Disaster prevention system

Abstract

To provide a disaster prevention system capable of giving an alarm by capturing a sign state before a current value abnormal state of a signal line is detected, and grasping detailed change in a current value after the sign state is detected.SOLUTION: In a tunnel disaster prevention system, a monitoring control unit 56 of a disaster prevention receiving panel 10 receives a predetermined signal transmitted from terminal apparatuses such as an in-duct temperature detector, a hydrant valve opening / closing detection switch 14, a manual notification device 16, and a hydrant device 18, which are installed in a tunnel as a disaster prevention monitoring area and transmit a signal through operation of a non-voltage a-contact switch, through a signal line 12 to perform predetermined monitoring control; and a current monitoring unit 58 monitors current of a signal line to which the terminal apparatuses are connected for transmitting a signal through operation of the non-voltage a-contact switch.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] 2. Description of the Related Art Conventionally, emergency facilities are installed in tunnels for expressways and the like to protect people and vehicles from fire accidents that occur within the tunnel.

[0003] These emergency facilities are equipped with fire detectors, manual reporting devices, and emergency telephones for fire monitoring and reporting, as well as fire hydrants for extinguishing fires and preventing the spread of fires, and water sprayers that spray fire-fighting water from water spray heads to protect the tunnel body and ducts from fires.A tunnel disaster prevention system is constructed by installing a disaster prevention receiving panel that monitors and controls the terminal equipment of these emergency facilities.

[0004] Tunnel disaster prevention systems, which consist of disaster prevention receiving panels and terminal devices, are broadly divided into R-type transmission methods and P-type direct transmission methods. The R-type transmission method connects terminal devices such as fire detectors with addresses set to the transmission line, and enables individual management by detecting and controlling each terminal device through transmission control. The P-type direct transmission method divides the terminal devices into predetermined section units according to their type, connects multiple terminal devices belonging to the same section to the signal lines drawn out for each section, and performs detection and control for each signal line.

[0005] In a P-type direct transmission tunnel disaster prevention system, the terminal devices such as the manual reporting device, fire hydrant activation device, and duct temperature detector are configured with a no-voltage a-contact switch as the signal output section when operated or detected, and the no-voltage a-contact switch is connected to the signal line drawn from the disaster prevention receiving panel. The no-voltage a-contact switch is normally off in the monitoring state, and is turned on by operation or detection to output a no-voltage contact signal.

[0006] Specifically, a power supply voltage is applied from the disaster prevention receiving panel to one of the signal lines via a pull-up resistor, and in the steady monitoring state with the no-voltage a-contact switch off, almost no current consumption flows in the signal line, and the power supply voltage between the signal lines as seen from the disaster prevention receiving panel is maintained at approximately the power supply voltage.When the no-voltage a-contact switch is on, current flows in the signal line, and the voltage between the signal lines as seen from the disaster prevention receiving panel drops to approximately zero volts.The disaster prevention receiving panel detects an increase in current consumption in the signal line or a drop in voltage between the signal lines and outputs a received signal to the control unit indicating operation or detection of the terminal device.

[0007] For example, if a fire report signal is received from a manual reporting device, the disaster prevention receiving panel will perform control operations such as displaying a fire, controlling the lighting of the response lamp on the terminal, displaying the manual reporting section, and outputting a fire pump activation signal, and will also transmit the fire report signal to external equipment such as remote monitoring and control equipment, television monitoring equipment, variable road information board equipment, tunnel ventilation equipment, and lighting equipment, allowing the appropriate response control to be carried out. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-246962 [Patent Document 2] Japanese Patent Application Publication No. 11-128381 [Patent Document 3] Japanese Patent Application Laid-Open No. 2014-157435 [Patent Document 4] Japanese Patent Application Publication No. 2-234298 Summary of the Invention [Problem to be solved by the invention]

[0009] In such conventional P-type direct connection tunnel disaster prevention systems, deterioration over time of the signal lines (external cables) connecting the terminal equipment leads to a deterioration in insulation, causing a current greater than that expected in normal monitoring conditions to flow through the signal lines connecting the terminal equipment. This causes the disaster prevention receiving panel to interpret this as a signal being received due to the operation or detection activity of the terminal equipment, and issues an alarm. This also frequently results in the tunnel being closed to traffic by linking other equipment such as remote monitoring and control equipment, television monitoring equipment, variable road information board equipment, tunnel ventilation equipment, and lighting equipment.

[0010] In conventional current monitoring devices, if the current value for each signal line obtained by periodic measurement falls outside a threshold range determined by specified upper and lower limits, the device determines that the current value is abnormal and issues an alarm.However, it is assumed that fluctuations in the current value due to insulation deterioration of the signal line, etc., will occur before the current value is determined to be abnormal.If such signs of current value abnormality can be detected at an early stage, it will be possible to predict that the current value will become abnormal in the near future, and appropriate measures will be prepared at an early stage.

