JP6872685B2 - Infrared detector - Google Patents

Infrared detector Download PDF

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JP6872685B2
JP6872685B2 JP2017077974A JP2017077974A JP6872685B2 JP 6872685 B2 JP6872685 B2 JP 6872685B2 JP 2017077974 A JP2017077974 A JP 2017077974A JP 2017077974 A JP2017077974 A JP 2017077974A JP 6872685 B2 JP6872685 B2 JP 6872685B2
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infrared sensor
infrared
angle
measured
detection device
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JP2018179694A (en
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勲 服部
勲 服部
浩 山中
山中　　浩
杉山　貴則
貴則 杉山
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Panasonic Intellectual Property Management Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers

Description

本発明は、人などの被測定対象の温度を非接触で検出する赤外線検出装置に関する。 The present invention relates to an infrared detection device that non-contactly detects the temperature of an object to be measured such as a person.

従来の赤外線検出装置は、熱源が特定された位置へ赤外線検出装置を駆動させて人体か否かを判断していた。（特許文献１） In the conventional infrared detection device, the infrared detection device is driven to a position where the heat source is specified to determine whether or not it is a human body. (Patent Document 1)

特許第５２４０２７１号公報Japanese Patent No. 5240271

しかしながら、上記従来の赤外線検出装置では、熱源が複数個ある場合や、熱源が移動する場合には十分に対応できないという課題があった。 However, the above-mentioned conventional infrared detection device has a problem that it cannot sufficiently cope with the case where there are a plurality of heat sources or when the heat sources move.

本発明は、上記課題を解決し、熱源が複数個ある場合や、熱源が移動する場合でも十分に対応可能な赤外線検出装置を提供することを目的とする。 An object of the present invention is to solve the above problems and to provide an infrared detection device that can sufficiently cope with a case where there are a plurality of heat sources or a case where the heat sources move.

上記課題を解決するために本発明は、被測定対象の赤外線を検出する赤外線センサと、前記赤外線センサを一方向と一方向とは反対の他方向に回動走査する走査部とを有し、前記赤外線センサは、一方向へ回動するときは第１の角度回動するごとに赤外線の検出を行い、他方向へ回動するときは第２の角度回動するごとに赤外線の検出を行い、前記第１の角度よりも前記第２の角度の方が大きい構成とした。 In order to solve the above problems, the present invention includes an infrared sensor that detects infrared rays to be measured, and a scanning unit that rotates and scans the infrared sensor in one direction and in the other direction opposite to one direction. When the infrared sensor rotates in one direction, it detects infrared rays every time it rotates in the first angle, and when it rotates in the other direction, it detects infrared rays every time it rotates in a second angle. The second angle is larger than the first angle.

本発明の空調制御装置は、熱源が複数個ある場合や熱源が移動する場合でも、効率良く赤外線検出装置によって被測定対象の赤外線を検出することができる。 The air conditioning control device of the present invention can efficiently detect infrared rays to be measured by an infrared ray detecting device even when there are a plurality of heat sources or the heat sources move.

実施の形態１の赤外線検出装置の構成を示すブロック図The block diagram which shows the structure of the infrared ray detection apparatus of Embodiment 1. 同赤外線検出装置の外観を示す図The figure which shows the appearance of the infrared detector 同赤外線センサの一方向への回動を示す図The figure which shows the rotation of the infrared sensor in one direction 同赤外線センサの他方向への回動を示す図The figure which shows the rotation of the infrared sensor in the other direction. 実施の形態２の赤外線検出装置の構成を示すブロック図A block diagram showing the configuration of the infrared detection device according to the second embodiment. 実施の形態３の赤外線検出装置の構成を示すブロック図A block diagram showing the configuration of the infrared detection device according to the third embodiment. 実施の形態４の赤外線検出装置の構成を示すブロック図A block diagram showing the configuration of the infrared detection device according to the fourth embodiment. 同赤外線検出装置の一方向への回動を示す図The figure which shows the rotation of the infrared ray detection device in one direction. 同赤外線検出装置の他方向への回動を示す図The figure which shows the rotation of the infrared detector device in the other direction. 同赤外線検出装置の他方向への回動を示す図The figure which shows the rotation of the infrared detector device in the other direction.

