JP7249380B2 - Fire prevention system and fire detector - Google Patents

Fire prevention system and fire detector Download PDF

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JP7249380B2
JP7249380B2 JP2021099901A JP2021099901A JP7249380B2 JP 7249380 B2 JP7249380 B2 JP 7249380B2 JP 2021099901 A JP2021099901 A JP 2021099901A JP 2021099901 A JP2021099901 A JP 2021099901A JP 7249380 B2 JP7249380 B2 JP 7249380B2
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泰周 杉山
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Hochiki Corp
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Description

本発明は、検知エリアの火災を検出する火災検知器を設けた防災システム及びその火災検知器に関する。
TECHNICAL FIELD The present invention relates to a disaster prevention system provided with a fire detector for detecting a fire in a detection area , and its fire detector .

従来、自動車専用道路等のトンネルには、トンネル内で発生する火災事故から人身及び車両等を守るため、火災を監視する火災検知器が設置され、防災受信盤から引き出された信号線に接続されている。 Conventionally, in order to protect people and vehicles from fire accidents that occur in tunnels, fire detectors are installed in tunnels such as automobile roads to monitor fires, and are connected to signal lines drawn from disaster prevention receivers. ing.

火災検知器は左右の両方向に検出エリアを持ち、トンネルの長手方向に沿って、隣接して配置される火災検知器との検出エリアが相互補完的に重なるように、例えば、２５ｍ間隔、或いは５０ｍ間隔で連続的に配置されている。 The fire detectors have detection areas in both the left and right directions, and along the longitudinal direction of the tunnel, the detection areas of the fire detectors placed adjacent to each other complementarily overlap each other, for example, at intervals of 25 m or 50 m. continuously spaced apart.

また、火災検知器は透光性窓を介してトンネル内で発生する火災炎からの放射線、たとえば赤外線を監視しており、炎の監視機能を維持するために、受光素子の感度を監視するための感度試験や透光性窓の汚れを監視するための汚れ試験を行っている。 In addition, fire detectors monitor radiation from fire flames generated in tunnels through translucent windows, such as infrared radiation. sensitivity tests and contamination tests to monitor the contamination of translucent windows.

受光素子の感度試験は、防災受信盤から定期的に送信される試験信号を受信した場合に、疑似的な炎からの光に相当する試験光を試験用光源から受光素子に入射して受光感度を検出し、受光感度が所定の閾値感度に低下するまでは、検出感度の逆数となる補正値で受光値を補正し、検出感度が所定の感度閾値に低下して補正が不可能となった場合には、受光素子の故障信号を防災受信盤に送信してセンサ故障警報を出力させている。また、感度閾値に対しそれより高い予告感度閾値を設定し、検出感度が予告感度閾値を下回った場合には感度異常の予告警報を出力させている。 In the sensitivity test of the light receiving element, when a test signal periodically transmitted from the disaster prevention receiving panel is received, test light corresponding to light from a simulated flame is incident on the light receiving element from the test light source to measure the light receiving sensitivity. is detected, and the received light value is corrected with a correction value that is the reciprocal of the detection sensitivity until the light receiving sensitivity decreases to a predetermined threshold sensitivity. In this case, a failure signal of the light-receiving element is transmitted to the disaster prevention receiving panel to output a sensor failure alarm. Further, a notice sensitivity threshold higher than the sensitivity threshold is set, and if the detection sensitivity falls below the notice sensitivity threshold, a notice warning of sensitivity abnormality is output.

透光性窓の汚れ試験は、防災受信盤から定期的に送信される試験信号を受信した場合に、火災検知器の外側に設けられた試験光源から試験光を透光性窓に入射し、受光素子で受光して減光率を求め、減光率が所定の汚れ閾値を超えた場合に汚れ異常信号を防災受信盤に送信して汚れ警報を出力させている。また、汚れ閾値に対しそれより低い予告汚れ閾値を設定し、減光率が汚れ予告閾値を超えた場合に汚れ異常の予告警報を出力させている。 In the contamination test of the translucent window, when a test signal periodically transmitted from the disaster prevention receiver panel is received, the test light is incident on the translucent window from the test light source provided outside the fire detector, Light is received by a light-receiving element to obtain a light attenuation rate, and when the light attenuation rate exceeds a predetermined dirt threshold value, a dirt abnormality signal is transmitted to the disaster prevention receiving panel to output a dirt alarm. Further, a lower notice dirt threshold than the dirt threshold is set, and when the light reduction rate exceeds the dirt notice threshold, a notice alarm of dirt abnormality is output.

特開平６－３２５２７１号公報JP-A-6-325271 特開２００２－２４６９６２号公報JP-A-2002-246962 特開平１１－１２８３８１号公報JP-A-11-128381 特開２０１４－０２６４４６号公報JP 2014-026446 A 特開２０００－３１５２８５号公報JP-A-2000-315285 特開２００７－２４９５２０号公報JP 2007-249520 A 特許第５３０２０８６号公報Japanese Patent No. 5302086

しかしながら、このような従来の火災検知器の試験にあっては、落雷等による受光素子及びその信号処理回路の故障や透光性窓の汚れ以外の障害を検知することができず、運用期間が長くなった場合、感度試験によるセンサ故障や汚れ試験による汚れ異常が検出されることなく正常に運用されていると思われる状態で、突然、火災検知器が動作不良を起こす事態が度々発生しており、トンネル防災システムの信頼性を確保できないおそれがある。 However, in the test of such a conventional fire detector, failures other than failure of the light-receiving element and its signal processing circuit due to lightning strikes, etc., and dirt on the translucent window cannot be detected, and the operation period is long. If it takes a long time, the fire detector suddenly malfunctions frequently in a state where it seems that the sensor is operating normally without detection of sensor failure by the sensitivity test or contamination abnormality by the contamination test. There is a risk that the reliability of the tunnel disaster prevention system cannot be ensured.

本発明は、感度試験や汚れ試験で判断できない火災検知器の異常を監視して動作不良を起こす前に報知可能とする防災システム及びその火災検知器を提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a disaster prevention system and its fire detector that can monitor an abnormality of the fire detector that cannot be determined by a sensitivity test or a contamination test and notify the user before malfunction occurs.

（防災システム及び火災検知器１）
本発明は、検知エリアの火災を検出する火災検知器を設けた防災システム及びその火災検知器であって、
火災検知器は、機能構成部毎に回路ブロックが分けられて構成され、
少なくとも火災検知器の故障状態である故障異常に至る以前の劣化状態と認められる劣化異常を判定する異常判定部を備え、
異常判定部は、劣化異常の判定対象とする回路ブロックの各々について、火災検知器の検出感度が所定レベルに低下する検出感度異常を判定する試験時に電源部から回路ブロックの各々に出力される電源電圧又は電源電流の少なくとも何れか一方に基づき劣化異常を判定することにより、当該劣化異常が発生した回路ブロックを特定可能としたことを特徴とする。
(Disaster prevention system and fire detector 1 )
The present invention is a disaster prevention system provided with a fire detector that detects a fire in a detection area and the fire detector ,
The fire detector is configured with circuit blocks divided for each functional component,
At least an abnormality determination unit that determines a deterioration abnormality recognized as a deterioration state before reaching a failure abnormality that is a failure state of the fire detector,
The anomaly determination unit outputs power output from the power supply unit to each circuit block during a test for determining detection sensitivity anomaly in which the detection sensitivity of the fire detector drops to a predetermined level for each circuit block to be determined for deterioration anomaly. It is characterized in that the circuit block in which the deterioration abnormality has occurred can be specified by judging the deterioration abnormality based on at least one of the voltage and the power supply current .

（基本的な効果）
本発明は、検知エリアの火災を検出する火災検知器を設けた防災システムであって、少なくとも火災検知器の故障異常に至る以前の劣化状態と認められる劣化異常を判定する異常判定部を備え、異常判定部が劣化異常の判定対象とする火災検知器の複数の機能構成部の各々について劣化異常が発生した箇所を特定可能に劣化異常を判定することにより、当該劣化異常が発生した機能構成部を特定可能としたことを特徴とし、より具体的には、火災検知器は、機能構成部毎の回路ブロックが分けられて構成され、異常判定部が回路ブロックの各々について内部電圧又は消費電流の少なくとも何れか一方に基づき劣化異常を判定することにより、当該劣化異常が発生した回路ブロックを特定可能とするようにしたため、システムの運用期間の長期化に伴い火災検知器の回路部の経年劣化が進んで回路機能が低下すると、疑似的な火災検知状態が作り出される試験状態で測定された内部電圧及び又は消費電流が低下する変化が表れ、このような試験時の内部電圧や消費電流の低下から回路劣化の進み具合を判断し、動作不良を起こす前に劣化異常を報知させることができ、動作不良を起こす前に、劣化異常を起こしている火災検知器を予備の火災検知器に交換する等の対応が可能となり、システムの経年劣化が進んでも、火災監視の信頼性を継続的に維持可能とする。また、劣化異常した箇所を特定することが出来る。 (basic effect)
The present invention is a disaster prevention system provided with a fire detector that detects a fire in a detection area, comprising an abnormality determination unit that determines at least a deterioration abnormality that is recognized as a deterioration state before failure abnormality of the fire detector, By determining the deterioration abnormality so that the location where the deterioration abnormality has occurred can be specified for each of the plurality of functional configuration units of the fire detector that the abnormality determination unit is to determine the deterioration abnormality, the functional configuration unit where the deterioration abnormality has occurred More specifically, the fire detector is configured by dividing the circuit block for each functional component, and the abnormality determination unit determines the internal voltage or current consumption of each circuit block. By judging the deterioration abnormality based on at least one of them, it is possible to identify the circuit block in which the deterioration abnormality has occurred. If the circuit function deteriorates, a change in the internal voltage and/or current consumption measured under test conditions that create a false fire detection state will appear. It is possible to determine the progress of circuit deterioration and notify deterioration abnormalities before malfunctions occur. , and the reliability of fire monitoring can be maintained continuously even if the system deteriorates over time. In addition, it is possible to identify the location where deterioration has occurred.

（火災検知器での劣化異常判断による効果）
また、異常判定部は火災検知器に備えられ、火災検知器は、異常判定部が前記劣化異常を判定した場合、例えば自器の回路ブロックの何れかの内部電圧又は消費電流の少なくとも何れか一方に所定の低下又は消費電流に所定の増加が認められる場合に、劣化異常を判定して劣化異常信号を防災受信盤へ送信し、防災受信盤は、火災検知器から劣化異常信号を受信した場合に、当該火災検知器の劣化異常を報知するようにしたため、試験時の内部電圧や消費電流の低下から回路劣化の進み具合を判断して動作不良を起こす前に劣化異常を報知させることができ、また劣化異常を火災検知器側で判断することで、防災受信盤の処理負担を低減できる。 (Effect of deterioration abnormality judgment by fire detector)
Further, the abnormality determination unit is provided in the fire detector, and when the abnormality determination unit determines the deterioration abnormality, the fire detector detects, for example, at least one of the internal voltage or current consumption of any of its own circuit blocks. When a predetermined decrease in the current consumption or a predetermined increase in current consumption is recognized, a deterioration abnormality is determined and a deterioration abnormality signal is sent to the disaster prevention reception panel, and the disaster prevention reception panel receives the deterioration abnormality signal from the fire detector. In addition, since the deterioration abnormality of the fire detector is notified, it is possible to judge the progress of circuit deterioration from the decrease in internal voltage and current consumption during the test, and to notify deterioration abnormality before malfunction occurs. Also, by judging the deterioration abnormality on the fire detector side, the processing load on the disaster prevention receiver can be reduced.

