JP2002246962A - Tunnel disaster prevention facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily specify a disconnection part inside a tunnel by an operation, on the side of a disaster prevention reception panel. SOLUTION: For the tunnel disaster prevention facilities, terminal equipment, such as a detector 5 and control equipment installed inside the tunnel, is connected to a transmission line 2a comprising a power line and a signal line pulled out from the disaster prevention reception panel 1, a relay amplification panel 7 is connected at prescribed intervals, the respective relay amplification panels 7 supply power to an outgoing side transmission line at a terminal side and the inside of the tunnel is monitored and controlled. The relay amplifying panel 7 is provided with a backup circuit for backing up power supply to a disconnected incoming side transmission line and signal transmission with the disaster prevention reception panel, at detecting of the disconnection of the incoming side transmission line at the side of the disaster prevention reception panel 1. The disaster prevention reception panel 1 is provided with a fault investigation part 25 for transmitting the control signals of a fault investigation to the relay amplification panel to temporarily cancel a backup operation for the disconnection of the transmission line, and specifying the disconnection part, on the basis of the response state of the terminal equipment during the time in between.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a detector and a control device installed in a tunnel to a transmission line including a power line and a signal line drawn from a disaster prevention receiver and connects a relay amplifier at predetermined intervals. And a tunnel disaster prevention facility for monitoring and controlling the inside of a tunnel.

[0002]

2. Description of the Related Art Conventionally, as a disaster prevention facility used for a tunnel on a motorway, addresses are assigned to a plurality of terminal devices connected to a transmission line drawn into the tunnel from a disaster prevention receiver, and various types of addresses are designated. A so-called R-type transmission system is used in which a fire detector collects information from a fire detector by transmitting the command, and controls water discharge from a water spray head when a fire is determined.

In a tunnel disaster prevention equipment employing such an R-type transmission system, for example, as shown in FIG.
For example, a fire detector 105 is connected to the transmission line 102 drawn into the tunnel from No. 1. Also, the transmission line 10
Approx. 800 in the tunnel to prevent voltage drop
The relay amplification boards 107 are arranged at regular intervals such as meters.

Here, the transmission line 102 includes a power supply line SV, a common line SC, a downstream signal line SA for transmitting a signal to the terminal in a voltage mode, and an upstream signal line SB for transmitting a signal from the terminal in a current mode. The relay amplification board 107 has a built-in power supply, and supplies power between the common power supply line SC and the downstream power supply line SV on the terminal side from each repeater 107.
In addition, the disaster prevention receiver 10 is used up to the first relay amplifier 107.
1 from the power supply.

[0005]

By the way, such a problem is solved.
For tunnel disaster prevention equipment using the R-type transmission method,
When the upstream transmission line is broken, the return relay contact is closed by the operation of the return relay, the built-in power is supplied to the broken upstream power line to back up, and the broken signal line is separated. The signal transmission with the disaster prevention receiver is backed up by connecting the signal lines of the system.

The backup operation at the time of disconnection in such a relay amplifying board is performed immediately when disconnection is detected, and the terminal device connected to the disconnection section has a short disconnection time. The power is not completely reduced by the capacitor, and no abnormality occurs from the terminal device. For this reason, even if a disconnection occurs on the terminal side, there is a problem in that it is difficult to identify the disconnection location because no abnormality is displayed on the disaster prevention receiver.

[0007] In order to specify a broken point when the backup by the loopback control is being performed, it is necessary to disconnect the broken line of the relay amplifier board that is performing the loopback control from the terminal and output an abnormality to the terminal device. There is. But,
Since the relay amplification board is installed in the tunnel, it is difficult to cope with a failure that requires the work of disconnecting the line from the terminal.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tunnel disaster prevention facility which can easily identify a broken point in a tunnel by operating a disaster prevention receiver.

[0009]

According to the present invention, a terminal device such as a detector or a control device installed in a tunnel is connected to a transmission line including a power supply line and a signal line drawn from a disaster prevention receiver and a predetermined interval. A relay amplifier panel is connected to each terminal, and each relay amplifier panel is a tunnel disaster prevention facility that supplies power to a downstream transmission line that is a terminal side and monitors and controls the inside of the tunnel. When a disconnection is detected on the upstream transmission line, a backup circuit is provided to back up the power supply to the disconnected upstream transmission line and the signal transmission between the disaster prevention receiver panel, and relay the control signal for fault investigation to the disaster prevention receiver panel. And the backup operation for the disconnection of the transmission line is temporarily released, and a failure investigation unit for specifying the disconnection point based on the response state of the terminal device is provided during the transmission.

