Particle polarization direction controlling and scanning detection method
A technology of polarization direction and scanning detection, which is applied in the direction of measuring devices, material analysis using sound waves/ultrasonic waves/infrasonic waves, instruments, etc., which can solve the problems of energy dispersion, different propagation speeds, and difficulty in centralized utilization, etc.
Active Publication Date: 2019-01-04
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology
However, due to the polarization properties of sound waves, one type of sound wave (such as longitudinal or shear waves) can only detect certain types of defects, or only specific areas of the medium
The flexibility and reliability of detection are greatly limited
[0003] When sound waves propagate in solid media, there are many different types of waves, such as longitudinal waves, transverse waves, and guided waves. Each sound wave has different propagation characteristics, carrying different characteristics of the medium and defects, but due to their different propagation speeds , so the energy is dispersed and it is difficult to concentrate
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[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0025] figure 1 It is a flow chart of a particle polarization direction control and scanning detection method. Such as figure 1 As shown, a particle polarization direction control and scanning detection method, the steps are as follows:
[0026] Step S101: Using pulse signals of the same form to separately excite multiple transducers arran...
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The invention discloses a particle polarization direction controlling and scanning detection method, including the steps of arranging multiple transducers at different positions of a dielectric surface, exciting the transducers by pulse signals of the same form, determining time delay of exciting signals of the transducer according to sonic path different between different transducers and the preset focus and propagation velocity of sound wave in media, and allowing the sound wave propagated along different direction and excited by the transducers at different positions to reach the sound wavepreset focus position; composing multiple sound wave polarization directions of the sound wave propagated along different directions, at the preset focus position, to obtain the preset-focus sound wave total polarization direction; changing positions of the transducers on the dielectric surface, and / or changing amplitude and / or phase of pulse exciting signals, and controlling and scanning the preset-focus polarization direction.
Description
technical field [0001] The invention relates to the field of ultrasonic detection and imaging, in particular to a particle polarization direction control and scanning detection method. Background technique [0002] In recent years, ultrasonic testing and imaging have achieved rapid development, and related instruments and equipment have been applied to various fields of ultrasonic testing. However, due to the polarized nature of sound waves, one type of sound wave (such as longitudinal or shear waves) can only detect certain types of defects, or only detect specific areas of the medium. The flexibility and reliability of the detection are greatly limited. [0003] When sound waves propagate in solid media, there are many different types of waves, such as longitudinal waves, transverse waves, and guided waves. Each sound wave has different propagation characteristics, carrying different characteristics of the medium and defects, but due to their different propagation speeds ...
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Login to View More IPC IPC(8): G01N29/22
CPCG01N29/221
Inventor 阎守国张碧星黄娟
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI