JPS5960355A - Ultrasonic flow detector - Google Patents
Ultrasonic flow detectorInfo
- Publication number
- JPS5960355A JPS5960355A JP57171869A JP17186982A JPS5960355A JP S5960355 A JPS5960355 A JP S5960355A JP 57171869 A JP57171869 A JP 57171869A JP 17186982 A JP17186982 A JP 17186982A JP S5960355 A JPS5960355 A JP S5960355A
- Authority
- JP
- Japan
- Prior art keywords
- image display
- plane image
- display device
- probe
- type probe
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0609—Display arrangements, e.g. colour displays
- G01N29/0618—Display arrangements, e.g. colour displays synchronised with scanning, e.g. in real-time
- G01N29/0627—Cathode-ray tube displays
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はアレイ形探触子を′用いた超音波探傷装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an ultrasonic flaw detection device using an array type probe.
〔発明の技術的１！以〕
超音波探１易装置には複数の振」・ｊｌ子を直線状に配
列したアレイ形探触子を用いたものがある。[Technical aspect of invention 1! Some ultrasonic detection devices use an array type probe in which a plurality of probes are arranged in a straight line.
そしてこのものはこのプレイ形探触子を電気的に走査し
、被検歪体内部の断面像を実時間で表示でさ、内部の欠
陥の有無、分布、形状を容易に判断することができるも
のである。This device electrically scans this play-type probe and displays a cross-sectional image of the inside of the strained object to be tested in real time, making it easy to determine the presence, distribution, and shape of internal defects. It is something.
上記プレイ形探融子を用いた超音波探傷装置はアレイ形
探触子位置に於げる一断面を表示しているにすきず、倒
斜全体を倹互する為には、アレイ形探触子を移動させつ
つ、次々に表示されるＨｅｒ面像を常に観察していなけ
ればならない。The ultrasonic flaw detection device using the above play-type melting probe only displays one cross section at the position of the array-type probe. While moving the child, the user must constantly observe the Her plane images that are displayed one after another.
従って材料全体に於ける内部欠陥の分布及び形状等に対
する検五渚の判断上困難にしている。This makes it difficult to judge the distribution and shape of internal defects in the entire material.
特に材料内部の欠陥等が有害であるか否かの判断を行な
う場合には欠陥の大きさはもとより、欠陥の分布及び形
状等のｔｔＶ ＊が不可欠であり、検査効率の面からも
、これらの情報が容易に得られる超−’Ｍ波探潟装置が
要求されている。In particular, when determining whether or not a defect inside a material is harmful, it is essential to check the ttV* of not only the size of the defect, but also the distribution and shape of the defect. There is a need for a super-'M-wave lagooning device from which information can be easily obtained.
本発甲」は以上の事１”ｉ’ｒにもとづいてなされたも
ので、その目的とするところはアレイ形探触子の位す、
における断面像だけでなく被検査体内部の平面像も表示
することができ、欠陥の評価を容易におこなうことがで
きる超音波深部装置を提供することにある。This document was developed based on the above 1.i'r, and its purpose is to position the array type probe.
An object of the present invention is to provide a deep ultrasound device that can display not only a cross-sectional image but also a planar image of the inside of an object to be inspected, and that can easily evaluate defects.
