Rapid ultrasonic plane wave imaging detection method based on spatial weighted optimization

Abstract

The invention provides a rapid ultrasonic plane wave imaging detection method based on spatial weighted optimization. The method comprises the following steps: collecting plane wave data; calculatinga spatial weight by setting an ultrasonic plane wave effective action area at each angle, and obtaining a plane wave image in the effective action area at each angle by calculating the delay of each pixel point; repeatedly combining and superposing the plane wave imaging result and the space weight under a single angle to obtain a plane wave imaging result under multiple angles and a total weighton an imaging space; and optimizing the ultrasonic multi-angle plane wave composite imaging result by using the total weight in the imaging area to obtain a final imaging result. According to the method, on the basis of guaranteeing the defect detection spatial resolution, rapid defect imaging and small defect amplitude attenuation are achieved, and the detection capacity and the imaging frame rate of plane wave imaging are effectively enhanced under the small effective aperture.

Description

technical field [0001] The invention belongs to the fields of ultrasonic imaging and nondestructive testing, and relates to a fast ultrasonic plane wave imaging detection method with space weighting optimization. Background technique [0002] In industrial non-destructive testing, compared with traditional ultrasonic testing technology, ultrasonic phased array imaging technology can achieve high-sensitivity dynamic focus scanning without moving the probe. There are more and more applications. However, due to the slow imaging rate, imaging methods such as ultrasonic phased array full focusing with higher resolution and detection capabilities are difficult to apply to real-time detection in industry. [0003] Ultrasonic plane wave imaging detection method has become a research hotspot at home and abroad in recent years because of its faster imaging speed. As far as the current research progress is concerned, the rapid imaging of defects is mainly realized by ultrasonic plane...

AI Technical Summary

Problems solved by technology

The improvement of detection range and defect imaging ability is also very important, especially in industrial inspection, the geometric shape of the object to be inspected is usually complex, which limits the effective aperture of the probe, which usually results in a decline in detection capability

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