JPS61186826A - Thermal imaging device - Google Patents

Thermal imaging device

Info

Publication number
JPS61186826A
JPS61186826A JP60026944A JP2694485A JPS61186826A JP S61186826 A JPS61186826 A JP S61186826A JP 60026944 A JP60026944 A JP 60026944A JP 2694485 A JP2694485 A JP 2694485A JP S61186826 A JPS61186826 A JP S61186826A
Authority
JP
Japan
Prior art keywords
sensor array
infrared
infrared sensor
thermal imaging
parallel
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
Application number
JP60026944A
Other languages
Japanese (ja)
Inventor
Ryoichi Takayama
良一 高山
Kenji Iijima
賢二 飯島
Yoshihiro Tomita
佳宏 冨田
Ichiro Ueda
一朗 上田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60026944A priority Critical patent/JPS61186826A/en
Publication of JPS61186826A publication Critical patent/JPS61186826A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/08Optical arrangements
    • G01J5/0803Arrangements for time-dependent attenuation of radiation signals
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/08Optical arrangements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/08Optical arrangements
    • G01J5/0803Arrangements for time-dependent attenuation of radiation signals
    • G01J5/0804Shutters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/08Optical arrangements
    • G01J5/0803Arrangements for time-dependent attenuation of radiation signals
    • G01J5/0805Means for chopping radiation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/48Thermography; Techniques using wholly visual means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077Imaging

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiation Pyrometers (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

PURPOSE:To obtain an accurate image signal corresponding to the temperature distribution of a body to be measured by delaying output signals of respective element groups of an infrared sensor array successively and converting the output signals of the respective element groups from parallel to serial at timing corresponding to the delay time. CONSTITUTION:An infrared modulator 3 which intermits infrared rays radiated from the body to be measured at a specific frequency (f) is rotated by a motor 2 and consists of a nontransmission body 1 which has a transmission part. The modulated infrared rays are image-formed on the infrared sensor array 4 arranged on a line at right angles to the rotating shaft of the motor 2 through an infrared optical system 5. Then, the output signals of the element group 14 (elements 1-n) of the infrared sensor array 4 are delayed successively by time DELTAt=1/(2f.n) and impressed to the control input of the parallel-series converting circuit 12 of a signal processing part 9 and converted from parallel to serial corresponding to the delay time DELTAt. Then, the temperature distribution of the object body is displayed 11 under the control of a CPU as a data image signal which is A/D-converted 7 there and stored in an image memory 10.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は焦電型赤外線センサアレイを用いた熱画像装置
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a thermal imaging device using a pyroelectric infrared sensor array.

従来の技術 熱画像装置には、赤外線を光量子として検出する量子型
検出器あるいは熱として吸収して素子の温度変化を電気
信号に変換する熱望検出器が用いられる。
Conventional thermal imaging devices use quantum detectors that detect infrared rays as photons or aspiration detectors that absorb infrared rays as heat and convert temperature changes of an element into electrical signals.

量子型検出器は高感度で、応答が速く、二次元走査鏡と
組合せて熱画像装置として開発されている。この量子型
検出器は常温では10μm帯の赤外線を検出できず、液
体窒素等で冷却しなければならない。
Quantum detectors have high sensitivity and quick response, and have been developed as thermal imaging devices in combination with two-dimensional scanning mirrors. This quantum detector cannot detect infrared rays in the 10 μm band at room temperature and must be cooled with liquid nitrogen or the like.

熱望検出器は、応答が遅いが、常温動作が可能で、比較
的簡単な装置で使用できる。
Although the aspiration detector has a slow response, it can operate at room temperature and can be used with relatively simple equipment.

熱望検出器のなかでも、焦電素子は高感度で、高速応答
用にも使用可能である。しかし、焦電素子は温度変化率
に比例した電気信号を出力するので、入射赤外線に変調
をかける必要がある。
Among aspiration detectors, pyroelectric devices have high sensitivity and can be used for fast response. However, since the pyroelectric element outputs an electrical signal proportional to the rate of temperature change, it is necessary to modulate the incident infrared rays.

