JP2022031856A - Disaster prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disaster prevention system that can detect a sign state and make an alarm before an abnormal state of a current value of a signal line is detected, and that makes it possible to grasp a detailed change in the current value after the sign state is detected.

SOLUTION: A disaster prevention system comprises a current monitoring unit 58, that is a control unit for outputting a fire alarm based on a predetermined signal related to a fire, which is transmitted from a terminal device via a signal line 12 and received by a monitoring control unit 56 of a disaster prevention receiving panel 10; for acquiring a current value flowing through the signal line 12 under a predetermined condition, and for detecting a current value abnormal state and a sign state of the current value abnormality based on the acquired current value. When the control unit detects the sign state of current value abnormality, the current monitoring unit 58 changes a predetermined condition to a condition different from that before detecting the sign state of the current value abnormality regarding the signal line 12 in which the sign state of the current value abnormality is detected.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a disaster prevention system for monitoring an abnormality in a disaster prevention monitoring area by connecting a terminal device such as a notification device or a detector installed corresponding to the disaster prevention monitoring area to a disaster prevention receiving panel.

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

Such emergency facilities are equipped with a fire detector, a manual notification device, an emergency telephone for fire monitoring and notification, a fire hydrant device for extinguishing a fire and preventing the spread of fire, and a tunnel frame. In order to protect the inside of the duct from fire, a water spray that sprinkles fire extinguishing water from the water spray head is installed, and a disaster prevention receiver is installed to monitor and control the terminal equipment of these emergency facilities to build a tunnel disaster prevention system. is doing.

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

By the way, in the P-type direct delivery type tunnel disaster prevention system, the terminal equipment such as the manual notification device, the fire hydrant activation device, and the duct temperature detector configures the signal output unit by operation or detection as a non-voltage a contact switch. A non-voltage a contact switch is connected to the signal line drawn from the disaster prevention receiver. The non-voltage a contact switch is normally turned off in the monitoring state, and is turned on by an operation or detection operation to output a non-voltage contact signal.

Specifically, the power supply voltage is applied to one of the signal lines from the disaster prevention receiving panel side via a pull-up resistor, and in the steady monitoring state where the non-voltage a contact switch is turned off, most of the current consumption flows in the signal line. However, the power supply voltage between the signal lines seen from the disaster prevention receiver is kept at approximately the power supply voltage. When the non-voltage a contact switch is turned on, current flows through the signal line, the voltage between the signal lines seen from the disaster prevention receiver drops to approximately zero volts, and the disaster prevention receiver increases the current consumption of the signal line or between the signal lines. Detects a voltage drop and outputs a received signal indicating the operation or detection of the terminal device to the control unit.

For example, in the case of a fire report signal from a manual report device, the disaster prevention receiver performs control operations such as fire display, lighting control of the response lamp on the terminal side, manual report section display, and output of the fire extinguishing pump start signal, and also performs remote monitoring. A fire alarm signal is transmitted to external equipment such as control equipment, TV monitoring equipment, variable road information board equipment, tunnel ventilation equipment, and lighting equipment so that predetermined response control can be performed.

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

In such a conventional P-type direct transmission type tunnel disaster prevention system, the insulation deteriorates due to aged deterioration of the signal line (outside line cable) connecting the terminal equipment, and the signal line connecting the terminal equipment. More current than expected in the normal monitoring state flows, and the disaster prevention receiver determines that the signal is received by the operation or detection operation of the terminal equipment and performs an alarm operation, as well as remote monitoring control equipment, TV monitoring equipment, and variable road. Information board equipment, tunnel ventilation equipment, lighting equipment, and other other equipment are often linked to close the tunnel.

By the way, in the conventional current monitoring device, when the current value for each signal line obtained by the constant cycle measurement deviates from the threshold range determined by the predetermined upper limit value and lower limit value, it is determined that the current value is abnormal and an alarm is given. However, it is assumed that fluctuations in the current value appear due to deterioration of the insulation of the signal line even before the abnormality in the current value is determined, and it is necessary to know the sign of such an abnormality in the current value at an early stage. If this is possible, it is expected that the current value will become abnormal in the near future, and it will be possible to prepare appropriate measures from an early stage.

INDUSTRIAL APPLICABILITY The present invention is a disaster prevention system that enables an alarm by capturing a sign state before a signal line abnormal state is detected, and also enables a detailed change in the current value after the sign state is detected. The purpose is to provide.