（実施の形態１）
以下に、実施の形態１における赤外線検出装置について図面を用いながら説明する。 (Embodiment 1)
Hereinafter, the infrared detection device according to the first embodiment will be described with reference to the drawings.

図１は実施の形態１の赤外線検出装置の構成を示すブロック図、図２は同赤外線検出装
置の外観を示す図、図３は同赤外線検出装置の赤外線センサの一方向への回動を示す図、図４は同赤外線センサの他方向への回動を示す図である。 FIG. 1 is a block diagram showing the configuration of the infrared detection device of the first embodiment, FIG. 2 is a view showing the appearance of the infrared detection device, and FIG. 3 shows rotation of the infrared sensor of the infrared detection device in one direction. FIG. 4 is a diagram showing the rotation of the infrared sensor in the other direction.

実施の形態１の赤外線検出装置１は、熱源となる人などの被測定体２から出る赤外線を検出する赤外線センサ３と、赤外線センサ３を回動走査する走査部４と、赤外線センサ３を処理する処理部５と、走査部４を制御する制御部６を有している。処理部５で処理された信号は、赤外線検出装置１を適用した電子機器７に出力される。 The infrared detection device 1 of the first embodiment processes an infrared sensor 3 that detects infrared rays emitted from an object to be measured 2 such as a person serving as a heat source, a scanning unit 4 that rotates and scans the infrared sensor 3, and an infrared sensor 3. It has a processing unit 5 for processing and a control unit 6 for controlling the scanning unit 4. The signal processed by the processing unit 5 is output to the electronic device 7 to which the infrared detection device 1 is applied.

赤外線センサ３は、感温部が埋設された熱型赤外線検出器を有しており、感温部には被検出体から放射された赤外線による熱エネルギーを電気エネルギーに変換するサーモパイルにより構成される熱電変換部が用いられている。また、赤外線センサ３は、感温部および感温部の出力電圧を取り出すためのＭＯＳトランジスタを有したａ×ｂ個の画素部（非接触赤外線検知素子）が、半導体基板の一表面側においてａ行ｂ列の２次元アレイ状に配置されており、赤外線センサ３では画素部は８×８に構成されている。なお、画素部は８×８に限られず、例えば、１６×４のように構成しても良い。 The infrared sensor 3 has a thermal infrared detector in which a temperature sensitive portion is embedded, and the temperature sensitive portion is composed of a thermopile that converts the thermal energy of infrared rays radiated from the object to be detected into electrical energy. A thermoelectric conversion unit is used. Further, in the infrared sensor 3, a × b pixel portions (non-contact infrared detection elements) having a temperature sensitive portion and a MOS transistor for extracting the output voltage of the temperature sensitive portion are a on one surface side of the semiconductor substrate. It is arranged in a two-dimensional array in rows and columns b, and the infrared sensor 3 has a pixel portion of 8 × 8. The pixel portion is not limited to 8 × 8, and may be configured as, for example, 16 × 4.

