JP2024032930A - disaster prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately determine the necessity of cleaning by grasping contamination states of translucent windows which are provided correspondingly to both right-side and left-side monitoring areas.

SOLUTION: A disaster prevention system for monitoring occurrence of a fire in a monitoring area by disposing a fire detection device for each boundary of a plurality of continued monitoring areas, comprises a display unit which displays information relating to the fire detection device, and a control unit which causes the display unit to display the information. The fire detection device detects a first window contamination degree indicating a contamination state of a first translucent window and a second window contamination degree indicating a contamination state of a second translucent window. On the basis of the first window contamination degree and the second window contamination degree, the control unit causes the display unit to display a pair of the first window contamination degree and the second window contamination degree in the order of disposing a plurality of fire detection devices in such a manner that the first window contamination degree of one fire sensor and the second window contamination degree of the other fire sensor, the fire sensors being respectively disposed in adjacent boundaries, are displayed side by side.

SELECTED DRAWING: Figure 7

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a disaster prevention system that monitors fires in monitoring areas divided at predetermined intervals in the longitudinal direction of a tunnel using a fire detection device connected to a signal line drawn out from a disaster prevention receiver.

Traditionally, in tunnels such as motorways, fire detection devices have been installed to monitor fires in order to protect people and vehicles from fire accidents that occur inside the tunnels, and are connected to signal lines drawn out from disaster prevention receiver panels. ing.

The fire detection device is installed at the boundary of the monitoring area divided into, for example, 25m intervals or 50m intervals along the longitudinal direction of the tunnel.The fire detection device has detection areas in both left and right directions, and fire detection devices placed adjacent to each other The equipment is redundantly monitoring fires in the same monitoring area.

The fire detection device is equipped with translucent windows on the left and right corresponding to the left and right monitoring areas, and through the translucent windows it monitors radiation, such as infrared rays, from the fire flames generated inside the tunnel. .

Fire detection devices installed in tunnels are equipped with translucent windows to maintain the flame monitoring function, as dirt on translucent windows increases over time due to the adhesion of pollutants floating in the environment. The translucent windows are monitored for dirt, and the translucent windows are cleaned at regular intervals.

To monitor dirt on translucent windows, test light is periodically emitted from a test light source installed in the fire detection device, enters the translucent window via the detection output area side space outside the detector, and is received by the light receiving element. The light reception level at this time is compared with that at the initial non-contamination time to find the light attenuation rate as the degree of contamination, and when the degree of contamination exceeds a predetermined threshold, a contamination signal is sent to the disaster prevention receiver and a contamination alarm is output. I'm letting you do it. When a contamination alarm is output from a fire detection device, it is necessary to clean the translucent window of the fire detection device that has become contaminated.

Further, a contamination sign threshold value lower than the contamination threshold value is set, and when the degree of contamination exceeds the contamination sign threshold value, a contamination sign signal is sent to the disaster prevention receiver panel to output a contamination sign alarm. Regarding contamination warnings for fire detection devices, if the number of fire detection devices that have become contamination warning increases and the period until regular cleaning is scheduled is long, measures such as revising the plan such as moving the cleaning schedule forward may be taken. becomes possible.

By the way, as a method of monitoring the contamination of the fire detection device using the disaster prevention receiver, the degree of progress of the contamination state such as normal, contamination sign, and contamination is displayed in order in the tunnel length direction based on the degree of contamination detected by the fire detection device. As a result, it is possible to grasp the degree of contamination and the tendency of contamination of the fire detection device in the entire tunnel (Patent Document 1).

Japanese Patent Application Publication No. 2000-315285 Japanese Patent Application Publication No. 2002-063664

By the way, in a disaster prevention system that displays the degree of contamination progress in the tunnel length direction, such as normal, contamination sign, and contamination, based on the degree of contamination detected by a fire detection device using a disaster prevention receiver, fire detection The device does not distinguish between the contamination status of the right translucent window and the left translucent window, which are provided corresponding to the left and right monitoring areas, and the degree of contamination of both translucent windows must reach the contamination precursor threshold. If either translucent window exceeds the contamination threshold, it is considered to be a contamination sign.Furthermore, if either translucent window exceeds the contamination threshold, it is determined to be contamination, and the contamination state is determined. The degree of progress is displayed in order of tunnel length.

This kind of display of the dirt status of the fire detection device by the disaster prevention receiver is to check the necessity of cleaning the translucent window installed in the fire detection device. When considering the necessity of cleaning and planning cleaning work, it may not necessarily be efficient to display the degree of progress of the contamination state in the order of tunnel length (order of arrangement). Furthermore, in conventional disaster prevention systems, the state of dirt is displayed without distinguishing between the left and right translucent windows, so there is a possibility that the need for cleaning cannot be accurately determined.

For example, even if the degree of contamination is displayed in the order of the longitudinal direction of the tunnel, it is necessary to visually search for which detection device requires cleaning or which cleaning is more urgent.

Also, for example, if a fire detection device installed in a tunnel is contaminated, one side of the translucent windows installed on the left and right may become contaminated more quickly than the other, depending on the direction of the airflow flowing inside the tunnel. Therefore, for example, even if one translucent window of a certain fire detection device is in a state of signs of contamination, the other translucent window may be normal (not contaminated or only slightly contaminated); In such a case, the fire detection device's translucent window will be displayed on the disaster prevention receiver as being in a sign of deterioration, and in this case, the level of emergency is higher than if both translucent windows are in a sign of deterioration. However, it is not possible to understand this immediately and it is not efficient.

