Disaster prevention system

Abstract

To provide a disaster prevention system that transmits, to a remote higher-order facility, data of the history of current monitoring storing a result of determination of an abnormality in the value of current flowing in a signal line and a result of measurement of the current value, and thereby allows checking the data of the history of current monitoring in the higher-order facility.SOLUTION: A disaster prevention system comprises: a disaster prevention receiving panel 10; a terminal instrument including a manual reporting device 24 that, when a fire is started, outputs a fire reporting signal to the disaster prevention receiving panel 10 through a signal line; and a current monitoring unit 70 that measures the value of current flowing in a current line flowing in the signal line and determines a current value abnormality based on a result of the measurement, and stores history data of the result of the measurement and a result of the determination in a memory card 100. When the current monitoring unit 70 receives a transmission request from a current monitoring higher-order station facility 78 connected via a general-purpose external communication network 76, it extracts at least the result of the determination of the current value abnormality in the signal line from the history data stored in the memory card 100, and transmits it to the current monitoring higher-order station facility 78.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a disaster prevention system that monitors abnormalities within a monitored area by connecting terminal devices such as reporting devices and detectors installed within the monitored area to a disaster prevention receiving panel. [Background technology]

[0002] 2. Description of the Related Art Conventionally, tunnel emergency equipment is installed in tunnels, such as those on expressways, which serve as monitored areas, in order to construct a tunnel disaster prevention system that protects people and vehicles from fire accidents that occur within the tunnel.

[0003] The terminal equipment for such tunnel emergency facilities includes fire detectors for detecting and announcing fires, manual reporting devices and emergency telephones for reporting fires, fire hydrant activation devices for extinguishing fires and preventing the spread of fires, automatic valve devices for water spray equipment that spray fire-fighting water from water spray heads to protect the tunnel body and ducts from fires, duct temperature detectors, etc., and a disaster prevention receiving panel that monitors and controls the terminal equipment for these emergency facilities is installed in the tunnel electrical room.

[0004] Tunnel emergency equipment equipped with disaster prevention receiving panels and terminal devices can be broadly divided into R-type transmission systems and P-type direct transmission systems. The R-type transmission system connects terminal devices such as fire detectors with addresses set to the transmission line, enabling individual management by operating and controlling each terminal device through transmission control. The P-type direct transmission system divides the terminal devices into predetermined section units according to their type, etc., connects multiple terminal devices belonging to the same section to the signal lines drawn out for each section, and operates and controls each signal line unit.

[0005] In a P-type direct transmission tunnel disaster prevention system, the terminal devices, such as manual notification devices, fire hydrant activation devices, and duct temperature detectors, are configured with no-voltage a-contact switches as their operation or detection signal output sections, and the no-voltage a-contact switches are connected to the signal lines drawn from the disaster prevention receiving panel. Furthermore, the no-voltage a-contact switches are normally off in the monitoring state, and the terminal devices turn on the no-voltage a-contact switches in response to operation or detection, outputting no-voltage contact signals. A terminating resistor is connected to the end of the signal line to monitor for disconnections.

[0006] The disaster prevention receiving panel applies power supply voltage to the signal line of the signal line between the signal line and the common line via a pull-up resistor, and in the normal monitoring state with the no-voltage a-contact switch off, a weak current for monitoring disconnection determined by the terminating resistor flows in the signal line, but the voltage between the signal line and the common line of the signal line as seen from the disaster prevention receiving panel is maintained at approximately the power supply voltage. Also, when the no-voltage a-contact switch of the terminal device is turned on by operation or detection action and a no-voltage contact signal is output, a current exceeding a predetermined value flows in the signal line, and the voltage between the signal line and the common line of the signal line as seen from the disaster prevention receiving panel drops to approximately zero volts. The disaster prevention receiving panel detects the reception of a no-voltage contact signal from an increase in current consumption in the signal line or a drop in voltage between the signal line and the common line of the signal line and performs the specified control based on the no-voltage contact signal sent.

[0007] For example, if a fire notification signal is received from a manual notification device, the disaster prevention receiving panel will perform controls such as displaying a fire, controlling the lighting of the response lamp on the manual notification device, and displaying the manual notification area, and will also transmit the fire notification signal to external equipment such as remote monitoring and control equipment, television monitoring equipment, warning display board equipment, ventilation equipment, and lighting equipment to perform the specified controls.

[0008] In such conventional P-type direct transmission tunnel disaster prevention systems, if insulation deterioration progresses due to aging or other factors in the signal line (wiring cable) connecting the terminal equipment, a current greater than expected will flow through the signal line connecting the terminal equipment under normal monitoring conditions, and the disaster prevention receiving panel will mistakenly detect this as a no-voltage contact signal due to the operation or detection action of the terminal equipment and perform the required control, and in conjunction with this, will cause other equipment such as remote monitoring and control equipment, television monitoring equipment, warning display board equipment, ventilation equipment, and lighting equipment to perform the required control, which often results in the tunnel being closed to traffic.

[0009] To solve this problem, a current monitoring device is installed in the same housing as the disaster prevention receiving panel installed in the tunnel electrical room or in a separate housing. The current monitoring device measures the current flowing through the signal line to which the terminal equipment is connected at a predetermined time, for example once a day, and stores the current measurement results. If the measured current exceeds a predetermined threshold, for example, the device determines that the current value of the signal line is abnormal and stores the determination result. Furthermore, the disaster prevention receiving panel issues an alarm about the abnormal current value of the signal line (Patent Document 1). [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 2018-032114 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-246962 [Patent Document 3] Japanese Patent Application Publication No. 11-128381 Summary of the Invention [Problem to be solved by the invention]

[0011] In a tunnel disaster prevention system equipped with a current monitoring device, staff are stationed at the tunnel equipment in day and night shifts, or they make regular rounds, for example, once a day, to the tunnel electrical room to check whether or not an alarm has been issued based on the current value abnormality determined by the current monitoring device, and even if no current value abnormality has been determined, they perform daily tasks such as displaying the historical data of the current value measurement results from the previous day on the monitor screen to check the current value measurement results.

[0012] However, depending on weather conditions such as snowfall or wind and flood damage, it is expected that it will be difficult to rotate or regularly patrol the tunnel-side facilities, which are often located in mountainous areas, and it may be impossible to visit the tunnel electrical room, making it impossible to deal with abnormal current values ​​detected by the current monitoring device or to check the historical data of current measurement results. This situation will occur for a long period of time in winter, particularly in tunnels in snowy areas.

[0013] The present invention aims to provide a disaster prevention system that transmits current monitoring history data, which stores the results of determining abnormalities in the current value flowing through a signal line and the results of measuring the current value, to a remote higher-level facility, allowing the higher-level facility to check the current monitoring history data. [Means for solving the problem]

[0014] (Disaster prevention system) The present invention provides Disaster prevention receiving panel, a terminal device that outputs a predetermined signal regarding the abnormality to the disaster prevention receiving panel via a signal line when an abnormality occurs; a current monitoring unit that measures a current value flowing through a signal line and stores history data of the measurement results, and determines whether a current value is abnormal based on the current value measurement results and stores history data of the determination results; A disaster prevention system provided with: The current monitoring unit is characterized in that, when it receives a transmission request from a higher-level equipment connected via a specified communication network, it extracts from the stored history data the determination result of the current value abnormality of at least the signal line that has been determined to have an abnormal current value and transmits it to the higher-level equipment.

[0015] (Transmission of measurement results to higher-level equipment) When a transmission request is received from the higher-level equipment, the current monitoring unit extracts the measurement result of the current value of the signal line from the stored history data and transmits it to the remote monitoring and control equipment.

[0016] (Sending history data in response to narrowing requests to higher-level equipment) The current monitoring unit extracts the results of the determination of abnormal current values ​​of the signal line and / or the results of measurement of the current values ​​according to the specified narrowing conditions included in the transmission request from the higher-level equipment from the stored history data and transmits them to the higher-level equipment.

[0017] (Automatic measurement, all specified measurement, or selected specified measurement) The current monitoring unit At a predetermined timing, the current values ​​flowing through all the signal lines are measured to determine whether each current value is abnormal, and history data of the measurement results of the current values ​​and the determination results of the current value abnormality for each of the signal lines is stored; or When a predetermined all-designated measurement operation that designates all signal lines is detected at any timing, the current values ​​flowing through all signal lines are measured to determine whether each current value is abnormal, and history data of the measurement results of the current values ​​of all signal lines and the determination results of the current value abnormality are stored, or When a predetermined selection and designation measurement operation is detected in which one or more signal lines are selected and designated at an arbitrary timing, the current value flowing through each of the selected and designated signal lines is measured, and an abnormality in each current value is determined, and history data of the measurement results of the current value of each of the selected and designated signal lines and the determination results of the abnormality in the current value are stored.

[0018] (Communication network connecting the current monitoring unit and higher-level equipment) The current monitoring unit stores the history data in an electronic recording medium equipped with a communication function, When a transmission request is received from a higher-level facility connected via a communication network, the history data stored in the electronic recording medium is read out and transmitted to the higher-level facility.

[0019] (Configuration for measuring the current value of a signal line) The current monitoring unit includes a pair of current input terminals for inputting a current flowing through the signal line; When measuring a current value, a measurement line switching unit is provided that switches the connection of the pair of current input terminals from a state where they are not inserted in the line of the signal line to a state where they are inserted.