走査部４は、ステッピングモータ等のモータにより構成されており、モータの回転により、赤外線センサ３を軸周りに一方向と一方向とは反対の他方向に回動させる。走査部４には赤外線センサ３の回動を止めるストッパ（図示せず）がついており、赤外線センサ３が回動できる最大の最大回動角度は１２０°となっている。この最大回動角度回動するごとに、反対方向への回動を開始する。この最大回動角度は１２０°に限定されるものではなく、赤外線センサ３の使用用途によって適宜変更しても良い。走査部４の回動角度は走査部４が赤外線センサ３を一方向に回動させるとき、第１の角度θ１回動させるごとに赤外線センサ３の回動を止めて、赤外線センサ３による赤外線の検出を行う。また、走査部４が赤外線センサ３を他方向に回動させるとき、第２の角度θ２回動させるごとに赤外線センサ３の回動を止めて、赤外線センサ３による赤外線の検出を行う。第１の角度θ１回動させたときも、第２の角度θ２回動させたときも複数回測定をしている。第１の角度θ１は第２の角度θ２よりも小さく、第１の角度θ１は５°、第２の角度θ２は６０°になっている。なお、第１の角度θ１、第２の角度θ２はこれに限定されるものではなく、赤外線検出装置１の用途に応じて適宜変更することができる。このように第１の角度θ１よりも第２の角度θ２の方が大きい構成とすることにより、一方向へ回動するときよりも、他方向へ回動するときの方が早く赤外線センサ３を最大回動角度だけ回動させることが出来る。 The scanning unit 4 is composed of a motor such as a stepping motor, and the rotation of the motor causes the infrared sensor 3 to rotate around an axis in one direction and in the other direction opposite to one direction. The scanning unit 4 is provided with a stopper (not shown) for stopping the rotation of the infrared sensor 3, and the maximum rotation angle at which the infrared sensor 3 can rotate is 120 °. Each time the maximum rotation angle is rotated, rotation in the opposite direction is started. This maximum rotation angle is not limited to 120 °, and may be appropriately changed depending on the intended use of the infrared sensor 3. As for the rotation angle of the scanning unit 4, when the scanning unit 4 rotates the infrared sensor 3 in one direction, the rotation of the infrared sensor 3 is stopped each time the infrared sensor 3 is rotated by the first angle θ1, and the infrared rays from the infrared sensor 3 are measured. Perform detection. Further, when the scanning unit 4 rotates the infrared sensor 3 in the other direction, the rotation of the infrared sensor 3 is stopped each time the infrared sensor 3 is rotated by the second angle θ2, and the infrared sensor 3 detects infrared rays. The measurement is performed a plurality of times both when the first angle θ1 is rotated and when the second angle θ2 is rotated. The first angle θ1 is smaller than the second angle θ2, the first angle θ1 is 5 °, and the second angle θ2 is 60 °. The first angle θ1 and the second angle θ2 are not limited to these, and can be appropriately changed according to the application of the infrared detection device 1. By configuring the second angle θ2 to be larger than the first angle θ1 in this way, the infrared sensor 3 can be rotated faster in the other direction than in one direction. It can be rotated by the maximum rotation angle.

赤外線センサ３は、一方向へ回動するときは、最大回動角度だけ回動し終えると、途中で取得した熱画像を全て足し合わせる。これにより、高解像度の熱画像を検出することができ、被測定体２の温度の検出精度が向上する。 When the infrared sensor 3 rotates in one direction, when it finishes rotating by the maximum rotation angle, all the thermal images acquired on the way are added together. As a result, a high-resolution thermal image can be detected, and the temperature detection accuracy of the object to be measured 2 is improved.

一方で、他方向へ赤外線センサ３を回動させたときは、第２の角度θ２回動するごとに、熱画像の検出を行う。他方向への回動時には一方向への回動時の様に熱画像の足し合わせは行わず、赤外線センサ３で熱画像を取得する度に赤外線センサ３の出力を処理部５で処理する。これにより、他方向への回動時には被測定体２の活動量を検出することができる。 On the other hand, when the infrared sensor 3 is rotated in the other direction, the thermal image is detected every time the infrared sensor 3 is rotated by the second angle θ2. When rotating in the other direction, the thermal images are not added as in the case of rotating in one direction, and each time the infrared sensor 3 acquires a thermal image, the processing unit 5 processes the output of the infrared sensor 3. As a result, the amount of activity of the object to be measured 2 can be detected when rotating in the other direction.