焦電素子を用いた熱画像装置には、焦電型赤外線ビジコ
ンと焦電型固体赤外線センサアレイを用いたものがある
。前者は、電子ビーム走査によって信号読出しを行なう
ため、高電圧装置が必要で、寿命が短かい等の欠点を有
する。一方、後者は一層の小型化・長寿命化・高分解能
を可能とする。
Thermal imaging devices using pyroelectric elements include those using a pyroelectric infrared vidicon and a pyroelectric solid-state infrared sensor array. The former method requires a high-voltage device because the signal is read out by electron beam scanning, and has drawbacks such as short life. On the other hand, the latter enables further miniaturization, longer life, and higher resolution.

しかし、素子作製上から微細配列・信号取出し方法等が
困難であり、高密度で100エレメント以上配列された
ものは開発途上である。
However, from the viewpoint of device fabrication, fine arrangement, signal extraction methods, etc. are difficult, and devices with a high-density arrangement of 100 or more elements are still under development.

例えば、特開昭59−15379号公報には、焦電QI
Jニアアレイと一次元走査反射鏡との組合せによる熱画
像装置が提案されている。
For example, in Japanese Patent Application Laid-Open No. 59-15379, pyroelectric QI
A thermal imaging device using a combination of a J near array and a one-dimensional scanning reflector has been proposed.

発明が解決しようとする問題点 焦電素子は熱望の赤外線検出器なので、量子型検出器は
ど高速応答特性は良くない。実時間の熱画像を実現する
ために、例えば変調周波数をf=焦電型赤外線センサア
レイの各素子群の出力信号は、飽和していないから、各
素子群の出力信号を並直列変換するタイミングのずれに
より、並直列変換された信号は、真の信号値より時間と
ともに次第に大きくなる問題があった。そのために各素
子群全てにサンプルホールドあるいはピークホールド回
路を設けて後、並直列変換することが行なわれたり、多
数の遅延回路が必要であった。したがって上記回路に用
いる回路部品点数は著しく多数に及んだ。
Problems to be Solved by the Invention Since a pyroelectric element is an aspirational infrared detector, a quantum detector does not have good high-speed response characteristics. In order to realize a real-time thermal image, for example, the modulation frequency is f = the output signal of each element group of the pyroelectric infrared sensor array is not saturated, so the timing of parallel-serial conversion of the output signal of each element group is determined. Due to this shift, there is a problem in that the parallel-serial converted signal gradually becomes larger than the true signal value over time. For this purpose, sample-hold or peak-hold circuits are provided in each element group, and then parallel-to-serial conversion is performed, or a large number of delay circuits are required. Therefore, the number of circuit components used in the above circuit is extremely large.

問題点を解決するための手段 本発明は上記問題点を解決するため、赤外線センサアレ
イの素子群の各出力信号を一定時間毎遅延させる赤外線
変調器と、上記一定時間毎に対応して各素子群の出力信
号を並直列変換する並直列変換回路とを有するものであ
る。
Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an infrared modulator that delays each output signal of the element group of the infrared sensor array at fixed time intervals, and an infrared modulator that delays each output signal of the element group of the infrared sensor array at fixed time intervals. and a parallel-to-serial conversion circuit for parallel-to-serial conversion of the output signals of the group.

作  用 本発明は、赤外線変調器により、赤外線センサアレイの
各素子群の出力信号を順次遅延させ、その遅延時間に対
応したタイミングで、各素子群の出力信号を並列変換す
るものであるから、被測定物の温度分布に対応した正確
な画像信号の提供を実現できるとともに、回路部品点数
の大幅な削減が可能となる。
Function The present invention uses an infrared modulator to sequentially delay the output signals of each element group of an infrared sensor array, and converts the output signals of each element group into parallel at a timing corresponding to the delay time. It is possible to provide accurate image signals corresponding to the temperature distribution of the object to be measured, and it is also possible to significantly reduce the number of circuit components.