In addition, even if the translucent window of one of the fire detection devices that monitors the same monitoring area becomes dirty in adjacent fire detection devices that monitor the same monitoring area redundantly, If the translucent window of the other fire detection device monitoring the same monitoring area is in a normal state, the monitoring function for that monitoring area is maintained by monitoring through the translucent window of the fire detection device that is in a normal state. If this is known, there will be relatively more time to clean the fire detection device that has become dirty. In this case, the contaminated fire detection device must be cleaned more quickly than necessary, and there remains a possibility that the necessity of cleaning cannot be appropriately determined.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disaster prevention system that can grasp the dirtiness of translucent windows provided corresponding to the monitoring areas on both the left and right sides of a fire detection device and appropriately determine the necessity of cleaning. shall be.

(Disaster prevention monitoring system)
The present invention is a disaster prevention system that monitors the occurrence of fire in a monitoring area by arranging a fire detection device at each boundary of a plurality of continuous monitoring areas,
a display section that displays information regarding the fire detection device;
a control unit that displays information on a display unit;
Equipped with
The fire detection device is
comprising a first light-transmitting window and a second light-transmitting window corresponding to each of the mutually adjacent monitoring areas in contact with the border of the monitoring area in which the fire detection device is arranged;
By receiving light rays from each of the mutually adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window, determining the presence or absence of a fire outbreak in each of the monitoring areas,
A first window contamination degree indicating the contamination state of the first translucent window corresponding to one of the mutually adjacent monitoring areas, and a contamination state of the second translucent window corresponding to the other mutually adjacent monitoring area. detecting the degree of contamination of the second window shown;
The control section is
Based on the degree of contamination of the first window and the degree of contamination of the second window detected by the plurality of fire detection devices, the display unit displays one window that corresponds to the same monitoring area that is placed on the adjacent boundary and is being monitored redundantly. The first window stain degree of one fire detection device and the second window stain degree of the other fire detection device are set so that the first window stain degree of one fire detection device and the second window stain degree of the other fire detection device are aligned. , display the arrangement of multiple fire detection devices in the order in which they are arranged,
As the first window contamination degree and the second window contamination degree, when the degree of contamination does not reach a predetermined contamination sign threshold, a normal state is identified and displayed, and when the degree of contamination has reached the contamination sign threshold, a contamination sign state is displayed. The present invention is characterized in that the soiling state is distinguished and displayed when the degree of soiling has reached a predetermined soiling threshold that is higher than the soiling precursor threshold.

The present invention provides fire detection in a disaster prevention system in which a plurality of fire detection devices arranged at the boundaries of monitoring areas divided at predetermined intervals along a predetermined direction are connected to a signal line drawn out from a receiving device. The device receives radiation from two monitoring areas through the corresponding translucent windows, converts it into an electrical signal, and based on the electrical signal, determines whether there is a fire in the corresponding monitoring area. A fire determination unit that transmits a fire determination signal to a receiving device, and detects a first window contamination degree indicating a contamination state of one translucent window and a second window contamination degree indicating a contamination state of the other translucent window. and a contamination detection unit that transmits contamination degree detection signals according to these to the receiving device, and the receiving device includes a fire monitoring control unit that receives a fire judgment signal from the fire detection device and issues an alarm, and a plurality of fire detection units. It is equipped with a dirt display control unit that displays the first window dirt level and the second window dirt level received from the device in a predetermined order, so that, for example, a monitoring area divided at predetermined intervals along the longitudinal direction of a tunnel can be displayed. In the case of multiple fire detection devices that are installed at the boundary and monitor fires in the monitoring area corresponding to the first and second translucent windows, the receiving device detects the first window installed in the multiple fire detection devices. By displaying the degree of contamination and the degree of contamination of the second window in a predetermined order, for example, the degree of contamination such as normal, sign of contamination, and deterioration can be grasped for each of the first and second translucent windows, and the degree of contamination of the translucent window can be determined. It is possible to appropriately judge the necessity of cleaning.

(Effect of displaying the left window and right window in descending order of degree of contamination)
In addition, the contamination display control unit of the receiving device displays the first window contamination degree and the second window contamination degree of the plurality of fire detection devices in descending order of contamination degree, so that the contamination degree of the fire detection device is the first one. The first and second translucent windows are displayed in descending order of degree of contamination, and the degree of contamination of the translucent window that requires cleaning is displayed first, so that the need for cleaning can be determined appropriately. It is possible to judge.

(Effect of displaying the degree of contamination of the left window and right window in combination)
Further, the stain display control unit displays the first window stain degree displayed in descending order of the stain degree in combination with the corresponding second window stain degree, and displays the second window stain degree displayed in descending order of the stain degree. For example, the second window stain degree of the same fire detection device is displayed in combination with the corresponding first window stain degree, so that, for example, the second window stain degree of the same fire detection device is displayed in descending order of the stain degree. By displaying the information, it is possible to appropriately judge the necessity of cleaning in consideration of the first and second degrees of contamination.

(Effects of displaying the degree of contamination in the order in which fire detection devices are arranged)
In addition, the contamination display control unit of the receiving device displays the combination of the first window contamination degree and the second window contamination degree of the plurality of fire detection devices in the order in which the plurality of fire detection devices are arranged. A pair of first and right window contamination degrees is displayed along the direction in which the fire detection devices are lined up, and the necessity of cleaning is determined by considering the first and second contamination degrees corresponding to the placement position in the tunnel. Make it possible to make appropriate decisions.

(Effect of displaying the degree of contamination of the left window and the right window in a mixed manner in descending order of degree of contamination)
In addition, since the contamination display control unit of the receiving device displays the first window contamination degree and the second window contamination degree of multiple fire detection devices in a mixed manner in descending order of contamination degree, the first window contamination degree and By arranging and displaying the degree of contamination of the second window in descending order of degree of contamination, it is possible to grasp the translucent window that requires the most cleaning, and appropriately determine the necessity of cleaning.

