JP2020181354A - Tunnel disaster prevention system - Google Patents

Abstract

To provide a tunnel disaster prevention system capable of efficiently and appropriately grasping deterioration and suppressing non-fire alarms as a result by determining reliability of fire sensors while dividing the inside of a tunnel into a plurality of zones in an active state.SOLUTION: A disaster prevention receiving board 10 collects the number of times of occurrence of a failure sign from fire sensors 12 in predetermined timings, generates zone reliability information including the zone average number of times of occurrence of the failure sign obtained by averaging the number of times of occurrence of the failure sign of the fire detectors 12 provided in each zone in a case where the inside of a tunnel is divided into a plurality of zones, and also generates total failure sign information including the total number of times of occurrence of the failure sign as the entire tunnel obtained by averaging the zone average number of times of occurrence of the failure sign of each zone in the plurality of zones. A specific zone which satisfies a predetermined condition in a case where the zone average number of times of occurrence of the failure sign is compared with the total average number of times of occurrence of the failure sign, is determined as reliability reduction and notified.SELECTED DRAWING: Figure 8

Description

The present invention relates to a tunnel disaster prevention system and a fire detector that monitor a fire in a tunnel by a fire detector connected to a signal line drawn from a disaster prevention receiver.

Conventionally, in tunnels such as motorways, fire detectors that monitor fires have been installed to protect people and vehicles from fire accidents that occur in the tunnels, and are connected to signal lines drawn from disaster prevention receivers. I am monitoring the fire.

The fire detector has detection areas in both the left and right directions, and the detection areas with the adjacent fire detectors overlap each other along the longitudinal direction of the tunnel, for example, at intervals of 25 m or 50 m. They are arranged continuously at intervals.

In addition, the fire detector monitors the radiation from the fire flame generated in the tunnel through the translucent window, for example, infrared rays, and in order to check the sensitivity of the light receiving element in order to maintain the flame monitoring function. Sensitivity test and dirt test to monitor dirt on transparent windows are conducted.

However, in such a conventional fire detector, when the operation period becomes long and the fire detector deteriorates, the sensor failure by the sensitivity test and the dirt abnormality by the dirt test are not detected normally. Even in a state where it seems to be in operation, there is a possibility that the fire detector outputs a fire detection signal and a non-fire report is issued from the disaster prevention receiver. In such a case, it is a non-fire report. Until it is confirmed that it is, it is necessary to issue an entry prohibition warning by using an alarm display board facility etc. to prohibit the vehicle from passing through the tunnel, and the person in charge of management must go to the site to check it, and by the time the tunnel passage is resumed. It takes time and effort, and the impact of causing traffic congestion is not small.

For this reason, a tunnel disaster prevention system has been proposed in which the degree of deterioration is determined and notified based on environmental stress such as temperature, humidity, shock vibration, and electrical noise of the fire detector on the disaster prevention receiver. By grasping the progress of deterioration of the detector, it is possible to take measures such as replacing the fire detector with a spare fire detector before a non-fire report is issued.

Further, in the conventional tunnel disaster prevention system, when the disaster prevention receiver receives a fire signal from the fire detector, the fire detector is temporarily restored after a predetermined time in order to prevent a non-fire alarm, and then again for a predetermined time. When a fire signal is received within the time, it is judged as a fire and an entry prohibition warning is issued by the alarm display board equipment.

JP-A-2002-246962 JP-A-2016-1287796 JP-A-2018-169893

By the way, in some conventional tunnel disaster prevention systems, the degree of deterioration is determined based on a test abnormality of a fire detector. In this case, for example, a disturbance source exists at all times or for a predetermined period depending on the location. Disturbance during the test due to conditions such as permanent lighting and vehicle traffic, temporary construction due to construction work in the surrounding area, lighting installation, welding light, dust generation, and traffic of workers. The source may act and cause test abnormalities (for example, ambient light acts on the test light and appropriate test results cannot be obtained). In such cases, the fire detector is not deteriorated. There is a possibility that it will be judged as deterioration. Therefore, it is required to judge the degree of deterioration of the fire detector in consideration of the timing, local and overall environmental factors.

The present invention provides a tunnel disaster prevention system that can efficiently and appropriately detect deterioration by dividing the inside of a tunnel into a plurality of sections in an operating state and judging the reliability of a fire detector, and thus can suppress non-fire alarms. The purpose is to do.

(Tunnel disaster prevention system)
The present invention is a tunnel disaster prevention system in which a tunnel is divided into a plurality of sections and fire detectors are provided in each section.
A section reliability information generator that generates section reliability information including the section average number of failure signs that averages the number of occurrences of a predetermined failure sign of a fire detector provided in the section.
A comprehensive reliability information generator that generates comprehensive failure sign information including the total average number of failure signs that averages the average number of failure signs in each section in multiple sections.
When comparing the average number of occurrences of failure signs and the total average number of occurrences of failure signs, a section reliability judgment unit that determines and notifies a specific section that satisfies a predetermined condition as a decrease in reliability,
Is characterized by being provided.

(Detector reliability judgment)
The tunnel disaster prevention system is further
A fire detector reliability judgment unit is provided to notify a fire detector whose failure sign occurrence number is equal to or more than a predetermined value or exceeds a predetermined value with respect to the section average number of failure signs as a decrease in reliability. ..

(What to do if the reliability of the fire detector is not judged to be reduced in the section of reduced reliability)
The section reliability judgment unit prescribes that if the fire detector reliability judgment unit does not determine a decrease in the reliability of the fire detector, there is a factor that impedes the reliability of the section in which the decrease in reliability is determined. Notify the countermeasures of.

(What to do if it is judged that the reliability of the fire detector has decreased)
When the fire detector reliability judgment unit determines that the reliability of the fire detector has deteriorated, it is determined that there is a factor that impedes the reliability of the surrounding environment of the fire detector and that the fire detector is replaced. Notify the action.

(Fire treatment when it is judged that the reliability of the fire detector is reduced 1)
When the fire detector reliability judgment unit determines that the reliability of the fire detector has deteriorated, the fire detector reliability determination unit sets the predetermined first fire judgment accumulation condition of the fire detector to a stricter predetermined first fire judgment accumulation condition than the first fire judgment accumulation condition. A fire signal is sent from at least one of the fire detector that changed the fire judgment accumulation condition of 2 and restored, and the adjacent fire detector that duplicately monitors the detection area of the fire detector. When it is received, the prescribed fire treatment is performed.

(Fire treatment when it is judged that the reliability of the fire detector is reduced 2)
When the fire detector reliability judgment unit judges that the reliability of the fire detector has deteriorated, at least one fire judgment of the fire detector and the adjacent fire detector that duplicately monitors the detection area of the fire detector. The accumulation condition is changed to a predetermined third fire judgment condition accumulation condition in which the first fire judgment accumulation condition is relaxed.

(Judgment of failure deterioration 1)
The fire detector judges a fire by a plurality of fire judgment stages, and fails when a fire is not judged and a fire is not judged in at least one of the multiple fire judgment stages. It is judged as a sign and the number of occurrences of the failure sign is calculated.

(Judgment of failure deterioration 2)
The fire detector conducts a test to judge the failure of the fire detection unit based on the received signal when the test light source is driven, and the level of the received signal by the test is out of the predetermined normal range, but the predetermined failure is judged. When the condition is not satisfied, it is determined as a failure sign and the number of occurrences of the failure sign is calculated.

(Judgment of failure deterioration 3)
Fire detector
A fire is judged by a plurality of fire judgment stages, and if a fire is not judged and a fire is not judged in at least one of the fire judgment stages, it is regarded as a first failure sign. Along with the determination, the number of occurrences of the first failure sign is obtained, and
We are conducting a test to judge the failure of the fire detection unit based on the received signal when driving the test light source, and the level of the received signal in the test is out of the specified normal range but does not satisfy the specified failure judgment condition. In that case, it is determined that it is a second failure sign, and the number of occurrences of the second failure sign is calculated.
The section reliability information positive part is the section average occurrence of the failure sign, which is the average of either or both of the number of occurrences of the first failure sign and the number of occurrences of the second failure sign of the fire detector provided in the section. Generate interval reliability information including the number of times.

(Basic effect)
In the present invention, in a tunnel disaster prevention system in which a tunnel is divided into a plurality of sections and fire detectors are provided in each section, the number of occurrences of a predetermined failure sign of the fire detectors provided in the sections is averaged. Includes the section reliability information generator that generates section reliability information including the average number of occurrences of failure signs, and the total average number of occurrences of failure signs that averages the average number of occurrences of failure signs in each section in multiple sections. The reliability of a specific section that satisfies a predetermined condition when comparing the total average number of occurrences of a failure sign and the total average number of occurrences of a failure sign with the comprehensive reliability information generation unit that generates comprehensive failure sign information is reduced. Since a section reliability judgment unit is provided to determine and notify, the average number of occurrences of failure signs in each section is the total average of failure signs for the entire tunnel, based on the number of occurrences of failure signs in the fire detector. By comparing with the number of occurrences, if the average number of occurrences of the failure sign in the section exceeds the predetermined value with respect to the total average number of occurrences of the failure sign, the section is judged to be unreliable and notified, and the fire detector is notified. It is necessary for the operation manager to focus on inspecting the fire detectors installed in the section where the reliability is judged to be deteriorated by knowing the section where the reliability has deteriorated due to the deterioration of the fire. If there is, the fire detector will be replaced with a new one, and appropriate measures will be taken for the fire detector in the section where there is a high possibility that a fire signal will be issued as a non-fire report due to deterioration etc. It is possible to prevent the passage of tunnels from being stopped due to fire treatment accompanied by an entry prohibition warning.

