JP2002206968A - Temperature distribution measuring apparatus - Google Patents

Temperature distribution measuring apparatus

Info

Publication number
JP2002206968A
JP2002206968A JP2001001170A JP2001001170A JP2002206968A JP 2002206968 A JP2002206968 A JP 2002206968A JP 2001001170 A JP2001001170 A JP 2001001170A JP 2001001170 A JP2001001170 A JP 2001001170A JP 2002206968 A JP2002206968 A JP 2002206968A
Authority
JP
Japan
Prior art keywords
strip
mirror
image
temperature distribution
infrared camera
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
JP2001001170A
Other languages
Japanese (ja)
Inventor
Toshinori Mori
敏則 森
Osamu Ibaraki
修 茨木
Akira Ichimura
顕 市村
Katsuaki Kamei
勝昭 亀井
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.)
NTT Advanced Technology Corp
Original Assignee
NTT Advanced Technology Corp
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 NTT Advanced Technology Corp filed Critical NTT Advanced Technology Corp
Priority to JP2001001170A priority Critical patent/JP2002206968A/en
Priority to DE2002100540 priority patent/DE10200540A1/en
Publication of JP2002206968A publication Critical patent/JP2002206968A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/082Aligning the head or the light source relative to the record carrier otherwise than during transducing, e.g. adjusting tilt set screw during assembly of head
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/0857Arrangements for mechanically moving the whole head
    • G11B7/08582Sled-type positioners

Abstract

PROBLEM TO BE SOLVED: To display a distribution of temperatures over an entire printed board even with a slight shift of a setting position by facilitating the setting of the positions of a mirror unit and an infrared camera in a conventional temperature distribution measuring apparatus. SOLUTION: A mark that can be recognized by the infrared camera is provided on a portion of the mirror strip of the mirror unit and is detected each time the mirror strip moves. Based on this movement, the image data of the mirror strip are specified whenever necessary from total viewing field image data captured by the infrared camera to synthesize an image of the temperature distribution of one printed board.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は,電子機器内部に実
装されたプリント基板の温度分布を測定する温度分布測
定器に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature distribution measuring device for measuring a temperature distribution of a printed circuit board mounted inside an electronic device.

【0002】[0002]

【従来の技術】電子情報機器の高速化及び高密度化に伴
い、電子情報機器内部の温度設計が重要になってきてい
る。即ち、電子情報機器内部には多数のLSIなどの発
熱部品を搭載した多数のプリント基板が実装されてお
り、温度設計を誤ると、正常な動作が損なわれたり、故
障の原因になる。このため、これらの実働状態でのプリ
ント基板の温度分布を正確に把握し、設計にフィードバ
ックすることが必要となる。これらのプリント板は小型
高密度実装とするためブックシェルフ型に実装されてい
ることが多い。この場合の装置実働状態でのプリント基
板温度分布を効率よく測定する機器として、特開平10
−206241号に示される装置が使われている。
2. Description of the Related Art With the increase in speed and density of electronic information equipment, the temperature design inside the electronic information equipment has become important. That is, a large number of printed circuit boards on which a large number of heat-generating components such as LSIs are mounted are mounted inside the electronic information equipment. If the temperature design is incorrect, normal operation is impaired or a failure is caused. For this reason, it is necessary to accurately grasp the temperature distribution of the printed circuit board in these working states, and to feed it back to the design. These printed boards are often mounted in a bookshelf type in order to achieve a compact and high-density mounting. In this case, a device for efficiently measuring the temperature distribution of the printed circuit board in the working state of the apparatus is disclosed in
The device shown in US Pat.

【0003】この装置は、第1図に示すように、ブック
シェルフ型サブラックに実装されたプリント基板の温度
分布をサブラック前面から測定するために、プリント基
板に実装された部品から放射される熱赤外線をプリント
基板挿抜方向に対して45°に傾斜した短冊状の鏡によ
りプリント基板挿入口方向へ反射させ、さらに短冊状の
鏡をプリント基板挿入口方向と平行に駆動し、サブラッ
クのプリント基板挿入口前方に置いた赤外線カメラで短
冊状の温度分布画像として測定した蓄積データを、パソ
コンによる画像処理によってプリント基板面全体に展開
した温度分布画像として合成する装置である。
In this apparatus, as shown in FIG. 1, in order to measure the temperature distribution of a printed circuit board mounted on a bookshelf type subrack from the front of the subrack, radiation is radiated from components mounted on the printed circuit board. The thermal infrared rays are reflected toward the printed circuit board insertion direction by a strip-shaped mirror inclined at 45 ° to the printed circuit board insertion / removal direction, and the strip-shaped mirror is driven in parallel with the printed circuit board insertion direction to print the subrack. This is a device that combines accumulated data measured as a strip-shaped temperature distribution image with an infrared camera placed in front of the board insertion slot as a temperature distribution image developed on the entire printed circuit board surface by image processing by a personal computer.

