JP7075524B2 - Tunnel disaster prevention system - Google Patents

Description

The present invention relates to a tunnel disaster prevention system in which a terminal device such as a fire detector installed in a tunnel is connected to a disaster prevention receiving panel to monitor an abnormality in the tunnel.

Conventionally, emergency facilities have been installed in tunnels such as motorways to protect people and vehicles from fire accidents that occur in the tunnels.

Such emergency facilities are equipped with a fire detector, a manual notification device, an emergency telephone for fire monitoring and notification, a fire hydrant device for extinguishing a fire and preventing the spread of fire, and a tunnel frame. In order to protect from fire, water spray equipment that sprinkles fire extinguishing water from the water spray head is installed, and by installing a disaster prevention receiver that monitors and controls the terminal equipment of these emergency facilities, a tunnel disaster prevention system is constructed. There is.

The tunnel disaster prevention system consisting of a disaster prevention receiver and terminal equipment is roughly divided into an R-type transmission system and a P-type direct transmission system. The R-type transmission method connects a terminal device such as a fire detector whose address is set to a transmission line, and enables individual management in which detection and control are performed for each terminal device by transmission control. In the P-type direct delivery method, a plurality of terminal devices belonging to the same section are connected to a signal line drawn out in a predetermined section unit according to the type of the terminal device, and detection and control are performed in the signal line unit.

FIG. 8 is an explanatory diagram showing the line connection of the terminal device to the disaster prevention receiving panel by the conventional P-type direct delivery method. As shown in FIG. 8, in the tunnel 201, fire detectors 16 are installed along the longitudinal direction of the tunnel at the boundary of a monitoring area divided into, for example, 25 m intervals or 50 m intervals, and the fire detectors 16 are installed in both left and right directions. It has a detection area in the same area, and fires in the same monitoring area are monitored in duplicate by fire detectors 16 arranged adjacent to each other.

Further, in the tunnel 201, fire hydrant devices are installed along the longitudinal direction of the tunnel, for example, at intervals of 50 m, and the fire hydrant device is provided with a manual notification device 20 known as a transmitter, and a fire hydrant with a fire hydrant valve open / close lever. A fire hydrant switch 22 is provided in which a fire hydrant valve open / close switch that is turned on by opening the valve and a pump start switch operated by the fire brigade are connected in parallel.

Further, in the tunnel 201, automatic valve devices for water spraying equipment that spray water in the form of mist from the water spray head to protect the tunnel frame from heat caused by a fire are installed along the longitudinal direction of the tunnel, for example, at intervals of 50 m. The automatic valve device is provided with a water spray switch 24 for detecting the start of water spray by the remote operation of the automatic valve.

The disaster prevention receiving board 200 is provided with partition boards 202-1 and 202-2 having a predetermined length in the tunnel, for example, 800 meters as one section. The fire detector 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 installed in the section from 0 to 800 meters from the tunnel entrance are signal lines drawn from the partition board 202-1 in a bundled manner. It is connected to each signal line of the group 204-1, 206-1, 208-1, 100-1 on a device-by-device basis.

Further, the fire detector 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 installed in the section of 800 to 1600 meters from the tunnel entrance were pulled out from the partition board 202-2 in a bundled manner. It is connected to each signal line of the signal line group 204-2, 206-2, 208-2, 210-2 for each device.

Japanese Unexamined Patent Publication No. 2002-246962 Japanese Unexamined Patent Publication No. 11-128381

However, in such a conventional tunnel disaster prevention system in which a plurality of partition boards are provided with a predetermined length as one section, the partition boards fail due to deterioration or the like during long-term operation. If this is the case, there is a problem that it becomes impossible to monitor all the terminal devices installed in the section in the tunnel corresponding to the failed partition board.

In addition, in case of a failure of the partition board, it is necessary to replace the failed circuit board with a spare partition board, but the spare partition board prepared for the failure response does not operate normally due to aging or the like. In some cases, it takes time and effort to replace the failed circuit board, and during that time, there is a problem that it becomes impossible to monitor all the terminal devices installed in the section in the tunnel corresponding to the failed partition board.

In order to solve such a problem, the partition boards may be duplicated and switched to a spare partition board if the partition board fails during operation. However, as the tunnel becomes longer, the number of partition boards increases. However, if the partition board is duplicated, the installation space and cost will increase significantly, which is not a realistic solution.

Further, in the conventional partition board, a line receiving unit is provided for each signal line from the terminal device, and a fire detector, a manual notification device, a fire extinguisher switch, and water are provided at intervals of 50 meters in one section of 800 meters. If a spray switch is provided, a large number of circuits such as 100 circuits are required as the line receiving unit, the circuit scale of the partition board becomes large and the cost increases, and the number of circuits in the line receiving unit is large, resulting in a failure. There is a problem that the frequency of occurrence is also high.

The present invention prevents the monitoring function of the terminal device from being lost in the event of a failure of a plurality of partition boards provided corresponding to a section having a predetermined length in the tunnel, and at most a partition has a large number of lines from the terminal device. It is an object of the present invention to provide a tunnel disaster prevention system that makes it possible to reduce the circuit scale of a board.

(Tunnel disaster prevention system)
The present invention is a tunnel disaster prevention system in which a plurality of terminal devices are connected to a disaster prevention receiving panel via a plurality of lines, and signals from the terminal devices are received and controlled on a line-by-line basis.
A first line scanning unit that selects and outputs signals input from multiple terminal devices belonging to one group when a plurality of terminal devices are divided into two groups by switching scanning, and
A second line scanning unit that selects and outputs signals input from a plurality of terminal devices belonging to the other group of the two groups by switching scanning, and
A first line receiving unit that receives a signal selected by switching scanning of the first line scanning unit and instructs predetermined control, and a first line receiving unit.
A second line receiving unit that receives a signal selected by switching scanning of the second line scanning unit and instructs predetermined control, and a second line receiving unit.
When a predetermined signal is received by the first line receiving unit by the output from the first line scanning unit, the output of the first line scanning unit is switched to the second line receiving unit, and the same predetermined signal as the first line receiving unit is used. When a signal is received by the second line receiver, a control based on the received predetermined signal is instructed, and a predetermined signal is received by the second line receiver by the output from the second line scanning unit. In addition, when the output of the second line scanning unit is switched to the first line receiving unit and the same predetermined signal as the second line receiving unit is received by the first line receiving unit, control based on the received predetermined signal is performed. The line switching control unit that instructs
It is characterized by being equipped with.

(Line scanning unit with main scanning circuit and sub scanning circuit)
The first line scanning unit is
A first main scanning circuit in which signals from a plurality of terminal devices belonging to one group are input in parallel, and signals input in parallel are selected and output by switching scanning, and
A first sub-scanning circuit in which signals input in parallel to the first main scanning circuit are branched and input in parallel, and signals input in parallel are sequentially and repeatedly selected and output.
Equipped with
The second line scanning unit is
A second main scanning circuit in which signals from a plurality of terminal devices belonging to the other group are input in parallel, and signals input in parallel are selected and output by switching scanning, and
A second sub-scanning circuit in which signals input in parallel to the second main scanning circuit are branched and input in parallel, and signals to be input in parallel are selected and output by switching scanning, and
Equipped with
The line switching control unit
When a predetermined signal is received by the first line receiving unit by the output from the first main scanning circuit, the output of the first sub scanning circuit is switched to the second line receiving unit, and the same predetermined signal as the first line receiving unit is used. When the signal is received by the second line receiver, the control based on the received predetermined signal is instructed, and the predetermined signal is received by the second line receiver by the output from the second main scanning circuit. In addition, when the output of the second sub-scanning circuit is switched to the first line receiving unit and the same predetermined signal as the second line receiving unit is received by the first line receiving unit, control based on the received predetermined signal is performed. To instruct.

(AND judgment of fire detection signal)
The first line receiving unit and the second line receiving unit instruct predetermined fire alarm control when the fire reception signal of the fire detector by the same signal line is received by both of them.