（防災制御盤での劣化異常の判断による効果）
また、更に、火災検知器に接続されて火災を監視する防災受信盤を備え、異常判定部は防災受信盤に備えられ、火災検知器は、劣化異常を判定するための情報、例えば自器の回路ブロック毎の内部電圧又は消費電流の少なくとも何れか一方を測定して防災受信盤の異常判定部に送信し、異常判定部は、火災検知器から受信した情報、例えば回路ブロックの何れかの測定結果である内部電圧又は消費電流の少なくとも何れか一方に所定の低下又は消費電流に所定の増加が認められる場合に、劣化異常を判定し、防災受信盤は、異常判定部が劣化異常を判定した場合に、当該火災検知器の劣化異常を報知させるようにしたため、試験時の内部電圧や消費電流の低下から回路劣化の進み具合を判断して動作不良を起こす前に劣化異常を報知させることができ、また、火災検知器の劣化異常を防災受信盤で判断することにより、劣化が進んだ火災感知器では劣化判断が正常にできない問題を解消し、確実に火災検知器の劣化判断が可能となる。 (Effect of determination of deterioration abnormality in the disaster prevention control panel)
Further, a disaster prevention receiver connected to the fire detector to monitor fire is provided, the abnormality determination unit is provided in the disaster prevention receiver, and the fire detector receives information for determining deterioration abnormality, such as information of its own device. At least one of the internal voltage and current consumption of each circuit block is measured and transmitted to the abnormality determination section of the disaster prevention receiver panel, and the abnormality determination section measures the information received from the fire detector, for example, measuring any of the circuit blocks. When at least one of the internal voltage and the consumption current, which is the result, is found to have a predetermined decrease or a predetermined increase in the consumption current, a deterioration abnormality is determined, and the disaster prevention receiving panel determines that the deterioration abnormality has occurred. In this case, since the deterioration abnormality of the fire detector is notified, it is possible to determine the progress of circuit deterioration from the decrease in internal voltage and current consumption during the test, and to notify the deterioration abnormality before malfunction occurs. In addition, by judging abnormal deterioration of fire detectors with the disaster prevention receiver panel, it is possible to solve the problem that it is not possible to judge deterioration of fire detectors that have advanced deterioration, and it is possible to judge deterioration of fire detectors reliably. Become.

（外部の機器による劣化異常の報知による効果）
防災受信盤は、異常判定部が劣化異常を判定した場合に、外部の機器、例えば遠方監視制御設備から劣化異常を報知させるようにしたため、監視エリアに居なくとも監視エリアに配置された火災検出気の劣化異常を知ることができ、予備の火災検知器への交換作業等の対処を行うことができる。 (Effect of notification of deterioration abnormality by external device)
When the anomaly judgment unit judges a deterioration anomaly, the disaster prevention receiver panel notifies the deterioration anomaly from an external device, such as a remote monitoring and control facility. It is possible to know the deterioration abnormality of the fire, and to take countermeasures such as replacement work with a spare fire detector.

（火災検知器による劣化異常の表示による効果）
火災検知器は、異常判定部が劣化異常を判定した場合に劣化異常の表示を行う表示部を備えるようにしたため、予備の火災検知器への交換作業等の際に、劣化異常と判定された火災検出器が一見で分り、作業を効率よく行うことができる。 (Effect of display of deterioration abnormality by fire detector)
The fire detector is equipped with a display unit that displays a deterioration abnormality when the abnormality determination unit determines a deterioration abnormality. The fire detector can be seen at a glance, and the work can be done efficiently.

（劣化異常予告の効果）
また、異常判定部は、内部電圧又は消費電流の少なくとも何れか一方の低下又は消費電流の増加が劣化異常と判断するに至る前段階の所定範囲であると認められる場合に、劣化異常の予告を判定するようにしたため、劣化異常が判定される前に、劣化異常の予告が判定されることで、火災検知器の劣化の進み具合を継時的に判断でき、劣化異常が判定されるまでに、交換用の火災検知器を準備したり、交換作業の適切な予定を立てたりすることが可能となる。 (Effect of warning of deterioration abnormality)
Further, the abnormality determining unit notifies deterioration abnormality when it is recognized that the decrease in at least one of the internal voltage and the consumption current or the increase in the consumption current is within a predetermined range before determining deterioration abnormality. Since the deterioration abnormality is determined before the deterioration abnormality is determined, the progress of deterioration of the fire detector can be determined over time. , it will be possible to prepare a replacement fire detector and to make an appropriate schedule for the replacement work.

（閾値の設定変更による効果）
また、異常判定部の劣化異常及び又は劣化異常の予告と認める際の基準となる閾値は、所定の設定操作に基づき変更されるようにしたため、早めに劣化異常及び又は劣化異常の予告を判定したい場合は閾値を高い値に変更し、また、劣化異常及び又は劣化異常の予告の判定を遅らせたい場合は、閾値を低い値に変更するといった操作を、必要に応じて行うことを可能とする。 (Effect of changing the threshold setting)
In addition, since the threshold used as the reference for recognizing the deterioration abnormality and/or the deterioration abnormality notice of the abnormality determination unit is changed based on the predetermined setting operation, it is desired to determine the deterioration abnormality and/or the deterioration abnormality notice earlier. If necessary, the threshold is changed to a higher value, and the threshold is changed to a lower value if it is desired to delay the determination of the deterioration abnormality and/or the advance notice of the deterioration abnormality.

（電源部の電源電圧と電源電流の測定による効果）
また、火災検知器は、電源部から回路ブロック毎に出力される電源電圧又は電源電流の少なくとも何れか一方を、回路ブロック毎の内部電圧又は消費電流の少なくとも何れか一方として測定するようにしたため、火災検知器に設けている回路部の劣化度合を電源電圧と電源電流の変化から判断可能とする。 (Effect of measuring the power supply voltage and power supply current of the power supply)
In addition, since the fire detector measures at least one of the power supply voltage and the power supply current output from the power supply unit to each circuit block as at least one of the internal voltage and current consumption of each circuit block, To make it possible to determine the degree of deterioration of a circuit part provided in a fire detector from changes in power supply voltage and power supply current.

（検知器試験時の電源電圧と電源電流の測定による効果）
また、火災検知器は、検知器試験時に電源部から回路ブロック毎に出力される電源電圧又は電源電流の少なくとも何れか一方を、回路ブロック毎の内部電圧又は消費電流の少なくとも何れか一方として測定するようにしたため、回路ブロック毎に劣化度合を検知器試験時に判断可能とする。 (Effect of measurement of power supply voltage and power supply current during detector test)
In addition, the fire detector measures at least one of the power supply voltage and the power supply current output from the power supply unit to each circuit block during the detector test as at least one of the internal voltage and current consumption of each circuit block. Therefore, it is possible to determine the degree of deterioration for each circuit block during the detector test.

（試験開始信号による測定による効果）
また、火災検知器は、所定の操作又は所定周期毎に送信される試験開始信号を受信した場合に、自器の回路ブロック毎の内部電圧又は消費電流の少なくとも何れか一方を測定するようにしたため、感度試験と汚れ試験における火災炎の検出状態と同等な動作状態での内部電圧と消費電流を測定することができ、回路部の劣化度合をより正確に判断可能とする。 (Effect of measurement by test start signal)
In addition, the fire detector measures at least one of the internal voltage and current consumption for each circuit block of the fire detector when it receives a test start signal transmitted at predetermined intervals or at predetermined operations. , the internal voltage and current consumption can be measured in the same operating state as the flame detection state in the sensitivity test and contamination test, and the degree of deterioration of the circuit section can be determined more accurately.

（回路ブロック毎の平均電圧と平均電流の測定による効果）
また、火災検知器は、試験開始信号に基づく試験の実施中に、回路ブロック毎の内部電圧又は消費電流の少なくとも何れか一方を所定の周期毎に測定して平均電圧又は平均電流の少なくとも何れか一方を求めるようにしたため、試験中の内部電圧や消費電流の一時的な変化に影響されることなく、劣化度合をより正確に判断可能とする。 (Effect of measurement of average voltage and average current for each circuit block)
Also, the fire detector measures at least one of the internal voltage and current consumption of each circuit block at predetermined intervals during the test based on the test start signal, and measures at least one of the average voltage and average current. Since one of them is determined, the degree of deterioration can be determined more accurately without being affected by temporary changes in the internal voltage and current consumption during the test.

（劣化異常が判定された場合の火災判断による効果）
また、火災感知器は、隣接した火災検知器の検知範囲が重なるように配置されるとともに、機能構成部として、配置された状態で隣接する火災検知器の一方側を監視する第１の火災検知部と、他方側を監視する第２の火災検知部と、を備え、異常判定部は、第１の火災検知部の劣化異常と、第２の火災検知部の劣化異常と、を区別して劣化異常を判定し、所定の火災検知器で劣化異常が判定され、当該劣化異常が判定された火災検知器と検知範囲の重なる火災検知器に劣化異常を含む異常がない場合に、当該劣化異常が判定された火災検知器の火災検出結果を火災判断において採用しないようにしたため、正常な火災検出器のみで火災を監視することが可能となり、誤作動や非火災報を低減させることができる。 (Effect of fire judgment when deterioration abnormality is judged)
In addition, the fire detectors are arranged so that the detection ranges of the adjacent fire detectors overlap, and as a functional component, a first fire detection that monitors one side of the adjacent fire detectors in the arranged state and a second fire detection unit that monitors the other side, and the abnormality determination unit discriminates between the deterioration abnormality of the first fire detection unit and the deterioration abnormality of the second fire detection unit. Determining an abnormality, a deterioration abnormality is determined by a predetermined fire detector, and if there is no abnormality including deterioration abnormality in the fire detector that overlaps the detection range of the fire detector that has determined the deterioration abnormality, the deterioration abnormality is detected. Since the fire detection result of the judged fire detector is not used in the fire judgment, it is possible to monitor the fire only with a normal fire detector, and it is possible to reduce malfunctions and non-fire alarms.

（劣化異常の報知による効果）
また、劣化異常と特定された火災検知器の機能構成部を含めて劣化異常を報知するようにしたため、劣化異常と判定された箇所が火災検出器のどの機能構成部であるか知ることができ、劣化異常に対する処置を迅速に行うことができる。 (Effect of notification of deterioration abnormality)
In addition, since the deterioration abnormality is reported including the functional component of the fire detector identified as having the deterioration abnormality, it is possible to know which functional component of the fire detector is the portion determined to have the deterioration abnormality. , it is possible to quickly take measures against the deterioration abnormality.

（劣化状態の進行具合の判断、時系列情報、及び表示による効果）
また、異常判定部は、劣化状態の進行具合を判断可能な情報を提供する、劣化状態の進行具合に関する情報を時系列情報として記憶する、又は時系列情報を表示するようにしたため、火災検知器の劣化の進み具合を継時的に判断でき、劣化異常が判定されるまでに、交換用の火災検知器を準備したり、交換作業の適切な予定を立てたりすることが可能となる。 (Determination of progress of deterioration state, time-series information, and effect of display)
In addition, since the abnormality determination unit provides information that enables determination of the progress of the deterioration state, stores information regarding the progress of the deterioration state as time-series information, or displays the time-series information, the fire detector It is possible to determine the progress of deterioration of the fire detector over time, and prepare a replacement fire detector or make an appropriate schedule for replacement work before the deterioration abnormality is determined.

（検出感度異常の試験を利用した劣化異常判定の効果）
また、本発明の別形態にあっては、検知エリアの火災を検出する火災検知器を設けた防災システムであって、火災検知器の故障状態である故障異常に至る以前の劣化状態と認められる劣化異常を判定する異常判定部を備え、異常判定部は、火災検知器の受光センサによる光エネルギーの検出感度が所定レベルに低下する検出感度異常を判定する試験時に取得した検出感度異常を判定するための情報とは異なる劣化異常を判定するための情報に基づいて、劣化異常を判定するようにしたため、劣化異常のために専用の試験する必要はなく、感度試験や汚れ試験等の検出感度異常に関する試験に合わせて劣化異常を判定することでき、試験時間を短縮させることができる。 (Effect of deterioration abnormality determination using detection sensitivity abnormality test)
In another aspect of the present invention, a disaster prevention system is provided with a fire detector for detecting a fire in a detection area, and is recognized as a deteriorated state before reaching an abnormal failure, which is a failure state of the fire detector. An abnormality determination unit that determines a deterioration abnormality is provided, and the abnormality determination unit determines a detection sensitivity abnormality acquired during a test for determining a detection sensitivity abnormality in which the light energy detection sensitivity of the light receiving sensor of the fire detector drops to a predetermined level. Deterioration abnormality is judged based on the information for judging deterioration abnormality that is different from the information for detecting deterioration abnormality. Degradation abnormality can be determined in accordance with the test related to, and the test time can be shortened.

トンネル防災システムの概要を示した説明図Explanatory diagram showing the outline of the tunnel disaster prevention system 防災受信盤の機能構成の概略を示したブロック図Block diagram showing the outline of the functional configuration of the disaster prevention receiver 火災検知器の外観を示した説明図Explanatory diagram showing the exterior of the fire detector 火災検知器の機能構成の概略を示したブロック図Block diagram showing the outline of the functional configuration of the fire detector 防災受信盤の制御動作を示したフローチャートFlowchart showing the control operation of the disaster prevention receiver 火災検知器の制御動作を示したフローチャートFlowchart showing the control operation of the fire detector

［トンネル防災システムの概要］
図１はトンネル防災システム概要を示した説明図である。図１に示すように、自動車専用道路のトンネルとして、上り線トンネル１ａと下り線トンネル１ｂが構築されている。 [Overview of Tunnel Disaster Prevention System]
FIG. 1 is an explanatory diagram showing the outline of the tunnel disaster prevention system. As shown in FIG. 1, an up-line tunnel 1a and a down-line tunnel 1b are constructed as tunnels of a motorway.

上り線トンネル１ａと下り線トンネル１ｂの内部には、トンネル長手方向の壁面に沿って例えば２５メートル又は５０メートル間隔で火災検知器１２が設置されている。火災検知器１２は２組の火災検知部を備えることでトンネル長手方向上り側および下り側の両方向に検知エリアを持ち、トンネルの長手方向に沿って、隣接して配置される火災検知器との検知エリアが相互補完的に重なるように連続的に配置し、検知エリア内で起きた火災による炎からの放射線、例えば赤外線を観測して火災を検知する。 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 walls in the longitudinal direction of the tunnels. The fire detector 12 has two sets of fire detection units so that it has detection areas on both the upward and downward sides in the longitudinal direction of the tunnel. The detection areas are arranged continuously so that they complement each other, and the radiation from the flames caused by the fire occurring in the detection area, such as infrared rays, is observed to detect the fire.

また、上り線トンネル１ａと下り線トンネル１ｂには、非常用施設として、火災通報のために手動通報装置や非常電話が設けられ、火災の消火や延焼防止のために消火栓装置が設けられ、更にトンネル躯体やダクト内を火災から防護するために水噴霧ヘッドから消火用水を散水させる水噴霧などが設置されるが、図示を省略されている。 In addition, in the inbound line tunnel 1a and the outbound line tunnel 1b, as emergency facilities, a manual reporting device and an emergency telephone are provided for fire reporting, and a fire hydrant device is provided for extinguishing the fire and preventing the spread of the fire. In order to protect the inside of the tunnel frame and ducts from fire, a water spray for spraying fire extinguishing water from a water spray head is installed, but illustration is omitted.

防災受信盤１０からは上り線トンネル１ａと下り線トンネル１ｂに対し電源回線を含む伝送路１４ａ，１４ｂを引き出して火災検知器１２を接続しており、火災検知器１２には回線単位に固有のアドレスを設定されている。 Transmission lines 14a and 14b including power supply lines are led out from the disaster prevention receiving panel 10 to the up line tunnel 1a and the down line tunnel 1b, and the fire detectors 12 are connected. address is set.

また、防災受信盤１０に対しては、消火ポンプ設備１６、ダクト用の冷却ポンプ設備１８、ＩＧ子局設備２０、換気設備２２、警報表示板設備２４、ラジオ再放送設備２６、テレビ監視設備２８及び照明設備３０等を設けており、ＩＧ子局設備２０をデータ伝送回線で接続する点を除き、それ以外の設備はＰ型信号回線により防災受信盤１０に個別に接続されている。ここで、ＩＧ子局設備２０は、防災受信盤１０と外部に設けた上位設備である遠方監視制御設備３２とをネットワークを経由して結ぶ通信設備である。 In addition, for the disaster prevention receiving panel 10, fire pump equipment 16, duct cooling pump equipment 18, IG slave station equipment 20, ventilation equipment 22, alarm display board equipment 24, radio rebroadcast equipment 26, television monitoring equipment 28 , lighting equipment 30, etc., and except that the IG slave station equipment 20 is connected by a data transmission line, other equipment is individually connected to the disaster prevention receiving panel 10 by a P-type signal line. Here, the IG slave station equipment 20 is communication equipment that connects the disaster prevention receiving panel 10 and a remote monitoring control equipment 32, which is an externally provided upper equipment, via a network.

換気設備２２は、トンネル内の天井側に設置されているジェットファンの運転による高い吹き出し風速によってトンネル内の空気にエネルギーを与えて、トンネル長手方向に換気の流れを起こす設備である。 The ventilation equipment 22 is equipment that gives energy to the air in the tunnel by means of a high blowing wind speed generated by the operation of a jet fan installed on the ceiling side of the tunnel, thereby generating a ventilation flow in the longitudinal direction of the tunnel.

警報表示板設備２４は、トンネル内の利用者に対して、トンネル内の異常を、電光表示板に表示して知らせる設備である。ラジオ再放送設備２６は、トンネル内で運転者等が道路管理者からの情報を受信できるようにするための設備である。テレビ監視設備２８は、火災の規模や位置を確認したり、水噴霧設備の作動、避難誘導を行う場合のトンネル内の状況を把握するための設備である。照明設備３０はトンネル内の照明機器を駆動して管理する設備である。 The alarm display board facility 24 is a facility for notifying users in the tunnel of an abnormality in the tunnel by displaying it on an electric display board. The radio rebroadcast facility 26 is a facility for enabling drivers and others to receive information from road administrators in tunnels. The television monitoring equipment 28 is equipment for checking the scale and position of the fire, operating the water spray equipment, and grasping the situation inside the tunnel when conducting evacuation guidance. The lighting equipment 30 is equipment for driving and managing the lighting equipment in the tunnel.

［防災受信盤］
図２は防災受信盤の機能構成の概略を示したブロック図である。図２に示すように、防災受信盤１０は盤制御部３４を備え、盤制御部３４は例えばプログラムの実行により実現される機能であり、ハードウェアとしてはＣＰＵ、メモリ、各種の入出力ポート等を備えたコンピュータ回路等を使用する。 [Disaster prevention receiver]
FIG. 2 is a block diagram showing an outline of the functional configuration of the disaster prevention receiving panel. As shown in FIG. 2, the disaster prevention receiver panel 10 includes a panel control section 34, which is a function realized by executing a program, for example, and includes hardware such as a CPU, memory, and various input/output ports. using a computer circuit or the like with

盤制御部３４に対しては伝送部３６ａ，３６ｂを設け、伝送部３６ａ，３６ｂから引き出した伝送路１４ａ，１４ｂに上り線トンネル１ａと下り線トンネル１ｂに設置した火災検知器１２をそれぞれ複数台接続されている。 Transmission units 36a and 36b are provided for the panel control unit 34, and transmission lines 14a and 14b drawn from the transmission units 36a and 36b are provided with a plurality of fire detectors 12 installed in the up line tunnel 1a and the down line tunnel 1b, respectively. It is connected.

また、盤制御部３４に対しスピーカ、警報表示灯等を備えた警報部３８、液晶ディスプレイ、プリンタ等を備えた表示部４０、各種スイッチ等を備えた操作部４２、外部監視設備と通信するＩＧ子局設備２０を接続するモデム４４を設け、更に、図１に示した消火ポンプ設備１６、冷却ポンプ設備１８、換気設備２２、警報表示板設備２４、ラジオ再放送設備２６、テレビ監視設備２８及び照明設備３０が接続されたＩＯ部４６を設けている。 In addition, for the panel control unit 34, an alarm unit 38 equipped with a speaker, an alarm indicator lamp, etc., a display unit 40 equipped with a liquid crystal display, a printer, etc., an operation unit 42 equipped with various switches, etc., and an IG for communicating with external monitoring equipment A modem 44 for connecting the slave station equipment 20 is provided, and the fire pump equipment 16, cooling pump equipment 18, ventilation equipment 22, alarm display board equipment 24, radio rebroadcast equipment 26, television monitoring equipment 28 and An IO section 46 to which the lighting equipment 30 is connected is provided.

盤制御部３４は、伝送部３６ａ，３６ｂに指示して火災検知器１２のアドレスを順次指定したポーリングコマンドを含む呼出信号を繰り返し送信しており、火災検知器１２は自己アドレスに一致する呼出信号を受信すると、火災検知や試験結果等の自己の状態情報を含む応答信号を返信する。 The panel control unit 34 instructs the transmission units 36a and 36b to repeatedly transmit a call signal including a polling command sequentially specifying the addresses of the fire detectors 12, and the fire detectors 12 generate call signals matching their own addresses. , it returns a response signal containing its own status information such as fire detection and test results.

また、防災受信盤１０の盤制御部３４は、火災検知器１２からの応答信号の受信により火災を検知した場合は警報部３８により火災警報を出力させると共にＩＯ部４６を介し他設備の連動制御を指示する制御を行う。 In addition, when a fire is detected by receiving a response signal from the fire detector 12, the board control unit 34 of the disaster prevention receiving board 10 causes the alarm unit 38 to output a fire alarm and interlocking control of other equipment via the IO unit 46. perform control to instruct

また、盤制御部３４は、システムの立上げ時あるいは運用中の所定の周期毎に、火災検知器１２のアドレスを順次指定した試験指示コマンドを設定した試験信号を送信し、火災検知器１２に感度試験、汚れ試験及び劣化試験を行わせ、それぞれの試験結果を応答させる制御を行う。また、操作部４２により特定の火災検知器１２のアドレスを指定した試験操作により、個別の火災検知器に対し試験信号を送信して試験を行わせることもできる。 Further, the panel control unit 34 transmits a test signal in which a test instruction command sequentially specifying the addresses of the fire detectors 12 is set at the time of system start-up or at predetermined intervals during operation, and the fire detectors 12 Sensitivity test, contamination test and deterioration test are performed, and control is performed to respond with each test result. Further, by performing a test operation in which the address of a specific fire detector 12 is designated by the operation unit 42, a test signal can be transmitted to an individual fire detector to perform a test.

また、盤制御部３４は火災検知器１２の感度試験により得られた感度異常予告の応答信号を受信した場合、火災検知器のアドレスを特定した感度異常の予告警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させる制御を行う。 Further, when the board control unit 34 receives a sensitivity abnormality notice response signal obtained by the sensitivity test of the fire detector 12, the sensitivity abnormality notice warning with the specified address of the fire detector is issued by the display unit 40 with an alarm sound. Controls to notify by display and printing.

また、盤制御部３４は火災検知器１２の感度試験により得られたセンサ故障の応答信号を受信した場合、火災検知器のアドレスを特定したセンサ故障警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させる制御を行う。 Further, when the board control unit 34 receives a sensor failure response signal obtained by the sensitivity test of the fire detector 12, the sensor failure alarm specifying the address of the fire detector is displayed on the display unit 40 with an alarm sound, display, Control to notify by printing.

また、盤制御部３４は火災検知器１２の汚れ試験により得られた汚れ異常予告信号を受信した場合、火災検知器のアドレスを特定した汚れ異常の予告警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させる制御を行う。 When the panel control unit 34 receives a contamination anomaly notice signal obtained by the contamination test of the fire detector 12, the contamination anomaly notice alarm specifying the address of the fire detector is displayed on the display unit 40 with an alarm sound and display. , control to notify by printing.

また、盤制御部３４は火災検知器１２の汚れ試験により得られた汚れ異常の応答信号を受信した場合、火災検知器のアドレスを特定した汚れ警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させる制御を行う。 Further, when the panel control unit 34 receives a response signal indicating abnormal contamination obtained by the contamination test of the fire detector 12, the contamination alarm specifying the address of the fire detector is generated by the display unit 40 with an alarm sound, display, or printout. Control to notify by.

また、盤制御部３４は火災検知器１２の劣化試験により得られた劣化異常予告の応答信号を受信した場合、火災検知器のアドレスを特定した劣化異常の予告警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させる制御を行う。 Further, when the board control unit 34 receives a deterioration anomaly notice response signal obtained by a deterioration test of the fire detector 12, the deterioration anomaly notice alarm with the specified address of the fire detector is issued by the display unit 40 with an alarm sound. Controls to notify by display and printing.

また、盤制御部３４は火災検知器１２の劣化試験により得られた劣化異常の応答信号を受信した場合、火災検知器のアドレスを特定した劣化異常警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させる制御を行う。 Further, when the board control unit 34 receives a deterioration abnormality response signal obtained by the deterioration test of the fire detector 12, the deterioration abnormality alarm specifying the address of the fire detector is displayed on the display unit 40 with an alarm sound, display, Control to notify by printing.

また、盤制御部３４は、火災検知器１２の感度試験、汚れ試験及び劣化試験により得られた予告、故障、又は異常の応答信号を受信した場合、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に送信し、予告警報、故障警報又は異常警報を報知させる制御を行う。 In addition, when the board control unit 34 receives a notice, failure, or abnormal response signal obtained from the sensitivity test, contamination test, and deterioration test of the fire detector 12, the IG slave station shown in FIG. It is transmitted to the remote monitoring and control equipment 32 via the equipment 20, and performs control to issue an advance warning, a failure alarm, or an abnormal alarm.

更に、盤制御部３４は、表示部４０のディスプレイを利用した操作部４２の操作に基づき、火災検知器１２に設定されている感度異常、汚れ異常、劣化異常を判断するための閾値や、感度異常、汚れ異常、劣化異常の予告を判断する予告閾値を変更させる制御を行う。この閾値及び予告閾値を変更させる制御は、火災検知器１２の閾値又は予告閾値を一斉に変更させることもできるし、アドレスを指定して特定の火災検知器１２の閾値又は予告閾値を変更させることもできる。 Furthermore, the board control unit 34 uses the display of the display unit 40 to operate the operation unit 42, and the threshold value for determining the sensitivity abnormality, the dirt abnormality, and the deterioration abnormality set in the fire detector 12, and the sensitivity Control is performed to change the notice threshold for judging the notice of anomaly, contamination anomaly, and deterioration anomaly. This control for changing the threshold value and the notice threshold value can change the threshold value or the notice threshold value of the fire detectors 12 all at once, or change the threshold value or the notice threshold value of a specific fire detector 12 by specifying an address. can also

以下の説明では、伝送路１４ａ，１４ｂ及び伝送部３６ａ，３６ｂについて、区別する必要がない場合は伝送路１４及び伝送部３６という場合がある。 In the following description, the transmission lines 14a and 14b and the transmission units 36a and 36b may be referred to as the transmission line 14 and the transmission unit 36 when there is no need to distinguish them.

［火災検知器］
（火災検知器の外観）
図３は火災検知器の外観を示した説明図、図４は火災検知器の機能構成の概略を示したブロック図である。 [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.

図３に示すように、火災検知器１２は、筐体４９の上部に設けられたセンサ収納部５１に左右に分けて２組の透光性窓５０Ｒ，５０Ｌが設けられ、透光性窓５０Ｒ，５０Ｌ内の各々に、センサ部が配置されている。また、透光性窓５０Ｒ，５０Ｌの近傍の、センサ部を見通せる位置に、透光性窓５０Ｒ，５０Ｌの汚れ試験に使用される外部試験光源を収納した２組の試験光源用透光窓５２Ｒ，５２Ｌが設けられている。 As shown in FIG. 3, the fire detector 12 is provided with two sets of translucent windows 50R and 50L divided into left and right in a sensor housing portion 51 provided at the top of a housing 49. The translucent windows 50R , 50L, a sensor unit is arranged. In addition, two sets of test light source translucent windows 52R each containing an external test light source used for the contamination test of the translucent windows 50R and 50L at positions near the translucent windows 50R and 50L where the sensor section can be seen. , 52L are provided.

以下の説明では、透光性窓５０Ｒを右眼透光性窓５０Ｒといい、透光性窓５０Ｌを左眼透光性窓５０Ｌという場合がある。 In the following description, the translucent window 50R may be called the right-eye translucent window 50R, and the translucent window 50L may be called the left-eye translucent window 50L.

（火災検知器の概略構成）
図４に示すように、火災検知器１２には、検知器制御部５４、伝送部５６、電源部５８、左右２組の火災検知部６０Ｒ，６０Ｌ、試験発光駆動部７２、感度試験に用いられる内部試験光源７４Ｒ，７５Ｒと内部試験光源７４Ｌ，７５Ｌ、汚れ試験に用いられる外部試験光源７６Ｒ，７６Ｌが設けられている。以下の説明では、火災検知部６０Ｒを右眼火災検知部６０Ｒといい、火災検知部６０Ｌを左眼火災検知部６０Ｌという場合がある。 (Schematic configuration of fire detector)
As shown in FIG. 4, the fire detector 12 includes a detector control section 54, a transmission section 56, a power supply section 58, two pairs of left and right fire detection sections 60R and 60L, a test light emission drive section 72, and a sensitivity test. Internal test light sources 74R, 75R, internal test light sources 74L, 75L, and external test light sources 76R, 76L used for soil testing are provided. In the following description, the fire detection section 60R may be called the right eye fire detection section 60R, and the fire detection section 60L may be called the left eye fire detection section 60L.

検知器制御部５４は、例えばプログラムの実行により実現される機能であり、ハードウェアとしてはＣＰＵ、メモリ、各種の入出力ポート等を備えたコンピュータ回路等を使用する。 The detector control unit 54 is a function realized by executing a program, for example, and uses a computer circuit or the like having a CPU, a memory, various input/output ports, etc. as hardware.

伝送部５６は伝送路１４のシリアル伝送線Ｓとシリアル伝送コモン線ＳＣにより図２に示した防災受信盤１０の伝送部３６に接続され、各種信号をシリアル伝送により送受信する。 The transmission unit 56 is connected to the transmission unit 36 of the disaster prevention receiving panel 10 shown in FIG. 2 by the serial transmission line S and the serial transmission common line SC of the transmission line 14, and transmits and receives various signals by serial transmission.

電源部５８は伝送路１４に含まれる電源線Ｂと電源コモン線ＢＣにより図２に示した防災受信盤１０から電源供給を受け、例えば検知器制御部５４、伝送部５６、左右２組の火災検知部６０Ｒ，６０Ｌ、試験発光駆動部７２となる回路ブロックに分けて、所定の電源電圧Ｖｃｃ１～Ｖｃｃ５が供給されている。 The power supply unit 58 receives power supply from the disaster prevention receiving panel 10 shown in FIG. Predetermined power supply voltages Vcc1 to Vcc5 are supplied to the detection units 60R and 60L and the test light emission driving unit 72, which are divided into circuit blocks.

ここで、電源電圧Ｖｃｃ１は伝送部５６に供給され、電源電圧Ｖｃｃ２は検知器制御部５４に供給され、電源電圧Ｖｃｃ３は火災検知部６０Ｒに供給され、電源電圧Ｖｃｃ４は火災検知部６０Ｌに供給され、電源電圧Ｖｃｃ５は試験発光駆動部７２に供給されている。 Here, the power supply voltage Vcc1 is supplied to the transmission unit 56, the power supply voltage Vcc2 is supplied to the detector control unit 54, the power supply voltage Vcc3 is supplied to the fire detection unit 60R, and the power supply voltage Vcc4 is supplied to the fire detection unit 60L. , and the power supply voltage Vcc5 are supplied to the test light emission driving section 72 .

電源部５８から各回路ブロックに対する電源ラインには、電圧電流検出部７８が個別に設けられ、各回路ブロックに対する電源電圧と消費電流を検出して検知器制御部５４に出力されている。電圧電流検出部７８は、電圧の検出は電源ラインの電圧を直接取出し、電流の検出は電流検出用の低抵抗を電源ラインに挿入接続して、その両端の電圧を電流検出電圧として取り出している。 Voltage and current detectors 78 are individually provided on power supply lines from the power supply unit 58 to each circuit block, and detect the power supply voltage and current consumption for each circuit block and output them to the detector control unit 54 . The voltage/current detector 78 directly extracts the voltage of the power supply line for voltage detection, and inserts and connects a low resistance for current detection into the power supply line for current detection, and extracts the voltage across the resistor as the current detection voltage. .

試験発光駆動部７２には、感度試験に使用する内部試験光源７４Ｒ，７５Ｒ，７４Ｌ，７５Ｌが接続されまた、汚れ試験に使用する外部試験光源７６Ｒ，７６Ｌが接続され、それぞれ発光素子としてＬＥＤを設けている。 Internal test light sources 74R, 75R, 74L, and 75L used for sensitivity tests are connected to the test light emission drive unit 72, and external test light sources 76R and 76L used for contamination tests are connected, each of which is provided with an LED as a light emitting element. ing.

（火災検知部）
火災検知部６０Ｒ，６０Ｌは、センサ部６４，６８と増幅処理部６６，７０を備える。例えば右眼火災検知部６０Ｒを例にとると、センサ部６４，６８の前面には検知器カバーに設けた右眼透光性窓５０Ｒが配置されており、右眼透光性窓５０Ｒを介して外部の検知エリアからの光エネルギーがセンサ部６４，６８に入射されている。 (Fire detector)
The fire detection units 60R and 60L include sensor units 64 and 68 and amplification processing units 66 and 70, respectively. Taking the right-eye fire detection unit 60R as an example, a right-eye translucent window 50R provided in the detector cover is arranged in front of the sensor units 64 and 68. Optical energy from an external detection area is incident on the sensor portions 64 and 68 .

右眼火災検知部６０Ｒは、例えば２波長式の炎検知により火災を監視している。センサ部６４は、右眼透光性窓５０Ｒを介して入射した光エネルギーの中から、炎に特有なＣＯ2の共鳴放射帯である４．４～４．５μｍの放射線を光学波長バンドパスフィルタにより選択透過（通過）させて、受光センサにより該放射線のエネルギーを検知して光電変換したうえで、増幅処理部６６により増幅等所定の加工を施してエネルギー量に対応する受光信号にして検知器制御部５４へ出力する。 The right eye fire detection unit 60R monitors fire by, for example, two-wavelength flame detection. The sensor unit 64 detects radiation of 4.4 to 4.5 μm, which is the resonance radiation band of CO2 peculiar to flame, from the light energy incident through the right-eye translucent window 50R through an optical wavelength bandpass filter. It is selectively transmitted (passed through), the energy of the radiation is detected by the light receiving sensor, photoelectrically converted, and then subjected to predetermined processing such as amplification by the amplification processing unit 66 to generate a received light signal corresponding to the amount of energy, which is controlled by the detector. Output to unit 54 .

センサ部６８は、左眼透光性窓５０Ｌを介して入射した光エネルギーの中から、５～６μｍの放射エネルギーを光学波長バンドパスフィルタにより選択透過（通過）させて、受光センサにより該放射線のエネルギーを検知して光電変換したうえで、増幅処理部７０により増幅等所定の加工を施してエネルギー量に対応する受光信号にして検知器制御部５４へ出力する。 The sensor unit 68 selectively transmits (passes) radiant energy of 5 to 6 μm from the light energy incident through the left-eye translucent window 50L with an optical wavelength bandpass filter, and detects the radiation with a light receiving sensor. After the energy is detected and photoelectrically converted, the signal is subjected to predetermined processing such as amplification by the amplification processing unit 70 to generate a light receiving signal corresponding to the amount of energy and output to the detector control unit 54 .

増幅処理部６６，７０には、プリアンプ、炎のゆらぎ周波数帯域を通過させるフィルタ及びパワーアンプ等が設けられている。 The amplification processing units 66 and 70 are provided with a preamplifier, a filter for passing the flame fluctuation frequency band, a power amplifier, and the like.

（火災判断）
検知器制御部５４には、プログラムの実行により実現される機能として、火災判断部８０の機能が設けられている。火災判断部８０は、例えば、右眼火災検知部６０Ｒの増幅処理部６６，７０から出力された受光値（受光信号レベル）の相対比をとり、所定の閾値と比較することにより炎の有無を判定し、炎有りの判定により火災を検知した場合には、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に火災検知情報を設定して防災受信盤１０へ送信させる制御を行う。 (fire judgment)
The detector control section 54 is provided with the function of the fire determination section 80 as a function realized by executing the program. For example, the fire determination unit 80 determines the presence or absence of a flame by taking the relative ratio of the light reception values (light reception signal levels) output from the amplification processing units 66 and 70 of the right eye fire detection unit 60R and comparing it with a predetermined threshold value. If a fire is detected by judging that there is a flame, the transmission unit 56 is instructed to set fire detection information in the response signal to the call signal matching the own address and transmit it to the disaster prevention receiver panel 10. I do.

（感度試験）
検知器制御部５４には、プログラムの実行により実現される機能として、感度試験部８２の機能が設けられている。感度試験部８２は、伝送部５６を介して防災受信盤１０から自身のアドレスを指定した試験信号を受信した場合に動作し、試験発光駆動部７２に指示して、内部試験光源７４Ｒ，７５Ｒ，７４Ｌ，７５Ｌを順番に発光駆動して火災検知部６０Ｒ，６０Ｌの感度試験を行わせる。 (Sensitivity test)
The detector control section 54 is provided with the function of the sensitivity test section 82 as a function realized by executing the program. The sensitivity test section 82 operates when it receives a test signal designating its own address from the disaster prevention receiver board 10 via the transmission section 56, and instructs the test light emission driving section 72 to 74L and 75L are driven to emit light in order to perform the sensitivity test of the fire detection units 60R and 60L.

例えば右眼火災検知部６０Ｒにおけるセンサ部６４と増幅処理部６６の回路系統の感度試験を例にとると、試験発光駆動部７２は内部試験光源７４Ｒ，７５Ｒを発光駆動することにより、火災炎に相当する炎疑似光をセンサ部６４に入射させる。内部試験光源７４Ｒからの炎疑似光は、センサ部６４で受光する炎に固有な４．４～４．５μｍ及びセンサ部６８で受光する５～６μｍの放射エネルギーを含み、且つ、炎に固有な８～１２Ｈｚのゆらぎ周波数をもつ光とされている。 For example, taking the sensitivity test of the circuit system of the sensor unit 64 and the amplification processing unit 66 in the right eye fire detection unit 60R, the test light emission drive unit 72 drives the internal test light sources 74R and 75R to emit light, thereby causing fire to occur. Corresponding flame-like light is made incident on the sensor section 64 . The flame simulating light from the internal test light source 74R includes radiant energy of 4.4 to 4.5 μm specific to the flame received by the sensor section 64 and 5 to 6 μm radiant energy received by the sensor section 68, and is specific to the flame. The light has a fluctuation frequency of 8 to 12 Hz.

感度試験部８２は、センサ部６４と増幅処理部６６の回路ブロック、センサ部６８と増幅処理部７０の回路ブロック毎に感度試験を行う。 The sensitivity test section 82 performs a sensitivity test for each of the circuit blocks of the sensor section 64 and the amplification processing section 66 and the circuit blocks of the sensor section 68 and the amplification processing section 70 .

例えば、センサ部６４と増幅処理部６６の回路ブロックの感度試験は、工場出荷時に初期設定された基準受光値がメモリに記憶されており、システム立上げ時の感度試験で得られる検出受光値は基準受光値に一致しており、検出受光値を基準受光値で割った検出感度は１となっている。運用期間が経過していくと、検出受光値は徐々に低下し、検出感度は０．９，０．８，０．７・・・というように低下していく。 For example, in the sensitivity test of the circuit blocks of the sensor section 64 and the amplification processing section 66, the reference received light value initially set at the time of shipment from the factory is stored in the memory, and the detected received light value obtained in the sensitivity test at system start-up is It matches the reference light reception value, and the detection sensitivity obtained by dividing the detected light reception value by the reference light reception value is 1. As the operating period elapses, the detected received light value gradually decreases, and the detection sensitivity decreases to 0.9, 0.8, 0.7, and so on.

このように検出感度が１以下に低下した場合、感度試験部８２は感度試験により検出感度を求めると共に、検出感度の逆数となる補正値を求めてメモリに記憶させ、その後の運用状態で検出される受光値に補正値を乗算して感度補正を行い、火災判断部８０は感度補正された受光値により火災を判断する。 When the detection sensitivity decreases to 1 or less in this way, the sensitivity test unit 82 obtains the detection sensitivity by the sensitivity test, obtains a correction value that is the reciprocal of the detection sensitivity, stores it in the memory, and detects it in the subsequent operation state. The received light value is multiplied by the correction value to perform sensitivity correction, and the fire judgment unit 80 judges a fire based on the sensitivity-corrected light reception value.

また、感度試験部８２には、感度補正が不可能となる限界に対応した感度閾値、例えば感度閾値０．５が予め設定されており、感度試験で求められた検出感度が感度閾値以下又は感度閾値を下回った場合にセンサ部６４の感度異常による故障と判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号にセンサ故障情報を設定して防災受信盤１０へ送信させる制御を行う。なお、センサ故障の判断を確実なものとするため、感度試験部８２は複数回連続して感度異常による故障と判断した場合に、センサ故障を設定した応答信号を送信させても良い。 Further, the sensitivity test unit 82 is preset with a sensitivity threshold corresponding to the limit at which sensitivity correction is impossible, for example, a sensitivity threshold of 0.5. If it falls below the threshold, it is determined that the sensor unit 64 has failed due to sensitivity abnormality, and the transmission unit 56 is instructed to set the sensor failure information in the response signal to the call signal that matches the own address and transmit it to the disaster prevention receiving panel 10. control to allow In addition, in order to make the determination of the sensor failure reliable, the sensitivity test section 82 may transmit a response signal setting the sensor failure when it is determined that the failure is due to sensitivity abnormality a plurality of times in succession.

また、感度試験部８２には、感度閾値より大きい所定の感度異常の予告閾値、例えば予告閾値０．６が予め設定されており、感度試験で求められた検出感度が感度異常の予告閾値以下又は感度異常の予告閾値を下回った場合にセンサ部６４の感度異常による故障が近いと判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に感度異常の予告情報を設定して防災受信盤１０へ送信させる制御を行う。 Further, the sensitivity test unit 82 is preset with a predetermined sensitivity abnormality warning threshold larger than the sensitivity threshold, for example, a warning threshold of 0.6. If it falls below the notice threshold of sensitivity abnormality, it is determined that a failure due to sensitivity abnormality of the sensor section 64 is imminent, and instructs the transmission section 56 to set the sensitivity abnormality notice information in the response signal to the calling signal that matches the own address. and control to transmit to the disaster prevention receiving board 10.

左眼火災検知部６０Ｌにおけるセンサ部６８と増幅処理部７０の回路系統の感度試験についても、試験発光駆動部７２により内部試験光源７４Ｌ，７５Ｌを発光駆動することにより、同様にして感度試験が行われる。 The sensitivity test of the circuit system of the sensor unit 68 and the amplification processing unit 70 in the left eye fire detection unit 60L is performed in the same manner by driving the internal test light sources 74L and 75L to emit light by the test light emission drive unit 72. will be

（汚れ試験）
検知器制御部５４には、プログラムの実行により実現される機能として、汚れ試験部８４の機能が設けられている。汚れ試験部８４は、伝送部５６を介して防災受信盤１０から自身のアドレスを指定した試験信号を受信した場合に動作し、試験発光駆動部７２に指示して、外部試験光源７６Ｒ，７６Ｌを順番に発光駆動して透光性窓５０Ｒ，５０Ｌの汚れ試験を行わせる。 (dirt test)
The detector control section 54 is provided with the function of the contamination test section 84 as a function realized by executing the program. The contamination test section 84 operates when it receives a test signal designating its own address from the disaster prevention receiver board 10 via the transmission section 56, and instructs the test light emission driving section 72 to turn on the external test light sources 76R and 76L. The contamination test of the translucent windows 50R and 50L is performed by sequentially emitting light.

例えば透光性窓５０Ｒの汚れ試験を例にとると、試験発光駆動部７２は外部試験光源７６Ｒを発光駆動することにより、火災炎に相当する炎疑似光を、透光性窓５０Ｒを介してセンサ部６４に入射させる。外部試験光源７６Ｒからの炎疑似光は、センサ部６４で受光する炎に固有な４．４～４．５μｍ及びセンサ部６８で受光する５～６μｍの放射エネルギーを含み、且つ、炎に固有な８～１２Ｈｚのゆらぎ周波数をもつ光とされている。 For example, taking a contamination test on the translucent window 50R, the test light emission drive unit 72 drives the external test light source 76R to emit a flame imitation light corresponding to a fire flame through the translucent window 50R. The light is caused to enter the sensor section 64 . The flame-like light from the external test light source 76R includes radiant energy of 4.4-4.5 μm specific to the flame received by the sensor section 64 and 5-6 μm radiant energy received by the sensor section 68, and is specific to the flame. The light has a fluctuation frequency of 8 to 12 Hz.

透光性窓５０Ｒは工場出荷時に汚れはなく、その際に汚れ試験で得られた受光値が基準受光値としてメモリに記憶されており、減光率の演算に利用される。 The translucent window 50R is free from contamination at the time of shipment from the factory, and the received light value obtained in the contamination test at that time is stored in the memory as a reference received light value, and is used to calculate the light attenuation rate.

システム立上げ時の汚れ試験で得られる検出受光値は基準受光値に一致しており、基準受光値から検出受光値を減算した値を基準受光値で割った減光率は０となっている。運用期間が経過していくと、透光性窓５０Ｒに汚れが付着し、減光率は、０．１，０．２，０．３・・・というように徐々に増加していく。 The detected light reception value obtained in the contamination test at the time of system startup matches the reference light reception value, and the light reduction rate obtained by dividing the value obtained by subtracting the detected light reception value from the reference light reception value by the reference light reception value is 0. . As the operating period elapses, dirt adheres to the translucent window 50R, and the light attenuation rate gradually increases to 0.1, 0.2, 0.3, and so on.

このように減光率が増加した場合、汚れ試験部８４は汚れ試験により減光率を求めると共に、（１－減光率）の逆数となる補正値を求めてメモリに記憶させ、その後の運用状態で検出される受光値（感度試験の補正値により補正された受光値）を補正値により除算して汚れ補正を行い、火災判断部８０は汚れ補正された受光値により火災を判断する。なお、運用状態で検出される受光値は、前述した感度試験で得られた補正値および汚れ試験で得られた補正値で補正されることになる。 When the light attenuation rate increases in this way, the contamination test unit 84 obtains the light attenuation rate by the contamination test and also obtains a correction value that is the reciprocal of (1-light attenuation rate) and stores it in the memory for subsequent operation. Dirt correction is performed by dividing the light reception value detected in the state (light reception value corrected by the correction value of the sensitivity test) by the correction value, and the fire judgment unit 80 judges a fire from the dirt-corrected light reception value. The received light value detected in the operating state is corrected by the correction value obtained in the sensitivity test and the correction value obtained in the contamination test.

また、汚れ試験部８４には、汚れ補正が不可能となる限界に対応した減光率となる汚れ閾値、例えば汚れ閾値０．５が予め設定されており、汚れ試験で求められた減光率が汚れ閾値以上又は汚れ閾値を上回った場合に透光性窓５０Ｒの汚れ補正が不可能となる汚れ異常と判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に汚れ異常情報を設定して防災受信盤１０へ送信させる制御を行う。 Further, in the contamination test section 84, a contamination threshold that is a light attenuation rate corresponding to the limit at which contamination correction is impossible, for example, a contamination threshold of 0.5, is set in advance. is greater than or equal to the contamination threshold value or exceeds the contamination threshold value, it is determined that the translucent window 50R is in an abnormal contamination state, and instructs the transmission unit 56 to respond to the call signal matching the own address. Control is performed to set dirt abnormality information and transmit it to the disaster prevention receiving panel 10 .

また、感度試験部８２には、汚れ閾値より小さい所定の汚れ予告閾値、例えば汚れ予告閾値０．４が予め設定されており、汚れ試験で求められた減光率が汚れ予告閾値以上又は汚れ予告閾値を上回った場合に汚れ異常が近いと判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に汚れ異常の予告情報を設定して防災受信盤１０へ送信させる制御を行う。 Further, the sensitivity test unit 82 is preset with a predetermined dirt warning threshold value smaller than the dirt threshold value, for example, a dirt warning threshold value of 0.4. When the threshold value is exceeded, it is judged that the contamination abnormality is near, and the transmission unit 56 is instructed to set the contamination abnormality notice information in the response signal to the call signal matching the own address and transmit it to the disaster prevention receiving panel 10. I do.

（劣化試験）
検知器制御部５４には、プログラムの実行により実現される機能として、劣化試験部８６の機能が設けられている。 (Deterioration test)
The detector control section 54 is provided with the function of the deterioration test section 86 as a function realized by executing the program.