(Disaster prevention system)
The present invention
It is a disaster prevention system that outputs a fire alarm based on a predetermined signal related to a fire transmitted from a terminal device arranged corresponding to the disaster prevention monitoring area via a signal line and received by the monitoring control unit.
Collect the current value flowing through the signal line under the specified conditions,
Control to detect a current value abnormal state, which is an abnormal current value flowing through a signal line, and a predictive state of a current value abnormality, which is a state predicted to reach a current value abnormal state after a predetermined period, based on the collected current value. Equipped with a part
When the control unit detects the sign state of the current value abnormality, the control unit changes the predetermined condition to a condition different from that before detecting the sign state of the current value abnormality for the signal line in which the sign state of the current value abnormality is detected. It is characterized by changing.

(Display regarding current value)
When the control unit detects the sign state of the current value abnormality, the signal line in which the sign state of the current value abnormality is detected is set to the predetermined condition changed according to the detection of the sign state of the current value abnormality. Display information about the current value collected based on.

(Collecting current values in a predetermined cycle)
The control unit collects the current value in a predetermined cycle as a predetermined condition, and when the sign state of the current value abnormality is detected, the control unit applies the predetermined cycle to the signal line in which the sign state of the current value abnormality is detected. Change to a shorter cycle than before detecting the sign state of current value abnormality.

(Basic effect)
The present invention is a disaster prevention system that outputs a fire alarm based on a predetermined signal related to a fire transmitted from a terminal device arranged corresponding to the disaster prevention monitoring area via a signal line and received by a monitoring control unit. The current value flowing in the line is collected under predetermined conditions, and based on the collected current value, it is predicted that the current value abnormal state, which is an abnormality of the current value flowing in the signal line, and the current value abnormal state will be reached after the predetermined condition. A control unit for detecting a sign state of a current value abnormality, which is a state, is provided, and when the control unit detects a sign state of a current value abnormality, the control unit determines a predetermined signal line for which the sign state of the current value abnormality is detected. In order to change the conditions to conditions different from those before the current value abnormality sign state was detected, the current value abnormality sign state is changed before the current value abnormality state due to insulation deterioration of the signal line is detected. Knowing, it is possible to grasp the problem that the current value abnormal state is likely to be detected in the near future and take appropriate measures, and further, the collection cycle such as once a day is set for the current value abnormality. For the signal line in which the sign state is detected, the current value is collected by changing the collection cycle to, for example, once an hour, which is shorter than that, for a short time after the sign state of the current value abnormality is detected. It is possible to collect more information about the current value, and even if the current value abnormal state is detected after the sign state of the current value abnormality is detected, the current value abnormal state is detected at an early stage. be able to.

In addition, when the control unit is provided in the disaster prevention receiving board, the disaster prevention receiving board includes the function of the current monitoring device, so that the equipment configuration and processing become easier than when the current monitoring device is provided in a separate housing. , Installation space can also be reduced.

(Effect of display regarding current value)
Further, when the control unit detects the sign state of the current value abnormality, the control unit has changed the signal line in which the sign state of the current value abnormality is detected, which is changed in accordance with the detection of the sign state of the current value abnormality. Since the information about the current value collected based on the conditions is displayed, when the control unit detects the sign state of the current value abnormality, the predetermined condition is changed according to the detection of the sign state of the current value abnormality. By displaying the information related to the current value collected based on the above, it is possible to know the sign state of the current value abnormality, and by looking at the information related to the displayed current value as needed, it was detected as the sign state of the current value abnormality. It becomes possible to know the information of the signal line.

Explanatory diagram showing the outline of the tunnel disaster prevention system Explanatory drawing showing the appearance of the disaster prevention receiver Explanatory drawing showing the state where the panel door of the disaster prevention receiver is opened and the monitor device can be seen. Block diagram showing the outline of the functional configuration of the tunnel disaster prevention system Graph diagram showing the sign judgment of current value abnormality by setting the sign threshold range Graph diagram showing the sign judgment of current value abnormality due to the difference from the average current Graph diagram showing the sign judgment of current value abnormality due to the difference from the current value of the previous measurement Explanatory diagram showing the measurement recording screen of the monitor device displaying the measurement history by constant cycle measurement Explanatory diagram showing the measurement record narrowing down screen of the monitor device that displays the measurement history extracted by setting the narrowing down conditions. The figure which showed the sign line narrowing screen of the monitor device which displays the measurement history obtained by shortening the measurement cycle for the signal line where the sign of the current value abnormality was judged. Explanatory drawing showing another embodiment of the disaster prevention receiver board provided with the graphic panel, the display panel and the operation panel on the front door panel. Explanatory drawing showing by taking out the display panel of FIG.