(Basic effect)
The present invention connects a terminal device installed in a tunnel to a line drawn from a disaster prevention receiving panel, and receives and controls a signal from the terminal device or a block including a plurality of terminal devices on a line-by-line basis. In the system, when a plurality of terminal devices are divided into two groups, a first line scanning unit that selects and outputs a signal input from a plurality of terminal devices belonging to one group by switching scanning and the other of the two groups. A second line scanning unit that selects and outputs signals input from a plurality of terminal devices belonging to the above group by switching scanning and a signal selected by switching scanning of the first line scanning unit are received and a predetermined control is instructed. If the first line receiving unit, the second line receiving unit that receives the signal selected by the switching scanning of the second line scanning unit, and instructs predetermined control, and the first line receiving unit fail, the first line is received. When the output of the 1-line scanning unit is switched to the 2nd line receiving unit, the 2nd line scanning unit and the 1st line scanning unit are sequentially switched and scanned to output, and if the 2nd line receiving unit fails, the second line receiving unit fails. Since the line switching control unit is provided to control the output of the line scanning unit by sequentially switching and scanning the first line scanning unit and the second line scanning unit in a state where the output of the line scanning unit is switched to the first line receiving unit. If either the first line receiving unit or the second line receiving unit provided on the board, for example, the first line receiving unit fails, the output of the first line scanning unit is switched to the second line receiving unit. Following the selective output of the line signal to the second line receiving unit by the second line scanning unit, the first line scanning unit on the failed partition board image side receives the normal second line signal from the terminal device on the failed side. Time to selectively scan signals from a plurality of terminal devices by repeating the selective output of the second line scanning unit to the normal second line receiving unit and the subsequent selective output of the first line scanning unit. However, the monitoring function of the terminal equipment is not lost, and high redundancy in the monitoring of the terminal equipment can be obtained against the failure of the partition board.

Further, since the selective output of the line scanning unit is sequentially input to the first line receiving unit and the second line receiving unit provided for each partition board, the first line receiving unit and the second line receiving unit are sequentially input to the partition board. It is only necessary to provide one corresponding circuit, the circuit scale of the partition board is significantly reduced, the cost and the frequency of failures are reduced, and high reliability can be ensured.

(Effect of line scanning unit equipped with scanning circuit)
Further, the first line scanning unit includes a first scanning circuit in which signals from a plurality of terminal devices belonging to one group are input in parallel, and signals input in parallel are selected and output by switching scanning. The two-line scanning unit includes a second scanning circuit in which signals from a plurality of terminal devices belonging to the other group are input in parallel, and signals input in parallel are selected and output by switching scanning, and the line switching control unit is provided. Is to output the signal selected by the switching scan of the first scanning circuit to the first line receiving unit and by the switching scanning of the second scanning circuit when the first line receiving unit and the second line receiving unit are normal. The selected signal is output to the second line receiving unit, and if the first line receiving unit fails, the selected signal is output to the second line receiving unit by switching scanning of the second scanning circuit, and then the first line is output. The signal selected by the switching scan of the scanning circuit is output to the second line receiving unit, and if the second line receiving unit fails, the signal selected by the switching scanning of the first scanning circuit is output to the first line receiving unit. Since the signal selected by the selective scanning of the second scanning circuit is output to the first line receiving unit after the output, either the first line receiving unit or the second line receiving unit provided on the partition board is output. For example, if the first line receiving unit fails, the output of the first scanning circuit is switched to the second line receiving unit, and the failure occurs following the selective output of the line signal to the second line receiving unit by the second scanning circuit. The line signal from the terminal device on the failed side is selectively output to the normal second line receiver by the first scanning circuit on the partition board image side, and the monitoring function of the terminal device is not lost due to the failure of the partitioned board. , High redundancy in monitoring terminal equipment can be obtained.

(Effect of line scanning unit with main scanning circuit and sub scanning circuit)
Further, the first line scanning unit includes a first main scanning circuit in which signals from a plurality of terminal devices belonging to one group are input in parallel, and signals input in parallel are sequentially and repeatedly selected and output. The signal input in parallel to the main scanning circuit is branched and input in parallel, and the first sub-scanning circuit that repeatedly selects and outputs the signals input in parallel is provided, and the second line scanning unit is the other. Signals from multiple terminal devices belonging to the group are input in parallel, and the second main scanning circuit that repeatedly selects and outputs the signals that are input in parallel and the signal that is input in parallel to the second main scanning circuit are branched. A second sub-scanning circuit that repeatedly selects and outputs signals that are input in parallel and input in parallel is provided, and the line switching control unit is used when the first line receiving unit and the second line receiving unit are normal. Outputs the signal selected by the first main scanning circuit to the first line receiving unit and outputs the signal selected by the second main scanning circuit to the second line receiving unit, so that the first line receiving unit outputs the signal selected by the first main scanning circuit. In the event of a failure, the signal selected by the second main scanning circuit is output to the second line receiving unit, and then the signal selected by the first sub scanning circuit is output to the second line receiving unit to receive the second line. When a unit fails, the signal selected by the second sub-scanning circuit is output to the first line receiving unit after being output to the first line receiving unit selected by the first main scanning circuit. In addition to the effect that the monitoring function of the terminal device is not lost against the failure of the first line receiving unit or the second line receiving unit provided on the board, for example, the failure of the first main scanning circuit of the first line scanning unit. When the signal from the terminal device cannot be normally obtained from the first line scanning unit, the output of the first sub scanning circuit is switched to the second line receiving unit, and the second line reception by the second main scanning circuit is performed. Following the selective output of the line signal to the unit, the signal from the terminal device input to the failed first main scanning circuit is selectively output to the normal second line receiving unit by scanning the first sub-scanning circuit, and a plurality of signals are selected and output. Although the time for selectively scanning the signal from the terminal device is increased, the monitoring function of the terminal device is not lost, and high redundancy in monitoring the terminal device can be obtained even if the line switching unit fails.

(Effect of AND judgment of terminal signal)
Further, the line switching control unit switches the output of the first line scanning unit to the second line receiving unit when a predetermined signal is received by the first line receiving unit by the output from the first line scanning unit. When the same predetermined signal as that of the 1-line receiving unit is received by the 2nd line receiving unit, the control based on the received predetermined signal is instructed, so that the line signal from the line which is the 1st line receiving unit is instructed. Is received, it is possible to confirm that the line signal is obtained from the same line in the second line receiving unit and instruct the control corresponding to the line signal, and prevent malfunction due to the reception of the line signal. Can improve reliability.

Regarding the AND determination of the terminal signal, the first line scanning unit and the second line scanning unit may be interchanged. That is, the line switching control unit switches the output of the second line scanning unit to the first line receiving unit when a predetermined signal is received by the second line receiving unit by the output from the second line scanning unit. When the same predetermined signal as the two-line receiver is received by the first line receiver, the control based on the received predetermined signal is instructed, so that the line signal from the line which is the second line receiver is instructed. Is received, it is possible to confirm that the line signal is obtained from the same line at the first line receiving unit and instruct the control corresponding to the line signal, and prevent malfunction due to the reception of the line signal. Can increase reliability.

(Effect of AND judgment by switching between main scanning circuit and sub scanning circuit)
Further, the line switching control unit switches the output of the first sub-scanning circuit to the second line receiving unit when a predetermined signal is received by the first line receiving unit by the output from the first main scanning circuit. When the same predetermined signal as the 1-line receiver is received by the 2nd line receiver, the control based on the received predetermined signal is instructed, so that the output of the 1st main scanning circuit receives the 1st line. When a line signal from a line that is a unit is received, the output of the first sub-scanning circuit is switched to the second line receiver, and it is confirmed that the line signal can be obtained from the same line, and the line signal is supported. It is possible to instruct the controlled control, prevent malfunction due to reception of a line signal, and improve reliability.

Regarding the AND determination by switching between the main scanning circuit and the sub scanning circuit, the first line scanning unit and the second line scanning unit may be interchanged. That is, the line switching control unit switches the output of the second sub-scanning circuit to the first line receiving unit when a predetermined signal is received by the second line receiving unit by the output from the second main scanning circuit. When the same predetermined signal as the two-line receiver is received by the first line receiver, the control based on the received predetermined signal is instructed, so that the second line is received by the output of the second main scanning circuit. When a line signal from a line that is a unit is received, the output of the second sub-scanning circuit is switched to the first line receiver, and it is confirmed that the line signal can be obtained from the same line, and the line signal is supported. Control can be instructed, malfunctions due to reception of line signals can be prevented, and reliability can be improved.