劣化試験部８６は、伝送部５６を介して防災受信盤１０から自身のアドレスを指定した試験信号を受信して感度試験部８２と汚れ試験部８４が順次動作して感度試験と汚れ試験を行った場合、各回路ブロックへの電源ラインに設けられた電圧電流検出部７８により検出されている試験中の電源電圧Ｖｃｃ１～Ｖｃｃ５と消費電流（電源電流）Ｉｃｃ１～Ｉｃｃ５の検出信号をＡ／Ｄ変換ポートから周期的に読み込んでメモリに記憶し、続いて、メモリに記憶された複数の電源電圧と消費電流の平均値を各回路ブロックの内部電圧及び消費電流として求め、測定された内部電圧又は消費電流の変化から劣化異常を判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に劣化故障情報を設定して防災受信盤１０へ送信させる制御を行う。 The deterioration test unit 86 receives a test signal designating its own address from the disaster prevention receiving board 10 via the transmission unit 56, and the sensitivity test unit 82 and the dirt test unit 84 operate sequentially to perform the sensitivity test and the dirt test. In this case, detection signals of power supply voltages Vcc1 to Vcc5 and consumption currents (power supply currents) Icc1 to Icc5 under test which are detected by the voltage/current detector 78 provided on the power supply line to each circuit block are A/D converted. Periodically read from the port and store in memory, then determine the average value of the multiple power supply voltages and current consumption stored in the memory as the internal voltage and current consumption of each circuit block, and measure the internal voltage or consumption Deterioration abnormality is determined from the change in current, and the transmission unit 56 is instructed to set deterioration failure information in the response signal to the call signal matching the own address and control to transmit it to the disaster prevention receiver panel 10 .

本実施形態にあっては、火災検知器１２の各回路ブロックの劣化に伴い内部電圧および消費電流が低下することを想定されている。このため、検知器制御部５４のメモリには、工場出荷時前の試験等により測定された各回路ブロックの内部電圧及び消費電流が基準値として記憶されており、且つ、これらの基準値からどの程度減少したら劣化異常と判断するかを決める所定の電圧閾値と電流閾値が予め記憶され、更に、劣化異常と判断する前の予告のための所定の予告電圧閾値と予告電流閾値も予め記憶されている。 In this embodiment, it is assumed that the internal voltage and current consumption will decrease as each circuit block of the fire detector 12 deteriorates. For this reason, the memory of the detector control unit 54 stores the internal voltage and current consumption of each circuit block, which are measured by tests or the like before shipment from the factory, as reference values. Predetermined voltage thresholds and current thresholds for determining whether deterioration is determined to be abnormal when the degree of decrease is determined are stored in advance, and predetermined notice voltage thresholds and notice current thresholds are also stored in advance for advance notice before judgment is made that deterioration is abnormal. there is

劣化試験部８６は、劣化異常を判定する異常判定部としての機能を備え、各回路ブロックについて測定した内部電圧が所定の電圧閾値以下又は電圧閾値を下回った場合、又は、測定した消費電流が所定の電流閾値以下又は電流閾値を下回った場合に、劣化異常と判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に劣化故障情報を設定して防災受信盤１０へ送信させる制御を行う。なお、劣化異常の判断を確実なものとするため、劣化試験部８６は複数回連続して劣化異常と判断した場合に、劣化故障情報を設定した応答信号を送信させるようにしても良い。 The deterioration test unit 86 has a function as an abnormality determination unit that determines a deterioration abnormality, and detects when the internal voltage measured for each circuit block is equal to or less than a predetermined voltage threshold or falls below the voltage threshold, or when the measured current consumption If the current is less than or below the current threshold of , it is determined that there is a deterioration abnormality, and the transmission unit 56 is instructed to set deterioration failure information in the response signal to the call signal that matches the own address and send it to the disaster prevention receiver panel 10. Control transmission. In order to ensure the determination of the deterioration abnormality, the deterioration test section 86 may transmit a response signal in which deterioration failure information is set when the deterioration abnormality is determined continuously a plurality of times.

また、劣化試験部８６は、感度試験及び汚れ試験を通じて測定された回路ブロックの内部電圧が予告電圧閾値以下又は予告電圧閾値を下回った場合、又は、測定した消費電流が予告電流閾値以下又は予告電流閾値を下回った場合に、その回路ブロックの劣化異常が近いと判断し、伝送部５６に指示して、自己アドレスに一致する呼出信号に対する応答信号に劣化異常の予告情報を設定して防災受信盤１０へ送信させる制御を行う。 In addition, the deterioration test unit 86 determines whether the internal voltage of the circuit block measured through the sensitivity test and the contamination test is equal to or lower than the notice voltage threshold or lower than the notice voltage threshold, or the measured current consumption is equal to or less than the notice current threshold or less than the notice current threshold. If the value is below the threshold value, it is judged that the deterioration abnormality of the circuit block is near, and the transmission unit 56 is instructed to set the notification information of the deterioration abnormality in the response signal to the call signal matching the own address, and the disaster prevention receiving panel. 10 is controlled.

なお、劣化試験部８６による劣化試験は、内部電圧又は消費電流のみを測定して劣化の度合を前述したと同様に判断するようにしても良い。 In the deterioration test by the deterioration test section 86, only the internal voltage or the consumption current may be measured and the degree of deterioration may be determined in the same manner as described above.

［防災監視システムの動作］
（防災受信盤の動作）
図５は防災受信盤の制御動作を示したフローチャートであり、図２の防災受信盤１０に設けられた盤制御部３４による制御動作となる。 [Operation of disaster prevention monitoring system]
(Operation of disaster prevention receiver)
FIG. 5 is a flow chart showing the control operation of the disaster prevention receiving board, which is the control operation by the board control section 34 provided in the disaster prevention receiving board 10 of FIG.

図５に示すように、防災受信盤１０の電源を投入してシステムが立ち上げられると、盤制御部３４は、ステップＳ１で所定の初期化処理を行った後にステップＳ２に進み、火災監視処理を行う。 As shown in FIG. 5, when the disaster prevention receiver panel 10 is powered on to start up the system, the panel control unit 34 performs predetermined initialization processing in step S1, and then proceeds to step S2 to perform fire monitoring processing. I do.

ステップＳ２の火災監視処理として、盤制御部３４は、伝送部３６ａ，３６ｂに指示してアドレスを順次指定した呼出信号を伝送路１４ａ，１４ｂに送信させ、アドレスが一致した火災検知器１２から送信された応答信号を受信して処理する。ここで、盤制御部３４が応答信号の受信により火災を検知した場合は、警報部３８により火災警報を出力させると共にＩＯ部４６を介し他設備の連動制御を指示し、また、モデム４４を介して図１に示した遠方監視制御設備３２に火災検知信号を送信して火災警報を出力させる制御を行う。 As the fire monitoring process in step S2, the panel control unit 34 instructs the transmission units 36a and 36b to transmit call signals with sequentially designated addresses to the transmission lines 14a and 14b, and the fire detectors 12 whose addresses match each other. receive and process the received response signal. Here, when the board control unit 34 detects a fire by receiving the response signal, the alarm unit 38 outputs a fire alarm and instructs interlocking control of other equipment via the IO unit 46, and also via the modem 44 control to transmit a fire detection signal to the remote monitoring control equipment 32 shown in FIG. 1 and output a fire alarm.

続いて、盤制御部３４は、ステップＳ３で例えば１日１回となる所定の試験タイミングへの到達を判別するとステップＳ４に進み、初期設定された最初の火災検知器１２のアドレスを指定した試験指示コマンドを設定した試験信号を送信し、火災検知器１２に感度試験、汚れ試験及び劣化試験を行わせる。 Subsequently, when the panel control unit 34 determines in step S3 that a predetermined test timing, for example, once a day, has been reached, the process proceeds to step S4. A test signal in which an instruction command is set is transmitted to cause the fire detector 12 to perform a sensitivity test, a contamination test and a deterioration test.

続いて、ステップＳ５に進み、盤制御部３４は試験を指示した火災検知器１２からの試験結果が設定された応答信号の受信を判別するとステップＳ６に進み、試験結果の報知と記憶を行う。 Subsequently, the process proceeds to step S5, and when the board control unit 34 determines reception of a response signal in which the test result is set from the fire detector 12 instructing the test, the process proceeds to step S6, and the test result is reported and stored.

ステップＳ６の試験結果として、盤制御部３４は、応答信号から感度異常の予告情報が得られた場合、警報部３８及び表示部４０に指示して、感度異常の予告警報の出力と表示、更にはプリンタ印字を行わせ、また、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に感度異常の予告信号を送信して感度異常の予告警報を出力させる。 As a result of the test in step S6, when the notice information of sensitivity abnormality is obtained from the response signal, the panel control section 34 instructs the alarm section 38 and the display section 40 to output and display the notice warning of sensitivity abnormality, causes the printer to print, and transmits a warning signal of sensitivity abnormality to the remote monitoring control equipment 32 from the modem 44 via the IG slave station equipment 20 shown in FIG. 1 to output a warning of sensitivity abnormality.

また、盤制御部３４は、感度異常予告警報を行った後に、応答信号からセンサ故障情報が得られた場合は、警報部３８及び表示部４０に指示して、センサ故障警報の出力と表示、更にはプリンタ印字を行わせ、また、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２にセンサ故障信号を送信してセンサ故障警報を出力させる。 Further, after issuing the sensitivity abnormality advance warning, the panel control unit 34, when sensor failure information is obtained from the response signal, instructs the alarm unit 38 and the display unit 40 to output and display the sensor failure alarm, Furthermore, the printer is caused to print, and a sensor failure signal is transmitted from the modem 44 to the remote monitoring control equipment 32 via the IG slave station equipment 20 shown in FIG. 1 to output a sensor failure alarm.

一方、盤制御部３４は、ステップＳ６の試験結果として、応答信号から汚れ異常の予告情報が得られた場合は、警報部３８及び表示部４０に指示して、汚れ異常の予告警報の出力と表示、更にはプリンタ印字を行わせ、また、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に汚れ異常の予告信号を送信して汚れ異常の予告警報を出力させる。 On the other hand, if, as a result of the test in step S6, the forewarning information of the contamination abnormality is obtained from the response signal, the panel control section 34 instructs the alarm section 38 and the display section 40 to output the forewarning of the contamination abnormality. Display and further, printer printing are performed, and an advance notice signal of contamination abnormality is transmitted from the modem 44 to the remote monitoring control equipment 32 via the IG slave station equipment 20 shown in FIG. 1 to output an advance warning of contamination abnormality. Let

また、盤制御部３４は、応答信号から汚れ異常情報が得られた場合は、警報部３８及び表示部４０に指示して、汚れ警報の出力と表示、更にはプリンタ印字を行わせ、また、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に汚れ異常信号を送信して汚れ異常警報を出力させ、透光性窓の清掃作業が行われる。 Further, when the contamination abnormality information is obtained from the response signal, the panel control unit 34 instructs the alarm unit 38 and the display unit 40 to output and display the contamination alarm, and further print the information. A dirt abnormality signal is transmitted from the modem 44 to the remote monitoring control equipment 32 via the IG slave station equipment 20 shown in FIG.

更に、盤制御部３４は、ステップＳ６の試験結果として、応答信号から劣化異常の予告情報が得られた場合は、警報部３８及び表示部４０に指示して、劣化異常の予告警報の出力と表示、更にはプリンタ印字を行わせ、また、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に劣化異常の予告信号を送信して劣化異常の予告警報を出力させる。 Further, when the warning information of the deterioration abnormality is obtained from the response signal as the result of the test in step S6, the board control section 34 instructs the alarm section 38 and the display section 40 to output the deterioration abnormality warning. Display and further, printer printing are performed, and a warning signal of deterioration abnormality is transmitted from the modem 44 to the remote monitoring control equipment 32 via the IG slave station equipment 20 shown in FIG. 1 to output a deterioration abnormality warning. Let

また、盤制御部３４は、応答信号から劣化異常情報が得られた場合は、警報部３８及び表示部４０に指示して、劣化警報の出力と表示、更にはプリンタ印字を行わせ、また、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に劣化異常信号を送信して劣化異常警報を出力させ、予備の火災検知器への交換作業等の対処が行われる。 Further, when the deterioration abnormality information is obtained from the response signal, the board control unit 34 instructs the alarm unit 38 and the display unit 40 to output and display the deterioration alarm, and further print the deterioration alarm. A deterioration abnormality signal is transmitted from the modem 44 to the remote monitoring control equipment 32 via the IG slave station equipment 20 shown in FIG. will be

続いて、ステップＳ７に進み、火災検知器１２の全アドレスについての試験終了を判別するまで、ステップＳ４～Ｓ７の処理を繰り返す。 Subsequently, the process proceeds to step S7, and the processing of steps S4 to S7 is repeated until it is determined that the test for all addresses of the fire detector 12 has been completed.