(Effects of displaying the degree of contamination of monitoring areas that are monitored repeatedly in order)
In addition, the contamination display control unit of the receiving device is configured to display a plurality of fire detection devices so that the degree of contamination of one of the fire detection devices and the degree of contamination of the other fire detection device that monitor the same monitoring area are aligned adjacently. Since the combination of the first window stain degree and the second window stain degree of fire detection devices is displayed in the order in which multiple fire detection devices are arranged, redundant monitoring by two adjacent fire detection devices is not possible. The relationship between the degree of contamination of one and the degree of contamination of the other for each translucent window for the same monitoring area can be easily and reliably determined. If the degree of contamination is within the normal level, redundant monitoring cannot be performed on that monitoring area, but it is being normally monitored by the other fire detection device whose degree of contamination is at the normal level, and the degree of contamination of one fire detection device is within the normal level. Even if the level of contamination is reached, it can be determined that there is no urgent need for cleaning, and the necessity for cleaning can be appropriately determined.

(Identification of contamination signs and contamination by fire detection device and effects of identification display on receiving device)
Further, the contamination detection unit of the fire detection device transmits a contamination sign signal indicating a contamination sign state to the receiving device when the first window contamination degree or the second window contamination level reaches a predetermined contamination sign threshold, and When the first window contamination degree or the second window contamination level contamination reaches a predetermined contamination threshold higher than the contamination precursor threshold, a contamination signal is transmitted to the receiving device, and the contamination display control section of the receiving device receives the contamination precursor signal. The corresponding left window stain level or right window stain level is made to identify and display the sign of staining, and the first window stain level or second window stain level that corresponds to the stain signal is made to identify and display the stain state. When the degree of contamination of the first window and the degree of contamination of the second window are divided and displayed in descending order of degree of contamination, the highest degree of contamination displayed at the beginning indicates whether the degree of contamination is in the contamination state or in the sign of contamination. It can be easily grasped by identification display, and it is possible to more appropriately judge the necessity of cleaning when displayed in descending order of degree of contamination.

(Effects of signs of contamination, determination of contamination, and identification display at the receiving device)
In addition, when the first window dirt level or the second window dirt level has reached a predetermined dirt sign threshold, the dirt display control unit of the receiving device causes the first window dirt level or the second window dirt level to become a dirt sign state. When the first window fouling level or the second window fouling level reaches a predetermined fouling threshold higher than the fouling sign threshold, the fouling state is identified as the first window fouling level or the second window fouling level. Because of the display, it is easy to understand whether a large degree of contamination is in a state of contamination or a sign of contamination by the respective identification display, and the need for cleaning is displayed in descending order of degree of contamination. This makes it possible to make more appropriate judgments.

Further, by centrally determining the contamination precursor state and the contamination state in the receiving device, it is possible to reduce the processing load on the fire detection device side.

An explanatory diagram showing an overview of the disaster prevention system according to the present invention, taking fire monitoring in a tunnel as an example. Explanatory diagram showing the warning areas inside the tunnel that are monitored redundantly by fire detection equipment Block diagram showing an overview of the functional configuration of the fire detection device Explanatory diagram showing the appearance of the fire detection device Block diagram showing an overview of the functional configuration of the disaster prevention reception panel Explanatory diagram showing a list of contamination information stored in the memory of the disaster prevention receiver Explanatory diagram showing the first embodiment of stain indication Explanatory diagram showing a second embodiment of soiling display Explanatory diagram showing a third embodiment of soiling display Explanatory diagram showing a fourth embodiment of soiling display Explanatory diagram showing a fifth embodiment of soiling display Explanatory diagram showing other display forms according to the fifth embodiment Explanatory diagram showing other display forms according to the fifth embodiment

[Overview of disaster prevention system]
FIG. 1 is an explanatory diagram showing an overview of a disaster prevention system according to the present invention, taking tunnel fire monitoring as an example. As shown in FIG. 1, an upline tunnel 1a and a downline tunnel 1b are constructed as tunnels for a motorway.

Inside the up-line tunnel 1a and the down-line tunnel 1b, fire detection devices 16 are installed at intervals of, for example, 50 meters along the wall surface in the longitudinal direction of the tunnel. The fire detection device 16 has two sets of light-receiving sections with translucent windows on the left and right sides, so that it has monitoring areas on both the left and right sides of the up and down sides of the tunnel longitudinal direction. The fire detection devices are arranged consecutively so that the monitoring areas overlap with those of adjacent fire detection devices.

A fire detection device 16 is connected to the power supply and signal lines 12a, 12b connected to the uplink tunnel 1a and the downlink tunnel 1b from the disaster prevention receiving board 10 which functions as a receiving device. The addresses are set in advance in the order in which they are arranged. Note that instead of the address, a unique ID (identifier) may be set in the fire detection device 16 in the order of arrangement.

FIG. 2 is an explanatory diagram showing a monitoring area in a tunnel that is redundantly monitored by a fire detection device, and takes the upline tunnel 1a in FIG. 1 as an example.

As shown in FIG. 2, fire detection devices 16 are installed along the tunnel side wall of the upline tunnel 1a at intervals of, for example, 50 meters. This divides the inside of the tunnel into monitoring areas AR1, AR2, . . . ARi-1, ARi, ARi+1, . Each monitoring area has a size of, for example, 50 m in the longitudinal direction x 20 m in the transverse direction.

