Imperfect interface contact state nonlinear ultrasonic evaluation method based on micro texture
A non-linear ultrasonic and contact state technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, process detection response signals, etc., and can solve problems such as not considering ultrasonic scattering effects
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[0089] Such as Figure 1-7 As shown, the present invention will be further described below in conjunction with specific embodiments:
[0090] The test device used in the present invention is such as figure 1 Shown, including: pressure testing machine 1, rubber pad 2, bracket 3, excitation transducer 4, function generator 5, power amplifier 6, low pass filter 7, test piece 8, receiving transducer 9, digital oscilloscope 10. Computer 11. It is characterized in that the computer 11 controls the stroke of the pressure testing machine 1 to apply different pressures to the workpiece; the output end of the function generator 5 is connected to the input end of the power amplifier 6, and the output end of the power amplifier 6 is connected to the input end of the low-pass filter 7, The output end of the low-pass filter 7 is connected to the excitation transducer 4, the receiving transducer 9 is connected to the input channel of the digital oscilloscope 10, and the digital oscilloscope 10 ...
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