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

Inside the up line tunnel 1a and the down line tunnel 1b, fire hydrant devices 18 are installed along the wall surface of the observer passage in the longitudinal direction of the tunnel, for example, at intervals of 50 meters.

The fire hydrant device 18 houses a hose with a nozzle inside the fire hydrant door. In the event of a fire, the fire hydrant door is opened to pull out the hose with a nozzle, and when the fire hydrant valve open / close lever is opened, fire hydrant water is discharged and the fire hydrant valve open / close detection is detected. The switch 14 is turned on to start the fire extinguishing pump.

Further, the fire hydrant device 18 is provided with a notification device door, and the notification device door is provided with a manual notification device (transmitter) 16. As described above, the fire hydrant device 18 is provided with a fire hydrant valve open / close detection switch 14 and a manual notification device 16 as terminal devices, and by turning on the non-voltage a contact switch that functions as a contact means, the fire hydrant start signal and the fire are generated. A notification signal is output.

The fire hydrant device 18 is provided with a pump start switch used 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, the following will be applied. This will be described as a fire hydrant valve open / close detection switch (including a pump start switch) 14. Further, the manual notification device 16 is installed in the emergency telephone box in addition to the fire hydrant device 18, but in the following description, the manual notification device provided in the fire hydrant device 18 will be described as a representative.

In addition to the fire hydrant device 18, a fire detector, an automatic valve device, a temperature detector in a duct, and the like are provided as tunnel emergency equipment, but the illustration is omitted.

Fire detectors are installed along the wall surface in the longitudinal direction of the tunnel, for example, at intervals of 25 meters or 50 meters, and monitoring areas are set on both sides, which are 25 meters or 50 meters to the left and right, to detect the flame caused by the fire and notify the fire. ..

The automatic valve device constitutes a water spray facility, and the main valve is opened and driven by remote opening control of the electric valve for operation, and fire extinguishing water is discharged from multiple water spray heads installed in the longitudinal direction at the top of the tunnel wall surface. Protect the tunnel frame from fire.

The temperature detector in the duct is placed in the duct where the pipes and cables are laid inside the observer passage in the longitudinal direction of the tunnel, and it detects the temperature rise in the duct due to a cable fire or the like and functions as a contact means. A temperature detection signal is output when the a-contact switch is turned on.

A disaster prevention receiving board 10 is installed in the monitoring center of the up line tunnel 1a and the down line tunnel 1b. In addition to the disaster prevention monitoring function of the up line tunnel 1a and the down line tunnel 1b, the disaster prevention receiving board 10 is provided with a current monitoring function for monitoring the current of the P-type signal line to which the terminal device is connected.

From the disaster prevention receiving panel 10, P-type signal lines 12-1 to 12-n are pulled out from the disaster prevention receiving panel 10 in each predetermined section divided in the longitudinal direction of the tunnel in the up line tunnel 1a and the down line tunnel 1b, and are provided in each section. A plurality of fire hydrant valve open / close detection switches 14 and a manual notification device 16 are connected.

Similarly, for the temperature detector in the duct installed in the duct, a P-type signal line is pulled out in each section, and a plurality of temperature detectors in the duct provided in each section are connected. However, the illustration is omitted. Further, the signal lines 12-1 to 12-n may be referred to as a signal line 12 when it is not necessary to distinguish them.

The P-type signal line 12 is composed of a signal line and a common line, and is connected to a non-voltage a contact switch provided in each of the fire extinguishing valve valve open / close detection switch 14, the manual notification device 16, and the temperature detector in the duct of the fire extinguisher device 18. In this case, the non-voltage a contact switch is turned on by each operation or detection operation to pass the line current, so that the fire extinguishing plug start signal, the fire notification signal, and the temperature detection signal are sent to the disaster prevention receiving panel 10.

In addition to the fire extinguishing plug device 18, fire detector and automatic valve device, the emergency facilities of the tunnel include fire extinguishing pump equipment 20, cooling pump equipment 22 for ducts, IG slave station equipment 24, ventilation equipment 28, and alarm display board equipment. 30, radio rebroadcasting equipment 32, TV monitoring equipment 34, lighting equipment 36, etc. are provided, and except that the IG slave station equipment 24 is connected by a data transmission line, the other equipment is disaster-prevented by a P-type signal line. It is individually connected to the receiving panel 10. Here, the IG slave station equipment 24 is a communication equipment that connects the disaster prevention receiving panel 10 and the remote monitoring and control equipment 26, which is a higher-level equipment provided outside, via the network 25.

