JPH05264743A - Infrared detector - Google Patents
Infrared detectorInfo
- Publication number
- JPH05264743A JPH05264743A JP7642591A JP7642591A JPH05264743A JP H05264743 A JPH05264743 A JP H05264743A JP 7642591 A JP7642591 A JP 7642591A JP 7642591 A JP7642591 A JP 7642591A JP H05264743 A JPH05264743 A JP H05264743A
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- power supply
- detection
- circuit
- chopper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、赤外線検出装置に関
し、特に、微分型の出力特性を有する熱型赤外線検出素
子を用いた赤外線検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared detecting device, and more particularly to an infrared detecting device using a thermal infrared detecting element having a differential output characteristic.
【０００２】[0002]
【従来の技術】微分型の出力特性を有する熱型赤外線検
出素子を用いた赤外線検出装置では、定常的な強度を有
するが変化の極めて遅い赤外線を検出するために、周期
的に赤外線を遮断する赤外線遮断手段が必要となる。2. Description of the Related Art In an infrared detection device using a thermal infrared detection element having a differential output characteristic, infrared rays are periodically cut off in order to detect infrared rays having a steady intensity but a very slow change. Infrared blocking means is required.
【０００３】従来のこの種の赤外線検出装置として、焦
電体を検知部に持つ赤外線検出素子を用いた赤外線検出
装置の一例を図２に示す。この赤外線検出装置５１は、
入射赤外線量の変化に基づいて電荷を発生する焦電体を
用いた赤外線検出素子５２と，その赤外線検出素子５２
からの電気信号を処理し外部に出力する信号処理回路５
３と，前記赤外線検出素子５２に入射する赤外線Ｌを周
期的に遮断するチョッパー５４と，そのチョッパー５４
を駆動するチョッパー駆動回路５５とから構成されてい
る。FIG. 2 shows an example of an infrared detecting device using an infrared detecting element having a pyroelectric body as a detecting portion as a conventional infrared detecting device of this type. This infrared detector 51 is
Infrared detecting element 52 using a pyroelectric body that generates an electric charge based on a change in the amount of incident infrared rays, and the infrared detecting element 52.
Signal processing circuit 5 that processes electrical signals from
3, a chopper 54 that periodically blocks the infrared rays L entering the infrared detecting element 52, and the chopper 54
And a chopper drive circuit 55 for driving the.
【０００４】信号処理回路５３とチョッパー駆動回路５
５には、外部から電源が供給されている。Signal processing circuit 53 and chopper drive circuit 5
Power is supplied to 5 from the outside.
【０００５】[0005]
【発明が解決しようとする課題】赤外線検出器装置は、
例えばエアコンの運転制御のように放射エネルギーを検
出して機器の運転を制御したり、電池駆動式の可搬型の
二酸化炭素モニタ装置のような赤外線の吸収を応用した
装置などに利用されているが、このような用途たとえば
エアコンでは運転開始時や温度設定の変更があった時な
どに赤外線検出装置を作動させればよく、また、二酸化
炭素モニタでは一定間隔で測定を行えばよい場合が多い
ので、間欠的に赤外線検出装置を作動させればよく、常
に赤外線検出装置を作動させておく必要はない。The infrared detector device is
For example, it is used for detecting the radiant energy to control the operation of the equipment such as the operation control of the air conditioner, and for the device applying the absorption of infrared rays such as the battery-powered portable carbon dioxide monitor. In such applications, for example, in an air conditioner, it is sufficient to activate the infrared detection device at the time of starting operation or when the temperature setting is changed, and in many cases, it is sufficient to perform measurements at regular intervals with a carbon dioxide monitor. The infrared detection device may be operated intermittently, and it is not necessary to always operate the infrared detection device.
【０００６】しかし、微分型の出力特性を有する熱型赤
外線検出素子を含む検出回路は、立上がりが遅い（給電
をオンしてから動作が安定するまでに時間がかかる）た
め、給電をオフすることが出来ず、常に作動させておく
必要があった。However, the detection circuit including the thermal type infrared detection element having the differential output characteristic has a slow rise (it takes time from turning on the power supply to stabilizing the operation), and therefore the power supply should be turned off. I couldn't do it and had to keep it running.