In addition, for the section judged to have reduced reliability, for example, environmental factors such as temperature, humidity, dust, electrical noise, and ambient light, which are factors that cause deterioration of the fire detector, are investigated, and the cause of the deterioration of reliability is reduced. It is possible to take measures such as suppressing or eliminating such environmental factors.

(Effect of detector reliability judgment)
In addition, the tunnel disaster prevention system further determines that the reliability of the fire detector is lower than the predetermined value or exceeds the predetermined value with respect to the average number of occurrences of the failure sign in the section, and notifies the fire. Since the detector reliability judgment unit is provided, by identifying the fire detector that is judged to be unreliable among the multiple fire detectors installed in the section that is judged to be unreliable, the fire detector can be identified. Focus on inspecting fire detectors, replace fire detectors with new ones if necessary, and investigate environmental factors at the installation site to control or eliminate environmental factors that reduce reliability. You can take measures such as

(Effect of measures when the reliability of the fire detector is not judged in the section of reliability deterioration)
In addition, the section reliability judgment unit indicates that if the fire detector reliability judgment unit does not determine a decrease in the reliability of the fire detector, there is a factor that impedes the reliability of the section in which the decrease in reliability is determined. Therefore, even if it is judged that the reliability of the section is reduced, if the reliability of the specific fire detector installed in the section is not judged to be reduced, it is installed in the section. The number of occurrences of failure deterioration of the fire detector is increasing overall, and it is assumed that the number of occurrences of failure signs due to environmental factors in the section is higher than in other sections. Therefore, environmental factors such as temperature, humidity, dust, electrical noise, and ambient light that cause deterioration of the fire detector are investigated, and environmental factors that cause deterioration of reliability due to deterioration etc. are suppressed or removed. By notifying the countermeasures, it is possible to remove or suppress environmental factors that impair reliability and reduce the number of failures and deteriorations.

(Effect of Action 1 when it is judged that the reliability of the fire detector is reduced)
In addition, when the fire detector reliability judgment unit determines that the reliability of the fire detector has deteriorated, it includes the fact that there is a factor that hinders the reliability of the surrounding environment of the fire detector and the replacement of the fire detector. Since the prescribed countermeasures are notified, one or more fire detectors judged to be unreliable can be identified from among the plurality of fire detectors installed in the section judged to be unreliable. The operation manager can suppress further deterioration of reliability by focusing on inspection of fire detectors that are judged to have decreased reliability and replacing the fire detectors with new ones if necessary. , The reliability can be restored.

(Effect of Fire Judgment 1 when it is judged that the reliability of the fire detector is reduced)
Further, when the fire detector reliability judgment unit judges that the reliability of the fire detector is lowered, the predetermined first fire judgment accumulation condition of the fire detector is set to be stricter than the first fire judgment accumulation condition. The fire was restored by changing to the second fire judgment storage condition, and the fire detector that changed the fire judgment storage condition and the adjacent fire detector that duplicately monitors the detection area of the fire detector fired. When a signal is received, the prescribed fire treatment is performed, so even if it is considered as a non-fire report by judging that the reliability is low, the first fire judgment of the fire detector that became a non-fire report Adjacent fire detection that duplicately monitors the same warning area as the fire detector that changed the fire judgment storage condition by changing the storage condition to the strict second fire judgment storage condition to make it difficult to issue non-fire reports and recovering. When a fire signal is received from at least one of the vessels, it is definitely judged as a fire and fire processing including a tunnel entry prohibition warning is performed, so that the fire can be reliably detected and dealt with.

(Effect of Fire Judgment 2 when it is judged that the reliability of the fire detector is reduced)
In addition, when the fire detector reliability judgment unit determines that the reliability of the fire detector has deteriorated, at least one of the fire detector and the adjacent fire detector that duplicately monitors the detection area of the fire detector. When the fire judgment storage condition is changed to the predetermined third fire judgment condition storage condition that relaxes the first fire judgment storage condition, a fire signal is issued and the fire detector is judged to have reduced reliability. , If it is a fire signal due to an actual fire, the adjacent fire detector will be changed to high sensitivity due to the relaxation of the fire judgment accumulation conditions, and the fire signal will be transmitted promptly, and the first fire signal will be transmitted for reliability. The fire can be dealt with by waiting for the reception of the fire signal after the restoration of the fire detector judged to be deteriorated.

(Effect of judgment 1 of failure deterioration)
In addition, the fire detector judges a fire by a plurality of fire judgment stages, and a fire is judged in at least one of the multiple fire judgment stages, but a fire is judged in the remaining fire judgment stages. If the fire is not detected, it is judged as a failure sign and the number of occurrences of the failure sign is calculated. Therefore, the fire detector issues a fire signal based on the fire judgment through multiple fire judgment stages due to a failure or non-fire factor. In order to output, there have been several failure signs that could not be judged as a fire in the middle of multiple fire judgment stages, and the reliability is judged by calculating the number of occurrences of these failure signs. Even if the fire detector determines that there is a fire, if the number of occurrences of failure signs is high, there is a high possibility of a non-fire report, so it is judged that the reliability has deteriorated and it is not. It is possible to reliably prevent fire treatment by fire information.

(Effect of judgment 2 of failure deterioration)
In addition, the fire detector is conducting a test to determine the failure of the fire detection unit based on the received signal when the test light source is driven, and the level of the received signal in the test is out of the predetermined normal range, but it is predetermined. When the failure judgment condition is not satisfied, it is judged as a failure sign and the number of occurrences of the failure sign is calculated. Therefore, for example, the sensor unit and the amplification processing unit are based on the received signal when the fire detector drives the test light source. In order to determine the failure of the fire detection unit equipped with, for example, the level of the light receiving signal is out of the normal range due to deterioration of the light receiving element, but the failure judgment condition is determined without reaching the failure threshold, for example. Unsatisfied failure signs have occurred several times, and by using the number of failure signs in the fire detector test as the basis for determining reliability, the fire detector can detect a failure in the fire detector. Even if it is not judged, if the number of occurrences of failure signs is large, there is a high possibility of non-fire alarm, so it is judged that the reliability is low, and it is possible to reliably prevent fire treatment by non-fire alarm. ..

(Effect of judgment 3 of failure deterioration)
In addition, the fire detector judges a fire by a plurality of fire judgment stages, and when the fire is not judged in at least one of the plurality of fire judgment stages and the fire is not judged as a fire. In addition to determining the first failure sign, the number of occurrences of the first failure sign is determined, and a test is conducted to determine the failure of the fire detection unit based on the received signal when the test light source is driven. When the level of the received signal due to is out of the predetermined normal range but does not satisfy the predetermined failure judgment condition, it is determined as a second failure sign, and the number of occurrences of the second failure sign is obtained, and the section reliability is obtained. The sexual information positive part calculates the average number of occurrences of the first failure sign and the number of occurrences of the second failure sign of the fire detector provided in the section, or the average number of occurrences of the failure sign in the section. Since the section reliability information including the section is generated, the effect of the above-mentioned failure deterioration determination 1 and the effect of the failure deterioration determination 2 can be combined.

Explanatory diagram showing the outline of the tunnel disaster prevention system Explanatory drawing showing the section and detection area of the fire detector Explanatory drawing showing the appearance of the fire detector Block diagram showing the outline of the functional configuration of the fire detector Flow chart showing the control operation of the fire detector Explanatory drawing showing the peak level of the received signal and the number of occurrences of failure signs when the internal test light source is driven by the sensitivity test of the fire detector. Flowchart showing sensitivity test of fire detector with judgment of failure sign Block diagram showing the outline of the functional configuration of the disaster prevention receiver Flowchart showing reliability judgment control by disaster prevention receiver

[Tunnel disaster prevention system]
[Basic concept of the embodiment]
FIG. 1 is an explanatory diagram showing an outline of a tunnel disaster prevention system. The basic concept of the tunnel disaster prevention system according to the present embodiment is that the fire detector 12 is connected to the signal lines 14a and 14b wired from the disaster prevention receiver 10 for each signal system in the tunnel, and the fire detector 12 is connected. Holds failure sign information indicating the number of occurrences of a predetermined failure sign due to deterioration or the like, and the disaster prevention receiver 10 acquires failure sign information from the fire detector 12 at a predetermined reliability determination control timing. , The number of occurrences of failure signs is extracted and collected, and the average number of occurrences of failure signs is included, which is the average number of occurrences of predetermined failure signs of the fire detectors provided in each section when the tunnel is divided into multiple sections. The section reliability information is generated, and in addition, the total failure sign information including the total average number of failure signs of the entire tunnel, which is the average number of failure signs of each section in multiple sections, is generated to generate the failure. When the average number of occurrences of the sign section and the total average number of occurrences of the failure sign are compared, a specific section satisfying a predetermined condition is determined to be a reliability deterioration section and notified.

Therefore, the average number of occurrences of failure signs for the fire detector 12 provided in the section exceeds a predetermined value with respect to the total average number of occurrences of failure signs for the fire detector 12 of the entire tunnel. If there are many, the section is judged to be unreliable and notified, and the section in the tunnel where the fire detector 12 has deteriorated and the reliability has deteriorated is identified, so that the operation manager can trust the section. By focusing on inspecting the fire detector 12 installed in the section judged to be deteriorated and replacing the fire detector 12 with a new one if necessary, deterioration etc. progresses and an erroneous fire signal ( Take appropriate measures for the fire detector 12 in the section that is likely to output a non-fire fire signal), and stop the passage of the tunnel by fire treatment accompanied by a tunnel entry prohibition warning by a non-fire report. It can be prevented in advance.

