Ultrafast photoacoustic imaging nondestructive testing system and method

Abstract

The invention discloses an ultrafast photoacoustic imaging nondestructive testing system and method. The ultrafast photoacoustic imaging nondestructive testing system comprises a laser device, a laserbeam expanding device, a photoacoustic excitation and sensing integrated device, a peak detection device, a memory area array, a read-out shift register and a background image processing device. Thelaser device is located above the laser beam expanding device, and the laser beam expanding device is located above the opto-acoustic excitation and sensing integrated device. According to the invention, the peak value of the received electric signal is extracted through the peak value detection device, and the data acquisition and processing rate is greatly improved. The photoacoustic excitationand sensing integrated device can realize integration of laser area array excitation and ultrasonic signal area array receiving on the same side. Mechanical scanning is not needed any more. The problem that traditional ultrasonic imaging is low in imaging speed due to the fact that received data are huge and data processing is complex is solved, a detected object can be rapidly imaged at a time within the range of the opto-acoustic excitation and sensing integrated device, and guiding significance is achieved in practical application.

Description

technical field [0001] The invention relates to the technical field of ultrasonic testing, in particular to an ultrafast photoacoustic imaging nondestructive testing system and method. Background technique [0002] At present, ultrasonic imaging testing is widely used in industrial non-destructive testing due to its non-invasiveness, strong penetrating ability, and high defect sensitivity. However, the current conventional ultrasonic scanning imaging generally uses a single probe or a linear array probe to scan and image the detection area section by section through a mechanical scanning device. This method is time-consuming and expensive, which greatly limits the imaging speed. The use of phased array probes through electronic scanning imaging has initially solved the problem of slow imaging speed of traditional mechanical scanning, but the array element size of phased array probes limits its imaging resolution, and due to the huge amount of received data and the The proce...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an ultra-fast photoacoustic imaging non-destructive testing system and method, which are used to solve the technical problem that high-speed imaging cannot be realized in the ultrasonic imaging technology in the prior art when the received data is huge and the data processing is complicated.

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