このように、一方向への回動時には高解像度の熱画像を取得して被測定体２の温度を高精度に検出し、他方向への回動時には一方向への回動時よりも粗い熱画像を用いた被測定体２の活動量の検出を行っている。他方向への回動時には高解像度の熱画像は必要にならないため、第２の角度θ２を第１の角度θ１よりも大きくすることで他方向への回動時間を短くすることが出来る。これにより、短時間で被測定体２の高精度な温度検出と活動量の検出の両方を行うことが出来る。 In this way, when rotating in one direction, a high-resolution thermal image is acquired to detect the temperature of the object to be measured 2 with high accuracy, and when rotating in the other direction, it is coarser than when rotating in one direction. The amount of activity of the object to be measured 2 is detected using a thermal image. Since a high-resolution thermal image is not required when rotating in the other direction, the rotation time in the other direction can be shortened by making the second angle θ2 larger than the first angle θ1. As a result, it is possible to perform both highly accurate temperature detection and activity amount detection of the object to be measured 2 in a short time.

赤外線検出装置１は、被測定体２の高精度な温度の検出と活動量の検出の両方を行うことが出来るため、熱源である被測定体２が複数いる場合や、被測定体２が移動した場合でも、追従して被測定体２の温度を検出することができる。 Since the infrared detection device 1 can detect both the temperature of the object to be measured 2 and the amount of activity with high accuracy, the object to be measured 2 moves when there are a plurality of objects to be measured 2 which are heat sources. Even in this case, the temperature of the object to be measured 2 can be detected by following the procedure.

（実施の形態２）
以下に、実施の形態２の赤外線検出装置について説明する。 (Embodiment 2)
The infrared detection device of the second embodiment will be described below.

図５は実施の形態２の赤外線検出装置のブロック図である。 FIG. 5 is a block diagram of the infrared detection device of the second embodiment.

実施の形態２の赤外線検出装置１１は、人などの被測定対象から出る赤外線を検出する赤外線センサ３と、赤外線センサ３を回動走査する走査部４と、赤外線センサ３を処理する処理部５と、走査部４を制御する制御部６と、赤外線センサ３の環境温度を検出する温度センサ１２を有している。走査部４は、赤外線センサ３を一方向へ回動させるときには第１の角度θ１で回動させ、他方向へ赤外線センサ３を回動させるときには第１の角度θ１よりも大きい第２の角度θ２で回動させる。 The infrared detection device 11 of the second embodiment has an infrared sensor 3 that detects infrared rays emitted from an object to be measured such as a person, a scanning unit 4 that rotates and scans the infrared sensor 3, and a processing unit 5 that processes the infrared sensor 3. It also has a control unit 6 that controls the scanning unit 4 and a temperature sensor 12 that detects the ambient temperature of the infrared sensor 3. The scanning unit 4 rotates the infrared sensor 3 at a first angle θ1 when rotating it in one direction, and a second angle θ2 larger than the first angle θ1 when rotating the infrared sensor 3 in the other direction. Rotate with.

温度センサ１２にはサーミスタが用いられている。なお、温度センサ１２は赤外線センサ３の環境温度を検出することができれば、他のものを用いても良い。 A thermistor is used for the temperature sensor 12. As the temperature sensor 12, another one may be used as long as it can detect the environmental temperature of the infrared sensor 3.