実施例 第1図及び第2図は本発明の熱画像装置の一笑例のブロ
ック図である。
Embodiment FIGS. 1 and 2 are block diagrams of an example of a thermal imaging apparatus according to the present invention.

所定の周波数:fで被測定物(図示せず)から放射され
る赤外線を断続する赤外線変調器3は、モータ2と透光
部を有する非透過体1より構成される。モータ2により
回転する上記非透過体1で変調された赤外線は、赤外線
光学系5により赤外線センサアレイ4に結像される。上
記赤外線センサアレイ4は、モータ2の回転軸の方向と
直交する方向にライン状に配置されている。つまり、上
記非透過体が図示されている方向に回転するとき、上記
赤外線センサアレイ4の素子群1〜nには素子1,2.
・・・・・・nの順に順次赤外線が照射される。
An infrared modulator 3, which intermittents infrared rays emitted from an object to be measured (not shown) at a predetermined frequency f, is composed of a motor 2 and a non-transparent body 1 having a transparent part. The infrared rays modulated by the non-transmissive body 1 rotated by the motor 2 are imaged on the infrared sensor array 4 by the infrared optical system 5. The infrared sensor array 4 is arranged in a line in a direction perpendicular to the direction of the rotation axis of the motor 2. That is, when the non-transmissive body rotates in the illustrated direction, the elements 1, 2, .
...Infrared rays are irradiated sequentially in the order of n.

したがって、各素子群1〜nの出力信号は、第順次遅延
される。
Therefore, the output signals of each element group 1 to n are sequentially delayed.

このように、Δtの時間毎遅延された各素子群の出力信
号は、第3図すに示したやはりΔtだけ順次遅延された
コントロール入力信号1,2.・・・・・・nを並直列
変換回路5のコントロール入力に印加することにより、
Δtの遅延時間に対応して並直列変換される。
In this way, the output signals of each element group delayed by Δt are the control input signals 1, 2, . . . shown in FIG. 3, which are also sequentially delayed by Δt. By applying n to the control input of the parallel-to-serial conversion circuit 5,
Parallel-to-serial conversion is performed corresponding to a delay time of Δt.

上記のタイミングで並直列変換する並直列変換回路5と
、その出力信号を増幅するアンプ6と、AD変換器7で
信号処理部9は構成されている。
The signal processing unit 9 includes a parallel-to-serial conversion circuit 5 that performs parallel-to-serial conversion at the above timing, an amplifier 6 that amplifies its output signal, and an AD converter 7.

10は、AD変換器7でデジタル変換された信号を格納
する画像メモリで、11はメモリ10に格納されたデー
タを画像信号として被測定物の湿度分布を表示する表示
装置である。8はCPUで、前記赤外線変調器3の周期
に同期して、信号処理部9をコントロールする。また、
画像メモIJ 10、表示部11にも指令を出す。
10 is an image memory that stores signals digitally converted by the AD converter 7, and 11 is a display device that displays the humidity distribution of the object to be measured using the data stored in the memory 10 as an image signal. A CPU 8 controls the signal processing section 9 in synchronization with the cycle of the infrared modulator 3. Also,
Commands are also issued to the image memo IJ 10 and the display unit 11.

次に、本発明の他の実施例について説明する。Next, other embodiments of the present invention will be described.

第4図a、bは、赤外線変調器と赤外センサアレイの関
係を示す構成図である。
FIGS. 4a and 4b are configuration diagrams showing the relationship between the infrared modulator and the infrared sensor array.

複数の透光部11を有する円筒形の非透過体1と、円筒
形の底面の中心軸に相当する位置に回転軸をもつモータ
2とで、赤外線変調器が構成される。赤外線センサアレ
イ4は、回転する非透過体1と連結されていないセンサ
ケース24に封入されており、モータ2の回転軸の方向
と直交する方向にライン状に配置されている。
An infrared modulator is constituted by a cylindrical non-transparent body 1 having a plurality of transparent parts 11 and a motor 2 having a rotating shaft at a position corresponding to the central axis of the bottom surface of the cylinder. The infrared sensor array 4 is enclosed in a sensor case 24 that is not connected to the rotating non-transparent body 1, and is arranged in a line in a direction perpendicular to the direction of the rotation axis of the motor 2.

