JPS5858023B2 - Test reference body for adjusting ultrasonic inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a test prototype (reference body) for carrying out an adjustment method for an ultrasonic inspection apparatus.

As is well known, inspection equipment that performs non-destructive testing of materials is
Prepared using test samples.

This test sample must match the dimensions of the test specimen and, in addition, the material of the test sample must have the same acoustical properties as the subject.

Depending on the type of test, the applicable regulations or the purpose of the test, the test sample shall be provided with grooves, notches and/or holes of the specified depth, width and length.

The use of such test samples for adjusting test equipment often proves to be insufficient.

This is especially true in the case of test samples made from unprocessed pipes, strips, etc.

This is especially true in the case of test samples.

Another disadvantage of test samples is that their production is very expensive and time-consuming, and that the predetermined test defects can only be provided after the cut surface of the object to be inspected has been measured.

A further disadvantage is that the test samples are heavy.

For example, in the case of large test specimens such as large diameter pipes, the test samples in today's working practices are too heavy to accommodate, requiring additional aids such as cranes or automobiles. Unless it is used, it cannot be handled.

Another major problem concerns the storage of these test samples.

However, an essential drawback is that conventional methods have poor reproducibility of test conditions.

It is therefore an object of the invention to be able to reproducibly adjust a testing device for non-destructive testing, completely independent of the operator, and to do so simply and in a technically improved manner. The objective is to provide a test prototype or calibration standard that can be used.

In order to achieve the above object, the present invention proposes a test prototype or calibration standard having the following characteristics.

That is, a reflector having a reflective surface inside the cylindrical sleeve is installed inside the cylindrical sleeve, and these sleeve handles are tilted at the outlet end of the calibration reference body. a slit, a plurality of diagonal holes terminating in the reflective surface, and two opposed right-angled slits provided in the sleeve at the end opposite the flapper. or a calibration standard.

Note that it is preferable to provide four slits and four diagonal holes.

The diagonal hole has a 45 degree slope. The calibration standard according to the invention with a reflector is bayonet-shaped and held in a clamping sleeve for accommodating a probe with said right-angled slit in order to reproducibly adjust an ultrasound examination device. Ru.

The couplant (water) is injected into the test standard through a long slit.

The diagonal hole serves as a vent to prevent air bubbles from remaining in front of the reflector.

The reflective surface serves to generate a predetermined ultrasonic signal for adjusting the inspection device.

The slope of the reflector body serves to avoid back wall echoes caused by the ends of the reflector body.

According to the calibration standard body according to the present invention, it becomes possible to adjust the testing device without using a conventional test sample.

The same calibration standard can be used for measurements of all test samples.

One calibration standard is sufficient for all probe holders used for the various testing functions of the testing device.

Unlike traditional test samples, test standards are easy to handle and designed according to the size of the probe.

The invention will now be described in detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

The test reference body shown in FIGS. 1 and 2 consists of a sleeve 1, a fluffer 2 inserted into the sleeve, and a reflective surface located inside the sleeve.

The sleeve 1 is provided with a plurality of slits 4 and a plurality of diagonal holes 5 terminating at the reflective surface 3 .

Furthermore, the sleeve 1 is provided with two oppositely formed right-angled slits 6 at the upper edge of the sleeve, using which the calibration standard can be attached to a clamping sleeve for accommodating the probe. It is inserted and held like a bayonet.

Test data related to the test standards necessary to adjust the test equipment, such as travel time for symptom expectation range (AEB) and test sensitivity, may be verified empirically or tested depending on the purpose of the test. be confirmed before.

This operation can also be carried out on samples with natural or artificially introduced defects.

When all measurement test data necessary for the test have been transferred to the calibration reference body, the testing device is adjusted to the operating state via the calibration reference body.

This adjustment process proceeds as follows.

(1) First, a calibration standard is inserted into a probe to be placed on a straight measuring section (measuring plane) and immersed in a couplant.

In this case, the couplant (water) enters through a long slit in the calibration standard formed for the medium, and the air that was in the calibration standard flows through the obliquely provided hole 5. leak.

(2) The transit time is adjusted by the ultrasonic electronic device according to the dimensions of the test material, taking advantage of the result of the surface echo of the reflective surface 3 reverberating many times.

(3) Subsequently, the symptom expectation range (AEB) is adjusted, in which case the surface echo of the reflective surface 3 serves as a reference point.

(4) Subsequently, the reference echo is used to adjust the test sensitivity to the required or prescribed test sensitivity.

At first, a test sample is created, but after a long period of comparison between the test sample and the calibration standard, the production of the test sample can be canceled, and the subsequent testing equipment can be used. Finally, it should be mentioned that adjustments only need to be made in relation to the calibration standards mentioned above.

Additional relationship The present invention relates to an "ultrasonic inspection device" that implements the invention "Method for adjusting a US test device for a subject in the production process" of Patent No. 1150366 (Japanese Patent Publication No. 57-40463) pertaining to the original application. Since it is a test reference body for adjustment, it falls under the provisions of Article 31, Paragraph 1, Item 3 of the Patent Law, and has an additional relationship.

[Brief explanation of the drawing]

FIG. 1 is a front view of a test reference body according to the present invention, and FIG. 2 is a side view of the test reference body of FIG. 1 cut away. 1...Sleeve, 2...Reflector,
3... Reflective surface, 4... Slit, 5...
...Diagonal hole, 6...Right angle slit.

Claims (1)

[Claims] 1. A reflector 2, which is a test reference body for carrying out an adjustment method for an ultrasonic inspection device and has a reflective surface 3 inside the cylindrical sleeve, is installed in the cylindrical sleeve 1, These sleeve flaps are inclined at the outlet end of the calibration standard, said sleeve 1 having a plurality of slits 4 and a plurality of diagonal holes 5 terminating in reflective surfaces 3, facing the sleeve flaps. A test reference body characterized in that it is provided with two opposite right-angled slits 6 provided at its opposite ends. 2. Test reference body according to claim 1, characterized in that it is preferably provided with four slits and four diagonal holes. 3. Test reference body according to claim 1 or 2, characterized in that the oblique hole preferably has an angle of inclination of 45 degrees.