Further, according to the present invention, terminal equipment such as detectors and control equipment installed in a tunnel is connected to two sets of transmission lines including a power supply line and a signal line drawn from a disaster prevention receiver and relayed at predetermined intervals. Amplifying panels are connected, and each relay amplifying panel is a tunnel disaster prevention facility that supplies power to the downstream line on the terminal side and monitors and controls the inside of the tunnel.
When the disconnection of the upstream power supply line on the receiving panel side is detected, the power supply inside the panel is supplied to the disconnected upstream power supply line by closing the folded contact, and when the disconnection of the upstream signal line on the receiving panel side is detected, A backup circuit is provided to connect the signal line of the transmission line of the other system to the upstream signal line that has been broken by closing, and the disaster prevention receiver transmits a control signal based on the instruction operation for failure investigation to the relay amplifier panel. A backup operation for disconnection of a signal line and / or a power supply line is temporarily canceled, and a failure investigation unit for specifying a disconnection location based on a response state of the terminal device is provided during the backup operation.

[0011] Here, the backup circuit of the relay amplifying panel, when receiving a fault investigation control signal from the disaster prevention receiving panel during the backup operation by detecting the disconnection of the power supply line, provides the terminal device with a power supply backup for the disconnected power supply line. The power supply backup is restarted after the provided capacitor has stopped for a predetermined time to finish discharging, and the fault investigation unit of the disaster prevention receiver receives a normal response signal by sequentially calling the terminal device after the power supply backup operation is restarted in the relay amplification panel. Between the terminal device that has received the initial response signal immediately after power-on and the adjacent terminal device that has received the initial response signal as a disconnection point.

The backup circuit of the relay amplifying board receives the failure investigation control signal from the disaster prevention receiving board during the backup operation by detecting the disconnection of the signal line, and receives the restoration control signal for the backup operation for the disconnected signal line. Stops and restarts until it stops, and the fault investigation unit of the disaster prevention receiving board calls the terminal devices sequentially while the backup operation of the relay amplification board is stopped, and the terminal device that received the response signal and the adjacent terminal device that does not respond Identify the gap as a break.

As described above, according to the present invention, a failure investigation control signal is transmitted to a relay amplification panel by a switch operation of a disaster prevention reception panel or the like, and the relay amplification panel receiving the failure investigation control signal transmits the failure investigation control signal to an upstream transmission line. When a disconnection failure has occurred, the backup circuit is turned off for a certain period of time, and a failure state from the terminal device is output and responded, thereby identifying the location of the disconnection.

Therefore, even if a line break occurs,
The disconnection point can be specified from the disaster prevention receiver without entering the tunnel. In addition, compared to a method in which a person breaks the track and investigates the location of the break, the unmonitored time can be reduced, and the off state of the backup circuit associated with the fault investigation automatically returns. It is possible to avoid being left unattended.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram of the system configuration of a tunnel disaster prevention equipment according to the present invention.

In FIG. 1, a disaster prevention receiver 1 is installed in a monitoring room of a tunnel facility. From the disaster prevention receiver 1, an up tunnel transmission line 2a is drawn out for an up tunnel, and a down tunnel transmission line is drawn for a down tunnel. 2b is drawn out, and in this embodiment, the upstream tunnel transmission line 2a
Side view.

As the upstream tunnel transmission line 2a, a detector line 3a and a repeater line 3b are drawn from the disaster prevention receiver 1. Detector line 3a and repeater line 3b
Is wired in a duct such as a guard passage built at the base of the tunnel wall at the shoulder of the road in the tunnel.

A fire detector 5 is connected to the detector line 3a at a predetermined interval, and a relay 6 for controlling water spray discharge from a water spray head is connected to a relay line 3b at a predetermined interval. I have. .. 7-n are provided for the detector line 3a and the repeater line 3b at regular intervals, for example, at every 800 m.

Further, a pump control panel 9 is provided for the disaster prevention receiving panel 1, and a fire extinguishing pump (not shown) is operated by the pump control panel 9 to control pressurized fire extinguishing water when the water spraying head is controlled to discharge water. The water is supplied to the head inside to perform water spray control.

Transmission of control signals and response signals between the disaster prevention receiver 1 and the fire detector 5 and between the disaster prevention receiver 1 and the repeater 6 and the relay amplifiers 7-1 to 7-n are respectively unique. A control signal or a response signal including an address designating a control target or a response destination is transmitted through the detector line 3a and the repeater line 3b, and the receiving side has its own address. Upon receiving a control signal or a response signal of the matching address, necessary processing is performed.