The fire detection device 16 includes a left window light receiving section equipped with a left side light-transmitting window (first window) and a right window light receiving section equipped with a right side light-transmitting window (second window) for monitoring the left and right monitoring areas individually. A section has been established. Here, in this embodiment, the left-right relationship of the fire detection device 16 is determined based on the state in which the fire detection device 16 is viewed from the front.

For example, the i-th fire detection device 16 placed at the left end of the monitoring area ARi and the i+1-th fire detection device 16 placed at the right end detect the monitoring area ARi using the right window light receiving section of the i-th fire detection device 16. At the same time, the same monitoring area ARi is being monitored redundantly by the left window light receiving section of the i+1th fire detection device 16.

Note that the first monitoring area AR1 on the tunnel entrance side is independently monitored by the left window light receiving section of the first fire detection device 16.

The fire detection device 16 monitors the fire by observing radiation, such as infrared rays, from the flames caused by a fire that occurred in the left or right monitoring area using the left window light receiving section, and also monitors the fire by observing it using the right window light receiving section. When a fire is detected, a fire signal including a preset unique address and identification information indicating whether left window detection or right window detection is detected is sent to the disaster prevention receiving board 10.

In addition, the fire detection device 16 independently detects contamination of the translucent window provided in the light receiving section once a day, for example, on the left and right sides, and determines whether the detected degree of contamination is the left window detection or the right window detection. A contamination detection signal including identification information indicating the identity is transmitted to the disaster prevention receiving board 10.

Furthermore, when the periodically detected degree of contamination exceeds a predetermined contamination sign threshold, the fire detection device 16 sends a contamination sign signal including defacement sign information and identification information indicating whether left window detection or right window detection is detected. When the degree of contamination exceeds a predetermined contamination threshold, a contamination signal containing contamination information and identification information indicating whether left window detection or right window detection is being detected is transmitted to disaster prevention reception panel 10.

[Fire detection device]
FIG. 3 is a block diagram showing an outline of the functional configuration of the fire detection device, and FIG. 4 is an explanatory diagram showing the external appearance of the fire detection device.

As shown in FIG. 3, the fire detection device 16 includes a left window fire detection section 16L and a right window fire detection section 16R. As shown in the left window fire detection section 16L, a light receiving section including a light receiving sensor 38a, 38b, amplification processing sections 40a, 40b corresponding to these, a control section 34, and a transmission section 35. A left translucent window 36L provided on the detector cover is arranged in front of the light receiving sections 38a, 38b, and light energy from the external monitoring area is transferred to the light receiving sections 38a, 38b through the left translucent window 36L. is incident on.

Further, in order to monitor the staining of the left translucent window 36L, a stain detection section including a test light source section 42, a stain light receiving section 44, and an amplification section 46 is provided.

Here, as shown in FIG. 4, the fire detection device 16 includes a left side light-transmitting window 36L and a right side light-transmitting window 36R in the sensor housing section 54 provided at the top of the housing 52. The light receiving sections of the left window fire detection section 16L and the right window fire detection section 16R shown in FIG. 3 are arranged inside the transparent window 36L and the right translucent window 36R, respectively. Further, two sets of test light source transmissive windows 56 housing individual test light source sections 42 are provided near the left translucent window 36L and the right translucent window 36R at positions where the light receiving section can be seen through. .

Referring again to FIG. 3, the right window fire detection section 16R has the same configuration as the left window fire detection section 16L, but the control section 34 is provided as a unit common to both, and includes, for example, a CPU, memory, and various other hardware components. A computer circuit or the like with input/output ports, etc. is used. Further, the control unit 34 is provided with a fire determination unit 48 and a stain processing unit 50 as functions realized by executing a program.

The left window fire detection section 16L monitors fire using, for example, a two-wavelength flame detection principle. The light receiving unit 38a uses an optical wavelength band-pass filter to collect radiation of 4.4 to 4.5 μm, which is a resonance radiation band of CO ₂ peculiar to flames, from the light energy incident through the left translucent window 36L. After selectively transmitting the radiation, the energy of the radiation is photoelectrically converted by a light receiving sensor, and then a predetermined processing such as amplification is performed by the amplification processing section 40a to generate a light receiving signal corresponding to the amount of energy and output to the control section 34.

The light receiving section 38b selectively transmits radiant energy of 5 to 6 μm out of the light energy incident through the left translucent window 36L through an optical wavelength band pass filter, and detects the energy of the radiation with a light receiving sensor. After performing photoelectric conversion, the amplification processing section 40b performs predetermined processing such as amplification, and outputs it to the control section 34 as a received light signal corresponding to the amount of energy.

The fire determination unit 48 provided in the control unit 34 determines the presence or absence of flame by, for example, taking the relative ratio of the light reception signal levels output from the amplification processing units 40a and 40b and comparing it with a predetermined threshold value. If a fire is detected based on the presence determination, the transmission unit 35 is instructed to include fire determination information and identification information indicating left window detection in a response message to a call message that matches the self-address from the disaster prevention receiver 10. By setting, control is performed to transmit a fire determination signal to the disaster prevention receiving board 10.

The contamination detection section, which is composed of the test light source section 42, the contamination light receiving section 44, and the amplification section 46, detects the test light source section 42 at a predetermined period, for example, once a day, according to instructions from the contamination processing section 50 of the control section 34. A predetermined test light is emitted in a blinking manner and enters the contamination light receiving section 44 through the left translucent window 36L, and this test light is converted into an electrical signal by the light receiving sensor provided in the contamination light receiving section 44 and amplified. The contamination detection signal is amplified by the section 46 and outputted to the control section 34 in accordance with the degree of contamination of the left translucent window 36L.

