Calculation Method of Radiation Deflection Sound Field Diffusion Angle of Linear Phased Array Ultrasonic Angled Probe

Abstract

The invention discloses a calculation method for the radiation deflection sound field diffusion angle of a linear phased array ultrasonic oblique probe. The deflection angle of the beam in the wedge, and then use the quantitative refraction of the sound beam on the wedge-workpiece interface to calculate the coverage angle of the deflected sound beam, and obtain the relationship between the sound beam coverage angle and the probe size, deflection angle and wedge related parameters . The invention is beneficial to the selection of a suitable phased array ultrasonic transducer and wedge angle; it is convenient to guide the further research of the detection method and technology.

Description

Technical field [0001] The present invention relates to the field of ultrasonic detection techniques, and more particularly to a method of calculating a linear phase-controlled array ultrasound probe radiation deflection sound field diffusion angle. Background technique [0002] With the rapid development of materials, micromachining, computer and electronic technology, phased array ultrasound detection technology is increasingly applied to industrial non-destructive testing, which is due to its flexible and controllable, reliable, efficient detection , The human factors have a small impact, no radiation without pollution, and the detection results are intuitive and can be saved. The gradual improvement of related theories, the continuous improvement of testing methods, and the gradual recognition, application of relevant standards, equipment and software at home and abroad,, especially in the past two years, greatly promoted the process of related industry standards, further Acc...

AI Technical Summary

Problems solved by technology

The existing method can effectively calculate the dispersion angle of the sound beam after the radiated sound field of a single piezoelectric chip enters the workpiece through the wedge block (that is, the sound beam spread angle of the traditional angle probe), but it cannot calculate the sound beam angle when the phased array ultrasonic angle probe detects. Diffusion angle

At present, the half-diffusion angle of the phased array ultrasonic angle probe is mainly given by numerical simulation or experimental measurement, which cannot give the analytical relationship between the beam spread angle and the parameters of the transducer and wedge, and it is difficult to find that the spread angle varies with the angle probe. The law of parameter changes cannot effectively guide and formulate accurate detection processes

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