上記の構成により、素子群14の各素子には正確に順次
一定の時間遅れをもって、赤外線が照射される。したが
って、各素子の出力は、一定の遅延時間で正確な信号と
なるばかりでなく、極めて小型な構成が実現できる。
With the above configuration, each element of the element group 14 is irradiated with infrared rays accurately and sequentially with a fixed time delay. Therefore, the output of each element not only becomes an accurate signal with a constant delay time, but also an extremely compact configuration can be realized.

発明の効果 以上、木発明は極めて簡単な構成で、赤外線センサアレ
イの素子数が増すとともに増大する回路部品点数を大幅
に減少することをi15]′能とし、被測定物の温度分
布に対応した正確な画像信号の提供を実現するものであ
る。
More than the effects of the invention, the invention has an extremely simple structure that can significantly reduce the number of circuit components that increase as the number of elements in an infrared sensor array increases, and can correspond to the temperature distribution of the object to be measured. This realizes the provision of accurate image signals.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例における熱画像装置の赤外線
変調器と赤外線センサアレイの関係を示す配置図、第2
図は同実施例のブロック図、第3図a、bは同実施例の
タイミングを表わす信号波形図、第4図a、bは木発明
の他の実施例における赤外線変調器と赤外線センサアレ
イの関係を示す配置図である。 1・・・・・・非透過体、5・・・・・・並直列変換回
路、11・・・・・・透光部、了・・・・・・AD変換
器、3・・・・・・赤外線変調器、9・・・・・−信号
処理部、4・・・・・・赤外線センサアレイ、24・・
・・・・センサケース、14・山・・素子群。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名/−
−−卵を霞)ト 第1図     t−6−タ 第21!1 第3図
FIG. 1 is a layout diagram showing the relationship between an infrared modulator and an infrared sensor array of a thermal imaging device according to an embodiment of the present invention, and FIG.
The figure is a block diagram of the same embodiment, Figures 3a and 3b are signal waveform diagrams showing the timing of the same embodiment, and Figures 4a and b are of an infrared modulator and an infrared sensor array in another embodiment of the invention. It is a layout diagram showing the relationship. 1...Non-transparent body, 5...Parallel-serial conversion circuit, 11...Transparent part, End...AD converter, 3... ...Infrared modulator, 9...-signal processing unit, 4...Infrared sensor array, 24...
...Sensor case, 14. Mountain...Element group. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Egg wo Kasumi) Fig. 1 t-6-Ta No. 21!1 Fig. 3

Claims (4)