Further, regarding the fire detector 12 in the section where the reliability is determined to be deteriorated, for example, environmental factors such as temperature, humidity, dust, electrical noise, and ambient light, which are factors of deterioration of the fire detector 12, are investigated, and due to deterioration or the like. It is possible to repair or replace a fire detector that is expected to fail, or to suppress or eliminate environmental factors in the section that cause a decrease in reliability. Specifically, for example, it is conceivable to remove or relocate the disturbance light source, adjust the ventilation flow to adjust the temperature and humidity, and regulate the passage of workers and the like involved in construction work and peripheral equipment inspection.

Further, the disaster prevention receiver 10 determines that the fire detector 12 in which the number of occurrences of the failure sign is equal to or greater than the predetermined value or exceeds the predetermined value with respect to the average number of occurrences of the failure sign in the section is determined as the reliability deterioration detector. The fire is detected by identifying the fire detector 12 that is determined to be unreliable among the plurality of fire detectors 12 that are installed in the section that is determined to be unreliable. Focus on inspecting the vessel 12, repairing or replacing the fire detector if necessary, and investigating the environmental factors at the installation site to suppress or eliminate the environmental factors that reduce reliability. It is possible to take measures such as.

The failure sign in the present embodiment means a state in which a failure that should occur in the future is predicted, and can also be said to be a failure sign, a failure precursor, a failure precursor, or the like.

Further, in the example of FIG. 1, the signal system and the tunnel have a one-to-one correspondence, but for example, a plurality of signal systems can be provided in one tunnel. Alternatively, a plurality of tunnels can be combined into one signal system, and the relationship between the signal system and the tunnel is arbitrary.

[Overview of 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. Inside the up line tunnel 1a and the down line tunnel 1b, fire detectors 12 are installed at intervals of, for example, 25 meters or 50 meters along the wall surface in the longitudinal direction of the tunnel. The present invention can also be applied to a disaster prevention system in a tunnel other than a motorway.

In the present embodiment, as shown in FIG. 2A, for example, the up line tunnel 1a is divided into a plurality of sections A1 to An, and in this example, three fire detectors 12 are included in one section. It has been. It should be noted that the division of the sections A1 to An is arbitrary, and it is sufficient that at least one fire detector 12 is included, and the lengths of the sections A1 to An may be the same or different. Is fine. The same applies to the number of fire detectors 12 installed in each section.

The fire detector 12 includes two sets of fire detection units, a right eye and a left eye, and as shown in FIG. 2, has detection areas 15 in both the ascending side and the descending side in the longitudinal direction of the tunnel, and the longitudinal direction of the tunnel. A fire detector 12 and a detection area 15 arranged adjacent to each other are continuously arranged so as to complement each other in, for example, the right eye 13R and the left eye 13L, and a fire occurs in the detection area 15. The fire is monitored and detected by observing the infrared rays from the flame.

In addition, the up line tunnel 1a and the down line tunnel 1b are provided with a manual notification device and an emergency telephone for fire notification as emergency facilities, and a fire hydrant device for extinguishing a fire and preventing the spread of fire. Water spraying equipment that sprinkles fire extinguishing water from the water spray head is installed to protect the tunnel frame and the inside of the duct from fire, but the illustration is omitted.

From the disaster prevention receiver panel 10, power supply signal lines and signal lines 14a and 14b are pulled out from the up line tunnel 1a and the down line tunnel 1b, and a plurality of fire detectors 12 are connected to each of them, and the fire detector 12 is connected to the fire detector 12. A unique address is set. In the following description, the signal lines 14a and 14b may be referred to as signal lines 14 when it is not necessary to distinguish them.

For the disaster prevention receiver 10, the fire extinguishing pump equipment 16, the cooling pump equipment 18 for ducts, the IG slave station equipment 20, the ventilation equipment 22, the alarm display board equipment 24, the radio rebroadcasting equipment 26, and the television monitoring equipment 28 The fire detector 12 and the disaster prevention receiver 10 communicate with each other via the signal line 14 in a so-called R-type transmission system.

Here, the IG slave station equipment 20 is a communication equipment that connects the disaster prevention receiving panel 10 and the remote monitoring and control equipment 32, which is a higher-level equipment provided outside, via a network.

The ventilation equipment 22 is equipment that generates a ventilation flow in the longitudinal direction of the tunnel by operating a jet fan installed on the ceiling side in the tunnel.

The alarm display board equipment 24 is equipment that displays information such as an entry prohibition warning due to a fire on an electric display board to notify the user. The radio rebroadcasting facility 26 is a facility for allowing a driver or the like to receive information from a road administrator in a tunnel. The TV monitoring facility 28 is a device for confirming the scale and position of a fire, operating a water spray facility, and grasping the situation in a tunnel when evacuation guidance is performed. The lighting equipment 30 is equipment that drives and manages the lighting equipment in the tunnel.

[Fire detector]
(Appearance of fire detector)
FIG. 3 is an explanatory diagram showing the appearance of the fire detector, and FIG. 4 is a block diagram showing an outline of the functional configuration of the fire detector.

As shown in FIG. 3, in the fire detector 12, two sets of translucent windows 50R and 50L are provided on the left and right in the sensor storage portion 46 provided in the upper part of the housing 44, and the translucent windows 50R are provided. , A sensor unit is built in corresponding to each of 50L. Further, two sets of translucent windows for test light sources 52R in which an external test light source used for a stain test of the translucent windows 50R and 50L are housed in a position near the translucent windows 50R and 50L where the sensor unit can be seen. , 52L is provided.

In the following description, the translucent window 50R may be referred to as a right-eye translucent window 50R, and the translucent window 50L may be referred to as a left-eye translucent window 50L.

(Outline configuration of fire detector)
As shown in FIG. 4, the fire detector 12 includes a detector control unit 54, a transmission unit 56, a power supply unit 58, two sets of left and right fire detection units 60R and 60L, a test light emission drive unit 76, and a sensitivity test. Internal test light sources 78R, 80R, 82R, internal test light sources 78L, 80L, 82L, and external test light sources 84R, 84L used for a stain test are provided. In the following description, the fire detection unit 60R may be referred to as a right eye fire detection unit 60R, and the fire detection unit 60L may be referred to as a left eye fire detection unit 60L.

The detector control unit 54 is, for example, a function realized by executing a program, and as hardware, a computer circuit having a CPU, a memory, various input / output ports, and the like is used.

The transmission unit 56 is connected to the disaster prevention receiving panel 10 shown in FIG. 1 by the transmission line S of the signal line 14 and the transmission common line SC, and various signals are transmitted and received by R-type transmission.

The power supply unit 58 receives power from the disaster prevention receiving panel 10 shown in FIG. 1 by the power supply line B and the power supply common line BC included in the signal line 14, for example, the detector control unit 54, the transmission unit 56, and two sets of fires on the left and right. A predetermined power supply voltage is supplied to the detection units 60R and 60L and the test light emission drive unit 76.

Internal test light sources 78R, 80R, 82R78L, 80L, 82L used for the sensitivity test are connected to the test light emitting drive unit 76, and external test light sources 84R, 84L used for the dirt test are connected to each of them as light emitting elements. A krypton lamp is provided.

(Fire detection unit)
The fire detection units 60R and 60L include sensor units 64, 68 and 72 and amplification processing units 66, 70 and 74. For example, taking the right eye fire detection unit 60R as an example, the right eye translucent window 50R provided in the sensor storage unit 46 is arranged in front of the sensor units 64, 68, 72, and the right eye translucent window. Infrared energy from the external detection area is incident on the sensor units 64, 68, 72 via the 50R.

The right eye fire detection unit 60R monitors a fire by, for example, a three-wavelength flame detection. The sensor unit 64 selectively transmits infrared rays in the 4.5 μm band, which is the resonance radiation band of CO ₂ peculiar to flames, from the infrared energy incident through the right eye translucent window 50R by an optical wavelength band path filter. After (passing), the infrared ray is received by the light receiving sensor and photoelectrically converted, and then a predetermined process such as amplification is performed by the amplification processing unit 66 to generate a flame light receiving signal E1R corresponding to the amount of light receiving energy. Output to.

The sensor unit 68 selectively transmits infrared energy in the first non-flame wavelength band, for example, 5.0 μm band, from the infrared energy incident through the right eye translucent window 50R by an optical wavelength band path filter. After (passing), the light is received by the light receiving sensor, photoelectric conversion is performed, and then a predetermined process such as amplification is performed by the amplification processing unit 70, and the detector control unit is used as the first non-flame light receiving signal E2R corresponding to the amount of light receiving energy. Output to 54.

The sensor unit 72 selectively transmits infrared energy of, for example, 2.3 μm, which is the second non-flame wavelength band, from the infrared energy incident through the right eye translucent window 50R by an optical wavelength band path filter. The detector control unit 54 serves as a second non-flame light receiving signal E3R corresponding to the amount of light received energy by performing predetermined processing such as amplification by the amplification processing unit 74 after receiving the light by the light receiving sensor and performing photoelectric conversion. Output to.

The amplification processing units 66, 70, 74 are provided with a preamplifier, a frequency filter that selectively passes a predetermined frequency band including the fluctuation frequency of the flame, a main amplifier, and the like.

(Fire judgment)
The detector control unit 54 is provided with the function of the fire determination unit 86 as a function realized by executing the program. The fire determination unit 86 determines a fire in a plurality of fire determination stages based on the flame light receiving signal E1R, the first non-flame light receiving signal E2R, and the second non-flame light receiving signal E3R. The fire determination unit 86 makes the following three stages of fire determination, for example.

When the flame light receiving signal E1 exceeds or exceeds a predetermined threshold value, the fire determination unit 86 calculates the relative ratio (E1R / E2R) with the first non-flame light receiving signal E2, and calculates the relative ratio (E1R / E2R). When exceeds a predetermined threshold value, it is determined that a fire (fire candidate) is satisfied, assuming that the fire determination condition of the first stage is satisfied, and the next second stage fire determination is performed.

