JP4167696B2 - Abnormal temperature detector - Google Patents
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Description
本発明は、物体から放射される赤外線を赤外線検知素子で検知することによって異常な温度変化を検知し、火災発生等を検知する異常温度検知装置に関する。 The present invention relates to an abnormal temperature detection device that detects an abnormal temperature change by detecting infrared rays emitted from an object with an infrared detection element, and detects the occurrence of a fire or the like.
人体と背景との温度差を赤外線のエネルギー量の差として焦電素子等の赤外線検知素子を用いて検出させることにより、人体の存在を検知する赤外線受光式の人体検知装置がある。この人体検知装置では、赤外線検知素子からの検知領域内に見かけ上の温度変化が生じた場合に、人体が存在するとして判断するよう構成されている。
そして従来技術によれば、赤外線検知素子を備えた人体検知装置を利用し、人体検知を行うと同時に、火災発生などの異常温度検知を行う異常検知装置が知られている。(例えば特許文献1を参照)
従来の異常温度検知装置は、検知領域からの赤外線を受光してその受光量に応じた出力レベルの検知信号を出力する赤外線検知素子と、赤外線検知素子から出力される検知信号に基づいて検知領域内の人体の有無を判断する人体検知部と、赤外線検知素子から出力される検知信号に基づいて検知領域内での火災発生等による異常な温度変化を検知する異常温度検知部とから構成され、前記人体検知部で人体の存在を検知した場合は侵入警報を発報するとともに、前記異常温度検知部で異常温度を検知した場合は、侵入警報と異なる警報(例えば火災警報)を発報するように構成されている。
According to the prior art, there is known an abnormality detection device that uses a human body detection device provided with an infrared detection element to detect a human body and at the same time detect an abnormal temperature such as the occurrence of a fire. (For example, see Patent Document 1)
A conventional abnormal temperature detection device receives an infrared ray from a detection region and outputs a detection signal having an output level corresponding to the amount of light received, and a detection region based on a detection signal output from the infrared detection device A human body detection unit that determines the presence or absence of a human body, and an abnormal temperature detection unit that detects an abnormal temperature change due to a fire in the detection region based on a detection signal output from the infrared detection element, An intrusion alarm is issued when the human body detection unit detects the presence of a human body, and an alarm (for example, a fire alarm) different from the intrusion alarm is issued when an abnormal temperature is detected by the abnormal temperature detection unit. It is configured.
従来の異常温度検知装置では、検知領域から受光した赤外線の受光量が予め設定した値(設定レベル)を超えた場合、人体検知または異常温度検知したと判断するよう構成しており、人体検知のための設定レベル(人体検知温度)と異常温度検知のための設定レベル(火災発生温度)とがそれぞれ設定されている。
また火災発生等による異常な温度変化を検知する異常温度検知では、前記設定レベルを複数回数超え、かつ、ちらつきや揺らぎ現象を生じる炎のパルスを複数回検知した場合、火災が発生したと判断し、火災警報を発報するよう構成することによって、火災警報の誤報を抑制していた。そして火災警報の誤報抑制のため、炎の発生を火災警報発報の前提としており、炎の発生前に火災の危険性がある異常温度の警報を発報することは出来なかった。
In the conventional abnormal temperature detection device, when the amount of infrared light received from the detection region exceeds a preset value (set level), it is determined that a human body is detected or an abnormal temperature is detected. The setting level for detecting the human body temperature (human body detection temperature) and the setting level for detecting the abnormal temperature (fire occurrence temperature) are set.
Also, in abnormal temperature detection that detects abnormal temperature changes due to the occurrence of fire, etc., it is determined that a fire has occurred if the set level is exceeded multiple times and a flame pulse that causes flickering or fluctuation is detected multiple times. By configuring the system to issue a fire alarm, the misinformation of the fire alarm was suppressed. In order to suppress false alarms for fire alarms, the occurrence of flames is assumed to be fire alarms, and it was not possible to issue alarms for abnormal temperatures that could cause fires before the flames occurred.
本発明の異常温度検知装置によれば、検知領域からの赤外線を受光してその受光量に応じた出力レベルの検知信号を出力する赤外線検知素子と、この赤外線検知素子から出力される検知信号に基づいて検知領域の区画毎の測定温度を取得する温度検知部と、前記温度検知部からの出力信号に基づいて検知領域の異常温度を検知する制御部と、前記制御部の制御によって異常温度検知警報を発報する出力部とから構成される異常温度検知装置において、温度検知部から逐次入力される出力信号に基づいて制御部は、検知領域の区画毎に今回温度と経時温度差とからなる温度情報を取得し、さらに各区画毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定し、異常温度範囲の広がる速さに応じて種類の異なる警報を発報するよう出力部を制御するものである。 According to the abnormal temperature detection device of the present invention, an infrared detection element that receives infrared light from a detection region and outputs a detection signal having an output level corresponding to the amount of received light, and a detection signal output from the infrared detection element. A temperature detection unit that acquires a measured temperature for each section of the detection region based on the control unit that detects an abnormal temperature in the detection region based on an output signal from the temperature detection unit, and an abnormal temperature detection by the control of the control unit In the abnormal temperature detection device configured with an output unit that issues an alarm, the control unit includes a current temperature and a temporal temperature difference for each section of the detection region based on an output signal sequentially input from the temperature detection unit. The temperature information is acquired, the abnormal temperature is detected based on the temperature information for each section, and the speed at which the abnormal temperature range expands is determined. The controls the output unit to alarm.
さらにこの発明の異常温度検知方法によれば、検知領域からの赤外線を受光してその受光量に応じた出力レベルの検知信号を出力する赤外線検知素子によって検知領域を区画毎に温度測定し、各区画毎の温度情報に基づいて検知領域の異常温度を検知し、異常温度検知警報を発報する異常温度検知方法において、検知領域の区画毎に今回温度と経時的温度差とからなる温度情報を取得する工程と、前記各区画毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定する工程とによって、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行い、その広がる速さに応じて種類の異なる警報を発報する。 Furthermore, according to the abnormal temperature detection method of the present invention, the temperature of the detection region is measured for each section by the infrared detection element that receives infrared light from the detection region and outputs a detection signal of an output level according to the amount of received light. In the abnormal temperature detection method that detects abnormal temperature in the detection area based on the temperature information for each section and issues an abnormal temperature detection alarm, temperature information consisting of the current temperature and the temperature difference over time is detected for each section of the detection area. The abnormal temperature classified according to the speed at which the abnormal temperature range is expanded by the step of acquiring and the step of detecting the abnormal temperature based on the temperature information for each section and determining the speed at which the abnormal temperature range is expanded Detects and issues different types of alarms according to the speed of spread.
本発明の異常温度検知装置および異常温度検知方法によれば、赤外線検知素子(サーモパイル素子)を使用して検知領域の区画毎の測定温度を取得し、さらに各区画毎の温度情報(今回温度と経時温度差)に基づいて検知領域で発生した異常温度を検知するとともに異常温度範囲が広がる速さを判定し、異常温度範囲が広がる速さに応じて異なる種類の警報を発報するため、検知した温度(異常温度)が非常に高温でなくてもその異常温度範囲の広がる速さが急激である異常な温度変化を検知することによって火災発生の危険性がある異常温度を検知することができ、炎の存在の有無にかかわらず、火災発生の危険性を知らせることができる。つまり異常温度範囲の広がりが急激であるときのTPH−A発報と、それほど急激でないときのTPH−B発報と、広がりが遅いが非常に高温であるときのTPH−C発報とによって、火災発生の危険性を知らせることができる。
また異常温度(火災検知温度)の検出のみで火災発生を判断して警報を発報する従来技術の異常温度検知装置に対し、本発明の異常温度検知装置では異常温度の検出と異常温度範囲が広がる速さを判定することによって、異常温度範囲の広がる速さに応じて種類分けした異常温度検知をし、それぞれ種類の異なる警報を発報するため、火災発生の危険度に応じた検知、警報の発報をすることができるとともに、火災警報の誤報も抑制することができる。
According to the abnormal temperature detection device and the abnormal temperature detection method of the present invention, an infrared detection element (thermopile element) is used to acquire a measured temperature for each section of the detection region, and further, temperature information for each section (current temperature and Detects abnormal temperature generated in the detection area based on the temperature difference over time), determines the speed at which the abnormal temperature range expands, and issues different types of alarms according to the speed at which the abnormal temperature range expands. Even if the measured temperature (abnormal temperature) is not very high, it is possible to detect an abnormal temperature that may cause a fire by detecting an abnormal temperature change where the speed of expansion of the abnormal temperature range is rapid. , Regardless of the presence or absence of flames, can inform the danger of fire. That is, TPH-A reporting when the abnormal temperature range spreads suddenly, TPH-B reporting when not very sharp, and TPH-C reporting when the spreading is slow but very hot, Can inform the danger of fire.