（火災検知器の動作）
図６は火災検知器の制御動作を示したフローチャートであり、図４の火災検知器１２に設けられた検知器制御部５４による制御動作となる。 (Action of fire detector)
FIG. 6 is a flow chart showing the control operation of the fire detector, which is the control operation by the detector control section 54 provided in the fire detector 12 of FIG.

図６に示すように、防災受信盤１０からの電源供給を受けて火災検知器１２が立ち上げられると、検知器制御部５４は、ステップＳ１１で所定の初期化処理を行った後にステップＳ１２に進み、火災判断処理を行う。 As shown in FIG. 6, when the fire detector 12 is activated by receiving the power supply from the disaster prevention receiver panel 10, the detector control unit 54 performs predetermined initialization processing in step S11, and then proceeds to step S12. Proceed to perform fire judgment processing.

ステップＳ１２の火災判断処理として、検知器制御部５４は、火災検知部６０Ｒ，６０Ｌの増幅処理部６６，７０から出力された受光値を読み込み、感度試験で得られた補正値及び汚れ試験で得られた補正値による受光値を補正した後に、両者の比率を求め、所定の閾値を超えた場合に火災と判断し、伝送部５６に指示し、自身のアドレスを指定した呼出信号の受信に対する応答信号に火災検知情報を設定して防災受信盤１０に送信させる。 As the fire determination process in step S12, the detector control unit 54 reads the received light values output from the amplification processing units 66 and 70 of the fire detection units 60R and 60L, and the corrected values obtained in the sensitivity test and the contamination test. After correcting the received light value by the correction value obtained, the ratio of the two is obtained, and if it exceeds a predetermined threshold value, it is determined that there is a fire, and the transmitter 56 is instructed to respond to the reception of the call signal specifying its own address. Fire detection information is set in the signal and transmitted to the disaster prevention receiving panel 10 .

続いて、検知器制御部５４は、ステップＳ１３で自身のアドレスを指定した試験信号の受信を判別すると、ステップＳ１４～Ｓ１６で感度試験処理、汚れ試験処理及び劣化試験処理を行い、試験処理毎に試験結果を応答信号により防災受信盤１０に送信する。 Subsequently, when the detector control unit 54 determines reception of a test signal designating its own address in step S13, it performs sensitivity test processing, contamination test processing, and deterioration test processing in steps S14 to S16. The test result is transmitted to the disaster prevention receiving board 10 by a response signal.

即ち、ステップＳ１４の感度試験処理にあっては、検知器制御部５４は試験発光駆動部７２に指示して内部試験光源７４Ｒ，７５Ｒ，７４Ｌ，７５Ｌを発光駆動させ、炎試験光をセンサ部６４，６８に入射することで、増幅処理部６６，７０から出力される検出受光値を読み込み、基準受光値に基づき検出感度を求めると共に感度補正値を求めてメモリに記憶し、また、検出感度が感度異常の予告閾値以下の場合は伝送部５６に指示して感度異常の予告情報を設定した応答信号を防災受信盤１０に送信させ、更に、検出感度が感度異常閾値以下の場合は伝送部５６に指示してセンサ故障情報が設定された応答信号を防災受信盤１０に送信する。 That is, in the sensitivity test process of step S14, the detector control unit 54 instructs the test light emission driving unit 72 to drive the internal test light sources 74R, 75R, 74L, and 75L to emit the flame test light. , 68, the detected light reception values output from the amplification processing units 66 and 70 are read, the detection sensitivity is obtained based on the reference light reception value, and the sensitivity correction value is obtained and stored in the memory. If the detection sensitivity is equal to or less than the sensitivity abnormality threshold, the transmission unit 56 is instructed to transmit a response signal in which the sensitivity abnormality notification information is set to the disaster prevention receiver panel 10, and if the detection sensitivity is equal to or less than the sensitivity abnormality threshold, the transmission unit 56 to send a response signal in which the sensor failure information is set to the disaster prevention receiving panel 10 .

また、ステップＳ１５の汚れ試験処理にあっては、検知器制御部５４は試験発光駆動部７２に指示して外部試験光源７６Ｒ，７６Ｌを発光駆動させ、炎試験光を透光性窓５０Ｒ，５０Ｌを介してセンサ部６４，６８に入射させ、例えば増幅処理部６６から出力される受光値を読み込み、基準受光値に基づき減光率を求めると共に汚れ補正値を求めてメモリに記憶し、また、減光率が汚れ異常の予告閾値以上の場合は伝送部５６に指示して汚れ異常の予告情報が設定された応答信号を防災受信盤１０に送信させ、更に、減光率が汚れ異常閾値以下の場合は伝送部５６に指示して汚れ異常情報が設定された応答信号を防災受信盤１０に送信する。 In the contamination test process of step S15, the detector control unit 54 instructs the test light emission drive unit 72 to drive the external test light sources 76R and 76L to emit the flame test light through the translucent windows 50R and 50L. for example, reads the light reception value output from the amplification processing unit 66, calculates the light attenuation rate based on the reference light reception value, calculates the dirt correction value, and stores it in a memory, If the light reduction rate is equal to or higher than the dirt abnormality notice threshold, the transmitter 56 is instructed to transmit a response signal in which the dirt abnormality notice information is set to the disaster prevention receiving panel 10, and the light reduction rate is equal to or less than the dirt abnormality threshold. In the case of , the transmission unit 56 is instructed to transmit a response signal in which dirt abnormality information is set to the disaster prevention receiving panel 10 .

更に、ステップＳ１６の劣化試験処理にあっては、ステップＳ１４の感度試験及びステップＳ１５の汚れ試験における各回路ブロックに対する内部電圧と消費電流を電圧電流検出部７８の検出信号に基づいて求め、内部電圧が予告電圧閾値以下の場合または消費電流が予告電流閾値以下の場合、伝送部５６に指示して劣化異常の予告情報が設定された応答信号を防災受信盤１０に送信させ、更に、内部電圧が電圧閾値以下の場合または消費電流が電流閾値以下の場合、伝送部５６に指示して劣化異常情報が設定された応答信号を防災受信盤１０に送信する。 Further, in the deterioration test process of step S16, the internal voltage and consumption current for each circuit block in the sensitivity test of step S14 and the contamination test of step S15 are obtained based on the detection signal of the voltage/current detector 78, and the internal voltage is equal to or less than the notice voltage threshold, or if the current consumption is equal to or less than the notice current threshold, the transmission unit 56 is instructed to transmit a response signal in which notice information of deterioration abnormality is set to the disaster prevention receiver panel 10, and further, the internal voltage is If the voltage is equal to or less than the voltage threshold or the current consumption is equal to or less than the current threshold, the transmission unit 56 is instructed to transmit a response signal in which deterioration abnormality information is set to the disaster prevention receiver panel 10 .

［防災受信盤で劣化異常を判断する実施形態］
トンネル防災システムの他の実施形態として、図４に示した火災検知器１２の検知器制御部５４に設けられた劣化試験部８６は、感度試験及び汚れ試験における内部電圧及び消費電流を測定し、測定した内部電圧及び消費電流の測定値を設定した応答信号を防災受信盤１０に送信し、図２に示した防災受信盤１０の盤制御部３４に劣化異常を判定する異常判定部の機能を設け、防災受信盤１０の盤制御部３４により火災検知器１２から受信した試験時の内部電圧と消費電流の測定値から検知器回路部の劣化を判断する。このため盤制御部３４のメモリには、劣化異常を判断する所定の電圧閾値及び電流閾値、及びそれより大きい所定の予告電圧閾値及び予告電流閾値が予め設定されている。 [Embodiment in which deterioration abnormality is determined by a disaster prevention receiver]
As another embodiment of the tunnel disaster prevention system, the deterioration test unit 86 provided in the detector control unit 54 of the fire detector 12 shown in FIG. A response signal in which measured values of the measured internal voltage and current consumption are set is transmitted to the disaster prevention receiver panel 10, and the function of the abnormality determination section for determining the deterioration abnormality is added to the panel control section 34 of the disaster prevention receiver panel 10 shown in FIG. Deterioration of the detector circuit section is judged from the measured values of the internal voltage and current consumption during the test received from the fire detector 12 by the board control section 34 of the disaster prevention receiver board 10 . For this reason, the memory of the panel control unit 34 is preset with a predetermined voltage threshold value and a current threshold value for determining a deterioration abnormality, and a predetermined notice voltage threshold value and a notice current threshold value larger than these.

盤制御部３４による検知器回路部の劣化判断は、火災検知器１２の劣化試験部８６の場合と同様であり、盤制御部３４は、火災検知器１２の各回路ブロックについて測定された内部電圧が予告電圧閾値以下又は予告電圧閾値を下回った場合、又は、測定された消費電流が予告電流閾値以下又は予告電流閾値を下回った場合に、その回路ブロックの劣化故障が近いと判断し、火災検知器１２のアドレスを特定した劣化異常の予告警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させ、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に送信し、劣化異常予告を報知させる制御を行う。 Deterioration judgment of the detector circuit unit by the board control unit 34 is the same as the case of the deterioration test unit 86 of the fire detector 12, and the board control unit 34 detects the internal voltage measured for each circuit block of the fire detector 12. is below the notice voltage threshold or below the notice voltage threshold, or when the measured current consumption is below the notice current threshold or below the notice current threshold, it is determined that the deterioration failure of the circuit block is near, and fire is detected. An advance warning of deterioration abnormality specifying the address of the device 12 is notified by the alarm sound of the display unit 40, display display, and printing, and is sent from the modem 44 to the remote monitoring control equipment 32 via the IG slave station equipment 20 shown in FIG. Control is performed to transmit and notify deterioration abnormality notice.

また、盤制御部３４は、火災検知器１２の各回路ブロックについて測定された内部電圧が所定の電圧閾値以下又は電圧閾値を下回った場合、又は、測定した消費電流が所定の電流閾値以下又は電流閾値を下回った場合に劣化異常と判断し、火災検知器のアドレスを特定した劣化異常警報を表示部４０の警報音、ディスプレイ表示、印刷により報知させ、モデム４４から図１に示したＩＧ子局設備２０を介して遠方監視制御設備３２に送信し、劣化異常を報知させる制御を行う。 In addition, the board control unit 34 is controlled when the internal voltage measured for each circuit block of the fire detector 12 is below a predetermined voltage threshold or below the voltage threshold, or when the measured current consumption is below a predetermined current threshold or current If the threshold value is exceeded, it is determined that there is a deterioration abnormality, and a deterioration abnormality alarm specifying the address of the fire detector is notified by the alarm sound of the display unit 40, display display, and printing, and the IG slave station shown in FIG. 1 from the modem 44. It is transmitted to the remote monitoring and control equipment 32 via the equipment 20, and control is performed to report the deterioration abnormality.

また、盤制御部３４は、メモリに火災検知器１２から受信した内部電圧及び消費電流の測定値を時系列的なログ情報として記憶しており、例えば、所定のログ出力操作に基づき、火災検知器１２のアドレス順に時系列的な内部電圧と消費電流の測定値をディスプレイ上に一覧表示するか、プリンタで印刷出力させることで、火災検知器１２の劣化の進行具合をアドレス順に判断可能となる。この場合、時間的な並びは、日単位、週単位、月単位、更には指定された日数単位とすることで、劣化による内部電圧や消費電流の変化を強調させることができる。 In addition, the panel control unit 34 stores the measured values of the internal voltage and current consumption received from the fire detector 12 in the memory as chronological log information. By displaying a list of measured values of the internal voltage and current consumption chronologically in the order of addresses of the fire detector 12 on the display or by printing them out on a printer, it is possible to judge the progress of deterioration of the fire detector 12 in the order of the addresses. . In this case, the chronological arrangement can be performed in units of days, weeks, months, or even specified number of days, thereby emphasizing changes in internal voltage and current consumption due to deterioration.

また、ログ情報の出力形式として、内部電圧と消費電流の数値表示以外に、時間軸を横軸、電圧電流を縦軸としたグラフ表示としても良い。 As an output format of the log information, in addition to the numerical display of the internal voltage and current consumption, a graph display with the time axis as the horizontal axis and the voltage and current as the vertical axis may be used.

