JPH02170020A - Infrared ray detecting device - Google Patents
Infrared ray detecting deviceInfo
- Publication number
- JPH02170020A JPH02170020A JP63323723A JP32372388A JPH02170020A JP H02170020 A JPH02170020 A JP H02170020A JP 63323723 A JP63323723 A JP 63323723A JP 32372388 A JP32372388 A JP 32372388A JP H02170020 A JPH02170020 A JP H02170020A
- Authority
- JP
- Japan
- Prior art keywords
- infrared ray
- concave mirror
- ray detecting
- infrared
- infrared detection
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 28
- 230000005855 radiation Effects 0.000 claims description 3
- 239000006059 cover glass Substances 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0803—Arrangements for time-dependent attenuation of radiation signals
- G01J5/0805—Means for chopping radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/061—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity by controlling the temperature of the apparatus or parts thereof, e.g. using cooling means or thermostats
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/064—Ambient temperature sensor; Housing temperature sensor; Constructional details thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0803—Arrangements for time-dependent attenuation of radiation signals
- G01J5/0804—Shutters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0806—Focusing or collimating elements, e.g. lenses or concave mirrors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0815—Light concentrators, collectors or condensers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/048—Protective parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Radiation Pyrometers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ボイラ伝熱管の温度監視、ボイラケーシング
の温度監視、各種熱交換器例えば空気予熱器、脱硫装置
のガス・ガスヒータのメタル温度監視、又は脱硝装置触
媒の温度監視などに用いられる赤外線検出装置に関する
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to temperature monitoring of boiler heat exchanger tubes, temperature monitoring of boiler casings, metal temperature monitoring of various heat exchangers such as air preheaters, gas/gas heaters of desulfurization equipment, or This invention relates to an infrared detection device used for monitoring the temperature of a denitrification equipment catalyst.
検出して温度監視を行い、これにより火災などを検知す
る従来の赤外線検出装置として、例えば第２図に示すよ
うなものがある。For example, there is an infrared detection device shown in FIG. 2 as a conventional infrared detection device that detects and monitors temperature and thereby detects a fire or the like.
第２図において、赤外線検出装置１は赤外線を集光する
ためのフレネルレンズ２を包含し、このフレネルレンズ
２にて集光された赤外線が本体３内に置かれている赤外
線検出素子４に入射されるようになっている。In FIG. 2, an infrared detection device 1 includes a Fresnel lens 2 for condensing infrared rays, and the infrared rays condensed by this Fresnel lens 2 enter an infrared detection element 4 placed inside a main body 3. It is now possible to do so.
また、この赤外線検出素子４を冷却するための冷却水層
５が赤外線検出素子４を支持する支持材６と本体３との
間に形成され、冷却水は入ロアから入って出口８から出
ていく。Further, a cooling water layer 5 for cooling the infrared detecting element 4 is formed between the support material 6 that supports the infrared detecting element 4 and the main body 3, and the cooling water enters from the inlet lower and exits from the outlet 8. go.
なお、図示は省略しであるが、支持材６にはプリアンプ
なども取付けられている。また、本体３にはフレネルレ
ンズ２をクリーニングするためのエアホースが備えられ
ている。Although not shown, a preamplifier and the like are also attached to the support member 6. Further, the main body 3 is equipped with an air hose for cleaning the Fresnel lens 2.
発明が解決しようとする課題
ところで、温度監視に使用される赤外線検出装置は、高
感度でかつ高い信頼性が要求され、また既設備に追設さ
れることが多いので、コンパクトでかつ軽量であること
が求められている。Problems to be Solved by the Invention Incidentally, infrared detection devices used for temperature monitoring are required to have high sensitivity and high reliability, and because they are often added to existing equipment, they must be compact and lightweight. That is what is required.
したがって、従来の赤外線検出装置１は、コンパクト化
のため、レンズ焦点距離を短くできて、かつ軽量のフレ
ネルレンズ２を用いているが、フレネルレンズは集光性
が悪く、感度が低くなるため、大口径になり、結果的に
コンパクトにできなかった。Therefore, in order to make the conventional infrared detection device 1 compact, the lens focal length can be shortened and a lightweight Fresnel lens 2 is used. Due to the large diameter, it was not possible to make it compact.
また、赤外線検出素子４の部分の冷却を令部会水で行っ
ているため、冷却水系統の腐食に伴うトラブルが多発し
ている。そして、冷却水が停止すると、赤外線検出素子
の部分が１温以上に上昇するため、赤外線検出素子が破
壊されるので、高い信頼性を要求される監視計器として
は不適当となる。Furthermore, since the infrared detecting element 4 is cooled using coolant water, troubles due to corrosion of the cooling water system frequently occur. When the cooling water stops, the temperature of the infrared detection element rises to more than 1 degree, which destroys the infrared detection element, making it unsuitable for use as a monitoring instrument that requires high reliability.
課題を解決するための手段
本発明は、このような従来技術の課題を解決するために
、赤外線検出装置において、高温雰囲気に対向する第１
の凹面鏡の中央部分を開口し、この開口部分に電子冷却
素子上に取付けた赤外線検出素子を配置するとともに、
この赤外線検出素子に前記第１の凹面鏡にて反射された
赤外線を集光させる第２の凹面鏡を第１の凹面鏡と対向
して設けたものである。Means for Solving the Problems In order to solve the problems of the prior art, the present invention provides an infrared detection device with a first sensor facing a high-temperature atmosphere.
The central part of the concave mirror is opened, and an infrared detection element attached to the electronic cooling element is placed in this opening part, and
A second concave mirror that focuses infrared rays reflected by the first concave mirror on the infrared detection element is provided opposite to the first concave mirror.
作用
上記の手段によれば、向かい合った２つの凹面鏡にて、
微弱な赤外線を集光し、赤外線検出素子に当てることが
できるので、広い範囲の温度上昇による赤外線を検知す
ることができる。Effect: According to the above means, two concave mirrors facing each other,
Since weak infrared rays can be focused and applied to an infrared detection element, infrared rays caused by temperature increases can be detected over a wide range.
実施例
以下図面を参照して本発明の一実施例について詳述する
。EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図において、赤外線検出装置１１は高温雰囲気に対
向して配置された第１の大きな凹面鏡１２を包含し、こ
の凹面鏡１２はしたがって高温雰囲気から放射される微
弱な赤外線１３を受けることができる。この場合、赤外
線１３は集光フレーム１４の先端に取付けられている保
護用カバーガラス】５を通過してくる。In FIG. 1, the infrared detection device 11 includes a first large concave mirror 12 placed opposite the hot atmosphere, which concave mirror 12 can therefore receive weak infrared radiation 13 emitted from the hot atmosphere. In this case, the infrared rays 13 pass through a protective cover glass 5 attached to the tip of the condensing frame 14.
また、凹面鏡１２の中央部分は開口Ｉ６され、この開口
１６の部分に赤外線検出素子１７が配置されている。そ
して、凹面鏡１２にて反射された赤外線１３′を受けて
矢印１３″で示すように反射させ、赤外線検出素子１７
に矢印１３″′で示すように集光させる第２の小さな凹
面鏡１８が、第１の凹面鏡１２と対向する関係で、保護
用カバーガラス１５の下に設けられている。Further, the central portion of the concave mirror 12 has an opening I6, and an infrared detection element 17 is disposed in the opening 16. Then, the infrared ray 13' reflected by the concave mirror 12 is reflected as indicated by an arrow 13'', and the infrared detection element 17
A second small concave mirror 18 for concentrating light as indicated by arrow 13'' is provided under the protective cover glass 15 in opposing relation to the first concave mirror 12.
赤外線検出素子１７は、電子冷却素子１９の上に取付け
られて、凹面鏡１２の中央部下に設けられているセンサ
室２０に収納されている。電子冷却素子１９の上には、
また、プリアンプ２■、チョッパ２２及び熱電対式の温
度計２３が取付けられている。そして、センサ室２０の
下側には空気冷却部２４が設けられている。The infrared detection element 17 is mounted on the electronic cooling element 19 and housed in a sensor chamber 20 provided below the center of the concave mirror 12. On the electronic cooling element 19,
Further, a preamplifier 2■, a chopper 22, and a thermocouple type thermometer 23 are attached. An air cooling section 24 is provided below the sensor chamber 20.
次に、作用について説明する。Next, the effect will be explained.
高温雰囲気から放射される微弱な赤外線１３は、保護用
カバーガラス１５を通過後、一対の向かい合った凹面鏡
１２及び工８により矢印１３’、 １３” で示す如
く集光されて矢印１３ ”となり、赤外線検出素子１７
により増幅し、出力される。After passing through the protective cover glass 15, the weak infrared rays 13 emitted from the high-temperature atmosphere are condensed by a pair of opposing concave mirrors 12 and the workpiece 8 as shown by arrows 13' and 13'', becoming an infrared light 13''. Detection element 17
is amplified and output.