[0011] The present invention aims to provide a disaster prevention system that can detect and issue an alarm about an abnormal current value in a signal line before the abnormal current value is detected, and that can grasp detailed changes in the current value after the abnormal current value is detected. [Means for solving the problem]

[0012] (Disaster Prevention System 1) The present invention is a disaster prevention system in which a monitoring control unit receives a predetermined signal transmitted via a signal line from a terminal device arranged corresponding to a disaster prevention monitoring area and performs predetermined monitoring control, It is characterized by having a current monitoring unit that monitors the current in the signal line to which the terminal device that transmits a signal by operating the no-voltage a-contact switch is connected.

[0013] (Disaster Prevention System 2) The present invention is a disaster prevention system in which a monitoring control unit receives a predetermined signal transmitted via a signal line from a terminal device arranged corresponding to a disaster prevention monitoring area and performs predetermined monitoring control, The terminal device is characterized by being provided with a current monitoring unit that monitors the current in the signal line to which the duct temperature detector is connected.

[0014] (Disaster Prevention System 3) The present invention is a disaster prevention system in which a monitoring control unit receives a predetermined signal transmitted via a signal line from a terminal device arranged corresponding to a disaster prevention monitoring area and performs predetermined monitoring control, The fire hydrant valve open / close detection switch is a terminal device that is characterized by having a current monitoring unit that monitors the current in the signal line to which it is connected.

[0015] (Determining the deterioration status of signal lines) The current monitoring unit determines the degradation state of the signal line based on the current measurement results obtained by monitoring the current of the signal line.

[0016] (Predictive alarm for abnormal current value) If the current monitoring unit determines that the deterioration of the signal line is a sign of a current value abnormality, which predicts that the current value flowing through the signal line will reach an abnormal state, an alarm for a current value abnormality is output.

[0017] (Change measurement conditions based on signs of current abnormality) The current monitoring unit The current value flowing through the signal line is measured at a predetermined interval. When it is determined that there is a sign of a current value abnormality, the predetermined period is changed to a period shorter than the currently set period, and the current value flowing through the signal line that is determined to be a sign of a current value abnormality is measured; A second display unit, which is different from the first display unit on which predetermined information regarding disaster prevention monitoring is displayed, The current measurement result acquired at a cycle shorter than the predetermined cycle changed in accordance with the judgment of the sign of the current value abnormality is displayed together with information about the changed cycle. 、 A first display unit and a second display unit are provided in a housing of a disaster prevention receiving panel having a door that can be opened and closed by rotating around the front, the first display unit being arranged on the surface of the door that can be seen from the front of the housing when the door is closed, and the second display unit being arranged inside the housing where there is a case where the first display unit can be seen from a position where it cannot be seen when the door is open. do. [Effects of the Invention]

[0018] (Effectiveness of disaster prevention systems) The present invention is a disaster prevention system in which a monitoring control unit receives predetermined signals transmitted via signal lines from terminal devices placed corresponding to disaster prevention monitoring areas and performs predetermined monitoring control, and is equipped with a current monitoring unit that monitors the current of a signal line to which a terminal device that transmits a signal by operating a no-voltage a-contact switch is connected, a current monitoring unit that monitors the current of a signal line to which a duct temperature detector is connected as a terminal device, or a current monitoring unit that monitors the current of a signal line to which a fire hydrant valve opening / closing detection switch is connected as a terminal device, thereby making it possible to identify the terminal device and then monitor the current of the signal line to which that terminal device is connected.

[0019] (Effect of determining the deterioration status of signal lines) The current monitoring unit determines the deterioration status of the signal line based on the current measurement results obtained by monitoring the current of the signal line, and if the current monitoring unit determines that the deterioration status of the signal line is a sign of an abnormal current value, which is predicted to lead to a state where the current value flowing through the signal line becomes abnormal, it outputs a warning of an abnormal current value.This makes it possible to know the signs of an abnormal current value, which is a stage before the signal line becomes abnormal, and to identify problems such as a high possibility of the signal line becoming abnormal in the near future, and to take appropriate measures.

[0020] (Effect of changing measurement conditions based on the detection of signs of current abnormalities) The current monitoring unit measures the current value flowing through the signal line at a predetermined period, and if it determines that there is a sign of an abnormal current value, it changes the predetermined period to a period shorter than the currently set period and measures the current value flowing through the signal line that has been determined to be a sign of an abnormal current value.This makes it possible to collect more information about the current value in a short period of time for a signal line that has been determined to be a sign of an abnormal current value, and also makes it possible to determine the current value abnormality early even if the current value actually becomes abnormal after being determined to be a sign of an abnormal current value. [Brief explanation of the drawings]

[0021] [Figure 1] An explanatory diagram showing the overview of the tunnel disaster prevention system [Figure 2] An explanatory diagram showing the appearance of the disaster prevention receiving panel [Figure 3] An explanatory diagram showing the monitor device when the panel door of the disaster prevention receiving panel is opened [Figure 4] Block diagram showing the functional configuration of the tunnel disaster prevention system [Figure 5] Graph showing the prediction of abnormal current values ​​based on the setting of the prediction threshold range [Figure 6] Graph showing the prediction of abnormal current values ​​based on the difference from the average current [Figure 7] A graph showing the current value difference from the previous measurement to predict abnormal current values [Figure 8] FIG. 10 is an explanatory diagram showing the measurement record screen of the monitor device displaying the measurement history obtained by periodic measurement. [Figure 9] FIG. 10 is an explanatory diagram showing a measurement record filtering screen of a monitor device that displays measurement histories extracted by setting filtering conditions. [Figure 10] FIG. 10 is a diagram showing a screen for narrowing down potential signal lines in a monitoring device, which displays a measurement history obtained by shortening the measurement interval for a signal line determined to be a potential current abnormality. [Figure 11] An explanatory diagram showing another embodiment of a disaster prevention receiving panel in which a graphic panel, a display panel, and an operation panel are provided on the front door panel. [Figure 12] FIG. 12 is an explanatory diagram showing the display panel of FIG. 11. DETAILED DESCRIPTION OF THE INVENTION