走査部４は温度センサ１２の出力により、赤外線センサ３を一方向へ回動させる第１の角度θ１を変更する。実施の形態２の赤外線センサ３においては、環境温度が２０℃のとき第１の角度θ１は５°である。赤外線センサ３の環境温度が１℃上昇するごとに走査部４は第１の角度θ１を０．５°ずつ小さくする。環境温度が高くなればなるほど被測定体２と背景の温度が近くなり、温度の検出精度が低下する。しかし、環境温度の上昇に応じて第１の角度θ１を小さくすることにより、一方向へ回動したときに得られる熱画像がより高解像度になっていく。これにより、一方向へ赤外線センサ３を回動させるのにかかる時間は長くなるが、被測定体２の温度の検出精度は実施の形態１に比べて向上する。このため、赤外線センサ３の検出精度が向上する。また、環境温度が２８℃になると第１の角度θ１が１°になるが、これ以上環境温度が上昇しても第１の角度θ１は１°から変更しない。このように、第１の角度θ１の限界値を設定しておくことにより、第１の角度θ１が小さくなりすぎて一方向への回動時間が極端に長くなりすぎることを防止できる。
The scanning unit 4 changes the first angle θ1 for rotating the infrared sensor 3 in one direction according to the output of the temperature sensor 12. In the infrared sensor 3 of the second embodiment, the first angle θ1 is 5 ° when the environmental temperature is 20 ° C. Every time the environmental temperature of the infrared sensor 3 rises by 1 ° C. , the scanning unit 4 reduces the first angle θ1 by 0.5 °. The higher the environmental temperature, the closer the temperature of the object to be measured 2 to the background, and the lower the temperature detection accuracy. However, by reducing the first angle θ1 as the environmental temperature rises, the thermal image obtained when rotating in one direction becomes higher in resolution. As a result, it takes a long time to rotate the infrared sensor 3 in one direction, but the temperature detection accuracy of the object 2 to be measured is improved as compared with the first embodiment. Therefore, the detection accuracy of the infrared sensor 3 is improved. Further, when the environmental temperature reaches 28 ° C. , the first angle θ1 becomes 1 °, but even if the environmental temperature rises further, the first angle θ1 does not change from 1 °. By setting the limit value of the first angle θ1 in this way, it is possible to prevent the first angle θ1 from becoming too small and the rotation time in one direction becoming extremely long.

なお、環境温度が変化したときの第１の角度θ１は赤外線検出装置１１の用途に応じて適宜変更することが出来る。 The first angle θ1 when the environmental temperature changes can be appropriately changed according to the application of the infrared detection device 11.

また、実施の形態２では、温度センサ１２を別途設けて赤外線センサ３の環境温度を検出しているが、一方向への回動時に得られた熱画像の背景温度から赤外線センサ３の環境温度を検出しても良い。このように、赤外線センサ３の出力から環境温度を検出することで、温度センサ１２を設ける必要がなくなり、赤外線検出装置を小型化することが出来る。 Further, in the second embodiment, the temperature sensor 12 is separately provided to detect the ambient temperature of the infrared sensor 3, but the ambient temperature of the infrared sensor 3 is obtained from the background temperature of the thermal image obtained when the infrared sensor 3 is rotated in one direction. May be detected. By detecting the environmental temperature from the output of the infrared sensor 3 in this way, it is not necessary to provide the temperature sensor 12, and the infrared detection device can be miniaturized.

（実施の形態３）
以下に、実施の形態３の赤外線検出装置について図面を用いながら説明する。 (Embodiment 3)
Hereinafter, the infrared detection device of the third embodiment will be described with reference to the drawings.

図６は実施の形態３の赤外線検出装置のブロック図である。 FIG. 6 is a block diagram of the infrared detection device of the third embodiment.

実施の形態３の赤外線検出装置２１は、人などの被測定対象から出る赤外線を検出する赤外線センサ３と、赤外線センサ３を回動走査する走査部４と、赤外線センサ３を処理する処理部５と、走査部４を制御する制御部６と、赤外線センサ３の環境温度を検出する温
度センサ１２を有している。走査部４は、赤外線センサ３を一方向へ回動させるときには第１の角度θ１で回動させ、他方向へ赤外線センサ３を回動させるときには第１の角度θ１よりも大きい第２の角度θ２で回動させる。 The infrared detection device 21 of the third embodiment has an infrared sensor 3 that detects infrared rays emitted from an object to be measured such as a person, a scanning unit 4 that rotates and scans the infrared sensor 3, and a processing unit 5 that processes the infrared sensor 3. It also has a control unit 6 that controls the scanning unit 4 and a temperature sensor 12 that detects the ambient temperature of the infrared sensor 3. The scanning unit 4 rotates the infrared sensor 3 at a first angle θ1 when rotating it in one direction, and a second angle θ2 larger than the first angle θ1 when rotating the infrared sensor 3 in the other direction. Rotate with.