In the second stage fire determination by the fire determination unit 86, the relative ratio (E1R / E3R) of the flame light receiving signal E1R to the second non-flame light receiving signal E3R is calculated, and the relative ratio (E1R / E3R) is predetermined. When the threshold value is exceeded, it is determined that the fire is satisfied as the fire determination condition of the second stage is satisfied.

Subsequently, the fire determination unit 86 performs the next third stage fire determination. The fire judgment condition of the third stage by the fire judgment unit 86 is that the flame light receiving signal E1R is fast Fourier transformed (FFT) and the result is analyzed. For example, the relative intensity of the low frequency side component of 4 Hz or less and the high frequency of more than 4 Hz and 8 Hz or less. The relative ratio of the relative strengths of the side components is calculated, and when this relativization exceeds or exceeds a predetermined threshold value, it is determined that the fire judgment condition of the third stage is satisfied, and thereby the first to first fires are determined. It means that it was judged as a fire in all of the fire judgment stages of 3, and it is judged as a fire as a whole.

Further, when the fire judgment conditions of the first to third stages are continuously satisfied a predetermined number of times, the fire is determined as satisfying the predetermined fire judgment accumulation conditions, and the fire signal is transmitted to the disaster prevention receiving panel 10. I do. The same applies to the left eye fire detection unit 60L.

The fire judgment by the fire judgment unit 86 by the plurality of fire judgment stages is not limited to the above fire judgment, and one or a plurality of fire judgment stages may be added, for example, any one of the above three stages. May be omitted and two steps may be taken. Alternatively, for example, there may be four stages including the accumulation determination stage.

(Judgment of failure sign)
The fire judgment unit 86 determines that a failure sign has occurred when the fire is not judged and the fire is not judged in the middle of the above-mentioned three-step fire judgment stage, and the number of occurrences N of the failure sign is determined by the counter. Control to count.

Further, the fire determination unit 86 determines (determines) a failure sign when the number of occurrences of failure signs N satisfies a predetermined failure sign determination accumulation condition, for example, when the number of occurrences of failure signs N reaches a predetermined threshold value Nth. ), A failure sign signal is transmitted to the disaster prevention receiver 10, and then a predetermined failure sign process is performed. The fire determination unit 86 may further perform a predetermined failure sign processing when the number of times the failure sign is confirmed reaches a predetermined number.

The predetermined failure sign processing by the fire judgment unit 86 is, for example, a process of stopping the transmission of a fire signal, a process of increasing the threshold value of the number of times the fire judgment is accumulated, and a process of tightening the fire judgment accumulation condition. In the failure sign processing that stops the transmission of the fire signal, even if the fire is judged after the failure sign is judged, there is a high possibility that the fire is judged incorrectly due to the failure. Therefore, the transmission of the fire signal is stopped and the fire is not fired. It is to suppress the generation of information. It is also possible not to perform the process of stopping the transmission of the fire signal.

Further, when the fire determination unit 86 receives the internal state request command signal from the disaster prevention receiving panel 10, it controls to generate and transmit the failure sign information indicating the number of occurrences N of the failure sign obtained at that time. The disaster prevention receiver 10 is used to evaluate the reliability of the fire detector 12 based on the number of occurrences N of the failure sign extracted from the acquired failure sign information, and to determine whether the fire detector 12 has reliability or a decrease in reliability. It should be noted that the reliability deterioration may be divided into a plurality of stages according to the degree thereof, and for example, the reliability reduction state and the unreliability state may be distinguished.

The number of occurrences of failure signs N counted by the counter is reset every predetermined period, or is reset when a predetermined period has elapsed after counting the failure signs. However, the number of occurrences N of failure signs before reset may be stored as failure sign information.

(Sensitivity test)
The detector control unit 54 is provided with the function of the sensitivity test unit 88 as a function realized by executing the program. The sensitivity test unit 88 operates when it receives a test instruction signal with its own address specified from the disaster prevention receiver 10 via the transmission unit 56, and instructs the test light emission drive unit 76 to instruct the internal test light sources 78R and 80R. , 82R, 78L, 80L, 82L are driven to emit light in order to perform a sensitivity test of the fire detection units 60R, 60L. The internal test light sources 78R, 80R, 82R and the internal test light sources 78L, 80L, 82L may be shared by one light source, respectively.

For example, taking the circuit system of the sensor unit 64 and the amplification processing unit 66 in the right eye fire detection unit 60R as an example, the test light emission driving unit 76 emits light by driving the internal test light source 78R to emit a simulated flame light corresponding to a fire flame. (Infrared light simulating a flame) is incident on the sensor unit 64.

For the circuit blocks of the sensor unit 64 and the amplification processing unit 66, the reference light receiving value at the time of the initial sensitivity test at the time of shipment from the factory is stored in the memory, and the detected light receiving value obtained at the sensitivity test at the time of system startup is the reference light receiving value. The values are substantially the same, and the detection sensitivity coefficient obtained by dividing the detected light receiving value by the reference light receiving value is 1. As the operation period elapses, the detected light receiving value gradually decreases, and the detection sensitivity coefficient decreases to 0.9, 0.8, 0.7, and so on.

When the detection sensitivity coefficient is reduced to 1 or less in this way, the sensitivity test unit 88 obtains a correction coefficient that is the reciprocal of the detection sensitivity coefficient and stores it in the memory, and stores the correction coefficient in the light receiving value detected in the subsequent operating state. The sensitivity is corrected by multiplication, and the fire determination unit 86 determines the fire based on the sensitivity-corrected light receiving value.

Further, the sensitivity test unit 88 is preset with a sensitivity correction limit threshold value corresponding to a correction coefficient that is the limit of the sensitivity correction, for example, a sensitivity correction limit threshold value of 0.5, and the sensitivity coefficient obtained in the sensitivity test is the sensitivity. When it is below the correction limit threshold value or below the sensitivity correction limit threshold value, it is determined that the sensitivity of the sensor unit 64 is abnormal, and the transmission unit 56 is instructed to set information indicating the sensitivity abnormality in the response signal to the ringing signal matching the self-address. Then, control is performed so that the sensitivity abnormality signal is transmitted to the disaster prevention receiving panel 10.

Further, in the sensitivity test unit 88, for example, a sign threshold of 0.6 for sensitivity abnormality is set in advance corresponding to a sensitivity coefficient indicating a sign of sensitivity abnormality before reaching the sensitivity correction limit, and is obtained by a sensitivity test. When the detected sensitivity coefficient is below or below the sign threshold of sensitivity abnormality, it is determined that it is a sign of a sensitivity abnormality state that is likely to be unable to correct the sensitivity in the near future, and the transmission unit 56 is instructed to perform the sensitivity abnormality. Control is performed to transmit a sensitivity abnormality sign signal indicating a sign of the above to the disaster prevention receiving panel 10 to notify the user.

When the sensitivity test unit 88 determines a sign of a sensitivity abnormality, it is regarded as one of the failure signs, and the counter of the fire judgment unit 86 performs a counting operation to increase the number of occurrences of the failure sign N. You can do it.

Also, if the detection sensitivity increases to 1.1, 1.2, 1.3 ... With the passage of the operation period, it is corrected in the same way, and when the limit is reached, it becomes abnormal.

The sensitivity test is similarly performed on the circuit systems of the sensor unit 68 and the amplification processing unit 70 and the sensor unit 72 and the amplification processing unit 74. Further, the sensitivity test of the left eye fire detection unit 60L is also performed in the same manner by driving the internal test light sources 78L, 80L, 82L by the test light emission driving unit 76.

(Dirt test)
The detector control unit 54 is provided with the function of the dirt test unit 90 as a function realized by executing the program. Similar to the sensitivity test, the dirt test unit 90 operates when a test instruction signal specifying its own address is received from the disaster prevention receiving panel 10 via the transmission unit 56, and instructs the test light emission driving unit 76. The external test light sources 84R and 84L are sequentially driven to emit light to perform a stain test on the translucent windows 50R and 50L.

For example, taking a stain test of the translucent window 50R as an example, the test light emitting drive unit 76 emits and drives an external test light source 84R to emit a flame pseudo light corresponding to a flame, and the translucent window 52R for the test light source. And the light is incident on the sensor unit 64 through the translucent window 50R. The translucent window 52R and the translucent window 50R for the test light source are not contaminated at the time of shipment from the factory, and the light receiving value obtained in the fouling test at that time is stored in the memory as a reference light receiving value, and the dimming rate is calculated. Used for.

The detected light receiving value obtained in the dirt test at the time of system startup is substantially the same as the reference light receiving value, and the dimming rate obtained by subtracting the detected light receiving value from the reference light receiving value and dividing by the reference light receiving value is 0. There is. As the operation period elapses, dirt adheres to the translucent window 50R, and the dimming rate gradually increases as 0.1, 0.2, 0.3, and so on.

When the dimming rate increases in this way, the dirt test unit 90 obtains the dimming rate by the dirt test, finds the correction value which is the reciprocal of (1-dimming rate), stores it in the memory, and then operates it. The light receiving value detected in the state (the light receiving value corrected by the correction value of the sensitivity test) is divided by the correction value to correct the dirt, and the fire determination unit 86 judges the fire by the light receiving value corrected by the dirt.

Further, the stain test unit 90 is preset with a stain threshold value, for example, a stain threshold value of 0.5, which is a dimming rate corresponding to the limit of stain correction, and the dimming rate obtained in the sensitivity test is equal to or higher than the stain threshold value. Alternatively, it is determined that the fouling abnormality makes it impossible to correct the fouling of the translucent window 50R when the fouling threshold is exceeded, and the transmission unit 56 is instructed to add the fouling abnormality information to the response signal to the call signal matching the self-address. It is set and controlled to transmit a pollution signal to the disaster prevention receiving panel 10 to notify the user.