(AND judgment of fire detection signal)
Further, the line switching control unit is configured to instruct a predetermined fire alarm control when the fire reception signal of the fire detector by the same signal line is received by the first line receiving unit and the second line receiving unit. In response to the reception of the fire detection signal from the fire detector, the tunnel traffic is blocked to deal with the fire, so the tunnel traffic is blocked due to the false report of the fire detector and it takes time to recover, socially and economically. However, when the fire detection signal from the fire detector is received by both the first line receiver and the second line receiver, control corresponding to the fire detection is performed, and a fire due to an erroneous report is performed. It is possible to reduce the reception of detection signals and improve the reliability of fire monitoring.

(Effects depending on the type of terminal device)
In addition, since the terminal equipment is at least one of a fire detector, a manual notification device, a fire extinguisher switch, or a water spray switch installed at predetermined intervals in the longitudinal direction of the tunnel, the fire detector, manual notification device, etc. installed in the tunnel. Terminal equipment including a fire extinguisher switch or a water spray switch is divided into two groups, for example, by dividing them into predetermined lengths in a tunnel, and fire detectors are placed in the first line scanning section and the second line scanning section in line units, and other than that. The terminal devices are connected in parallel by a signal line in units of a predetermined number of blocks. For example, even if the first line receiving unit to which the output of the first line scanning unit is input fails, the output of the first line scanning unit is the first. Since it can be switched to the input of the 2-line receiver, even if the partition board provided with the first line receiver or the partition board provided with the second line receiver fails, the fire detector, manual notification device, fire extinguisher switch or water The monitoring function of the spray switch is not lost, and high redundancy and reliability are ensured.

Explanatory diagram showing the outline of the tunnel disaster prevention system Block diagram showing the board configuration of the disaster prevention receiver along with the terminal line connection Block diagram showing the outline of the functional configuration of the tunnel disaster prevention system A block diagram showing an embodiment of the line receiving unit and the line switching unit shown in FIG. A block diagram showing another embodiment of the line receiving unit and the line switching unit shown in FIG. A block diagram showing line reception control when the first line receiving unit of FIG. 5 fails. A block diagram showing line reception control when the second line receiving unit of FIG. 5 fails. Explanatory diagram showing the line connection of the terminal device to the disaster prevention receiver by the conventional P-type direct delivery method.

[Overview of tunnel disaster prevention system]
FIG. 1 is an explanatory diagram showing an outline of a tunnel disaster prevention system. As shown in FIG. 1, an up line tunnel 1a and a down line tunnel 1b are constructed as a tunnel for a motorway, and the up line tunnel 1a and the down line tunnel 1b are connected by an evacuation connecting pit 2.

Inside the up line tunnel 1a and the down line tunnel 1b, fire detectors 16 that function as terminal devices are installed along the wall surface in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. The fire detector 16 sets monitoring areas on both sides of 50 meters on the left and right, detects a flame caused by a fire, and issues a fire.

Further, inside the up line tunnel 1a and the down line tunnel 1b, a fire hydrant device 18 and an automatic valve device 23 are installed along the wall surface of the observer passage in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. The fire hydrant device 18 is provided with a manual notification device 20 and a fire hydrant switch 22 that function as terminal devices.

The fire hydrant device 18 has a hose with a nozzle housed in the fire hydrant door. In the event of a fire, the fire hydrant door is opened to pull out the hose with a nozzle, and when the fire hydrant valve open / close lever is opened, fire hydrant water is discharged and the fire hydrant valve open / close detection is detected. The switch turns on and outputs a pump start signal to start the fire extinguishing pump.

Further, the fire hydrant device 18 is provided with a fire extinguisher door, and the fire extinguisher is housed in the fire extinguisher door. Further, the fire hydrant device 18 is provided with a water tap used by the fire brigade, and is provided with a pump start switch that outputs a pump start signal when operated by a fire brigade member. The fire hydrant valve open / close detection switch and the pump start switch are connected in parallel, and this functions as the illustrated fire hydrant switch 22.

Further, the fire hydrant device 18 is provided with a notification device door, and the notification device door is provided with a manual notification device 20 functioning as a transmitter. When the manual notification device 20 is operated, a fire notification signal is output to the disaster prevention receiving panel 10, and the response lamp is turned on by the response signal from the disaster prevention receiving panel 10.

Further, inside the up line tunnel 1a and the down line tunnel 1b, an automatic valve device 23 of a water spray facility is installed along the wall surface of the observer passage in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. 23 opens and drives the main valve by remote opening control of the electric valve for operation, and discharges fire extinguishing water from a plurality of water spray heads installed in the longitudinal direction at the upper part of the tunnel wall surface to protect the tunnel frame from fire. The automatic valve device 23 of the water spraying equipment is provided with a water spray switch 24 as a terminal device for detecting the start of water spraying from the water spray head. As the water spray switch 24, a pressure switch that detects and turns on the water discharge pressure due to the opening operation of the automatic valve is used.

A disaster prevention receiver 10 is installed in a monitoring center or the like in order to connect terminal devices such as a fire detector 16, a manual notification device 20, a fire hydrant switch 22, and a water spray switch 24 installed in the tunnel to monitor abnormalities in the tunnel. Is installed.

From the disaster prevention receiver panel 10, P-type signal line groups 11 and 12 are pulled out from the up line tunnel 1a and the down line tunnel 1b, and the fire detector 16, the manual notification device 20, and the fire hydrant switch installed in the tunnel. 22 and the water spray switch 24 are connected.

In the present embodiment, the inside of the tunnel is divided into, for example, two groups with a predetermined length, for example, 800 meters as one section, and signal lines individually drawn are connected to the fire detector 16 of each group. For the other manual notification device 20, the fire hydrant switch 22, and the water spray switch 24, one section of 800 meters is divided into block sections of a predetermined length, for example, 200 meters, and connected to a signal line drawn out in block section units. ing. In the following description, a case where the tunnel length is set to 1600 meters and divided into two sections will be described as an example.

Here, the P-type signal line is composed of a signal line and a common line, and the fire detector 16, the manual notification device 20, the fire extinguishing plug switch 22, and the water spray switch 24 pass a line current based on their respective operations. A fire detection signal, a fire notification signal, a pump start signal, and a water spray start signal are sent to the disaster prevention receiver 10.

Other emergency facilities for the tunnel include fire extinguishing pump equipment 25, ventilation equipment 28, alarm display board equipment 30, radio rebroadcasting equipment 32, TV monitoring equipment 34 and lighting equipment 36, IG slave station equipment 38, and the like. Except for the point that the IG slave station equipment 38 is connected by a data transmission line, the other equipment is individually connected to the disaster prevention receiving panel 10 by the P-type signal line group 14.

Here, the IG slave station equipment 38 is a communication equipment that connects the disaster prevention receiving panel 10 and the remote management equipment 42 via the network 40. The ventilation equipment 28 is equipment that gives energy to the air in the tunnel by the high blowing wind speed operated by the jet fan installed on the ceiling side in the tunnel to generate a ventilation flow in the longitudinal direction of the tunnel.

Further, the alarm display board equipment 30 is a facility for notifying the user in the tunnel of the occurrence of a fire in the tunnel, the start of water spraying, etc. by displaying it on the lightning display board. The radio rebroadcasting facility 32 is a facility for allowing a driver or the like to receive information from a road administrator in a tunnel. The TV monitoring equipment 34 is a facility for confirming the scale and position of a fire, operating a water spraying facility, and grasping the situation in a tunnel when evacuation guidance is performed. The lighting equipment 36 is equipment that drives and manages the lighting equipment in the tunnel.

[Board configuration of disaster prevention receiver]
FIG. 2 is a block diagram showing the board configuration of the disaster prevention receiver board together with the terminal line connection. As shown in FIG. 2, the disaster prevention receiving panel 10 is provided with a control rack 46 and a compartment rack 52. The control rack 46 is provided with a control CPU board 48 and a control CPU spare board 50, and the control CPU board is duplicated.

