Adaptive program-controlled receiving and processing device and method for electromagnetic ultrasonic echo signal

Abstract

The adaptive program-controlled receiving and processing device of the electromagnetic ultrasonic echo signal includes a signal conditioning module, the signal conditioning module is connected with the signal sampling and processing module; the signal sampling and processing module is connected with the processing chip; the processing chip is connected with the PC; the processing chip is connected with the The human-computer interaction module is connected; the processing chip is connected to the voltage control signal module; the processing chip is connected to the NAND FLASH; the processing method includes the following steps: 1) amplify the original signal waveform and send it to a high-speed analog-to-digital converter for sampling; 2) read the current signal Peak-to-peak value, the processing chip reduces the current amplification gain multiple or increases the current amplification gain multiple according to the analog-to-digital conversion result; 3) adjusts the amplitude of the electromagnetic ultrasonic echo signal through gain conversion, sends it to the analog-to-digital converter, and records each gain parameter at the same time , when it is displayed, it will be correspondingly converted to restore the original waveform; the electromagnetic ultrasonic echo signal can be received and digitally processed in a high-interference electromagnetic environment, ensuring the accuracy of the measurement.

Description

technical field [0001] The invention relates to the technical field of non-destructive detection signal processing, in particular to a digital electromagnetic ultrasonic signal receiving and processing device with self-adaptive function and a method thereof. Background technique [0002] Ultrasonic testing is one of the main technologies of non-destructive testing today, and it is widely used in online quality control and safety testing of key components of in-service equipment. [0003] At present, piezoelectric ultrasonic testing is basically used in non-destructive testing. Piezoelectric ultrasonic transducers need to use the piezoelectric effect of piezoelectric wafers to transmit and receive ultrasonic surface waves, which requires a high degree of smoothness on the surface of the tested piece and a coupling medium. The disadvantages severely limit the application of piezoelectric ultrasonic testing in the field of flaw detection and testing. With the advancement of sc...

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Problems solved by technology

[0004] Domestic research on electromagnetic ultrasonic technology started late. The electromagnetic ultrasonic receivers currently on the market are relatively large in size, and the echo signal processing needs to be manually switched and segmented according to the signal size. This processing method not only requires complex hardware circuits but also There is a certain lag to the echo signal, and it will cause interference; at the same time, most of the current electromagnetic ultrasonic receiving devices do not have the function of data communication based on high-speed network

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