Further, the dirt test unit 90 is preset with a dirt sign threshold value, for example, a dirt sign threshold value of 0.6, which is a dimming rate corresponding to a sign stage at which the dirt correction reaches the limit, and the reduction required in the dirt test. When the light rate is equal to or higher than the dirt sign threshold value or exceeds the dirt sign threshold value, it is determined that the dirt correction of the translucent window 50R is likely to be impossible in the near future, and the transmission unit 56 is instructed. The pollution sign signal is transmitted to the disaster prevention receiving panel 10 to notify the user.

When the stain test unit 90 determines a stain sign, it is regarded as one of the failure signs, and the counter of the fire determination unit 86 performs a counting operation to increase the number of occurrences of the failure sign N. Is also good.

(Control operation of fire detector)
FIG. 5 is a flowchart showing the control operation of the fire detector, which is the control operation by the fire determination unit 86 shown in FIG.

As shown in FIG. 5, the fire determination unit 86 takes the fire detection unit 60R of FIG. 4 as an example, and the flame light receiving signals E1R, first, output from the amplification processing units 66, 70, 74 in step S1. The non-flame receiving signal E2R and the second non-flame receiving signal E3R are taken in by AD conversion, and if the flame receiving signal E1R is equal to or more than a predetermined value in step S2, the process proceeds to step S3, and the flame receiving signal E1R and the first non-flame are received. The ratio of the received light signal E2R (E1R / E2R) is calculated, and if it is equal to or more than a predetermined value, the process proceeds to step S4 assuming that the fire determination condition of the first stage is satisfied, and in step S4, the flame received signal E1R and the second non-flame received light are received. The ratio of the signal E3R (E1R / E3R) is calculated, and if it is equal to or more than a predetermined value, it is assumed that the fire determination condition of the second stage is satisfied, and the process proceeds to step S5.

Subsequently, the fire determination unit 86 performs a fast Fourier transform (FFT calculation) of the flame light receiving signal E1R in step S5, and in step S6, for example, the relative intensity ratio of the components on the low frequency side of 4 Hz or less and the high frequency side of 4 Hz or more and 8 Hz or less. If is equal to or greater than a predetermined value, the process proceeds to step S7 assuming that the third fire determination condition is satisfied, and the fire determination conditions of the first to third stages according to steps S1 to S6 are continuously satisfied by a predetermined accumulation number threshold. Judge whether or not.

Subsequently, when the fire judgment unit 86 satisfies the accumulation number threshold value as the predetermined fire judgment accumulation condition in step S7, the fire determination unit 86 proceeds to step S8 to determine that the fire has occurred, transmits a fire signal to the disaster prevention receiving panel 10, and performs fire processing. Let me do it. Subsequently, when the reception of the fire recovery signal (recovery instruction signal) from the disaster prevention receiving panel 10 is determined in step S9, the fire detection is restored to the initial state in step S10 and the process returns to step S1.

On the other hand, when the fire determination condition of the first stage is not satisfied in step S3, the fire determination unit 86 determines that a failure sign has occurred, and proceeds to step S11 to count the number of occurrences of the failure sign. Is +1 (incremented), and if the number of occurrences of failure signs N is less than the predetermined threshold number Nth in step S12, the process from step S1 is repeated.

Further, the fire determination unit 86 proceeds to step S11 to generate a failure sign when the fire determination condition of the first stage of step S3 is satisfied but the fire determination condition of the second stage of step S4 is not satisfied. When the counter N for counting the number of times is set to +1 and the number of occurrences of failure signs N is less than the predetermined threshold number Nth in step S12, the process from step S1 is repeated.

Further, the fire determination unit 86 satisfies the fire determination conditions of the first stage of step S3 and the second stage of step S4, but does not satisfy the fire determination conditions of the third stage of step S6, step S11. The counter N for counting the number of occurrences of the failure sign is set to +1. If the number of occurrences of the failure sign N is less than the predetermined threshold number Nth in step S12, the process from step S1 is repeated.

By repeating the counting of the number of occurrences of the failure sign, the fire determination unit 86 satisfies the failure sign determination accumulation condition in which the failure sign occurrence number N becomes the predetermined threshold number Nth or more in step S12. Is determined (confirmed), the process proceeds to step S13, a failure sign signal is transmitted to the disaster prevention receiver 10 to notify the user, and then a predetermined failure sign process is performed in step S14.

In step S13, even if the failure sign determination accumulation condition of step S12 is further satisfied with the failure sign determination accumulation condition of whether or not the number of failure sign determinations in step S12 reaches a predetermined threshold value. good.

Further, in the failure sign processing, for example, the accumulation number threshold value in step S7 is increased to make the fire judgment accumulation condition strict. Further, the fire detector 12 stops at least the latter of the monitoring operation in steps S1 to S7 and the transmission of the fire signal in step S8.

If the relative ratio is less than a predetermined value in step S3, the process may return to step S1, and if it is determined in step S7 that the fire judgment accumulation condition is not satisfied, the process may proceed to step S11.

Further, when the fire judgment unit 86 receives the internal state request command from the disaster prevention receiving panel 10 during the control operation, the fire judgment unit 86 outputs the information (indicating N) regarding the number of occurrences of the failure sign N counted by the counter at that time. The response is transmitted as information, and the disaster prevention receiver 10 is used to judge the reliability of the fire detector 12.

(Judgment of failure sign associated with sensitivity test)
FIG. 6 is an explanatory diagram showing the peak level of the received light signal and the number of occurrences of failure signs when the internal test light source is driven by the sensitivity test of the fire detector.

The sensitivity test unit 88 provided in the detector control unit 54 of the fire detector 12 shown in FIG. 4 received a test instruction signal periodically (for example, once a day) transmitted from the disaster prevention receiver panel 10. In the case of fire, the test light emitting drive unit 76 is instructed to perform a light emitting drive in which the internal test light sources 78R, 80R, 82R, 78L, 80L, 82L are blinked in order at, for example, 2 Hz for a predetermined period (for example, 1 second). A flame pseudo light (test light) corresponding to a fire flame is incident on the detection units 60R and 60L to perform a sensitivity test.

The sensitivity test by the sensitivity test unit 88 has the same contents as those already described with respect to FIG. In addition to this, the sensitivity test unit 88 of the present embodiment has a flame light receiving signal E1R, a first non-flame light receiving signal E2RL, and a second non-flame light receiving signal E3R, E3L output from the fire detection unit 60R in association with the sensitivity test. , And, for each of the flame light receiving signal E1L, the first non-flame light receiving signal E2L, and the second non-flame light receiving signal E3L at the time of the sensitivity test output from the fire detection unit 60L, the peak level of each light receiving signal is detected. , As shown by black circles in FIG. 6 (A), for example, the peak level detected once a day is a predetermined normal range 94 based on the initial value 92 of the peak level detected without deterioration at the time of shipment from the factory. However, if the failure judgment condition is not satisfied without falling below the predetermined failure threshold 96 or below the failure threshold 96, that is, if it is within the failure sign range 98, it is judged as a failure sign and is shown in FIG. 6 (B). As described above, the control is performed to count the number of occurrences N of the failure sign by the counter.

Here, the normal range 94 of the received signal is set to a range sandwiched between, for example, the normal upper limit value 94a and the normal lower limit value 94b around the initial value 92, and is, for example, ± 10% with respect to the initial value 92. Further, the failure threshold value 96 is set to, for example, a value of about 50% of the initial value 92.

The failure sign range exceeds, for example, the range from the upper limit value 94a of the normal range 94 to the addition of 50% of the initial value 92 to the initial value 92, that is, (upper limit value 94a) {(initial value 92) + (initial value 92) + (initial value 92). A range of 50% of the value 92)} may be added to determine a failure sign.

On the other hand, the fire judgment unit 86 compares the number of occurrences of failure signs N calculated by the counter of the sensitivity test unit 88 with the predetermined threshold number Nth set as the failure sign determination accumulation condition, and the number of occurrences of failure signs N. Is determined (confirmed) as a failure sign when the failure sign determination accumulation condition is satisfied at or above the predetermined threshold Nth or exceeds the predetermined threshold Nth, a failure sign signal is transmitted to the disaster prevention receiver 10, and subsequently, a predetermined failure sign is transmitted. Perform processing. The failure sign processing by the fire determination unit 86 is, for example, a process of stopping the transmission of a fire signal.

Further, when the fire determination unit 86 receives the internal state request command signal from the disaster prevention receiving panel 10, it controls to transmit the predictive failure information including the information indicating the number of occurrences N of the failure signs obtained at that time. The disaster prevention receiver panel 10 extracts the number of occurrences N of failure signs, and based on this, evaluates the reliability of the fire detector 12 that transmits a fire signal, and is used to determine whether the fire detector is reliable or has a decrease in reliability.

The number of occurrences of failure signs N counted by the counter is reset, for example, every predetermined period, or when a predetermined period elapses after counting the failure signs. The number of occurrences N of failure signs before reset may be stored as a failure sign information history.

(Sensitivity test operation of fire detector)
FIG. 7 is a flowchart showing a sensitivity test of the fire detector accompanied by determination of a failure sign, and the control operation is performed by the sensitivity test unit 88 and the fire determination unit 86 of the fire detector 12 shown in FIG.

As shown in FIG. 7, for example, taking the fire detection unit 60R of FIG. 4 as an example, the sensitivity test unit 88 is transmitted once a day by designating addresses in order from the disaster prevention receiving panel 10 in step S21. The reception of the test instruction signal (indicating the self-address) is determined, the process proceeds to step S22, and the test light emitting drive unit 76 is instructed to blink the internal test light source 78R at 2 Hz for a predetermined period (for example, 1 second) to drive the sensor. A flame pseudo light (test light) corresponding to a fire flame is incident on the part 64.