The partition CPU 52 is provided with a partition CPU board 54 and a partition CPU spare board 56, and the partition CPU board is also duplicated. Further, the partition rack 52 is provided with partition boards 60-1 and 60-2 corresponding to the terminal equipment in the two sections of 800 meters of the up line tunnel 1a, and the two sections of 800 meters of the down line tunnel 1b. Two partition boards 60-3 and 60-4 are provided corresponding to the terminal equipment of the above.

A line switching board 64-1 is provided for the partition boards 60-1 and 60-2, and the terminal equipment installed in the uplink tunnel 1a is connected to the line switching board 64-1 by the signal line group 11. There is.

Further, a line switching board 64-2 is provided for the partition boards 60-3 and 60-4, and the terminal equipment installed in the downlink tunnel 1b is connected to the line switching board 64-2 by the signal line group 12. Has been done. Further, the partition rack 52 is provided with a P-type output board 62.

The duplicated partition CPU board 54 and the partitioned CPU spare board 56 are connected to the duplicated control CPU board 48 and the control CPU spare board 50 via serial transmission lines 76 and 78 such as the duplicated RS-485. .. Further, the duplicated partition CPU board 54 and the partition CPU spare board 56 are connected to the partition boards 60-1 to 60-4 and the P-type output board 62 via a signal line. The P-type output board 62 is connected to the external fire extinguishing pump equipment 25, ventilation equipment 28, alarm display board equipment 30, radio rebroadcasting equipment 32, TV monitoring equipment 34, and lighting equipment 36 shown in FIG.

From the line switching board 64-1, P-type signal line groups 80-1, 82-1, 84-1 and 86-1 are pulled out from the upstream tunnel 1a, and the fire detector 16 is connected to each line. The manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 are connected in block units.

Here, since the fire detector 16 is divided into 16 units in one section of 800 meters and the other terminal devices are divided into 4 blocks of 200 meters, the signal line groups 80-1 and 80-2 are respectively. The 16 lines and the signal line groups 82-1 to 86-2 each have 4 lines, and the signal line group 11 bundles 56 lines.

From the line switching board 64-2, P-type signal line groups 80-3, 82-3, 84-3, 86-3 (56 lines in total) are pulled out from the downlink tunnel 1b, and the fire detector 16 Is connected in line units, and the manual notification device 20, the fire hydrant switch 22 and the water spray switch 24 are connected in block units.

The partition rack 52 is provided with a detector test board that sends a test signal to the fire detector 16 by a test signal line that is a crossover wiring, but the illustration is omitted.

Further, the disaster prevention receiving board 10 is provided with an operation display CPU board 65, to which an operation unit 66 having a touch panel and various operation switches and an acoustic unit 68 having a speaker are connected, and via the display control board 70. A display unit 72 equipped with a liquid crystal display and various indicator lights is connected. Further, the disaster prevention receiving board 10 is provided with a serial CPU board 74, and the IG slave station equipment 38 shown in FIG. 1 is connected to the serial CPU board 74.

[Functional configuration of disaster prevention receiver]
FIG. 3 is a block diagram showing an outline of the functional configuration of the tunnel disaster prevention system. As shown in FIG. 3, the disaster prevention receiving panel 10 is provided with a main control unit 90, and the main control unit 90 is a function realized by executing a program, for example, and the hardware is the control CPU board 48 of FIG. A computer circuit or the like equipped with a provided CPU, memory, various input / output ports, etc. is used.

When the main control unit 90 receives a fire detection signal from the fire detector 16 or a fire notification signal from the manual notification device 20, the main control unit 90 performs predetermined fire alarm control and receives a pump start signal from the fire hydrant switch 22. Controls the start of the fire extinguishing pump equipment 25, and further controls the alarm display board equipment 30 to display a warning indicating that tunnel intrusion is prohibited when the water spray starts when the water spray start signal from the water spray switch 24 is received. Let me.

A partition control unit 96 is provided for the main control unit 90, and the partition control unit 96 is a function realized by, for example, executing a program. As hardware, the CPU provided on the partition CPU board 54 in FIG. 2 A computer circuit or the like equipped with a memory, various input / output ports, etc. is used.

When the partition control unit 96 receives a line signal from a terminal device installed in a tunnel, the partition control unit 96 sends a line number specifying the type of the line signal and the received signal line to the main control unit 90 to perform predetermined control. ..

The main control unit 90 is provided with the function of the sub control unit corresponding to the control CPU spare board 50 in FIG. 2, but the illustration is omitted.

For the section control unit 96, two sets of lines corresponding to each of the two groups of fire detectors 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 divided into 800-meter sections of the up line tunnel 1a. Receiving units 102-1, 102-2, 104-1, 104-2, 106-1, 106-2, 108-1, 108-2 are provided.

The line receiving units 102-1 to 108-2 receive signals output from the fire detector 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 provided as terminal devices in line units and receive signals. Is output to the compartment control unit 96, and this received signal is sent from the compartment control unit 96 to the main control unit 90 to perform fire alarm control, pump start control, water spray alarm display control, and the like.

Further, for the section control unit 96, two sets of line receiving units 102-3, 102 corresponding to each of the fire detector 16, the manual notification device 20, the fire hydrant switch 22 and the water spray switch 24 of the down line tunnel 1b. -4, 104-3, 104-4, 106-3, 106-4, 108-3, 108-4 are provided.

In the following description, the line receiving unit 102-1, 104-1, 106-1, 108-1, 102-3, 104-3, 106-3, 108-3 are used as the first line receiving unit, and the line receiving unit is used. 102-2, 104-2, 106-2, 108-2, 102-4, 104-4, 106-4, 108-4 are used as the second line receiving unit.

The partition control unit 96 is provided with the function of the sub-partition control unit corresponding to the partition CPU spare board 56 in FIG. 2, but the illustration is omitted.

The line switching units 100-1 to 100-8 input and connect the signal lines from the terminal devices in parallel, and repeat the operation of switching and scanning the line signals from the input lines in a predetermined order and selectively outputting them. There is. For example, the line switching unit 100-1 sequentially selects 16 line line signals from the fire detector 16 by the signal line group 80-1 by switching scanning and inputs them to the first line receiving unit 102-1. The line signals of 16 lines from the fire detector 16 by the signal line group 80-2 are sequentially selected by switching scanning and input to the second line receiving unit 102-2.

If the first line receiving unit 102-1 fails, the line signals of 36 lines of the signal line groups 80-1 and 80-2 are sequentially selected and input to the normal second line receiving unit 102-2. Switch the line to recover from the failure. Further, when the second line receiving unit 102-2 fails, the line signals of 36 lines of the signal line groups 80-1 and 80-2 are sequentially selected for the normal first line receiving unit 102-1. Input and switch the line to recover from the failure.

The details of the line switching when the first line receiving unit 102-1 or the second line receiving unit 102-2 fails will be clarified later.

The main control unit 90 is provided with an acoustic unit 68, an operation unit 66, a display unit 72, a serial transmission unit 92, and a P-type output unit 94. Of these, the serial CPU board 74 of FIG. 2 is used for the serial transmission unit 92, and the P-type output board 62 of FIG. 2 is used for the P-type output unit 94.

[Countermeasures against partition board failures]
FIG. 4 is a block diagram showing an embodiment of the line receiving unit and the line switching unit shown in FIG. 3, and the line receiving units 102-1 and 102-2 and the line switching unit 100-1 shown in FIG. 3 are examples. I'm taking it.

As shown in FIG. 4, the line switching unit 100-1 is provided with a first scanning circuit 112-1 that functions as a first line scanning unit and a second scanning circuit 112-2 that functions as a second line scanning unit. Further, a changeover switch unit 114 and a line changeover control unit 116 are provided.

In the first scanning circuit 112-1, 16 fire detectors 16 belonging to the group G1 arranged in the 0 to 800 m section of the upstream tunnel 1a are included in the signal line group 80-1 for each signal line of 16 lines. Is connected by.

In the second scanning circuit 112-2, 16 fire detectors 16 belonging to the group G2 arranged in the 800 to 1600 m section of the upstream tunnel 1a are included in the signal line group 80-2, and each signal line of the 16 lines. Is connected by.

The first scanning circuit 112-1 and the second scanning circuit 112-2 include input terminals indicated by numbers 0 to n (where n = 16), and the input terminal of number 0 is an empty terminal and has numbers 1 to n. The signal lines from the fire detectors 16 of the groups G1 and G2 are individually connected to the input terminals.