本発明は複数の振動子を直たよ状に配列したプレイ形探
触子と、このアレイ形探触子を上記振１１子の配列方向
と直父する方向に移動させる駆動機構と、上記アレイ形
探触子をその振動子の配列方向に電気的に走査させると
ともにこのアレイ形探触子がらの反射波信号を受ける超
音波探傷器と、上記駆動機構による上記アレイ形探触子
の移動位置を検出する位置検出器と、上記超音波探す器
からの信号を受は上記アレイ形探触子の振動子配列方向
に泪う被検査体の断面像を表示させる断面像表示回路と
、上記超音波探ｍ器および位置検出器からのｆｆｆ１号
を受は上記被検道・体内の平面像を表示させる平田酉）
、表示回路とを具備したものである。したがって、アレ
イ形探触子の位ｉ７＜７．における被検五体内Ｒｉｓの
断面像だけでなく、被検査体内部の平面像も表示される
ので、欠陥の分布、位置等が各−易に４４］定でき、欠
陥の評価を容易におこなうことができるものである。The present invention provides a play-type probe in which a plurality of transducers are arranged vertically, a drive mechanism for moving the array-type probe in a direction parallel to the arrangement direction of the 11 pendulums, and An ultrasonic flaw detector that electrically scans a probe in the array direction of its transducers and receives reflected wave signals from the array probe; and an ultrasonic flaw detector that controls the movement position of the array probe by the drive mechanism. A position detector for detecting the position, a cross-sectional image display circuit that receives signals from the ultrasonic wave detector and displays a cross-sectional image of the object to be inspected moving in the transducer arrangement direction of the array type probe; Receiving fff1 from the detector and the position detector displays the planar image of the examined canal and inside of the body)
, and a display circuit. Therefore, the position of the array type probe i7<7. Since not only a cross-sectional image of Ri within the body to be inspected but also a planar image of the interior of the body to be inspected is displayed, the distribution, position, etc. of defects can be easily determined and evaluation of defects can be easily performed. It is something that can be done.
実施例
以下木兄ツＪの一実施例を図を谷照して説明する。図中
１は油槽であって、内部には油が収容され、この油中に
被検査体２が収容されている。EXAMPLE Hereinafter, an example of the Kinentsu J will be explained with reference to the drawings. In the figure, reference numeral 1 denotes an oil tank, in which oil is stored, and an object to be inspected 2 is stored in this oil.
また、３はアレイ形探触子であって、複数の振ｈ＋子４
・・・を直線状に配列して構成されている。3 is an array type probe, which includes a plurality of pendulums 4
...is arranged in a straight line.
そして、このアレイ形操触子３＋ｉ駆！ｉｌｌ 機構５
によって振動子４・・の配列方向と面父する方向に移動
されるように構成されている。そして、この駆動機構５
には位置検出器６が設けられており、この位置検出器６
によってアレイ形探触子３の位置が恢出さ４するように
１１゛ｊ成されている。And this array-shaped manipulation probe 3+i drive! ill mechanism 5
It is configured to be moved in a direction that is in line with the arrangement direction of the vibrators 4. And this drive mechanism 5
is provided with a position detector 6, and this position detector 6
The position of the array type probe 3 is calculated 11゛j by 4.
また、７は超斤波探鴎器であって１、アレイ形探触子３
の振」；１１子４・・・を所定のタイミングで発振させ
、電気的に走査をおこなうとともにこれら振動子４・・
・で受信された反射波信号を受信するようにｆｆ４成さ
れている。また、Ｌは断面像表示回路である。そしてこ
の断面像表示回路りは信号処理料＊ｌ＋１器９、断面像
表示器１ｏ、ディスクリ回路ＩＩおよび第１ゲート回路
１２かも構成されている。また、１−３は平面像表示回
路であって、第２ゲート回路１４および平面像表示器１
５から構成されている。そして、前記超音波探傷器７は
受信された超音波信号を適度な信月レベルにまで増幅し
、検波整流された超音波受信号を出力すると共に、超音
波送受信の基準タイミング及び電子走査基準タイミング
と同期した電子走査位置信号を出力し、これらを信号処
理制御器９に送る。信号処理制御器９は電子走査同期信
号にもとづき電子走査位置信号と超音波ビーム路程信号
を発生し、ＣＲＴ等の断面像表示器ＩＱのｘＩＩＱＩＩ
、’ｊ ’ｌ’ｌ１１へ入゛カする。また超音波側Ｉ
：ｖ７より出力された超−高波受信上はディスクリ回路
１１へ入力され、外部より設定されたディスクリレベル
と比較し二値化信号に変換し、第１ゲート回路１２を通
して断面像表示器１０の２軸へ入力し、この画面像表示
′ＩＡ″”、；ｌｏ上に所定の電子走査位置及びビーム
路程位動、で評点を生じさせる１、また、第１ゲート回
路１２は信号処理制御器９より出力された第１ゲート制
御信号により、電子走査位置それぞれに於いて被検査体
２の表面反射波及び底１ｌｉｕ反躬波を含むビーム路程
区間内の２値化された超追波受イご号だけを断面像表示
器１０へ送るよう作動する。In addition, 7 is a supercontinuous wave probe, 1 is an array type probe 3
11 oscillators 4... are oscillated at a predetermined timing, electrical scanning is performed, and these oscillators 4...