赤外線検出装置２１は、走査部４が学習機能を備えている。赤外線センサ３は、赤外線センサ３の検出した結果から被測定体２がいる可能性が高い場所を学習する。被測定体２がいるかどうかで、他方向へ赤外線センサ３を回動時の第２の角度θ２回動させて赤外線センサ３で測定する回数を変更する。例えば、人がいる可能性が高いと推定した領域の測定時には赤外線センサ３での測定回数を１０回とし、人がいない可能性が高いと推定した領域の測定時には赤外線センサ３での測定回数を５回とする。このようにする事で、人がいない領域の測定時間を短縮することが出来る。人がいない領域では被測定体２の活動量を測定する必要がないため、赤外線センサ３の性能を低下させずに赤外線センサ３の走査時間の短縮をすることができる。他方向への走査時に人がいないと推定した領域に被測定体２がいた場合には、次の他方向への回動時にはその領域での測定回数を人がいる可能性が高い領域と同じにする。これにより、被測定体２が移動した場合でも、赤外線検出装置の性能を低下させずに、赤外線センサ３の走査時間の短縮を行うことができる。 In the infrared detection device 21, the scanning unit 4 has a learning function. The infrared sensor 3 learns a place where the object to be measured 2 is likely to be present from the detection result of the infrared sensor 3. Depending on whether or not the object to be measured 2 is present, the infrared sensor 3 is rotated by the second angle θ2 when rotating in the other direction, and the number of times of measurement by the infrared sensor 3 is changed. For example, when measuring an area estimated to have a high possibility of having a person, the number of measurements with the infrared sensor 3 is set to 10 times, and when measuring an area estimated to have a high possibility of having no people, the number of measurements taken with the infrared sensor 3 is set to 10. 5 times. By doing so, it is possible to shorten the measurement time in an area where there are no people. Since it is not necessary to measure the amount of activity of the object to be measured 2 in an area where there are no people, the scanning time of the infrared sensor 3 can be shortened without deteriorating the performance of the infrared sensor 3. If the object to be measured 2 is in an area estimated to be empty when scanning in the other direction, the number of measurements in that area will be the same as in the area where there is a high possibility that there will be people when rotating in the next other direction. To. As a result, even when the object 2 to be measured moves, the scanning time of the infrared sensor 3 can be shortened without deteriorating the performance of the infrared detection device.

なお、他方向への回動時の測定回数は人がいる可能性が高い路領域で１０回、人がいない可能性が高い領域で５回としたが、これに限られない。赤外線検出装置２１の用途に応じて赤外線センサ３の測定回数は適宜変更することが出来る。 The number of measurements when rotating in the other direction is 10 times in the road area where there is a high possibility of having people, and 5 times in the area where there is a high possibility that there are no people, but the number of measurements is not limited to this. The number of measurements of the infrared sensor 3 can be appropriately changed according to the application of the infrared detection device 21.

（実施の形態４）
以下に、実施の形態３の赤外線検出装置について図面を用いながら説明する。 (Embodiment 4)
Hereinafter, the infrared detection device of the third embodiment will be described with reference to the drawings.

図７は実施の形態４の赤外線検出装置のブロック図である。 FIG. 7 is a block diagram of the infrared detection device of the fourth embodiment.

