setting signal including the address obtained by incrementing the address set by itself by the terminal slave unit that has completed the address setting is set. Is it unnecessary to perform communication control to set the address autonomously one after another by sending to the next terminal slave unit and setting the address individually for each terminal slave unit from the master unit? It makes it possible to automatically set a unique address to easily and reliably Tanmatsuko machine to reduce the control load of the base-side with the address setting.

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 drawing showing the test start signal that combines the test start pulse and the address pulse used in the detector test Time chart showing signal waveform of each signal line in fire detector test Explanatory drawing which showed management information which shows correspondence of address of fire detector registered in disaster prevention receiving board and division Flow chart showing control operation of fire detector

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

  As the tunnel for the automobile road, an up-line tunnel and a down-line tunnel are constructed, and fire detectors 12 are installed inside the tunnel at intervals of, for example, 25 meters along the wall surface in the tunnel longitudinal direction. The fire detector 12 sets monitoring areas on both sides that are 25 meters on the left and right sides, detects a flame due to a fire, and transmits a fire detection signal to the disaster prevention receiving board 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 receiving board 10 of the present embodiment, if the sections of the fire detectors 14 installed in the tunnel are D1 to Dm, for example, eight fire detectors 14 included in four sections are grouped into one group. The signal line 12 is drawn from the disaster prevention receiving board 10 for each of the divided groups G1 to Gn, and eight fire detectors 14 belonging to the groups G1 to Gn are connected.

  For this reason, the receiving circuit part 18 provided in the disaster prevention receiving board 10 should just provide the number corresponding to the number of groups of groups G1-Gn, and the number of that compared with the case where the receiving circuit part is provided in the conventional division unit. This makes it possible to simplify the hardware, thereby reducing the size of the housing of the disaster prevention receiving board 10, reducing the amount of wiring of the signal line 12, and reducing the equipment cost.

  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 automatic notification sections is 48 because it is a unit of two fire detectors. In this case, when the receiving circuit unit 18 is provided for each conventional section, 48 units are required. However, in this embodiment, for example, eight 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 12.

  Note that 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, but is the maximum address automatically set through the detector test to the fire detector 12 which will be clarified later. In this range, it is possible to group eight or more units and further reduce the number of receiving circuit units 18.

  The disaster prevention receiving board 10 includes a control unit 16, and the control unit 16 is a function realized by, for example, execution of a program. As hardware, a computer circuit having a CPU, a memory, various input / output ports, and the like are used. .

  For the control unit 16, a receiving circuit unit 18 is provided corresponding to the signal line 12 drawn for each of the groups G1 to Gn including the eight fire detectors 14, and for the control unit 16, a speaker, a buzzer, An alarm unit 20 provided with an alarm indicator lamp, a display unit 22 provided with a liquid crystal display, an operation unit 24 provided with various switches, a modem 26 for connecting the IG slave station equipment, a ventilation equipment, an alarm display board A P-type transmission unit 28 is provided in which equipment, radio rebroadcasting equipment, television monitoring equipment, lighting equipment, and fire 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 receiving board 10 and other equipment to the remote management equipment.

  The control unit 16 of the disaster prevention receiving board 10 automatically performs a detector test for each signal line 12 after installing the system, thereby automatically assigning unique addresses to the eight fire detectors 14 connected to the signal line 12 unit. Control to set.

  Moreover, when the control part 16 of the disaster prevention receiving board 10 receives the fire detection signal containing the address set by the detector test from the fire detector 14 during the monitoring after finishing the address setting by the detector test, Based on the address included in the received fire detection signal, control is performed to determine and notify the section where the fire is detected.

  The detector test by the control unit 16 of the disaster prevention receiving board 10 is a predetermined test with control for transmitting 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 detector test control. Each fire detector 14 connected to the signal line 12 for the detector test control of the disaster prevention reception board 10 starts a predetermined test operation when receiving a test start signal from the primary side which is the disaster prevention reception board 10 side. At the same time, the address A included in the received test start signal is extracted 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 to transmit to the next fire detector 14 is performed, and while the address A is incremented by one, the eight fire detectors 14 automatically set a unique address while sending the test start signal in order.

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

(Connection of fire detector and signal line)
As shown in FIG. 2, the signal line 12 drawn from the disaster prevention receiver 10 includes a power line 34, a power common line 36, a fire signal line 38, a signal line 40 under test, test power lines 42 and 44, and a test start signal. Line 46a is included.

  FIG. 2 shows the connection between the first fire detector 14-1 and the next fire detector 14-2 close to the disaster prevention reception board 12 side 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 power common line 36, the fire signal line 38, the signal line 40 under test, and the test power lines 42 and 44 by the connection box 32. The test start signal line 46a is connected to the fire detector 14-1, and the test start signal line 46b is output-connected to the primary fire detector 14-1, and the secondary fire detector 14 is connected. -2 input connection. That is, the fire detectors 14-1 and 14-2 are connected in series to the disaster prevention receiving board 10 by the test start signal lines 46 a and 46 b.