[0022] [Outline of the tunnel disaster prevention system] Figure 1 is an explanatory diagram showing an overview of the tunnel disaster prevention system. As shown in Figure 1, an inbound tunnel 1a and an outbound tunnel 1b are constructed as tunnels for an expressway, and the inbound tunnel 1a and the outbound tunnel 1b are connected by an evacuation tunnel 2.

[0023] Inside the up-track tunnel 1a and the down-track tunnel 1b, fire hydrant devices 18 are installed at intervals of, for example, 50 meters along the walls of the guard passages in the longitudinal direction of the tunnels.

[0024] The fire hydrant device 18 stores a hose with a nozzle inside the hydrant door, and in the event of a fire, the hydrant door is opened to pull out the hose with the nozzle, and when the fire hydrant valve opening / closing lever is opened, fire water is discharged, and the fire hydrant valve opening / closing detection switch 14 is turned on to start the fire pump.

[0025] In addition, the fire hydrant device 18 is provided with a reporting device door, and the reporting device door is provided with a manual reporting device (transmitter) 16. In this way, the fire hydrant device 18 is provided with the hydrant valve open / close detection switch 14 and the manual reporting device 16 as terminal devices, and when the no-voltage a-contact switches that function as contact means are turned on, a fire hydrant start signal and a fire reporting signal are output.

[0026] The fire hydrant device 18 is also provided with a pump start switch for use by the fire brigade, but since it is the same switch in terms of the system that outputs the same pump start signal as the fire hydrant valve open / close detection switch 14, it will be described below as the fire hydrant valve open / close detection switch (including the pump start switch) 14. Furthermore, manual reporting devices 16 are installed not only in the fire hydrant device 18 but also in emergency telephone booths, but in the following explanation, the manual reporting device provided in the fire hydrant device 18 will be used as a representative.

[0027] In addition to the fire hydrant device 18, other emergency tunnel equipment includes a fire detector, an automatic valve device, an in-duct temperature detector, etc., but these are not shown in the figure.

[0028] Fire detectors are installed along the longitudinal walls of the tunnel at intervals of, for example, 25 or 50 meters, with monitoring areas set up on both sides, 25 or 50 meters apart, to detect flames caused by a fire and sound a fire alarm.

[0029] The automatic valve device constitutes a water spray system, and the main valve is opened by remotely controlling the opening of the operating electric valve, and fire-fighting water is sprayed from multiple water spray heads installed longitudinally at the top of the tunnel wall to protect the tunnel body from fire.

[0030] The duct temperature detector is placed in a duct containing pipes and cables inside the guard passage along the length of the tunnel, and detects a rise in temperature inside the duct due to a cable fire, etc., and outputs a temperature detection signal by turning on a no-voltage a-contact switch that functions as a contact means.

[0031] Disaster prevention receiving panels 10 are installed in the monitoring centers of the up-line tunnel 1a and the down-line tunnel 1b. In addition to the disaster prevention monitoring function for the up-line tunnel 1a and the down-line tunnel 1b, the disaster prevention receiving panel 10 is also provided with a current monitoring function for monitoring the current of the P-type signal line to which the terminal equipment is connected.

[0032] P-type signal lines 12-1 to 12-n are drawn from the disaster prevention receiving panel 10 into the up-line tunnel 1a and the down-line tunnel 1b for each predetermined section divided along the tunnel's length, and a plurality of fire hydrant valve opening / closing detection switches 14 and manual reporting devices 16 installed in each section are connected to them.

[0033] Similarly, P-type signal lines are drawn out for each section to connect the in-duct temperature detectors installed in the ducts to the multiple in-duct temperature detectors installed in each section, but this is not shown in the figure. Furthermore, signal lines 12-1 to 12-n may be referred to as signal lines 12 when there is no need to distinguish them.

[0034] The P-type signal circuit 12 is composed of a signal line and a common line, and when the no-voltage a-contact switches provided on the hydrant valve open / close detection switch 14 of the hydrant device 18, the manual notification device 16, and the duct temperature detector are connected, the no-voltage a-contact switches are turned on by the respective operations or detection operations, causing circuit current to flow, thereby sending the hydrant activation signal, fire notification signal, and temperature detection signal to the disaster prevention receiving panel 10.

[0035] In addition to the fire hydrant equipment 18, fire detectors, and automatic valve devices, the tunnel's emergency facilities also include a fire pump system 20, duct cooling pump system 22, IG satellite station system 24, ventilation system 28, warning display board system 30, radio rebroadcast system 32, television monitoring system 34, and lighting system 36. Except for the IG satellite station system 24, 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. Here, the IG satellite station system 24 is a communication facility that connects the disaster prevention receiving panel 10 to remote monitoring and control system 26, an external higher-level facility, via a network 25.