【0004】図1によりこの種の温度分布測定器の全体
構成及び測定原理を示す。測定すべきプリント基板1は
サブラック2に収容されており、そのなかにミラーユニ
ット3が挿入されている。ミラーユニット3には短冊状
鏡4が内蔵されている。サブラック2の前方には赤外線
カメラ5がカメラ固定台に固定されている。赤外線カメ
ラ5で撮影した全視野熱画像は、赤外線カメラ5内の温
度演算部で温度情報として計算しデジタル情報に変換さ
れ、パソコン7へ送信される。パソコン7では、受け取
ったデータを記録し、これから短冊状鏡4で反射させた
熱画像のみを選択する。短冊状鏡4の移動ごとに、この
熱画像を蓄積合成することにより、プリント基板1枚分
の温度分布画像が得られる。
FIG. 1 shows the overall configuration and principle of measurement of this type of temperature distribution measuring instrument. A printed circuit board 1 to be measured is housed in a subrack 2 into which a mirror unit 3 is inserted. The mirror unit 3 incorporates a strip mirror 4. An infrared camera 5 is fixed to a camera fixing base in front of the subrack 2. The full-field thermal image taken by the infrared camera 5 is calculated as temperature information by a temperature calculation unit in the infrared camera 5, converted into digital information, and transmitted to the personal computer 7. In the personal computer 7, the received data is recorded, and only the thermal image reflected by the strip mirror 4 is selected. By accumulating and synthesizing this thermal image each time the strip mirror 4 moves, a temperature distribution image for one printed circuit board can be obtained.

【0005】従来の装置では、初期設定段階で短冊状鏡
の画像範囲を設定(画像データの番地範囲を固定)する
方法で、短冊状鏡が移動しても常に同じ画像データの番
地範囲を短冊状鏡の画像範囲データと定義する方法であ
った。このため、赤外線カメラの全視野画像の一定位置
から短冊状鏡の温度分布画像範囲が動かないように、短
冊状鏡が移動してもミラーユニットと赤外線カメラの設
定位置が常に赤外線カメラの光軸に平行になるように設
置することが必要である。即ち、ミラーユニットが光軸
に平行に移動するように設定できないと短冊状鏡の赤外
線カメラ全視野の画像範囲が定義した空間から外れたと
ころに移動した状態で撮影することになり、プリント基
板全体の温度分布画像が得られないことになる。これを
第2図により説明する。短冊状鏡4が地点aの位置(図
中4aで示す)で、赤外線カメラ5aで写した全視野画
像8aからこのときの短冊状鏡で反射した画像9aをも
とに収録すべきデータ番地範囲16の位置を決める。
In the conventional apparatus, a method of setting the image range of the strip-shaped mirror at the initial setting stage (fixing the address range of the image data) is adopted. It was defined as the image range data of a mirror. For this reason, the setting position of the mirror unit and the infrared camera is always set to the optical axis of the infrared camera even if the rectangular mirror moves so that the temperature distribution image range of the rectangular mirror does not move from a certain position of the full-field image of the infrared camera. It is necessary to install it so that it is parallel to. In other words, if the mirror unit cannot be set to move parallel to the optical axis, the image will be taken in a state where the image range of the entire field of view of the infrared camera of the rectangular mirror moves out of the defined space, and the entire printed circuit board will be photographed. Cannot be obtained. This will be described with reference to FIG. Data address range to be recorded based on the image 9a reflected by the strip mirror at this time from the full-field image 8a taken by the infrared camera 5a at the position of the strip mirror 4 at the position of the point a (indicated by 4a in the figure) Determine the position of 16.

【0006】なお、この全視野画像はサブラック2の前
面パネル部分の熱画像であり、この中に部分的にミラー
ユニット3を通したプリント基板の温度分布の熱画像が
写っている。赤外線カメラ5の設定のための移動と短冊
状鏡の動き(光軸)が完全に平行でない場合には、短冊
状鏡4が地点bへ移動した時に、赤外線カメラ5bが撮
影する全視野画像8bでは、その時の短冊状鏡4で反射
された温度分布画像9bが初期設定のデータ番地範囲1
6から外れた位置に移動することになり、データ収録が
できなくなる。即ちパソコン7は、収録すべきデータ番
地範囲16のデータを短冊状鏡4bからのデータとみな
して収録することになる。
The full-field image is a thermal image of the front panel portion of the subrack 2, and a thermal image of the temperature distribution of the printed circuit board partially passing through the mirror unit 3 is included therein. If the movement for setting the infrared camera 5 and the movement (optical axis) of the strip mirror are not completely parallel, the full-field image 8b captured by the infrared camera 5b when the strip mirror 4 moves to the point b Then, the temperature distribution image 9b reflected by the strip mirror 4 at that time is the data address range 1 in the initial setting.
Therefore, the data is moved to a position deviated from 6, and data cannot be recorded. That is, the personal computer 7 records the data in the data address range 16 to be recorded as data from the strip mirror 4b.