[0020] (Current monitoring unit that measures the current value of each signal line) The measurement line switching unit is provided for each signal line, When measuring a current value, a measurement line switching unit provided on the signal line for measuring the current value switches the connection so that a pair of current input terminals are inserted into the line of the signal line for measuring the current value, and the current monitoring unit measures the current value flowing in each of the signal lines to be measured.

[0021] (Switching of the signal line to be measured by relay) The measurement line switching unit is A relay having a first changeover relay contact and a second changeover relay contact that are activated when energized is provided for each signal line, When the relay is not activated, the first changeover relay contact at the insertion portion of the pair of current input terminals connects the upstream side and downstream side of the signal line, and the second changeover relay contact cuts off the connection between the upstream side of the signal line and one of the pair of current input terminals of the current monitoring unit, thereby not inserting the current monitoring unit into the signal line, When the relay is activated, the first switching relay contact at the insertion portion of the pair of current input terminals connects the downstream side of the signal line to the other of the pair of current input terminals of the current monitoring unit, and the second switching relay contact connects the upstream side of the signal line to one of the pair of current input terminals of the current monitoring unit, thereby inserting the current monitoring unit into the signal line. [Effects of the Invention]

[0022] (Basic effect) The present invention is a disaster prevention system provided with a disaster prevention receiving panel, a terminal device that outputs a predetermined signal related to the abnormality to the disaster prevention receiving panel via a signal line when an abnormality occurs, and a current monitoring unit that measures the current value flowing in the signal line and stores history data of the measurement results, as well as determining whether the current value is abnormal and stores history data of the determination results. When the current monitoring unit receives a transmission request from a higher-level facility connected via a predetermined communication network, it extracts from the stored history data the determination result of at least the current value abnormality of the signal line that has been determined to be an abnormal current value and transmits it to the higher-level facility. Therefore, in a situation where it is difficult to rotate or make regular patrols because an attendant is stationed at the facility on the tunnel side, which is the monitoring area, a transmission request can be made from the higher-level facility, and the determination result of the current value abnormality stored in the current monitoring unit can be obtained from the history data without going to the facility on the tunnel side. For example, the result can be displayed on a screen on the higher-level facility side, making it possible to simply and easily check and deal with signal lines that have deteriorated over time.

[0023] (Effect of sending measurement results to higher-level equipment) Furthermore, when the current monitoring unit receives a transmission request from the higher-level equipment, it extracts the measurement results of the current value from the stored history data and transmits them to the higher-level equipment. Therefore, for a signal line determined to have an abnormal current value, it is possible to know the progress of deterioration over time from changes in the current value up to that point, for example, by displaying and examining the history of past current values ​​on the higher-level equipment side without having to go to the equipment on the monitoring area side, and to take appropriate measures against deterioration over time.

[0024] (Effect of sending historical data in response to narrowing requests to higher-level equipment) In addition, the current monitoring unit extracts from the stored history data the results of the judgment of abnormal current values ​​of the signal line and / or the results of the measurement of the current values ​​according to the specified narrowing down conditions included in the transmission request from the higher-level equipment, and transmits them to the higher-level equipment.Therefore, in the case of a tunnel disaster prevention system, for example, by specifying the systems corresponding to the up-line tunnel and the down-line tunnel, terminal devices such as manual reporting devices, fire hydrant activation devices, duct temperature detectors, and even section numbers as narrowing down conditions, the higher-level equipment can extract and transmit the specific judgment results of abnormal current values ​​or the measurement results of the current values ​​that it needs from the vast amount of history data, making it possible to efficiently judge the line degradation state, etc., for a specific signal line.

[0025] (Effects of automatic measurement, all designated measurement, or selective designated measurement) The current monitoring unit measures the current values ​​flowing through all the signal lines at a predetermined timing and determines whether each current value is abnormal, and stores history data of the measurement results of the current values ​​of all the signal lines and the determination results of the current value abnormality, or, when a predetermined all-designated measurement operation that designates all the signal lines at an arbitrary timing is detected, measures the current values ​​flowing through all the signal lines and determines whether each current value is abnormal, and stores history data of the measurement results of the current values ​​of all the signal lines and the determination results of the current value abnormality, or, when a predetermined selectively designated measurement operation that selects and designates one or more signal lines at an arbitrary timing is detected, When an operation is detected, the current value flowing through each of the selected and specified signal lines is measured to determine whether each current value is abnormal, and history data of the measurement results of the current value of the selected and specified signal line and the determination results of whether the current value is abnormal is stored.Therefore, normally, the current value of the signal line is measured at a predetermined timing, for example once a day, and the measurement results of the current value and the determination results of whether the current value is abnormal are stored as history data, making the stored history data available to remote higher-level equipment, and enabling the higher-level equipment to efficiently monitor the deterioration of the signal lines over time during operation.

[0026] Furthermore, even when performing a full-specified measurement in which all signal lines are specified, or a selective-specified measurement in which one or more signal lines are selected, the historical data can be made available not only to the equipment in the monitoring area, but also to distant higher-level equipment, making it possible to efficiently monitor signal lines in which specified signals related to abnormalities are received, or to check the progress of insulation deterioration in signal lines in which faults are detected, even on the higher-level equipment side.

[0027] (Effect of the communication network connecting the current monitoring unit and higher-level equipment) In addition, the current monitoring unit stores historical data on an electronic recording medium equipped with a communication function, and when a transmission request is received from a higher-level equipment connected via a communication network, the historical data stored on the electronic recording medium is read out and transmitted to the higher-level equipment. This makes it possible to simply and easily establish a communication connection between the current monitoring unit and the higher-level equipment via a general-purpose communication network such as a LAN communication network, the Internet, or a mobile phone network, and to simply and easily transmit current monitoring historical data from the equipment in the monitoring area to the higher-level equipment in response to a transmission request from the higher-level equipment.

[0028] The effect of using a general-purpose communication network can be explained by comparing it with conventional disaster prevention systems that use dedicated communication networks as follows: Conventionally, for tunnel disaster prevention systems, remote monitoring and control equipment has been installed, and it is thought that a communication network dedicated to this remote monitoring and control equipment would be used to transmit historical current monitoring data from the current monitoring device to higher-level equipment equipped in the remote monitoring and control equipment installed in a location such as the road management room of a road information system, away from the tunnel.

[0029] Here, the remote monitoring and control equipment is a device that oversees the monitoring and control of the operation of power-related equipment (power distribution equipment, private power generation equipment, ventilation equipment, lighting equipment, etc.) and emergency tunnel equipment installed in each tunnel. IG substation equipment (intelligent substation equipment) is installed on the side of each tunnel that is the subject of monitoring and control, and each IG substation equipment is connected to the upper station equipment installed as the higher-level equipment via a dedicated communication network (dedicated data transmission line network).

[0030] In addition, monitoring and control of the operation of emergency equipment in tunnels using remote monitoring and control equipment involves connecting a disaster prevention receiving panel to the IG substation equipment, transmitting the processing results from monitoring by the disaster prevention receiving panel installed in each tunnel to the higher-level station equipment via the IG substation equipment, and inputting the control signal transmitted from the higher-level station equipment into the disaster prevention receiving panel via the IG substation equipment to perform control corresponding to the disaster prevention receiving panel installed in each tunnel.

[0031] However, in order to transmit historical current monitoring data from the current monitoring device to the higher-level equipment using a conventional communication network dedicated to remote monitoring and control equipment, it is necessary to either provide the current monitoring device and IG sub-station equipment installed on the tunnel side with a new file transfer function for transmitting the historical current monitoring data stored in the current monitoring device, or to integrate the current monitoring device with a disaster prevention receiving panel. This requires significant modifications to the equipment on the tunnel side, and also requires a review of the data transmission method between the higher-level equipment and multiple IG sub-station equipment, which is constructed as a communication network dedicated to remote monitoring and control equipment, so that historical current monitoring data can be transmitted. This requires considerable effort, time, and cost, making it difficult to put into practical use.

[0032] On the other hand, when using a general-purpose communication network such as a LAN communication network, the Internet, or a mobile phone network, by using an electronic recording medium with communication functions compatible with these general-purpose communication networks, such as a memory card equipped with wireless LAN, and storing the current monitoring history data on the electronic recording medium, it is possible to send the current monitoring history data from the current monitoring device to the higher-level equipment with a simple configuration without affecting the remote monitoring and control equipment using a dedicated communication network.

[0033] (Effect of measuring the current value of the signal line) In addition, the current monitoring unit has a pair of current input terminals that input the current flowing in the signal line, and is provided with a measurement line switching unit that switches the connection of the pair of current input terminals from a state where they are not inserted in the signal line line to a state where they are inserted when measuring the current value.Therefore, when the current monitoring unit measures the current value, the current monitoring unit is inserted in the signal line line, and when the current monitoring unit is not measuring the current value, the current monitoring unit is in a disconnected state from the signal line, making it possible for the current monitoring unit to monitor the current in the signal line without interfering with normal monitoring by the disaster prevention receiving panel via the signal line.

[0034] (Effect of the current monitoring unit that measures the current value of each signal line) A measurement line switching unit is provided for each signal line, and when measuring a current value, the measurement line switching unit provided on the signal line for which the current value is to be measured switches the connection so that a pair of current input terminals are inserted into the line of the signal line for which the current value is to be measured, and the current monitoring unit measures the current value flowing in each of the signal lines to be measured.This means that a single current monitoring unit can measure the current values ​​of multiple signal lines, which simplifies the circuit configuration and enables cost reduction compared to when a current detection unit is provided for each signal line.