【０００７】このため、無駄に電力を消費する問題点が
ある。従って、例えば電池駆動の機器などに組み込んで
使用する場合、電池の消耗がはやい問題点がある。Therefore, there is a problem that power is wasted. Therefore, when used by being incorporated in, for example, a battery-driven device, there is a problem that the battery is consumed quickly.
【０００８】そこで、この発明の目的は、立上がりが遅
いことによる不都合を生じさせずに消費電力を低減でき
るように改良した赤外線検出装置を提供することにあ
る。Therefore, an object of the present invention is to provide an improved infrared detecting device capable of reducing the power consumption without causing the inconvenience caused by the slow rising.
【０００９】[0009]
【課題を解決するための手段】この発明の赤外線検出装
置は、入射赤外線に対して微分型の出力特性を有する熱
型赤外線検出素子を含む検出回路と、前記赤外線検出素
子に入射する赤外線を周期的に遮断する赤外線遮断手段
とを備えた赤外線検出装置において、赤外線遮断手段へ
の給電を検出回路への給電とは独立に制御する給電制御
手段を具備したことを構成上の特徴とするものである。SUMMARY OF THE INVENTION An infrared detecting device according to the present invention comprises a detection circuit including a thermal infrared detecting element having a differential output characteristic with respect to an incident infrared ray, and a cycle of infrared rays incident on the infrared detecting element. In the infrared detection device provided with the infrared cutoff means for automatically shutting off, the power supply control means for controlling the power supply to the infrared cutoff means independently of the power supply to the detection circuit is provided as a structural feature. is there.
【００１０】また、この発明の赤外線検出装置は、微分
型の出力特性を有する熱型赤外線検出素子を含む検出回
路と、前記赤外線検出素子に入射する赤外線を周期的に
遮断する赤外線遮断手段とを備えた赤外線検出装置にお
いて、赤外線遮断手段の周期的遮断動作およびその停止
をさせる信号を出力する給電制御手段を具備したことを
構成上の特徴とするものである。Further, the infrared detecting device of the present invention comprises a detection circuit including a thermal infrared detecting element having a differential type output characteristic, and infrared blocking means for periodically blocking infrared rays incident on the infrared detecting element. The infrared detecting device provided is characterized in that it is provided with a power supply control means for outputting a signal for causing the infrared cutoff means to perform a periodic cutoff operation and its stop.
【００１１】[0011]
【作用】この発明の赤外線検出装置では、給電制御手段
が赤外線遮断手段への給電を検出回路への給電とは独立
にオン／オフする。つまり、検出回路への給電はオンし
たまま、赤外線遮断手段のみをオフする。そして、赤外
線検出が必要な時のみ、赤外線遮断手段をオンする。In the infrared detector of the present invention, the power supply control means turns on / off the power supply to the infrared cutoff means independently of the power supply to the detection circuit. That is, only the infrared ray blocking means is turned off while the power supply to the detection circuit is on. Then, the infrared ray blocking means is turned on only when infrared ray detection is necessary.
【００１２】そこで、検出回路の立上がりが遅いことに
よる不都合を生じさせずに消費電力を低減できるように
なる。Therefore, the power consumption can be reduced without causing the inconvenience caused by the slow rise of the detection circuit.
【００１３】また、この発明の赤外線検出装置では、周
期的遮断動作オン／オフ制御手段が赤外線遮断手段の周
期的遮断動作をオン／オフする。つまり、赤外線検出が
必要な時以外は、赤外線遮断手段の周期的遮断動作をオ
フする。周期的遮断動作をオフすると、消費電力は少な
くなる。Further, in the infrared detector of the present invention, the periodic cutoff operation on / off control means turns on / off the periodic cutoff operation of the infrared cutoff means. That is, the periodic blocking operation of the infrared blocking means is turned off except when infrared detection is required. When the periodic cutoff operation is turned off, power consumption is reduced.
【００１４】そこで、検出回路の立上がりが遅いことに
よる不都合を生じさせずに消費電力を低減できるように
なる。Therefore, the power consumption can be reduced without causing the inconvenience caused by the slow rise of the detection circuit.