Subsequently, the sensitivity test unit 88 proceeds to step S23, detects the peak level of the flame light receiving signal (light receiving signal) E1R by the test light output from the amplification processing unit 66, and is shown in FIG. 5 (A) in step S24. It is determined whether or not it is within the normal range 94, and if it is within the normal range 94, the process proceeds to step S25, and for example, the peak level of the received signal is determined by the initial value (reference received value) 92 stored at the time of the initial sensitivity test at the time of shipment from the factory. The detection sensitivity coefficient is calculated by dividing, and the correction coefficient of the received light signal is calculated and stored as the reciprocal of the detection sensitivity coefficient in step S27, and used for the correction of the received light signal level.

Subsequently, the sensitivity test unit 88 proceeds to step S27, and repeats the process from step S21 until the detection sensitivity coefficient calculated in step S25 reaches a predetermined sensitivity correction limit threshold value (for example, 0.5). The correction limit in step S25 may be the case where the peak level is equal to or lower than the failure threshold value or lower than the failure threshold value, as in step S31.

When the sensitivity test unit 88 determines in step S27 that the detection sensitivity coefficient has reached the sensitivity correction limit threshold value, the sensitivity test unit 88 starts from step S21 until a predetermined sensitivity abnormality determination accumulation condition, for example, a predetermined accumulation number threshold value is reached in step S28. When the process is repeated and the sensitivity abnormality determination accumulation condition in step S28 is satisfied, the sensitivity abnormality signal is transmitted to the disaster prevention receiver 10 in step S29.

Subsequently, the fire determination unit 86 receives the determination of the sensitivity abnormality in the sensitivity test unit 88 and performs a predetermined sensitivity abnormality process in step S30. In this sensitivity abnormality processing, after determining the sensitivity abnormality, there is a high possibility that an erroneous fire judgment is made due to the sensitivity abnormality (for example, a light receiving element failure accompanied by the sensitivity abnormality, an electric circuit failure, etc.). Therefore, for example, the fire judgment unit 86 The fire judgment accumulation condition in the above is set. The accumulation frequency threshold is increased to substantially reduce the fire sensitivity, or the transmission of the fire signal is stopped.

On the other hand, when the sensitivity test unit 88 determines in step S24 that the peak level of the received light signal E1R at the time of the test is out of the normal range 94, the process proceeds to step S31, and the peak level is 96 or less of the failure threshold value or does not fall below the failure threshold value. That is, when it is within the failure sign range 98 shown in FIG. 5 (A), it is determined that the failure sign has occurred and the fire determination unit 86 is notified. The failure sign determination in step S31 is not limited to the peak level of the received signal, and may be determined based on, for example, an integrated value or an average level.

Subsequently, the fire judgment unit 86, which receives the notification of the failure sign determination result from the sensitivity test unit 88, increments (increments) the counter N that counts the number of occurrences of the failure sign in step S32, and causes the failure sign in step S33. When the number of occurrences N of is less than or equal to the threshold number Nth set as the predetermined failure sign determination accumulation condition or less than that, the process from step S21 is repeated.

By repeating such counting of the number of occurrences of failure signs N, the fire determination unit 86 finds that the number of occurrences of failure signs N becomes equal to or greater than the predetermined threshold number Nth in step S33 and satisfies the failure sign determination accumulation condition. It is determined (determined) as a failure sign, the process proceeds to step S35, a failure sign signal is transmitted to the disaster prevention receiving panel 10 to notify the user, and then a predetermined failure sign process is performed in step S36.

In this failure sign processing, for example, the accumulation number threshold value set as the fire determination accumulation condition by the fire determination unit 86 is increased to make the fire determination accumulation condition strict and substantially reduce the fire sensitivity. In addition, even if a fire is judged by the fire judgment unit 86 after that, since there is a high possibility of an erroneous fire judgment due to a failure, the transmission of the fire signal should be stopped to suppress the occurrence of non-fire alarms. You can do it.

Further, when the fire determination unit 86 receives the internal state request command from the disaster prevention receiving panel 10, it responds and transmits the failure sign information including the information indicating the number of occurrences N of the failure sign counted by the counter at that time, and receives the disaster prevention. The board 10 extracts the number of occurrences of the failure sign from the acquired failure sign information of the fire detector 12 to evaluate the reliability, and determines whether the reliability is present or the reliability is lowered.

On the other hand, when the sensitivity test unit 88 determines in step S11 that the peak level of the received light signal has dropped to the failure threshold value of 96 or less, the sensitivity test unit 88 proceeds to step S28 to reach a predetermined accumulation number threshold value set as the sensitivity abnormality determination accumulation condition. The process from step S21 is repeated until the value is reached, and when the sensitivity abnormality determination accumulation condition in step S28 is satisfied, the sensitivity abnormality signal is transmitted to the disaster prevention receiver 10 in step S29, and then a predetermined sensitivity abnormality process is performed in step S30.

Further, the present embodiment takes as an example a case where the number of occurrences of failure signs is obtained by a sensitivity test periodically performed by a fire detector, but the present invention is not limited to this, and an arbitrary timing is obtained by a test instruction operation from the disaster prevention receiving panel 10. Also includes appropriate tests that drive an internal test light source other than the sensitivity test. The same can be done for the left eye 60L. Further, the non-flame light receiving signals E2R and E2L and the second specific flame light receiving signals E3R and E3L at the time of the test can be similarly performed.

[Judgment of failure sign by fire judgment unit and sensitivity test unit]
As another embodiment of the fire detector 12 according to the present invention, the determination of the failure sign by the fire judgment unit 86 shown in the flowchart of FIG. 5 and the determination of the failure sign by the sensitivity test unit 88 shown in the flowchart of FIG. 7 are combined. , The failure sign information including the information indicating the cumulative number of failure signs is received from the fire detector 12 that has transmitted the fire signal by accumulating and counting the number of occurrences N of the failure signs determined by each. The reliability is evaluated from the cumulative number of occurrences of failure signs acquired and extracted on the board 10, and it is judged that the reliability is high and the reliability is low.

Further, in the determination of the failure sign, when the cumulative number of occurrences of the failure sign becomes Nth or more of the predetermined threshold number and the failure sign determination accumulation condition is satisfied, it is determined as the failure sign and the failure sign signal is sent to the disaster prevention receiving panel 10. It is transmitted to notify the user, and then a predetermined failure sign processing is performed.

[Disaster prevention receiver]
(Outline of disaster prevention receiver)
FIG. 8 is a block diagram showing an outline of the functional configuration of the disaster prevention receiver. As shown in FIG. 8, the disaster prevention receiving panel 10 includes a fire monitoring control unit 42, and the fire monitoring control unit 42 is a function realized by, for example, executing a program. Hardware includes a CPU, memory, and various input / output. Use a computer circuit or the like equipped with a port or the like.

Transmission units 35a and 35b are provided for the fire monitoring and control unit 42, and fire detectors 12 installed in the up line tunnel 1a and the down line tunnel 1b are provided on the signal lines 14a and 14b drawn from the transmission units 35a and 35b, respectively. Multiple units are connected.

Further, the fire monitoring control unit 42 is provided with an alarm unit 36 equipped with a speaker, an alarm indicator light, etc., a display unit 37 equipped with a liquid crystal display, a printer, etc., an operation unit 38 equipped with various switches, and an IG slave station facility 20. A modem 39 to be connected is provided, and further, the fire extinguishing pump equipment 16, the cooling pump equipment 18, the ventilation equipment 22, the alarm display board equipment 24, the radio rebroadcasting equipment 26, the television monitoring equipment 28, and the lighting equipment 30 shown in FIG. 1 are provided. A connected I / O unit 40 is provided.

The fire monitoring control unit 42 repeatedly transmits a call signal including a poll command instructing the transmission units 35a and 35b to sequentially specify the addresses of the fire detector 12 via the signal lines 14a and 14b, and the fire detector 42. When the 12 receives the call signal corresponding to the self-address, it returns a response signal such as a fire signal, a sensitivity abnormality sign signal, a sensitivity abnormality signal, a stain sign signal, and a stain signal.

Further, when the fire monitoring control unit 42 determines that a fire has occurred based on the reception of the fire signal from the fire detector 12, the fire alarm output by the alarm unit 36 and the interlocking control of other equipment via the I / O unit 40. For example, predetermined fire processing including display of an entry prohibition alarm by the alarm display board equipment 24 and transmission of a fire transfer signal to the remote monitoring control equipment 32 is performed.

In addition, the fire monitoring and control unit 42 sequentially specifies a test instruction signal that specifies the address of the fire detector 12 at a predetermined cycle (for example, a 24-hour cycle that is once a day) at the time of system startup or during operation. It is transmitted, the fire detector 12 is subjected to a sensitivity test and a dirt test, and each test result is made to respond. For example, when a sensor failure response signal is received, a sensor failure alarm that specifies the address of the fire detector 12 is issued. Control is performed by the alarm sound of the unit 36, the display display of the display unit 37, and printing.

Further, when the fire monitoring control unit 42 receives the response signal of the stain abnormality obtained by the dirt test of the fire detector 12, the fire monitoring and control unit 42 issues a dirt alarm specifying the address of the fire detector to the alarm sound of the alarm unit 36 and the display unit 37. Controls to notify by display and printing of.

Further, when the fire monitoring control unit 42 receives the response signal of the sensor failure or the stain abnormality obtained by the sensitivity test and the dirt test of the fire detector 12, the IG slave station equipment 20 shown in FIG. 1 is used from the modem 39. A transfer signal is transmitted to the remote monitoring and control equipment 32 via the control to notify a failure alarm or an abnormality alarm.

(Reliability judgment control)
In order to control the reliability of the fire detector 12 installed in the tunnel, the control unit 34 of the disaster prevention receiver 10 has a section reliability information generation unit 44, a comprehensive reliability information generation unit 46, and a section reliability judgment unit. The functions of 48 and the fire detector reliability determination unit 50 are provided.