[0036] The ventilation equipment 28 is a facility that provides energy to the air inside the tunnel by operating jet fans installed on the ceiling side of the tunnel to blow out air at high speeds, thereby creating airflow in the longitudinal direction of the tunnel.

[0037] The warning display board equipment 30 is equipment that notifies tunnel users of any abnormalities inside the tunnel by displaying them on an electronic display board. The radio rebroadcast equipment 32 is equipment that allows drivers and others inside the tunnel to receive information from the road administrator. The television monitoring equipment 34 is equipment that checks the scale and location of a fire, activates water spray equipment, and grasps the situation inside the tunnel when providing evacuation guidance. The lighting equipment 36 is equipment that drives and manages the lighting equipment inside the tunnel.

[0038] [Disaster prevention receiving panel monitor device] Figure 2 is an explanatory diagram showing the appearance of the disaster prevention receiving panel, with Figure 2(A) showing the front and Figure 2(B) showing the side. Figure 3 is an explanatory diagram showing the state when the panel door of the disaster prevention receiving panel is opened and the monitor device can be seen.

[0039] As shown in Figure 2, the disaster prevention receiving panel 10 has a box-shaped housing 60 that is open at the front and rear, and a panel door 62 that can be opened and closed by operating a handle on the front side.In addition, a back door 63 that can be opened and closed by operating a bracket is also provided on the back side of the housing 60.

[0040] A main monitor device 44 using a liquid crystal display with a touch panel is installed on the front side of the panel door 62, and an operation display unit 64 is located below it. The screen of the main monitor device 44 displays predetermined information related to tunnel disaster prevention monitoring.

[0041] A monitor device 46 using a liquid crystal display with a touch panel is disposed inside the housing 60. As shown in Fig. 3, when the panel door 62 of the disaster prevention receiving panel 10 is opened, the monitor device 46 disposed on a support frame 68 inside the housing 60 appears, and the current value measurement results and judgment results of the signal line can be displayed on the screen of the monitor device 46.

[0042] [Configuration of disaster prevention receiver] Figure 4 is a block diagram showing an outline of the functional configuration of the tunnel disaster prevention system. As shown in Figure 4, the disaster prevention receiving panel 10 is equipped with a control unit 40, whose functions are realized by, for example, executing a program, and the hardware used is a computer circuit equipped with a CPU, memory, various input / output ports including an AD conversion port, and the like.

[0043] The control unit 40 is provided with a P-type transmission unit 42 which connects various terminal devices installed inside the tunnel via P-type signal lines 12. The control unit 40 is also provided with a main monitor device 44, a monitor device 46, an alarm unit 48 equipped with a speaker, buzzer, alarm indicator lights, etc., a display unit 50 equipped with various indicator lights, and an operation unit 52 equipped with various switches. Furthermore, a P-type transmission unit 54 is provided which individually connects the IG slave station equipment 24, ventilation equipment 28, alarm display board equipment 30, radio rebroadcasting equipment 32, television monitoring equipment 34, lighting equipment 36, fire pump equipment 20, and cooling pump equipment 22 via P-type signal lines.

[0044] The control unit 40 is provided with the functions of a monitoring control unit 56 and a current monitoring unit 58 as functions realized by executing a program.

[0045] (Monitoring and Control Unit) The monitoring control unit 56 performs predetermined monitoring and control based on detection signals and operation signals from terminal devices such as the fire hydrant valve open / close detection switch 14 and manual reporting device 16 provided on the fire hydrant device 18 installed inside the tunnel, fire detectors, duct temperature detectors, and automatic valve devices.

[0046] Furthermore, when the monitoring control unit 56 receives a fire notification signal (fire signal), for example, by operating the manual notification device 16 provided in the fire hydrant device 18, it causes the alarm unit 48 to sound a main sound and displays a representative fire display on the display unit 50, and further displays a fire display and a manual notification section on the screen of the main monitor device 44, and also transmits a response signal to the fire hydrant device 18 to turn on the response lamp.

[0047] In addition, when the monitoring control unit 56 receives a fire hydrant start signal output by turning on the fire hydrant valve opening / closing detection switch 14 through the opening operation of the fire hydrant valve opening / closing lever provided on the fire hydrant device 18, it sends a pump start signal to the fire pump equipment 20 to control it to start up.

[0048] Furthermore, the monitoring control unit 56 controls other equipment, such as sending a manual notification signal to the remote monitoring and control equipment 26 via the IG substation equipment 24 to issue an alarm, displaying the fire notification area using the television monitoring equipment 34, displaying the fire notification in the manual notification area using the alarm display board equipment 30, ventilating the manual notification area using the ventilation equipment 28, and illuminating the manual notification area using the lighting equipment 36.

[0049] In addition, when the temperature inside the duct rises and the monitoring control unit 56 receives a temperature detection signal from the duct temperature detector, it outputs a pump start signal to the cooling pump equipment 22 and controls the cooling of the inside of the duct by spraying water from a head installed inside the duct.