【0007】すなわち、従来の温度分布測定器では、短
冊状鏡の画像範囲は初期設定において固定的に定義し
て、短冊状鏡が移動しても常に初期設定の番地領域の画
像データを短冊状鏡からの温度分布画像とみなして,プ
リント基板1枚の温度分布画像を合成する方法が用いら
れた。
That is, in the conventional temperature distribution measuring device, the image range of the strip mirror is fixedly defined in the initial setting, and the image data in the initially set address area is always strip-shaped even when the strip mirror moves. A method of synthesizing a temperature distribution image of one printed circuit board by regarding it as a temperature distribution image from a mirror was used.

【0008】[0008]

【発明が解決しようとする課題】本発明は上記の欠点を
改善するために提案されたもので,その目的は,従来の
前記温度分布測定器において、ミラーユニットと赤外線
カメラの位置設定を容易にし、多少の設定位置のずれに
対してもプリント基板全体の温度分布表示を可能とする
ことにある。
SUMMARY OF THE INVENTION The present invention has been proposed in order to improve the above-mentioned drawbacks, and an object of the present invention is to make it easy to set the position of the mirror unit and the infrared camera in the conventional temperature distribution measuring instrument. Another object of the present invention is to make it possible to display the temperature distribution of the entire printed circuit board even when the set position is slightly shifted.

【0009】[0009]

【課題を解決するための手段】上記の課題を解決するた
め,本発明の温度分布測定器は,LSIなどの発熱部品
を多数搭載したプリント基板の温度分布を、ブックシェ
ルフ型サブラックに実装された実働状態でサブラック前
面から測定するために、プリント基板の挿抜方向に平行
に可動する短冊状の鏡を内蔵した板状構造物(ミラーユ
ニット)をサブラック内の測定対象のプリント基板面に
対向するように挿入し、当該短冊状の鏡をプリント基板
挿抜方向に対して45°に傾斜させ、当該短冊状の鏡に
よりプリント基板に実装された部品から放射される熱赤
外線をプリント基板挿入口方向へ反射して、サブラック
のプリント基板挿入口前方に置いた赤外線カメラで短冊
状温度分布画像として計測し、さらに短冊状の鏡をプリ
ント基板挿抜方向に一定距離を移動しながら、短冊状の
温度分布画像をパソコンに逐次蓄積し、蓄積した短冊状
の温度分布画像データからパソコンによる画像処理でプ
リント基板面全体に展開した温度分布画像として合成す
る温度分布測定器において、当該短冊状の鏡を移動して
得られる熱画像のみを切り出すための画像処理にあた
り、短冊状の鏡が任意の位置で停止した時の赤外線カメ
ラで撮影する画像から短冊状の鏡から反射した画像情報
のみを取り出す位置を特定することにより、短冊状の鏡
をフルに動かした時の画像データを取り出す位置を決め
る機能を有することを特徴とする。
In order to solve the above-mentioned problems, a temperature distribution measuring device according to the present invention is provided by mounting a temperature distribution of a printed circuit board having a large number of heat-generating components such as an LSI on a bookshelf type subrack. In order to measure from the front of the subrack in the working state, a plate-like structure (mirror unit) with a built-in strip-shaped mirror that can move in parallel to the The strip-shaped mirror is tilted at 45 ° with respect to the printed board insertion / removal direction, and thermal infrared rays radiated from components mounted on the printed board by the strip-shaped mirror are inserted into the printed board insertion port. Reflected in the direction, measured as a strip-shaped temperature distribution image with an infrared camera placed in front of the subrack printed circuit board insertion port, and then the strip-shaped mirror was inserted into and removed from the printed circuit board. A temperature distribution that sequentially accumulates strip-shaped temperature distribution images in a personal computer while moving a certain distance, and combines the accumulated strip-shaped temperature distribution image data into a temperature distribution image developed on the entire printed circuit board surface by image processing using a personal computer. In a measuring instrument, in image processing for cutting out only a thermal image obtained by moving the strip-shaped mirror, a strip-shaped mirror is taken from an image taken by an infrared camera when the strip-shaped mirror stops at an arbitrary position. It is characterized by having a function of determining a position for extracting image data when the strip-shaped mirror is fully moved by specifying a position for extracting only image information reflected from the mirror.

