JPH0219735Y2 - - Google Patents
Info
- Publication number
- JPH0219735Y2 JPH0219735Y2 JP1982170434U JP17043482U JPH0219735Y2 JP H0219735 Y2 JPH0219735 Y2 JP H0219735Y2 JP 1982170434 U JP1982170434 U JP 1982170434U JP 17043482 U JP17043482 U JP 17043482U JP H0219735 Y2 JPH0219735 Y2 JP H0219735Y2
- Authority
- JP
- Japan
- Prior art keywords
- probe
- straight line
- flaw detection
- transmitting
- receiving
- 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.)
- Expired
Links
- 239000000523 sample Substances 0.000 claims description 58
- 238000001514 detection method Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 8
- 230000002950 deficient Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
本考案は、超音波探傷を行なうタンデム探傷装
置に関する。[Detailed Description of the Invention] The present invention relates to a tandem flaw detection device that performs ultrasonic flaw detection.
金属等の見えない部分に組織の異常や欠陥がな
いかどうかを調べる場合には、該金属内に超音波
を伝播させ、伝播する超音波の振動エネルギーの
減少や反射状態等から欠陥部を検出する超音波探
傷が行なわれる。 When investigating whether there are structural abnormalities or defects in invisible parts of metal, etc., ultrasonic waves are propagated within the metal, and defects are detected from the reduction in the vibration energy of the propagating ultrasonic waves and the state of reflection. Ultrasonic flaw detection is performed.
超音波探傷のひとつにタンデム探傷がある。タ
ンデム探傷は一方の探触子から超音波を送信し、
他方の探触子でこの超音波を受信するようにした
ものである。 Tandem flaw detection is one type of ultrasonic flaw detection. Tandem flaw detection transmits ultrasonic waves from one probe,
This ultrasonic wave is received by the other probe.
従来、タンデム探傷は次のようにして行なわれ
る。 Conventionally, tandem flaw detection is performed as follows.
即ち、第１図のように送信用探触子１と受信用
探触子２を同一直線上にｌだけ離して配置し、一
般的にこれらの送信用探触子１と受信用探触子２
の屈折角は同一でθとされる。送信用探触子１か
ら超音波が送信され、もし欠陥部３があると超音
波はこの欠陥部３で反射され、更に底面４で反射
されて受信用探触子２で受信する。第１図は板厚
方向の略中間の欠陥部３を探傷する場合である
が、板厚方向の上面５の近傍あるいは底面４の近
傍の欠陥部３を探傷する場合は、前記直線上で探
触子１又は２を動かし夫々第２図のようにｌの値
を大きくしたり第３図のようにｌの値を小さくし
た状態で送信用探触子１及び受信用探触子２を同
時に移動させればよい。なお、６は被検体であ
る。 That is, as shown in FIG. 1, a transmitting probe 1 and a receiving probe 2 are arranged on the same straight line with a distance l apart, and generally these transmitting probe 1 and receiving probe 2
The refraction angles of are the same and are assumed to be θ. Ultrasonic waves are transmitted from the transmitting probe 1, and if there is a defective part 3, the ultrasonic waves are reflected by the defective part 3, further reflected by the bottom surface 4, and received by the receiving probe 2. Fig. 1 shows a case where a defect 3 located approximately in the middle of the plate in the thickness direction is detected, but when detecting a defect 3 near the top surface 5 or bottom surface 4 in the thickness direction, the detection is performed on the straight line. By moving probe 1 or 2 and increasing the value of l as shown in Figure 2 or decreasing the value of l as shown in Figure 3, transmitting probe 1 and receiving probe 2 are simultaneously connected. Just move it. Note that 6 is the subject.
ところが、以上のことから推定できるように底
面のすぐ近くの欠陥部を探傷するには一直線上の
略同一の点に送信用探触子と受信用探触子とを配
置しなければならないこととなり、タンデム探傷
が事実上困難である。 However, as can be deduced from the above, in order to detect defects in the immediate vicinity of the bottom surface, the transmitting probe and the receiving probe must be placed at approximately the same point on a straight line. , tandem flaw detection is practically difficult.
底面のすぐ近くの欠陥部を探傷するには他の探
傷法を用いればよいが、特殊な場合としてこのよ
うな欠陥部の探傷にもタンデム探傷が必要とされ
ることがある。 Although other flaw detection methods can be used to detect flaws in the immediate vicinity of the bottom surface, tandem flaw detection may be required in special cases to detect flaws in such flaws.