[0035] (Effect of switching the signal line to be measured using a relay) Furthermore, the measurement line switching unit is provided with a relay having a first changeover relay contact and a second changeover relay contact that are activated by energization for each signal line, and when the relay is not activated, the first changeover relay contact connects the upstream and downstream sides of the signal line at the interposition portion of the pair of current input terminals, and the second changeover relay contact cuts off the connection between the upstream side of the signal line and one of the pair of current input terminals of the current monitoring unit, thereby not inserting the current monitoring unit into the signal line, and when the relay is activated, the first changeover relay contact at the interposition portion of the pair of current input terminals connects the downstream side of the signal line to the current The first and second switching relay contacts are connected to the other of the pair of current input terminals of the monitoring unit, and the second switching relay contact connects the upstream side of the line of the signal line to one of the pair of current input terminals of the current monitoring unit, thereby inserting the current monitoring unit into the line of the signal line.Therefore, when measuring the current value of the signal line, the relay provided in the signal line to be measured is energized to operate it, thereby switching the first and second switching relay contacts, thereby connecting the pair of current input terminals to a state where they are inserted into the line of the signal line to be measured, and the current value flowing in each signal line can be measured by the current monitoring unit. [Brief explanation of the drawings]

[0036] [Figure 1] 1 is an explanatory diagram showing an outline of the configuration of a tunnel disaster prevention system. [Figure 2] FIG. 10 is an explanatory diagram showing an embodiment of a current monitoring function of the disaster prevention receiving panel. [Figure 3] FIG. 10 is an explanatory diagram showing an all designated measurement screen displayed on the sub-monitor device. [Figure 4] FIG. 10 is an explanatory diagram showing a selection designation measurement screen displayed on the sub-monitor device. [Figure 5] 10 is a flowchart showing current monitoring control by a current monitoring unit of the disaster prevention receiving panel. [Figure 6] FIG. 10 is an explanatory diagram showing the current monitoring function of the disaster prevention receiving panel using a dedicated external communication network. DETAILED DESCRIPTION OF THE INVENTION

[0037] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a disaster prevention system according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the following embodiment.

[0038] [Basic concept of the embodiment] First, the basic concept of the embodiment will be described. This embodiment relates to a disaster prevention system that monitors abnormalities in a monitored area by connecting terminal devices installed in the monitored area to a disaster prevention receiving panel. Here, the term "monitored area" refers to an area, range, space within a structure, etc. that is the target of monitoring for abnormalities, and specifically refers to a space within a tunnel, etc. Furthermore, a "tunnel" refers to a tunnel that has a road through which vehicles pass, such as an expressway or a tollway.

[0039] The disaster prevention system of this embodiment also includes a disaster prevention receiving panel, terminal equipment, and a current monitoring unit.

[0040] Here, a "disaster prevention receiving panel" is a device that mainly manages or controls the terminal devices connected to it, and is a concept that includes devices called disaster prevention receivers, disaster prevention monitoring panels, central monitoring panels, etc.

[0041] Furthermore, "terminal equipment" refers to equipment that is managed or controlled by a disaster prevention receiving panel, and that outputs a specified signal regarding an abnormality to the disaster prevention receiving panel via a signal line when an abnormality occurs. The "terminal equipment" covered by this embodiment is, for example, equipment that has a no-voltage a-contact switch that closes the contacts when operated or detected in response to a fire, and specifically, the concept includes manual reporting devices, fire extinguishing activation devices, duct temperature detectors, etc. that are installed as emergency equipment for tunnels.

[0042] Here, a "signal line" refers to wiring that connects a disaster prevention receiving panel to a terminal device, enabling the disaster prevention receiving panel to manage or control electrical equipment, and includes, for example, a wiring cable formed by a pair of signal lines and a common line.

[0043] The "current monitoring unit" measures the current value flowing in the signal line between the disaster prevention receiving panel and the terminal device, stores historical data of the measurement results, determines whether the current value is abnormal based on the current value measurement results, stores historical data of the determination results, and, when a transmission request is received from a higher-level equipment connected via a specified communication network, extracts at least the determination result of the current value abnormality in the signal line from the stored historical data and transmits it to the higher-level equipment.

[0044] Here, "historical data of the measurement results of the current value" refers to data including the measured current value of the signal line, and may be historical data including data other than the current value, and "historical data of the determination results of the current value abnormality" refers to data indicating whether the measured signal line had an abnormal current value, and may be historical data including data other than data indicating the current value abnormality.

[0045] In addition, the "communication network" is a communication network for connecting the current monitoring unit installed on the monitoring area side with a higher-level equipment located far away from the monitoring area, and is capable of receiving a transmission request from the higher-level equipment, extracting the result of the determination of an abnormal current value from the historical data stored in the current monitoring unit, and transmitting it.

[0046] The configuration and type of communication network is optional, but includes general-purpose communication networks such as LAN communication networks, the Internet or mobile phone networks, and dedicated communication networks for disaster prevention systems. A "general-purpose communication network" is one that enables communication connections between devices and equipment owned by an unspecified number of users using IDs and passwords obtained through contracts with communication carriers, and includes "public communication networks," "mass communication networks," and "open communication networks."

[0047] In contrast, a "dedicated communications network" is a communications network in which the communications carrier and users are limited to a specific business entity, and includes, for example, an intranet known as a communications network exclusively used within a business entity. Specifically, in the case of a conventional tunnel disaster prevention system, this would be the communications network used for remote monitoring and control equipment (the data transmission line network connecting the slave station on the disaster prevention receiving panel side with the master station of the higher-level equipment).

[0048] In addition, when receiving a transmission request from the upper equipment, the current monitoring unit may extract the measurement results of the current value of the signal line from the stored history data and transmit them to the upper equipment, or may extract the judgment results of the current value abnormality of the signal line and / or the measurement results of the current value according to predetermined filtering conditions included in the transmission request from the upper equipment from the stored history data and transmit them to the upper equipment.

[0049] Here, the "predetermined narrowing down conditions" and their types are arbitrary, but include, for example, conditions that target the results of determining abnormal current values ​​and / or the results of measuring current values ​​for a specified signal line, conditions that target the results of determining abnormal current values ​​and / or the results of measuring current values ​​for a specified period, etc. Specifically, in the case of a tunnel disaster prevention system, the narrowing down conditions include systems corresponding to the up-line tunnel and the down-line tunnel, terminal equipment such as manual reporting devices, fire hydrant activation devices, and duct temperature detectors, as well as section numbers, etc.

[0050] The current monitoring unit may also perform automatic measurement, all-designated measurement, and selectively designated measurement. "Automatic measurement" refers to measuring the current value flowing through each of all signal lines at a predetermined timing, determining whether each current value is abnormal, and storing history data of the measurement results of the current value and the determination results of the current value abnormality for each of all signal lines. "All-designated measurement" refers to measuring the current value flowing through each of all signal lines when a predetermined all-designated measurement operation that designates all signal lines is detected at a desired timing, determining whether each current value is abnormal for each of the signal lines, and storing history data of the measurement results of the current value and the determination results of the current value abnormality for each of the signal lines. "Selectively designated measurement" refers to measuring the current value flowing through each of the selected and designated signal lines when a predetermined selectively designated measurement operation that selects and designates one or more signal lines is detected at a desired timing, determining whether each current value is abnormal for each of the selected and designated signal lines, and storing history data of the measurement results of the current value and the determination results of the current value abnormality for each of the selected and designated signal lines.

[0051] Furthermore, the "predetermined timing" in automatic measurement is arbitrary, but includes periodic measurements such as once a day. Furthermore, the "all-designated measurement operation" in all-designated measurement and the "selective designated measurement operation" in selective designated measurement can be performed at any location, including operation at the current monitoring unit, operation at the disaster prevention receiving panel, operation at higher-level equipment, etc.

[0052] The current monitoring unit may also store the history data in an electronic recording medium with a communication function, and upon receiving a transmission request from a higher-level device connected via a communication network, read out the history data stored in the electronic recording medium and transmit it to the higher-level device. Here, the "electronic recording medium with a communication function" may be any electronic recording medium that has a communication function compatible with the communication standard used in the communication network for connecting to the higher-level device and is capable of storing history data, and includes, for example, a memory card equipped with a wireless LAN.

[0053] The current monitoring unit may also include a pair of current input terminals for inputting the current flowing through the signal line, and a measurement line switching unit may be provided for switching the connection of the pair of current input terminals from a state where they are not inserted into the signal line to a state where they are inserted when measuring the current value. Here, the "current input terminals" refer to input units for the current monitoring unit when they are connected by the measurement line switching unit to a state where they are inserted into the signal line. The "measurement line switching unit" also includes circuits equipped with various switches for switching wiring connections or for switching between connection and non-connection, such as circuits equipped with relays.

[0054] Furthermore, a measurement line switching unit may be provided for each signal line, and when measuring a current value, the measurement line switching unit provided on the signal line for which the current value is to be measured switches the connection so that a pair of current input terminals are inserted into the line of the signal line for which the current value is to be measured, and the current monitoring unit measures the current value flowing in each of the signal lines to be measured.