【0010】また、赤外線カメラで撮影する画像の中か
ら短冊状の鏡からの画像位置を識別するために特定のマ
ークを写し、このマークを基に、短冊状の鏡からの画像
の位置を検出することができるようにしたことを特徴と
する。
[0010] A specific mark is printed on the image taken by the infrared camera in order to identify the image position from the strip-shaped mirror, and the position of the image from the strip-shaped mirror is detected based on this mark. It is characterized by being able to do.

【0011】また、短冊状の鏡からの画像位置を識別す
るためのマークにおいて、プリント基板挿抜方向と平行
に駆動する短冊状鏡の一部に赤外線カメラで撮影できる
赤外温度を発生する機構を付けたことを特徴とする。
A mechanism for generating an infrared temperature which can be photographed by an infrared camera is provided in a part of a strip mirror driven in parallel with a printed board insertion / removal direction in a mark for identifying an image position from the strip mirror. It is characterized by having attached.

【0012】また、赤外線カメラは短冊状の鏡の移動と
同期して移動することを特徴とする。すなわち、ミラー
ユニットの短冊状鏡の一部に赤外線カメラで識別できる
マークを付け、短冊状鏡が移動する毎にこのマークを検
出し、これを元に、赤外線カメラで捕らえた全視野画像
データから短冊状鏡の画像データを逐次特定してプリン
ト基板一枚の温度分布画像を合成することを特徴とす
る。
Further, the infrared camera moves in synchronization with the movement of the strip-shaped mirror. That is, a mark that can be identified by an infrared camera is attached to a part of the strip mirror of the mirror unit, and this mark is detected each time the strip mirror moves, and based on this, from the full-field image data captured by the infrared camera, It is characterized in that the image data of the strip mirror is sequentially specified and a temperature distribution image of one printed circuit board is synthesized.

【0013】また、短冊状の鏡が任意の異なる2地点で
停止した時の赤外線カメラで撮影する画像から、短冊状
の鏡から反射した画像情報のみを取り出す位置を特定
し、当該任意の2地点と当該画像情報のみを取り出す位
置とを予め収録し、これら2地点と当該画像情報のみを
取り出す位置から、他の任意の地点において、短冊状の
鏡の位置と当該短冊状の鏡から反射した画像情報のみを
取り出す位置を特定する関係式を導き、この関係式を使
って、短冊状の鏡をフルに動かした時の画像データを取
り出す位置を決めることを特徴とする。関係式を使うこ
とにより、効率よく測定を進めることができる。
[0013] Further, from the image taken by the infrared camera when the strip-shaped mirror stops at any two different points, the position where only the image information reflected from the strip-shaped mirror is extracted is specified. And the position at which only the image information is taken out, and the position of the strip mirror and the image reflected from the strip mirror at any other point from these two points and the position at which only the image information is taken out A relational expression for specifying a position at which only information is extracted is derived, and a position at which image data is extracted when the strip-shaped mirror is fully moved is determined using the relational expression. By using the relational expression, the measurement can be efficiently performed.

【0014】[0014]

【発明の実施の形態】BEST MODE FOR CARRYING OUT THE INVENTION

【実施例】次に本発明の温度分布測定器の実施例につい
て説明する。なお,実施例は一つの例示であって,本発
明の精神を逸脱しない範囲で,種々の変更あるいは改良
を行い得ることは言うまでもない。
Next, an embodiment of the temperature distribution measuring device of the present invention will be described. It should be noted that the embodiment is one example, and it goes without saying that various changes or improvements can be made without departing from the spirit of the present invention.

【0015】先ず、図3により本発明の温度分布測定器
の全体構成を示す。基本的な構成は図1の従来装置と同
じであるが、ミラーユニット3内のスライダブロック部
18に赤外線カメラ5で認識できるマークを追加した点
が構成上で従来構造とは異なる。
First, FIG. 3 shows the overall configuration of the temperature distribution measuring device of the present invention. The basic configuration is the same as that of the conventional apparatus shown in FIG. 1, but differs from the conventional structure in that a mark recognizable by the infrared camera 5 is added to the slider block 18 in the mirror unit 3.