そこで本考案は、底面のすぐ近くの欠陥部の探
傷にもタンデム探傷することができるタンデム探
傷装置を提供することを目的とする。 Therefore, an object of the present invention is to provide a tandem flaw detection device that can perform tandem flaw detection even for flaw detection in the immediate vicinity of the bottom surface.
斯かる目的を達成する本考案の構成は、被検査
体表面を一の直線に沿つて移動される送信用探触
子と、前記直線と平行な他の直線に沿つて移動さ
れる受信用探触子とを有する超音波探傷装置にお
いて、前記送信用探触子の超音波送信角を前記他
の直線側に傾斜させる一方前記受信用探触子の超
音波受信角を前記一の直線側に傾斜させてなるこ
とを特徴とする。 The configuration of the present invention that achieves this purpose includes a transmitting probe that is moved along one straight line on the surface of the object to be inspected, and a receiving probe that is moved along another straight line that is parallel to the said straight line. In an ultrasonic flaw detection device having a probe, the ultrasonic transmission angle of the transmitting probe is tilted toward the other straight line, while the ultrasonic reception angle of the receiving probe is tilted toward the first straight line. It is characterized by being inclined.
以下、本考案を図面に示す実施例に基づいて詳
細に説明する。 Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
本考案は、従来のようにひとつの直線上で移動
させるのとは異なり相互に平行な二直線上で夫々
送信用の探触子と受信用の探触子を移動させるこ
とにより、底面のすぐ近くの欠陥部の探傷をも可
能にしたものである。 Unlike conventional methods in which the probes are moved along a single straight line, the present invention moves the transmitting probe and the receiving probe on two mutually parallel straight lines. This also makes it possible to detect nearby defects.
本考案の平面図、一部断面で示す正面図、一部
断面で示す右側面図を夫々第４図、第５図、第６
図に示す。第４図において上、下、左、右を夫々
右側、左側、前方、後方と予め決めて説明する。
左フレーム１１と右フレーム１２とを前フレーム
１３と後フレーム１４とで挾み、更にこの上に上
フレーム１５を取り付けることによつて本体が形
成される。上フレーム１５には相互に平行なガイ
ド孔１６及び１７が前後方向に設けられ、このガ
イド孔１６及び１７に沿つて摺動自在に上部保持
具１８及び１９が具えられる。上部保持具１８及
び１９にはバネ２０を介して上下方向へ摺動自在
に下部保持具２１及び２２が嵌め込まれ、更に下
部保持具２２及び２１には送信用探触子２３及び
受信用探触子２４が固定される。そして、前フレ
ーム１３と後フレーム１４の上部には上部保持具
１９に螺合されたネジ棒２５が回動自在に支持さ
れ、該ねじ棒２５の前部にはストレートクランク
２６が取り付けられる。このストレートクランク
２６を右あるいは左へ回すことにより上部保持具
１９は前後方向へ移動することができるので、ネ
ジ軸２５の回転数及び回転角の関係から送信用探
触子２３の位置を知ることができるよう前フレー
ム１３に全円分度器２７が貼着されるとともにネ
ジ軸２５に針２８が固定される。一方、上部保持
具１８はボルト２９で上フレーム１５に固定され
る。以上の構成において、送信用探触子２３と受
信用探触子２４は相互に略平行な直線３０及び３
１上に具えられ送信用探触子２３のみが直線３０
に沿つて移動可能とされる一方、受信用探触子２
４は上フレーム１５に固定されている。このよう
に送信用探触子２３と受信用探触子２４とを相互
に平行な直線３０，３１上で移動可能に配置した
状態でも底面３２で反射した超音波が受信用探触
子２４で受信できるよう直線３０あるいは３１ま
わりに送信用探触子２３の送信角α及び受信用探
触子２４の受信角βを変えることができる。送信
角α及び受信角βは一般に同じ値であり被検体３
３の板厚ｔによつて変えなければならないので、
その変更は図示しない調整ねじにより行なうこと
ができる。このほか送信用探触子２３及び受信用
探触子２４の屈折角θ1及びθ2も屈折角が変えられ
る可変探触子を使用するか、屈折角の異なる各種
探触子を交換して使用することにより従来と同様
に屈折角θ1及びθ2を変えることができる。 A plan view, a partially sectional front view, and a partially sectional right side view of the present invention are shown in FIGS. 4, 5, and 6, respectively.