【００１５】[0015]
【実施例】以下、図に示す実施例に基づいてこの発明を
さらに詳細に説明する。なお、これによりこの発明が限
定されるものではない。図１は、この発明の赤外線検出
装置の一実施例のブロック図である。この赤外線検出装
置１は、赤外線検出素子２と，信号処理回路３と，チョ
ッパー４と，チョッパー駆動回路５と，給電制御回路６
とから構成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the embodiments shown in the drawings. However, this does not limit the present invention. FIG. 1 is a block diagram of an embodiment of the infrared detector of the present invention. The infrared detecting device 1 includes an infrared detecting element 2, a signal processing circuit 3, a chopper 4, a chopper driving circuit 5, and a power feeding control circuit 6.
It consists of and.
【００１６】この赤外線検出装置１では、赤外線検出素
子２は、入射赤外線量の変化に基づいて電気信号を出力
する。信号処理回路３は、前記電気信号を処理して外部
へ出力する。具体的には、赤外線検出素子２の交流出力
信号を増幅・整流して所定の直流信号とするものであ
る。チョッパー４は、チョッパー駆動回路５により駆動
され、赤外線検出素子２に入射する赤外線Ｌを周期的に
遮断する。チョッパーは、低電圧駆動を可能とするコイ
ル駆動式である。給電制御回路６は、外部からの給電制
御信号に応じて、チョッパー駆動回路５への給電をオン
／オフする。In the infrared detecting device 1, the infrared detecting element 2 outputs an electric signal based on a change in the amount of incident infrared rays. The signal processing circuit 3 processes the electric signal and outputs it to the outside. Specifically, the AC output signal of the infrared detection element 2 is amplified and rectified into a predetermined DC signal. The chopper 4 is driven by the chopper drive circuit 5 and periodically blocks the infrared rays L entering the infrared detection element 2. The chopper is a coil drive type that enables low voltage drive. The power supply control circuit 6 turns on / off the power supply to the chopper drive circuit 5 according to a power supply control signal from the outside.
【００１７】この赤外線検出装置１を例えばエアコンの
制御に利用する場合は、エアコンの運転開始時や温度設
定の変更があった時などに給電オン制御信号を与えてチ
ョッパー駆動回路５に給電し、チョッパー４を作動させ
る。そして、検出される赤外線放射エネルギー量が安定
すると、給電オフ制御信号を与えてチョッパー駆動回路
５への給電を停止させる。When the infrared detecting device 1 is used for controlling an air conditioner, for example, a power-on control signal is supplied to supply power to the chopper drive circuit 5 at the start of operation of the air conditioner or when the temperature setting is changed. Operate the chopper 4. Then, when the detected infrared radiation energy amount becomes stable, a power supply off control signal is given to stop the power supply to the chopper drive circuit 5.
【００１８】給電のオン／オフはチョッパー部分だけで
あるが、この部分の消費電力が大きいため、十分に消費
電力の節減となる。The power supply is turned on / off only in the chopper portion, but since the power consumption in this portion is large, the power consumption is sufficiently saved.
【００１９】なお、赤外線検出素子２と信号処理回路３
への給電は常にオンであるため、立上がりが遅いことに
よる支障は生じない。The infrared detecting element 2 and the signal processing circuit 3
Since the power supply to is always on, there is no problem due to the slow rise.
【００２０】図２は、この発明の他の実施例を示すブロ
ック図である。チョッパー駆動回路５と給電制御回路６
は、外部電源たとえば電池から電力を供給されている。
この場合、給電制御回路６は、外部からの給電制御信号
に応じて動作し、チョッパー駆動回路５に信号を送り、
チョッパー駆動回路５をハングアップ（周期的遮断動作
停止）させる。従って、外部からの制御信号により、一
定時間毎に検出を行うことが可能となる。FIG. 2 is a block diagram showing another embodiment of the present invention. Chopper drive circuit 5 and power supply control circuit 6
Is powered by an external power source such as a battery.
In this case, the power supply control circuit 6 operates according to a power supply control signal from the outside, sends a signal to the chopper drive circuit 5,
The chopper drive circuit 5 is hung up (periodic interruption operation is stopped). Therefore, it becomes possible to perform detection at regular time intervals by a control signal from the outside.