When the contamination detection signal from the amplification unit 46 is obtained, the contamination processing unit 50 of the control unit 34 compares the contamination detection signal level recorded in advance with no contamination and the contamination detection signal level obtained by contamination processing. The degree of contamination is detected by calculating the current rate. Defacement detection is performed by instructing the control unit 34 about the detected degree of defacement and setting defacement information indicating the value of the defacement degree and identification information indicating left window detection in a response message to a call message that matches the self address. Control is performed to transmit a signal to the disaster prevention receiving board 10.

The above contamination detection by the contamination processing unit 50 is carried out in response to a regular (for example, once a day) contamination treatment implementation instruction signal from the disaster prevention receiver 10, and the contamination detection signal is returned as a response signal. It can also be done as follows.

Further, when the detected degree of contamination exceeds a predetermined contamination sign threshold, the contamination processing unit 50 of the control unit 34 instructs the transmission unit 35 to send a call message (or a previous contamination message) that matches its own address. By setting the defacement sign information and the identification information indicating left window detection in the response message to the processing execution instruction signal), control is performed to send the defacement sign signal to the disaster prevention receiver 10.

Here, when attaching a degree of defacement to the defacement information transmitted to the disaster prevention receiver 10, the comparison process with the defacement sign threshold and the determination of the defacement sign may be performed on the disaster prevention receiver 10 side. In this case, the contamination sign threshold is set and registered in the disaster prevention receiver 10.

Further, when the degree of contamination based on the contamination detection signal from the amplification unit 46 exceeds a predetermined contamination threshold higher than the contamination precursor threshold, the contamination processing unit 50 of the control unit 34 instructs the transmission unit 35 to By setting defacement information and identification information indicating detection of the left window in the calling message that matches the self-address from the receiver 10, control is performed to send it as a defacement signal to the disaster prevention receiver 10.

In addition, when attaching a degree of defacement to the defacement information transmitted to the disaster prevention receiving board 10, the comparison process with a defacement threshold value and the determination of defacement may be performed on the disaster prevention receiving board 10 side. In this case, the stain threshold is set and registered in the disaster prevention receiver 10.

Here, the contamination processing unit 50 of the control unit 34 determines the light attenuation rate of the left translucent window 36L that indicates the degree of contamination based on the contamination detection signal from the amplification unit 46, and uses this light attenuation rate as the degree of contamination for disaster prevention reception. In addition to transmitting the information to the board 10, a process for determining signs of contamination and contamination is performed.

Calculation of the light attenuation rate of the left translucent window 36L by the contamination processing unit 50 uses the level of the contamination detection signal at the time of shipment from the factory when the left translucent window 36L is not soiled, at the start of fire monitoring, or at the end of cleaning as a reference level. Each time a contamination detection signal of detection level E is obtained from the amplifying section 46, the light attenuation rate D is calculated as D=1-(E/Er).
Calculated as

The light attenuation rate D calculated in this way is a value that changes in proportion to the degree of contamination of the translucent window 36, and in the following explanation, the light attenuation rate will be explained as the degree of contamination.

In addition, the contamination sign threshold used by the contamination processing unit 50 to determine a contamination sign is such that although the left translucent window 36L is slightly soiled, fire monitoring of the entire monitoring area by the light receiving units 38a and 38b can be maintained ( A predetermined first contamination level (which can detect a fire of a predetermined size) is set, for example, a light attenuation rate of 75 percent.

Furthermore, the contamination threshold value used in the contamination processing unit 50 to determine contamination is a predetermined second contamination level higher than the first contamination level, such as a light attenuation rate of 85, at which the entire monitoring area cannot be monitored by the light receiving unit. Set to percent.

Such processing by the stain detection section 50 is the same for stains on the right translucent window 36R.

[Disaster prevention receiver]
FIG. 5 is a block diagram schematically showing the functional configuration of the disaster prevention receiver. As shown in FIG. 5, the disaster prevention reception panel 10 includes a control unit 18, and the control unit 18 is a function realized by executing a program, for example, and is provided with the functions of a fire monitoring control unit 31 and a defacement display control unit 32. . Further, as the hardware of the control unit 18, a computer circuit having a CPU, memory, various input/output ports, etc. is used.

Transmission units 20a and 20b are provided for the control unit 18, and fire detection devices 16 installed in the upstream tunnel 1a and the downstream tunnel 1b are connected to signal lines 12a and 12b drawn out from the transmission units 20a and 20b, respectively. Multiple devices are connected.

Further, for the control unit 18, an alarm unit 22 equipped with a speaker, an alarm indicator light, etc., a display unit 24 equipped with a liquid crystal display, etc., a printer 25, an operation unit 26 equipped with various switches, etc., and an IG that communicates with external monitoring equipment. A modem 28 is provided to connect slave station equipment, and an IO section 30 is further provided to which ventilation equipment, alarm display board equipment, radio rebroadcast equipment, camera monitoring equipment, lighting equipment, and fire pump equipment are connected.

The fire monitoring control unit 31 of the disaster prevention receiver 10 repeatedly transmits a call message containing a polling command that sequentially specifies the address of the fire detection device 16 via the transmission units 20a and 20b, and the fire detection device 16 uses its own address. When receiving a call message matching the above, it returns a response message containing detection information such as the degree of contamination detected immediately before, a sign of contamination, contamination, etc., and identification information indicating whether left window detection or right window detection.

Incidentally, when the fire monitoring control section 31 of the disaster prevention reception panel 10 determines that a fire has occurred by receiving the message from the fire detection device 16, it instructs the alarm section 22 to output a fire alarm, and also instructs the IO section 30 to output a fire alarm. Allow other equipment to perform interlock control.