センサ室２０内の電子冷却素子１９の上には、赤外線検
出素子１７、プリアンプ２１及びチョッパ２２に加え、
熱電対式の温度計２３が取付けられているので、二つの
違った金属を用い電流を流すことにより、一方が冷却、
他方が発熱する特性（ベニルチエ効果）を利用し、電子
冷却素子１９のセンサ室２０内の温度は、温度計２３に
より監視され、一定温度に保持される。また、センサ室
２０の下部に設けられている空気冷却部２４が、電子冷
却素子１９からの放熱が必要な場合、空気により冷却す
る。Above the electronic cooling element 19 in the sensor chamber 20, in addition to the infrared detection element 17, the preamplifier 21, and the chopper 22,
Since a thermocouple type thermometer 23 is attached, one can be cooled or cooled by passing current through two different metals.
Utilizing the property that the other heats up (Beniltier effect), the temperature in the sensor chamber 20 of the electronic cooling element 19 is monitored by the thermometer 23 and maintained at a constant temperature. In addition, when heat radiation from the electronic cooling element 19 is required, the air cooling section 24 provided at the lower part of the sensor chamber 20 cools the sensor chamber 20 with air.
発明の効果
以上述べたように、本発明によれば、赤外線集光方式に
一対の向かい合った凹面鏡を用いているので、高感度の
ままで、赤外線検出装置のコンパクト化及び軽量化を図
ることができる。Effects of the Invention As described above, according to the present invention, since a pair of concave mirrors facing each other is used in the infrared condensing method, it is possible to make the infrared detection device compact and lightweight while maintaining high sensitivity. can.
また、赤外線検知素子の冷却に電子冷却を用いているの
で、信頼性を大幅に向上することができる。すなわち、
従来例におけろ水冷却による腐食のトラブルを無くすと
共に、電子冷却では極性逆接続により加熱も可能であり
、大気温度以下の場合でも、凍結の心配が無い。Furthermore, since electronic cooling is used to cool the infrared sensing element, reliability can be greatly improved. That is,
In addition to eliminating the problems of corrosion caused by conventional filter water cooling, electronic cooling also allows heating by reverse polarity connection, so there is no fear of freezing even when the temperature is below atmospheric temperature.
したがって、本発明によれば、高感度でかつコンパクト
軽量で信頼性の高い赤外線検出装置を提供することがで
きる。Therefore, according to the present invention, it is possible to provide an infrared detection device that is highly sensitive, compact, lightweight, and highly reliable.
第１図は本発明による赤外線検出装置の一例を示す構成
図、第２図は従来の赤外線検出装置を示す構成図である
。
１１・・赤外線検出装置、１２・・第１の凹面鏡、１３
．１３’、 １３” 、 １３”・・赤外線、１４・・
集光フレーム、１５・・保護用カバーガラス、１６・・
開口、１７・・赤外線検出素子、１８・・第２の凹面鏡
、１９・・電子冷却素子、２０・・センサ室、２１・・
プリアンプ、２２・・ヂョッパ、２３・・温度計、２４
・・（ほか１名）FIG. 1 is a configuration diagram showing an example of an infrared detection device according to the present invention, and FIG. 2 is a configuration diagram showing a conventional infrared detection device. 11... Infrared detection device, 12... First concave mirror, 13
．． 13', 13", 13"...Infrared, 14...
Concentrating frame, 15... Protective cover glass, 16...
Opening, 17...Infrared detection element, 18...Second concave mirror, 19...Electronic cooling element, 20...Sensor chamber, 21...
Preamplifier, 22...Jopper, 23...Thermometer, 24
...(1 other person)
Claims (1)
、この開口部分に電子冷却素子上に取付けた赤外線検出
素子を配置するとともに、この赤外線検出素子に前記第
１の凹面鏡にて反射された赤外線を集光させる第２の凹
面鏡を第１の凹面鏡と対向して設けたことを特徴とする
赤外線検出装置。The central part of the first concave mirror facing the high temperature atmosphere is opened, and an infrared detection element mounted on the electronic cooling element is disposed in this opening part, and the infrared radiation detected by the first concave mirror is reflected by the infrared detection element. An infrared detection device characterized in that a second concave mirror for condensing infrared rays is provided opposite to the first concave mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63323723A JPH02170020A (en) | 1988-12-23 | 1988-12-23 | Infrared ray detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63323723A JPH02170020A (en) | 1988-12-23 | 1988-12-23 | Infrared ray detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02170020A true JPH02170020A (en) | 1990-06-29 |
Family
ID=18157887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63323723A Pending JPH02170020A (en) | 1988-12-23 | 1988-12-23 | Infrared ray detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02170020A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06201474A (en) * | 1990-12-07 | 1994-07-19 | Ag Processing Technol Inc | Bi-channel radiation detector |
-
1988
- 1988-12-23 JP JP63323723A patent/JPH02170020A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06201474A (en) * | 1990-12-07 | 1994-07-19 | Ag Processing Technol Inc | Bi-channel radiation detector |
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