The ventilation facility 28 is a facility that gives energy to the air in the tunnel by a high blowing wind speed due to the operation of a jet fan installed on the ceiling side in the tunnel to cause an air flow in the longitudinal direction of the tunnel.

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

[Disaster prevention receiver monitor device]
2A and 2B are explanatory views showing the appearance of the disaster prevention receiver, FIG. 2A shows the front side, and FIG. 2B shows the side surface. FIG. 3 is an explanatory diagram showing a state in which the panel door of the disaster prevention receiver is opened so that the monitor device can be seen.

As shown in FIG. 2, the disaster prevention receiving board 10 is provided with a panel door 62 that can be opened and closed by operating a handle on the front surface of a box-shaped housing 60 opened in the front and rear, and also on the back surface of the housing 60. , A back door 63 that can be opened and closed by bundle operation is provided.

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 arranged below the main monitor device 44. Predetermined information regarding tunnel disaster prevention monitoring is displayed on the screen of the main monitor device 44.

Inside the housing 60, a monitor device 46 using a liquid crystal display with a touch panel is arranged. As shown in FIG. 3, when the panel door 62 of the disaster prevention receiver 10 is opened, the monitor device 46 arranged on the support frame 68 appears in the housing 60, and the current value of the signal line is measured on the screen of the monitor device 46. The result and the judgment result can be displayed.

[Disaster prevention receiver configuration]
FIG. 4 is a block diagram showing an outline of the functional configuration of the tunnel disaster prevention system. As shown in FIG. 4, the disaster prevention receiving panel 10 includes a control unit 40, and the control unit 40 is a function realized by executing a program, for example, and the hardware includes various inputs including a CPU, a memory, and an AD conversion port. Use a computer circuit or the like equipped with an output port or the like.

The control unit 40 is provided with a P-type transmission unit 42 in which various terminal devices installed in the tunnel are connected by a P-type signal line 12, and the control unit 40 is provided with a main monitor device 44 and a monitor device. 46, an alarm unit 48 equipped with a speaker, a buzzer, an alarm indicator light, etc., a display unit 50 equipped with various indicator lights, an operation unit 52 equipped with various switches, and further, an IG slave station facility 24, a ventilation facility 28, A P-type transmission unit 54 is provided in which the alarm display board equipment 30, the radio rebroadcasting equipment 32, the television monitoring equipment 34, the lighting equipment 36, the fire extinguishing pump equipment 20, and the cooling pump equipment 22 are individually connected by a P-type signal line. There is.

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

(Monitoring and control unit)
The monitoring control unit 56 detects from terminal devices such as a fire hydrant valve open / close detection switch 14 and a manual notification device 16, a fire detector, a temperature detector in a duct, and an automatic valve device provided in a fire hydrant device 18 installed in a tunnel. Performs predetermined monitoring and control based on signals and operation signals.

Further, when the monitoring control unit 56 receives a fire notification signal (fire signal) operated by the manual notification device 16 provided in the fire hydrant device 18, for example, the alarm unit 48 sounds the main sound and the display unit 50 displays the fire representative. The display is performed, and further, a fire display and a manual notification section display are performed on the screen of the main monitor device 44, and a response signal is transmitted to the fire hydrant device 18 to control the lighting of the response lamp.

Further, when the monitoring control unit 56 receives the fire hydrant start signal output when the fire hydrant valve open / close detection switch 14 is turned on by opening the fire hydrant valve open / close lever provided in the fire hydrant device 18, the fire hydrant pump equipment 20 starts the pump. Controls to send a signal and activate it.

Further, the monitoring control unit 56 controls the other equipment by transmitting a manual notification signal to the remote monitoring control equipment 26 via the IG slave station equipment 24 to give an alarm, and the TV monitoring equipment 34 displays the fire notification section. , The alarm display board equipment 30 controls to display the fire report of the manual report section, the ventilation facility 28 controls to ventilate the manual report section, and the lighting facility 36 controls to illuminate the manual report section.

Further, when the temperature inside the duct rises and the temperature detection signal is received from the temperature detector inside the duct, the monitoring control unit 56 outputs a pump start signal to the cooling pump equipment 22 and sprinkles water from the head installed in the duct. Controls to cool the inside of the duct.