実施の形態３の赤外線センサ３は、人などの被測定対象から出る赤外線を検出する赤外線センサ３と、赤外線センサ３を回動走査する走査部４と、赤外線センサ３を処理する処理部５と、走査部４を制御する制御部６と、赤外線センサ３の環境温度を検出する温度センサ１２を有している。走査部４は、赤外線センサ３を一方向へ回動させるときには第１の角度θ１で回動させ、他方向へ赤外線センサ３を回動させるときには第１の角度θ１よりも大きい第２の角度θ２で回動させる。 The infrared sensor 3 of the third embodiment includes an infrared sensor 3 that detects infrared rays emitted from an object to be measured such as a person, a scanning unit 4 that rotates and scans the infrared sensor 3, and a processing unit 5 that processes the infrared sensor 3. It has a control unit 6 that controls the scanning unit 4 and a temperature sensor 12 that detects the ambient temperature of the infrared sensor 3. The scanning unit 4 rotates the infrared sensor 3 at a first angle θ1 when rotating it in one direction, and a second angle θ2 larger than the first angle θ1 when rotating the infrared sensor 3 in the other direction. Rotate with.

実施の形態４の赤外線検出装置３１は、一方向への回動時に被測定体２が検出されなかった場合、他方向への回動時に第２の角度θ２回動したときの測定回数を少なくする。ここでは、一方向への回動時に被測定体２の存在が検出された場所を他方向への回動時に測定する回数は１０回であり、被測定体２の存在が検出されなかった場所を他方向への回動時に測定する回数は５回とする。 In the infrared detection device 31 of the fourth embodiment, when the object to be measured 2 is not detected when rotating in one direction, the number of measurements when the second angle θ2 is rotated when rotating in the other direction is reduced. To do. Here, the number of times the location where the presence of the object to be measured 2 is detected when rotating in one direction is measured when rotating in the other direction is 10 times, and the location where the presence of the object to be measured 2 is not detected. Is measured 5 times when rotating in the other direction.

図８は一方向への回動時の赤外線センサと被測定体の関係を示す図、図９は他方向への回動時の赤外線センサと被測定体の関係を示す図である。他方向への最大回動角度を１２０°、第２の回動角度を３０°とし、赤外線センサ３が端部から他方向へ回動する第２の回動角度ごとに、第１の測定方向Ｓ１、第２の測定方向Ｓ２、・・・、第５の測定方向Ｓ５として説明する。 FIG. 8 is a diagram showing the relationship between the infrared sensor and the object to be measured when rotating in one direction, and FIG. 9 is a diagram showing the relationship between the infrared sensor and the object to be measured when rotating in the other direction. The maximum rotation angle in the other direction is 120 °, the second rotation angle is 30 °, and the first measurement direction is set for each second rotation angle in which the infrared sensor 3 rotates from the end in the other direction. S1, the second measurement direction S2, ..., The fifth measurement direction S5 will be described.

被測定体２が第２の測定方向Ｓ２におり、一方向への回動時に被測定体２の存在を検出した場合、他方向への回動時に第２の測定方向Ｓ２では赤外線センサ３は１０回測定し、それ以外の測定方向では５回測定する。このように測定をすることにより、赤外線センサ３の活動量の検出精度を低下させずに走査時間を短縮することが出来る。 When the object to be measured 2 is in the second measurement direction S2 and the presence of the object to be measured 2 is detected when rotating in one direction, the infrared sensor 3 is in the second measurement direction S2 when rotating in the other direction. Measure 10 times, and measure 5 times in other measurement directions. By performing the measurement in this way, the scanning time can be shortened without deteriorating the detection accuracy of the activity amount of the infrared sensor 3.

次に、図１０に被測定体が移動した場合の赤外線センサの回動を示す図である。被測定体２が第３の測定方向Ｓ３に移動し、一方向への回動時にこれを検出した場合は、他方向への回動時に第３の測定方向Ｓ３では赤外線センサ３は１０回測定し、それ以外の測定方向では５回測定する。このようにすることで、被測定体２の移動を追従することができる。 Next, FIG. 10 is a diagram showing the rotation of the infrared sensor when the object to be measured moves. When the object to be measured 2 moves in the third measurement direction S3 and detects this when rotating in one direction, the infrared sensor 3 measures 10 times in the third measurement direction S3 when rotating in the other direction. However, in the other measurement directions, the measurement is performed 5 times. By doing so, the movement of the object to be measured 2 can be followed.