[0050] In addition, the monitoring control unit 56 monitors for disconnection faults in the signal line 12, and when a disconnection fault is detected, the alarm unit 48 sounds a fault sound, the display unit 50 displays a fault representative display, and the main monitor device 44 displays the fault and the fault area on its screen.

[0051] The monitoring control unit 56 monitors the signal line 12 for a disconnection fault by connecting a termination resistor to the end of the signal line 12 and passing a disconnection monitoring current therethrough, and detects a disconnection fault when the disconnection monitoring current is cut off.

[0052] (Current monitoring section) The current monitoring unit 58 measures the current value of the signal line 12 connected to a terminal device equipped with a no-voltage a-contact switch including the fire hydrant valve open / close detection switch 14 and the manual reporting device 16, and determines that the current value is abnormal if the measured current value falls outside a threshold range determined by predetermined upper and lower limits, and controls the storage of the measurement result as a measurement history in a memory using a removable memory card. The current monitoring unit 58 measures the current value of the signal line 12, for example, by reading the detected voltage of a current detection resistor inserted in the signal line 12 after AD conversion, and then calculating the average current value measured for a predetermined period of time to eliminate the effects of noise.

[0053] Here, there are fixed-period measurement, automatic measurement, and manual measurement for measuring the current value by the current monitoring unit 58. Fixed-period measurement by the current monitoring unit 58 measures the current values ​​of all signal lines 12 sequentially at predetermined intervals, for example, once a day, and determines that the current value is abnormal if the measured current value falls outside a predetermined threshold range, and controls the measurement results to be stored in memory as a measurement history.

[0054] When the current monitoring unit 58 detects an automatic measurement operation by the monitor device 46, it sequentially measures the current values ​​flowing through all signal lines 12, and if the measured current value falls outside a predetermined threshold range, it determines that the current value is abnormal and controls the monitor device 46 to display the measurement results on its screen.

[0055] When the current monitoring unit 58 detects a manual measurement operation including the selection of a signal line by the monitor device 46, it measures the current value flowing through the selected signal line, and if the measured current value falls outside a predetermined threshold range, it determines that the current value is abnormal and controls the monitor device 46 to display the measurement result on its screen.

[0056] Furthermore, when the current monitoring unit 58 detects an operation to display the measurement history by the monitor device 46, it controls the monitor device 46 to display the measurement history of the current values ​​stored in the memory on the screen.

[0057] In addition, when the current monitoring unit 58 detects an operation to display the abnormality history by the monitor device 46, it extracts measurement history in which an abnormal current value has been determined from the measurement history of current values ​​stored in memory and controls the monitor device 46 to display the measurement history on the screen in chronological order.

[0058] [Current monitoring unit warns of abnormal current values] The current monitoring unit 58 provided in the control unit 40 of the disaster prevention receiving panel 10 determines whether there is a sign of an abnormal current value and outputs an early warning when the measured current value changes significantly within a predetermined threshold range for determining an abnormal current value.

[0059] The current monitoring unit 58 issues an abnormal current value warning as a representative warning on the screen of the main monitor device 44, and also displays detailed information on the screen of the monitor device 46, including the measurement results, the system indicating whether it is an up-track tunnel or an down-track tunnel, and the name of the device, such as a fire hydrant or manual reporting device, that is the target of the warning.

[0060] Here, the current monitoring unit 58 determines whether a current value abnormality is present, for example, (1) Determining the signs of abnormal current values ​​by setting the sign threshold range; (2) Predicting abnormal current values ​​based on the difference from the average current; (3) Predicting abnormalities in the current value based on the difference from the previous measurement. The system determines whether there is a sign of an abnormal current value based on one or a combination of these, and outputs a sign warning.

[0061] (Determining signs of abnormal current values ​​by setting the sign threshold range) Fig. 5 is a graph showing how to determine whether a current value is abnormal depending on the setting of the abnormality threshold range. Fig. 5 shows, for example, daily changes in current values ​​from a measurement history obtained by periodic measurements from the current day (the 1st) to the previous 18 days. For this current value measurement history, a lower limit Ith1 and an upper limit Ith4 are set for determining whether a current value is abnormal, and a lower limit Ith2 and an upper limit Ith3 are set within the threshold range Ith1 to Ith4 for determining whether a current value is abnormal.

[0062] As shown in FIG. 5, the current monitoring unit 58 sets a narrower predictive threshold range Ith2 to Ith3 within the threshold range Ith1 to Ith4 for determining an abnormal current value, and when the measured current value Ii falls outside the predictive threshold range Ith2 to Ith3, that is, Ith2 ≥ Ii > Ith1 or Ith4 > Ii ≥ Ith3 When this occurs, the system determines whether there is a sign of an abnormal current value and outputs a warning.

[0063] In Figure 5, the current value Ii measured by periodic measurement on the current day (day 1) has reached the upper warning limit Ith3, so the current monitoring unit 58 determines whether the measured current value is a warning of an abnormal current value and outputs a warning alarm.

