JP2023065643A - disaster prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disaster prevention system that can easily and surely automatically set an address to a fire detector from the disaster prevention receiving board side.

SOLUTION: A plurality of fire detectors 14 are sequentially connected by a signal line 12 including a test start signal line 46, a test in progress signal line 40, and a fire signal line 38. One end of the signal line 12 is connected to a disaster prevention receiving board 10 to monitor a fire. When a test start signal including a prescribed address is received from the primary side of the test start signal line 46, the fire detector 14 transmits a test in progress signal whose address is set as its own address to the disaster prevention receiving board 10 by the test in progress signal line 40, and conducts a prescribed test on its own machine. When a fire is detected by the test, the fire detector transmits a fire detection signal with its own address to the disaster prevention receiving board 10 by the fire signal line 38. After the test ends, the transmission of test in progress signal is stopped, and the test start signal including the address whose address is changed is transmitted to the secondary side of the test start signal line 46.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to a disaster prevention system that monitors fire by connecting a fire detector to a disaster prevention monitoring panel.

2. Description of the Related Art Conventionally, emergency facilities are installed in tunnels such as motorways in order to protect people and vehicles from fire accidents that occur in tunnels.

As such emergency facilities, fire detectors, manual reporting devices, and emergency telephones are installed for monitoring and reporting fires. In order to protect against fire, water spraying equipment is installed to lower the temperature inside the tunnel by spraying water for fire extinguishing from the water spray head. We are constructing a tunnel disaster prevention system.

Tunnel disaster prevention systems, which consist 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 system connects fire detectors with addresses set to the signal line, and enables individual management in which detection is performed for each fire detector by transmission control.

In the P-type direct delivery system, fire detectors are divided into predetermined automatic reporting 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 receiving panel for each section for monitoring. Fire judgment by the P-type direct transmission type disaster prevention receiver panel 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 receiver panel temporarily restores the fire receiving circuit when a predetermined time has passed since the reception of the first pulse, and determines that a fire has occurred when a fire pulse signal is received again from the fire detector within a predetermined time after restoration. On the other hand, when the fire pulse signal is not received again within a predetermined time after restoration, it is treated as non-fire.

JP-A-2002-246962 JP-A-11-128381 JP 2006-099394 A JP 2006-146501 A JP-A-2002-197555 JP 2013-105370 A JP-A-6-325271

However, in such a conventional P-type direct tunnel disaster prevention system, fire detectors were monitored for each automatic notification section. A hardware configuration such as receiving circuits is required according to the number of devices, which increases the housing size of the disaster prevention receiving panel and increases the cost.

For example, in the case of a 2,400-meter tunnel, if the fire detector monitoring area is 25 meters on both sides, 96 fire detectors are required, and each automatic notification section is set to include two fire detectors. As a result, 48 sections are required, and correspondingly, receiving circuits for 48 inputs are required for the disaster prevention receiver panel, which increases the housing size and cost of the disaster prevention receiver panel.

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 the problem that the installation work is difficult and the installation cost is high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disaster prevention system capable of reducing costs without increasing the size of the housing of the disaster prevention receiving panel and the amount of wiring even if the number of automatic notification sections increases.

(Disaster prevention system)
The present invention is a disaster prevention system in which a plurality of slave units are sequentially connected by a signal line including a test start signal line and a test signal line, and one end of the signal line is connected to a master unit to monitor an abnormality,
When the child device receives a test start signal including a predetermined address from the primary side, which is the parent device side of the test start signal line, the child device transmits a test signal with the address set as its own address through the test signal line. A test start signal is transmitted to the base unit and a predetermined test is performed on the own unit. It is characterized by transmitting to the next side.

(basic effect)
The present invention is a disaster prevention system in which a plurality of slave units are sequentially connected by a signal line including a test start signal line and a test signal line, and one end of the signal line is connected to a master unit to monitor an abnormality, wherein the slave unit comprises: When a test start signal containing a predetermined address is received from the primary side, which is the parent device side of the test start signal line, the test signal set to the address of the own device is sent to the parent device through the test signal line. and perform a predetermined test on the self-device, and after the end of the test, stop the transmission of the test-in-progress signal and send a test start signal containing the changed address of the self-device to the secondary side of the test start signal line. Therefore, the test start signal with the address to be set is sent to the child device connected to the signal line, and the address is set according to the test, and the address is set for each child device. Therefore, it is possible to reduce the control load on the parent device side associated with address setting and automatically set the address to the child device easily and reliably.