The disaster prevention receiver 1 collects the fire detector connected to the detector line 3a and the repeater 6 connected to the repeater line 3b and assigns them sequentially from the first address to the last address. The call signal from the terminal device from the disaster prevention receiver 1 is sent out to the detector line 3a and the repeater line 3b in common.

For this reason, even if a failure such as disconnection occurs on the detector line 3a side, for example, if the detector line 3a side is connected for backup, it is relayed to the detector line 3a having the disconnection. A signal can be transmitted to and from the disaster prevention receiver 1 from the device line 3b side.

Transmission between the disaster prevention receiver 1 and the fire detector 5, the repeater 6, and the relay amplifiers 7-1 to 7-n is performed by a control signal or a response signal including an address when a processing request is generated. In addition to the transmission method for transmitting the polling command, the disaster prevention receiver 1 may transmit a polling command to the terminal at a constant interval, and control by the polling command and return a response signal by a response command to the polling command.

In the disaster prevention monitoring system according to the present invention, a failure investigation switch 4 is provided on the disaster prevention reception panel 1, and when the failure investigation switch 4 is operated, the relay amplification boards 7-1 to 7-.
A failure investigation message as a failure investigation control signal is transmitted to all of n. In the relay amplifying boards 7-1 to 7-n that have received the fault investigation message from the disaster prevention receiver 1, if there is a disconnection in the upstream detector line 3a or the repeater line 3b, the disconnection detection is performed. Since the power supply line and the signal line are backed up, the backup operation is turned off upon receipt of the failure investigation message, and a failure response due to the disconnection is received from the terminal device connected to the line causing the disconnection. Side, and the location of the disconnection is specified in the disaster prevention receiver 1 based on the failure response.

FIG. 2 is a block diagram of the disaster prevention receiver 1 of FIG. In FIG. 2, a main control unit 20 is provided in the disaster prevention receiver 1, and a transmission control unit 21 is provided for the main control unit 20. For example, a detector line 3 a is drawn from the transmission control unit 21 and connects a plurality of fire detectors 5 installed in a tunnel 22. Of course, in the middle of the detector line 3a in the tunnel 22, the relay amplification boards 7-1 and 7-
2,... Are provided.

An operation display control unit 23 is provided for the main control unit 20 of the disaster prevention receiver 1 via a bus, and the operation display control unit 23 is provided with a display unit 23a and a failure investigation switch 4. The operation unit 23b and the sound unit 23c are connected. Further, a printer 26 is provided to the main control unit 20 via a bus so that various data necessary for monitoring and controlling the disaster prevention receiver 1 can be printed out.

The communication control unit 2 is connected to the main control unit 20.
7, an external CRT 28 is connected to the CRT 28, and various kinds of reception information necessary for monitoring and controlling the disaster prevention receiver 1 are transmitted to the CRT 28.
It can be displayed above.

The main control unit 20 is provided with functions of a monitoring processing unit 24 realized by program control and a failure investigation unit 25 newly provided in the present invention. The monitoring processing unit 24 calls the fire detectors 5 installed in the tunnel 22 by sequentially specifying their addresses, and collects the fire detection information detected by each fire detector 5. If it is a fire, a fire detection display will be performed.

The fault investigation unit 25 newly provided according to the present invention is provided with a failure investigation switch 4 provided on the operation unit 23b.
, And sends a failure investigation message as a failure investigation control signal (failure investigation control command) to all of the relay amplification boards 7-1 to 7-n installed in the tunnel 22. . The relay amplifier panel responds to the failure investigation message from the failure investigation unit 25 by outputting a failure response from the fire detector 5 by turning off the backup operation for disconnection of the power supply line and / or the signal line in the relay amplification panel. And
The response output of the failure is received and stored in the failure investigation unit 25 of the disaster prevention receiver 1, and the disconnection position is specified.

FIG. 3 shows the relay amplifier 7- shown in FIGS.
FIG. 2 is a circuit block diagram of the first and seventh embodiments. Taking the relay amplifier 7-1 as an example, the detector line 3a and the relay line 3b are connected from the disaster prevention receiver 1 side. Looking at the detector line 3a, the power line S
V, a common line SC, a down signal line SA for transmitting a signal from the disaster prevention receiver 1 to the terminal in voltage mode, and an up signal line SB for transmitting a signal in current mode from the terminal to the disaster prevention receiver 1. Are connected.

This point is the same for the repeater line 3b. The power supply line SV, the common line SC, the downstream signal line SA,
Four of the up signal lines SB are connected. The power supply unit 16 is provided in the relay amplification board 7-1, and generates DC48V from a commercial AC power supply of AC100V.