[0064] (Detects signs of current abnormalities based on the difference from the average current) Fig. 6 is a graph showing the prediction of a current value abnormality based on the difference from the average current. As shown in Fig. 6, the current monitoring unit 58 obtains the past average current value Ia from the measurement history, and performs control to determine a current value abnormality and output a prediction warning if the difference ΔI between the measured current value Ii and the average current value Ia increases or decreases beyond a predetermined threshold ΔIth, provided that the current value Ii measured by periodic measurement on the current day (first day) is within the threshold range Ith1 to Ith4 for determining a current value abnormality.

[0065] In Figure 6, the difference ΔI between the current value Ii measured by periodic measurement on the current day (day 1) and the average current value Ia is greater than or equal to the threshold value ΔIth, so the current monitoring unit 58 determines whether the measured current value is a sign of an abnormal current value and outputs a sign warning.

[0066] (Detects signs of current abnormalities based on the difference from the previous current measurement) 7 is a graph showing the current value abnormality detection based on the difference from the previously measured current value. As shown in FIG. 7, the current monitoring unit 58 performs control to detect an abnormal current value and output an abnormal current warning when the difference ΔI between the current value Ii measured at the current time point (the first day) and the previously measured current value Ii-1 increases or decreases by more than a predetermined threshold ΔIth, provided that the current value Ii measured by the periodic measurement on the current day (the first day) is within the threshold range Ith1 to Ith4 for detecting an abnormal current value. Here, the difference ΔI between the current value Ii measured at the current time point and the previously measured current value Ii-1, which is obtained by the current monitoring unit 58, indicates the rate of change of the current value. This means that if the rate of change of the current value exceeds a predetermined threshold, an abnormal current value is detected and an alarm is issued.

[0067] (Measurement process for signal lines where a current abnormality has been detected) If the current monitoring unit 58 determines that the measured current value indicates a sign of an abnormal current value, it changes the normal measurement cycle of once a day to a shorter cycle, such as once an hour, and performs control to measure and store the current value flowing through the signal line for which a sign of an abnormal current value has been determined.

[0068] By shortening the measurement period for a signal line in which such an abnormal current value has been detected, it becomes possible to collect more detailed data in a short period of time and determine the trend in the current value after a sign of an abnormal current value has been detected.Furthermore, even if an abnormal current value actually occurs after a sign of an abnormal current value has been detected, the abnormal current value can be detected early and an alarm can be issued.

[0069] Furthermore, when a predetermined narrowing-down operation specifying a signal line determined to be a precursor to an abnormal current value is detected while a measurement history based on a short measurement period has been obtained for the signal line determined to be a precursor to an abnormal current value, the current monitoring unit 58 performs control to extract history information of the specified signal line from the measurement history and display it on the screen of the monitor device 46.

[0070] By narrowing down the measurement history to signal lines that have been determined to have signs of such current value abnormalities and displaying the measurement history on the screen of the monitor device 46, it is possible to know in detail the changes in the current value of signal lines that have been determined to have signs of current value abnormalities.

[0071] (Display of measurement record screen on monitor) FIG. 8 is an explanatory diagram showing the measurement record screen of the monitor device, which displays the measurement history based on periodic measurements, and shows an example in which the current monitoring unit 58 detects a sign of an abnormal current value and outputs a sign warning.

[0072] As shown in FIG. 8, when a representative warning of an abnormal current value is displayed on the screen of the main monitor device 44, as shown in FIG. 3, if the panel door 62 is opened and a predetermined screen operation is performed on the monitor device 46, a measurement record screen 72 is displayed on the monitor screen 70 by reading out the measurement history measured and stored by periodic measurement.

[0073] On the right side of the measurement record screen 72, a page display 74, page switching buttons 76 and 78, a file save button 80, and a memory removal button 82 are arranged.

[0074] By operating the page switching buttons 76 and 78, it is possible to switch pages of the measurement history detailed information 90. The file save button 80 instructs the measurement results to be stored in memory. The memory removal button 82 is operated when removing the memory that stores the current value measurement information from the disaster prevention receiving panel 10.

[0075] The detailed measurement history information 90 displayed in the center of the measurement record screen 72 shows an example of a current value abnormality sign judgment based on the sign threshold range setting described above in (1). Here, for line number 002, the measured value is 0.75 mA, which reaches the sign upper limit of 0.75 mA, so the sign judgment shows "NG" indicating a current value abnormality sign.

[0076] For line number 004, the measured value is 1.25 mA, which exceeds the upper abnormal limit of 1.00 mA, so the abnormality judgment displays "NG" indicating an abnormal current value. In this case, the measured value of 1.25 mA also exceeds the upper warning limit of 0.75 mA, so naturally the warning judgment displays "NG" indicating a warning.

[0077] Below the measurement record screen 72, a line selection button 84, a predictive line selection button 86, and an abnormal line selection button 88 are arranged.

[0078] When the line selection button 84 is operated, the display switches to a measurement record narrowing down screen 92 shown in FIG.

[0079] The measurement record narrowing screen 92 in FIG. 9 is provided with a system selection section 94, a device selection section 96, a section selection section 98, a confirm button 102, a cancel button 104, a page display 106, page switching buttons 108 and 110, and a close button 112.

[0080] The system selection unit 94 selects between an inbound line and an outbound line. The device selection unit 96 selects between manual notification, fire hydrant, and duct. The section selection unit 98 inputs a section number.

