Disaster prevention system

Abstract

To enable appropriate measures to be taken by determining the degree of deterioration of a fire detector and reporting it before a false fire alarm is issued. [Solution] Fires are monitored by connecting a fire detector 12 to signal lines 14a, 14b drawn from a disaster prevention receiving panel 10 into the tunnel. A deterioration determination unit 48 of the disaster prevention receiving panel 10 determines the degree of deterioration of the fire detector 12 and causes the disaster prevention receiving panel 10 to issue a warning. The deterioration determination unit 48 determines the degree of deterioration by measuring the temperature, humidity, etc., which are environmental stressors for the fire detector 12, and increasing the deterioration count value when the measured value or its change exceeds a predetermined value. Furthermore, when the total deterioration count value, which includes the deterioration count value due to aging, reaches a predetermined deterioration threshold, the deterioration is determined and a warning is issued, thereby prompting inspection, confirmation, investigation, etc.

Claims

1. A fire prevention system comprising a pair of fire detectors, each equipped with a pair of fire detection units that detect light energy from each of two adjacent detection areas in a pair of continuous detection areas along one direction, provided along the arrangement of the detection areas, wherein the fire detectors monitor for the occurrence of a fire in the detection area based on the light energy detected from the detection area, and when any of the fire detectors detect a fire, the fire prevention receiving panel outputs a fire alarm, The fire detector includes a test unit that determines an abnormality in the detection sensitivity of the light energy by the fire detection unit through a predetermined test. The fire prevention receiving panel includes a deterioration determination unit that determines the deterioration of the fire detectors that lead to a false fire alarm output and are not tested by the test unit, based on at least one of the environmental stress in the operating environment of the fire detectors and the service life of each fire detector, measured for each section in which a predetermined number of fire detectors are located. The aforementioned deterioration determination unit is As environmental stress, at least one of the following is measured: temperature and humidity in the operating environment, and vibration and electrical noise applied to the fire detector. A deterioration count value is generated based on either the aforementioned environmental stress or its change and the deterioration of the fire detector over the aforementioned period of use to date, and the deterioration status corresponding to the deterioration determined based on the deterioration count value is notified. The vibrations applied to the aforementioned fire detector include collision vibrations resulting from vehicle accidents and shock vibrations caused by large-scale earthquakes. The fire prevention system is characterized in that the electrical noise applied to the fire detector is a surge applied to the fire detector from an external source, and includes an induced surge caused by lightning.

2. A fire prevention system comprising a pair of fire detectors, each equipped with a pair of fire detection units that detect light energy from each of two adjacent detection areas in a pair of continuous detection areas along one direction, provided along the arrangement of the detection areas, wherein the fire detectors monitor for the occurrence of a fire in the detection area based on the light energy detected from the detection area, and when any of the fire detectors detect a fire, the fire prevention receiving panel outputs a fire alarm, The fire detector includes a test unit that determines an abnormality in the detection sensitivity of the light energy by the fire detection unit through a predetermined test. The disaster prevention receiving panel includes a deterioration determination unit that determines the deterioration of the fire detector, which is an abnormality of the fire detector that leads to a false fire alarm output and is not tested by the test unit, based on one or more types of environmental stress in the operating environment of the fire detector, measured for each section in which a predetermined number of fire detectors are located. The aforementioned deterioration determination unit is As environmental stress, at least one of the following is measured: temperature and humidity in the operating environment, and vibration and electrical noise applied to the fire detector. Based on the environmental stress or the amount of change therein, a degradation count value is generated, and the degradation status corresponding to the degradation determined based on the degradation count value is reported. The vibrations applied to the aforementioned fire detector include collision vibrations resulting from vehicle accidents and shock vibrations caused by large-scale earthquakes. The fire prevention system is characterized in that the electrical noise applied to the fire detector is a surge applied to the fire detector from an external source, and includes an induced surge caused by lightning.

3. A fire prevention system comprising multiple fire detectors arranged along the layout of the detection areas, each of which detects light energy from adjacent detection areas within a pair of continuous detection areas along one direction using multiple light receiving sensors to monitor for fires and outputs a fire detection signal when a fire is detected, wherein a fire prevention receiving panel that receives the fire detection signal outputs a fire alarm, The fire detector includes a test unit that determines, by predetermined tests, an abnormality in which the light energy detection sensitivity of the light receiving sensor drops to a predetermined level. The fire prevention receiving panel includes a deterioration determination unit that determines the deterioration of the fire detectors that lead to a false fire alarm output and are not tested by the test unit, based on at least one of the environmental stress in the operating environment of the fire detectors and the service life of each fire detector, measured for each section in which a predetermined number of fire detectors are located. The aforementioned deterioration determination unit is As environmental stress, at least one of the following is measured: temperature and humidity in the operating environment, and vibration and electrical noise applied to the fire detector. A deterioration count value is generated based on either the environmental stress or its change and the deterioration of the fire detector over the period of use to date, and the deterioration status corresponding to the deterioration determined based on the deterioration count value is notified. The vibrations applied to the aforementioned fire detector include collision vibrations resulting from vehicle accidents and shock vibrations caused by large-scale earthquakes. The fire prevention system is characterized in that the electrical noise applied to the fire detector is a surge applied to the fire detector from an external source, and includes an induced surge caused by lightning.

4. A fire prevention system comprising multiple fire detectors arranged along the layout of the detection areas, each of which detects light energy from adjacent detection areas within a pair of continuous detection areas along one direction using multiple light receiving sensors to monitor for fires and outputs a fire detection signal when a fire is detected, wherein a fire prevention receiving panel that receives the fire detection signal outputs a fire alarm, The fire detector includes a test unit that determines, by predetermined tests, an abnormality in which the light energy detection sensitivity of the light receiving sensor drops to a predetermined level. The disaster prevention receiving panel includes a deterioration determination unit that determines the deterioration of the fire detector, which is an abnormality of the fire detector that leads to a false fire alarm output and is not tested by the test unit, based on one or more types of environmental stress in the operating environment of the fire detector, measured for each section in which a predetermined number of fire detectors are located. The aforementioned deterioration determination unit is As environmental stress, at least one of the following is measured: temperature and humidity in the operating environment, and vibration and electrical noise applied to the fire detector. Based on the environmental stress or the amount of change therein, a degradation count value is generated, and the degradation status corresponding to the degradation determined based on the degradation count value is reported. The vibrations applied to the aforementioned fire detector include collision vibrations resulting from vehicle accidents and shock vibrations caused by large-scale earthquakes. The fire prevention system is characterized in that the electrical noise applied to the fire detector is a surge applied to the fire detector from an external source, and includes an induced surge caused by lightning.

5. A disaster prevention system according to any one of claims 1 to 4, The aforementioned deterioration determination unit increases the deterioration count value when the amount of change in environmental stress exceeds a predetermined value, and when the deterioration count value reaches a predetermined deterioration threshold, it notifies the deterioration status corresponding to the deterioration determined based on the deterioration count value.

6. A disaster prevention system according to any one of claims 1 to 4, The aforementioned test unit is characterized in that it determines a decrease in the detection sensitivity of the light energy by the fire detector as an abnormality in the detection sensitivity.

7. A disaster prevention system according to any one of claims 1 to 4, A disaster prevention system characterized in that the sensors for measuring the environmental stress are arranged in predetermined sections where multiple fire detectors are located.

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