The power output of 48 V DC from the power supply section 16 is supplied between the common power supply line SC and the downstream power supply line SV on the terminal side via a diode D2 when the detector line 3a is taken as an example. I have. The relay contact a1 of the return relay A1 connected to the signal processing unit 8 is connected to the power line SV and the common line SC on the upstream side with respect to the power unit 16.
1 and a12 are inserted, and a diode D
1 is connected.

The relay contacts a11 and a12 are normally open relay contacts of the return relay A1, the return relay A1 is normally inactive at normal times, and the relay contacts a11 and a12 are open as shown. Therefore, the power supply unit 16 does not supply power between the power line SV on the up side and the common line SC.

A voltage drop detection circuit 10-1 is provided between the power line SV on the up side and the common line SC. The voltage drop detection circuit 10-1 monitors the power supply voltage on the upstream side, and outputs a voltage drop detection signal to the signal processing unit 8 when the power supply voltage falls below the specified voltage or around 0V, and operates the return relay A1. .

When the return relay A1 is operated, the relay contacts a11 and a12 are closed, and the D
C48V is supplied through the relay contacts a11 and a12 between the power supply line SV on the lower side and the common line SC where the voltage has dropped, and is supplied to the fire detector connected to the power supply line on the upper side where the disconnection has occurred. Perform backup by turning the power back on.

The same applies to the repeater line 3b side. The voltage drop detecting circuit 10-3 for detecting a voltage drop between the power supply line SV and the common line SC and the signal processing section 8 which operates by detecting the voltage drop are provided. It is provided with the provided return relay A3 and its relay contacts a31 and a32.

The signal processing section 8 of the relay amplifier 7-1 is connected to the downstream signal line SA of the detector line 3a via a voltage buffer amplifier 12a, and the output thereof is supplied via a voltage buffer amplifier 12b. It is connected to the downstream side. The downstream upstream signal line SB is connected to the signal processing unit 8 via the current buffer amplifier 13a, and the output thereof is connected to the upstream side via the current buffer amplifier 13b. This point is the same for the downstream signal line SA and the upstream signal line SB of the repeater line 3b, and includes the voltage buffer amplifiers 14a and 14b and the current buffer amplifiers 15a and 15b.
Is provided.

Here, the downstream signal line S on the detector line 3a side
A call signal of the terminal device is commonly transmitted from the disaster prevention receiver 1 shown in FIGS. 1 and 2 to the downstream signal line SA on the side of the A and the repeater line 3b.

A voltage drop detection circuit 10-2 is provided for the downstream signal line SA and the upstream signal line SB on the detector line 3a side. The voltage drop detection circuit 10-2 detects disconnection of the downstream signal line SA and the upstream signal line SB. Specifically, disconnection detection is performed for the downstream signal line SA when the call signal from the disaster prevention receiver 1 is disconnected for more than a predetermined time.
Similarly, disconnection detection is performed for the uplink signal line SB when the response current from the terminal is disconnected for more than a predetermined time.

When a disconnection is detected by the voltage drop detection circuit 10-2, a disconnection detection signal is output to the signal processing section 8, and the return relay A2 is operated. The return relay A2 has relay contacts a21 and a22, and the relay contact a2
Numeral 1 is inserted into the transition connection line of the downstream signal line SA in the detector line 3a and the repeater line 3b. The relay contact a21 is connected to the detector line 3a and the relay line 3b.
Is inserted into the cross connection line of the upstream signal line SB.

Therefore, when the signal processing section 8 activates the return relay A2 by detecting the disconnection of the signal lines SA and SB in the voltage drop detection circuit 10-2, the relay contacts a21 and a2
2 is closed, the signal line SA, SB on the normal repeater line 3b side is connected to the detector line 3a on which the disconnection has occurred, whereby the detector line 3a on which the disconnection has occurred is connected.
A call response can be made from the normal repeater line 3b side to the disaster prevention receiver to the signal lines SA and SB side.

The voltage drop detection circuit 10-4 provided on the repeater line 3b side is connected to the down signal line SA or the up signal line SB.
In this case, as in the case of the detector line 3a, the return relay A2 is actuated by the disconnection detection output to the signal processing unit 8 to close the relay contacts a21 and a22.
The normal line of the detector line 3a is connected across the line of the repeater line 3b in which the disconnection has occurred, and backup is performed to enable a call response with the disaster prevention receiver 1. The configuration of such a relay amplifier 7-1 is the same for the relay amplifier 7-2 and the other relay amplifiers.