【0016】また、本発明の温度分布測定器では赤外線
カメラ5がカメラスライダ6の中にあり、短冊状鏡4の
前後移動量と同期して赤外線カメラ5もカメラスライダ
6内を移動する。これらの移動の制御はパソコン7が行
なう。赤外線カメラ5で認識できるマークとしては、赤
外発光LDやランプ、抵抗体などが考えられる。最も簡
単なものはニクロム線などの発熱抵抗体である。図3で
はブロック14の前面即ち、赤外線カメラ5に対向する
面に小さな点または線状のヒータ15を付け、短冊状鏡
4の位置を特定するためのマークとする例を示す。な
お、図3には、ブロック14の上下端にヒータ15を取
り付けた例を示したが、短冊状鏡4の反射光を妨げない
範囲であれば取付位置、個所数に制限はない。
Further, in the temperature distribution measuring device of the present invention, the infrared camera 5 is provided in the camera slider 6, and the infrared camera 5 also moves in the camera slider 6 in synchronization with the longitudinal movement of the strip mirror 4. The personal computer 7 controls these movements. Marks that can be recognized by the infrared camera 5 include an infrared light emitting LD, a lamp, and a resistor. The simplest is a heating resistor such as a nichrome wire. FIG. 3 shows an example in which a small point or a linear heater 15 is attached to the front surface of the block 14, that is, the surface facing the infrared camera 5, and is used as a mark for specifying the position of the strip mirror 4. FIG. 3 shows an example in which the heaters 15 are attached to the upper and lower ends of the block 14. However, the attachment position and the number of locations are not limited as long as the reflected light of the strip mirror 4 is not hindered.

【0017】次に本発明の測定原理を図4によって示
す。本発明の温度分布測定器では赤外線カメラ5(図
中、地点a、bにある場合を示す5a、5bで示す)は
カメラスライダ6の中にあり、短冊状鏡4(図中、地点
a、bにある場合を示す4a、4bで示す)の前後移動
量と同期して赤外線カメラ5もカメラスライダ6内を移
動する。これらの移動の制御はパソコン7が行なう。短
冊状鏡4の移動ごとに、この温度分布画像を蓄積合成す
ることにより、プリント基板1枚分の温度分布画像合成
するという基本原理は同じであるが、短冊状鏡4の移動
とともに、選び出す温度分布画像データ範囲を前述のマ
ークを利用して特定するやり方が従来とは異なる。即
ち、赤外線カメラの全視野画像8aには前記ヒータ15
の画像19が含まれており、この画像19を基準とし
て、短冊状鏡4で反射させた温度分布画像9aのデータ
番地範囲(相対番地)16aを決定する。
Next, the measurement principle of the present invention is shown in FIG. In the temperature distribution measuring device according to the present invention, the infrared camera 5 (indicated by 5a and 5b in FIG. 2A) is located in the camera slider 6, and the strip mirror 4 (in FIG. The infrared camera 5 also moves within the camera slider 6 in synchronization with the forward and backward movement amounts of 4a and 4b (showing the case of b). The personal computer 7 controls these movements. The basic principle of synthesizing a temperature distribution image for one printed circuit board by accumulating and synthesizing this temperature distribution image for each movement of the strip mirror 4 is the same. The method of specifying the distribution image data range using the above-mentioned mark is different from the conventional method. That is, the heater 15 is included in the full-field image 8a of the infrared camera.
Based on the image 19, the data address range (relative address) 16a of the temperature distribution image 9a reflected by the strip mirror 4 is determined.

【0018】次に短冊状鏡4が移動したとき、全視野画
像8bからヒータ15の位置を画像認識で探しだし、そ
こから相対データ番地範囲16bを決定し,温度分布画
像としてパソコンに蓄積する。短冊状鏡4を逐次移動す
る毎に、この一連の処理を繰り返すことにより、短冊状
鏡4の移動位置、即ちプリント基板1の部品搭載位置
[「16」を削除する]に対応した温度分布画像10を
合成することができる。
Next, when the strip-shaped mirror 4 moves, the position of the heater 15 is searched for from the full-field image 8b by image recognition, and a relative data address range 16b is determined therefrom and stored in the personal computer as a temperature distribution image. Each time the strip-shaped mirror 4 is sequentially moved, this series of processing is repeated to obtain a temperature distribution image corresponding to the movement position of the strip-shaped mirror 4, that is, the component mounting position [16 is deleted] of the printed circuit board 1. 10 can be synthesized.