[0055] The measurement line switching unit may also be provided with a relay for each signal line, the relay having first and second switching relay contacts that are activated when current is applied, and when the relay is inactive, the first switching relay contact at the insertion portion of the pair of current input terminals connects the upstream and downstream sides of the signal line, and the second switching relay contact disconnects the upstream side of the signal line from one of the pair of current input terminals of the current monitoring unit, thereby not inserting the current monitoring unit into the signal line, and when the relay is activated, the first switching relay contact at the insertion portion of the pair of current input terminals connects the downstream side of the signal line to the other of the pair of current input terminals of the current monitoring unit, and the second switching relay contact connects the upstream side of the signal line to one of the pair of current input terminals of the current monitoring unit, thereby inserting the current monitoring unit into the signal line. Here, the "switching relay contact" of the relay includes a switching point of wiring that switches wiring connection or switches between connection and disconnection.

[0056] In the specific embodiment described below, the "disaster prevention system" is "a tunnel disaster prevention system that connects terminal equipment installed inside a tunnel to a disaster prevention receiving panel to monitor fires inside the tunnel," the "current monitoring unit" is "integrated into the disaster prevention receiving panel," the "terminal equipment" is "a manual reporting device and a fire pump starting device equipped with a no-voltage a-contact switch," the "communication network" that connects the current monitoring unit to the higher-level equipment is "a general-purpose external communication network that combines wireless LAN and a mobile phone network" or "a dedicated external communication network that connects the higher-level equipment of the remote monitoring and control equipment to the IG substation equipment," and the "measurement line switching unit" is "a relay circuit provided with a relay equipped with two switching relay contacts for each signal line."

[0057] [Specific details of the embodiment] The tunnel disaster prevention system will be explained in more detail below. a. Overview of the tunnel disaster prevention system b. Disaster prevention receiving panel b1.Configuration of the disaster prevention receiving panel b2. Monitoring and control of disaster prevention receiving panel c. Current monitoring of disaster prevention receiving panel c1. Overview of signal line current monitoring c2. Signal line c3.Current monitoring section c4. Measurement line switching unit c5. Automatic measurement of current value c6. All specified measurements of current values c7.Selective measurement of current value c8.Memory card with communication function d. General-purpose external communication network e. Control operation of current monitoring unit f. Tunnel disaster prevention system using a dedicated external communication network g. Modifications of the present invention

[0058] [a. Overview of the tunnel disaster prevention system] The tunnel disaster prevention system will now be explained in more detail with reference to Figure 1, which shows the outline of the tunnel disaster prevention system configuration.

[0059] As shown in Figure 1, the tunnel emergency equipment comprises a disaster prevention receiving panel 10 and terminal equipment groups 18 (18-1) to 18 (18-n), 20 (20-1) to 20 (20-n). From the disaster prevention receiving panel 10 installed in the tunnel electrical room, P-type signal lines 14, 16 are drawn out for each of the terminal equipment groups 18 (18-1) to 18 (18-n), 20 (20-1) to 20 (20-n) of the tunnel emergency equipment, which are installed in sections at a predetermined distance in the direction of vehicle travel for the up-line tunnel 12 (12-1) and the down-line tunnel 12 (12-2), which are constructed as tunnels for an expressway. Terminal equipment belonging to the terminal equipment groups 18 (18-1) to 18 (18-n), 20 (20-1) to 20 (20-n) are connected to each signal line 14, 16. In this embodiment, the P-type signal lines 14 and 16 use a wiring cable made up of a signal line and a common line.

[0060] The terminal equipment of the tunnel emergency equipment is, for example, a group of manual notification devices 24 and fire pump start-up devices 26 installed on four fire hydrant devices 22, as shown representatively in terminal equipment group 18 (18-1), with the manual notification devices 24 connected to signal line 14 and the fire pump start-up devices 26 connected to signal line 16.

[0061] Here, since the installation intervals of the fire hydrant devices 22 are, for example, 50 meters, each section of the terminal device groups 18 (18-1) to 18 (18-n) and 20 (20-1) to 20 (20-n), each including four fire hydrant devices 22, is approximately 200 meters long.

[0062] The manual reporting device 24 is provided on the electrical door of the fire hydrant device 22 together with a red indicator light and a response lamp, and is equipped with a no-voltage a-contact switch that is turned on by operating a push button, and when a road user operates the push button in the event of a fire, the no-voltage a-contact switch is turned on and a line current flows in the signal line 14 to which the operated manual reporting device 24 is connected, thereby transmitting a fire reporting signal to the disaster prevention receiving panel 10. Upon receiving the fire reporting signal from the manual reporting device 24, the disaster prevention receiving panel 10 outputs a fire alarm and transmits a response signal to the fire hydrant device 22, causing the red indicator lights of the four fire hydrant devices 22 in the section belonging to the same terminal equipment group to flash and the response lamps to light up.

[0063] The fire pump starting device 26 is equipped with a no-voltage a-contact switch that is turned on when the pump start button provided on the fire hydrant device 22 is pressed. When a firefighter opens the maintenance door of the fire hydrant device 22 and presses the pump start button, the no-voltage a-contact switch is turned on and a line current flows through the signal line 16 to which the operated fire pump starting device 26 is connected, thereby transmitting a pump start signal to the disaster prevention receiving panel 10. The disaster prevention receiving panel 10, which receives the pump start signal from the fire pump starting device 26, starts the fire pump equipment 54 and supplies fire water under pressure. The part that constitutes the no-voltage a-contact switch that is turned on when the pump start button of the fire pump starting device 26 is pressed is sometimes called the "fire pump start switch."

[0064] The fire pump starting device 26 also has another no-voltage a-contact switch that turns on and off in conjunction with the opening and closing of the hydrant valve opening / closing lever on the hydrant device 22. This no-voltage a-contact switch is connected in parallel to the no-voltage a-contact switch that turns on when the pump start button is pressed. In the event of a fire, when a user opens the hydrant door of the hydrant device 22, pulls out the hose with the nozzle, and pressurizes the hydrant valve opening / closing lever to start discharging water, the other no-voltage a-contact switch turns on, causing a line current to flow through the signal line 16 to which the operated fire pump starting device 26 is connected. This sends a pump start signal to the disaster prevention receiving panel 10, which then starts the fire pump equipment 54 and supplies pressurized fire water, just as if the pump start button had been pressed. The part of the fire pump starting device 26 that is composed of the no-voltage a-contact switch that turns on and off when the hydrant valve opening / closing lever is pressed is sometimes called the "fire pump start interlocking device" or "fire pump start interlocking switch."

[0065] The terminal equipment for the tunnel emergency facilities includes a manual notification device 24 for the fire hydrant device 22 and a fire pump starter 26, as well as a fire detector, an automatic valve device, an in-duct temperature detector, etc., which are not shown in the figure.

[0066] Fire detectors are installed along the walls in the direction of vehicle travel, for example at intervals of 25 or 50 meters, and a monitoring area is set on both sides of the vehicle's direction of travel, within 25 or 50 meters.If flames caused by a fire in the monitoring area are detected, a fire alarm is sounded.

[0067] The automatic valve device is equipped with water spray equipment, and opens the main valve by remotely controlling the opening via a signal line of the operating electric valve. Fire-extinguishing water is sprayed from multiple water spray heads installed on the top of the tunnel wall in the direction of vehicle travel to protect the tunnel body from fire.

[0068] The duct temperature detector is installed in a duct containing pipes and cables inside the guard passageway along the tunnel wall, and detects a rise in temperature inside the duct due to a cable fire or the like, and transmits a temperature detection signal to the disaster prevention receiving panel 10 by turning on the no-voltage A contact switch.

[0069] In addition to the emergency tunnel equipment, the equipment installed on the tunnel side includes IG remote station equipment 42, ventilation equipment 44, warning display board equipment 46, radio rebroadcasting equipment 48, television monitoring equipment 50, lighting equipment 52, fire pump equipment 54, and duct cooling pump equipment 56.

[0070] Here, except for the IG slave station equipment 42, which is connected via a data transmission line, all other equipment is individually connected to the disaster prevention receiving panel 10 via P-type signal lines. The IG slave station equipment 42 also constitutes part of the remote monitoring and control equipment 60, which connects the disaster prevention receiving panel 10 via a dedicated external communication network 58 to a higher-level station equipment 62 installed remotely outside the tunnel.

[0071] The ventilation system 44 is a system that energizes the air in the tunnel by blowing out high-speed air from jet fans installed on the ceiling of the tunnel, creating a ventilation flow in the direction of vehicle travel. The warning display board system 46 is a system that notifies tunnel users of abnormalities inside the tunnel by displaying them on an electronic display board. The radio rebroadcast system 48 is a system that allows drivers and others inside the tunnel to receive information from the road administrator. The television monitoring system 50 is a system that confirms the scale and location of a fire, activates the water spray system, and grasps the situation inside the tunnel when providing evacuation guidance. The lighting system 52 is a system that drives and controls the lighting equipment inside the tunnel.

[0072] In addition, the fire pump equipment 54 is an equipment that starts the fire pump using the disaster prevention receiving panel 10 that receives a pump start signal from the fire pump starting device 26 as described above, and supplies fire water under pressure to the water supply pipes to the fire hydrant equipment 22, etc.

[0073] In addition, the cooling pump equipment 56 is equipment that starts a cooling pump when the disaster prevention receiving panel 10 receives a temperature detection signal from a duct temperature detector installed in a duct where pipes and cables are laid inside the guard passage installed along the tunnel wall, and supplies pressurized cooling water to the water supply pipe to the inside of the duct.