In addition, if an abnormality is detected during operation, it will be sent as an abnormality detection signal with the address set by the test. It is possible to identify and notify the automatic notification section where the abnormality is detected from the address of the abnormality detection signal, and even with the P-type direct delivery system, it is possible to omit the trouble of confirming the slave unit which detected the abnormality on site as in the conventional case.

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 test start signal combining test start pulse and address pulse used in detector test Time chart showing signal waveform of each signal line in fire detector test Explanatory diagram showing management information indicating the correspondence between fire detector addresses and sections registered in the disaster prevention receiver. Flowchart showing the control operation of the fire detector

[Overview of Tunnel Disaster Prevention System]
FIG. 1 is a block diagram showing an outline of the functional configuration of the tunnel disaster prevention system. As shown in FIG. 1, a disaster prevention receiving panel 10 is installed in a monitoring center or the like in order to monitor abnormalities in the tunnel.

An inbound tunnel and a outbound tunnel are constructed for the tunnel of the motorway, and inside the tunnel, fire detectors 14 are installed at intervals of, for example, 25 meters along the walls in the longitudinal direction of the tunnel. The fire detector 14 sets monitoring areas on both sides of 25 meters on both sides, detects flames caused by fire, and transmits a fire detection signal to the disaster prevention receiving panel 10 . The fire detectors 14 installed at intervals of 25 meters in the tunnel form an automatic reporting section with two adjacent fire detectors 14 .

In the disaster prevention receiving panel 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 the four sections are grouped as one group. The system is divided into G1 to Gn, and signal lines 12 are pulled out from the disaster prevention receiving panel 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 receiving circuit units 18 provided in the disaster prevention receiving panel 10 need only be provided in the number corresponding to the number of the groups G1 to Gn. can be reduced to simplify the hardware, thereby reducing the housing size of the disaster prevention receiving panel 10, reducing the wiring amount of the signal line 12, and lowering the facility cost.

For example, in the case of a tunnel of 2,400 meters, 96 fire detectors 14 are installed at intervals of 25 meters, and the number of automatic notification sections is 48 sections because each fire detector is a unit of two. In this case, 48 receiver circuits 18 are required when the conventional receiving circuit units 18 are provided for each block. Therefore, the number of receiving circuit units 18 can be reduced to 12 units.

The number of fire detectors 14 connected to the same signal line 12 due to group division is not limited to the eight shown in the figure. It is possible to group eight or more units within the range of and further reduce the number of receiving circuit units 18 .

The disaster prevention receiving board 10 includes a control unit 16, which is 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. .

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

The control unit 16 of the disaster prevention receiving panel 10 automatically assigns unique addresses to the eight fire detectors 14 connected to each signal line 12 by performing a detector test for each signal line 12 after system installation. Control to set.

In addition, when the control unit 16 of the disaster prevention receiver 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 where the fire was detected is determined and controlled to notify.

The detector test by the control unit 16 of the disaster prevention receiver panel 10 is performed by sending 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. detector test control. Each fire detector 14 connected to the signal line 12 for detector test control of the disaster prevention receiver 10 starts a predetermined test operation when a test start signal is received from the primary side, which is the disaster prevention receiver 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 one 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 the address A is incremented by one, the eight fire detectors 14 autonomously send test start signals in order, and automatically set unique addresses.

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

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

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

The fire detectors 14-1 and 14-2 have a left eye light receiving part 30a and a right eye light receiving part 30b arranged side by side. is transmitted to the disaster prevention receiving board 10. In the following description, the fire detectors 14-1 and 14-2 will be referred to as fire detectors 14 when there is no need to distinguish between them.

(Configuration of fire detector)
As shown in FIG. 3, the fire detector 14-1 includes a control unit 50. The control unit 50 is a function realized by, for example, executing a program. using a computer circuit or the like 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. To the test transmission unit 52, the test signal line 40 and the test power lines 42 and 44 are connected in parallel, the test start signal line 46a on the primary side is input-connected, and the test start signal line 46b on the secondary side is connected. Output connected.