【0019】このように、ミラーユニット3内の短冊状
鏡4とカメラスライダ6内の赤外線カメラ5の移動が平
行していなくても、短冊状鏡4の移動ごとに、収録すべ
きデータ範囲を自動追尾して測定することができる。ま
た短冊状鏡4の移動量と赤外線カメラ5の移動量が同期
しているので測定対象とカメラの光学長が一定であるの
で、測定位置による視野のひずみがなく、視野画像の焦
点も一定で鮮明な画像を得ることができる。また、ミラ
ーユニット3及びカメラスライダ6を1度設定して動か
さなければ、内部でスライド移動する短冊状鏡4及び赤
外線カメラ5は、常に同じ相対位置を移動することにな
る。即ち、短冊状鏡の位置(x)、赤外線カメラの全視
野内のヒータ15の画像位置(y)は次の関係式(式
1)であらわされる。 y=Ax+B ---------------------(式1) 従がって、1度、短冊状鏡4及び赤外線カメラ5を予備
走行させ、任意の2箇所(4a),(4b)でヒータ15
の画像を検出し、これにより収録すべきのデータ番地範
囲の番地開始位置(16a)および(16b)とすれば次式、
(式2)、(式3)より定数A,Bが求められる。 (16a)=A(4a)+B ---------------------(式2) (16b)=A(4b)+B ---------------------(式3)
As described above, even if the movement of the strip mirror 4 in the mirror unit 3 and the movement of the infrared camera 5 in the camera slider 6 are not parallel, the data range to be recorded is changed every time the strip mirror 4 moves. Automatic tracking and measurement can be performed. In addition, since the movement amount of the strip mirror 4 and the movement amount of the infrared camera 5 are synchronized, the optical length of the object to be measured and the camera are constant, so that there is no distortion of the visual field due to the measurement position and the focal point of the visual field image is constant. A clear image can be obtained. If the mirror unit 3 and the camera slider 6 are not set and moved once, the strip mirror 4 and the infrared camera 5 that slide inside will always move at the same relative position. That is, the position (x) of the strip mirror and the image position (y) of the heater 15 within the entire field of view of the infrared camera are expressed by the following relational expression (Expression 1). y = Ax + B --------------------- (Equation 1) Accordingly, once the strip mirror 4 and the infrared camera 5 are preliminarily driven, and Heater 15 at two places (4a) and (4b)
Is detected, and the address start positions (16a) and (16b) of the data address range to be recorded are calculated as follows.
The constants A and B are obtained from (Equation 2) and (Equation 3). (16a) = A (4a) + B --------------------- (Equation 2) (16b) = A (4b) + B ----- ---------------- (Equation 3)

【0020】したがって、(式1)式の関係式を1度も
とめれば短冊状鏡4及び赤外線カメラ5を走行させ、各
々の全視野画像8から収録すべきデータ番地範囲のデー
タを選択することにより、正確な温度分布画像を取り出
せることになる。このような予備走行をして短冊状鏡4
の動きに合わせて、取り出すべきデータ番地を定義して
おけば、ヒータ15の画像認識工程が不要なため、測定
時間の短縮ができ、さらにヒータによる被測定物への影
響も回避することができる。
Therefore, once the relational expression of the expression (1) is determined, the strip mirror 4 and the infrared camera 5 are driven to select data in a data address range to be recorded from each full-field image 8. Thereby, an accurate temperature distribution image can be taken out. By performing such preliminary traveling, the strip-shaped mirror 4
If the data address to be taken out is defined in accordance with the movement of, the image recognition process of the heater 15 is not required, so that the measurement time can be reduced and the influence of the heater on the object to be measured can be avoided. .

【0021】[0021]

【発明の効果】以上説明したように、本発明の温度分布
測定器は,ミラーユニットの短冊状鏡の一部に赤外線カ
メラで識別できるマークを付け、短冊状鏡が移動する毎
にこのマークを検出し、これを元に、赤外線カメラで捕
らえた全視野画像データから短冊状鏡の画像データを逐
次特定してプリント基板一枚の温度分布画像を合成する
ができ、カメラスライダ及びミラーユニットの設定が容
易となり、正確なプリント基板上の温度分布を得ること
ができる。
As described above, the temperature distribution measuring device of the present invention attaches a mark that can be identified by an infrared camera to a part of the strip mirror of the mirror unit, and this mark is moved every time the strip mirror moves. Based on this, the image data of the strip mirror can be sequentially identified from the full-field image data captured by the infrared camera, and the temperature distribution image of one printed circuit board can be synthesized. This makes it easy to obtain an accurate temperature distribution on the printed circuit board.

【図面の簡単な説明】[Brief description of the drawings]

【図1】従来方式のプリント基板温度分布の測定原理を
示す図である。
FIG. 1 is a diagram illustrating a principle of measuring a printed circuit board temperature distribution in a conventional method.

【図2】従来方式のプリント基板温度分布の測定におい
て、正しい温度分布が測定できないことを示す図であ
る。
FIG. 2 is a diagram showing that a correct temperature distribution cannot be measured in a conventional method of measuring a printed circuit board temperature distribution.

【図3】本発明の温度分布測定器の全体構成を示す。FIG. 3 shows an overall configuration of a temperature distribution measuring device of the present invention.