As shown in the figure. In FIG. 4, upper, lower, left, and right are predetermined as right side, left side, front, and rear, respectively.
The main body is formed by sandwiching the left frame 11 and the right frame 12 between the front frame 13 and the rear frame 14, and further attaching the upper frame 15 thereon. The upper frame 15 is provided with mutually parallel guide holes 16 and 17 in the front-rear direction, and upper holders 18 and 19 are provided to be slidable along the guide holes 16 and 17. Lower holders 21 and 22 are fitted into the upper holders 18 and 19 so as to be able to slide vertically via springs 20, and a transmitting probe 23 and a receiving probe are fitted into the lower holders 22 and 21. Child 24 is fixed. A threaded rod 25 screwed into an upper holder 19 is rotatably supported at the upper part of the front frame 13 and the rear frame 14, and a straight crank 26 is attached to the front part of the threaded rod 25. By turning this straight crank 26 to the right or left, the upper holder 19 can be moved in the front-back direction, so the position of the transmitting probe 23 can be determined from the relationship between the rotation speed and rotation angle of the screw shaft 25. A full circle protractor 27 is attached to the front frame 13 so that the needle 28 is fixed to the screw shaft 25. On the other hand, the upper holder 18 is fixed to the upper frame 15 with bolts 29. In the above configuration, the transmitting probe 23 and the receiving probe 24 are connected to straight lines 30 and 3 which are substantially parallel to each other.
1 and only the transmitting probe 23 is in a straight line 30
While the receiving probe 2 is movable along the
4 is fixed to the upper frame 15. Even when the transmitting probe 23 and the receiving probe 24 are arranged so as to be movable on the straight lines 30 and 31 parallel to each other, the ultrasonic waves reflected from the bottom surface 32 are transmitted to the receiving probe 24. The transmitting angle α of the transmitting probe 23 and the receiving angle β of the receiving probe 24 can be changed around the straight line 30 or 31 to enable reception. The transmitting angle α and the receiving angle β are generally the same value, and
Since it has to be changed depending on the plate thickness t of 3,
The change can be made using an adjustment screw (not shown). In addition, the refraction angles θ 1 and θ 2 of the transmitting probe 23 and the receiving probe 24 can be changed by using a variable probe whose refraction angle can be changed, or by replacing various probes with different refraction angles. By using this, the refraction angles θ 1 and θ 2 can be changed as in the conventional case.
斯かる装置の作用を説明する。本体を被検体３
３上に載せると、バネ２０のはたらきにより送信
用探触子２３及び受信用探触子２４は被検体３３
に押圧される。被検体３３の板厚方向における上
面近傍、底面近傍、中間部は前述した第１図〜第
３図と同様に探傷でき、底面のすぐ近くの探傷は
第７図〜第９図のようにして行なうことができ
る。即ち、送信用探触子２３及び受信用探触子２
４の屈折角をたとえばθ1＝θ2＝一定とし、送信用
探触子２３と受信用探触子２４を共に直線３０あ
るいは３１と直角な線上にほぼ並列に並べた状態
にする。そして送信用探触子２３からの超音波が
底面３２で反射されれば受信用探触子２４で受信
できるように、送信角αと受信角βを決める。こ
のように角度を設定した後は本体を被検体３３上
で摺動させる。底面３２のすぐ近くに欠陥部がな
い場合には受信用探触子２４が超音波を受信する
ことはない（超音波は前方の底面３２で反射し更
に前方へ進むため）が、図のように欠陥部３４が
ある場合にはこの欠陥部３４で超音波が反射さ
れ、更に底面３２で反射されるため受信用探触子
２４で超音波を受信することになる。なお、屈折
角θ1，θ2は特に限定されるものではなく、探傷条
件に応じて任意に決められる。また、超音波は実
際には図示するような線ではなくある程度の広が
りをもつていてこの広がりの範囲内でタンデム探
傷を行なう。 The operation of such a device will now be explained. Place the main body under test 3
3, the transmitting probe 23 and the receiving probe 24 are placed on the subject 33 by the action of the spring 20.