Also, in contrast to the prior art abnormal temperature detection device that detects the occurrence of a fire only by detecting abnormal temperature (fire detection temperature) and issues an alarm, the abnormal temperature detection device of the present invention has an abnormal temperature detection and abnormal temperature range. By detecting the spreading speed, abnormal temperature detection is performed according to the speed at which the abnormal temperature range spreads, and different types of alarms are issued. Can be issued, and misreporting of fire alarms can be suppressed.
この発明による異常温度検知装置の好適な実施例について、図1から図9を参照して説明する。 A preferred embodiment of the abnormal temperature detection device according to the present invention will be described with reference to FIGS.
図1は、本発明による異常温度検知装置を説明する図である。
本発明による異常温度検知装置は、赤外線の受光量によって物体の表面温度を計測できる赤外線検知素子(サーモパイル素子)を使用し、火災発生などの危険性がある異常な温度変化を検知して警報する異常温度検知装置10であって、図1(a)に示すように、監視したい領域に設置し(例えば監視領域の天井など)、該領域(以下、検知領域という)にある物体の温度変化を検知し、検知領域内で異常温度の発生を検知したときは異常温度検知警報を発報し、検知領域を監視・警備する。
FIG. 1 is a diagram illustrating an abnormal temperature detection device according to the present invention.
The abnormal temperature detection device according to the present invention uses an infrared detection element (thermopile element) that can measure the surface temperature of an object based on the amount of received infrared light, and detects and alarms an abnormal temperature change that may cause a fire. As shown in FIG. 1A, the abnormal
本発明の実施例による異常温度検知装置10は、図1(b)のブロック図に示すように、集光レンズ1と、特定波長帯域の赤外線のみを透過させる光学フィルタ2と、赤外線の受光によりその検知信号を出力する赤外線検知素子3と、赤外線検知素子3から出力される検知信号を増幅する増幅部4と、当該増幅部4に接続される温度検知部5と、前記温度検知部5からの出力信号が入力される制御部6と、前記制御部6の制御によって種類の異なる警報を発報する出力部7とを備える。
As shown in the block diagram of FIG. 1B, the abnormal
前記赤外線検知素子3は、複数の区画に区切られた検知領域から各区画毎の赤外線を受光してその各受光量に応じた出力レベルの検知信号を各区画毎に出力するように構成される。
検知領域の区画毎に検知信号を出力する赤外線検知素子3として、例えば、複数の検知素子を並べ、検知素子毎の検知範囲がそれぞれ検知領域を複数の区画に区切るように設定され、検知領域の各区画に対応した各検知素子から、各区画毎の検知信号をそれぞれ出力するように構成したものや、あるいは、モータ等を用いて検知素子を制御して検知素子による検知範囲を随時変更する等の手段によって、一の検知素子から検知領域内の複数の区画の検知信号を各区画毎に出力可能とし、各区画毎の検知信号をそれぞれ出力するように構成したものを使用する。
そして前記温度検知部5では、赤外線検知素子3からの検知信号に基づいて検知領域に在る物体の表面温度を計測し、前記検知素子毎に測定温度を取得する。つまり検知領域の区画毎の測定温度を取得することができる。
また前記制御部6では、温度検知部5からの出力信号に基づいて検知領域内に火災発生などの危険性がある異常な温度変化が発生したか否かを判定(異常温度検知)し、異常温度を検知したときは出力部7から異常温度検知警報を発報するよう制御する。
なお前記制御部6において、温度検知部5からの出力信号に基づいて検知領域内に人体の存在があるか否かも判定し、出力部7から人体検知警報も発報できるように構成してもよい。
The
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この発明による異常温度検知装置10では、温度検知部5からの出力信号(検知素子毎の測定温度)が制御部6に逐次入力され、該制御部6では逐次入力される出力信号に基づいて、検知領域の区画毎に今回温度と経時温度差(前回温度と今回温度との温度差)とからなる温度情報を取得する。また前記制御部6では、検知素子毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定することによって、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行い、それぞれ種類の異なる警報を発報する。
In the abnormal
図2から図5を参照して、本発明の第1実施例による異常温度検知方法について説明する。 The abnormal temperature detection method according to the first embodiment of the present invention will be described with reference to FIGS.
第1実施例では、図5に示すように、8つの赤外線検知素子(サーモパイル素子)を1列に配列した一次元構成の赤外線検知素子(i=1〜I,I=8)を使用した異常温度検知装置10によって検知領域の異常温度を検知する。そして8つの赤外線検知素子〔8×1〕によって、検知領域を8つの区画〔8×1〕に区切るようにして各区画毎の検知信号がそれぞれ出力され、検知領域の区画毎に温度情報を取得する。つまり各検知素子の座標値が検知領域の各区画の座標値に対応する。従って、各検知素子から出力される検知信号をもとに取得した温度情報を各検知素子毎に解析することによって、検知領域の各区画毎に温度情報を取得し、当該温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定することができる。
この実施例では、検知領域からの赤外線を受光してその受光量に応じた出力レベルの検知信号を出力する赤外線検知素子(i=1〜8)によって検知領域を区画毎に温度測定し、前記検知素子毎の温度情報に基づいて検知領域の異常温度を検知し、異常温度検知警報を発報する異常温度検知方法において、今回温度と経時温度差(前回温度と今回温度との温度差)とからなる温度情報を検知素子毎に取得する工程と、前記検知素子毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定する工程とによって、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行い、その広がる速さに応じて種類の異なる警報を発報する。
In the first embodiment, as shown in FIG. 5, an abnormality using an infrared detection element (i = 1 to I, I = 8) having a one-dimensional configuration in which eight infrared detection elements (thermopile elements) are arranged in a row. The
In this embodiment, the temperature of the detection region is measured for each section by an infrared detection element (i = 1 to 8) that receives infrared light from the detection region and outputs a detection signal having an output level corresponding to the amount of light received. In the abnormal temperature detection method that detects the abnormal temperature in the detection area based on the temperature information for each detection element and issues an abnormal temperature detection alarm, the current temperature and the time-dependent temperature difference (temperature difference between the previous temperature and the current temperature) The speed at which the abnormal temperature range spreads is obtained by the step of acquiring temperature information for each sensing element and the step of detecting the abnormal temperature based on the temperature information for each sensing element and determining the speed at which the abnormal temperature range is widened. Abnormal temperature detection classified according to the type is performed, and different types of alarms are issued according to the spreading speed.
温度検知部5から逐次入力される出力信号に基づいて、今回温度と経時温度差とからなる温度情報を検知素子毎に取得する工程について、図2のフローチャートを参照して説明する。
複数の赤外線検知素子(サーモパイル素子)からの検知信号をもとに、検知素子毎の温度情報を取得するにあたって、先ず初回の異常温度検知ルーチンであるか否かを判定し(ステップS1)、初回である場合(YES)、温度検知部5から入力された出力信号をもとに各検知素子(i=1〜I)の測定温度を取得して前回温度(t0[i])とした後(ステップS2)、異常温度の検知数をカウントしたTPHカウントをリセットする(ステップS3)。その後、温度検知部5から次に入力された出力信号をもとに各検知素子(i=1〜I)の今回温度(t1[i])を測定するとともに(ステップS4)、各検知素子の前回温度(t0[i])と今回温度(t1[i])の温度差(tdiff[i])を求める(ステップS5)。
初回のルーチンでない場合は(NO)、既に前回温度(t0[i])は取得済みなので、ステップ2を経ずにステップS3へ進み、その後、各検知素子の今回温度(t1[i])を測定するとともに(ステップS4)、各検知素子の前回温度(t0[i])と今回温度(t1[i])の温度差(tdiff[i])を求める(ステップS5)。
A process of acquiring temperature information including a current temperature and a time-dependent temperature difference for each detection element based on an output signal sequentially input from the
In acquiring temperature information for each detection element based on detection signals from a plurality of infrared detection elements (thermopile elements), it is first determined whether or not it is the first abnormal temperature detection routine (step S1). (YES), after acquiring the measured temperature of each detection element (i = 1 to I) based on the output signal input from the
If it is not the first routine (NO), since the previous temperature (t0 [i]) has already been acquired, the process proceeds to step S3 without passing through
なお、ステップS2の前回温度(t0[i])の測定や、ステップS4の今回温度(t1[i])の測定や、ステップS5の温度差(tdiff[i])の算出は、検知素子毎に繰り返して実行し、今回温度(t1[i])と経時温度差(tdiff[i])とからなる温度情報を検知素子毎(i=1〜I)に取得する。 The measurement of the previous temperature (t0 [i]) in step S2, the measurement of the current temperature (t1 [i]) in step S4, and the calculation of the temperature difference (tdiff [i]) in step S5 are performed for each sensing element. The temperature information consisting of the current temperature (t1 [i]) and the temperature difference with time (tdiff [i]) is acquired for each sensing element (i = 1 to I).
次に、前記検知素子毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定する工程について、図3のフローチャートを参照して説明する。
図3に示す異常温度検知方法によれば、まず複数の検知素子の中の1つをスキャン基準と設定し(ステップS6)、該スキャン基準とその1つ及び2つ隣の検知素子の温度情報をスキャンすることによって異常温度検知を行う。そして前記スキャン基準を1つずつ移動させながら検知素子全てをスキャンすることによって、検知領域全体の異常温度検知を行う(ステップS7〜S15)。
Next, the process of detecting the abnormal temperature based on the temperature information for each detection element and determining the speed at which the abnormal temperature range is expanded will be described with reference to the flowchart of FIG.
According to the abnormal temperature detection method shown in FIG. 3, first, one of a plurality of detection elements is set as a scan reference (step S6), and the temperature information of the scan reference and its one and two adjacent detection elements is set. The abnormal temperature is detected by scanning. Then, by scanning all the detection elements while moving the scan reference one by one, the abnormal temperature of the entire detection region is detected (steps S7 to S15).
スキャン基準の設定範囲は、全検知素子(i=1〜I)のうち両端各2素子(1,2,I−1,I)を除いた検知素子(3≦i≦I−2)とする。
図5(a)は、この実施例によるスキャン基準の設定範囲を図示したものである。この実施例では、8つの検知素子を1列に配列した一次元構成(8×1)の検知素子(i=1〜8)を使用するため、3≦i≦6の検知素子(ドット領域)をスキャン基準の設定範囲とし、前記スキャン基準を開始点に設定した後(i=3)、終止点(i=6)に至るまで、スキャン基準を1つずつ移動させてスキャン基準毎に異常温度検知を繰り返し実行する。
The scan reference setting range is a detection element (3 ≦ i ≦ I−2) excluding two elements (1, 2, I−1, I) at both ends of all the detection elements (i = 1 to I). .
FIG. 5A illustrates a scan reference setting range according to this embodiment. In this embodiment, since a detection element (i = 1 to 8) having a one-dimensional configuration (8 × 1) in which eight detection elements are arranged in a row is used, a detection element (dot region) of 3 ≦ i ≦ 6 is used. Is set as the scan reference range, the scan reference is set as the start point (i = 3), and the scan reference is moved one by one until reaching the end point (i = 6). Repeat detection.
この実施例では図3のフローチャートに示すように、まずスキャン基準を開始点に設定し(ステップS6)、当該スキャン基準とその1つ及び2つ隣の検知素子における今回温度をスキャンし、第1温度レベル(例えば45℃)以上の検知素子があるか否か判断するTPH検出を行い(ステップS7)、火災の危険性のある異常な温度変化が発生したか否かの検知を行う。
そしてTPH検出した場合(YES)、スキャン基準の1つ隣の検知素子における経時温度差をスキャンし、1つ隣の温度差が第1温度差レベル(例えば5℃)以上か否かを判定する第1温度差判定(ステップS8)を行う。
また前記1つ隣の温度差が第1温度差レベル以上の場合(YES)、さらにスキャン基準の2つ隣の検知素子における経時温度差をスキャンし、2つ隣の温度差が第2温度差レベル(例えば5℃)以上か否かを判定する第2温度差判定を行う(ステップS9)。
一方、前記1つ隣の温度差が第1温度差レベル未満の場合(NO)、スキャン基準とその1つ及び2つ隣の検知素子における今回温度をスキャンし、第2温度レベル(例えば80℃)以上の検知素子があるか否かを判断するTPH−C検出を行う(ステップS10)。
In this embodiment, as shown in the flowchart of FIG. 3, first, a scan reference is set as a start point (step S6), and the current temperature in the scan reference and its one and two adjacent detection elements is scanned. TPH detection is performed to determine whether or not there is a detection element having a temperature level (for example, 45 ° C.) or higher (step S7), and it is detected whether or not an abnormal temperature change with a risk of fire has occurred.
When TPH is detected (YES), the time-dependent temperature difference in the next detection element of the scan reference is scanned to determine whether the next temperature difference is equal to or higher than a first temperature difference level (for example, 5 ° C.). A first temperature difference determination (step S8) is performed.
If the adjacent temperature difference is equal to or higher than the first temperature difference level (YES), the temperature difference between the two adjacent detection elements of the scan reference is scanned, and the adjacent temperature difference is the second temperature difference. A second temperature difference determination is performed to determine whether or not the level (for example, 5 ° C.) or higher (step S9).
On the other hand, if the adjacent temperature difference is less than the first temperature difference level (NO), the scan reference and the current temperature in the one and two adjacent detection elements are scanned to obtain a second temperature level (for example, 80 ° C.). ) TPH-C detection is performed to determine whether or not there is the above detection element (step S10).
そして、前記第1温度差判定においてスキャン基準の1つの隣の検知素子の温度差が第1温度差レベル(例えば5℃)以上であり(YES)、かつ前記第2温度差判定においてスキャン基準の2つの隣の検知素子の温度差が第2温度差レベル(例えば5℃)以上である場合(YES)、TPH−A異常であると判断してTPH−Aカウントに1を加算する(ステップS11)。
また、前記第1温度差判定においてスキャン基準の1つの隣の検知素子の温度差が第1温度差レベル(例えば5℃)以上であるが(YES)、前記第2温度差判定においてスキャン基準の2つの隣の検知素子の温度差が第2温度差レベル(例えば5℃)未満である場合(NO)、TPH−B異常であると判断してTPH−Bカウントに1を加算する(ステップS12)。
一方、前記第1温度差判定においてスキャン基準の1つの隣の検知素子の温度差が第1温度差レベル(例えば5℃)未満であるが(NO)、TPH−C検出においてスキャン基準とその1つ及び2つ隣の検知素子の何れかにおいて第2温度レベル(例えば80℃)以上のものが検出された場合(YES)、TPH−C異常であると判断してTPH−Cカウントに1を加算する(ステップS13)。
In the first temperature difference determination, the temperature difference of one adjacent detection element of the scan reference is equal to or higher than a first temperature difference level (for example, 5 ° C.) (YES), and in the second temperature difference determination, the scan reference If the temperature difference between two adjacent sensing elements is equal to or higher than the second temperature difference level (for example, 5 ° C.) (YES), it is determined that TPH-A is abnormal and 1 is added to the TPH-A count (step S11). ).
Further, in the first temperature difference determination, the temperature difference of one adjacent sensing element of the scan reference is equal to or higher than a first temperature difference level (for example, 5 ° C.) (YES), but in the second temperature difference determination, the scan reference When the temperature difference between two adjacent sensing elements is less than the second temperature difference level (for example, 5 ° C.) (NO), it is determined that TPH-B is abnormal, and 1 is added to the TPH-B count (step S12). ).
On the other hand, in the first temperature difference determination, the temperature difference of one adjacent detection element of the scan reference is less than the first temperature difference level (for example, 5 ° C.) (NO), but in the TPH-C detection, the scan reference and its 1 If one of the two or two adjacent sensing elements detects a temperature equal to or higher than the second temperature level (for example, 80 ° C.) (YES), it is determined that the TPH-C is abnormal and the TPH-C count is set to 1. Add (step S13).
すなわち本発明による異常温度検知方法では、TPH検出の後、第1温度差判定と第2温度差判定とTPH−C検出とによって、異常温度の広がりが急激であるときのTPH−A異常検知(ステップS11)と、それほど広がりが急激ではないときのTPH−B異常検知(ステップS12)と、広がりは遅いが非常に高温であるときのTPH−C異常検知(ステップS13)との何れかを検知し、異常温度範囲が広がる速さに応じて種類分けした異常温度検知を行う。
そして、ステップS6で設定したスキャン基準(i=3)をもとに、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行った後、スキャン基準を次の検知素子(i=4)に移動させ(ステップS14)、今度はスキャン基準(i=4)をもとに、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行う(ステップS7〜S13)。
なおスキャン基準を次の検知素子に移動させた後(ステップS14)、スキャン基準の設定範囲を超えたか否か(i>(I−2))を判定し(ステップS15)、スキャン基準が設定範囲内である場合は(NO)、ステップ7に戻り、移動したスキャン基準をもとにステップS7〜S13による異常温度検知を実行する。
一方、移動したスキャン基準が設定範囲を超えた場合は(YES)、次処理(ステップ16)へ進む(図4のフローチャートを参照)。
That is, in the abnormal temperature detection method according to the present invention, after the TPH detection, the first temperature difference determination, the second temperature difference determination, and the TPH-C detection are performed to detect the TPH-A abnormality when the abnormal temperature spreads rapidly ( Detection of either step S11), TPH-B abnormality detection when the spread is not so rapid (step S12), or TPH-C abnormality detection when the spread is slow but very high (step S13) Then, abnormal temperature detection classified according to the speed at which the abnormal temperature range expands is performed.
Then, based on the scan reference (i = 3) set in step S6, after performing abnormal temperature detection classified according to the speed at which the abnormal temperature range spreads, the scan reference is set to the next detection element (i = 4) (step S14), this time, based on the scan reference (i = 4), abnormal temperature detection classified according to the speed at which the abnormal temperature range spreads is performed (steps S7 to S13).
After the scan reference is moved to the next detection element (step S14), it is determined whether or not the scan reference setting range is exceeded (i> (I-2)) (step S15), and the scan reference is within the setting range. If it is within the range (NO), the process returns to step 7, and the abnormal temperature detection in steps S7 to S13 is executed based on the moved scan reference.
On the other hand, when the moved scan reference exceeds the set range (YES), the process proceeds to the next process (step 16) (see the flowchart of FIG. 4).
なお図5(b)に、スキャン基準が開始点であるときの(i=3)、TPH検出及びTPH−C検出における今回温度のスキャン対象となる検知素子(斜線領域)と、第1温度差判定における経時温度差のスキャン対象となる検知素子(斜線領域)と、第2温度差判定とにおける経時温度差のスキャン対象となる検知素子(斜線領域)とを、それぞれ図示する。
また図5(c)に、スキャン基準を開始点から1つ移動させたときの(i=4)、TPH検出及びTPH−C検出における今回温度のスキャン対象となる検知素子(斜線領域)と、第1温度差判定における経時温度差のスキャン対象となる検知素子(斜線領域)と、第2温度差判定とにおける経時温度差のスキャン対象となる検知素子(斜線領域)とをそれぞれ図示する。
さらに図5(d)に、スキャン基準が終了点であるときの(i=6)、TPH検出及びTPH−C検出における今回温度のスキャン対象となる検知素子(斜線領域)と、第1温度差判定における経時温度差のスキャン対象となる検知素子(斜線領域)と、第2温度差判定とにおける経時温度差のスキャン対象となる検知素子(斜線領域)とをそれぞれ図示する。
In FIG. 5B, when the scan reference is the start point (i = 3), the detection element (shaded area) that is the target of scanning of the current temperature in TPH detection and TPH-C detection, and the first temperature difference A detection element (shaded area) that is a scan target of the temperature difference in the determination and a detection element (shaded area) that is the scan target of the temperature difference in the second temperature difference determination are respectively illustrated.
FIG. 5C shows a detection element (shaded area) that is a scan target of the current temperature in TPH detection and TPH-C detection when the scan reference is moved by one from the start point (i = 4). A detection element (shaded area) that is a scan target of the temporal temperature difference in the first temperature difference determination and a detection element (shaded area) that is the scan target of the temporal temperature difference in the second temperature difference determination are respectively illustrated.
Further, FIG. 5D shows a detection element (shaded area) to be scanned at the current temperature in the TPH detection and TPH-C detection when the scan reference is the end point (i = 6), and the first temperature difference. A detection element (shaded area) that is a scan target of a temporal temperature difference in the determination and a detection element (shaded area) that is a scan target of the temporal temperature difference in the second temperature difference determination are respectively illustrated.
スキャン基準を次に移動したときに、移動したスキャン基準が設定範囲を超えた場合、図4のフローチャートに示すように、TPH−Aカウントが1以上(tph−a≧1)であるか否かを判定することによってTPH−A異常があったか否かを判断し(ステップS16)、TPH−A異常検知がされた場合は出力部からTPH−A発報をするよう制御する(ステップS17)。
TPH−A異常検知がない場合は、TPH−Bカウントが1以上(tph−b≧1)であるか否かを判定することによってTPH−B異常があったか否かを判断し(ステップS18)、TPH−B異常検知がされた場合は出力部からTPH−B発報をするよう制御する(ステップS19)。
TPH−A異常検知もTPH−B異常検知もない場合は、TPH−Cカウントが1以上(tph−c≧1)であるか否かを判定することによってTPH−C異常があったか否かを判断し(ステップS20)、TPH−C異常検知がされた場合は出力部からTPH−C発報をするよう制御する(ステップS21)。
If the moved scan reference exceeds the set range when the scan reference is moved next, whether or not the TPH-A count is 1 or more (tph-a ≧ 1) as shown in the flowchart of FIG. Is determined (step S16), and when the TPH-A abnormality is detected, control is performed so that TPH-A is issued from the output unit (step S17).
If there is no TPH-A abnormality detection, it is determined whether there is a TPH-B abnormality by determining whether the TPH-B count is 1 or more (tph-b ≧ 1) (step S18). When the TPH-B abnormality is detected, control is performed so that TPH-B is issued from the output unit (step S19).
If neither TPH-A abnormality detection nor TPH-B abnormality detection is present, it is determined whether there is a TPH-C abnormality by determining whether the TPH-C count is 1 or more (tph-c ≧ 1). If the TPH-C abnormality is detected (step S20), control is performed so that TPH-C is issued from the output unit (step S21).
TPH−A異常検知、若しくはTPH−B異常検知、若しくはTPH−C異常検知がされた場合、それぞれ種類の異なる異常温度検知警報を発報し(TPH−A発報,TPH−B発報,TPH−C発報)、警備室に待機する警備員等に対して検知領域において異常な温度変化が発生したことを知らせる。なお前記異常温度検知警報は警備員等が待機する警備室等に出力するだけでなく、検知領域にも出力されるよう構成する。 When TPH-A abnormality detection, TPH-B abnormality detection, or TPH-C abnormality detection is performed, different types of abnormal temperature detection alarms are issued (TPH-A notification, TPH-B notification, TPH). -C alerting), informing the guards, etc. waiting in the security room that an abnormal temperature change has occurred in the detection area. The abnormal temperature detection alarm is output not only to a security room or the like where a guard or the like waits but also to a detection area.
そして、警備員等による異常温度検知警報の発報確認と、異常温度検知に対する解決処理(例えば、検知領域の監視映像確認や現場確認など)がなされ(ステップS22)、例えば警備員等によるリセット操作によって発報がリセットされた後(ステップS23)、制御部において検知素子毎の今回温度(t1[i])を前回温度(t0[i])として書換えることによって検知素子毎の前回温度を更新し(ステップS24)、異常温度検知を終了する。
なおTPH−A異常検知もTPH−B異常検知もTPH−C異常検知もない場合は、異常温度検知警報を発報せず、検知素子毎の前回温度を更新し(ステップS24)、異常温度検知を終了する。
Then, an alarm temperature detection alarm is confirmed by a security guard, etc., and a process for solving the abnormal temperature detection (for example, monitoring image confirmation of the detection area or on-site confirmation) is performed (step S22). After the alarm is reset by (step S23), the previous temperature for each sensing element is updated by rewriting the current temperature (t1 [i]) for each sensing element as the previous temperature (t0 [i]) in the control unit. (Step S24), and the abnormal temperature detection is terminated.
If there is no TPH-A abnormality detection, TPH-B abnormality detection, or TPH-C abnormality detection, the abnormal temperature detection alarm is not issued, the previous temperature for each detection element is updated (step S24), and the abnormal temperature detection is performed. finish.
そして、制御部において一定周期ごとに、検知素子毎の温度情報を取得するとともに(図2)、前記検知素子毎の温度情報に基づいて異常温度範囲の広がる速さに応じて種類分けした異常温度検知(TPH−A異常検知,TPH−B異常検知,TPH−C異常検知)を行い(図3)、それぞれ種類の異なる異常温度検知警報を発報(TPH−A発報,TPH−B発報,TPH−C発報)することによって(図4)、検知領域の異常温度を検知し、警報を発報する。
なお、TPH検出における第1温度レベル(tph)や、TPH−C検出における第2温度レベル(tph−c)や、第1温度差判定における第1温度差レベル(tph−ab)や、第2温度差判定における第2温度差レベル(tph−bc)を、それぞれ調整することによって、検知感度を調整することができる。例えば、第1温度差判定における第1温度差レベル(tph−ab)や、第2温度差判定における第2温度差レベル(tph−bc)を調整することによって、異常温度範囲の広がる速さの度合いを調整して異常温度検知することができる。
Then, the control unit obtains temperature information for each detection element at regular intervals (FIG. 2), and classifies the abnormal temperature according to the speed at which the abnormal temperature range spreads based on the temperature information for each detection element. Detection (TPH-A abnormality detection, TPH-B abnormality detection, TPH-C abnormality detection) (Figure 3), and different types of abnormal temperature detection alarms are issued (TPH-A issuance, TPH-B issuance) , TPH-C) (FIG. 4), an abnormal temperature in the detection area is detected and an alarm is issued.
Note that the first temperature level (tph) in the TPH detection, the second temperature level (tph-c) in the TPH-C detection, the first temperature difference level (tph-ab) in the first temperature difference determination, the second The detection sensitivity can be adjusted by adjusting the second temperature difference level (tph-bc) in the temperature difference determination. For example, by adjusting the first temperature difference level (tph-ab) in the first temperature difference determination and the second temperature difference level (tph-bc) in the second temperature difference determination, the speed of the abnormal temperature range can be increased. The abnormal temperature can be detected by adjusting the degree.
このように本発明の異常温度検知方法によれば、検知素子毎の温度情報(今回温度と経時温度差)に基づいて異常温度を検出するとともに異常温度範囲が広がる速さを判定し、異常温度範囲の広がる速さに応じて異なる種類の警報を発報するため(TPH−A発報、TPH−B発報、TPH−C発報)、炎の存在の有無にかかわらず、火災発生の危険度に対応した警報を発報することができ火災発生の危険性も知らせることができ、性能の高い異常温度の検知・警報をすることができる。 As described above, according to the abnormal temperature detection method of the present invention, the abnormal temperature is detected based on the temperature information for each detection element (current temperature and time-dependent temperature difference), and the speed at which the abnormal temperature range is expanded is determined. Risk of fire occurrence regardless of the presence or absence of flames, in order to issue different types of alarms according to the speed of expansion of the range (TPH-A, TPH-B, and TPH-C) A warning corresponding to the degree can be issued, the danger of a fire can be informed, and an abnormal temperature with high performance can be detected and alarmed.
次に図6から図9を参照して本発明の第2実施例による異常温度検知方法について説明する。 Next, an abnormal temperature detection method according to the second embodiment of the present invention will be described with reference to FIGS.
第2実施例では、図9に示すように、8つの赤外線検知素子(サーモパイル素子)を8列に配列した二次元構成(i,j)の赤外線検知素子(i=1〜I,j=1〜J)を使用した異常温度検知装置10によって検知領域の異常温度を検知する。
そして64の赤外線検知素子〔8×8〕によって、検知領域を64の区画〔8×8〕に区切るようにして各区画毎の検知信号がそれぞれ出力され、検知領域の区画毎に温度情報を取得する。つまりこの実施例でも、第1実施例と同様に、各検知素子の座標値が検知領域の各区画の座標値に対応する。従って、各検知素子から出力される検知信号をもとに取得した温度情報を各検知素子毎に解析することによって、検知領域の各区画毎に温度情報を取得し、当該温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定することができる。
この実施例では、検知領域からの赤外線を受光してその受光量に応じた出力レベルの検知信号を出力する赤外線検知素子(i=1〜8,j=1〜8)によって検知領域を区画毎に温度測定し、前記検知素子毎の温度情報に基づいて検知領域の異常温度を検知し、異常温度検知警報を発報する異常温度検知方法において、第1実施例と同様に、今回温度と経時温度差(前回温度と今回温度との温度差)とからなる温度情報を検知素子毎に取得する工程と、前記検知素子毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定する工程とによって、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行い、その広がる速さに応じて種類の異なる警報を発報する。
In the second embodiment, as shown in FIG. 9, the infrared detection elements (i = 1 to I, j = 1) having a two-dimensional configuration (i, j) in which eight infrared detection elements (thermopile elements) are arranged in eight rows. ~ J) is used to detect an abnormal temperature in the detection region by the abnormal
The 64 infrared detection elements [8 × 8] output detection signals for each section so that the detection area is divided into 64 sections [8 × 8], and temperature information is acquired for each section of the detection area. To do. That is, in this embodiment as well, as in the first embodiment, the coordinate value of each detection element corresponds to the coordinate value of each section of the detection region. Therefore, by analyzing the temperature information acquired based on the detection signal output from each detection element for each detection element, the temperature information is acquired for each section of the detection region, and abnormalities are detected based on the temperature information. It is possible to detect the temperature and determine the speed at which the abnormal temperature range is widened.
In this embodiment, the detection region is divided into sections by infrared detection elements (i = 1 to 8, j = 1 to 8) that receive infrared rays from the detection region and output detection signals having output levels corresponding to the received light amount. In the abnormal temperature detection method for detecting an abnormal temperature in the detection region based on the temperature information for each detection element and issuing an abnormal temperature detection alarm, the temperature and time-lapse are detected as in the first embodiment. A step of acquiring temperature information consisting of a temperature difference (temperature difference between the previous temperature and the current temperature) for each sensing element, and a speed at which an abnormal temperature is detected and the abnormal temperature range is expanded based on the temperature information for each sensing element. The abnormal temperature detection classified according to the speed at which the abnormal temperature range spreads is performed by the step of determining the thickness, and different types of alarms are issued according to the spread speed.
温度検知部5から逐次入力される出力信号に基づいて、今回温度と経時温度差とからなる温度情報を検知素子毎に取得する工程について、図6のフローチャートを参照して説明する。
複数の赤外線検知素子(サーモパイル素子)からの検知信号をもとに、検知素子毎の温度情報を取得するにあたって、第1実施例と同様に、先ず初回の異常温度検知ルーチンであるか否かを判定し(ステップS31)、初回である場合(YES)、温度検知部5から入力された出力信号をもとに各検知素子((i,j)、i=1〜I,j=1〜J)の測定温度を取得して前回温度(t0[i,j])とした後(ステップS32)、異常温度の検知数をカウントしたTPHカウントをリセットする(ステップS33)。その後、温度検知部5から次に入力された出力信号をもとに各検知素子の今回温度(t1[i,j])を測定するとともに(ステップS34)、各検知素子の前回温度(t0[i,j])と今回温度(t1[i,j])の温度差(tdiff[i,j])を求める(ステップS35)。
初回のルーチンでない場合は(NO)、既に前回温度(t0[i,j])は取得済みなので、ステップ32を経ずにステップS33へ進み、その後、各検知素子の今回温度(t1[i,j])を測定するとともに(ステップS34)、各検知素子の前回温度(t0[i,j])と今回温度(t1[i,j])の温度差(tdiff[i,j])を求める(ステップS35)。
A process of acquiring temperature information including a current temperature and a time-dependent temperature difference for each detection element based on an output signal sequentially input from the
When acquiring temperature information for each detection element based on detection signals from a plurality of infrared detection elements (thermopile elements), first, whether or not it is the first abnormal temperature detection routine, as in the first embodiment. If it is determined (step S31) and it is the first time (YES), each detection element ((i, j), i = 1 to I, j = 1 to J based on the output signal input from the
If it is not the first routine (NO), since the previous temperature (t0 [i, j]) has already been acquired, the process proceeds to step S33 without passing through step 32, and then the current temperature (t1 [i, j,) of each detection element. j]) (step S34), and the temperature difference (tdiff [i, j]) between the previous temperature (t0 [i, j]) and the current temperature (t1 [i, j]) of each sensing element is obtained. (Step S35).
なお、ステップS32の前回温度(t0[i,j])の測定や、ステップS34の今回温度(t1[i,j])の測定や、ステップS35の温度差(tdiff[i,j])の算出は、検知素子毎に繰り返して実行し、今回温度(t1[i,j])と経時温度差(tdiff[i,j])とからなる温度情報を検知素子毎((i,j)、i=1〜I,j=1〜J)に取得する。 Note that the previous temperature (t0 [i, j]) in step S32, the current temperature (t1 [i, j]) in step S34, and the temperature difference (tdiff [i, j]) in step S35 are measured. The calculation is repeatedly performed for each sensing element, and temperature information including the current temperature (t1 [i, j]) and the temperature difference (tdiff [i, j]) is detected for each sensing element ((i, j), i = 1 to I, j = 1 to J).
次に、前記検知素子毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定する工程について、図7のフローチャートを参照して説明する。
第2実施例による異常温度検知でも第1実施例と同様に、まず複数の検知素子の中の1つをスキャン基準と設定し(ステップS36)、該スキャン基準とその1つ及び2つ隣の検知素子の温度情報をスキャンすることによって異常温度検知を行う。そして前記スキャン基準を1つずつ移動させながら検知素子全てをスキャンすることによって、検知領域全体の異常温度検知を行う(ステップS37〜S45)。
Next, the process of detecting the abnormal temperature based on the temperature information for each detection element and determining the speed at which the abnormal temperature range widens will be described with reference to the flowchart of FIG.
Even in the abnormal temperature detection according to the second embodiment, similarly to the first embodiment, one of the plurality of detection elements is set as a scan reference (step S36), and the scan reference and one and two adjacent ones thereof are set. Abnormal temperature detection is performed by scanning the temperature information of the detection element. Then, by scanning all the detection elements while moving the scan reference one by one, the abnormal temperature of the entire detection region is detected (steps S37 to S45).
スキャン基準の設定範囲は、全検知素子((i,j)、i=1〜I,j=1〜J)のうち周囲各2素子を除いた検知素子(3≦i≦I−2,3≦j≦J−2)とする。
図9(a)は、この実施例によるスキャン基準の設定範囲を図示したものである。この実施例では、8つの検知素子を8列に配列した二次元構成(8×8)の検知素子(i,j)を使用するため、3≦i≦6かつ3≦j≦6の検知素子(ドット領域)をスキャン基準の設定範囲とし、前記スキャン基準を開始点に設定した後((i,j)=(3,3))、終止点((i,j)=(6,6))に至るまで、スキャン基準を1つずつ移動させてスキャン基準毎に異常温度検知を繰り返し実行する。
The setting range of the scan reference is a detection element (3 ≦ i ≦ I−2, 3) excluding two surrounding elements among all the detection elements ((i, j), i = 1 to I, j = 1 to J). ≦ j ≦ J-2).
FIG. 9A illustrates a scan reference setting range according to this embodiment. In this embodiment, since a detection element (i, j) having a two-dimensional configuration (8 × 8) in which eight detection elements are arranged in eight rows is used, the detection elements satisfying 3 ≦ i ≦ 6 and 3 ≦ j ≦ 6 After setting the (dot area) as the scan reference setting range and setting the scan reference as the start point ((i, j) = (3, 3)), the end point ((i, j) = (6, 6) ), The scan reference is moved one by one, and the abnormal temperature detection is repeatedly executed for each scan reference.
この実施例では図7のフローチャートに示すように、まずスキャン基準を開始点((i,j)=(3,3))に設定し(ステップS36)、当該スキャン基準とその1つ及び2つ隣の検知素子における今回温度をスキャンし、第1温度レベル(例えば45℃)以上の検知素子があるか否か判断するTPH検出を行い(ステップS37)、火災の危険性のある異常な温度変化が発生したか否かの検知を行う。
そしてTPH検出した場合(YES)、スキャン基準の1つ隣の検知素子における経時温度差をスキャンし、1つ隣の温度差が第1温度差レベル(例えば5℃)以上か否かを判定する第1温度差判定(ステップS38)を行う。
また前記1つ隣の温度差が第1温度差レベル以上の場合(YES)、さらにスキャン基準の2つ隣の検知素子における経時温度差をスキャンし、2つ隣の温度差が第2温度差レベル(例えば5℃)以上か否かを判定する第2温度差判定を行う(ステップS39)。
一方、前記1つ隣の温度差が第1温度差レベル未満の場合(NO)、スキャン基準とその1つ及び2つ隣の検知素子における今回温度をスキャンし、第2温度レベル(例えば80℃)以上の検知素子があるか否かを判断するTPH−C検出を行う(ステップS40)。
In this embodiment, as shown in the flowchart of FIG. 7, first, the scan reference is set to the start point ((i, j) = (3, 3)) (step S36), and the scan reference and one and two of the scan references are set. Scan the current temperature in the adjacent sensing element and perform TPH detection to determine whether there is a sensing element of the first temperature level (for example, 45 ° C.) or higher (step S37), and an abnormal temperature change with a risk of fire Detection of whether or not has occurred.
When TPH is detected (YES), the time-dependent temperature difference in the next detection element of the scan reference is scanned to determine whether the next temperature difference is equal to or higher than a first temperature difference level (for example, 5 ° C.). A first temperature difference determination (step S38) is performed.
If the adjacent temperature difference is equal to or higher than the first temperature difference level (YES), the temperature difference between the two adjacent detection elements of the scan reference is scanned, and the adjacent temperature difference is the second temperature difference. A second temperature difference determination is performed to determine whether or not the level (for example, 5 ° C.) or higher (step S39).
On the other hand, if the adjacent temperature difference is less than the first temperature difference level (NO), the scan reference and the current temperature in the one and two adjacent detection elements are scanned to obtain a second temperature level (for example, 80 ° C.). ) TPH-C detection is performed to determine whether or not there is the above detection element (step S40).