The fire detector 5 is connected to the detector line 3a in the relay amplification boards 7-1 and 7-2. The repeater 6 is connected to the repeater line 3b. The repeater 6 receives a control message from the disaster prevention receiver 1 and opens the conduction valve 18 so that the water spray head 17 is pressurized and extinguished by the fire pump. Water will be sprayed into the tunnel by supplying water.

Here, taking the detector line 3a side in the relay amplification board 7-1 as an example, the voltage drop detection circuit 10-1,
10-2, the return relays A1, A2, and their relay contacts a11, a12, a21, a22 constitute a backup circuit for the disconnection of the detector line 3a on the up side. In response to the backup circuit, when the signal processing unit 8 receives a fault investigation message from the disaster prevention receiver 1, if the backup circuit is operating, the backup circuit is turned off, thereby causing the detector line 3 a that has caused the disconnection. The backup of the power supply and the backup of the signal line for the upstream side is released, and the fire detector 5 connected to the detector line 3a, which has caused the disconnection, responds to the failure. The disconnection point can be specified.

FIG. 4 is a flowchart of a failure investigation process in the tunnel disaster prevention equipment of the present invention. In FIG.
First, the failure investigation switch 4 is turned on in the disaster prevention receiver 1 as in step S1. This fault investigation switch 4
May be performed periodically, such as once a day or once a week, or may be arbitrarily performed as needed.

When the failure investigation switch is turned on in step S1, the failure investigation unit 25 provided in the main control unit 20 of FIG.
Is activated, and in step S2, all the relay amplification boards 7-1 to 7
-Send a trouble investigation message to -n. Here, in the relay amplification board 7-2 of FIG. 3, the disconnection of the downstream signal line SA and the upstream signal line SB of the upstream detector line 3a is detected by the voltage drop detection circuit 10-2, and the signal processing unit 8 returns the signal. The operation of the relay A2 closes the relay contacts a21 and a22,
It is assumed that backup for connecting the normal repeater line 3b has been performed.

When a fault investigation message is received from the disaster prevention receiver 1 of FIG. 4 in the backup state for the signal line disconnection of the relay amplification board 7-2, the signal processing unit 8 operates in the failure investigation mode in step S101. Then, the return relay A2 in the ON state is turned off.

As a result, the relay contacts a21 and a22 are opened, and the signal line S on the side of the detector line 3a, which has been disconnected, is opened.
A and SB are signal lines SA and S on the normal repeater line 3b side.
B and the fire detector 5 connected to the disconnection side cannot receive the call from the disaster prevention receiver 1.

With the backup circuit for the signal line disconnection in the relay amplification board 7-1 turned off in this way, the disaster prevention reception board 1 uses the head address to the end address in step S3 to sequentially call the terminals. In response to such a terminal call from the disaster prevention receiver 1, the terminal 5 that is normally supplied with power can normally return a response message to the call using its own address.

Regarding the terminal call by such a disaster prevention receiver, confirmation storage is performed in step S4 as to whether or not there is a non-responding terminal. For the terminal device connected to the upstream side of the relay amplification board whose backup circuit has been turned off by the transmission of the failure investigation message in step S2, that is, the terminal device that does not receive a call from the disaster prevention receiver 1 due to disconnection, the terminal call is performed. , And this is confirmed and stored in step S4.

Subsequently, in step S5, based on the result of confirming the non-response of the terminal call sequentially performed from the first address to the last address, the section between the normally responding terminal and the adjacent non-responding terminal is determined. Identify and display the broken part.

After the specific display of the disconnection point is completed in step S5, the restoration message is transmitted from the disaster prevention receiver 1 to all the relay amplifiers in step S6. At this time, in the relay amplification board 7-1 in which the backup operation is turned off,
In step S102, based on the restoration message, the signal processing unit 8 ends the failure investigation mode, turns on the return relay A2 that has been turned off, and closes the relay contacts a21 and a22 again, thereby detecting the occurrence of the disconnection. Vessel line 3a
The backup state in which the signal lines SA and SB on the side are connected to the normal repeater line 3b side is restored.

FIG. 5 shows a terminal response to a disconnection point and a failure investigation message in the failure investigation processing of FIG. FIG. 5A shows a disconnection point 30 of the signal lines SA and SB between the relay amplification board 7-1 and the relay amplification board 7-2. Here, addresses A1 to An are provided between the relay amplification boards 7-1 and 7-2.
N fire detectors 5 are connected, and the address A2
It is assumed that there is a disconnection point 30 between the address and the fire detector 5 at the address A3.

