Ultrasonic detection method and system
An ultrasonic detection and signal detection technology, applied in ultrasonic/sonic/infrasonic diagnosis, analysis of solids using sonic/ultrasonic/infrasonic waves, and sonic diagnosis, etc. The effect of reducing computational complexity, simple and easy hardware system, and beneficial to actual control
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[0049] Example 1
[0050] An ultrasonic testing system includes many parts. According to the actual needs of the signal synthesis process, the transducer performance, amplifier, propagation medium and other factors are all considered in the time-domain impulse response h(n) of the testing system. In this way, the time-domain mathematical model of the ultrasonic testing system is:
[0051] y(n)=x(n)*h(n)
[0052] That is, the detection signal y(n) is the convolution result of the electrical excitation signal x(n) and the time-domain impulse response h(n) of the detection system.
[0053] The specific steps for calculating the optimal excitation signal can be divided into five steps:
[0054] (1) Use a preset electrical excitation signal x 1 (n) (can be sharp pulse, step pulse or other broadband signal), the detection signal y is measured by exciting the transducer 1 (n);
[0055] (2) According to y 1 (n)=x 1 (n)*h(n), deconvolution to solve the time-domain impulse response h(n) of ...
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