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 and process detection response signals, and can solve problems such as ultrasonic scattering effects not considered
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[0089] like Figure 1-7 Shown, the present invention will be further described below in conjunction with specific embodiment:
[0090] The test device that the present invention adopts is as figure 1 As shown, it includes: 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 ...
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