そして第1実施例と同様に、異常温度の広がりが急激であるときのTPH−A異常検知(ステップS41)と、それほど広がりが急激ではないときのTPH−B異常検知(ステップS42)と、広がりは遅いが非常に高温であるときのTPH−C異常検知(ステップS43)との何れかを検知し、異常温度範囲が広がる速さに応じて種類分けした異常温度検知を行う。
その後、ステップS36で設定したスキャン基準((i,j)=(3,3))を次の検知素子((i,j)=(4,3))に移動させ(ステップS44)、今度は移動したスキャン基準((i,j)=(4,3))をもとに、異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行う(ステップS37〜S43)。
なおスキャン基準を次の検知素子に移動させた後(ステップS44)、スキャン基準の設定範囲を超えたか否か(i>(I−2) and j>(J−2))を判定し(ステップS45)、スキャン基準が設定範囲内である場合は(NO)、ステップ37に戻り、移動したスキャン基準をもとにステップS37〜S43による異常温度検知を実行する。
一方、移動したスキャン基準が設定範囲を超えた場合は(YES)、次処理(ステップ46)へ進む(図8のフローチャートを参照)。
As in the first embodiment, the TPH-A abnormality detection (step S41) when the abnormal temperature spread is abrupt, the TPH-B abnormality detection (step S42) when the spread is not so rapid, and the spread. The TPH-C abnormality detection (step S43) when the temperature is slow but very high is detected, and abnormal temperature detection is performed according to the speed at which the abnormal temperature range is expanded.
Thereafter, the scan reference ((i, j) = (3,3)) set in step S36 is moved to the next detection element ((i, j) = (4,3)) (step S44), this time. Based on the moved scan reference ((i, j) = (4,3)), abnormal temperature detection classified according to the speed at which the abnormal temperature range is expanded is performed (steps S37 to S43).
After the scan reference is moved to the next detection element (step S44), it is determined whether or not the scan reference setting range is exceeded (i> (I-2) and j> (J-2)) (step S44). S45) If the scan reference is within the set range (NO), the process returns to step 37, and abnormal temperature detection in steps S37 to S43 is executed based on the moved scan reference.
On the other hand, if the moved scan reference exceeds the set range (YES), the process proceeds to the next process (step 46) (see the flowchart of FIG. 8).
なお図9(b)に、スキャン基準が開始点であるときの((i,j)=(3,3))、TPH検出及びTPH−C検出における今回温度のスキャン対象となる検知素子(斜線領域)と、第1温度差判定における経時温度差のスキャン対象となる検知素子(斜線領域)と、第2温度差判定とにおける経時温度差のスキャン対象となる検知素子(斜線領域)とを、それぞれ図示する。
また図9(c)に、スキャン基準が終了点であるときの((i,j)=(6,6))、TPH検出及びTPH−C検出における今回温度のスキャン対象となる検知素子(斜線領域)と、第1温度差判定における経時温度差のスキャン対象となる検知素子(斜線領域)と、第2温度差判定とにおける経時温度差のスキャン対象となる検知素子(斜線領域)とをそれぞれ図示する。
In FIG. 9B, when the scan reference is the start point ((i, j) = (3, 3)), the detection element (diagonal line) to be scanned for the current temperature in TPH detection and TPH-C detection. Area), a detection element (shaded area) that is a scan target of the temporal temperature difference in the first temperature difference determination, and a detection element (shaded area) that is the scan target of the temporal temperature difference in the second temperature difference determination, Each is illustrated.
Further, FIG. 9C shows a detection element (diagonal line) to be scanned at the current temperature in TPH detection and TPH-C detection when the scan reference is the end point ((i, j) = (6,6)). Area), a detection element (shaded area) that is a scan target of the temporal temperature difference in the first temperature difference determination, and a detection element (shaded area) that is the scan target of the temporal temperature difference in the second temperature difference determination, respectively Illustrated.
スキャン基準を次に移動したときに、移動したスキャン基準が設定範囲を超えた場合、図8のフローチャートに示すように、TPH−Aカウントが1以上(tph−a≧1)であるか否かを判定することによってTPH−A異常があったか否かを判断し(ステップS46)、TPH−A異常検知がされた場合は出力部からTPH−A発報をするよう制御する(ステップS47)。
TPH−A異常検知がない場合は、TPH−Bカウントが1以上(tph−b≧1)であるか否かを判定することによってTPH−B異常があったか否かを判断し(ステップS48)、TPH−B異常検知がされた場合は出力部からTPH−B発報をするよう制御する(ステップS49)。
TPH−A異常検知もTPH−B異常検知もない場合は、TPH−Cカウントが1以上(tph−c≧1)であるか否かを判定することによってTPH−C異常があったか否かを判断し(ステップS50)、TPH−C異常検知がされた場合は出力部からTPH−C発報をするよう制御する(ステップS51)。
If the moved scan reference exceeds the set range when the scan reference is moved next, whether the TPH-A count is 1 or more (tph-a ≧ 1) as shown in the flowchart of FIG. Is determined (step S46), and when the TPH-A abnormality is detected, the TPH-A is controlled to be issued from the output unit (step S47).
If there is no TPH-A abnormality detection, it is determined whether there is a TPH-B abnormality by determining whether the TPH-B count is 1 or more (tph-b ≧ 1) (step S48), When the TPH-B abnormality is detected, control is performed so that TPH-B is issued from the output unit (step S49).
If neither TPH-A abnormality detection nor TPH-B abnormality detection is present, it is determined whether there is a TPH-C abnormality by determining whether the TPH-C count is 1 or more (tph-c ≧ 1). If the TPH-C abnormality is detected (step S50), control is performed so that TPH-C is issued from the output unit (step S51).
第1実施例と同様に、TPH−A異常検知、若しくはTPH−B異常検知、若しくはTPH−C異常検知がされた場合、それぞれ種類の異なる異常温度検知警報を発報し(TPH−A発報,TPH−B発報,TPH−C発報)、警備室に待機する警備員等に対して検知領域において異常な温度変化が発生したことを知らせる。なお前記異常温度検知警報は警備員等が待機する警備室等に出力するだけでなく、検知領域にも出力されるよう構成する。 Similarly to the first embodiment, when TPH-A abnormality detection, TPH-B abnormality detection, or TPH-C abnormality detection is performed, different types of abnormal temperature detection alarms are issued (TPH-A notification). , TPH-B notification, TPH-C notification), a security guard standing by in the security room, etc., is notified that an abnormal temperature change has occurred in the detection area. The abnormal temperature detection alarm is output not only to a security room or the like where a guard or the like waits but also to a detection area.
そして、警備員等による異常温度検知警報の発報確認と、異常温度検知に対する解決処理(例えば、検知領域の監視映像確認や現場確認など)がなされ(ステップS52)、例えば警備員等によるリセット操作によって発報がリセットされた後(ステップS53)、制御部において検知素子毎の今回温度(t1[i,j])を前回温度(t0[i,j])として書換えることによって検知素子毎の前回温度を更新し(ステップS54)、異常温度検知を終了する。
なおTPH−A異常検知もTPH−B異常検知もTPH−C異常検知もない場合は、異常温度検知警報を発報せず、検知素子毎の前回温度を更新し(ステップS54)、異常温度検知を終了する。
Then, an alarm temperature detection alarm is confirmed by a security guard, etc., and a processing for solving the abnormal temperature detection (for example, monitoring image confirmation of the detection area, on-site confirmation, etc.) is performed (step S52). (Step S53), the control unit rewrites the current temperature (t1 [i, j]) for each detection element as the previous temperature (t0 [i, j]) in the control unit. The previous temperature is updated (step S54), and the abnormal temperature detection is terminated.
If there is no TPH-A abnormality detection, TPH-B abnormality detection, or TPH-C abnormality detection, the abnormal temperature detection alarm is not issued, the previous temperature for each detection element is updated (step S54), and the abnormal temperature detection is performed. finish.
そして第1実施例と同様に、制御部において一定周期ごとに、検知素子毎の温度情報を取得するとともに(図6)、前記検知素子毎の温度情報に基づいて異常温度範囲の広がる速さに応じて種類分けした異常温度検知(TPH−A異常検知,TPH−B異常検知,TPH−C異常検知)を行い(図7)、それぞれ種類の異なる異常温度検知警報を発報(TPH−A発報,TPH−B発報,TPH−C発報)することによって(図8)、検知領域の異常温度を検知する。 As in the first embodiment, the control unit obtains temperature information for each sensing element at regular intervals (FIG. 6), and at a speed at which the abnormal temperature range spreads based on the temperature information for each sensing element. Abnormal temperature detection (TPH-A abnormality detection, TPH-B abnormality detection, TPH-C abnormality detection) classified according to type is performed (Fig. 7), and different types of abnormal temperature detection alarms are issued (TPH-A issuance). The abnormal temperature in the detection region is detected by performing the notification, the TPH-B notification, and the TPH-C notification (FIG. 8).