Pressed by The vicinity of the top surface, the vicinity of the bottom surface, and the middle part in the thickness direction of the test object 33 can be detected in the same manner as shown in FIGS. can be done. That is, the transmitting probe 23 and the receiving probe 2
For example, the refraction angle of 4 is set to θ 1 =θ 2 = constant, and both the transmitting probe 23 and the receiving probe 24 are arranged substantially parallel to each other on a line perpendicular to the straight line 30 or 31. Then, the transmitting angle α and the receiving angle β are determined so that if the ultrasonic wave from the transmitting probe 23 is reflected by the bottom surface 32, it can be received by the receiving probe 24. After setting the angle in this way, the main body is slid on the subject 33. If there is no defect in the immediate vicinity of the bottom surface 32, the reception probe 24 will not receive the ultrasonic waves (because the ultrasonic waves are reflected by the bottom surface 32 in front and proceed further forward), but as shown in the figure. If there is a defective part 34 on the surface of the receiver, the ultrasonic wave is reflected by the defective part 34 and further reflected by the bottom surface 32, so that the receiving probe 24 receives the ultrasonic wave. Note that the refraction angles θ 1 and θ 2 are not particularly limited, and can be arbitrarily determined according to the flaw detection conditions. Furthermore, the ultrasonic wave actually has a certain extent of spread, rather than a line as shown in the figure, and tandem flaw detection is performed within this range of spread.
前記実施例においては送信用探触子のみを移動
可能としたが、これに限るものではなく逆に受信
用探触子のみあるいは双方の探触子を共に移動可
能としてもよい。 Although in the embodiment described above, only the transmitting probe is movable, the present invention is not limited to this, and conversely, only the receiving probe or both probes may be movable.
以上、実施例を図面とともに説明したように、
本考案によれば送信用の探触子あるいは受信用の
探触子を夫々平行線上で少なくともいずれか一方
を移動可能に配置しているので底面のすぐ近くの
欠陥部のタンデム探傷が可能である。 As described above with the drawings,
According to the present invention, since at least one of the transmitting probe and the receiving probe is arranged movably on parallel lines, it is possible to perform tandem flaw detection of defects in the immediate vicinity of the bottom surface. .
第１図、第２図、第３図は従来のタンデム探傷
の説明図、第４図〜第９図は本考案によるタンデ
ム探傷装置の実施例に係り、第４図は平面図、第
５図は一部断面で示す正面図、第６図は一部断面
で示す右側面図、第７図、第８図、第９図は作用
を説明するための夫々正面図、平面図、右側面図
である。
図面中、２３は送信用探触子、２４は受信用探
触子、３０，３１は直線、αは送信角、βは受信
角である。
Figures 1, 2, and 3 are explanatory diagrams of conventional tandem flaw detection, Figures 4 to 9 relate to embodiments of the tandem flaw detection apparatus according to the present invention, Figure 4 is a plan view, and Figure 5 6 is a partially sectional front view, FIG. 6 is a partially sectional right side view, and FIGS. 7, 8, and 9 are a front view, a top view, and a right side view, respectively, for explaining the operation. It is. In the drawing, 23 is a transmitting probe, 24 is a receiving probe, 30 and 31 are straight lines, α is a transmitting angle, and β is a receiving angle.
Claims (1)
信用探触子と、前記直線と平行な他の直線に沿つ
て移動される受信用探触子とを有する超音波探傷
装置において、前記送信用探触子の超音波送信角
を前記他の直線側に傾斜させる一方前記受信用探
触子の超音波受信角を前記一の直線側に傾斜させ
てなることを特徴とするタンデム探傷装置。 In an ultrasonic flaw detection apparatus having a transmitting probe that is moved along one straight line on the surface of the object to be inspected and a receiving probe that is moved along another straight line that is parallel to the said straight line, A tandem flaw detection device characterized in that the ultrasonic transmission angle of the transmitting probe is tilted toward the other straight line side, while the ultrasonic reception angle of the receiving probe is tilted toward the first straight line side. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17043482U JPS5974359U (en) | 1982-11-12 | 1982-11-12 | Tandem flaw detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17043482U JPS5974359U (en) | 1982-11-12 | 1982-11-12 | Tandem flaw detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5974359U JPS5974359U (en) | 1984-05-19 |
| JPH0219735Y2 true JPH0219735Y2 (en) | 1990-05-30 |
Family
ID=30372071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17043482U Granted JPS5974359U (en) | 1982-11-12 | 1982-11-12 | Tandem flaw detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5974359U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5084077U (en) * | 1973-12-03 | 1975-07-18 |
-
1982
- 1982-11-12 JP JP17043482U patent/JPS5974359U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5974359U (en) | 1984-05-19 |
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