【００２１】[0021]
【発明の効果】この発明の赤外線検出装置によれば、利
用機器の消費電力の低減が可能となり、電池寿命の延長
が可能となる。また、チョッパー駆動回路を赤外線検出
器の外部から制御することが可能となる。According to the infrared detecting apparatus of the present invention, the power consumption of the equipment used can be reduced and the battery life can be extended. Further, the chopper drive circuit can be controlled from outside the infrared detector.
【図１】この発明の赤外線検出装置の一実施例のブロッ
ク図である。FIG. 1 is a block diagram of an embodiment of an infrared detection device of the present invention.
【図２】従来の赤外線検出装置の一例のブロック図であ
る。FIG. 2 is a block diagram of an example of a conventional infrared detection device.
１ 赤外線検出装置 ２ 赤外線検出素子 ３ 信号処理回路 ４ チョッパー ５ チョッパー駆動回路 ６ 給電制御回路 1 infrared detection device 2 infrared detection element 3 signal processing circuit 4 chopper 5 chopper drive circuit 6 power supply control circuit
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年３月２４日[Submission date] March 24, 1993
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】この発明の赤外線検出装置の一実施例のブロッ
ク図である。FIG. 1 is a block diagram of an embodiment of an infrared detection device of the present invention.
【図２】従来の赤外線検出装置の一例のブロック図であ
る。 FIG. 2 is a block diagram of an example of a conventional infrared detection device.
【図３】従来の赤外線検出装置の一例のブロック図であFIG. 3 is a block diagram of an example of a conventional infrared detection device.
る。It
【符号の説明】 １ 赤外線検出装置 ２ 赤外線検出素子 ３ 信号処理回路 ４ チョッパー ５ チョッパー駆動回路 ６ 給電制御回路[Explanation of symbols] 1 infrared detection device 2 infrared detection element 3 signal processing circuit 4 chopper 5 chopper drive circuit 6 power supply control circuit
Claims (2)
有する熱型赤外線検出素子を含む検出回路と、前記赤外
線検出素子に入射する赤外線を周期的に遮断する赤外線
遮断手段とを備えた赤外線検出装置において、 赤外線遮断手段への給電を検出回路への給電とは独立に
制御する給電制御手段を具備したことを特徴とする赤外
線検出装置。1. An infrared ray comprising a detection circuit including a thermal infrared ray detection element having a differential type output characteristic with respect to an incident infrared ray, and an infrared ray blocking means for periodically blocking the infrared ray incident on the infrared ray detection element. An infrared detection device comprising a power supply control means for controlling the power supply to the infrared cutoff means independently of the power supply to the detection circuit.
出素子を含む検出回路と、前記赤外線検出素子に入射す
る赤外線を周期的に遮断する赤外線遮断手段とを備えた
赤外線検出装置において、 赤外線遮断手段の周期的遮断動作およびその停止をさせ
る信号を出力する給電制御手段を具備したことを特徴と
する赤外線検出装置。2. An infrared detection device comprising a detection circuit including a thermal infrared detection element having a differential output characteristic, and an infrared blocking means for periodically blocking infrared rays incident on the infrared detection element. An infrared detecting device comprising: a power supply control means for outputting a signal for causing the interruption means to perform a periodic interruption operation and its interruption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7642591A JPH05264743A (en) | 1991-04-09 | 1991-04-09 | Infrared detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7642591A JPH05264743A (en) | 1991-04-09 | 1991-04-09 | Infrared detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05264743A true JPH05264743A (en) | 1993-10-12 |
Family
ID=13604820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7642591A Pending JPH05264743A (en) | 1991-04-09 | 1991-04-09 | Infrared detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05264743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156281A (en) * | 2000-09-08 | 2002-05-31 | Matsushita Electric Works Ltd | Infrared detecting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01124721A (en) * | 1987-11-09 | 1989-05-17 | Nippon Ceramic Kk | Infrared detector |
-
1991
- 1991-04-09 JP JP7642591A patent/JPH05264743A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01124721A (en) * | 1987-11-09 | 1989-05-17 | Nippon Ceramic Kk | Infrared detector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156281A (en) * | 2000-09-08 | 2002-05-31 | Matsushita Electric Works Ltd | Infrared detecting device |
| JP4572496B2 (en) * | 2000-09-08 | 2010-11-04 | パナソニック電工株式会社 | Infrared detector |
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