The left-eye fire detection unit 48a and the right-eye fire detection unit 48b monitor fires by, for example, two-wavelength flame detection. That is, the left-eye fire detection unit 48a and the right-eye fire detection unit 48b selectively transmit radiant energy of 4.4 to 4.5 μm, which is the resonant radiation band of CO2 peculiar to flames, through a narrow-band optical wavelength bandpass filter. (pass through), the radiation energy is detected by a light receiving sensor, photoelectrically converted, subjected to predetermined processing such as amplification, processed into a light reception signal corresponding to the energy amount, and the relative ratio of the light reception signal level is taken, The presence or absence of flame is determined by comparing with a predetermined threshold value.

The control unit 50 of the fire detector 14-1 instructs the fire transmission unit 54 to wait a predetermined period of 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 so that 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, is periodically transmitted to the fire signal line 38 at intervals.

In addition, the control unit 50 of the fire detector 14-1 controls the reversing voltage output to the test power supply lines 42 and 44 and the address A= When a test start signal including 1 is received via the test transmission unit 52, a predetermined test operation is performed on the right eye fire detection unit 48b and the left eye fire detection unit 48a, and control is performed to transmit a fire detection signal based on the test. conduct.

When receiving the test start signal, the control unit 50 of the fire detector 14 extracts the address A=1 included in the test start signal as its own address and stores it in the memory. Due to the address setting of -2, the received address A is incremented by 1 to address A = A + 1 = 2, and when the detector test is completed, the incremented address A = 2 is included in the test start signal and the secondary output to the side test start signal line 46b. The received address A may be changed to an address incremented by a plurality of values of 2 or more, instead of the address A being incremented by 1=A+1, or the address being incremented by multiplying it by a predetermined coefficient. It can be used as an address.

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

FIG. 4A shows the format of the test start signal 60. For example, a test start pulse 62 with a pulse width of 8 milliseconds is combined with an address pulse 64 of 22 milliseconds. A 22-bit length address combining 66 can be set.

4B to 4I 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 is shown. The test start signals 60-1 to 60-8 have a fixed test start pulse 62 at the head, followed by 1000 . . . 0, 0100 . 000 . . . 0 is combined with the address pulse.

(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 conducting a detector test, as shown in FIGS. 5A and 5B, the disaster prevention receiver panel 10 performs polarity reversal control to alternately switch the polarities of the test voltages for the test power lines 42 and 44 at predetermined time intervals. , the test of the right eye fire detection part 48b of the fire detector 14 can be performed by reversing the polarity of the test power supply line 42 to positive.

At time t1, when the fire detector 14-1 receives the test start signal 60-1 shown in FIG. The right eye fire detection part 48b 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 sent to the disaster prevention receiver 10 as shown in FIG. 5 (G). It is transmitted by the signal line 38 .

Subsequently, the test of the left eye fire detection part 48a of the fire detector 14 is performed in synchronization with the reversal of the test power supply line 42 to positive, and if the test is performed normally, as shown in FIG. A fire pulse signal from the test is transmitted to the disaster prevention receiving panel 10 through the fire signal line 38 . Further, during the detector test, as shown in FIG. 5(F), a test signal is output to the test signal line 40, and other fire detectors including the disaster prevention receiver 10 and the fire detector 14-2 Recognize that you are in a detector test.

The fire detector 14-1 extracts the address A=1 from the received test start signal 60-1, stores it in memory as its own address, and increases 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 sends the test start signal line 46b on the secondary side to the test start signal line 46b on the secondary side at the timing of time t3 when the test power line 42 becomes positive when the detector test is finished. A test start signal 60-2 is transmitted by combining the pulse 62 with an address pulse 64 of address A=2.

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 starts the fire detector 14-1. Detector test as in case. Also, the fire detector 14-2 extracts the address A=2 from the received test start signal 60-2, stores it in the memory as its own address, and increments it by one as the address to be set in the next fire detector 14-3. address A=3 is generated.