[0074] [b. Disaster prevention receiving panel] (b1. Configuration of the disaster prevention receiving panel) The configuration of the disaster prevention receiving panel will be explained in more detail below. As shown in Figure 1, the disaster prevention receiving panel 10 includes a control unit 28. The control unit 28 is a function realized by, for example, executing a program, and uses, as hardware, a computer circuit or the like equipped with a CPU, memory, various input / output ports including an AD conversion port, and the like.

[0075] The control unit 28 is provided with a P-type transmission unit 30 that connects the terminal devices 18 (18-1) to 18 (18-n) and 20 (20-1) to 20 (20-n) installed in the tunnel via P-type signal lines 14, 16.

[0076] Additionally, the control unit 28 is provided with a main monitor device 32, an alarm unit 34 equipped with a speaker, buzzer, alarm indicator lights, etc., a display unit 35 equipped with various indicator lights, an operation unit 36 ​​equipped with various switches, a data transmission unit 38, and a P-type transmission unit 40. The data transmission unit 38 is connected to IG slave station equipment 42 via a data transmission line, and the P-type transmission unit 40 is connected to ventilation equipment 44, alarm display board equipment 46, radio rebroadcasting equipment 48, television monitoring equipment 50, lighting equipment 52, fire pump equipment 54, and cooling pump equipment 56 individually via P-type signal lines.

[0077] The disaster prevention receiving panel 10 is also provided with a current monitoring unit 70, a measurement line switching unit 72, a sub-monitoring device 74, and a terminal communication unit 75 for monitoring the current of the P-type signal lines 14, 16.

[0078] Here, we will explain the remote monitoring and control equipment 60 corresponding to the disaster prevention receiving panel 10. The remote monitoring and control equipment 60 is responsible for overseeing the monitoring and control of the operation of power-related equipment (power receiving and distribution equipment, private power generation equipment, ventilation equipment, lighting equipment, etc.) and tunnel emergency equipment installed in multiple tunnels. In this embodiment, for monitoring and control of the operation of the tunnel emergency equipment, the remote monitoring and control equipment 60 includes an IG slave station equipment 42 connected to the disaster prevention receiving panel 10 via a data transmission line, a dedicated external communication network 58, and a higher-level station equipment 62.

[0079] The upper station equipment 62 is equipment installed, for example, in a road management room of a road information system that operates and manages a highway network including tunnels located far from the tunnel, and is an upper station equipment in which each of the IG substation equipment 42 installed for each of the disaster prevention receiving panels 10 installed in multiple tunnels is communicatively connected in a tree-like manner.

[0080] The disaster prevention receiving panel 10 then transmits the processing results associated with the monitoring and control of fires in the tunnel from the IG substation equipment 42 via the dedicated external communication network 58 to the higher-level station equipment 62 for display, and receives the control signal transmitted from the higher-level station equipment 62 via the dedicated external communication network 58 from the IG substation equipment 42 and performs corresponding control, etc.

[0081] (b2. Monitoring and control of disaster prevention receiving panel) The monitoring control by the control unit 28 provided in the disaster prevention receiving panel 10 will be described in more detail below.

[0082] The control unit 28 performs predetermined monitoring and control based on fire-related signals from terminal devices such as the manual reporting device 24, fire pump starting device 26, fire detector, duct temperature detector, and automatic valve device, which are installed in the fire hydrant device 22 installed inside the tunnel.

[0083] As a predetermined monitoring control, for example, when the disaster prevention receiving panel 10 receives a fire notification signal by operating the manual notification device 24 provided in the fire hydrant device 22, a fire alarm is issued by sounding the main sound from the alarm unit 34, displaying a representative fire signal from the display unit 35, and displaying a fire and manual notification section from the main monitor device 32, and a response signal is sent to the fire hydrant device 22 to flash the red indicator light and turn on the response lamp.

[0084] In addition, for example, when the disaster prevention receiving panel 10 receives a pump start signal from the fire pump start device 26 by opening the fire hydrant valve opening / closing lever provided on the fire hydrant device 22, it sends a pump start signal to the fire pump equipment 54 and controls it to start up.

[0085] Furthermore, for example, if the temperature inside the duct rises and the disaster prevention receiving panel 10 receives a temperature detection signal from the duct temperature detector, it sends a pump start signal to the cooling pump equipment 56, and controls the cooling of the duct by spraying water from a water spray head installed inside the duct.

[0086] Furthermore, the control unit 28 controls other equipment, such as sending a fire notification signal to a higher-level station equipment 62 of the remote monitoring and control equipment 60 via the IG substation equipment 42 to issue an alarm at the higher-level station equipment 62, displaying a manual notification area using the television monitoring equipment 50, displaying a fire notification in the manual notification area using the alarm display board equipment 46, ventilating the manual notification area using the ventilation equipment 44, and illuminating the manual notification area using the lighting equipment 52.

[0087] Furthermore, the control unit 28 monitors for disconnection faults in the signal lines 14, 16, and when it detects a disconnection fault, it controls the alarm unit 34 to sound a fault sound, the display unit 35 to display a fault representative display, and the main monitor device 32 to display the occurrence of the fault and the faulty section on its screen. The control unit 28 monitors for disconnection faults in the signal lines 14, 16 by connecting termination resistors to the ends of the signal lines 14, 16 to pass a disconnection monitoring current, and detecting a disconnection fault when the disconnection monitoring current is cut off.

[0088] [c. Current monitoring of disaster prevention receiving panel] The current monitoring of the disaster prevention receiving panel will now be explained in more detail.

[0089] (c1. Overview of signal line current monitoring) First, an overview of current monitoring of signal lines will be explained. As shown in Figure 1, the disaster prevention receiving panel 10 is provided with a current monitoring unit 70, a measurement line switching unit 72, a sub-monitoring device 74, and a terminal communication unit 75 to monitor the current flowing through the signal lines 14 and 16. The terminal communication unit 75 is connected to a current monitoring upper station equipment 78 installed on the upper station equipment 62 side of the remote monitoring and control equipment 60 via a general-purpose external communication network 76.

[0090] The current monitoring unit 70 measures the current values ​​flowing through the signal line 14 to which the manual reporting device 24 is connected and the signal line 16 to which the fire pump device 26 is connected, stores the measurement results of the current values ​​as history data, and also determines whether the current value is abnormal based on the measurement results of the current value and stores the determination result as history data. When measuring the current value, the current monitoring unit 70 measures the current value by switching the signal lines 14, 16 on a line-by-line basis under the switching control of the measurement line switching unit 72 so that the current value of each signal line 14, 16 can be measured.

[0091] In addition, when the current monitoring unit 70 receives a transmission request from a current monitoring upper station equipment 78, which functions as an upper station equipment in current monitoring, via a general-purpose external communication network 76, it extracts the measurement results of the current values ​​of the signal lines 14, 16 and / or the judgment results of current value abnormalities from the stored history data, transmits them to the current monitoring upper station equipment 78, and displays them.

[0092] The functional configuration of the current monitoring will be described in more detail with reference to Fig. 2, which shows an embodiment of the current monitoring function of the disaster prevention receiving panel.

[0093] (c2. Signal line) First, the signal line for measuring the current value will be described in more detail. Note that Fig. 2 shows the signal line 14 connecting the manual reporting device 24 of the terminal device group 18 (18-1) in Fig. 1 as a representative example.

[0094] As shown in Figure 2, the P-type transmission unit 30 of the disaster prevention receiving panel 10 is provided with a receiving circuit 300 for each signal line. A signal line 14 (14-1) and a common line 14 (14-2) are drawn out from the receiving circuit 300 of the P-type transmission unit 30 as the signal line 14, and the no-voltage a-contact switches 240 of the manual notification devices 24 provided in the four fire hydrant devices 22 are connected in parallel between the signal line 14 (14-1) and the common line 14 (14-2), with a termination resistor 25 for line break monitoring connected to the end. The receiving circuit 300 applies a predetermined line voltage +V between the signal line 14 (14-1) and the common line 14 (14-2) by pulling up the signal line 14 (14-1) to a predetermined power supply voltage +V.

[0095] (c3.Current monitoring section) Next, a more detailed description will be given of the current monitoring unit 70. The configuration and type of the current monitoring unit 70 shown in Fig. 2 are arbitrary, but for example, a programmable logic controller (PLC) equipped with a current measurement function is used.

[0096] The current monitoring unit 70 measures the current value of the signal line by automatic measurement, all-designated measurement, selectively designated measurement, or the like, and determines whether there is an abnormality in the current value based on the measurement results of the current value.For example, at a predetermined current measurement timing, the measurement line switching unit 72 is switched and controlled by an external relay unit 88 so that the current input terminals 84, 86 of the current monitoring unit 70 are connected in a state where they are inserted into the line of the signal line 14, thereby measuring the current value flowing through the signal line 14 and determining whether there is an abnormality in the current value based on the measurement results of the current value.Note that when the control unit 28 receives a signal related to a fire from either of the signal lines 14, 16 and performs predetermined monitoring control, the current monitoring of the signal lines 14, 16 by the current monitoring unit 70 is stopped or discontinued.

