Ultrasonic, vortex and EMAT integrated lossless thickness tester and method thereof

Abstract

The invention relates to an ultrasonic, vortex and EMAT integrated lossless thickness tester and a method thereof. The ultrasonic, vortex and EMAT integrated lossless thickness tester comprises an excitation module, a receiving pre-processing module, an analog switch, an A/D converter, a self-checking module, an MCU, a CPU module, a power supply module and a CPU periphery display storage part, wherein the excitation module is connected with the receiving pre-processing module, the receiving pre-processing module is connected with the analog switch, the analog switch is connected with the A/D converter, the A/D converter is connected with the MCU, the self-checking module is connected with the MCU, and the excitation module comprises an ultrasonic excitation module, a vortex excitation module and an EMAT excitation module; the receiving pre-processing module comprises an ultrasonic receiving pre-processing module, a vortex receiving pre-processing module and an EMAT receiving pre-processing module. The comparability of a measurement result is increased through the integration of the ultrasonic, the vertex and the EMAT, the misjudgment rate caused by measurement through a single method is reduced, and meanwhile the limitation of measurement through the single method is overcome.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and relates to an ultrasonic, eddy current and EMAT integrated nondestructive thickness gauge and a method thereof. Background technique [0002] The long-term use of ferromagnetic pressure-bearing pipes and containers with cladding layers will cause wall thickness reduction due to corrosion. When the wall thickness reduction reaches a certain level, it may fail, resulting in huge economic losses, and even casualties. occur. Therefore, it is very important to measure the thickness of equipment products such as pipelines for oil, water, gas and other media. At the same time, in industrial production and application, it is necessary to quickly and randomly measure the thickness of equipment or products. Large-scale equipment or online systems are difficult to meet the requirements. This requires a portable thickness gauge to achieve high precision, safety and reliability. Non-destr...

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to propose an ultrasonic, eddy current and EMAT integrated non-destructive thickness gauge and its thickness measurement method based on the existing theory of nondestructive testing, combined with today's mainstream thickness measurement technology, through ultrasonic, eddy current and EMAT The combination of the three provides three measurement methods for non-destructive measurement of the thickness of the same specimen, which increases the comparability of measurement results, reduces the misjudgment rate of single-method measurement, and overcomes the limitations of single-method measurement. The large deviation of the measurement results realizes the active self-calibration (validation) function, which overcomes the shortcomings in the existing technology

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