The first scanning circuit 112-1 and the second scanning circuit 112-2 sequentially select the input terminals of numbers 0 to n by switching and scanning the switching section indicated by the arrow, and the line is input from the fire detector 16. Output the signal selectively.

Such a first scanning circuit 112-1 and a second scanning circuit 112-2 are realized by a known scanning circuit or selector circuit provided with a plurality of gate switches that are turned on and off by a line switching control signal from the outside. Will be done.

The output of the first scanning circuit 112-1 is input to the first line receiving unit 102-1 provided on the partition board 60-1, and the first line receiving unit 102-1 switches scanning of the first scanning circuit 112-1. When the reception of the fire detection signal is determined from the line signal selected by the above, the division control unit 96 shown in FIG. 3 outputs the fire detection signal together with the line number indicating the fire detection line, and causes the fire alarm control to be performed. The determination of the fire detection line by the first line receiving unit 102-1 is determined based on the line switching control signal output from the line switching control unit 116 to the first scanning circuit 112-1 by the dotted line route.

The output of the second scanning circuit 112-2 is input to the second line receiving unit 102-2 provided on the partition board 60-2, and the second line receiving unit 102-2 switches and scans the second scanning circuit 112-2. When the reception of the fire detection signal is determined from the line signal selected by the above, the division control unit 96 shown in FIG. 3 outputs the fire detection signal together with the line number indicating the fire detection line, and causes the fire alarm control to be performed. The determination of the fire detection line by the second line receiving unit 102-2 is determined based on the line switching control signal output from the line switching control unit 116 to the second scanning circuit 112-2 by the dotted line route.

(Line switching control during normal operation)
The line switching control unit 116 shows the changeover switch unit 114 when the partition boards 60-1 and 60-2 have no failure and the first line receiving unit 102-1 and the second line receiving unit 102-2 are normal. The line switching control signal for sequentially switching the input terminals 0 to n in a predetermined cycle is repeatedly output in parallel to the first scanning circuit 112-1 and the second scanning circuit 112-2 in the state of being turned off as in the above. The line signal selected by the switching scan of the first scanning circuit 112-1 is output to the first line receiving unit 102-1, and the line signal selected by the switching scanning of the second scanning circuit 112-2 is received by the second line. It is output to unit 102-2.

The line switching control signal output by the line switching control unit 116 to the first scanning circuit 112-1 and the second scanning circuit 112-2 is, for example, a 4-bit line switching control signal indicating the input terminal numbers 0 to n. The first scanning circuit 112-1 and the second scanning circuit 112-2 selectively connect input terminals by decoding a 4-bit line switching control signal.

The 4-bit line switching control signal from the line switching control unit 116 is input to the first line receiving unit 102-1 and the second line receiving unit 10-2, and is input to the first scanning circuit 112-1 and the second scanning circuit. The line number of the line signal selected and output from 112-2 can be determined.

(Line switching control in case of partition board 60-1 failure)
When the function of the first line receiving unit 102-1 is lost due to the failure of the partition board 60-1, the line switching control unit 116 turns on the changeover switch unit 114 to cause the first scanning circuit 112-1. The output is switched to the input of the second line receiving unit 102-2, and the all-zero 4-bit line switching control signal is output to the first scanning circuit 112-1 and the second scanning circuit 112-2, and the number 0 is empty. Fix it in the state where it is switched and connected to the terminal.

In this state, the line switching control unit 116 outputs a line switching control signal to the second scanning circuit 112-2, sequentially switches the input terminals of numbers 1 to n, and outputs the line signal from the fire detector 16 of the group G2. After selective output to the 2-line receiver 102-2, it is switched to the empty terminal of number 0 and fixed, and then the line switching control signal is output to the first scanning circuit 112-1 to be the input terminal of numbers 1 to n. After sequentially switching to and outputting the line signal from the fire detector 16 of the group G1 to the second line receiving unit 102-2 of the normal partition board 60-2 via the changeover switch unit 114, the number 0 is empty. Switch to the terminal and fix it, and repeat these operations below.

When the function of the first line receiving unit 102-1 is lost due to the failure of the partition board 60-1, the signal lines are selected in the order of the second scanning circuit 112-2 and the first scanning circuit 112-1. Fire monitoring function by the fire detector 16 belonging to the group G1 corresponding to the failed partition board 60-1 by performing the switching scan to input to the second line receiving unit 102-2 of the normal partition board 60-2. Is not lost and high redundancy is obtained.

In this case, the selection cycle of the line signal of the fire detector 16 belonging to the groups G1 and G2 takes twice as long as the second scanning circuit 112-2 and the first scanning circuit 112-1 are switched and scanned in order. However, if the scanning cycle of 16 lines is, for example, 10 milliseconds per line, it is 160 milliseconds, and even if this is doubled, it is 320 milliseconds, which is a time delay that causes a problem in fire monitoring. Must not be.

(Line switching control in case of partition board 60-2 failure)
When the function of the second line receiving unit 102-2 is lost due to the failure of the partition board 60-2, the line switching control unit 116 turns on the changeover switch unit 114 to cause the second scanning circuit 112-2. The output is switched to the input of the first line receiving unit 102-1, and the all-zero 4-bit line switching control signal is output to the first scanning circuit 112-1 and the second scanning circuit 112-2, and the number 0 is empty. Fix it in the state where it is switched and connected to the terminal.

In this state, the line switching control unit 116 outputs the line switching control signal to the first scanning circuit 112-1, switches to the input terminals of numbers 1 to n, and outputs the line signal from the fire detector 16 of the group G1 to the first. After selecting and outputting to the line receiving unit 102-1, it is switched to the empty terminal of number 0 and fixed, and then the line switching control signal is output to the second scanning circuit 112-2 to be the input terminal of numbers 1 to n. After switching to and outputting the line signal from the fire detector 16 of the group G2 to the first line receiving unit 102-1 of the normal partition board 60-1 via the changeover switch unit 114, the empty terminal of number 0 Switch to and fix it, and repeat these operations below.

Even when the function of the second line receiving unit 102-2 is lost due to the failure of the partition board 60-2, the signal lines are selected in the order of the first scanning circuit 112-1 and the second scanning circuit 112-2. Fire monitoring function by the fire detector 16 belonging to the group G2 corresponding to the failed partition board 60-2 by performing the switching scan to input to the first line receiving unit 102-1 of the normal partition board 60-1. Is not lost and high redundancy is obtained.

(Switching control of terminal devices other than fire detectors)
The line switching units 100-2, 100-3, 100-4 provided corresponding to the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 arranged in the upstream tunnel 1a shown in FIG. 3 have The same configuration as the first scanning circuit 112-1, the second scanning circuit 112-2, the changeover switch unit 114, and the line switching control unit 116 of the line switching unit 100-1 corresponding to the fire detector 16 shown in FIG. 4 is provided. Be done.

In this case, since the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 are divided into a 200-meter block section and have four lines in an 800-meter section, the first scanning circuit and the second scanning circuit are numbered 0 to 4. However, if a scanning circuit that switches and scans the input terminals of the same numbers 0 to 16 as the fire detector 16 is used, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 can be switched. By including 16 lines in each of the groups G1 and G2, the line switching units 100-2, 100-3, 100-4 are combined into one, and the first line receiving units 104-1 and 106 correspond to this. -1,108-1 can be combined into one, and the second line receiving units 104-2, 106-2, 108-2 can also be combined into one.

Further, the line connection to the first scanning circuit and the second scanning circuit does not need to be unified for each terminal device, and the line connection may be made so that different types of terminal devices coexist.

Further, in the present embodiment, since the line switching units 100-1 to 100-8 are provided, the first line receiving units 102-1, 102-3, 104-1, 104-3, 106- 1,106-3,108-1,108-3 and 2nd line receiver 102-2, 102-4, 104-2, 104-4, 106-2, 106-4, 108-2, 108-4 Only one circuit is provided in the circuit receiving section, and the circuit scale of the partition boards 60-1 to 60-4 shown in FIG. 2 is significantly larger than that of the line receiving section provided corresponding to the number of conventional lines. Can be made smaller.

