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Dual-probe manual ultrasonic detection method

A manual detection and detection method technology, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc., to achieve the effect of simple and easy operation, increasing the detection angle range, and accurately measuring the height of defects

Active Publication Date: 2014-01-22
HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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Problems solved by technology

3) It is greatly affected by factors such as operators, instruments, materials, methods, and environments
However, the A super-reflective method is simple to operate, flexible in method, changeable in direction, mature in technology, widely used, and generally not limited by the thickness and shape of the workpiece. It cannot be completely replaced by other methods for a long time in the future.

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Embodiment Construction

[0030] The present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings. The features of the present invention will become clearer and more specific with these descriptions.

[0031] figure 1It is a schematic diagram of a conventional ultrasonic testing device. The detection method is: A-ultrasonic flaw detector 1, monoclinic probe 2, test block selected according to JB / T4730.3-2005 standard. Adjust the linearity of the instrument, set various instrument parameters, and determine the detection sensitivity to draw the DAC curve. Then increase the sensitivity by several decibels based on the set sensitivity. Do zigzag scans on the workpiece to be inspected, front and back, left and right; horizontal parallel (or oblique parallel) scans. When the internal defects of the workpiece are found, the defects are scanned in the form of front and back, left and right, corners, and surrounds. Based on the DAC curve, th...

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Abstract

The invention provides a dual-probe manual ultrasonic detection method, and belongs to the field of conventional A ultrasonic detection. The method is a new detection method which is added when a manual A ultrasonic detection reflection method is used for performing normal detection. Particularly, main characteristics that a reflection angle of acoustic beams of ultrasonic waves in the same medium is equal to an incidence angle, wave mode switching is performed, and the like are used; two discrete probes, namely, a transmitting probe and a receiving probe, are used; and the position of the receiving probe is changed, so that direction flaws which form certain angles with the incidence acoustic beams are detected.

Description

technical field [0001] The invention relates to an ultrasonic dual-probe manual detection method, in particular to a dual-probe manual reflection ultrasonic detection method. Background technique [0002] At present, there are many non-destructive internal inspection methods at home and abroad, but there are two commonly used methods: radiographic inspection and ultrasonic inspection. The types of ultrasonic inspection are mainly divided into three types: A hyperreflection method, time-of-flight diffraction method, and phased array method. At present, the detection rate of defects in the industry at home and abroad is generally believed that: the time-of-flight diffraction method is the highest, the radiographic inspection method is in the middle, and the A hyperreflection method is the lowest. However, since the shape, size, and processing method of the workpiece to be inspected are changeable, and the size, shape, direction, and nature of the defects generated during the ...

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Application Information

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IPC IPC(8): G01N29/04
Inventor 邓显余赛鹏王佐森周海波邓屾李港尹闻闻
Owner HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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