ff4 is configured to receive the reflected wave signal received at . Further, L is a cross-sectional image display circuit. The cross-sectional image display circuit also includes a signal processing *l+1 unit 9, a cross-sectional image display 1o, a discret circuit II, and a first gate circuit 12. Further, 1-3 is a planar image display circuit, which includes a second gate circuit 14 and a planar image display 1.
It consists of 5. Then, the ultrasonic flaw detector 7 amplifies the received ultrasonic signal to a suitable signal level, outputs a detected and rectified ultrasonic reception signal, and also sets a reference timing for ultrasonic transmission and reception and an electronic scanning reference timing. It outputs electronic scanning position signals synchronized with and sends these to the signal processing controller 9. The signal processing controller 9 generates an electronic scanning position signal and an ultrasonic beam path signal based on an electronic scanning synchronization signal, and generates xIIQII of a cross-sectional image display IQ such as a CRT.
, 'j 'l'l11. Also, the ultrasonic side I
: The ultra-high wave received output from v7 is input to the discretization circuit 11, which compares it with the discretization level set from the outside and converts it into a binary signal, and then passes it through the first gate circuit 12 to the cross-sectional image display 10. The first gate circuit 12 is a signal processing controller. 9, the binarized super-following wave reception signal in the beam path section including the surface reflected wave and bottom 1 liu reflected wave of the object to be inspected 2 is generated at each electronic scanning position. It operates to send only the number to the cross-sectional image display 10.
なお、この時のゲート位置の設定は外部より調Ｖ ｒｖ
ｔｉ’Ｅ５である。そして、これにより、被検査体２の
断面像が断面像表示器ｌｏ上に実時間で表示される。ま
た、第１ゲート回路１２を通過して断面像表示器１ｏへ
出力された超音波受信号は、さらに第２ゲート回Ｅ？？
ＪＩ４へも分岐して入力するように梠′成されており、
第２ゲート回路１４は、被検前体２０表面反射波及び底
面反射波が含まれないビーム路程区間内の超音波受信号
をＣＲＴ等の平面像表示器１５へ出力し、この場合にこ
の第２ゲート回路１４は信号処理制御器９の第２グー）
１１ｉｌＪ御信号により制御される。Note that the gate position setting at this time is controlled externally by adjusting V rv
It is ti'E5. Thereby, a cross-sectional image of the object to be inspected 2 is displayed on the cross-sectional image display lo in real time. Further, the ultrasonic reception signal that has passed through the first gate circuit 12 and is output to the cross-sectional image display device 1o is further transmitted to the second gate circuit E? ?
It is structured so that it also branches to JI4 and inputs,
The second gate circuit 14 outputs the ultrasonic reception signal within the beam path section that does not include the surface reflected wave and the bottom surface reflected wave of the subject subject 20 to the plane image display 15 such as a CRT. 2 gate circuit 14 is the second gate circuit of the signal processing controller 9)
It is controlled by the 11ilJ control signal.
また第２ゲート回路Ｉ４より被検査体２からの表面波と
底面波から分離した欠陥からの２値化された超音波受信
号は平面像表示器１５の２軸へ入力され、この平面像表
示器１５のＢ［定位置でか１１点を発生させる。この平
面像表示器１５のＸ軸にはｎ、、子走査位置へ号が信号
処理制御器９より入力されている。また、駆ｍ）＋ Ｃ
Ｍ横５と連動する探触子の位置検出器６によりアレイ形
探触子３の移動加に応じた、俵械走査位籠信号が平面像
表示器１５のＹ ’４’４１ｉへ入力される。そこで、
これによって被検査体２の内部欠陥に対応した平面像が
平面像表示器Ｉ５へ画像表示される。Further, the binarized ultrasonic reception signal from the defect separated from the surface wave and bottom wave from the object to be inspected 2 is input from the second gate circuit I4 to the two axes of the plane image display 15, and the plane image is displayed. B of device 15 [generates 11 points at the fixed position. On the X-axis of the plane image display 15, the signal n, indicating the child scanning position, is inputted from the signal processing controller 9. Also, dm) + C
A bar machine scanning position signal corresponding to the movement of the array type probe 3 is inputted to Y'4'41i of the plane image display 15 by the probe position detector 6 which is linked with the M side 5. . Therefore,
As a result, a planar image corresponding to the internal defect of the object to be inspected 2 is displayed on the planar image display I5.