(AND judgment of fire detection signal)
The partition control unit 96 shown in FIG. 3 receives the first line receiving unit 102 by the selective output from the first scanning circuit 112-1 when the partition boards 60-1 and 60-2 shown in FIG. 2 are normal without any failure. When -1 receives the first fire detection signal from the fire detector 16 belonging to the group G1 and discriminates and outputs the line number, it instructs the line switching control unit 116 to turn on the changeover switch unit 114 to turn on the changeover switch unit 114. The output of the 1-scanning circuit 112-1 is switched to the input of the 2nd line receiving unit 102-2, and the all-zero 4-bit line switching control signal is output to the 2nd scanning circuit 112-2, and the number 0 empty terminal is output. Switch to and fix to the connected state.

In this state, the line switching control unit 116 outputs the line switching control signal to the first scanning circuit 112-1, switches to the input terminals of numbers 1 to n, and selects the line signal from the fire detector 16 of the group G1 again. It is output and input to the second line receiving unit 102-2 via the changeover switch unit 114.

The partition control unit 96 compares the first and second line numbers when the first line receiving unit 102-1 receives the second fire detection signal and outputs the line number, and when both match, a fire occurs. The AND reception of the detection signal is determined, and the fire alarm control is performed after confirming that the fire detection signal is truly received.

Further, in the partition control unit 96, the second line receiving unit 102-2 receives the first fire detection signal from the fire detector 16 belonging to the group G2 and the line number is changed by the selective output from the second scanning circuit 112-2. When it is determined and output, the line switching control unit 116 is instructed to turn on the changeover switch unit 114 to switch the output of the second scanning circuit 112-2 to the input of the first line receiving unit 102-1. , An all-zero 4-bit line switching control signal is output to the first scanning circuit 112-1 and fixed in a state of being switched and connected to an empty terminal of number 0.

In this state, the line switching control unit 116 outputs the line switching control signal to the second scanning circuit 112-2, switches to the input terminals of numbers 1 to n, and selects the line signal from the fire detector 16 of the group G2 again. The output is output and input to the first line receiving unit 102-1 via the changeover switch unit 114.

The partition control unit 96 compares the first and second line numbers when the second line receiving unit 102-2 receives the second fire detection signal and outputs the line number, and when both match, a fire occurs. The AND reception of the detection signal is determined, and it is confirmed and determined that the fire detection signal is truly received, and the fire alarm control is performed.

By discriminating the AND reception of such a fire detection signal and performing fire alarm control, if the fire detector temporarily outputs a fire detection signal due to a malfunction or the like, the fire detection signal will not be AND-received and an erroneous report will be sent. Therefore, the reliability of fire monitoring can be improved without blocking the passage of the tunnel.

It should be noted that the determination of AND reception of the line signal from the terminal device may be performed for other terminal devices other than the fire detector as needed.

[Countermeasures for partition boards and line switching boards]
FIG. 5 is a block diagram showing another embodiment of the line receiving unit and the line switching unit shown in FIG. 3, and the line switching unit 100-1 shown in FIG. 3 is taken as an example, and the scanning circuit of the line switching unit is taken as an example. The feature is that the redundancy is increased by duplicating.

As shown in FIG. 5, the line switching unit 100-1 is provided with a first main scanning circuit 118-1 and a first sub-scanning circuit 120-1 that function as a first line switching unit, and a second line. A second main scanning circuit 118-2 and a second sub-scanning circuit 120-2 that function as switching units are provided, and a changeover switch units 114-1 and 114-2 and a line switching control unit 116 are further provided.

In the first main scanning circuit 118-1, 16 fire detectors 16 belonging to the group G1 arranged in the 0 to 800 m section of the upstream tunnel 1a are included in each of the 16 lines included in the signal line group 80-1. It is connected by a signal line. In the first sub-scanning circuit 120-1, each input of the first main scanning circuit 118-1 is branched and input in parallel.

In the second main scanning circuit 118-2, 16 fire detectors 16 belonging to the group G2 arranged in the 800 to 1600 m section of the upstream tunnel 1a are included in each signal of the 16 lines included in the signal line group 80-2. It is connected by a line. The input of the second main scanning circuit 118-2 is branched into the second sub-scanning circuit 120-2, and the inputs are connected in parallel.

The first main scanning circuit 118-1 and the second main scanning circuit 118-2 are provided with input terminals indicated by numbers 0 to n (however, n = 16), and the input terminal of number 0 is an empty terminal and numbers 1 to 1. The signal lines from the fire detectors 16 of the groups G1 and G2 are individually connected to the input terminal of n.

The first main scanning circuit 118-1 and the second main scanning circuit 118-2 sequentially select the input terminals numbered 0 to n by switching scanning the switching section indicated by the arrow, and input from the fire detector 16. Selectively output the existing line signal.

The first sub-scanning circuit 120-1 and the second sub-scanning circuit 120-2 include input terminals indicated by numbers 0 to n (where n = 16), and the input terminal of number 0 is an empty terminal, and numbers 1 to 1 to The input terminals of the same numbers 1 to n of the first main scanning circuit 118-1 and the second main scanning circuit 118-2 are input-connected in parallel to the input terminal of n.

The first sub-scanning circuit 120-1 and the second sub-scanning circuit 120-2 sequentially select the input terminals numbered 0 to n by switching and scanning the switching section indicated by the arrow, and input from the fire detector 16. Selectively output the existing line signal.

The output of the first main scanning circuit 118-1 is input to the first line receiving unit 102-1 provided on the partition board 60-1, and the first line receiving unit 102-1 is supplied by the first main scanning circuit 118-1. When the reception of the fire detection signal is detected from the selected line signal, the division control unit 96 shown in FIG. 3 outputs the fire detection signal together with the line number indicating the fire detection line, and causes the fire alarm control to be performed. The determination of the fire detection line by the first line receiving unit 102-1 is determined based on the line switching control signal output from the line switching control unit 116 by the dotted line route.

The output of the second main scanning circuit 118-2 is input to the second line receiving unit 102-2 provided on the partition board 60-2, and the second line receiving unit 102-2 is supplied by the second main scanning circuit 118-2. When the reception of the fire detection signal is detected from the selected line signal, the division control unit 96 shown in FIG. 3 outputs the fire detection signal together with the line number indicating the fire detection line, and causes the fire alarm control to be performed. The determination of the fire detection line by the second main line receiving unit 102-2 is determined based on the line switching control signal output from the line switching control unit 116 by the dotted line route.

The output of the first sub-scanning circuit 120-1 is connected to the input of the second line receiving unit 102-2 via the changeover switch unit 114-1. The output of the second sub-scanning circuit 120-2 is connected to the input of the first line receiving unit 102-1 via the changeover switch unit 114-2.

(Line switching control during normal operation)
When the first line receiving unit 102-1 and the second line receiving unit 102-2 are normal, the line switching control unit 116 is in a state where the changeover switch units 114-1 and 114-2 are turned off as shown in the figure. , The line switching control signal for sequentially switching the input terminals 1 to n in a predetermined cycle is repeatedly output in parallel to the first main scanning circuit 118-1 and the second main scanning circuit 118-2, and the first main scanning circuit 118 The line signal selected by the switching scan of -1 is output to the first line receiving unit 102-1, and the line signal selected by the switching scanning of the second main scanning circuit 118-2 is output to the second line receiving unit 102-2. Is output to.

The line switching control unit 116 is the first main scanning circuit 118-1 and the second main scanning circuit 118.
The line switching control signal output to -2 is, for example, a 4-bit line switching control signal indicating the numbers 0 to n of the 4 input terminals, and the first main scanning circuit 118-1 and the second main scanning circuit 118-2 are The input terminal is selectively connected by decoding the 4-bit line switching control signal.

The 4-bit line switching control signal from the line switching control unit 116 is also input to the first line receiving unit 102-1 and the second line receiving unit 102-2, and the first main scanning circuit 118-1 and the second It is possible to determine the line number corresponding to the input terminal number of the line signal selected and output from the main scanning circuit 118-2.

When the first line receiving unit 102-1 and the second line receiving unit 102-2 are normal, the first sub-scanning circuit 120-1 and the second sub-scanning circuit 120-2 are fixed to the empty terminals of number 0. The switching scanning may be stopped in this state, or the switching scanning may be performed in synchronization with the first main scanning circuit 118-1 and the second main scanning circuit 118-2.