[0097] Furthermore, relay unit 88 is provided with relays 90 corresponding to each of signal lines 14, 16. Current monitoring unit 70 sequentially activates relays 90 at predetermined current measurement timings, switching measurement line switching unit 72 so that current input terminals 84, 86 are connected to the signal line to be measured. For this reason, relays 90 used to switch signal lines are provided with two-circuit switching relay contacts. Furthermore, each relay 90 has one end of a coil commonly connected to a signal line that becomes the (+) side when a predetermined voltage is applied, and the other end of the coil is individually connected to a signal line that becomes the (-) side. By turning on one of the switching elements provided for each signal line that becomes the (-) side in current monitoring unit 70, current is passed through the coil of the corresponding relay 90, causing it to operate.

[0098] (c4. Measurement line switching unit) The measurement line switching unit 72 will be described in more detail. As shown in Fig. 2, a switching circuit constituting the measurement line switching unit 72 is provided on the signal line 14 (14-1) drawn from the receiving circuit 300 of the P-type transmission unit 30, and a first switching relay contact 92 and a second switching relay contact 94 of a relay 90 provided in a relay unit 88 are connected to a portion of the signal line 14 (14-1) of the signal line 14 where the signal line 14 (14-1) is cut off midway. When measuring the value of a current flowing through the signal line 14, the measurement line switching unit 72 switches between the first switching relay contact 92 and the second switching relay contact 94 of the relay 90 so that a pair of current input terminals 84, 86 of the current monitoring unit 70 are connected to the portion of the signal line 14 (14-1) of the signal line 14 where the signal line 14 (14-1) is cut off midway.

[0099] Specifically, the first switching relay contact 92 of the relay 90 has a fixed terminal a connected to the signal line 14 (14-1) on the receiving circuit 300 side (upstream side) of the P-type transmission unit 30 of the disconnected part of the signal line 14 (14-1), a fixed terminal b connected to the signal line from the current input terminal 84, and a switching terminal (common terminal) c connected to the signal line 14 (14-1) on the manual notification device 24 side (downstream side) of the terminal equipment group 18 (18-1) of the disconnected part of the signal line 14 (14-1).

[0100] Also, the second changeover relay contact 9 of the relay 904 The fixed terminal a is unconnected and separated from the disconnected portion of the signal line 14 (14-1), the fixed terminal b is connected to the upstream side of the disconnected portion of the signal line 14 (14-1), and the switching terminal (common terminal) c is connected to the signal line from the current input terminal 86.

[0101] Therefore, when the relay 90 is in an inactive state and not measuring, as shown in the figure, the first changeover relay contact 92 switches so that the changeover terminal c connects with the fixed terminal a, connecting the upstream and downstream sides of the disconnected portion of the signal line 14 (14-1), and the second changeover relay contact 94 switches so that the changeover terminal c connects with the fixed terminal a, disconnecting the upstream side of the disconnected portion of the signal line 14 (14-1) from the current input terminal 86. Therefore, a line current i, which is determined by the line voltage +V, the termination resistor 25, and the insulation resistance of the wiring cable that makes up the signal line 14, flows from the signal line 14 (14-1) to the common line 14 (14-2) without passing through the current input terminals 84, 86 of the current monitoring unit 70.

[0102] When the relay 90 is activated to measure the line current i, the switching terminal c of the first switching relay contact 92 switches from connection with the fixed terminal a to connection with the fixed terminal b, connecting the downstream side of the disconnected portion of the signal line 14 (14-1) to the current input terminal 84, and the switching terminal c of the second switching relay contact 94 switches from connection with the fixed terminal a to connection with the fixed terminal b, connecting the upstream side of the disconnected portion of the signal line 14 (14-1) to the current input terminal 86. As a result, the current input terminals 84, 86 of the current monitoring unit 70 are connected to the disconnected portion of the signal line 14 (14-1), and the voltage value generated by the current detection resistor in the current monitoring unit 70 is read as digital data by the AD conversion port to measure the current value.

[0103] (c5. Automatic measurement of current value) The automatic measurement of current values ​​by the current monitoring unit 70 will be described in more detail below with reference to Fig. 3, which shows the all-designated measurement screen of the sub-monitoring device used for all-designated measurements.

[0104] The monitor screen 120 shown in Figure 3 has an all-designated measurement button 122, a selectively designated measurement button 124, a measurement record button 126, an abnormality history button 128, and a buzzer stop button 130 located at the bottom of the screen, and when the all-designated measurement button 122 is operated, as shown by the hatching, the screen switches to an all-designated measurement screen 132.

[0105] An ON button 134 and an OFF button 136 for setting up automatic measurement are located at the top right of the monitor screen 120. The ON button 134 is initially set to the ON state, which causes the current monitoring unit 70 to perform automatic measurement by sequentially measuring the current values ​​of all signal lines at a predetermined cycle, such as once a day, and determining that the current value is abnormal if the measured current value falls outside a predetermined threshold range, for example, and storing the current value measurement results and the current value abnormality determination results as history data in the memory card 100 provided in the terminal communication unit 75.

[0106] Here, the threshold value for determining whether a current value is abnormal includes, for example, an upper limit value and a lower limit value corresponding to the threshold range, and the current monitoring unit 70 determines whether the upper limit current value is abnormal when the current value is greater than or exceeds the upper threshold value, and determines whether the lower limit current value is abnormal when the current value is less than or falls below the lower threshold value.

[0107] Furthermore, the format of the history data that the current monitoring unit 70 stores in the memory card 100 is arbitrary, but for example, the history data may be generated as text-format file data containing "measurement date, line number, upper threshold value, lower threshold value, measurement value, upper limit current value abnormal flag, lower limit current value abnormal flag," and if an abnormal current value is determined, the "upper limit current value abnormal flag" or the "lower limit current value abnormal flag" is set to "1" and stored in the memory card 100.

[0108] (c6. All specified measurements of current values) The all-specified measurement of current values ​​by the current monitoring unit 70 will be described in more detail below. When performing all-specified measurement of current values ​​using the monitor screen 120 switched to the all-specified measurement screen 132 in Figure 3, first operate the off button 136 located in the automatic measurement column at the top right to cancel automatic measurement. Next, select "up line manual notification" in the type selection unit 140 as the test target, which indicates the signal line 14 connected to the manual notification device 24 installed in the up line tunnel 12 (12-1), for example, and operate the start button 142 located in the all-specified measurement column.

[0109] This all-designated measurement operation of current values ​​using the monitor screen 120 is detected by the current monitoring unit 70, and the current values ​​of all signal lines 14 for the manual reporting device 24 installed in the selected up-track tunnel 12 (12-1) are measured in sequence, and the measurement results, including the measured current values, are displayed in measurement detail information 146. Furthermore, for each measured signal line, the measured current value is displayed in measurement value box 148 at the bottom right, and the measurement time is displayed in measurement time box 150. Furthermore, during all-designated measurement, measurement in progress indicator 152 at the top right of the screen changes to "measuring," indicating that all-designated measurement is being performed.

[0110] In the center of the all-specified measurement screen 132, measurement results are listed for each signal line as measurement details 146, broken down into the following categories: line number (No.), lower threshold value, upper threshold value, and measurement value. For example, for line number 002, the measured value is 1.85 mA, which exceeds the upper threshold value of 1.00 mA, and is therefore determined to be an upper limit current value abnormality. The display for line number 002 changes to indicate the current value abnormality, as indicated by the hatching. For line number 027, the measured value is 0.00 mA, which is below the lower threshold value of 0.01 mA, and is therefore determined to be a lower limit current value abnormality. The display for line number 027 changes to indicate the current value abnormality, as indicated by the hatching. If a current value abnormality is detected for any signal line, the current abnormality occurrence indicator 154 changes to indicate that a current value abnormality has been detected.

[0111] When all the designated measurements are completed, the current monitoring unit 70 stores the current value measurement results and the current value abnormality determination results as history data in the memory card 100 provided in the terminal communication unit 75. Furthermore, when all the designated current value measurements are completed, the automatic measurement of current values ​​can be restored by operating the automatic measurement ON button 134, and if it is desired to stop all the designated current measurements before they are completed, the stop button 144 located in the all designated measurement column can be operated to interrupt all the designated measurements.

[0112] (c7. Selective measurement of current value) The selectively designated measurement of the current value by the current monitoring unit 70 will be described in more detail below with reference to Fig. 4, which shows the selectively designated measurement screen of the sub-monitoring device used for the selectively designated measurement.

[0113] 4, operating the select / specify measurement button 124 located at the bottom of the monitor screen 120 switches to the select / specify measurement screen 160 shown in the figure. When using the monitor screen 120 that has switched to the select / specify measurement screen 160 to perform a select / specify measurement of a current value, first operate the off button 136 located in the automatic measurement column at the top right to cancel automatic measurement. Next, select, for example, "up line manual notification" as the test target in the type selection section 140, and then operate the selection buttons 162 and 164 located in the select / specify measurement column to select the signal line to be measured.

[0114] Here, the currently selected signal line is indicated by a change in the display, such as the line number 004 shown hatched in the measurement detail information 146, and by operating the selection buttons 162 and 164, the changed display moves up or down, allowing any line number to be selected. Once the line number for the selective measurement has been selected, the start button 166 located in the selective measurement column is operated. In Figure 4, line number 004 is selected.

[0115] This operation to select and specify a measurement of a current value using the monitor screen 120 is detected by the current monitoring unit 70, which measures the current value of the signal line 14 with line number 004 for the manual reporting device 24 installed in the up-track tunnel 12 (12-1), and displays the measurement results including the measured current value in the measurement details information 146. Also, when the selection and specification measurement is started, the measurement in progress display 152 changes to "measuring" to indicate that the selection and specification measurement is being performed.