なお、平面像表示器１５を通常用いられるＣＲＴを使用
すると、アレイ形探触子２の似械走丘速ＩＷが遅いのと
繰返し走ｉを行なわないため静止画像として表示するこ
とは田畑、であるため、本実施例に於いては、ストレー
ジ型ｃｌもＴを使用し、表示画１頭の記１、はとＶｊ’
（’正画像表示がおこなえるように構成されている。ま
た、残光型Ｃｕｔ、ＴあるいＯ」１、画り′釈メモリと
通常ｃ ｉｔ ’Ｉ’の組み合せにより画像メモリ内デ
ーターを高速で表示させる構成によっても同様の効果が
得られる。Note that if a CRT, which is commonly used, is used as the plane image display device 15, it is difficult to display a static image because the imitative running speed IW of the array type probe 2 is slow and the repeated running is not performed. Therefore, in this embodiment, the storage type cl also uses T, and the display image 1, pigeon Vj'
(It is configured so that it can display the normal image. Also, by combining the afterglow type Cut, T or O'1, the image interpretation memory and the normal C it 'I', the data in the image memory can be displayed at high speed. Similar effects can be obtained depending on the display configuration.
つぎに、前記超音波受信号７より出力された超音波受信
号はディスクリ回路１１の入力のほかにピークホールド
回路１６へも入力され、信号処理ｉ１ｉ！Ｉ仰器９より
出力された第２ゲート制御信号によりピークボールド回
路１６は第２ゲート区間内の■３がＬ検波された超音波
受信号の最大値を検出し、かつ保持する。そして、ピー
クホールドされた超音波受（ｆｉ号はアナログテジタル
変換器１７によりデジタル化され、メモリ回路１８へ記
憶させる。このメモＩ） ７ ｇには前ｉｊ＋２ 信号
処理制御器９がらの電子走査位置信号及び位置検出器６
がらの機徐走査位鉦信号がアドレス信号として入力され
、を子走亘位置及び機椋走査位勧、にＹｌ、じて、Ｉｌ
ｌ員次第２ゲート区間内における超潜阪受（ｒｊ４じの
Ｊ゛１８１８大値、（ユされるように構１戊されている
。また、このメモリ回路１８は電子ｈ１↓′一様１９と
も接続され、１ｈ子ｉｊ所−後〕９からのアクセスを可
能としており、メモリ回路１８内の超追波受イａデータ
ーを電子走査位置及び機械走１ｆ、位置と対応するアド
レスと共に電子剖算（幾１８に送り、この電子削算俵１
９により各種の信号処理をｏＪ能とし、かつ、を子１１
ν機１９に接続された、プリンター、ブロック−１ＣＩ
ｔ Ｔ、補助ｈＣ憶装置等の表示記録器２０で信号処理
結果を表示あるいはｈＣ録、収集をおこなえるように構
成されている。Next, the ultrasonic reception signal outputted from the ultrasonic reception signal 7 is input to the peak hold circuit 16 in addition to the input of the discretization circuit 11, and the signal processing i1i! The peak-bold circuit 16 detects and holds the maximum value of the ultrasonic reception signal L-detected in the second gate section by the second gate control signal outputted from the I-elevator 9. Then, the peak-held ultrasonic receiver (fi number is digitized by the analog-to-digital converter 17 and stored in the memory circuit 18. This memo I) 7 g indicates the electronic scanning position of the front ij+2 signal processing controller 9. Signal and position detector 6
The automatic scanning position signal is input as an address signal, and the automatic scanning position and automatic scanning position are determined by Yl, so that Il
The memory circuit 18 is configured so that the super-submerged slope receiver (rj 4th J゛1818 large value, It is connected to enable access from the 1h child's place - 9], and the super tracking wave receiving data in the memory circuit 18 is stored in the electronic scanning position and the mechanical scanning 1f, together with the address corresponding to the position and the electronic autopsy ( Send this electronic reduction bale 1 to Iku 18
9 performs various signal processing functions, and the child 11
Printer, block-1CI, connected to ν machine 19
It is configured so that signal processing results can be displayed or recorded and collected on a display/recorder 20 such as an auxiliary hC storage device.