When the section reliability information generation unit 44 determines that the reliability determination timing for each predetermined period, for example, the reliability determination timing once a week has been reached, the internal state request command for sequentially designating the addresses of the fire detector 12 A signal is transmitted, failure sign information including information indicating the number of occurrences N of the failure sign held by the fire detector 12 at that time is collected, and each section A1 to An shown in FIG. 2 (A) is divided into sections. Control is performed to generate section reliability information indicating the section average number of occurrences of failure signs, which is the average number of occurrences of failure signs of, for example, three fire detectors 12 provided in each of A1 to An.

The total reliability information generation unit 46 is the entire tunnel obtained by averaging the average number of occurrences of failure signs of each section A1 to An acquired from the section reliability information of the sections A1 to An generated by the section reliability information generation unit 44. Control is performed to generate total failure sign information indicating the total average number of occurrences of failure signs as (for example, 14 units of signal lines). The total reliability information generation unit 46 may obtain the total average number of occurrences by averaging the number of occurrences of failure signs of all the fire detectors 12 collected for the predetermined signal system.

Further, the section reliability determination unit 48 compares the average number of occurrences of failure signs generated by the section reliability information generation unit 44 with the total average number of occurrences of failure signs generated by the total reliability information generation unit 46. However, a specific section that satisfies a predetermined condition, for example, a section having an average number of occurrences of a failure sign that is equal to or greater than a predetermined value or exceeds a predetermined value from the total average number of occurrences of a failure sign is determined to be a reliability deterioration section. Then, control is performed to notify the fact.

Further, the fire detector reliability determination unit 50 targets the fire detector 12 in the section determined by the section reliability board stage section 48 to have a decrease in reliability, and measures the failure sign with respect to the average number of occurrences of the failure sign in the section. The fire detector 12 whose number of occurrences exceeds or exceeds a predetermined value is determined to be a reliability deterioration detector, and control is performed to notify the fact.

Here, when the fire detector reliability determination unit 50 does not determine the decrease in reliability of the fire detector 12 (when there is no fire detector 12 determined to decrease in reliability), the section reliability determination unit 48 For example, via the alarm unit 36, notifies that there is a factor that impedes reliability in the section where the decrease in reliability is determined and a predetermined countermeasure.

For example, the section reliability determination unit 48 notifies, for example, via the alarm unit 36, that prompts confirmation of environmental factors such as temperature, humidity, dust, electrical noise, and ambient light as factors that impede the reliability of the section. In addition, as a countermeasure against this, for example, through the display unit 37, it is necessary to investigate the cause by investigating the section environment, check the appearance of the fire detector 12 installed in the section, and inspect the operation test. Display guidance to show.

Further, when the fire detector reliability determination unit 50 determines the reliability decrease of a specific fire detector 12 in the section determined to be the reliability decrease, for example, the fire detector via the alarm unit 36. Notifies that there may be a factor that impedes reliability in the surrounding environment of 12 and prompts for a predetermined action including replacement of the fire detector. For example, the fire detector reliability determination unit 50 uses the alarm unit 36 as an installation environmental factor that impedes the reliability of the fire detector 12, such as temperature, humidity, dust, electrical noise, and ambient light. In addition, as a countermeasure against this through the display unit 37, investigation of the cause by investigation of the section environment, appearance confirmation of the fire detector 12 installed in the section, operation test, etc. The necessity of inspection and the guidance display prompting the replacement of the fire detector 12 are performed.

(Control operation for reliability judgment)
FIG. 9 is a flowchart showing reliability judgment control by the disaster prevention receiver, and shows the section reliability information generation unit 44, the comprehensive reliability information generation unit 46, the section reliability judgment unit 48, and the fire detector reliability shown in FIG. The control operation is performed by the control unit 34 of the disaster prevention receiver 10 having the function of the sex determination unit 50. For the sake of simplicity, it is assumed that there is only one signal system here.

As shown in FIG. 9, when the control unit 34 of the disaster prevention receiver 10 determines in step S41 that the reliability information collection timing has been reached, for example, once a week, the control unit 34 proceeds to step S42 and proceeds to step S42, where the signal system fire detector 12 The internal state request command signal for which the addresses of the above are sequentially specified is transmitted, the failure sign information including the information indicating the number of occurrences of the failure sign held by the fire detector 12 at that time is acquired, and all the fires are detected in step S43. The total reliability information indicating the total average number of occurrences of the failure sign is generated by the average number of occurrences of the failure sign of the device 12, and then the number of occurrences of the failure sign of the fire detector 12 provided for each section in step S44. Is averaged to obtain the average number of occurrences of a failure sign in the section, and section reliability information is generated. Instead of steps S43 and S44, the average number of occurrences of failure signs in each section is first obtained, and then the average number of occurrences of failure signs in all sections is averaged to obtain the total average number of failure signs. You may ask for it.

Subsequently, in step 45, the control unit 34 compares the total average number of occurrences of failure signs with the average number of occurrences of failure signs in each section, and the section of failure signs equal to or greater than a predetermined value with respect to the total average number of failure signs. When the section having the average number of occurrences is determined, the process proceeds to step S46, and the section with reduced reliability is determined.

Subsequently, the control unit 34 compares the average number of occurrences of the failure sign in the section determined to be reduced in reliability with the number of occurrences of the failure sign of each fire detector 12 provided in the section, and determines the failure sign. When the fire detector 12 having the number of occurrences of the failure sign of the failure sign equal to or more than the predetermined value is determined with respect to the average number of occurrences in the section, the process proceeds to step S50, the fire detector 12 with reduced reliability is determined, and the reliability is determined in step S51. The fire detector 12 judged to be deteriorated and the section and the countermeasure against the decrease in reliability are notified, and the fire detector 12 judged to be decreased in reliability is set in the fire monitoring control unit 42 in step S52 in association with the address, and the reliability is increased. It enables fire control (fire processing corresponding to the decrease in reliability of the fire detector) corresponding to the fire signal from the fire detector 12 determined to be deteriorated.

On the other hand, if the fire detector 12 having the number of occurrences of the failure sign of the failure sign equal to or higher than the predetermined value is not determined in step S47, the control unit 34 proceeds to step S48 and trusts. The section determined to be degraded is notified, and then the action for the section determined to be degraded in step S49 is notified.

In the reliability determination control of FIG. 9, the decrease in reliability is determined, but the same applies when the decrease in reliability is determined.

(Fire treatment corresponding to reliability judgment)
When the fire detector reliability determination unit 50 provided in the control unit 34 of the disaster prevention receiver 10 of FIG. 8 determines that the reliability of the specific fire detector 12 in the section determined to be the reliability decrease is reduced. The information of the fire detector 12 is set in the fire monitoring control unit 42, and when the fire monitoring control unit 42 receives the fire signal from the fire detector 12, the fire processing is performed according to whether the fire is reliable or the reliability is lowered. Do.

In the evaluation of the reliability of the fire detector 12 by the fire monitoring control unit 42, for example, the number of occurrences N of the failure sign of the fire detector 12 acquired and extracted as the failure sign information is a predetermined threshold value set as the reliability judgment accumulation condition. If it is less than or equal to the number of times Nref or less than the threshold number Nref, it is judged to be reliable, and if it is equal to or more than the predetermined number of times Nref or exceeds the threshold number Nref, it is judged to be reliable.

When the fire detector 12 does not transmit the fire signal when the failure sign is determined, for example, the threshold number Nref for setting the reliability judgment accumulation condition is determined by the fire determination unit 86 shown in FIG. A value lower than the threshold number Nth set as the accumulation condition may be set.

When the fire monitoring control unit 42 determines that the fire detector 12 that has transmitted the fire signal is reliable, the fire monitoring control unit 42 transmits a fire recovery command signal to the fire detector 12 to restore the fire, and then receives the fire signal again. It is judged that there is a fire, and the fire alarm is output, at least the interlocking control of other equipment including the display of the entry prohibition alarm by the alarm display board equipment 24, and the predetermined fire processing including the transmission of the fire transfer signal to the remote monitoring control equipment 32. Do.

On the other hand, when the fire monitoring control unit 42 determines that the reliability of the fire detector 12 that has transmitted the fire signal has deteriorated, the fire monitoring control unit 42 transmits a fire detector 12 storage condition change command signal (accumulation condition tightening command) to generate a fire. Set the first fire judgment accumulation condition of the detector 12 (accumulation condition in step S7 of FIG. 5) Increase the accumulation number threshold to make it a stricter (more difficult to reach the fire judgment) second fire judgment accumulation condition. It is changed, specifically, for example, the accumulation number threshold is raised to substantially reduce the sensitivity to fire, and then a recovery command signal is transmitted for recovery.

In this state, the fire monitoring control unit 42 transmits the first fire signal in which the fire judgment storage condition is changed, and the second fire signal due to the satisfaction of the second fire judgment storage condition from the fire detector 12 Is received, or when a fire signal is received from an adjacent fire detector 12 that duplicately monitors the same detection area as the fire detector 12 that transmitted the first fire signal, it is determined to be a fire. , Output of a fire alarm, interlocking control of other equipment including at least display of an entry prohibition alarm by the alarm display board equipment 24, and transmission of a fire transfer signal to the remote monitoring control equipment 32, and perform predetermined fire processing.