The relay amplification board 7-2 is connected to the disconnection point 30.
Performs a backup operation by detecting a signal line disconnection, and turns off the backup operation when a failure investigation message is sent from the disaster prevention receiver 1 as shown in FIG. Therefore, the addresses A3 to An connected to the downstream side of the disconnection point 30
Connection of the signal line to the fire detector 5 is disconnected, and the call from the disaster prevention receiver 1 cannot be received.

Then, when the terminal is called from the disaster prevention receiver 1 after transmitting the fault investigation message, the relay amplifiers 7-1 and 7 are called.
The response from the fire detector 5 connected between -2 is shown in FIG.
(B). That is, the fire detectors 5 at the addresses A1 and A2 connected to the relay amplification board 7-1 when viewed from the disconnection point 30 respond normally to the respective calls.

On the other hand, regarding the fire detectors 5 at addresses A3 to An connected to the relay amplifier panel 7-2 side as viewed from the disconnection point 30, the backup operation of the signal line in the relay amplifier panel 7-2 is turned off. As a result, the call signal cannot be received from the relay amplification board 7-1 and the response signal cannot be sent, and no response is made to each of the calls at the addresses A3 to An.

With respect to the confirmation storage including the non-responding terminal as shown in FIG. 5B, the fire detector 5 of the address A2 to which the call response has been made and the address of the address A3 to which there is no response to the call adjacent thereto are detected. The signal line SA between the fire detector 5 and
It can be specified that SB is the disconnection point 30. In addition, the terminal call of the disaster prevention receiver 1 may be performed by sequentially calling all the terminals connected to the lines 3a and 3b from the disaster prevention receiver side to identify the broken portion, or from the relay amplifier panel that has performed the backup operation. If the disconnection abnormality signal is received in advance, the area of the disconnected line can be known, and only the terminal in that area may be called. In FIG. 5, a relay amplifier 7-
If the disaster prevention receiver has previously received a message indicating that backup is being performed from step 2, the disconnection points are interrupted by the amplification boards 7-1 and 7-2.
Therefore, the disaster prevention receiver may call only terminals between the relay amplifiers 7-1 and 7-2.

FIG. 6 is a time chart of the fault investigation processing when the power line of the relay amplifier board is disconnected. In FIG. 6, the failure investigation switch 4 of the disaster prevention receiver 1 is set to step S
When the switch is turned on in step 1, a failure investigation message is transmitted in common to all the relay amplification boards 7-1 to 7-n in step S2.

Here, in the relay amplification panel 7-2 in FIG.
It is assumed that the power supply line SV of the detector line 3a and the upstream side of the common line SC are disconnected, and the power supply backup for the upstream power supply line is performed by closing the relay contacts a11 and a12 by the operation of the return relay A1.

When a fault investigation message is received from the disaster prevention receiver 1 in the power backup state for the upstream power line disconnection in the relay amplifier 7-2, the signal processor 8 thereof
Starts the failure investigation mode in step S101, turns off the return relay A1 in the ON state, thereby opening the relay contacts a11 and a12, and the power supply unit 16 for the broken upstream power supply line SV and the common line SC. Turn off backup by power supply from.

Subsequently, a timer is started in step S102. The set time of this timer is set to a predetermined time in consideration of the time from when the power supply voltage of the capacitor incorporated in the fire detector 5 connected to the disconnection side drops to the end and the operation stops. The capacitor is charged in advance to compensate for fluctuations in power supplied to the terminal. For this reason, upon recognizing the time over of the timer started in step S103, the fire detector 5 connected to the detector line 3a on the up side, which is disconnected at this time, loses its power by the built-in capacitor, and It is stopped by turning off.

When the determination of time over is completed in step S103, the failure investigation mode is terminated in step S104, the return relay A1 is turned on, and the relay contact a1
By closing 1, a12, the backup of the power supply to the broken up power supply line SV and the common line SC is restarted.

In response to the operation of the relay amplifier panel 7-2 in the failure investigation mode, in the fire detector 5 as a terminal, the power supply is stopped in step S201, and thereafter,
The power is turned off when the internal capacitor is completely discharged before the time is over in step S202, and when the return relay A1 is turned on following the end of the failure investigation mode in step S104, the power supply is started as in step S203. Become like

On the other hand, in the disaster prevention receiver 1 which has transmitted the trouble investigation message in step S2, terminal polling for the fire detector 5 as a terminal is repeated thereafter as in step S3. In response to the terminal polling after the power supply is started in step S203, the relay amplifier 7-2
The fire detector 5 receiving the power backup due to the disconnection from the terminal performs an initial response to the terminal polling after the power is turned on.

