A test block for measuring the refraction angle of an ultrasonic oblique probe and its measuring method
An oblique probe and ultrasonic technology, which is applied to the test block used to measure the refraction angle of an ultrasonic oblique probe and its measurement field, can solve the problems of increasing measurement errors, etc., achieve simple appearance, solve the incident point and refraction angle measurement, and be easy to use Effect
Active Publication Date: 2016-08-17
CGNPC INSPECTION TECH +3
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Problems solved by technology
The above measurement methods require the use of measuring instruments and calculations and look-up tables, which increases the measurement error
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[0014] The present invention will be described in further detail below in conjunction with specific examples. It should be understood that these embodiments are used to illustrate the basic principles, main features and advantages of the present invention, and the present invention is not limited by the scope of the following embodiments. The implementation conditions used in the examples can be further adjusted according to specific requirements, and the unspecified implementation conditions are usually the conditions in routine experiments.
[0015] as shown in the picture 1 As shown, a test block used to measure the incident point and refraction angle of the ultrasonic oblique probe 1 , the test block 1 is a quarter cylinder, the test block 1 Include the first arc surface BC , the bottom AB , vertical plane AC and the sides located on the front and rear sides, the bottom surface AB with the vertical plane AC Vertically, the angle scale is ...
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Abstract
The invention relates to a test block for measuring the incident point and refraction angle of an ultrasonic oblique probe, which is characterized in that: the test block includes a quarter cylinder, and the quarter cylinder includes a first The arc surface, the bottom surface, the vertical surface and the sides located at the front and rear sides, the bottom surface is perpendicular to the vertical surface, and the angle scale is engraved on the edge of the side surface close to the first arc surface. The ultrasonic test block and measuring method provided by the present invention can be used for the ultrasonic inspection of the longitudinal weld of the cylinder body, the ultrasonic inspection of the axial defect of the girth weld, and the arc surface of the ultrasonic inspection of the axial defect of the pipe and bar which are widely used at present. Measurement of the incident point and refraction angle of the oblique probe; according to the characteristics of ultrasonic reflection, the present invention designs a special test block for the curved ultrasonic oblique probe. The shape of the test block is simple and easy to use.
Description
technical field [0001] The invention relates to a test block for measuring the refraction angle of an ultrasonic oblique probe and a measuring method thereof. Background technique [0002] In the prior art, the method for measuring the incident point and refraction angle of the ultrasonic probe is cumbersome and has low accuracy. For example, the water chestnut reflection method is commonly used to measure the incident point at present, place the arc surface of the probe wedge on the water chestnut of the test block, move the probe back and forth, so that the point corresponding to the water chestnut of the test block when the water chestnut reflected wave is the highest is the probe incident point. The method of measuring the refraction angle: first process a solid cylindrical test block, the radius of curvature of the test block is the same as that of the workpiece, and process a horizontal hole near the surface of the test block. Then place the probe on the test block, m...
Claims
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IPC IPC(8): G01N29/30
Inventor 马文民陈智聪孙加伟余哲马官兵
Owner CGNPC INSPECTION TECH