Ultrasonic scanning method for workpieces with continuously variable thickness
A technology of variable thickness and workpiece, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and instruments, etc. It can solve the problems of inaccurate measurement and inaccurate measurement of continuous workpieces, etc., to ensure reliability The effect of precise and accurate detection
Active Publication Date: 2021-12-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0003] The embodiment of the present invention provides a method and scanning method for ultrasonic scanning of continuously variable thickness workpieces and real-time tracking of dynamic gates. This method can solve the problem of inaccurate and inaccurate measurement of continuous workpieces during ultrasonic scanning. The acquisition gate accurately obtains the internal echo information of the measured point, realizes the accurate detection of internal defects of the workpiece, and ensures the reliability of automatic ultrasonic scanning of the workpiece
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[0026] The words "first, second, third, etc." or similar terms such as module A, module B, and module C in the description and claims are only used to distinguish similar objects, and do not represent a specific ordering of objects. It can be understood that Obviously, where permitted, the specific order or sequence can be interchanged such that the embodiments of the application described herein can be practiced in other sequences than those illustrated or described herein.
[0027] In the following description, the involved reference numerals representing steps, such as S110, S120, etc., do not mean that this step must be executed, and the order of the previous and subsequent steps can be interchanged or executed simultaneously if allowed.
[0028] The term "comprising" used in the description and claims should not be interpreted as being restricted to what is listed thereafter; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying th...
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The invention provides a method for real-time tracking of a dynamic gate for ultrasonic scanning of workpieces with continuously variable thickness, comprising the steps of: formulating a scanning trajectory according to the workpiece to be measured; The starting time and gate width of the gate and the data acquisition gate; when the thickness change of the measuring point of the measured workpiece is judged according to the scanning trajectory of the measured workpiece, the acoustic time change of different measured points of the gate is tracked according to the interface echo . Acoustic time changes of different measured points of the bottom echo tracking gate, updating the start time of the bottom echo tracking gate, the start time and gate width of the data collection gate. Also provided is a method for ultrasonic scanning of workpieces with continuously variable thickness. After the above steps, the method includes: obtaining the position information of the measured points of the measured workpiece, and the ultrasonic scanning device obtaining the echo information collected by the data gate at this time, and according to the The echo information is calculated from the ultrasound data.
Description
technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to an ultrasonic scanning method for workpieces with continuously variable thickness. Background technique [0002] In recent years, automated ultrasonic testing technology has developed rapidly and has been widely used in aviation, aerospace, national defense and other fields. Non-contact ultrasonic pulse reflection method is often used in automatic ultrasonic testing, that is, the scanning device clamps the ultrasonic probe and emits pulse waves to the inside of the tested part, and collects the echo information between the interface and the bottom surface of the tested part through the data acquisition gate. Ultrasound scan imaging. In the case of continuous workpiece detection, such as aeroengine blades, hubs and other complex curved surface workpieces, the acoustic time between the ultrasonic interface wave and the bottom surface wave changes continuously with the...
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IPC IPC(8): G01N29/04G01N29/265
Inventor 徐春广马朋志肖定国潘勤学杨博
Owner BEIJING INSTITUTE OF TECHNOLOGYGY