Nondestructive testing method based on synthetic aperture ultrasonic imaging technique

Abstract

The invention discloses a nondestructive testing device and method based on a synthetic aperture ultrasonic imaging technique, mainly for the detection of defects in a concrete structure. The nondestructive testing device based on the synthetic aperture ultrasonic imaging technique comprises a signal excitation module for generating large power pulse signals, a signal transmission receiving module connected with the signal excitation module, a signal acquisition module connected with the transmission receiving module, and a signal processing module and a display module based on the synthetic aperture ultrasonic imaging technique, wherein the signal processing module is connected with the signal acquisition module; and the display module is connected with the signal processing module and is used for visibly demonstrating the whole detection result in a color image mode. By utilizing the nondestructive testing device and method, unnecessary detection and calculation on non-defect areas are avoided, the cost is saved, and the precision degree in detection is improved.

Description

technical field [0001] The invention discloses a device and method for non-destructive testing of concrete structures, in particular, the grouting quality of prestressed duct bellows in bridge T beams and box beams, belonging to the technical field of ultrasonic non-destructive testing. Background technique [0002] Whether it is industrial and civil buildings, or highways, railways, water conservancy and hydropower projects, etc., concrete materials are widely used, and the quality of concrete is related to the quality of the entire project. The traditional method of concrete inspection is to randomly select samples at the pouring site, conduct compressive strength tests on the samples, and evaluate the strength of the concrete by the test results. This detection is not representative of all situations and is destructive. In recent years, non-destructive testing technology has attracted more and more attention as an effective method for testing the quality of concrete. ...

AI Technical Summary

Problems solved by technology

However, the characteristics of concrete itself make the attenuation of high-frequency bands larger, and at the same time, the directivity of waves propagating in concrete is also poor.

Therefore, the accuracy and precision of the current devices and methods of detection cannot meet the engineering requirements, and misjudgments often occur in actual measurements.

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