更に、盤制御部３４は、表示部４０のディスプレイを利用した操作部４２の操作に基づき、劣化異常を判断する閾値と、劣化異常の予告を判断する予告閾値を変更させる制御を行う。この閾値及び予告閾値を変更させる制御は、全ての火災検知器１２の閾値と予告閾値を一斉に変更させることもできるし、アドレスを指定して特定の火災検知器１２の閾値と予告閾値を変更させることもできる。 Furthermore, the panel control unit 34 performs control to change the threshold for determining deterioration abnormality and the notice threshold for determining the notice of deterioration abnormality based on the operation of the operation unit 42 using the display of the display unit 40 . The control for changing the threshold and the notice threshold can change the threshold and the notice threshold of all the fire detectors 12 all at once, or change the threshold and the notice threshold of a specific fire detector 12 by specifying an address. You can also let

［本発明の変形例］
（火災検知器）
上記の実施形態は２波長方式の火災検知器を例にとっているが、他の方式でも良く、例えば、前述した２波長に加え、ＣＯ2の共鳴放射帯である４．４～４．５μｍ帯に対し短波長側の、例えば、３．８μｍ付近の波長帯域における放射線エネルギーを２波長式と同様の手法で検知し、これらの３波長帯域における各受光信号の相対比によって炎の有無を判定する３波長式の炎検知器としても良い。 [Modification of the present invention]
(fire detector)
Although the above embodiment uses a two-wavelength type fire detector as an example, other types may be used. Radiation energy in a wavelength band near 3.8 μm on the short wavelength side, for example, is detected by a method similar to the two-wavelength method, and the presence or absence of a flame is determined based on the relative ratio of the received light signals in these three wavelength bands. It may also be used as a type flame detector.

（汚れ試験）
上記の実施形態は、火災検知部６０Ｒ，６０Ｌに設けたセンサ部６４と増幅処理部６６により外部試験光源７６Ｒ，７６Ｌからの試験光により得られた受光値を使用して減光率を求めているが、汚れ試験専用のセンサ部と増幅処理部を設けて外部試験光源７６Ｒ，７６Ｌからの試験光による受光値から減光率を求めるようにしても良い。 (dirt test)
In the above embodiment, the light attenuation rate is obtained by using the light reception values obtained from the test light from the external test light sources 76R and 76L by the sensor units 64 and the amplification processing units 66 provided in the fire detection units 60R and 60L. However, a sensor section and an amplification processing section dedicated to the contamination test may be provided to obtain the light attenuation rate from the received light value of the test light from the external test light sources 76R and 76L.

（劣化試験）
上記の実施形態は、火災検知器１２の回路ブロックの劣化により内部電圧と消費電流が減少することを想定して劣化の度合を判断されているが、回路ブロックによっては、絶縁低下等による漏洩電流等により消費電流が増加することが想定されることから、例えば、消費電流については、所定の基準消費電流より高い電流閾値を設定し、この電流閾値以上又は電流閾値を超えた場合に劣化異常と判断して劣化異常警報を出力するようにしても良い。 (Deterioration test)
In the above embodiment, the degree of deterioration is determined on the assumption that the internal voltage and current consumption will decrease due to deterioration of the circuit block of the fire detector 12. Since it is assumed that current consumption will increase due to factors such as this, for example, a current threshold that is higher than a predetermined reference current consumption is set for the current consumption, and if the current threshold is equal to or higher than the current threshold, it is considered to be a deterioration abnormality. A deterioration abnormality alarm may be output after making a judgment.

（火災検知器の内部電圧と消費電流の測定）
上記の実施形態では、火災検知器１２の電源部５８から各回路ブロックに供給される電源電圧と電源電流を、内部電圧及び消費電流として測定して劣化度合を判断されているが、電源部５８から全ての回路部に供給される電源電圧と電源電流を、内部電圧及び消費電流として測定して劣化度合を判断しても良い。これにより電圧電流検出部７８が１つで済み、回路構成と測定処理を簡単することができる。 (Measurement of fire detector internal voltage and current consumption)
In the above embodiment, the power supply voltage and power supply current supplied from the power supply unit 58 of the fire detector 12 to each circuit block are measured as the internal voltage and current consumption to determine the degree of deterioration. The degree of deterioration may be determined by measuring the power supply voltage and power supply current supplied to all the circuit units from the internal voltage and current consumption. As a result, only one voltage/current detector 78 is required, and the circuit configuration and measurement processing can be simplified.

また、回路部の劣化判断に使用する内部電圧と消費電流の測定を、感度試験と汚れ試験の試験時に測定しているが、それ以外の適宜の火災感知器の試験時に測定しても良い。更に、内部電圧と消費電流を火災検知器の試験時に測定する以外に、試験を行っていない定常監視状態での内部電圧と消費電流を測定して回路部の劣化度合を判断するようにしても良い。 Also, the internal voltage and current consumption used to determine the deterioration of the circuit section are measured during the sensitivity test and dirt test, but they may be measured during other appropriate fire sensor tests. Furthermore, in addition to measuring the internal voltage and current consumption during testing of the fire detector, the internal voltage and current consumption can be measured in a steady monitoring state where no test is being performed to determine the degree of deterioration of the circuit section. good.

（異常リストの表示）
また、防災受信盤１０により異常を報知させるため、異常のリストと汚れ警報のリストを同一のリスト上に表示しても良い。 (Display of error list)
Further, in order to notify the abnormality by the disaster prevention receiving panel 10, the list of abnormality and the list of dirt alarm may be displayed on the same list.

（劣化異常となった火災検知器の取扱い）
また、劣化異常となった火災検知器について、火災検知結果を防災受信盤側で採用しないようにしても良い。これにより、正常な検知結果のみで火災を監視することが可能となり、非火災報を低減させることができる。また、上記において、検知範囲の重なる隣接感知器に異常がない場合のみ当該劣化異常火災検知器の火災検知結果を採用しないように制御することが、最低限の監視を行う上で好適である。 (Handling of fire detectors with abnormal deterioration)
In addition, the fire detection result of the fire detector that has deteriorated abnormally may not be used on the disaster prevention receiver side. As a result, it is possible to monitor fires based only on normal detection results, thereby reducing non-fire alarms. In addition, in the above, it is preferable to perform control so that the fire detection result of the deterioration abnormal fire detector is not adopted only when there is no abnormality in the adjacent detector whose detection range overlaps, in order to perform the minimum monitoring.

（火災検知器の表示灯）
また、火災検知器に表示灯を設け、異常時には発光表示させるようにしても良い。これにより、異常の対応を行う作業員がどの火災検知器に対して対処すればよいか現場にて一見で分かるようになる。また、当該異常の発光表示について、防災受信盤側から発光許可信号が出力されたときのみ、発光するようにしても良い。これにより、通常使用時においては異常の発光表示をしないため、運転者等が注意をひかれることはない。また、点検時においてのみ発光表示を行うことで、点検時においては一見で把握できるようになり、注意を引く程度の発光量で発光することも可能となる。 (Fire detector indicator light)
In addition, an indicator lamp may be provided in the fire detector so that it may emit light when there is an abnormality. As a result, it becomes possible for a worker who deals with an abnormality to know at a glance which fire detector should be dealt with at the site. Further, the light emission indication of the abnormality may be made to emit light only when the light emission permission signal is output from the disaster prevention receiver side. As a result, the abnormality is not displayed by light emission during normal use, so that the attention of the driver or the like is not drawn. In addition, by performing light emission display only during inspection, it becomes possible to grasp at a glance at the time of inspection, and it is also possible to emit light with an amount of light emission that draws attention.

（火災検知器のログ）
また、火災検知器は消費電流・内部電圧・劣化検出状態をログとして自身のメモリに記憶するようにしても良い。火災検知器はアドレス設定器等の外部機器に接続され、メモリに記憶したログデータの読み出しが行われる。 (fire detector log)
Also, the fire detector may store current consumption, internal voltage, and deterioration detection state as a log in its own memory. The fire detector is connected to an external device such as an address setting device, and the log data stored in the memory is read.

（その他）
また本発明は、その目的と利点を損なわない適宜の変形を含み、更に上記の実施形態に示した数値による限定は受けない。 (others)
The present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

１ａ：上り線トンネル
１ｂ：下り線トンネル
１０：防災受信盤
１２：火災検知器
１４，１４ａ，１４ｂ：伝送路
１６：消火ポンプ設備
１８：冷却ポンプ設備
２０：ＩＧ子局設備
２２：換気設備
２４：警報表示板設備
２６：ラジオ再放送設備
２８：テレビ監視設備
３０：照明設備
３２：遠方監視制御設備
３４：盤制御部
３６，３６ａ，３６ｂ，５６：伝送部
４６：ＩＯ部
５０Ｒ，５０Ｌ：透光性窓
５１：センサ収納部
５２Ｒ，５２Ｌ：試験光源用透光窓
５４：検知器制御部
５８：電源部
６０Ｒ，６０Ｌ：火災検知部
６４，６８：センサ部
６６，７０：増幅処理部
７２：試験発光駆動部
７４Ｒ，７４Ｌ，７５Ｒ，７５Ｌ：内部試験光源
７６Ｒ，７６Ｌ：外部試験光源
７８：電圧電流検出部
８０：火災判断部
８２：感度試験部
８４：汚れ試験部
８６：劣化試験部 1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receiver panel 12: Fire detectors 14, 14a, 14b: Transmission line 16: Fire pump equipment 18: Cooling pump equipment 20: IG substation equipment 22: Ventilation equipment 24: Alarm display board facility 26: Radio rebroadcast facility 28: TV monitoring facility 30: Lighting facility 32: Remote monitoring control facility 34: Panel control units 36, 36a, 36b, 56: Transmission unit 46: IO units 50R, 50L: Translucent Property window 51: Sensor storage units 52R, 52L: Translucent window for test light source 54: Detector control unit 58: Power supply units 60R, 60L: Fire detection units 64, 68: Sensor units 66, 70: Amplification processing unit 72: Test Light emission drive units 74R, 74L, 75R, 75L: Internal test light sources 76R, 76L: External test light sources 78: Voltage/current detection unit 80: Fire determination unit 82: Sensitivity test unit 84: Dirt test unit 86: Deterioration test unit

Claims (2)

検知エリアの火災を検出する火災検知器を設けた防災システムであって、
前記火災検知器は、機能構成部毎に回路ブロックが分けられて構成され、
少なくとも前記火災検知器の故障状態である故障異常に至る以前の劣化状態と認められる劣化異常を判定する異常判定部を備え、
前記異常判定部は、前記劣化異常の判定対象とする前記回路ブロックの各々について、前記火災検知器の検出感度が所定レベルに低下する検出感度異常を判定する試験時に電源部から前記回路ブロックの各々に出力される電源電圧又は電源電流の少なくとも何れか一方に基づき前記劣化異常を判定することにより、当該劣化異常が発生した回路ブロックを特定可能としたことを特徴とする防災システム。
A disaster prevention system provided with a fire detector that detects a fire in a detection area,
The fire detector is configured by dividing a circuit block for each functional component,
At least an abnormality determination unit that determines a deterioration abnormality recognized as a deterioration state before reaching a failure abnormality that is a failure state of the fire detector,
For each of the circuit blocks to be determined for the deterioration abnormality, the abnormality determination unit performs a test for determining an abnormality in detection sensitivity in which the detection sensitivity of the fire detector is reduced to a predetermined level. A disaster prevention system characterized by being able to identify a circuit block in which the deterioration abnormality has occurred by determining the deterioration abnormality based on at least one of the power supply voltage and the power supply current output to.
 検知エリアの火災を検出する火災検知器であって、
機能構成部毎に回路ブロックが分けられて構成されると共に、少なくとも前記火災検知器の故障状態である故障異常に至る以前の劣化状態と認められる劣化異常を判定する異常判定部を備え、
前記異常判定部は、前記劣化異常の判定対象とする前記回路ブロックの各々について、前記火災検知器の検出感度が所定レベルに低下する検出感度異常を判定する試験時に電源部から前記回路ブロックの各々に出力される電源電圧又は電源電流の少なくとも何れか一方に基づき劣化異常を判定することにより、当該劣化異常が発生した回路ブロックを特定可能としたことを特徴とする火災検知器。
A fire detector for detecting fire in a detection area,
A circuit block is divided for each functional configuration unit, and an abnormality determination unit is provided for determining at least a deterioration abnormality recognized as a deterioration state before reaching a failure abnormality, which is a failure state of the fire detector,
For each of the circuit blocks to be determined for the deterioration abnormality, the abnormality determination unit performs a test for determining an abnormality in detection sensitivity in which the detection sensitivity of the fire detector is reduced to a predetermined level. A fire detector characterized by being able to specify a circuit block in which deterioration abnormality has occurred by determining deterioration abnormality based on at least one of power supply voltage or power supply current output to.
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