【図4】本発明の原理図であって、赤外線カメラで撮影
した全視野画像から、短冊状鏡で反射させた温度分布画
像のみを取り出しかたを説明する図である。
FIG. 4 is a principle view of the present invention and is a diagram for explaining how to extract only a temperature distribution image reflected by a strip mirror from a full-field image captured by an infrared camera.

【符号の説明】[Explanation of symbols]

1 プリント基板 2サブラック 3 ミラーユニット 4 短冊状鏡 5 赤外線カメラ 6 カメラスライダ 7 パソコン 8 赤外線カメラで撮影した全視野画像 9 短冊状鏡で反射させた温度分布画像 10 パソコンで合成したプリント基板の温度分布画像 11ミラーユニットおよびカメラスライダを制御する信
号の流れ 12 赤外線カメラからパソコンに送られてくるデータ
の流れ 13 従来装置のミラーブロック部 14ブロック 15 ヒータ 16 収録するデータ番地範囲 17 発熱部品 18 本発明のミラーブロック部 19 マーク部の画像
DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Subrack 3 Mirror unit 4 Strip mirror 5 Infrared camera 6 Camera slider 7 Personal computer 8 Full-field image taken by infrared camera 9 Temperature distribution image reflected by strip mirror 10 Temperature of printed circuit board synthesized by personal computer Distribution image 11 Signal flow for controlling the mirror unit and camera slider 12 Data flow sent from the infrared camera to the personal computer 13 Mirror block part of the conventional device 14 Block 15 Heater 16 Data address range to be recorded 17 Heating component 18 The present invention Mirror block part 19 Mark part image

フロントページの続き (72)発明者 市村 顕 東京都新宿区西新宿二丁目1番1号 エ ヌ・ティ・ティ・アドバンステクノロジ株 式会社内 (72)発明者 亀井 勝昭 東京都新宿区西新宿二丁目1番1号 エ ヌ・ティ・ティ・アドバンステクノロジ株 式会社内 Fターム(参考) 2G066 AA06 AC07 BA14 BA25 BA27 BC15 BC21 CA02 Continued on the front page (72) Inventor Akira Ichimura 2-1-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo NTT Advanced Technology Corporation (72) Inventor Katsuaki Kamei Nishi-Shinjuku, Shinjuku-ku, Tokyo 2-1-1 1-1 NTT Advanced Technology Co., Ltd. F-term (reference) 2G066 AA06 AC07 BA14 BA25 BA27 BC15 BC21 CA02