As an initial response to the terminal polling immediately after the power is turned on, specifically, a terminal device type response is performed. For example, in the case of the fire detector 5, a type code indicating a fire detector is returned.

On the other hand, in the case of the fire detector 5 as a terminal connected to the upstream side of the relay amplification board which does not perform the backup operation for the power supply line in response to the failure investigation message from the disaster prevention reception board 1, the system startup The initial response has already been completed at the time of raising, and a normal response is performed for the terminal polling in step S3.

For this reason, the terminal that has made the initial response in step S4 is confirmed and stored, and based on the result of the confirmation storage, the broken portion of the power supply line is specified and displayed in step S5. That is, it is specified and displayed that there is a disconnection between the terminal device of the normal response and the terminal device of the first initial response adjacent thereto.

FIG. 7 is an explanatory diagram of the location of the disconnection between the relay amplifiers and the terminal response to the failure investigation message in the failure investigation for the power supply line disconnection of FIG. FIG. 7A shows the power supply lines SV and SC between the relay amplification board 7-1 and the relay amplification board 7-2, where the fire detectors 5 of the addresses A1 to An are provided.
Are connected, and the power supply lines SV and SC between the address A2 and the address A3 are assumed to be the disconnection points 30.

For such a disconnection point 30 between the power supply lines SV and SC, a disconnection detection is performed in the relay amplification board 7-2, and a power backup is performed between the upstream power supply lines SV and SC up to the disconnection point 30. Is going.

Therefore, when the failure investigation message from the disaster prevention receiving board 1 is received by the relay amplification board 7-2 which performs the power backup, the power backup for the fire detector 5 of the address A3 to An up to the disconnection point 30 is performed. Off
Further, the backup is kept off until the capacitor built in the fire detector 5 is completely discharged by the setting of the timer, whereby the address A3 until the disconnection point 30 is reached.
-An fire detectors 5 are in a power-stop state.

Thereafter, the power backup is restarted by the termination of the failure investigation mode in the relay amplification board 7-2, and the fire detectors 5 of the addresses A3 to An once stopped receive the power supply again normally and restart the operation.

After the operation in the failure investigation mode in the relay amplifier board based on such a failure investigation message is completed, the address A between the relay amplifier boards 7-1 and 7-2 in FIG.
Looking at the calls to the fire detectors 1 to An and their responses, the addresses A1 and A2 are normal responses,
Addresses A3 to An are initial responses. Therefore, the fire detector 5 having the address A3 of the normal response and the address A serving as the initial response adjacent thereto are provided.
It can be specified that there is a disconnection point 30 between the third fire detector 5.

In the above embodiment, the failure investigation message is transmitted to all the relay amplification boards in common by turning on the failure investigation switch 4 provided in the disaster prevention receiver 1. The failure investigation message may be transmitted while designating the addresses of the relay amplification boards in order. In addition,
The inspection of the disconnection point of the power supply lines SV and SC may be performed by the inspection method of the disconnection point performed by the signal line in FIG. That is, when the backup of the power supply lines SV and SC is released and each terminal is called, a terminal that has not responded is detected, so that the disconnection location can be specified.

In the above embodiment, the relay and the relay contact are realized as the return contact of the backup circuit for the power supply line and the signal line. However, a semiconductor switch such as a transistor FET may be used.

The present invention includes appropriate modifications which do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments. Further, in the above-described embodiment, the failure investigation processing is performed by operating the failure investigation switch provided on the disaster prevention receiver. May be transmitted.

[0076]

As described above, according to the present invention, a failure investigation control signal is transmitted to a relay amplification panel by a switch operation or the like in a disaster prevention reception panel, and the relay amplification panel that receives the failure investigation control signal rises. If a disconnection fault has occurred in the side transmission path, the backup circuit is turned off for a certain period of time, and the fault status is output and responded from the terminal device, whereby the disconnection location can be specified in the disaster prevention receiver.

Therefore, even if a line break occurs in a line in a tunnel, the position of the line break can be specified by an instruction from the disaster prevention receiver without entering the tunnel. Compared to a method in which a person artificially disconnects a track to investigate a disconnection location, the time required to monitor for a disconnection can be reduced, and the backup circuit's OFF state associated with a fault investigation is automatically set. Therefore, it is possible to reliably avoid a situation in which the monitoring function is lost due to being left in the failure investigation state.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of the present invention.

