JPH0219734Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a probe holding device for smoothly moving a probe for ultrasonic flaw detection on a surface to be measured.

Conventionally, when scanning with a probe in automatic flaw detection, the probe is either brought into direct contact with the probe or a guide is provided to float the probe, but the surface to be measured is curved or uneven. However, there was a problem that the probe did not follow the directions smoothly.

The present invention was developed to solve this problem by moving the probe smoothly over the surface to be measured.
It is an object of the present invention to provide a probe holding device that can follow curved surfaces and unevenness and is easy to maintain.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a holding device to which a contact probe is attached. Place the probe 1 in a holder 3 with at least three or, for example, four wheels 2 that rotate in the same direction, with the probe contact surface parallel to the bottom surface of the wheels so that the probe surface is slightly lifted. Attach it. Here, the first frame 4 swings relative to the holder 3 using the first frame movable pivot 5 as a fulcrum.

The second frame 7 swings relative to the first frame 4 using the second frame movable pivot 6 as a fulcrum. Here, the first frame movable pivot 5,
The second frame movable pivots 6 are located at mutually orthogonal positions relative to the probe 1.

FIG. 2 is a side view of a probe holding device attached to a surface to be measured inclined in the direction in which the wheels travel.

A holder 3 to which a probe 1 is attached is kept parallel to a surface to be measured 8 by wheels 2. However, the first frame 4 can be kept horizontal due to the pivot 5 for moving the first frame. Furthermore, when the surface to be measured is inclined in the axle direction, the second frame movable pivot 6 can keep the second frame 7 horizontal.

It goes without saying that the probe referred to here includes not only a normal contact type probe but also one in which a shoe made of acrylic or rubber is bonded to the ultrasonic generation side.

Figures 3a and 3c show the wheel 2 with reference to Figure 3b.
This figure shows the difference in the contact situation between the uneven surface 8 to be measured and the probe 1 when the distance between them is different.

When the wheel interval is longer than the end face of probe 1 (third
If it is too short (FIG. 3 c), the distance between the probe 1 and the surface to be measured may be too large, or the end of the probe may come into contact with the surface to be measured. However, when the wheel center position coincides with the end of the probe (FIG. 3b), the probe 1 and the surface to be measured 8 are in the best contact state. In the embodiment shown in FIG. 5, which will be described later, it is assumed that the center position of the wheel substantially coincides with the end of the probe.

FIG. 4 is a sectional view of the vicinity of the holder 3 when the center of the wheel 2 is located at the end of the probe.

By attaching the wheel 2 to the side surface of the holder 3, the wheel 2 can be attached to the side surface of the probe 1, and the center of the wheel 2 can be positioned at the end of the probe 1.

5a, b, and c are a front view, a top view, and a side view showing the pivot bearings of the movable parts of the wheel 2, the first frame 4, and the second frame 7, respectively.

By using pivots in each part in this way, the movable parts rotate smoothly. That is, the pivot receiver is brought into point contact with the groove and is movably supported there.

FIG. 6 is a cross-sectional view when a partial immersion probe is used in the probe section.

Probe 1 in partial water immersion probe case 11
is in contact with the surface to be measured 8 via an ultrasonic propagation medium 12 such as water sealed by a rubber film 13 . At this time, the surface to be measured 8 and the probe 1 are kept parallel to each other by the wheels 2 attached to the holder 3 integrated with the probe case 11 for partial immersion. In this case as well, the second frame 7 can be kept horizontal as explained with reference to FIG.

Note that the same effect can be obtained even if a water immersion probe is attached instead of using a partial water immersion probe as shown in Figure 6, and the entire holding device is completely immersed in an ultrasonic propagation medium such as water. can get.

As explained above, according to the present invention, the probe attached to the wheeled holder can smoothly follow curved and uneven surfaces and move easily, and the frame can be kept horizontal, allowing automatic scanning. The frame can be driven by a scanner. In addition, by locating the center of the wheel on the end face of the probe, it is possible to better follow even small irregularities, and by using a pivot bearing for flaw detection work that is often performed in harsh environments,
It is possible to solve the problem of wheels becoming difficult to rotate due to dirt clogging, etc. that occurs when bearings are used.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a side view when installed on an inclined surface to be measured, and Figures 3a, b, and c are diagrams showing the relationship between the wheel center spacing and the probe length. Figures when the center distance is long, the same, and short; Figure 4 is a cross-sectional view of the holder part when the center of the wheel is located at the end of the probe; Figures 5a, b, and c are Each front view, plan view, and side view of an embodiment using a pivot bearing part, and FIG. 6 is a sectional view of an embodiment using a partial immersion method probe as a probe. In the figure, 1 is the probe, 2 is the wheel, 3 is the holder, and 4
is the first frame, 5 is the pivot for movable the first frame, 6 is the pivot for movable the second frame, and 7 is the pivot for movable the second frame.
frame, 8 is the surface to be measured, 9 is the pivot pin, 1
0 is the pivot, 11 is the partial immersion probe case,
12 is an ultrasonic propagation medium such as water, and 13 is a rubber film.

Claims (1)

[Claims for Utility Model Registration] A holder for holding an ultrasonic probe; three or more probes connected to the holder are arranged to rotate in the same direction, and the distance between their centers is approximately equal to the length of the probe. characterized by having matched wheels, a frame coupled to an external scanner, and a pivot bearing for freely bending the holder about a fulcrum located perpendicular to each other with respect to the frame and keeping the frame level. Ultrasonic probe holding device.