Further, the monitoring control unit 56 monitors the disconnection failure of the signal line 12, and when the disconnection failure is detected, the alarm unit 48 sounds the failure sound and the display unit 50 displays the failure representative, and the main monitor device 44. Display obstacles and areas with obstacles on the screen of.

In the monitoring of the disconnection failure of the signal line 12 by the monitoring control unit 56, a terminating resistor is connected to the end of the signal line 12 to pass the disconnection monitoring current, and the disconnection failure is detected when the disconnection monitoring current is interrupted.

(Current monitoring unit)
The current monitoring unit 58 measures the current value of the signal line 12 to which the terminal device equipped with the non-voltage a contact switch including the fire extinguishing valve open / close detection switch 14 and the manual notification device 16 is connected, and the measured current value is a predetermined upper limit. When the current value abnormality is out of the threshold range determined by the value and the lower limit value, the measurement result is controlled to be stored in a memory using a detachable memory card as a measurement history. The current value of the signal line 12 is measured by the current monitoring unit 58, for example, the detection voltage of the current detection resistor inserted in the signal line 12 is AD-converted and read to eliminate the influence of noise, and the current value is measured for a predetermined time. Calculate the average value of.

Here, the current value measurement by the current monitoring unit 58 includes fixed cycle measurement, automatic measurement, and manual measurement. The constant cycle measurement of the current monitoring unit 58 sequentially measures the current values of all the signal lines 12 at predetermined cycles, for example, once a day, and when the measured current values deviate from the predetermined threshold range, the current is measured. Control is performed to determine a value abnormality and store the measurement result in the memory as a measurement history.

In the automatic measurement of the current value by the current monitoring unit 58, when the automatic measurement operation by the monitoring device 46 is detected, the current values flowing through all the signal lines 12 are sequentially measured, and the measured current value is out of the predetermined threshold range. If this is the case, an abnormality in the current value is determined, and the measurement result is controlled to be displayed on the screen of the monitor device 46.

In the manual measurement of the current value by the current monitoring unit 58, when a manual measurement operation including the selection of the signal line by the monitoring device 46 is detected, the current value flowing through the selected signal line is measured, and the measured current value is predetermined. When the current value is out of the threshold range of, the current value abnormality is determined, and the measurement result is controlled to be displayed on the screen on the monitor device 46.

Further, when the current monitoring unit 58 detects the measurement history display operation by the monitor device 46, the current monitoring unit 58 controls the monitor device 46 to display the measurement history of the current value stored in the memory on the screen.

Further, when the current monitoring unit 58 detects the abnormality history display operation by the monitoring device 46, the current monitoring unit 58 extracts the measurement history in which the current value abnormality is determined from the measurement history of the current value stored in the memory and monitors the monitoring device 46. Controls the screen display in chronological order.

[Predictive warning of current value abnormality by current monitoring unit]
The current monitoring unit 58 provided in the control unit 40 of the disaster prevention receiving panel 10 determines a sign of a current value abnormality when the measured current value changes significantly within a predetermined threshold range for determining a current value abnormality. Controls to output a sign alarm.

The current value abnormality sign alarm by the current monitoring unit 58 is a measurement result as detailed information of the current value abnormality sign alarm on the screen of the monitor device 46 while displaying the current value abnormality sign alarm on the screen of the main monitor device 44 as a representative. At the same time, the system indicating whether it is an up line tunnel or a down line tunnel, and the device name such as a fire hydrant or a manual notification device targeted for a sign alarm are displayed.

Here, the sign determination of the current value abnormality by the current monitoring unit 58 is, for example, (1) the sign determination of the current value abnormality by setting the sign threshold range.
(2) Judgment of a sign of current value abnormality due to the difference from the average current,
(3) Judgment of a sign of current value abnormality due to the difference from the current value measured last time,
There is, and the sign of the current abnormal value is determined by any one or a combination of two or more, and the sign alarm is output.

(Predictive judgment of current value abnormality by setting the sign threshold range)
FIG. 5 is a graph showing a sign determination of a current value abnormality by setting a sign threshold range. FIG. 5 shows, for example, the diurnal change of the current value of the measurement history obtained by the fixed cycle measurement from the present day (1 day) to 18 days before that. A lower limit value Is1 and an upper limit value Is4 for determining a current value abnormality are set for such a current value measurement history, and a current value is within the range of the threshold range Is1 to Is4 for determining a current value abnormality. A sign lower limit value Is2 and a sign upper limit value Is3 for determining a sign of abnormality are set.

As shown in FIG. 5, the current monitoring unit 58 sets a narrower predictive threshold range Is2 to Is3 within the threshold range Is1 to Is4 for determining the current value abnormality, and the measured current value Ii is the predictive threshold range. When it deviates from Is2 to Is3, that is,
Is2 ≧ Ii> Is1 or Is4> Ii ≧ Is3
When becomes, the control is performed to determine the sign of the current value abnormality and output the sign alarm.

In FIG. 5, the current value Ii measured by the fixed cycle measurement on the current day (1st day) has reached the upper limit of the sign Is3, and therefore, the current monitoring unit 58 has the current value of the measured current value. A sign of abnormality is determined and a sign alarm is output.

(Determination of sign of current value abnormality based on the difference from the average current)
FIG. 6 is a graph showing a sign determination of a current value abnormality due to a 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 the current value Ii measured by the fixed cycle measurement on the current day (first day) determines the current value abnormality. When the difference ΔI between the measured current value Ii and the average current value Ia increases or decreases beyond the predetermined threshold value ΔIth on condition that the current value is within the range of the threshold range Is1 to Is4, the sign of the current value abnormality is determined. Then, control is performed to output a sign alarm.

In FIG. 6, the difference ΔI between the current value Ii and the average current value Ia measured by the constant cycle measurement on the current day (1st day) is equal to or greater than the threshold value ΔIth. Therefore, the current monitoring unit 58 is used. With respect to the measured current value, the sign of an abnormal current value is determined and a sign alarm is output.

(Determination of sign of current value abnormality based on the difference from the current value measured last time)
FIG. 7 is a graph showing a sign determination of a current value abnormality due to a difference from the current value measured in the previous measurement. As shown in FIG. 7, the current monitoring unit 58 indicates that the current value Ii measured by the constant cycle measurement on the current day (day 1) is within the threshold range Is1 to Is4 for determining the current value abnormality. As a condition, when the difference ΔI from the previously measured current value Ii-1 increases or decreases beyond a predetermined threshold value ΔIth, the sign of the current value abnormality is determined and the sign alarm is output. Here, the difference ΔI between the current value Ii measured this time and the current value Ii-1 measured last time, which is obtained by the current monitoring unit 58, indicates the rate of change of the current value, which is the rate of change of the current value. It means that when the value exceeds a predetermined threshold value, a sign of a current value or more is determined and an alarm is given.

(Measurement processing of signal line for which a sign of current value abnormality is determined)
When the current monitoring unit 58 determines that the measured current value is a sign of an abnormality in the current value, the current monitoring unit 58 changes the normal measurement cycle once a day to a shorter cycle, for example, once an hour. , Control is performed to measure and store the current value flowing through the signal line where the sign of the current value abnormality is determined.

By shortening the measurement cycle of the signal line in which such a current value abnormality is determined, after the sign of the current value abnormality is determined, more detailed data is collected in a short time to determine the transition of the current value. In addition, even if a current value abnormality occurs after a sign of a current value abnormality is determined, the current value abnormality can be determined at an early stage and an alarm can be given.

Further, the current monitoring unit 58 designates a predetermined signal line in which the sign of the current value abnormality is determined in a state where the measurement history with a short measurement cycle is obtained for the signal line in which the sign of the current value abnormality is determined. When the narrowing operation is detected, the history information of the designated signal line is extracted from the measurement history and controlled to be displayed on the screen of the monitoring device 46.

By narrowing down to the signal line where the sign of the current value abnormality is determined and displaying the measurement history on the screen of the monitor device 46, it is possible to know in detail the change in the current value of the signal line determined to be the sign of the current value abnormality. Can be done.

(Display of measurement recording screen on the monitor)
FIG. 8 is an explanatory diagram showing a measurement recording screen of a monitor device that displays a measurement history by constant cycle measurement, and is an example of a case where a sign of a current value abnormality is determined by the current monitoring unit 58 and a sign alarm is output. Shows.

As shown in FIG. 8, when a representative display of a sign alarm of a current value abnormality is displayed on the screen of the main monitor device 44 on the monitor screen 70, the panel door 62 is opened to monitor as shown in FIG. When a predetermined screen operation is performed by the device 46, the measurement recording screen 72 is displayed by reading out the measurement history measured and stored by the constant cycle measurement.

On the right side of the measurement recording screen 72, a page display 74, a page switching button 76, 78, a file save button 80, and a memory eject button 82 are arranged.

By operating the page switching buttons 76 and 78, it is possible to switch the page of the measurement history detailed information 90. The file save button 80 instructs to store the measurement result in the memory. The memory eject button 82 is operated when the memory in which the current value measurement information is stored is ejected from the disaster prevention receiving panel 10.

The measurement history detailed information 90 displayed in the center of the measurement recording screen 72 takes as an example the sign determination of the current value abnormality by setting the sign threshold range in (1). Here, in the line number 002, the measured value is 0.75 mA, and the upper limit of the sign has reached 0.75 mA. Therefore, the sign of the current value abnormality is indicated by the display of "NG" in the sign determination. Has been done.

Further, in the line number 004, the measured value is 1.25 mA, which exceeds the abnormal upper limit value of 1.00 mA. Therefore, the current value abnormality is indicated by the display of "NG" in the abnormality determination. .. In this case, since the measured value of 1.25 mA exceeds the sign upper limit value of 0.75 mA, naturally, the sign is indicated by the display of “NG” in the sign determination.

A line selection button 84, a sign line selection button 86, and an abnormal line selection button 88 are arranged on the lower side of the measurement recording screen 72.

When the line selection button 84 is operated, the display can be switched to the measurement record narrowing screen 92 shown in FIG.

The measurement record narrowing screen 92 of FIG. 9 includes a system selection unit 94, a device selection unit 96, a section selection unit 98, a confirmation button 102, a release button 104, a page display 106, page switching buttons 108 and 110, and a closing button 112. It is provided.

The system selection unit 94 selects from an up line and a down line. The device selection unit 96 selects from manual notification, fire hydrant, and duct. The section selection unit 98 inputs a section number.

On the measurement record narrowing screen 92, for example, when it is desired to narrow down to the measurement record of "section 01 in the manual notification device for the upstream line", as shown in the figure, the system selection unit 94 is "up line" and the device selection unit 96 is "up line". When "manual notification" and "01" are set in the section selection unit 98 and the confirmation button 102 is operated, the corresponding narrowing measurement record 114 is displayed.

When the release button 104 is operated in this state, the narrowing condition and the narrowing measurement record 114 are cleared. Further, when the close button 112 is operated, the process returns to the measurement recording screen 72 of FIG.

By using the function of the measurement record narrowing screen 92, the measurement records can be narrowed down and displayed by setting the narrowing conditions in combination with the system, the device, and the section from the huge number of stored measurement records. This makes it possible to efficiently determine, for example, the line deterioration status of an appropriate device that has caused an abnormality in the current value.

As the conditions for narrowing down the measurement records, a period may be selected in addition to the system, device, and section.

(Display of measurement recording screen of sign judgment line by monitor)
FIG. 10 is an explanatory diagram showing a sign line measurement record narrowing screen that displays the measurement history of a signal line in which a sign of a current value abnormality is determined by shortening the measurement cycle.

On the measurement recording screen 72 of FIG. 8, when the sign line selection button 86 is operated, the line number 002 in which the sign of the current value abnormality is determined in the measurement history details 90 is automatically specified and stored in the measurement history. The history information of the line number 002 in which the sign of the current value abnormality is determined is extracted from the inside, and the sign line narrowing screen 120 shown in FIG. 10 is displayed.

Similar to the measurement record narrowing screen 92 of FIG. 9, the sign line narrowing screen 120 has a system selection unit 94, a device selection unit 96, a section selection unit 98, a confirmation button 102, a release button 104, a page display 106, and a page switching button. 108, 110, and a close button 112 are provided, and in addition to this, a measurement cycle display window 100 is newly provided, and "01 hours 00 minutes" is displayed as a measurement cycle shortened in the prediction determination of a current value abnormality. There is.

In the narrowing measurement record 122 of the sign line narrowing screen 120, the current value measured in a short cycle once an hour is displayed as the measured value for the line number 002 in which the sign of the current value abnormality is determined in FIG. 7. It is possible to see a detailed change in the current value of the signal line of the line number 002 after the sign of the current value abnormality is determined.

[Other embodiments of disaster prevention receiver]
FIG. 11 is an explanatory diagram showing another embodiment of the disaster prevention receiving panel provided with 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. ..

As shown in FIG. 11, in the disaster prevention receiving board 10 of the present embodiment, the panel door 62 has a graphic panel 130 instead of the main monitor device 44 provided in the disaster prevention receiving board 10 of FIGS. 2 and 3. A display panel 132 and an operation panel 134 are provided.