  The fire detectors 14-1 and 14-2 are provided side by side with a left eye light receiving unit 30a and a right eye light receiving unit 30b, set a range of 25 meters left and right as a monitoring area, detect a fire flame, and detect a fire detection signal. Is transmitted to the disaster prevention receiving board 10. 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. The control unit 50 is a function realized by executing a program, for example, as a hardware, a CPU, a memory, various input / output ports, and the like. Use a computer circuit equipped with

  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 test signal line 40 and test power supply lines 42 and 44 are connected in parallel to the test transmission unit 52, a primary test start signal line 46a is connected to the input, and a secondary test start signal line 46b is connected. Output connection.

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 a resonance emission band of CO ₂ peculiar to the flame, by a narrow band optical wavelength bandpass filter. Transmitting (passing), detecting the radiation energy by a light receiving sensor, photoelectrically converting it, applying predetermined processing such as amplification, processing it to a light receiving signal corresponding to the amount of energy, and taking the relative ratio of the light receiving signal level The presence or absence of flame is determined by comparing with a predetermined threshold.

  The control unit 50 of the fire detector 14-1 instructs the fire transmission unit 54 for a predetermined time when a fire is detected by the left eye fire detection unit 48a or the right eye fire detection unit 48b. Control is performed to periodically transmit a fire detection signal, which is a combination of a fire pulse having a predetermined pulse width and an address pulse indicating its own address, to the fire signal line 38 at intervals.

  Further, the control unit 50 of the fire detector 14-1 outputs the inversion voltage output to the test power supply lines 42 and 44 and the address A = output to the test start signal line 46 a in accordance with the detector test of the disaster prevention receiver 10. When a test start signal including 1 is received via the test transmission unit 52, control is performed to perform a predetermined test operation on the right eye fire detection unit 48a and the left eye fire detection unit 48a to transmit a fire detection signal based on the test. Do.

  Further, when receiving the test start signal, the control unit 50 of the fire detector 14 takes out the address A = 1 included in the fire start signal as a self address and stores it in the memory, and the next fire detector 14. -2 for the address setting, the received address A is increased by one address A = A + 1 = 2, and when the detector test is completed, the increased address A = 2 is included in the test start signal and the secondary address The control to output to the test start signal line 46b on the side is performed. The received address A may be changed to an address increased by a plurality of two or more values, in addition to the address A increased by one (A + 1), or increased by a predetermined coefficient. It may be an address.

(Test start signal)
FIG. 4 is an explanatory diagram showing a test start signal obtained by combining a test start pulse and an address pulse used in the detector test.

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

  4 (B) to 4 (I) show test start signals 60-1 to 60-1 for automatically setting addresses A = 1 to 8 in the eight fire detectors 14 provided in the group G1 shown in FIG. 60-8. The test start signals 60-1 to 60-8 are fixedly arranged with a test start pulse 62 at the head, and subsequently, addresses A = 1 to 8 are displayed in binary notation 1000... 0, 0100. Address pulses that become 000... 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, taking the detector test of the fire detectors 14-2 and 14-2 shown in FIG. 2 as an example.

  When performing a detector test, the reception control panel 10 performs polarity switching control that alternately switches the polarity of the test voltage with respect to the test power supply lines 42 and 44 at a predetermined time interval, as shown in FIGS. The test of the right-eye fire detection unit 46b of the fire detector 14 is made possible by the reversal of the test power supply line 42 as a plus.

  When the fire detector 14-1 receives the test start signal 66-1 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 be positive. The right-eye fire detector 46b of the fire detector 14 is tested in synchronization with the pole, and when the test is performed normally, a fire pulse signal from the test is fired to the disaster prevention receiver 10 as shown in FIG. The signal is transmitted through the signal line 38.

  Subsequently, the test of the left-eye fire detection unit 46a of the fire detector 14 is performed in synchronization with the reversal of the test power supply line 42 as positive, and when the test is normally performed, as shown in FIG. The fire pulse signal from the test is transmitted to the disaster prevention receiving board 10 through the fire signal line 38. Further, during the detector test, as shown in FIG. 5 (F), a signal under test is output to the signal line 40 during the test, and other fire detectors including the disaster prevention receiver 10 and the fire detector 14-2 are output. Recognize that the detector test is in progress.

  The fire detector 14-1 extracts the address A = 1 from the received test start signal 60-1, stores it as a self-address in the memory, and increments the address by one 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 time t3 when the test power supply line 42 becomes positive when the detector test is finished. A test start signal 60-2 in which the address pulse 64 of address A = 2 is combined with the pulse 62 is transmitted.

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

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

  Thereafter, the unique addresses A = 3 to 8 are automatically set through the same detector test for the remaining six fire detectors following the fire detector 14-2.

(Management information for disaster prevention reception board)
FIG. 6 is explanatory drawing which showed the management information which shows a response | compatibility with the address and division of the fire detector registered into the disaster prevention receiving board.

