JPS58108453A - Holding means for array type probe - Google Patents

Abstract

PURPOSE:To improve a flaw finding efficiency (ultrasonic transmitting and receiving efficiency), by a method wherein a shoe, whose end surfaces are processed so as to match sound-transmitting and receiving surfaces of an objected to be probed and a probe, located between the probe and the object to be probed. CONSTITUTION:A shoe 3 is pressed against an object 1 to be probed by a constant pressure by means of a spring or an air cylinder 11 attached to a support rod 10 secured to a fixed support frame 9. A contact medium 13 is fed at any time to a surface, where a probe 2 contacts the shoe 3, through a feed pipe 14 to improve an efficiency of sound transmission between the two parts and also to smooth the movement of the probe 2. The contact medium 13 is supplied at any time also to a surface where the shoe 3 contacts the object 1 to be probed through a feed pipe 15, where necessary. A non-metallic material, a metallic material, or an acryl series resin material are used as the material of the shoe 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an array m used in electronic scanning ultrasonic flaw detection.
In a probe, it particularly relates to a holding part for contacting the object to be inspected.

Technical Background of the Invention In recent years, in electronic scanning ultrasonic flaw detection, the contact efficiency between the object to be tested and the ultrasonic probe has become an important issue9.
．． In response to this, many attempts have been made, including methods for holding the probe and for supplying a couplant interposed between the probe and the object to be tested. In the case of array-type probes, a recent example of using a wire between the probe and the object to be detected is disclosed in "Unexamined Japanese Patent Publication No. 54-1.
43194'' and 1997-164182, etc.), but there is no description of maintaining the contact efficiency during the movement of the probe.

Problems with the Background Art By the way, in such conventional means, in order to improve the contact efficiency between the probe and the object to be tested, it is necessary to contact the transmitting/receiving surface of the contact with a 7U that matches the shape of the object to be tested. Methods such as constantly automatically supplying the probe to the probe's transmitting/receiving surface or the catalyst material have been adopted; There are drawbacks such as failure to maintain sufficient contact efficiency due to interruptions in the supply of catalyst. On the other hand, array type probes generally require a large ultrasonic transmission/reception aperture to focus the ultrasonic beam into the object to be inspected and to obtain a large field of view through linear electronic scanning. In such cases, the size of the probe is necessarily large], making it difficult to make uniform contact with the object to be inspected. Furthermore, arranging the transducer groups of play-type probes in a curved shape is complicated to manufacture.
Play-type probes consisting of a group of vibrations arranged in a straight line are usually used for flaw detection, but as the probe size increases, uniform contact of the probe with the curved object to be inspected becomes difficult. It becomes difficult.

Purpose of the Invention The present invention was made in view of the above-mentioned circumstances, and its purpose is to maintain sufficient contact efficiency between the probe and the object to be tested to improve flaw detection efficiency (ultrasonic transmission/reception efficiency). To provide a play-type probe holding system that can improve the performance of the probe.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention uses an array probe, which is formed by arranging a plurality of transducers used in electronic scanning ultrasonic flaw detection, and one end surface of the probe in the relationship between the probe and the object to be inspected. A play-type probe in which the other end surface is machined to match the shape of the transmitting/receiving front surface of the probe, and the probe is moved on the shoe surface. It constitutes the child retention odor.

Embodiment of the Invention An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1(a) and 1(b) show an example of the structure of an array probe holder according to the present invention, and the figures show an example applied to the outer surface of a circular object 1 to be tested. Figure 1 (a) (b)
The play-type probe 2 is movable along the guide rod 4 on the top surface of the cylindrical body 3, which has been finished sufficiently smooth. This guide rod 4 is fixedly attached to a supporting plate 5 which is fixedly attached to the guide rod 4, and is attached so that the guide rod 4Vc#''i sleeve 6 is movable.Furthermore,
A case i is fixedly attached to the three 16 so that the play type probe 2 is not angularly misaligned with the longitudinal direction of the guide rod 4. Furthermore, a spring 8 is incorporated inside the case 1, and its elastic force always presses the play-type probe 2 against the surface of the probe 71-3 with a constant pressure. Here, -1 is generally selected from a material that can efficiently achieve acoustic matching between the play type probe 2 and the object to be tested 1. For example, non-metallic materials, metallic materials, acrylic resin materials, etc. are used. .

On the other hand, the support bar 1 fixed to the fixed support frame 9 which does not cause any displacement relative to the object to be tested 1 or the object to be tested 1 is installed. The object to be flawed is uniformly touched through the holding plate 12 from the spring or air liner-JJK.

In addition, play type probes 2 and 7. -J (at contact surface, couplant IJ is supplied from supply pipe f14 at any time.
% The acoustic transmission efficiency between the two is improved, and the movement of the play type probe 2 is made smooth. It was,
A couplant 18 is also supplied to the contact surface between the flaw detection object 1 and the flaw detecting object 1 through a supply pipe 25 as needed.