In this way, when the fire monitoring and control unit 42 determines that the fire detector 12 that has transmitted the fire signal has a reduced reliability, the fire detector 12 may determine that the fire is a fire due to a failure sign other than the fire and transmit the fire signal. Since the fire judgment accumulation conditions of the fire detector are strictly changed, the possibility of transmitting a fire signal again due to a non-fire factor of unknown cause after restoration is reduced, and at this time, the adjacent fire detector 12 is reliable. It is extremely unlikely that a fire signal will be transmitted when the fire is not reduced and it is not an actual fire, and the fire detector 12 recovered by transmitting the first fire signal and the fire detector 12a adjacent thereto By determining a fire when a fire signal is received from one or both of them, it is possible to reliably prevent a fire from being determined as a fire despite the fact that it is not a fire.

Further, the fire monitoring control unit 42 determines that the fire detector 12 that has transmitted the first fire signal has a reduced reliability, and then determines a fire based on the fire detector 12 and / or a fire detector 12a adjacent thereto. If is not established, a non-fire transfer signal indicating that a non-fire (wrong) fire signal has been received from the fire detector 12 is transmitted to the remote monitoring control equipment 32 to notify the remote monitoring and control equipment 32.

As a result, the person in charge of management on the remote monitoring and control equipment 32 side can know the state in which the reliability of the fire detector 12, which may cause a non-fire report, has deteriorated, and the tunnel operation such as strengthening the inspection of the fire detector 12 can be performed. Make it available for management efficiency.

Further, when the fire monitoring control unit 42 determines that the reliability of the fire detector 12 that has transmitted the fire signal is low, the storage conditions are changed to the adjacent fire detector 12a that duplicately monitors the detection area of the fire detector 12. By transmitting a command signal (accumulation condition relaxation command) and lowering the accumulation frequency threshold in step S7 of FIG. 5, the first fire determination condition is relaxed (making it easier to reach the fire determination). The fire judgment conditions may be changed to substantially increase the sensitivity to fire.

Specifically, for example, by lowering the accumulation number threshold set as the first fire judgment accumulation condition of the adjacent fire detector 12 and changing to the third fire judgment condition, if it is an actual fire, it is adjacent. A fire signal from the disaster detector 12a is quickly transmitted, or a fire is promptly transmitted by transmitting the fire signal again after the fire detector 12 which is judged to have deteriorated reliability by transmitting the first fire signal is restored. Processing can be performed.

If the fire detector 12 can transmit a fire signal that distinguishes between the right eye and the left eye, for example, the fire detector (left) that monitors the detection area of the right eye of the fire detector 12 with the left eye. The eye) may be an adjacent fire detector 12a. If the right eye and the left eye cannot be distinguished, the fire detector 12a on either side or one of them is used.

[Modification of the present invention]
(Fire detector)
A three-wavelength fire detector is taken as an example, but other methods may be used, for example, in the 4.5 μm band which is the resonance emission band of CO ₂ , and in the wavelength band on the short wavelength side thereof, for example, near 5.0 μm. It may be a two-wavelength flame detector that detects infrared energy and determines the presence or absence of a flame based on the relative ratio of each received signal in these two wavelength bands.

(Change of storage conditions)
Further, in the change of the fire judgment accumulation condition of the fire detector 12 in the above embodiment, for example, the change of the fire judgment accumulation number threshold value, the fire detector 12 itself tightens the failure sign judgment condition as the failure sign processing (fire sensitivity). When the accumulation number threshold is increased (step S14 in FIG. 5) and when the disaster prevention receiver 10 determines that the reliability is lowered, the fire judgment accumulation condition is strict (relaxed sensitivity). There is a case where the accumulation number threshold is increased (step S51 in FIG. 8), and when both are performed in duplicate, the total accumulation time becomes longer than necessary and the detection of the fire is not delayed. Change as appropriate.

(P-type tunnel disaster prevention system)
The above embodiment shows a so-called R-type tunnel disaster prevention system in which a fire detection with an address set is connected to a signal line drawn from a disaster prevention receiver to monitor a fire, but the present invention is not limited to this. The same applies to the so-called P-type tunnel disaster prevention system in which a signal line is drawn from the disaster prevention receiver for each fire detector and a fire detector is connected to each signal line.

In a general P-type tunnel disaster prevention system, information communication such as the specific number of occurrences of signs cannot be performed between the disaster prevention receiver and the fire detector. Therefore, the disaster prevention receiver shown in the above embodiment is used. The function to evaluate the reliability of the fire detector and judge that it is reliable and the reliability is low is provided on the fire detector side, and when the fire detector judges the reliability is low, for example, the signal line is disconnected. By doing so, or by providing a dedicated line for the reliability reduction signal, the reliability information is transmitted to the disaster prevention receiver to notify the reliability reduction.

(Other)
Further, 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: Fire detector 14a, 14b: Signal line 16: Fire extinguishing pump equipment 18: Cooling pump equipment 20: IG slave station equipment 22: Ventilation equipment 24: Alarm display Board equipment 26: Radio rebroadcasting equipment 28: TV monitoring equipment 30: Lighting equipment 32: Remote monitoring control equipment 34: Panel control units 35a, 35b: Transmission unit 42: Fire monitoring control unit 44: Section reliability information generation unit 46: Comprehensive reliability information generation unit 48: Section reliability information judgment unit 50: Bulk detector reliability information judgment unit 90R, 90L: Translucent window 92R, 92L: Translucent window for test light source 54: Detector control unit 56: Transmission unit 58: Power supply unit 60R, 60L: Fire detection unit 64, 68, 72: Sensor unit 66, 70, 74: Amplification processing unit 76: Test light emission drive unit 78R, 78L, 80R, 80L, 82R, 82L: Internal test Light sources 84R, 84L: External test light source 86: Fire judgment unit 88: Sensitivity test unit 90: Dirt test unit

Claims (9)

In a tunnel disaster prevention system in which the inside of a tunnel is divided into a plurality of sections and fire detectors are provided in each of the sections.
A section reliability information generation unit that generates section reliability information including the section average number of failure signs, which is the average number of occurrences of a predetermined failure sign of the fire detector provided in the section.
A comprehensive reliability information generator that generates comprehensive failure sign information including the total average number of failure signs that averages the average number of occurrences of the failure sign in each section of the plurality of sections.
When comparing the average number of occurrences of the failure sign in the section and the total average number of occurrences of the failure sign, a section reliability determination unit that determines and notifies a specific section that satisfies a predetermined condition as a decrease in reliability.
A tunnel disaster prevention system characterized by the establishment of.
In the tunnel disaster prevention system according to claim 1, further
Fire detector reliability judgment that notifies the fire detector that the number of occurrences of the failure sign is equal to or more than a predetermined value or exceeds the predetermined value with respect to the section average number of occurrences of the failure sign as a decrease in reliability. A tunnel disaster prevention system characterized by the establishment of a department.
In the tunnel disaster prevention system according to claim 2, the section reliability determination unit determines the reliability decrease when the fire detector reliability determination unit does not determine the reliability decrease of the fire detector. A tunnel disaster prevention system characterized in that a factor that hinders reliability exists in the section and that a predetermined countermeasure is notified.
In the tunnel disaster prevention system according to claim 2.
When the fire detector reliability determination unit determines that the reliability of the fire detector has deteriorated, the fire detector reliability determination unit includes the fact that there is a factor that impedes the reliability of the surrounding environment of the fire detector and the replacement of the fire detector. A tunnel disaster prevention system characterized by notifying a predetermined response.
In the tunnel disaster prevention system according to claim 2.
When the fire detector reliability determination unit determines that the reliability of the fire detector is lowered, the predetermined first fire judgment accumulation condition of the fire detector is stricter than the first fire judgment accumulation condition. At least one of the fire detector that changed the predetermined second fire judgment storage condition and restored, and the fire detector that changed the fire judgment storage condition and the adjacent fire detector that duplicately monitors the detection area of the fire detector. A tunnel disaster prevention system characterized in that when a fire signal is received from, the predetermined fire treatment is performed.
In the tunnel disaster prevention system according to claim 2.
When the fire detector reliability determination unit determines that the reliability of the fire detector has deteriorated, at least one of the adjacent fire detectors that duplicately monitor the fire detector and the detection area of the fire detector. A tunnel disaster prevention system characterized in that the fire judgment accumulation condition of the above is changed to a predetermined third fire judgment condition accumulation condition in which the first fire judgment accumulation condition is relaxed.
In the tunnel disaster prevention system according to any one of claims 1 to 6.
The fire detector determines a fire by a plurality of fire determination stages, and is determined to be a fire in at least one of the plurality of fire determination stages, but is determined to be a fire in the remaining fire determination stages. A tunnel disaster prevention system characterized in that it determines the failure sign and obtains the number of occurrences of the failure sign when the failure is not achieved.
In the tunnel disaster prevention system according to any one of claims 1 to 6.
The fire detector is subjected to a test for determining a failure of the fire detection unit based on the light receiving signal when the test light source is driven, and the level of the received light signal according to the test is out of the predetermined normal range, but is predetermined. A tunnel disaster prevention system characterized in that when the failure judgment conditions of the above are not satisfied, it is determined as a failure sign and the number of occurrences of the failure sign is calculated.
In the tunnel disaster prevention system according to any one of claims 1 to 6.
In the tunnel disaster prevention system described in the claims
The fire detector
A fire is judged by a plurality of fire judgment stages, and if a fire is not judged and a fire is not determined in at least one of the plurality of fire judgment stages, it is judged as a failure sign and the relevant fire is determined. Find the number of occurrences of the first failure sign,
We are conducting a test to determine the failure of the fire detection unit that drives the test light source and outputs the received light signal. The level of the received signal according to the test is out of the predetermined normal range, but the predetermined failure determination condition is satisfied. If it does not, it is judged as a failure sign and the number of occurrences of the second failure sign is calculated.
The section reliability information positive part is a failure sign obtained by averaging one or both of the number of occurrences of the first failure sign and the number of occurrences of the second failure sign of the fire detector provided in the section. A tunnel disaster prevention system characterized by generating section reliability information including the average number of occurrences of a section.

Images