[Contamination monitoring using disaster prevention receiver]
(Collection and memory of defacement information)
The defacement display control unit 32 of the disaster prevention receiver 10 stores the figure in the memory of the control unit 18 based on the defacement degree information set in the response message received from the fire detection device 16 and the identification information of left window detection or right window detection. Contamination information 100 of the fire detection device 16 shown in 6 is stored.

The contamination information 100 stored in the memory in FIG. 6 corresponds to the address of the fire detection device 16, and the left window contamination level LDi detected by the left window fire detection unit 16L in FIG. The left window contamination degree RDi is stored. Note that i indicates an arbitrary address of the fire detection device 16.

Here, if the tunnel lengths of the up-line tunnel 1a and the down-line tunnel 1b shown in FIG. 100, a case is taken as an example in which the left window dirt levels LD01 to LD20 and the right window dirt levels RD01 to RD20 are stored corresponding to addresses 01 to 20 set for 20 fire detection devices 16. Furthermore, the left window staining degrees LD01 to LD20 and the right window staining degrees RD01 to RD20 are analog values indicating the light attenuation rate of the light-transmitting window.

When a predetermined operation for checking the soiling state is performed using the operation section 26, the soiling display control section 32 displays the left window soiling degree and the right window soiling degree corresponding to the address based on the soiling information 100 in FIG. The list is displayed on the liquid crystal display of the display unit 24 in a predetermined order, and the printer 25 is controlled to print out the list.

Further, the defacement display control unit 32 of the disaster prevention reception panel 10 may display a list of the left window defacement degree and the right window defacement degree corresponding to the address on the liquid crystal display of the display unit 24 based on the defacement information 100 of FIG. When printing is performed by the printer 25, control is performed to distinguish and display the left window stain degree and the right window stain degree by color coding or the like in accordance with stain signs and stains.

An embodiment of display control of stain information by the stain display control section 32 is as follows.

(First embodiment of defacement display)
FIG. 7 is an explanatory diagram showing a first embodiment of soiling display. As shown in FIG. 7, the defacement display 102 of this embodiment by the defacement display control unit 32 of the disaster prevention receiver 10 is based on the defacement information 100 shown in FIG. Displayed separately. Although the display is performed for each up line and down line, only the up line side is illustrated.

The left window contamination information 102 arranges left window contamination degrees LDi in descending order of contamination degree in correspondence with the address Ai of the upstream fire detection device 16. In addition, the right window stain information 104 arranges the right window stain degrees RDi in descending order of the stain degrees corresponding to the addresses Ai of the fire detection device 16.

Regarding the left window defacement information 102, the left window defacement degree LD15 of the first address 15 with the maximum defacement degree is a defaced state as shown by diagonal lines, since a defacement signal has been received from the corresponding fire detection device 16. It is identified that it is located in In addition, the left window contamination degrees LD09, LD04, and LD12 of addresses 09, 04, and 12, which have the second to fourth contamination degrees, are shown as sand because a contamination sign signal has been received from the corresponding fire detection device 16. This indicates that there is a sign of contamination.

Regarding the right window defacement information 104, the right window defacement degree RD07 of the first address 07 with the maximum defacement degree indicates that the right window is defaced as shown by diagonal lines because the defacement signal has been received from the corresponding fire detection device 16. The status is identified and displayed. In addition, the left window contamination degrees RD01 and RD09 of the addresses 01 and 09, which have the second to third contamination degrees, are signs of contamination, as shown by the sandy area, because a contamination sign signal has been received from the corresponding fire detection device 16. The status is identified and displayed.

The identification of the soiled state or the soiled state is made by using a predetermined color for the background or text of the corresponding display area. For example, a state of contamination is identified by red, and signs of contamination are identified by yellow.

By looking at the display of the left window stain information 102 and the right window stain information 104 arranged in descending order of degree of stain, the need for cleaning of the fire detection device 16 at address 15 for the left translucent window is increased. On the right translucent window, it can be seen at a glance that the need for cleaning is increasing for the fire detection device 16 at address 07, and in particular, both of them are in a dirty state indicated by diagonal lines, that is, the light attenuation rate is low. Since it has reached 85% and it is no longer possible to monitor the entire warning area, it can be determined that cleaning is even more necessary.

On the other hand, the fire detection devices 16 at addresses 09, 04, and 12 for the left translucent window, and the fire detection devices 16 at addresses 01 and 15 for the right translucent window detect the contamination sign state indicated by the sandy ground, that is, the The light rate is less than 85%, but has reached 75%, and it can be determined that the need for cleaning is the next highest.

(Second embodiment of defacement display)
FIG. 8 is an explanatory diagram showing a second embodiment of soiling display. As shown in FIG. 8, the dirt display of this embodiment by the dirt display control unit 32 of the disaster prevention receiver 10 is different from the left window dirt degree LDi of the left window dirt display 102 shown in FIG. The right window contamination degree RDi is displayed in combination. Although the display is performed for each up line and down line, only the up line side is illustrated.

Furthermore, the left window stain degree LDi of the left window stain display 102 shown in FIG. 7 is displayed in combination with the right window stain degree RDi in the same fire detection device 16.

For example, the left window stain degree LD15 of address 15, which has the highest degree of stain in the left window stain display 102, is displayed in combination with the right window stain degree RD15 of the same address 15. Here, the left window stain level LD15 at address 15 is in a dirty state, so it is displayed with diagonal lines, and the right window stain level RD15 at the same address 15 is in a sign of staining, so it is shown in sand. Identification is displayed.