Figures 2 (a) and (b) show the contact surface and cross section of the test object of -S, and as shown in Figures 2 (a), (b) and vc, the test object of -3 A plurality of supply holes J6 are provided on the surface that comes in contact with the body, and a plurality of supply holes J6 are provided uniformly from the conduit 17 provided inside the body to each supply hole 16! I catalyst IJ
supply.

In such a configuration, -S can be freely moved and installed in order to detect a desired area of the object to be tested 1.7. - When the J-J moves to a predetermined position, the couplant 13 is sufficiently supplied from the supply hole 1# mentioned above at the time of installation and uniformly spreads over the test object 1, and then the air cylinder 1
1, it is brought into close contact with the object 1 to be inspected. After this, Shi.

-1 is because there is no movement relative to the object 1 to be inspected, and as long as the couplant 13 does not flow out or evaporate, the degree of adhesion between the two is sufficiently maintained. Additionally, since the outer surface of the object to be inspected 10 is generally not sufficiently smooth, the couplant 13 has a relatively small amount of outflow due to an effect similar to capillarity, and produces a good contact effect.

On the other hand, when shoes 2 and -S are installed at predetermined positions, since both shoes 2 are smooth, if the couplant material 13 covers the surface of the shoe 3, a good contact state can be obtained at all times. When the flaw detection in the desired area is completed in this way, the air 7rinder 11
The pressure is released, and -3 moves again to another desired area, and flaw detection is carried out again.

In this way, an array consisting of a plurality of transducers used in ultrasonic flaw detection is an electronic scanner that uses several ultrasonic transducers to transmit and receive ultrasonic waves by causing phase interference with each other. 11
! l! The probe 2 was machined between the probe 2 and the object to be tested 1 so that one end surface matched the shape of the real test object 1 and the other end surface matched the shape of the transmitting/receiving front surface of the probe 2. V&
-3 is interposed therebetween, and the array-shaped probe protector is configured such that the probe 2 is movable on the -J plane.

Therefore, with this configuration as described above, even if the object 1 to be flawed has an arbitrary curved surface shape, a shoe suitable for its own If shape is used, so that the desired shape of the object to be flawed can be obtained. It is possible to perform ultrasonic flaw detection on the area.

In particular, shi.

-3 and the object to be inspected 1 are not moved relative to each other.
Since the acoustic contact between 1 and the object to be tested 1 is maintained at sufficient pressure, and the play type probe 2 is moved on the smooth surface of 1 and 3, contact between the array type probe 2 and 1 and 1 is maintained. Force flaw detection efficiency with high density (this method is even more effective when the size of the ultrasonic probe 2 becomes large and it is not possible to uniformly contact the entire surface of the array probe with the object to be tested) It is.

Modification of the invention (1) In the above embodiment, the couplant supply hole J6 was provided in the 7U3, but it is also possible to supply the couplant from the vicinity of K, C, and -1 without providing a supply hole. It is also possible to provide fine grooves on the contact surfaces of Y, S, and S to improve the inflow of couplant. As shown in Sara&C,lIB diagram (island) (b), there is a swivel material 23 around the 7 u 3.
It is also possible to provide equiabsorbent materials to constantly compensate for excess or deficiency in % couplant.

(2) In the above embodiment, an example was described in which the present invention was applied to an object to be tested having a circular curved surface, but of course it can be easily applied to an object to be tested having a flat plate shape.

(3) In the above explanation, the array solder probe 2 is moved on the shoe 1, but it can be easily applied even when the shoe 1 is a liquid such as water, and the acoustic transmission efficiency is can be made even more internal.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, the present invention is extremely reliable and can maintain sufficient contact efficiency between the probe and the object to be tested to improve the flaw detection efficiency (ultrasonic transmission/reception efficiency). We can provide a high-play Otori probe holder.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are configuration diagrams showing one embodiment of the present invention, and FIGS. 11E2 (a) and (b) are 7. Figure 13 (1) (b) is a diagram showing another embodiment of the present invention. 1... Object to be inspected, 2... Array type probe, 3...
1-・4...Guide rod, 5...Support plate, 6...
·Three! , 7... Case, 8... Spring, 9...
・Fixed support frame, 10-support 'ltl rod, 11... Air cylinder, 12... Holding plate, 13... Coupling material, 1
4.15... Supply/My f, 16... Supply hole, J7
... Conduit, 22 ... Vibrator, 2S ... Sponge material. Author's agent Patent attorney Suzue Takehiko Figure 1 (a) 2! ! I (a)

Claims (1)

[Claims] In an array type probe made by arranging a plurality of transducers used in electronic scanning ultrasonic flaw detection, which uses a plurality of ultrasonic transducers to transmit and receive ultrasonic waves by causing phase interference with each other,
A wire is interposed between the probe and the object to be tested, one end surface of which is processed to match the shape of the object to be tested and the other end surface to match the shape of the transmitting/receiving front surface of the probe, and the V1 - An array-shaped probe holding stem characterized in that the probe is configured to be movable on a surface.