なｆＧ ％本実施例では油浸垂直深場での実施例につい
て説明したが、本発明は′電子走査法による超音波探１
易にも適用できる。fG % In this example, an example was explained in an oil immersion vertical deep field, but the present invention
It can be easily applied.
また、アレイ型探触子の超音波受信号使用する振動子は
同−振１ｊｈ子を用いる一探触子法、あるいは送受信で
具なる振ルノｌ子を選択し用いる２分割法、さらに送受
信で異なる探触子を用いる二探触子法いずれの場合にで
も遍応し得るものである。In addition, the transducer used for the ultrasonic reception signal of the array type probe can be the one-probe method using a 1JH element, the 2-split method using a 1JH element for transmitting and receiving, or the 2-split method using a 1JH element for transmitting and receiving. This method is universally applicable to any two-probe method using different probes.
また、本実施１クリにおいて、ｒ４）＋面像表示を行な
う＃、ｌ−ｒ ＵｔＪ像表小器は通常のＣＩｔ ’１’
を用いているが、これをストレージ型ＣＲＴを用いるこ
とにより、電子走置によるＩＱｉ面像を儀椋走畳位置に
ｊ、し、して蓄打〔シ機械走丘方向の投影像がＮられろ
。In addition, in this embodiment 1, the #, l-r UtJ image display device that performs r4) + surface image display is the normal CIt '1'
However, by using a storage-type CRT, the IQi plane image by electronic scanning is placed at the horizontal position, and the projected image in the mechanical horizontal direction is reactor.
さらに本実施例での＋１４成によれば、↑ＩＬ子Ｓｔ
’ｃ−ｉ−器に、＆’陥結呆にもとづく被検査体５の良
否判定ｆ幾能を伺加し、さらにその判尾糺゛４１↓によ
って作動する良品不良品選別機と、被検査体供給機構を
糺み合せ、良否判定を自動的におこなうこともできる。Furthermore, according to the +14 formation in this example, ↑IL child St
A function for determining the quality of the inspected object 5 based on &' concavity is added to the c-i-device, and a good/defective sorting machine that operates based on the test result 41↓ and a inspected object It is also possible to automatically determine pass/fail by connecting the body supply mechanism.
上述の々１」＜本発つ」は複数の振動子を直線状に配列
したアレイ形探触子と、このアレイ形探触子を上記振動
子の配列方向と直交する方向に移動させる駆動機構と、
上記アレイ形探触子をその振動子の配列方向に電気的に
走査させるとともにこのアレイ形探触子がらの反剃波仏
号を受ける超音波探傷器と、上記駆動機構による上記ア
レイ形探触子の移動位置を検出する位置検出器と、上記
超音波探傷器からの信号を受は上記アレイ形捺触子の振
動子配列方向にＧ５被検査体の断面像を表示させる断面
像表示回路と、上記超音波探傷器および位置検出器から
の信号を受は上記被検査体内の平面像を表示させる平面
像表示回路とを具備したものである。したがって、アレ
イ形探触子の位置における被検査体内部の断面像だけで
なく、被検畳体内部の平面１象も表示されるので、欠陥
の分布、位置等が容易に判定でき、欠陥の評価を容易に
おこなうことができる等その効果は大である。Item 1 above refers to an array-type probe in which a plurality of transducers are arranged in a linear manner, and a drive mechanism that moves this array-type probe in a direction perpendicular to the arrangement direction of the transducers. ,
An ultrasonic flaw detector that electrically scans the array-type probe in the direction in which its transducers are arranged and receives anti-shaving waves from the array-type probe, and the array-type probe using the drive mechanism. a position detector for detecting the moving position of the child; and a cross-sectional image display circuit that receives signals from the ultrasonic flaw detector and displays a cross-sectional image of the G5 object in the transducer arrangement direction of the array type contactor. , a planar image display circuit that receives signals from the ultrasonic flaw detector and the position detector and displays a planar image of the inside of the object to be inspected. Therefore, not only a cross-sectional image of the interior of the object to be inspected at the position of the array probe, but also a single plane image of the interior of the object to be inspected is displayed, making it easy to determine the distribution and location of defects. The effects are great, such as the ease of evaluation.