なお、最大回動角度、第２の角度θ２、測定回数は説明のために例示したものであり、実施の形態４で説明した回数に限定されるものではない。赤外線検出装置３１の用途に応じて適宜変更することが出来る。測定回数は０回にすることもできる。この場合、赤外線センサ３の走査時間をさらに短縮することが出来る。 The maximum rotation angle, the second angle θ2, and the number of measurements are exemplified for the sake of explanation, and are not limited to the number of times described in the fourth embodiment. It can be appropriately changed according to the application of the infrared detection device 31. The number of measurements can be set to 0. In this case, the scanning time of the infrared sensor 3 can be further shortened.

本開示は、熱源が複数個ある場合や熱源が移動する場合でも、高精度に赤外線の検出をすることができるため、空調機器等に有用である。 The present disclosure is useful for air conditioners and the like because infrared rays can be detected with high accuracy even when there are a plurality of heat sources or the heat sources move.

１、１１、２１、３１ 赤外線検出装置
２ 被測定体
３ 赤外線センサ
４ 走査部
５ 処理部
６ 制御部
７ 電子機器
１２ 温度センサ 1, 11, 21, 31 Infrared detector 2 Infrared detector 3 Infrared sensor 4 Scanning unit 5 Processing unit 6 Control unit 7 Electronic device 12 Temperature sensor

Claims (4)

被測定対象の赤外線を検出する赤外線センサと、
前記赤外線センサを一方向と一方向とは反対の他方向に回動走査する走査部と、
前記赤外線センサを制御する制御部を有し、
前記赤外線センサは、一方向へ回動するときは第１の角度回動するごとに赤外線の検出を行い、他方向へ回動するときは第２の角度回動するごとに赤外線の検出を行い、
前記第１の角度よりも前記第２の角度の方が大きく、
前記制御部は、前記赤外線センサが前記一方向へ回動するときの出力から前記被測定対象のいる可能性が高い第１の領域と前記被測定対象のいる可能性が低い第２の領域を設定し、
前記制御部は、前記赤外線センサが前記他方向へ回動するときの前記第１の領域における前記赤外線センサの測定回数よりも、前記赤外線センサが前記他方向へ回動するときの前記第２の領域における前記赤外線センサの測定回数を少なくする赤外線検出装置。 An infrared sensor that detects infrared rays to be measured and
A scanning unit that rotates and scans the infrared sensor in one direction and in the other direction opposite to one direction .
It has a control unit that controls the infrared sensor.
When the infrared sensor rotates in one direction, it detects infrared rays every time it rotates in the first angle, and when it rotates in the other direction, it detects infrared rays every time it rotates in a second angle. ,
The second angle is larger than the first angle,
From the output when the infrared sensor rotates in the one direction, the control unit sets a first region in which the object to be measured is likely to be present and a second region in which the object to be measured is unlikely to be present. Set,
The control unit is the second when the infrared sensor is rotated in the other direction, rather than the number of measurements of the infrared sensor in the first region when the infrared sensor is rotated in the other direction. An infrared detection device that reduces the number of measurements by the infrared sensor in a region. 前記赤外線センサの回動時間は、一方向への回動時よりも他方向への回動時の方が短い請求項１に記載の赤外線検出装置。 The infrared detection device according to claim 1, wherein the rotation time of the infrared sensor is shorter when rotating in the other direction than when rotating in one direction. 前記走査部は、前記赤外線センサの環境温度が高くなるにつれて、前記第１の角度を小さくする請求項１または２に記載の赤外線検出装置。 The infrared detection device according to claim 1 or 2, wherein the scanning unit reduces the first angle as the ambient temperature of the infrared sensor increases. 前記走査部は、一方向への回動時に前記被測定対象が検出できない場合、前記第２の角度を大きくする請求項１〜３のいずれかに記載の赤外線検出装置。 The infrared detection device according to any one of claims 1 to 3, wherein the scanning unit increases the second angle when the object to be measured cannot be detected when rotating in one direction.
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