(Line switching control in case of partition board 60-1 failure)
FIG. 6 is a block diagram showing line reception control when the first line receiving unit of FIG. 5 fails. The operating portion is shown by a solid line, the operation stop portion is shown by a dotted line, and the line switching control unit 116 is omitted. ing.

As shown in FIG. 6, when the function of the first line receiving unit 102-1 is lost due to the failure of the partition board 60-1, the line switching control unit 116 turns on the changeover switch unit 114-1. The output of the first sub-scanning circuit 120-1 is switched to the input of the second line receiving unit 102-2, and the first main scanning circuit 118-1 and the second sub-scanning circuit 120-2 are all-zero 4-bit. The line switching control signal is output and fixed to the empty terminal of number 0.

In this state, the line switching control unit 116 outputs the line switching control signal to the second main scanning circuit 118-2, switches to the input terminals of numbers 1 to n, and outputs the line signal from the fire detector 16 of the group G2. After selecting and outputting to the 2-line receiver 102-2, the terminal is switched to the empty terminal of number 0 and fixed, and then the line switching control signal is output to the first sub-scanning circuit 120-1 to be numbered 1 to n. After switching to the input terminal and selectively outputting the line signal from the fire detector 16 of the group G1 to the second line receiving unit 102-2 of the normal partition board 60-2 via the changeover switch unit 114-1, the number. It is switched to an empty terminal of 0 and fixed, and these operations are repeated thereafter.

When the function of the first line receiving unit 102-1 is lost due to the failure of the partition board 60-1, the signal line is in the order of the second main scanning circuit 118-2 and the first sub scanning circuit 120-1. By performing a switching scan to input to the second line receiving unit 102-2 of the normal partition board 60-2, a fire by the fire detector 16 belonging to the group G1 corresponding to the failed partition board 60-1 The monitoring function is not lost, and high redundancy can be obtained.

In this case, the selection cycle of the line signal of the fire detector 16 belonging to the groups G1 and G2 is twice as long as the second main scanning circuit 118-2 and the first sub scanning circuit 120-1 are switched and scanned in order. However, it does not cause a time delay that is a problem for fire monitoring.

(Line switching control in case of partition board 60-2 failure)
FIG. 7 is a block diagram showing line reception control when the second line receiving unit of FIG. 5 fails. The operating portion is shown by a solid line, the operation stop portion is shown by a dotted line, and the line switching control unit 116 is omitted. ing.

As shown in FIG. 7, when the function of the second line receiving unit 102-2 is lost due to the failure of the partition board 60-2, the line switching control unit 116 turns on the changeover switch unit 114-2. The output of the second sub-scanning circuit 120-2 is switched to the input of the first line receiving unit 102-1, and the first sub-scanning circuit 120-1 and the second main scanning circuit 118-2 are all-zero 4-bit. The line switching control signal is output and fixed in the state of being switched and connected to the empty terminal of number 0.

In this state, the line switching control unit 116 outputs the line switching control signal to the first main scanning circuit 118-1, switches to the input terminals of numbers 1 to n, and outputs the line signal from the fire detector 16 of the group G1. After selecting and outputting to the 1-line receiving unit 102-1, the terminal is switched to the empty terminal of number 0 and fixed, and then the line switching control signal is output to the second sub-scanning circuit 120-2 to be numbered 1 to n. After switching to the input terminal and selectively outputting the line signal from the fire detector 16 of the group G2 to the first line receiving unit 102-1 of the normal partition board 60-1 via the changeover switch unit 114-2, the number It is switched to an empty terminal of 0 and fixed, and these operations are repeated thereafter.

Even when the function of the second line receiving unit 102-2 is lost due to the failure of the partition board 60-2, the signal line is in the order of the first main scanning circuit 118-1 and the second sub scanning circuit 120-2. By performing a switching scan to input to the first line receiving unit 102-1 of the normal partition board 60-1, a fire by the fire detector 16 belonging to the group G2 corresponding to the failed partition board 60-2. The monitoring function is not lost, and high redundancy can be obtained.

(Line switching control when the first main scanning circuit 118-1 fails)
In the line switching control unit 116, when the first main scanning circuit 118-1 of the line switching unit 100-1 fails, the partition board 60-1 fails and the first line receiving unit 102-1 loses its function. Similarly, by turning on the changeover switch unit 114-1, the output of the first sub-scanning circuit 120-1 is switched to the input of the second line receiving unit 102-2, and the first main scanning circuit 118-1 and An all-zero 4-bit line switching control signal is output to the second sub-scanning circuit 120-2 and fixed to the empty terminal of number 0.

In this state, the line switching control unit 116 outputs the line switching control signal to the second main scanning circuit 118-2, switches to the input terminals of numbers 1 to n, and outputs the line signal from the fire detector 16 of the group G2. After selecting and outputting to the 2-line receiver 102-2, the terminal is switched to the empty terminal of number 0 and fixed, and then the line switching control signal is output to the first sub-scanning circuit 120-1 to be numbered 1 to n. After switching to the input terminal and selectively outputting the line signal from the fire detector 16 of the group G1 to the second line receiving unit 102-2 of the normal partition board 60-2 via the changeover switch unit 114-1, the number. It is switched to an empty terminal of 0 and fixed, and these operations are repeated thereafter. As a result, even if the first main scanning circuit 118-1 fails, the monitoring function by the fire detector 16 of the group G1 is not lost.

(Line switching control when the second main scanning circuit 118-2 fails)
In the line switching control unit 116, when the second main scanning circuit 118-2 of the line switching unit 100-1 fails, the partition board 60-2 fails, and the second line receiving unit 102-2 loses its function. Similarly, by turning on the changeover switch unit 114-2, the output of the second sub-scanning circuit 120-2 is switched to the input of the first line receiving unit 102-1, and the first sub-scanning circuit 120-1 and An all-zero 4-bit line switching control signal is output to the second main scanning circuit 118-2 and fixed in a state where it is switched and connected to the empty terminal of number 0.

In this state, the line switching control unit 116 outputs the line switching control signal to the first main scanning circuit 118-1, switches to the input terminals of numbers 1 to n, and outputs the line signal from the fire detector 16 of the group G1. After selecting and outputting to the 1-line receiving unit 102-1, the terminal is switched to the empty terminal of number 0 and fixed, and then the line switching control signal is output to the second sub-scanning circuit 120-2 to be numbered 1 to n. After switching to the input terminal and selectively outputting the line signal from the fire detector 16 of the group G2 to the first line receiving unit 102-1 of the normal partition board 60-1 via the changeover switch unit 114-2, the number It is switched to an empty terminal of 0 and fixed, and these operations are repeated thereafter. As a result, even if the second main scanning circuit 118-2 fails, the monitoring function by the fire detector 16 of the group G2 is not lost.

(Switching control of terminal devices other than fire detectors)
The line switching units 100-2, 100-3, 100-4 provided corresponding to the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 arranged in the upstream tunnel 1a shown in FIG. 3 have The first main scanning circuit 118-1, the first sub-scanning circuit 120-1, the second main scanning circuit 118-2, and the second sub-scanning of the line switching unit 100-1 corresponding to the fire detector 16 shown in FIG. The same configuration as the circuit 120-2, the changeover switch units 114-1, 114-2, and the line changeover control unit 116 is provided.

In this case, since the manual notification device 20, the fire extinguishing switch 22 and the water spray switch 24 are divided into a 200-meter block section and have four lines in an 800-meter section, the first main scanning circuit, the first sub-scanning circuit, and the second The main scanning circuit and the second sub-scanning circuit switch and scan the input terminals of numbers 0 to 4, but if a scanning circuit that switches and scans the input terminals of numbers 0 to 16 which is the same as the fire detector 16 is used, By including the manual notification device 20, the fire extinguishing plug switch 22, and the water spray switch 24 in groups G1 and G2 to form 16 lines each, the line switching units 100-2, 100-3, and 100-4 are combined into one. The first line receiving units 104-1, 106-1, 108-1 can be combined into one, and the second line receiving units 104-2, 106-2, 108-2 can also be combined into one.