In this case, the left window pollution level LD15 at address 15 is in a dirty state with a light attenuation rate reaching 85%, and the right window pollution level RD15 at address 15 has a light attenuation rate of less than 85% but 75%. It can be seen at a glance that the fire detection device 16 at address 15 is in a state of sign of contamination, and that the need for cleaning is considerably high.

This point is the same for the case where the right window dirt display 104 is used as the base, and the right window dirt level LL07 of the same address 07 is set to the right window dirt level RD07 of address 07, which has the highest dirt level in the right window dirt display 104. Displayed in combination. Here, since the right window dirt level RD07 of address 07 is in a dirty state, an identification display shown with diagonal lines is performed, and the left window dirt level LD07 of the same address 07 has a low dirt level and is in a normal state. It can be understood at a glance. Here again, it can be seen at a glance that the fire detection device 16 at address 15 is in considerable need of cleaning.

(Third embodiment of defacement display)
FIG. 9 is an explanatory diagram showing a third embodiment of soiling display. As shown in FIG. 9, the defacement display 106 of the present embodiment by the defacement display control unit 32 of the disaster prevention reception panel 10 displays the left window defacement degree LDi and the right window defilement degree RDi in the order of the address i of the fire detection device 16. The groups are displayed side by side. Although the display is performed for each up line and down line, only the up line side is illustrated.

In addition, similarly to FIGS. 7 and 8, the degree of contamination in the contamination state is identified and displayed as shown by diagonal lines, and the degree of contamination in the state of sign of contamination is identified and displayed as shown in sand, and the degree of contamination is This makes it possible to intuitively grasp the progress of contamination without looking at analog values.

Here, the identification display of the contamination state and the contamination sign state is performed for the left window contamination degree LDi and the right window contamination degree RDi that are in the contamination or contamination sign state, but the corresponding address i is also displayed in the contamination state. Or an identification display indicating signs of contamination is provided. As for this identification display, for example, when the left window dirt level LD15 is a dirt state and the right window dirt level RD15 is a dirt sign state, as in address 15, priority is given to the identification display of the dirt state for the higher dirt level LD15. Is going.

Such a contamination display 106 reads and displays the contamination information 100 stored in the memory shown in FIG. The degree of contamination of the left and right translucent windows in each fire detection device 16 is determined in the order in which the devices 16 are arranged, and the necessity of cleaning can be determined.

(Fourth embodiment of defacement display)
FIG. 10 is an explanatory diagram showing a fourth embodiment of soiling display. As shown in FIG. 10, the stain display 108 of this embodiment by the stain display control unit 32 of the disaster prevention receiver 10 displays the left window stain degree LDi and the right window stain degree RDi in a mixed manner in descending order of stain degree. The address of the defacement display 108 displays an address iL or iR, which is a combination of the address i of the fire detection device 16 and the identification code L indicating the left window fire detection section or the identification code indicating the right window fire detection section. There is. Although the display is performed for each up line and down line, only the up line side is illustrated.

In this example, the left window deterioration level LD15 at address 15L is the highest, and the next is the right window deterioration degree RD07 at address 07R, and both are diagonally lined identification indicating that they are defaced, but the fire detection device at address 15 It can be determined that cleaning is more necessary for No. 16.

(Fifth embodiment of defacement display)
FIG. 11 is an explanatory diagram showing a fifth embodiment of soiling display. As shown in FIG. 11, the defacement display 110 of the present embodiment by the defacement display control unit 32 of the disaster prevention receiver 10 indicates the degree of defacement of the left window of the i-th fire detection device 16 that monitors the same monitoring area ARi redundantly. Control is performed to display them in the order of address i so that LDi and the right window contamination level RLi+1 of the i+1th fire detection device 16 are arranged adjacently. Although the display is performed for each up line and down line, only the up line side is illustrated.

For example, the fire detection device 16 at address 01 and the fire detection device 16 at address 02 monitor the same monitoring area AR12 redundantly, so the right window pollution level RD01 at address 01 and the left window pollution level RD01 at address 02 The LD2s are arranged adjacent to each other. This relationship holds true for other fire detection devices 16 that monitor the same monitoring area adjacently.

In addition, similar to FIGS. 7 and 8, the degree of contamination in the contamination state is identified and displayed as shown by diagonal lines, and the degree of contamination in the state of sign of contamination is identified and displayed as shown by sandy areas, and the analogue of the degree of contamination is This makes it possible to grasp the progress of contamination at a glance without looking at the values.

According to such a contamination display 110, one degree of contamination corresponds to each translucent window (fire detection unit) for the same monitoring area that is redundantly monitored by two adjacent fire detection devices 16. The relationship between the degree of contamination and the degree of contamination of the other can be easily and reliably understood. For example, the right window contamination degree RD07 of address 07 is in a dirty state as indicated by diagonal lines, but the right window contamination degree RD08 of address 08, which is monitoring the same monitoring area AR08 redundantly, is at a normal level and requires cleaning. It becomes possible to judge at a glance that there is no urgent need.

In this respect, even for the address 15 whose left window pollution degree LD15 has reached the soiled state, the left window pollution degree LD16 of the address 14 which is monitoring the same monitoring area AR15 in duplicate is at a normal level, and similarly, It becomes possible to easily determine that there is no urgent need for cleaning.

The defacement display 120 in FIG. 12 shows an embodiment in which the defacement information 100 is displayed in the order of the addresses of the fire detection devices 16 with the longitudinal direction of the tunnel as the horizontal direction.

The defacement display 130 in FIG. 13 shows an embodiment in which defacement information 100 is displayed in the order of the addresses of the fire detection devices 16 corresponding to the monitoring areas AR1, AR2, . . . in the tunnel.