[0081] On the measurement record narrowing screen 92, if you want to narrow down the measurement record to, for example, "section 01 on the manual reporting device on the up line," set "up line" in the system selection section 94, "manual reporting" in the device selection section 96, and "01" in the section selection section 98, as shown in the figure, and then press the confirm button 102, and the corresponding narrowed down measurement record 114 will be displayed.

[0082] In this state, operating the cancel button 104 clears the refinement conditions and the refined measurement record 114. Operating the close button 112 also returns to the measurement record screen 72 of FIG.

[0083] By utilizing the functions of this measurement record filtering screen 92, it is possible to narrow down and display measurement records from the vast amount of stored measurement records by setting filtering conditions that combine systems, devices, and sections, making it possible to efficiently determine, for example, the line degradation status of a specific device that has experienced an abnormal current value.

[0084] As a narrowing-down condition for the measurement records, in addition to the system, device, and section, a period may be selected.

[0085] (Display of the measurement record screen of the symptom judgment line on the monitor) FIG. 10 is an explanatory diagram showing a predictor line measurement record narrowing screen that displays the measurement history of signal lines in which a predictor of an abnormal current value has been determined by shortening the measurement period.

[0086] On the measurement record screen 72 in Figure 8, when the predictive line selection button 86 is operated, the line number 002 in the measurement history details 90 for which a predictive current value anomaly has been determined is automatically specified, and the history information for the line number 002 for which a predictive current value anomaly has been determined is extracted from the stored measurement history, and the predictive line narrowing down screen 120 shown in Figure 10 is displayed.

[0087] The symptom line narrowing down screen 120, like the measurement record narrowing down screen 92 of Figure 9, has a system selection section 94, a device selection section 96, a section selection section 98, a confirm button 102, a cancel button 104, a page display 106, page switching buttons 108 and 110, and a close button 112, and in addition has a new measurement period display window 100, which displays "01 hours 00 minutes" as the measurement period that has been shortened due to the detection of a symptom of an abnormal current value.

[0088] The narrowed-down measurement record 122 on the symptom line narrowing-down screen 120 displays the current values ​​measured at short intervals of once per hour for line number 002, for which a symptom of an abnormal current value was determined in Figure 7, and allows you to see the detailed changes in the current value of the signal line with line number 002 after a symptom of an abnormal current value was determined.

[0089] [Another embodiment of the disaster prevention receiving panel] FIG. 11 is an explanatory diagram showing another embodiment of a disaster prevention receiving panel having a graphic panel, a display panel, and an operation panel on the front door panel, and FIG. 12 is an explanatory diagram showing the display panel of FIG. 11 taken out.

[0090] As shown in Figure 11, in the disaster prevention receiving panel 10 of this embodiment, the panel door 62 is provided with a graphic panel 130, a display panel 132, and an operation panel 134 instead of the main monitor device 44 provided in the disaster prevention receiving panel 10 of Figures 2 and 3.

[0091] The graphic panel 130 displays a tunnel system diagram, which divides the tunnel into sections for each P-type signal circuit and shows the layout of section indicator lights for fire hydrants and manual reporting devices. The operation panel 134 is also equipped with operation switches and emergency telephones required for tunnel disaster monitoring.

[0092] As shown in Figure 12, the display panel 132 has an arrangement of various indicator lights necessary for disaster prevention monitoring, and in response to the current monitoring function provided in the disaster prevention receiving panel 10, there are provided a current monitoring device measurement indicator 136, a current monitoring device failure indicator 138, a manual report current value abnormal indicator 140, a manual report current value abnormal indicator 142, a fire hydrant current value abnormal indicator 144, and a fire hydrant current value abnormal indicator 146.

[0093] The functional configuration of the disaster prevention receiving panel 10 according to this embodiment is the same as the functional configuration of the disaster prevention receiving panel 10 shown in Fig. 4 except for the main monitor device 44. Therefore, when the current monitoring unit of the disaster prevention receiving panel 10 determines, based on the above-mentioned (1) to (3), that there is a sign of an abnormal current value for, for example, the current value of a manual reporting device measured by periodic measurement, the current monitoring unit of the disaster prevention receiving panel 10 turns on the manual reporting current value abnormality indicator light 142 provided on the display panel 132 shown in Fig. 12 to display a representative indication of the abnormal current value together with the output of a predetermined alarm sound, and based on this, detailed information of the abnormal current value indication can be displayed on the screen of the monitor device 46 as shown in Fig. 8.

[0094] Furthermore, when the current monitoring unit of the disaster prevention receiving panel 10 determines that the current value of, for example, a manual reporting device measured by periodic measurement is abnormal, it lights up the manual reporting current value abnormality light 140 provided on the display panel 132 shown in Figure 12 to display a representative indication of the current value abnormality along with the output of a predetermined alarm sound, and based on this, detailed information about the current value abnormality can be displayed on the screen of the monitor device 46, as shown in Figure 8.

