Multi-purpose modularized multi-channel ultrasonic detection system

Abstract

The invention discloses a multipurpose modularized multi-channel ultrasonic detection system which comprises a data conditioning and communication circuit, a multi-path low-frequency excitation acquisition unit circuit, a multi-path high-frequency excitation acquisition unit circuit, a power supply voltage stabilizing circuit, upper computer software, a computer and a sensor array. Excitation acquisition parameters are configured in an upper computer and sent to a data conditioning and communication circuit through a data line connected with a computer, parameter instructions are forwarded to all low-frequency excitation acquisition unit circuits or all high-frequency excitation acquisition unit circuits, and all excitation acquisition units generate excitation signals according to the instructions for ultrasonic excitation. Meanwhile, ultrasonic echo signals are collected and transmitted to the data conditioning and communication circuit for storage, then the ultrasonic echo signals are transmitted to the upper computer through the data communication interface, a data processing algorithm is applied to the upper computer to process data, and a detection result is generated. Modular adjustment configuration can be carried out according to the array sensor and different detection modes, the number of excitation acquisition channels is large, and the excitation signal frequency band range is wide.

Description

technical field [0001] The invention realizes a multi-channel ultrasonic excitation acquisition system capable of modular adjustment and configuration for array sensors and different detection forms, and belongs to the field of non-destructive testing. Background technique [0002] Ultrasonic testing technology is widely used in the field of non-destructive testing. Its basic principle is to use the echo signal generated at the defect when the sound wave propagates in the workpiece to determine the size and location of the defect. According to the different inspection objects, body wave inspection or guided wave inspection can be used to perform non-destructive inspection on workpieces or structures. Waves propagating in an infinite homogeneous medium are called bulk waves, and are generally used to detect defects or damages inside a workpiece, usually requiring higher excitation frequencies. While guided wave testing is usually applied to non-destructive testing of plate s...

AI Technical Summary

Problems solved by technology

[0005] The current commercial ultrasonic testing equipment is expensive, has a single application scenario, and has a high degree of software and hardware integration. It cannot be applied in various testing scenarios and cannot be used for secondary development for research work.

Ultrasonic testing systems applied in laboratory scenarios usually support a small number of testing channels, which cannot be combined and configured. At the same time, they can only excite guided waves or body waves, with a single excitation mode and a narrow frequency range.

It is usually necessary to manually switch the excitation sensor during the experiment, and the process is cumbersome

[0006] Therefore, there is a lack of a multi-channel ultrasonic excitation acquisition system for modular adjustment and configuration for array sensors and different detection forms in the prior art

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