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

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

  By registering such management information in the disaster prevention receiving board 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 searched. Acquired and displayed the automatic notification section that detected the fire on the display of the display unit 22, knowing the automatic notification section that detected the fire without going to the tunnel and needing on-site confirmation, appropriate and quick action Is possible.

(Fire detector control operation)
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 S <b> 1 in response to the reversal control by the detector test of the disaster prevention receiver 10, the step is performed. Proceeding to S2, if reception of the test start signal from the primary side is detected in Step S2, the process proceeds to Step S3, where the address A included in the test start signal is extracted and stored in the memory as a self address, 1 is added to the received address A to set A = A + 1 for the fire detector address setting.

  Subsequently, in step S5, a signal under test is transmitted to the signal line 40 under test to perform a test on the right eye fire detection unit 48b side. When flame detection is determined by the test, a fire detection signal is transmitted to the disaster prevention receiving board 10.

  Subsequently, when a reversal in which the test power supply line 44 is positive is detected in step S6, the process proceeds to step S7 to perform a test on the left-eye fire detection unit 48a side. 10 to send.

  Subsequently, when a reversal in which the test power supply line 42 side is again positive is detected in step S8, it is determined that the detector test has ended, and in step S9, the output of the signal under test is stopped, and 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 secondary test start signal line.

When the automatic address setting by the detector test is completed, the process proceeds to step S11 to enter a fire detection monitoring state. When the fire detection is determined in step S11, the process proceeds to step S12 and includes the self address stored in the detector test. Generate fire detection signals and periodically send fire detection signals.
[Modification of the present invention]
(System that automatically sets the address to the terminal slave unit)
The point that addresses are automatically set for a plurality of fire detectors connected to the signal line through the detector test shown in the tunnel disaster prevention system of the above embodiment is that the address is not set to the signal line drawn from a general appropriate main unit. It can be applied to a system in which multiple terminal slave units are connected.

  In such a system, a control unit that transmits an address setting signal including a predetermined address to the signal line is provided in the base unit, and each terminal slave unit connected to the signal line has a primary side on the base side. When an address included in the address setting signal received from the side is extracted and stored, a control unit is provided that transmits to the secondary side an address setting signal including an address obtained by changing the received address.

  By providing such a system configuration, the base unit transmits an address setting signal including the head address to the terminal slave unit connected to the head of the signal line to set the address. For example, the terminal set that has completed the process of transmitting the address setting signal including the address set by itself to the next terminal set is autonomously performed one after another. Since it is not necessary to perform communication control to set the address individually for each machine, it is possible to automatically and uniquely set a unique address for the terminal slave unit by reducing the control burden on the base unit side associated with address setting. And

(Detector test)
The test of the fire detector by the disaster prevention receiver shown in the above embodiment is an example, the test start signal including the address is transmitted from the disaster prevention receiver, and the fire detector receives the test start signal from the primary side. If 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 control of an appropriate detector test without being restricted by the output of a signal under test.

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

10: Disaster prevention receiving 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: Test signal line 42, 44: Test power supply lines 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 transmission unit 60: Test start signal 62: Test start pulse 64: Address pulse 66: 1 bit pulse

Claims (5)

In a tunnel disaster prevention system in which multiple fire detectors are arranged at predetermined intervals in the longitudinal direction of the tunnel wall surface and the fire is monitored by a disaster prevention receiver.
Divide multiple fire detectors installed in the tunnel into a predetermined number of fire detector groups including multiple sections and connect them to the signal lines drawn from the disaster prevention receiver for each group.
The disaster prevention receiving board sets a unique address for a predetermined number of the fire detectors connected to the signal line by performing a detector test for each signal line after system installation, and from the fire detector When a fire detection signal including an address set by a detector test is received, a section in which a fire is detected is determined and notified based on the address included in the received fire detection signal. Tunnel disaster prevention system.
In the tunnel disaster prevention system according to claim 1, as the detector test,
The disaster prevention receiving board includes a control unit that transmits a test start signal including a predetermined address to the signal line,
Each fire detector connected to the signal line starts a predetermined test when it receives a test start signal from the primary side which is the disaster prevention reception board side and takes out an address included in the received test start signal A tunnel disaster prevention system comprising: a control unit that transmits a test start signal including an address obtained by changing the received address to the secondary side when the test is completed.
The tunnel disaster prevention system according to claim 1, wherein the control unit of the fire detector transmits a test start signal including an address obtained by changing the value of the received address to the secondary side. .
2. The tunnel disaster prevention system according to claim 1, wherein the test start signal includes a test start pulse having a predetermined time width and an address having a predetermined bit length in which a predetermined time width shorter than the time width of the test start pulse is assigned to one bit. A tunnel disaster prevention system characterized by comprising pulses.
In a system in which multiple terminal slave units with no address set are connected to the signal line drawn from the master unit,
The master unit is provided with a control unit that transmits an address setting signal including a predetermined address to the signal line,
In each terminal slave connected to the signal line, when an address included in the address setting signal received from the primary side serving as the master is extracted and stored, an address setting signal including an address obtained by changing the received address is stored. A system comprising a control unit for transmitting to the secondary side.

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