[0116] Here, the measurement value of line number 004 where the selected measurement was performed is 1.25 mA, which exceeds the upper threshold value of 1.00 mA, so it is determined that the upper limit current value is abnormal.The display of line number 004 changes as shown by hatching, and the current value abnormality occurrence display 154 changes to indicate that the current value has been determined to be abnormal.

[0117] When it is desired to end the selectively specified measurement of the current value, the stop button 168 in the selectively specified measurement column can be operated, followed by operating the enter button 134 in the automatic measurement column, thereby returning to automatic measurement of the current value. Note that, upon completion of the selectively specified measurement, the current monitoring unit 70 may store the measurement results of the current value obtained by the selectively specified measurement and the determination results of the current value abnormality as history data in the memory card 100 provided in the terminal communication unit 75.

[0118] (c8. Memory card with communication function) The memory card with communication function will be described in more detail below. Memory card 100 provided in terminal communication unit 75 shown in Figure 2 is, for example, an electronic storage medium that can be attached to or detached from a device or apparatus, and is equipped with a flash memory that can read and write data and an input / output interface for the same, and the stored data remains even when the power to the device or apparatus is turned off, and includes SD memory cards and the like.

[0119] The memory card 100 of the terminal communication unit 75 used in this embodiment also includes a communication unit. The function and configuration of the communication unit are arbitrary, but in this embodiment, for example, a wireless LAN client 102 is provided as shown in Fig. 2, and the wireless LAN client 102 is, for example, a Wi-Fi (registered trademark) client. The wireless LAN client 102 is capable of transmitting the current monitoring history data stored in the memory card 100 to external devices and equipment via a communication network including an external wireless LAN access point.

[0120] [d. General-purpose external communication network] The general-purpose external communication network will be described in more detail below. As shown in Fig. 2, the general-purpose external communication network 76 connects the current monitoring unit 70 provided in the disaster prevention receiving panel 10 with a current monitoring upper station facility 78 provided as a higher-level facility, and utilizes a general-purpose communication network that is open to the public and available for use by general users, including business entities that operate and manage the disaster prevention receiving panel 10 and the current monitoring upper station facility 78.

[0121] The general-purpose external communication network 76 may have any function or configuration, but may be configured, for example, to connect the terminal communication equipment 104 installed on the tunnel side where the disaster prevention receiving panel 10 is installed with the current monitoring higher-level station equipment 78 via a mobile phone network 112. Note that the mobile phone network 112 may be replaced by an internet line, or a communication network may be a combination of the mobile phone network 112 and the internet line.

[0122] Furthermore, the configurations and functions of the terminal communication equipment 104 and the current monitoring upper station equipment 78 are arbitrary, but for example, the terminal communication equipment 104 includes a wireless LAN access point 106, a router 108, and a mail processing unit 110, and the current monitoring upper station equipment 78 includes a router 114, a mail processing unit 116, and a monitor device 118.

[0123] The wireless LAN access point 106 is communicatively connected to the terminal communication equipment 104 and the terminal communication unit 75 of the disaster prevention receiving panel 10, and is communicatively connected in accordance with a predetermined wireless LAN communication protocol between the wireless LAN access point 106 and the wireless LAN client 102 integrated into the memory card 100 of the terminal communication unit 75. More specifically, the wireless LAN access point 106 and the wireless LAN client 102 are a Wi-Fi (registered trademark) access point and a Wi-Fi (registered trademark) client, and are communicatively connected in accordance with the Wi-Fi (registered trademark) communication protocol.

[0124] The routers 108 and 114 communicate by email between the email processors 110 and 116 via the mobile phone network 112. The configuration and functions of the routers 108 and 114 are arbitrary, but for example, a router equipped with an LTE-SIM card is used. A SIM card (Subscriber Identity Module Card) is an IC card required for communication via the mobile phone network 112 and records a unique identification number (ID) for specifying a telephone number.

[0125] LTE (Long Term Evolution) is a mobile phone communication standard that is positioned between third-generation mobile phones (3G) and fourth-generation mobile phones (4G), and enables high-speed data communication with a maximum download speed of 100 Mbps or more and an upload speed of 50 Mbps or more. Note that the communication standard using the mobile phone network 112 is not limited to LTE, and any appropriate communication standard such as 4G or 5G may be selected.

[0126] In this embodiment, when a request for transmission of current monitoring history data is made to the disaster prevention receiving panel 10 based on the operation of an attendant at the current monitoring higher-level equipment 78, the requested current monitoring history data stored in the memory card 100 is read out, transmitted to the current monitoring higher-level equipment 78, and displayed on the monitor device 118.

[0127] For this reason, the memory card 100 of the disaster prevention receiving panel 10 reads out the history data stored, for example, as text-format file data, in response to a transmission request from a higher-level facility received by the wireless LAN client 102, and transmits the read history data from the wireless LAN client 102 to the wireless LAN access point 106 of the terminal communication facility 104.

[0128] The mail processing unit 110 of the terminal communication equipment 104 creates an e-mail addressed to the mail processing unit 116 of the current monitoring host station equipment 78, attaches the history data received by the wireless LAN access point 106 as a file, and sends the e-mail with the history data file attached via the router 108.

[0129] An e-mail sent from the terminal communication equipment 104 is received by the e-mail processing unit 116 via the mobile phone network 112, via the router 114 of the current monitoring host station equipment 78. The e-mail processing unit 116 opens the file attached to the received e-mail, stores the current monitoring history data in memory, and displays it on the monitor device 118 in the same manner as the display of the sub-monitor device 74 shown in Figures 3 and 4, for example, so that it can be confirmed by a staff member of the current monitoring host station equipment 78.

[0130] Here, a request by an attendant at the current monitoring higher-level station equipment 78 to transmit current monitoring history data to the disaster prevention receiving panel 10 can specify predetermined narrowing conditions. While any narrowing conditions can be specified, for example, the systems corresponding to the up-line tunnel and the down-line tunnel, terminal devices such as manual reporting devices, fire hydrant activation devices, and duct temperature detectors, as well as section numbers, can be specified as narrowing conditions. Furthermore, a transmission request can be made to extract and transmit any history data, such as the results of determining whether a signal line has an abnormal current value, or the results of current measurement.

[0131] Therefore, staff at the current monitoring upper station equipment 78 can extract and display the specific historical data they need from the vast amount of historical data stored in the memory card 100 of the disaster prevention receiving panel 10, enabling them to efficiently make judgments about specific line degradation conditions, etc. based on the historical data.

[0132] [e. Control operation of current monitoring unit] The control operation of the current monitoring unit will be described in more detail below with reference to the flowchart of Fig. 5, which shows an example of current monitoring control by the current monitoring unit of the disaster prevention receiving panel.

[0133] As shown in FIG. 5, the current monitoring unit 70 is initially set to automatically measure the current value, and when it determines that a predetermined measurement timing, for example, once a day, has arrived (step S1), it performs a current value measurement process to measure the current values ​​of all signal lines 14, 16 sequentially (step S2). Next, it performs a current value abnormality determination process to determine that the current value is abnormal if the measured current value is, for example, outside a predetermined threshold range (step S3), and then performs a history data storage process to generate history data including the current value measurement results and the current value abnormality determination results and store the data in the memory card 100 (step S4).

[0134] Furthermore, if a request for transmission of historical data is received from the current monitoring upper station equipment 78, which is the upper equipment (step S5), the requested historical data is read from the memory card 100 and transmitted to the current monitoring upper station equipment 78 (step S6).

[0135] Furthermore, even when all designated measurements or selective designated measurements are set, the current monitoring unit 70 determines the measurement timing corresponding to each measurement start operation and performs current value measurement processing, current value abnormality determination processing, and history data storage processing (steps S1 to S4). Furthermore, when a request for history data transmission is received from the current monitoring higher-level station equipment 78, history data of automatic measurements and manual measurements may also be transmitted.

[0136] [f. Tunnel disaster prevention system using a dedicated external communication network] The tunnel disaster prevention system using a dedicated external communication network will be explained in more detail below. In this explanation, reference will be made to Figure 6, which shows the current monitoring function of the disaster prevention receiving panel using a dedicated external communication network.

[0137] As shown in Figure 6, the P-type transmission unit 30, current monitoring unit 70, measurement line switching unit 72 and relay unit 88 provided in the disaster prevention receiving panel 10 are the same as those in the embodiment of Figure 2, and measure the current values ​​flowing through the signal lines 14 and 16 and determine whether the current values ​​are abnormal.The current value measurement results and the current value abnormality determination results are stored in the memory card 200 as history data.

[0138] The history data stored in the memory card 200 is displayed on the sub-monitor device 74 by a display control unit 202. Furthermore, when a request for transmission of the history data is received from the current monitoring upper station equipment 78, which is the upper equipment in current monitoring, the history data stored in the memory card 200 is read from the memory card 200 and transmitted to the current monitoring upper station equipment 78.

[0139] The disaster prevention receiving panel 10 and the current monitoring upper station equipment 78 are connected for communication via a dedicated external communication network 58. The dedicated external communication network 58 is an external communication network used between the upper station equipment 62 of the remote monitoring and control equipment 60 shown in FIG. 1 and the IG slave station equipment 42. The type and configuration of the dedicated external communication network 58 are arbitrary, but for example, a LAN communication unit 206 and a router 208 are provided on the tunnel side where the disaster prevention receiving panel 10 is installed, and a LAN communication unit 214 and a router 212 are provided on the current monitoring upper station equipment 78 side, with the router 208 and the router 212 connected for communication via a predetermined intranetwork 210. The configuration and function of the LAN communication units 206 and 214 are arbitrary, but for example, an Ethernet unit is used, and a communication connection is made in accordance with an Ethernet communication protocol.

[0140] The dedicated external communication network 58 configured in this manner uses a non-public ID and password, and enables communication connections only between devices and equipment belonging to the business entity that owns, operates, and manages the tunnel disaster prevention system, and utilizes a dedicated communication network that is not available to the general public.

[0141] The disaster prevention receiving panel 10 is also provided with a file transfer communication unit 204, which is communicatively connected to a LAN communication unit 206 of the dedicated external communication network 58. The communication connection between the file transfer communication unit 204 and the LAN communication unit 206 is arbitrary, but a known field network or PLC link corresponding to the communication connection of the programmable logic controller (PLC) constituting the current monitoring unit 70 is used. The current monitoring upper station equipment 78 is also provided with a processing device 216 and a monitor device 218. The processing device 216 may be replaced with a server.

[0142] When the file transfer communication unit 204 of the disaster prevention receiving panel 10 receives a request to send current monitoring history data from the processing device 216 of the current monitoring upper station equipment 78 via the dedicated external communication network 58, it reads out the requested history data stored in the memory card 200 and transmits it to the current monitoring upper station equipment 78 via the dedicated external communication network 58, and the processing device 216 of the current monitoring upper station equipment 78 displays the received history data on the monitor device 218.

[0143] Even in a tunnel disaster prevention system using such a dedicated external communication network 58, when a request for transmission of historical data is made from the current monitoring upper station equipment 78 in situations where it is difficult to rotate or make regular patrols because staff are always present on the tunnel side, the historical data of the current value measurement results and current value abnormality judgment results stored in the memory card 200 of the disaster prevention receiving panel 10 is acquired and displayed, for example, on the screen of the monitor device 218, so that the current monitoring upper station equipment 78, which is the upper equipment, can check for signal lines that have deteriorated over time and take appropriate action.

[0144] [g. Modifications of the present invention] Modifications of the disaster prevention system according to the present invention will now be described. In addition to the above-described embodiment, the communication system of the present invention includes the following modifications.

[0145] (Memory card) In the above embodiment, the history data of current monitoring is stored using a memory card, but this is not limiting and any electronic recording medium capable of storing history data may be used.

[0146] (Housing structure) In the above embodiment, the current monitoring unit is provided in the same housing as the disaster prevention receiving panel, but the current monitoring unit may be provided in a separate housing.

[0147] (Disaster prevention receiving panel monitor device) In the above embodiment, a main monitor device is provided for monitoring and control of emergency equipment using a disaster prevention receiving panel, and a sub-monitor device is provided for current monitoring and control by the current monitoring unit, but a single monitor device may also be provided for monitoring and control of emergency equipment and current monitoring and control by the current monitoring unit.

[0148] (Current measurement control by host equipment) In the above embodiment, automatic measurement, all designated measurement or selective designated measurement is switched by operating the current monitoring unit installed in the disaster prevention receiving panel, but automatic measurement, all designated measurement or selective designated measurement by the current monitoring unit of the disaster prevention receiving panel can also be switched by remote operation from a current monitoring upper station equipment installed as a higher-level equipment.

[0149] (others) Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited to the numerical values ​​shown in the above embodiments. [Explanation of symbols]

[0150] 10: Disaster prevention receiving panel 12(12-1): Up line tunnel 12(12-2): Down line tunnel 14,16: Signal line 18(18-1)-18(18-n), 20(20-1)-20(20-n): Terminal equipment group 22: Fire hydrant equipment 24:Manual notification device 25: Termination resistor 26: Fire pump starting device 28: Control unit 30, 40: P-type transmission section 32: Main monitor device 34:Alarm section 35: Display section 36:Operation unit 38: Data transmission unit 42:IG slave station equipment 44: Ventilation equipment 46: Alarm display board equipment 48: Radio rebroadcasting equipment 50: TV monitoring equipment 52: Lighting equipment 54: Fire pump equipment 56: Cooling pump equipment 58: Dedicated external communication network 60: Remote monitoring and control equipment 62: Upper station equipment 70: Current monitoring section 72: Measurement line switching unit 74: Sub-monitor device 75: Terminal Communications Department 76: General purpose external communication network 78: Current monitoring upper station equipment 84, 86: Current input terminals 88: Relay unit 90: Relay 92: First changeover relay contact 94: Second changeover relay contact 100,200:Memory card 102: Wireless LAN client 104: Terminal communication equipment 106: Wireless LAN access point 108, 114, 208, 212: Router 110, 116: Mail processing section 112: Mobile phone network 118,218:Monitoring device 202: Display control unit 204: File transfer communication unit 206, 214: LAN communication section 210: Intranet 216: Processing device 300: Receiving circuit

Claims

1. Disaster prevention receiving panel, a terminal device that outputs a predetermined signal related to the abnormality to the disaster prevention receiving panel via a signal line when an abnormality occurs; a current monitoring unit that measures a current value flowing through the signal line and stores history data of the measurement results, and determines whether a current value is abnormal based on the measurement results of the current value and stores history data of the determination results; A disaster prevention system comprising: The current monitoring unit When a transmission request is received from a higher-level facility connected via a predetermined communication network, extracting at least a determination result of the current value abnormality of the signal line from the stored history data and transmitting the result to the higher-level facility; A disaster prevention system characterized by extracting the judgment results of the current value abnormality of the signal line and / or the measurement results of the current value in accordance with specified narrowing conditions included in the transmission request from the higher-level equipment from the stored history data and transmitting them to the higher-level equipment.

2. A disaster prevention receiving panel; a terminal device that outputs a predetermined signal related to the abnormality to the disaster prevention receiving panel via a signal line when an abnormality occurs; a current monitoring unit that measures a current value flowing through the signal line and stores history data of the measurement results, and determines whether a current value is abnormal based on the measurement results of the current value and stores history data of the determination results; A disaster prevention system comprising: The current monitoring unit When a transmission request is received from a higher-level facility connected via a predetermined communication network, the measurement result of the current value of the signal line is extracted from the stored history data and transmitted to the higher-level facility; A disaster prevention system characterized by extracting the judgment results of the current value abnormality of the signal line and / or the measurement results of the current value in accordance with specified narrowing conditions included in the transmission request from the higher-level equipment from the stored history data and transmitting them to the higher-level equipment.

3. 3. The disaster prevention system according to claim 1 or 2, A disaster prevention system characterized in that the current monitoring unit is remotely controlled from the host equipment.

4. The disaster prevention system according to any one of claims 1 to 3, The current monitoring unit At a predetermined timing, the current values ​​flowing through all the signal lines are measured to determine whether each current value is abnormal, and history data of the measurement results of the current values ​​and the determination results of the current value abnormality for each of the signal lines is stored; or When a predetermined all-designated measurement operation that designates all of the signal lines is detected at any timing, the current values ​​flowing through all of the signal lines are measured to determine whether each current value is abnormal, and history data of the measurement results of the current values ​​for all of the signal lines and the determination results of the current value abnormality are stored; or A disaster prevention system characterized in that, when a predetermined selection and designation measurement operation is detected in which one or more of the signal lines are selected and designated at an arbitrary timing, the system measures the current value flowing through each of the selected and designated signal lines, determines whether each current value is abnormal, and stores historical data of the measurement results of the current value of each of the selected and designated signal lines and the determination results of the current value abnormality.

5. The disaster prevention system according to any one of claims 1 to 3, the current monitoring unit stores the history data in an electronic recording medium having a communication function; A disaster prevention system characterized in that, when a transmission request is received from the host equipment that is connected to the communication network, the historical data stored in the electronic recording medium is read and transmitted to the host equipment.

6. The disaster prevention system according to any one of claims 1 to 3, the current monitoring unit includes a pair of current input terminals for inputting a current flowing through the signal line; A disaster prevention system characterized in that a measurement line switching unit is provided which switches the connection of the pair of current input terminals from a state where they are not inserted in the line of the signal line to a state where they are inserted when measuring the current value.

7. The disaster prevention system according to claim 6, the measurement line switching unit is provided for each signal line, When measuring the current value, a measurement line switching unit provided on the signal line for measuring the current value switches the connection so that the pair of current input terminals are inserted into the line of the signal line for measuring the current value, and the current monitoring unit measures the current value flowing in each of the signal lines to be measured.

8. The disaster prevention system according to claim 6 or 7, The measurement line switching unit a relay having a first changeover relay contact and a second changeover relay contact that are activated when energized is provided for each of the signal lines; When the relay is not activated, the first changeover relay contact connects the upstream side and downstream side of the line of the signal line at the interposition portion of the pair of current input terminals, and the second changeover relay contact cuts off the connection between the upstream side of the line of the signal line and one of the pair of current input terminals of the current monitoring unit, thereby not inserting the current monitoring unit into the line of the signal line, When the relay is activated, the first switching relay contact at the insertion portion of the pair of current input terminals connects the downstream side of the line of the signal line to the other of the pair of current input terminals of the current monitoring unit, and the second switching relay contact connects the upstream side of the line of the signal line to one of the pair of current input terminals of the current monitoring unit, thereby inserting the current monitoring unit into the line of the signal line.

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