Focused acoustic array imaging method and system

Abstract

The invention discloses a focused acoustic array imaging method and system, and the method comprises the steps: obtaining echo data of an imaging region through employing a single-array-element transmission and all-array collection mode, transmitting and traversing all array elements, and obtaining all echo data as full-matrix data; calculating a delay index table of the whole imaging area; taking a main diagonal line of the full matrix data as a reference, and calculating to obtain a reference image according to the delay index table; calculating a focused image by using secondary diagonal data of the full-matrix data according to the delay index table and echo data corresponding to the secondary diagonal, and superposing the focused image with the reference image; and continuing to gradually move towards the two sides until the superposed focused image meets the image quality requirement. According to the focused acoustic array imaging method and system, the focusing imaging real-time processing speed is increased, the target image with the better signal-to-noise ratio can be obtained according to needs, the acoustic array imaging result is greatly improved, and the acoustic array detection performance is improved.

Description

technical field [0001] The invention relates to acoustic array imaging technology, in particular to a focused acoustic array imaging method and system. Background technique [0002] Acoustic array imaging is of great significance to industries such as industrial non-destructive testing, medicine and underwater testing, and has been widely used in recent years. For the consistency and brevity of the description, all the following descriptions will be made by taking the ultrasonic array detection in the industrial detection as an example. [0003] Ultrasonic array testing technology is based on ultrasonic array transducers, using ultrasonic longitudinal waves or transverse waves (as shown in Figure 1(a) and Figure 1(b)), a method for non-destructive testing of industrial parts. Ultrasonic array detection technology can also be used to detect complex materials such as composite materials. This method has great flexibility and can detect parts with irregular shapes. Compared w...

AI Technical Summary

Problems solved by technology

[0004] At present, the disadvantage of the full-focus acoustic array imaging technology is that it has a huge amount of data and requires a large amount of storage space; at the same time, using full-matrix data to perform focused imaging on all focal points requires a huge amount of calculation and takes a long time to calculate.

Taking a 16-element phased array probe as an example, when the sampling depth of each A-scan echo signal is 2000, a complete...

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