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 LSIなどの発熱部品を多数搭載したプ
リント基板の温度分布を、ブックシェルフ型サブラック
に実装された実働状態でサブラック前面から測定するた
めに、プリント基板の挿抜方向に平行に可動する短冊状
の鏡を内蔵した板状構造物(ミラーユニット)をサブラ
ック内の測定対象のプリント基板面に対向するように挿
入し、当該短冊状の鏡をプリント基板挿抜方向に対して
45°に傾斜させ、当該短冊状の鏡によりプリント基板
に実装された部品から放射される熱赤外線をプリント基
板挿入口方向へ反射して、サブラックのプリント基板挿
入口前方に置いた赤外線カメラで短冊状温度分布画像と
して計測し、さらに短冊状の鏡をプリント基板挿抜方向
に一定距離を移動しながら、短冊状の温度分布画像をパ
ソコンに逐次蓄積し、蓄積した短冊状の温度分布画像デ
ータからパソコンによる画像処理でプリント基板面全体
に展開した温度分布画像として合成する温度分布測定器
において、当該短冊状の鏡を移動して得られる熱画像の
みを切り出すための画像処理にあたり、短冊状の鏡が任
意の位置で停止した時の赤外線カメラで撮影する画像か
ら短冊状の鏡から反射した画像情報のみを取り出す位置
を特定することにより、短冊状の鏡をフルに動かした時
の画像データを取り出す位置を決める機能を有すること
を特徴とした温度分布測定器。
1. A method for measuring the temperature distribution of a printed circuit board on which a large number of heat-generating components such as LSIs are mounted from a front surface of a sub-rack in a working state mounted on a bookshelf-type subrack, in parallel with the insertion / removal direction of the printed circuit board. A plate-like structure (mirror unit) containing a movable strip-shaped mirror is inserted so as to face the surface of the printed circuit board to be measured in the subrack, and the strip-shaped mirror is inserted into the printed board insertion / removal direction by 45 degrees. °, the infrared rays emitted from the components mounted on the printed circuit board by the strip-shaped mirror are reflected toward the printed circuit board insertion port, and the infrared camera placed in front of the sub board printed circuit board insertion port uses an infrared camera. The temperature distribution image is measured and the strip-shaped mirror is successively accumulated in the PC while moving the strip-shaped mirror a certain distance in the direction of insertion and removal of the printed circuit board. In a temperature distribution measuring device that synthesizes the stored strip-shaped temperature distribution image data as a temperature distribution image developed on the entire printed circuit board surface by image processing by a personal computer, only a thermal image obtained by moving the strip-shaped mirror is cut out. In the image processing for the strip mirror, specify the position where only the image information reflected from the strip mirror is extracted from the image taken by the infrared camera when the strip mirror stops at an arbitrary position, A temperature distribution measuring device characterized by having a function of determining a position at which image data is taken out when fully moved.
【請求項2】 赤外線カメラで撮影する画像の中から短
冊状の鏡からの画像位置を識別するために特定のマーク
を写し、このマークを基に、短冊状の鏡からの画像の位
置を検出することができるようにしたことを特徴とした
請求項1に記載の温度分布測定器。
2. A specific mark is printed on an image taken by an infrared camera to identify an image position from a strip-shaped mirror, and the position of the image from the strip-shaped mirror is detected based on the mark. The temperature distribution measuring device according to claim 1, wherein the temperature distribution measuring device can be used.
【請求項3】 短冊状の鏡からの画像位置を識別するた
めのマークにおいて、プリント基板挿抜方向と平行に駆
動する短冊状鏡の一部に赤外線カメラで撮影できる赤外
温度を発生する機構を付けたことを特徴とする請求項2
に記載の温度分布測定器。
3. In a mark for identifying an image position from a strip-shaped mirror, a mechanism for generating an infrared temperature which can be photographed by an infrared camera is provided in a part of the strip-shaped mirror driven in parallel with a printed board insertion / removal direction. 3. The method according to claim 2, wherein
The temperature distribution measuring device according to 1.
【請求項4】 赤外線カメラは短冊状の鏡の移動と同
期して移動することを特徴とする請求項1乃至3に記載
の温度分布測定器。
4. The temperature distribution measuring device according to claim 1, wherein the infrared camera moves in synchronization with the movement of the strip-shaped mirror.
【請求項5】 短冊状の鏡が任意の異なる2地点で停止
した時の赤外線カメラで撮影する画像から、短冊状の鏡
から反射した画像情報のみを取り出す位置を特定し、当
該任意の2地点と当該画像情報のみを取り出す位置とを
予め収録し、これら2地点と当該画像情報のみを取り出
す位置から、他の任意の地点において、短冊状の鏡の位
置と当該短冊状の鏡から反射した画像情報のみを取り出
す位置を特定する関係式を導き、この関係式を使って、
短冊状の鏡をフルに動かした時の画像データを取り出す
位置を決めることを特徴とした請求項1乃至4に記載の
温度分布測定器。
5. A position where only image information reflected from a strip-shaped mirror is extracted from an image taken by an infrared camera when the strip-shaped mirror stops at any two different points, and the arbitrary two points are specified. And the position at which only the image information is taken out, and the position of the strip mirror and the image reflected from the strip mirror at any other point from these two points and the position at which only the image information is taken out Derive a relational expression that specifies the location from which to extract information only, and use this relational expression to
5. The temperature distribution measuring device according to claim 1, wherein a position for extracting image data when the strip-shaped mirror is fully moved is determined.
JP2001001170A 2001-01-09 2001-01-09 Temperature distribution measuring apparatus Pending JP2002206968A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001001170A JP2002206968A (en) 2001-01-09 2001-01-09 Temperature distribution measuring apparatus
DE2002100540 DE10200540A1 (en) 2001-01-09 2002-01-09 Scanning adjustment mechanism for optical data disc drive, has assembly angle of screw inserted in scanner made adjustment relative to drive chassis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001001170A JP2002206968A (en) 2001-01-09 2001-01-09 Temperature distribution measuring apparatus

Publications (1)

Publication Number Publication Date
JP2002206968A true JP2002206968A (en) 2002-07-26

Family

ID=18869836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001001170A Pending JP2002206968A (en) 2001-01-09 2001-01-09 Temperature distribution measuring apparatus

Country Status (2)

Country Link
JP (1) JP2002206968A (en)
DE (1) DE10200540A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7211784B2 (en) 2004-03-16 2007-05-01 Kabushiki Kaisha Toshiba Photo-detection device and temperature distribution detection device using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7211784B2 (en) 2004-03-16 2007-05-01 Kabushiki Kaisha Toshiba Photo-detection device and temperature distribution detection device using the same

Also Published As

Publication number Publication date
DE10200540A1 (en) 2002-07-11

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