FIG. 2 is a block diagram showing an embodiment of the disaster prevention receiver of FIG. 1;

FIG. 3 is a circuit block diagram showing an embodiment of the relay amplification board of FIG. 1;

FIG. 4 is a time chart of a failure investigation process for a signal line disconnection;

FIG. 5 is an explanatory diagram of a terminal response based on an investigation of a broken portion of a signal line and a failure.

FIG. 6 is a time chart of a failure investigation process for a power line disconnection;

FIG. 7 is an explanatory diagram of a terminal response based on a power line disconnection location and a fault investigation.

FIG. 8 is an explanatory diagram of tunnel disaster prevention equipment using an R-type transmission system.

[Explanation of symbols]

 1: Disaster prevention receiver 2a: Up tunnel transmission line 2b: Down tunnel transmission line 3a: Detector line 3b: Repeater line 5: Fire detector 6: Repeater 7-1 to 7-n: Relay amplifier 8: Signal Processing unit 9: Pump control panel 10-1, 10-2: Voltage drop detection circuit 12a, 12b, 14a, 14b: Voltage buffer amplifier 13a, 13b, 15a, 15b: Current buffer amplifier 17: Electric valve 18: Water spray head 16: Power supply unit 20: Main control unit 21: Transmission control unit 22: Tunnel 23: Operation display control unit 23a: Display unit 23b: Operation unit 23c: Sound unit 24: Monitoring unit 25: Fault investigation unit 26: Printer 27: Communication control unit 28: CRT

Claims (4)

[Claims] A terminal device such as a detector and a control device installed in a tunnel is connected to a transmission line including a power line and a signal line drawn from a disaster prevention receiver, and a relay amplifier is connected at predetermined intervals. In a tunnel disaster prevention facility that monitors and controls the inside of a tunnel by supplying power to a downstream transmission line that is a terminal side, each relay amplification panel detects the disconnection of an upstream transmission line that is a reception panel side in the relay amplification panel. A backup circuit is provided for backing up the power supply to the disconnected upstream transmission line and / or the signal transmission with the disaster prevention receiver. The disaster prevention receiver transmits a control signal for fault investigation to the relay amplification panel, and the transmission is performed. A tunnel characterized in that a backup operation for a road disconnection is temporarily canceled, and a failure investigation unit for specifying a disconnection location based on a response state of the terminal device is provided during the temporary release. Disaster facilities. 2. A terminal device such as a detector or a control device installed in a tunnel is connected to two sets of transmission lines including a power supply line and a signal line drawn from a disaster prevention receiver, and the relay amplifier is provided at predetermined intervals. In the tunnel disaster prevention equipment for monitoring and controlling the inside of the tunnel by supplying power to the downstream line on the terminal side, each relay amplifier panel disconnects the upstream power line on the receiver amplifier side to the relay amplifier panel. The power supply inside the panel is supplied to the upstream power supply line that has been disconnected by the closing of the folded contacts at the time of detection, and the signal line of the transmission line of another system is closed by closing the folded contacts when the disconnection of the signal line at the receiving side is detected. A backup circuit is provided to connect to the disconnected upstream signal line, and a control signal based on a fault investigation instruction operation is transmitted to the relay amplification panel to the disaster prevention receiver, and a backup for the signal line and / or power supply line is disconnected. Operation temporarily release the tunnel disaster prevention equipment, characterized in that a failure investigation unit for identifying a break point on the basis of the response state of the terminal device therebetween. 3. The tunnel disaster prevention equipment according to claim 1, wherein the backup circuit of the relay amplification panel receives a failure investigation control signal from the disaster prevention reception panel during a backup operation by detecting disconnection of a power supply line. The power supply backup for the disconnected power supply line is restarted after stopping for a predetermined time when the capacitor provided in the terminal device has finished discharging, and the fault investigation unit of the disaster prevention receiver receives the power supply backup operation in the relay amplifier panel. By sequentially calling the terminal devices after the terminal device has been restarted, the terminal device that has received the normal response signal and the adjacent terminal device that has received the initial response signal immediately after power-on are specified as a disconnection point. Tunnel disaster prevention equipment. 4. The tunnel disaster prevention equipment according to claim 1, wherein the backup circuit of the relay amplification panel receives a failure investigation control signal from the disaster prevention reception panel during a backup operation by detecting disconnection of a signal line. The backup operation for the disconnected signal line is stopped and restarted until a recovery control signal is received, and the failure investigation unit of the disaster prevention receiving board sequentially stops the terminal device during the suspension of the backup operation of the relay amplification board. call,
Disaster prevention equipment for tunnels, wherein a terminal between a terminal device that has received a response signal and an adjacent terminal device that has not responded is identified as a disconnection point.