A tunnel system diagram is displayed on the graphic panel 130, and in the system diagram, the inside of the tunnel is divided into P-type signal lines, and a fire hydrant and a division indicator light of a manual notification device are arranged. Further, the operation panel 134 is provided with an operation switch and an emergency telephone necessary for tunnel disaster prevention monitoring.

As shown in FIG. 12, the display panel 132 is arranged with various indicator lights necessary for disaster prevention monitoring, and is measuring the current monitoring device in response to the current monitoring function provided in the disaster prevention receiving panel 10. A lamp 136, a current monitoring device failure lamp 138, a manual notification current value abnormality lamp 140, a manual notification current value abnormality sign lamp 142, a fire hydrant current value abnormality lamp 144, and a fire hydrant current value abnormality precursor lamp 146 are provided.

The functional configuration of the disaster prevention receiving board 10 according to the present embodiment is the functional configuration of the disaster prevention receiving board 10 shown in FIG. 4 excluding the main monitor device 44, and has the same functions other than that. Therefore, when the current monitoring unit of the disaster prevention receiver 10 determines a sign of an abnormality in the current value based on the above-mentioned (1) to (3) with respect to the current value of, for example, the manual notification device measured by the fixed cycle measurement, The manual notification current value abnormality sign lamp 142 provided on the display panel 132 shown in FIG. 12 is turned on to display the sign of the current value abnormality as a representative together with the output of a predetermined alarm sound, and based on this, as shown in FIG. The detailed information of the sign of the current value abnormality can be displayed on the screen of the monitor device 46.

Further, when the current monitoring unit of the disaster prevention receiving panel 10 determines that the current value is abnormal with respect to the current value of, for example, the manual notification device measured by the constant cycle measurement, the manual notification unit provided on the display panel 132 shown in FIG. 12 is provided. The current value abnormality lamp 140 is turned on to display the current value abnormality as a representative together with the output of a predetermined alarm sound, and based on this, as shown in FIG. 8, the detailed information of the current value abnormality is displayed on the screen of the monitor device 46. Can be done.

[Modified example of the present invention]
The present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receiver 12, 12-1 to 12-n: Signal line 14: Fire extinguishing valve valve open / close detection switch 16: Manual notification device 18: Fire extinguishing device 20: Fire extinguishing pump equipment 22: Cooling pump equipment 24: IG slave station equipment 26: Remote monitoring 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 unit 44: Main monitor device 46: Monitor device 48: Alarm unit 52: Operation unit 56: Monitoring control unit 58: Current monitoring unit 60: Housing 62: Panel door 70: Monitor screen 72: Measurement recording screen 92: Measurement recording Filtering screen 120: Predictive line narrowing screen 130: Graphic panel 132: Display panel 134: Operation panel 140: Manual notification current value abnormality light 142: Manual notification current value abnormality Predictor light 144: Fire extinguisher current value abnormality light 146: Fire extinguishing plug current value abnormality Predictive light

Claims (3)

It is a disaster prevention system that outputs a fire alarm based on a predetermined signal related to a fire transmitted from a terminal device arranged corresponding to the disaster prevention monitoring area via a signal line and received by the monitoring control unit.
The current value flowing through the signal line is collected under predetermined conditions, and the current value is collected.
Based on the collected current value, the current value abnormal state, which is an abnormality of the current value flowing through the signal line, and the predictive state of the current value abnormality, which is a state in which it is predicted that the current value abnormal state will be reached after a predetermined time. Equipped with a control unit to detect
When the control unit detects the sign state of the current value abnormality, the signal line in which the sign state of the current value abnormality is detected is before detecting the sign state of the current value abnormality under the predetermined conditions. A disaster prevention system characterized by changing to different conditions.
The disaster prevention system according to claim 1.
When the control unit detects the sign state of the current value abnormality, the signal line in which the sign state of the current value abnormality is detected is changed in accordance with the detection of the sign state of the current value abnormality. A disaster prevention system characterized by displaying information on the current value collected based on predetermined conditions.
The disaster prevention system according to claim 1 or 2.
The control unit collects the current value in a predetermined cycle as the predetermined condition, and when the precursor state of the current value abnormality is detected, the signal line in which the precursor state of the current value abnormality is detected is detected. A disaster prevention system characterized in that the predetermined cycle is changed to a shorter cycle than before the precursor state of the current value abnormality is detected.

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