Note that when displaying the defacement displays 110, 120, and 130 of FIGS. 11 to 13 on a liquid crystal display, if the display does not fit on one screen, a display method such as switching display or scroll display will be used.

(Sixth embodiment of defacement display)
As a sixth embodiment of the defacement display by the defacement display control unit 32 provided in the disaster prevention reception panel 10, the defacement display according to the first to fifth embodiments shown in FIGS. Accordingly, they may be selected and displayed as necessary.

[Modification of the present invention]
(Fire detection device)
Although the above embodiment takes a two-wavelength type fire detection device as an example, the present invention is not limited to this, and other types may be used. For example, in addition to the two wavelengths mentioned above, radiation energy in a wavelength band near 3.8 μm, which is on the shorter wavelength side of the 4.4 to 4.5 μm band that is the resonant radiation band of CO ₂ , is calculated as in the two-wavelength method. It is also possible to use a three-wavelength flame detector that detects the flame using the following method and determines the presence or absence of flame based on the relative ratio of each light reception signal in these three wavelength bands.

(Detection of signs of contamination and contamination conditions)
In the above embodiment, the fire detection device detects the predictive forecast state and the forecast state and transmits them to the disaster prevention receiving board, but the present invention is not limited to this. For example, since the disaster prevention reception board collects and stores the left window pollution degree and right window pollution degree of the fire detection device, the disaster prevention reception board's pollution display control unit can display the left window pollution degree or the right window pollution degree. When a predetermined contamination sign threshold is reached, the left window contamination level or the right window contamination level is made to identify and display the contamination sign state, and when the left window contamination degree or the right window contamination level is higher than the contamination indication threshold. When the stain threshold has been reached, the stain state may be displayed to identify the left window stain degree or the right window stain degree. This makes it possible to reduce the processing load on the fire detector device side.

Note that the left window and the right window may be, for example, a single translucent window curved so as to cover the left side light receiving section and the right side light receiving section. In this case, the part corresponding to the front of the sensor of the left fire detection part (light receiving part) is the left translucent window of this embodiment, and the part corresponding to the front of the sensor of the right fire detection part (light receiving part) is the right translucent window. corresponds to

(Display contents of degree of contamination)
In the above embodiment, the stain display control unit of the disaster prevention receiver displays the left window stain degree and the right window stain degree as an analog value (light attenuation rate) of the stain degree, but the present invention is not limited to this. For example, the degree of contamination may be displayed in multiple stages using characters, symbols, figures, or colors. By displaying the degree of contamination in multiple stages using letters, symbols, figures, or colors, it is possible to intuitively grasp the degree of contamination and determine the necessity of cleaning.

In addition, in each embodiment of the stain display shown in FIGS. 7 to 13, the numerical display of the degree of stain is not essential and may be omitted. Even if numerical display of the degree of contamination is omitted, the object of the present invention can still be achieved in that the urgency and priority of cleaning can be easily and efficiently grasped.

Furthermore, in each of the embodiments of soiling display shown in FIGS. 7 to 13, the degree of soiling or the degree of soiling may be displayed in the order of monitoring areas with the highest degree of cleaning severity.

(Others) Monitoring Area Furthermore, the present invention includes appropriate modifications that do not impair its objects and advantages, and is not limited by the numerical values shown in the above embodiments.

1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention reception boards 12a, 12b: Signal line 16: Fire detection device 16L: Left window fire detection section 16R: Right window fire detection section 18, 34: Control section 20a, 20b, 35: Transmission section 31: Fire monitoring control section 32: Contamination display control section 36L: Left translucent window 36R: Right translucent window 38a, 38b: Light receiving section 40a, 40b: Amplification processing section 42: Test light source section 44: Contamination light receiving section 46: Amplification section 48: Fire determination section 50: Contamination processing section

Claims (1)

A disaster prevention system that monitors the occurrence of fire in the monitoring areas by placing a fire detection device at each boundary of a plurality of continuous monitoring areas,
a display unit that displays information regarding the fire detection device;
a control unit that causes the display unit to display the information;
Equipped with
The fire detection device includes:
comprising a first light-transmitting window and a second light-transmitting window corresponding to each of the monitoring areas adjacent to each other in contact with the boundary of the monitoring area where the fire detection device is arranged;
Determining the presence or absence of a fire outbreak in each of the monitoring areas by receiving light rays from each of the mutually adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window;
a first window contamination degree indicating a state of contamination of the first translucent window corresponding to one of the mutually adjacent monitoring areas; and a second window contamination corresponding to the other of the mutually adjacent monitoring areas. detecting the degree of contamination of the second window indicating the contamination state of the second window;
The control unit includes:
Based on the first window contamination degree and the second window contamination degree detected by the plurality of fire detection devices, the display section displays the same monitors that are respectively arranged at the adjacent boundaries and are monitoring redundantly. The degree of contamination of the first window of one of the first windows and the degree of contamination of the second window of the other fire detection device are aligned so that the degree of contamination of the first window of one of the fire detection devices corresponding to the area and the degree of contamination of the second window of the other of the fire detection devices are aligned. displaying the second window contamination level set in the order of arrangement of the plurality of fire detection devices;
As the first window stain degree and the second window stain degree, when the stain degree does not reach a predetermined stain precursor threshold value, a normal state is identified and displayed, and when the stain degree has reached the stain prediction threshold value, the stain is displayed. 1. A disaster prevention system characterized in that a predictive state is identified and displayed, and the defaced state is identified and displayed when the degree of contamination reaches a predetermined contamination threshold higher than the defacement predictive threshold.

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