Further, the line connection to the first scanning circuit and the second scanning circuit does not need to be unified for each type of terminal device, and the line connection may be made so that different types of terminal devices coexist.

(AND judgment of fire detection signal)
The partition control unit 96 shown in FIG. 3 is a first line receiving unit based on a selective output from the first main scanning circuit 118-1 when the partition boards 60-1 and 60-2 shown in FIG. 5 are normal without any failure. When 102-1 receives the first fire detection signal from the fire detector 16 belonging to the group G1 and discriminates and outputs the line number, it instructs the line switching control unit 116 to turn on the changeover switch unit 114-1. Then, the output of the first main scanning circuit 118-1 is switched to the input of the second line receiving unit 102-2, and the all-zero 4-bit line switching control signal is output to the second main scanning circuit 118-2. Fix it in the state where it is switched and connected to the empty terminal of number 0.

When the first line receiving unit 102-1 and the second line receiving unit 102-2 are normal, the first sub-scanning circuit 120-1 and the second sub-scanning circuit 120-2 are fixed to the empty terminals of number 0. In this state, the switching scan is stopped, or the switching scan is performed in synchronization with the first main scanning circuit 118-1 and the second main scanning circuit 118-2.

In this state, the line switching control unit 116 outputs the line switching control signal to the first main scanning circuit 118-1, switches to the input terminals of numbers 1 to n, and selects the line signal from the fire detector 16 of the group G1. The output is output and input to the second line receiving unit 102-2 via the changeover switch unit 114-1.

The partition control unit 96 compares the first and second line numbers when the second line receiving unit 102-2 receives the second fire detection signal and outputs the line number, and when both match, a fire occurs. By discriminating the AND reception of the detection signal, it is confirmed that the fire detection signal is truly received and the fire alarm control is performed.

Further, in the partition control unit 96, the second line receiving unit 102-2 receives the first fire detection signal from the fire detector 16 belonging to the group G2 and the line number by the selective output from the second main scanning circuit 118-2. Is determined and output, the line switching control unit 116 is instructed to turn on the changeover switch unit 114-2, and the output of the second main scanning circuit 118-2 is input to the first line receiving unit 102-1. And, it outputs an all-zero 4-bit line switching control signal to the second main scanning circuit 118-2 and fixes it in a state where it is switched and connected to the empty terminal of number 0.

In this state, the line switching control unit 116 outputs the line switching control signal to the second main scanning circuit 118-2, switches to the input terminals of numbers 1 to n, and selects the line signal from the fire detector 16 of the group G2. The output is output and input to the first line receiving unit 102-1 via the changeover switch unit 114.

The partition control unit 96 determines when the first line receiving unit 102-1 receives the second fire detection signal and outputs the line number, and determines the AND reception in which the first and second line numbers match. Fire alarm control is performed by confirming that the fire detection signal has been truly received and making a judgment.

As described above, when the line switching unit 100-1 in FIG. 5 also determines the AND reception of the fire detection signal and performs fire alarm control, the fire detector temporarily outputs the fire detection signal due to a malfunction or the like. , The reliability of fire monitoring can be improved because the AND reception of the fire detection signal is not performed and the tunnel passage is not blocked due to a false report.

It should be noted that the determination of AND reception of the line signal from the terminal device may be performed for other terminal devices other than the fire detector as needed.

[Modified example of the present invention]
(Terminal device)
In the above embodiment, a fire detector, a manual notification device, a fire hydrant switch, and a water spray switch are taken as examples of terminal devices connected to the partition board by a signal line, but the present invention is not limited to this, and is related to a fire. It can also be applied when operating an appropriate terminal device to be operated, for example, an emergency telephone notification operation, taking out a fire extinguisher, etc., to be connected to a partition board as a terminal device.

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

1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receivers 11, 12, 14: Signal line group 16: Fire detector 18: Fire extinguisher device 20: Manual notification device 22: Fire extinguishing plug switch 23: Automatic valve device 24: Water Spray switch 25: Fire extinguishing pump equipment 28: Ventilation equipment 30: Alarm display board equipment 32: Radio rebroadcast equipment 34: TV monitoring equipment 36: Lighting equipment 38: IG slave station equipment 40: Network 42: Remote management equipment 46: Control rack 48: Control CPU board 50: Control CPU spare board 52: Section rack 54: Section CPU board 56: Section CPU spare board 60-1 to 60-4: Section board 62: P-type output board 64-1, 64-2: Line switching board 65: Operation display CPU board 66: Operation unit 68: Acoustic unit 70: Display control board 72: Display unit 74: Serial CPU boards 80-1 to 86-4: Signal line group 90: Main control unit 92: Serial Transmission unit 94: P-type output unit 96: Partition control unit 100-1 to 100-8: Line switching unit 102-1, 104-1, 106-1, 108-1: First line receiving unit 102-2, 104 -2, 106-2, 108-2: 2nd line receiving unit 112-1: 1st scanning circuit 112-2: 2nd scanning circuit 114, 114-1, 114-2: changeover switch unit 116: line changeover control Part 118-1: 1st main scanning circuit 118-2: 2nd main scanning circuit 120-1: 1st sub-scanning circuit 120-2: 2nd sub-scanning circuit

Claims (3)

It is a tunnel disaster prevention system that connects multiple terminal devices to the disaster prevention receiver via multiple lines and receives and controls signals from the terminal devices on a line-by-line basis.
A first line scanning unit that selects and outputs signals input from a plurality of terminal devices belonging to one group when the plurality of terminal devices are divided into two groups by switching scanning, and a first line scanning unit.
A second line scanning unit that selects and outputs signals input from a plurality of terminal devices belonging to the other group of the two groups by switching scanning, and
A first line receiving unit that receives a signal selected by switching scanning of the first line scanning unit and instructs a predetermined control, and a first line receiving unit.
A second line receiving unit that receives a signal selected by switching scanning of the second line scanning unit and instructs a predetermined control, and a second line receiving unit.
When a predetermined signal is received by the first line receiving unit by the output from the first line scanning unit, the output of the first line scanning unit is switched to the second line receiving unit to receive the first line. When the same predetermined signal as the unit is received by the second line receiving unit, control based on the received predetermined signal is instructed, and the second line reception is performed by the output from the second line scanning unit. When a predetermined signal is received by the unit, the output of the second line scanning unit is switched to the first line receiving unit, and the same predetermined signal as the second line receiving unit is received by the first line receiving unit. When received, a line switching control unit that instructs control based on the received predetermined signal, and a line switching control unit.
A tunnel disaster prevention system characterized by being equipped with.
In the tunnel disaster prevention system according to claim 1,
The first line scanning unit is
A first main scanning circuit in which signals from a plurality of terminal devices belonging to the one group are input in parallel, and the signals input in parallel are selected and output by switching scanning.
A first sub-scanning circuit in which a signal input in parallel to the first main scanning circuit is branched and input in parallel, and the signals input in parallel are sequentially repeatedly selected and output.
Equipped with
The second line scanning unit is
A second main scanning circuit in which signals from a plurality of terminal devices belonging to the other group are input in parallel, and the signals input in parallel are selected and output by switching scanning, and
A second sub-scanning circuit in which a signal input in parallel to the second main scanning circuit is branched and input in parallel, and a signal to be input in parallel is selected and output by switching scanning, and a second sub-scanning circuit.
Equipped with
The line switching control unit is
When a predetermined signal is received by the first line receiving unit by the output from the first main scanning circuit, the output of the first sub-scanning circuit is switched to the second line receiving unit to receive the first line. When the same predetermined signal as the unit is received by the second line receiving unit, control based on the received predetermined signal is instructed, and the second line reception is performed by the output from the second main scanning circuit. When a predetermined signal is received by the unit, the output of the second sub-scanning circuit is switched to the first line receiving unit, and the same predetermined signal as the second line receiving unit is received by the first line receiving unit. A tunnel disaster prevention system, characterized in that, when received, control is instructed based on the received predetermined signal.
In the tunnel disaster prevention system according to claim 1 or 2, the first line receiving unit and the second line receiving unit are predetermined when a fire reception signal of a fire detector by the same signal line is received by both of them. A tunnel disaster prevention system characterized by instructing fire alarm control.

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