Subsequently, the fire detector 14-2 sends the test start signal line 46c on the secondary side to the test start signal line 46c on the secondary side at the timing of time t5 when the test power line 42 becomes positive when the detector test ends. A test start signal 60-3 is transmitted by combining the pulse 62 with an address pulse 64 of address A=3.

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

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

In the memory provided in the control unit 16 of the disaster prevention receiving panel 10 shown in FIG. is stored and registered in advance.

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

By registering such management information in the disaster prevention receiver 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 determined. Acquisition and display of the automatic notification section where the fire is detected on the display of the display part 22, and the automatic notification section where the fire is detected can be known and appropriate and prompt action can be taken without the need to go into the tunnel and check the site. enable

(Control operation of fire detector)
FIG. 7 is a flow chart showing the control operation of the fire detector. As shown in FIG. 7, the control unit 50 of the fire detector 14 responds to the polarity reversal control by the detector test of the disaster prevention receiver panel 10 in step S1. Proceeding to S2, when the reception of the test start signal from the primary side is detected in step S2, the process advances to step S3 to extract the address A included in the test start signal and store it in the memory as its own address. 1 is added to the received address A to set the address of the fire detector, so that A=A+1.

Subsequently, in step S5, a test-in-progress signal is transmitted to the test-in-progress signal line 40 to test the right-eye fire detection unit 48b side, and if flame detection is determined by the test, a fire detection signal is sent to the disaster prevention receiving panel 10.

Subsequently, in step S6, when a reversal of polarity to make the test power supply line 44 positive is detected, the process advances to step S7 to test the left eye fire detection unit 48a side. Send to 10.

Subsequently, in step S8, when a reversal of the test power supply line 42 side is detected to be positive again, it is determined that the detector test is completed, the output of the test signal is stopped in step S9, 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 test start signal line on the secondary side.

When the automatic setting of the address by the detector test is completed, the process proceeds to step S11 and becomes a monitoring state of fire detection. Generate a fire detection signal and periodically transmit the fire detection signal.

[Modification of the present invention]
(System that automatically assigns addresses to terminal slaves)
The point of automatically assigning addresses to 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 no address is assigned to the signal line drawn from a general appropriate base unit. It can be applied to a system in which multiple terminal slave units with settings are connected.

In such a system, the parent unit is provided with a control section for transmitting an address setting signal including a predetermined address to the signal line, and each terminal slave unit connected to the signal line is provided with a primary terminal serving as the parent unit side. A control unit is provided that, when the address included in the address setting signal received from the secondary side is extracted and stored, transmits to the secondary side an address setting signal including the address obtained by changing the received address.

By providing such a system configuration, when the master unit transmits an address setting signal including the top address to the terminal slave unit connected to the head of the signal line to set the address, thereafter the address setting is performed. The terminal slave unit that has completed the self-set address is sent to the next terminal slave unit, for example, an address setting signal containing the address incremented by one, and the address setting is performed autonomously one after another. Since there is no need to perform communication control to set addresses individually for each device, it is possible to reduce the control burden on the base device side associated with address setting and automatically set a unique address for each device easily and reliably. and

(detector test)
The test of the fire detector by the disaster prevention receiver shown in the above embodiment is an example. If the detector test is performed, the address is extracted and stored as the self address, and the test start signal including the changed address is sent to the secondary side at the end of the test, polarity reversal control of the test power supply, It can be applied to appropriate detector test control without being restricted by the output of the during-test signal or the like.

(others)
Moreover, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Disaster prevention receiver 12: Signal lines 14, 14-1, 14-2: Fire detectors 16, 50: Control unit 18: Receiving 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 lines 42, 44: test power 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 transmitter 60: test start signal 62: test start pulse 64: address pulse 66: 1-bit pulse

Claims (1)

A disaster prevention system that sequentially connects a plurality of slave units by a signal line including a test start signal line and a test signal line, and connects one end of the signal line to a master unit to monitor an abnormality,
When the slave device receives a test start signal including a predetermined address from the primary side of the test start signal line, which is the parent device side, the slave device sets the address as its own address, and A signal under test with an address is transmitted to the master unit through the signal line under test, a predetermined test is performed on the own unit, and after completion of the test, transmission of the under test signal is stopped and the A disaster prevention system characterized by transmitting a test start signal including the changed address to the secondary side of the test start signal line.

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