[0095] [Modifications of the present invention] 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]

[0096] 1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receiving panel 12, 12-1 to 12-n: signal line 14: Fire hydrant valve open / close detection switch 16:Manual notification device 18: Fire hydrant equipment 20: Fire pump equipment 22: Cooling pump equipment 24:IG slave station equipment 26: Remote monitoring and control equipment 28: Ventilation equipment 30: Alarm display board equipment 32: Radio rebroadcasting equipment 34: TV monitoring equipment 36: Lighting equipment 40: Control unit 42, 54: P-type transmission section 44: Main monitor device 46: Monitor device 48:Alarm section 52:Operation unit 56: Monitoring and control unit 58: Current monitoring section 60: Cabinet 62: Panel door 70:Monitor screen 72: Measurement record screen 92: Measurement record narrowing screen 120: Predictive line narrowing down screen 130: Graphics panel 132: Display panel 134: Operation panel 140: Manual notification current value abnormality lamp 142: Manual notification current value abnormality warning light 144: Fire hydrant current abnormality light 146: Fire hydrant current abnormality warning light

Claims

1. A disaster prevention system that performs predetermined monitoring control by a disaster prevention receiving panel by receiving a predetermined signal transmitted via a signal line from a terminal device arranged corresponding to a disaster prevention monitoring area, a current monitoring unit that monitors the current of a signal line to which a terminal device that transmits a signal by operating a non-voltage a-contact switch is connected; The current monitoring unit measuring the value of the current flowing through the signal line at a predetermined period; determining a degradation state of the signal line based on a current measurement result acquired by monitoring the current of the signal line; When it is determined that the deterioration state of the signal line is a sign of a current value abnormality that is predicted to lead to a state in which the current value flowing through the signal line becomes abnormal, the predetermined period is changed to a period shorter than the currently set period, and the current value flowing through the signal line that is determined to be a sign of a current value abnormality is measured; a second display unit different from a first display unit on which predetermined information related to disaster prevention monitoring is displayed, displays the current measurement results acquired at a cycle shorter than the predetermined cycle changed in accordance with the determination of the sign of the current value abnormality, together with information related to the changed cycle; A disaster prevention system characterized in that the first display unit and the second display unit are provided on a housing of the disaster prevention receiving panel which has a door that can be opened and closed by rotating around the front, the first display unit is arranged on the surface of the door which can be seen from the front of the housing when the door is closed, and the second display unit is arranged inside the housing where there is a possibility that the first display unit can be seen from a position where it cannot be seen when the door is open.

2. A disaster prevention system that performs predetermined monitoring control by a disaster prevention receiving panel by receiving a predetermined signal transmitted via a signal line from a terminal device arranged corresponding to a disaster prevention monitoring area, a current monitoring unit that monitors the current of a signal line to which the duct temperature detector is connected as the terminal device; The current monitoring unit measuring the value of the current flowing through the signal line at a predetermined period; determining a degradation state of the signal line based on a current measurement result acquired by monitoring the current of the signal line; When it is determined that the deterioration state of the signal line is a sign of a current value abnormality that is predicted to lead to a state in which the current value flowing through the signal line becomes abnormal, the predetermined period is changed to a period shorter than the currently set period, and the current value flowing through the signal line that is determined to be a sign of a current value abnormality is measured; a second display unit different from a first display unit on which predetermined information related to disaster prevention monitoring is displayed, displays the current measurement results acquired at a cycle shorter than the predetermined cycle changed in accordance with the determination of the sign of the current value abnormality, together with information related to the changed cycle; A disaster prevention system characterized in that the first display unit and the second display unit are provided on a housing of the disaster prevention receiving panel which has a door that can be opened and closed by rotating around the front, the first display unit is arranged on the surface of the door which can be seen from the front of the housing when the door is closed, and the second display unit is arranged inside the housing where there is a possibility that the first display unit can be seen from a position where it cannot be seen when the door is open.

3. A disaster prevention system that performs predetermined monitoring control by a disaster prevention receiving panel by receiving a predetermined signal transmitted via a signal line from a terminal device arranged corresponding to a disaster prevention monitoring area, a current monitoring unit that monitors the current of a signal line to which the fire hydrant valve open / close detection switch is connected as the terminal device; The current monitoring unit measuring the value of the current flowing through the signal line at a predetermined period; determining a degradation state of the signal line based on a current measurement result acquired by monitoring the current of the signal line; When it is determined that the deterioration state of the signal line is a sign of a current value abnormality that is predicted to lead to a state in which the current value flowing through the signal line becomes abnormal, the predetermined period is changed to a period shorter than the currently set period, and the current value flowing through the signal line that is determined to be a sign of a current value abnormality is measured; a second display unit different from a first display unit on which predetermined information related to disaster prevention monitoring is displayed, displays the current measurement results acquired at a cycle shorter than the predetermined cycle changed in accordance with the determination of the sign of the current value abnormality, together with information related to the changed cycle; A disaster prevention system characterized in that the first display unit and the second display unit are provided on a housing of the disaster prevention receiving panel which has a door that can be opened and closed by rotating around the front, the first display unit is arranged on the surface of the door which can be seen from the front of the housing when the door is closed, and the second display unit is arranged inside the housing where there is a possibility that the first display unit can be seen from a position where it cannot be seen when the door is open.

4. The disaster prevention system according to any one of claims 1 to 3, A disaster prevention system characterized in that, when it is determined that the current value is a sign of an abnormality, an alarm of an abnormality in the current value is output.

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