【特許請求の範囲】[Claims] (1)焦電型赤外線センサアレイと、赤外線変調器と、
赤外線光学系と、前記焦電型赤外線センサアレイを構成
する各素子群の出力を処理する信号処理部と、前記信号
処理部の出力信号に基づいて被測定物の温度分布を表示
する表示装置とを備え、前記赤外線変調器により前記素
子群の各出力信号を一定時間毎遅延させ、その一定時間
毎に対応したパルスにより、前記素子群の各出力信号を
並直列変換する回路を信号処理部に有することを特徴と
する熱画像装置。
(1) A pyroelectric infrared sensor array, an infrared modulator,
an infrared optical system, a signal processing section that processes the output of each element group constituting the pyroelectric infrared sensor array, and a display device that displays the temperature distribution of the measured object based on the output signal of the signal processing section. , and a signal processing unit includes a circuit that delays each output signal of the element group by the infrared modulator at fixed time intervals, and converts each output signal of the element group from parallel to serial using pulses corresponding to the fixed time intervals. A thermal imaging device comprising:
(2)焦電型赤外線センサアレイが、リニアセンサアレ
イであって表示装置が一次元の温度分布を表示すること
を特徴とする特許請求の範囲第1項記載の熱画像装置。
(2) The thermal imaging device according to claim 1, wherein the pyroelectric infrared sensor array is a linear sensor array, and the display device displays a one-dimensional temperature distribution.
(3)焦電型赤外線センサアレイが、赤外線変調器の有
するモータの回転軸の方向と直交する方向にライン状配
列されたことを特徴とする特許請求の範囲第2項記載の
熱画像装置。
(3) The thermal imaging device according to claim 2, wherein the pyroelectric infrared sensor array is arranged in a line in a direction perpendicular to the direction of the rotation axis of the motor included in the infrared modulator.
(4)モータが複数の透光部をもつ用筒形の非透過体と
、前記円筒形の底面の中心軸に相当する位置に前記非透
過体と連結した回転軸とを有し、前記円筒形の非透過体
の内部に焦電型赤外線センサアレイが配置されたことを
特徴とする特許請求の範囲第3項記載の熱画像装置。
(4) The motor has a cylindrical non-transparent body having a plurality of transparent parts, and a rotating shaft connected to the non-transmissive body at a position corresponding to the central axis of the cylindrical bottom surface, and 4. The thermal imaging device according to claim 3, wherein a pyroelectric infrared sensor array is disposed inside the shaped non-transparent body.
JP60026944A 1985-02-14 1985-02-14 Thermal imaging device Pending JPS61186826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60026944A JPS61186826A (en) 1985-02-14 1985-02-14 Thermal imaging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60026944A JPS61186826A (en) 1985-02-14 1985-02-14 Thermal imaging device

Publications (1)

Publication Number Publication Date
JPS61186826A true JPS61186826A (en) 1986-08-20

Family

ID=12207261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60026944A Pending JPS61186826A (en) 1985-02-14 1985-02-14 Thermal imaging device

Country Status (1)

Country Link
JP (1) JPS61186826A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993000576A1 (en) * 1991-06-24 1993-01-07 Matsushita Electric Industrial Co., Ltd. Device for sensing thermal image
EP0612988A2 (en) * 1993-02-26 1994-08-31 Matsushita Electric Industrial Co., Ltd. Temperature distribution measuring device and measuring method
US5365065A (en) * 1992-10-14 1994-11-15 Power Joan F Sensitive interferometric parallel thermal-wave imager
US5528038A (en) * 1991-05-07 1996-06-18 Matsushita Electric Industrial Co., Ltd. Temperature distribution measurement apparatus and its application to a human body detecting system
US5567052A (en) * 1992-08-03 1996-10-22 Matsushita Electric Industrial Co., Ltd. Temperature distribution measurement apparatus
US6758595B2 (en) * 2000-03-13 2004-07-06 Csem Centre Suisse D' Electronique Et De Microtechnique Sa Imaging pyrometer
US7604399B2 (en) * 2007-05-31 2009-10-20 Siemens Energy, Inc. Temperature monitor for bus structure flex connector
US12092518B2 (en) 2021-04-19 2024-09-17 The Johns Hopkins University High power laser profiler

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5528038A (en) * 1991-05-07 1996-06-18 Matsushita Electric Industrial Co., Ltd. Temperature distribution measurement apparatus and its application to a human body detecting system
WO1993000576A1 (en) * 1991-06-24 1993-01-07 Matsushita Electric Industrial Co., Ltd. Device for sensing thermal image
US5567052A (en) * 1992-08-03 1996-10-22 Matsushita Electric Industrial Co., Ltd. Temperature distribution measurement apparatus
US5365065A (en) * 1992-10-14 1994-11-15 Power Joan F Sensitive interferometric parallel thermal-wave imager
EP0612988A2 (en) * 1993-02-26 1994-08-31 Matsushita Electric Industrial Co., Ltd. Temperature distribution measuring device and measuring method
EP0612988A3 (en) * 1993-02-26 1995-06-21 Matsushita Electric Ind Co Ltd Temperature distribution measuring device and measuring method.
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