Phase weighting vector fully focusing imaging device and method for identifying forge piece cracks quantitatively

Abstract

The invention relates to a phase weighting vector fully focusing imaging device and method for identifying forge piece cracks quantitatively. The method comprises the steps: firstly, analyzing phase information of whole matrix data, and extracting to obtain a phase characteristic parameter-a phase consistent factor; then, dividing a whole array into a plurality of sub arrays, and weighting an imaging amplitude value of each sub array by using the provided phase characteristic parameter, to obtain a phase weighted imaging amplitude value matrix; multiplying the two results to further obtain a weighted characteristic vector of each sub array; finally, compositing the weighted characteristic vectors of all the sub arrays, conducting global treatment on the amplitude value of the composite characteristic vector, in other words, making the amplitude value of the composite characteristic vector be equal to the amplitude value, at any imaging point, of obtained phase-weighted imaging of the whole array, and thus obtaining the amplitude vector, at any imaging point, of the whole array; and ultimately, extracting a local vector diagram of a target defect according to a defect position, and determining the direction of the target defect by means of the direction of the vector in the local vector diagram.

Description

technical field [0001] The invention relates to a vector total focus imaging method based on phase weighting, in particular to an ultrasonic array detection method for quantitative identification of forging cracks, belonging to the field of non-destructive testing. Background technique [0002] Forgings are important basic components necessary for major national technical equipment and major projects. They are widely used in pressure vessels of nuclear power plants, low-pressure rotors of generator sets, and core components of various heavy machinery. With the rapid development of the national economy, the demand for large forgings will also increase. In practical engineering applications, due to the harsh working environment, large forgings often need to withstand complex stress, shock vibration and heavy loads. At the same time, due to the many production processes and long production cycles of large forgings, there are many factors affecting their quality, which makes it...

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Problems solved by technology

[0007] The advantage of this patent lies in the comprehensive utilization of the amplitude and phase information of the detection signal, which overcomes the fact that when only the amplitude information is used, the imaging results are greatly affected by noise, side lobes and grating lobes, the signal-to-noise ratio and resolution are low, and the defect quantification The disadvantage of large error is a high-precision array imaging method

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