1 集光レンズ
2 光学フィルタ
3 赤外線検知素子
4 増幅部
5 温度検知部
6 制御部
7 出力部
10 異常温度検知装置
DESCRIPTION OF
Claims (3)
温度検知部(5)から逐次入力される出力信号に基づいて制御部(6)は、検知領域の区画毎に今回温度と経時温度差とからなる温度情報を取得し、さらに各区画毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定するにあたって、
複数の区画の中の1つをスキャン基準とし、
スキャン基準とその1つ及び2つ隣の区画における今回温度をスキャンし、第1温度レベルを超える区画を検出した場合に、そのスキャン基準の1つ隣の区画における経時温度差をスキャンし、第1温度差レベルを超えるか否かを判定する第1温度差判定を行い、前記1つ隣の区画における経時温度差が第1温度差レベルを超える場合にスキャン基準の2つ隣の区画における経時温度差をスキャンし、第2温度差レベルを超えるか否かを判定する第2温度差判定を行い、前記1つ隣の区画における経時温度差が前記第2温度差レベル以上である場合に異常温度範囲の広がりが急激であるTPH−A異常と判断し、前記1つ隣の区画における経時温度差が前記第2温度差レベル未満である場合に広がりが急激でないTPH−B異常と判断するとともに、
前記1つ隣の区画における経時温度差が第1温度差レベル未満の場合にスキャン基準とその1つ及び2つ隣の区画における今回温度をスキャンし、その1つ及び2つ隣の区画の何れかにおいて第2温度レベルを超えている場合に、異常温度範囲の広がりは遅いが非常に高温であるTPH−C異常と判断し、
異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行い、その広がる速さに応じて種類の異なる警報を発報するよう出力部(7)を制御することを特徴とする異常温度検知装置。 An infrared detection element (3) that receives infrared rays from the detection region and outputs a detection signal having an output level corresponding to the amount of the received light, and for each section of the detection region based on the detection signal output from the infrared detection element A temperature detection unit (5) that acquires a measured temperature, a control unit (6) that detects an abnormal temperature in the detection region based on an output signal from the temperature detection unit, and an abnormal temperature that is controlled by the control unit (6) In the abnormal temperature detection device (10) composed of the output unit (7) that issues a detection alarm,
Based on the output signal sequentially input from the temperature detection unit (5), the control unit (6) acquires temperature information including the current temperature and the temperature difference with time for each section of the detection area, and further, the temperature for each section. in determining the rate spread abnormal temperature range while detecting the abnormal temperature on the basis of the information,
One of the multiple sections is used as the scan reference,
When the current temperature in the scan reference and its one and two adjacent compartments is scanned and a compartment that exceeds the first temperature level is detected, the temperature difference with time in the next neighbor of the scan reference is scanned, A first temperature difference determination is performed to determine whether or not one temperature difference level is exceeded, and when the time-dependent temperature difference in the one adjacent section exceeds the first temperature difference level, the time lapse in the two adjacent sections of the scan reference A temperature difference is scanned, a second temperature difference determination is performed to determine whether or not the second temperature difference level is exceeded, and an abnormality occurs when the temperature difference with time in the next adjacent section is equal to or greater than the second temperature difference level When it is determined that the TPH-A abnormality has a rapid expansion of the temperature range, and when the time-dependent temperature difference in the next adjacent section is less than the second temperature difference level, it is determined that the TPH-B abnormality has a non-rapid expansion. Moni,
When the temperature difference with time in the one adjacent section is less than the first temperature difference level, the scan reference and the current temperature in the one and two adjacent sections are scanned, and either of the one or two adjacent sections is scanned. When the temperature exceeds the second temperature level, it is determined that the abnormal temperature range has a slow but very high TPH-C abnormality,
Detecting abnormal temperatures classified according to the speed at which the abnormal temperature range expands, and controlling the output unit (7) to issue different types of alarms according to the speed at which the abnormal temperature range expands Detection device.
前記第1温度差レベルが5℃であり、The first temperature difference level is 5 ° C .;
前記第2温度差レベルが5℃であり、The second temperature difference level is 5 ° C .;
かつ前記第2温度レベルが80℃であることを特徴とする請求項1記載の異常温度検知方法。2. The abnormal temperature detection method according to claim 1, wherein the second temperature level is 80.degree.
検知領域の区画毎に今回温度と経時的温度差とからなる温度情報を取得する工程と、
前記各区画毎の温度情報に基づいて異常温度を検知するとともに異常温度範囲が広がる速さを判定する工程とによって、複数の区画に区切られた検知領域の各区画毎の温度情報に基づいて、異常温度を検知するとともに異常温度範囲が広がる速さを判定するにあたって、
複数の区画の中の1つをスキャン基準とし、
スキャン基準とその1つ及び2つ隣の区画における今回温度をスキャンし、第1温度レベルを超える区画を検出した場合に、そのスキャン基準の1つ隣の区画における経時温度差をスキャンし、第1温度差レベルを超えるか否かを判定する第1温度差判定を行い、前記1つ隣の区画における経時温度差が第1温度差レベルを超える場合にスキャン基準の2つ隣の区画における経時温度差をスキャンし、第2温度差レベルを超えるか否かを判定する第2温度差判定を行い、前記1つ隣の区画における経時温度差が前記第2温度差レベル以上である場合に異常温度範囲の広がりが急激であるTPH−A異常と判断し、前記1つ隣の区画における経時温度差が前記第2温度差レベル未満である場合に広がりが急激でないTPH−B異常と判断するとともに、
前記1つ隣の区画における経時温度差が第1温度差レベル未満の場合にスキャン基準とその1つ及び2つ隣の区画における今回温度をスキャンし、その1つ及び2つ隣の区画の何れかにおいて第2温度レベルを超えている場合に、異常温度範囲の広がりは遅いが非常に高温であるTPH−C異常と判断し、
異常温度範囲の広がる速さに応じて種類分けした異常温度検知を行い、その広がる速さに応じて種類の異なる警報を発報することを特徴とする異常温度検知方法。
The temperature of the detection area is measured for each section by an infrared detector that receives infrared light from the detection area and outputs a detection signal with an output level corresponding to the amount of light received, and abnormalities in the detection area based on temperature information for each section In the abnormal temperature detection method that detects the temperature and issues an abnormal temperature detection alarm,
Obtaining temperature information consisting of the current temperature and the temperature difference over time for each section of the detection area;
Based on the temperature information for each section of the detection area divided into a plurality of sections, by detecting the abnormal temperature based on the temperature information for each section and determining the speed at which the abnormal temperature range expands , In detecting the abnormal temperature and determining the speed at which the abnormal temperature range expands,
One of the multiple sections is used as the scan reference,
Scans temperature this time at the scan reference and its one and two neighboring compartments, when detecting a compartment exceeds a first temperature level, scanning the aging temperature difference at one adjacent compartment of the scan reference, the A first temperature difference determination is performed to determine whether or not one temperature difference level is exceeded , and when the time-dependent temperature difference in the one adjacent section exceeds the first temperature difference level, the time lapse in the two adjacent sections of the scan reference A temperature difference is scanned, a second temperature difference determination is performed to determine whether or not the second temperature difference level is exceeded , and an abnormality occurs when the temperature difference with time in the next adjacent section is equal to or greater than the second temperature difference level spread of the temperature range is determined to TPH-a abnormal is abrupt, the determining one time difference in temperature compartment next to spread is less than the second temperature difference level is not abrupt TPH-B abnormal result Moni,
When the temperature difference with time in the one adjacent section is less than the first temperature difference level, the scan reference and the current temperature in the one and two adjacent sections are scanned, and either of the one or two adjacent sections is scanned. second if the temperature level Ru Tei exceeded, spread of abnormal temperature range slower determines that TPH-C abnormality is very hot in pressure,
It performs abnormal temperature detection that type divided according to the speed of extension of the abnormal temperature range, abnormal temperature detecting how to characterized in that alarm different types of alarms depending on the speed with which the spreading.
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