図は本発明の一実施例の概略構成図である。
２・・・被検査体、３・・・アレイ形探触子、５・・・
駆動機構、６・・・位置検出器、７・・・超音波探傷器
、！・・・断面像表示回路、ＩＱ・・・断面像表示器、
１−３・・・平面像表示回路、１５・・・平面像表示器
。The figure is a schematic configuration diagram of an embodiment of the present invention. 2... Test object, 3... Array type probe, 5...
Drive mechanism, 6... position detector, 7... ultrasonic flaw detector,! ... Cross-sectional image display circuit, IQ ... Cross-sectional image display device,
1-3... Planar image display circuit, 15... Planar image display.
Claims (1)
のアレイ形探触子を上記振動子の配列方向と直交する方
向に移動させる駆動機構と、上舵アレイ形探触子をその
秦動子の配列方向に電気的に走立させるとともにこのア
レイ形探触子からの反射波（Ａ号を受ける超音波探９Ａ
器と、上記駆動機構による上記アレイ形探触子の移動位
置を検出する位置検出器と、上記超音波探嶋器からの信
号を受は上記アレイ形探触子の振動子配列方向に泪５被
検査体の断面像を表示させる断面像表示回路と、上記超
音波探陥器および位置検出器からの信号を受は上記被検
査体内の平面像を表示させる平面像表示回路とを具備し
たことを特徴とする超音波探傷装置。An array type probe in which a plurality of transducers are arranged in a straight line, a drive mechanism that moves the array type probe in a direction perpendicular to the arrangement direction of the transducers, and an upper rudder array type probe in its direction. The ultrasonic probe 9A receives reflected waves from this array type probe (No.
a position detector for detecting the position of movement of the array type probe by the drive mechanism; A cross-sectional image display circuit that displays a cross-sectional image of the object to be inspected, and a planar image display circuit that receives signals from the ultrasonic probe and the position detector and displays a planar image of the inside of the object to be inspected. An ultrasonic flaw detection device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57171869A JPS5960355A (en) | 1982-09-30 | 1982-09-30 | Ultrasonic flow detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57171869A JPS5960355A (en) | 1982-09-30 | 1982-09-30 | Ultrasonic flow detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5960355A true JPS5960355A (en) | 1984-04-06 |
Family
ID=15931293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57171869A Pending JPS5960355A (en) | 1982-09-30 | 1982-09-30 | Ultrasonic flow detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5960355A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01318952A (en) * | 1988-06-20 | 1989-12-25 | Mitsubishi Electric Corp | Method for recognizing shape of three-dimensional body using ultrasonic wave |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4954088A (en) * | 1972-07-24 | 1974-05-25 | ||
| JPS5190187A (en) * | 1975-02-04 | 1976-08-07 | ||
| JPS5337489A (en) * | 1976-09-17 | 1978-04-06 | Hitachi Ltd | Inspecting apparatus by ultrasonic wave |
-
1982
- 1982-09-30 JP JP57171869A patent/JPS5960355A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4954088A (en) * | 1972-07-24 | 1974-05-25 | ||
| JPS5190187A (en) * | 1975-02-04 | 1976-08-07 | ||
| JPS5337489A (en) * | 1976-09-17 | 1978-04-06 | Hitachi Ltd | Inspecting apparatus by ultrasonic wave |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01318952A (en) * | 1988-06-20 | 1989-12-25 | Mitsubishi Electric Corp | Method for recognizing shape of three-dimensional body using ultrasonic wave |
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