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METHOD FOR PROCESSING SIGNALS ACQUIRED BY ULTRASONIC PROBING, CORRESPONDING PROGRAM AND ULTRASONIC PROBING DEVICE
METHOD FOR PROCESSING SIGNALS ACQUIRED BY ULTRASONIC PROBING, CORRESPONDING PROGRAM AND ULTRASONIC PROBING DEVICE
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机译:超声波探伤,对应程序及超声波探伤装置获得的信号的处理方法
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摘要
A method for processing ultrasonic signals includes: controlling a plurality of emission transducers for L successive emissions of ultrasonic waves; controlling N reception transducers to simultaneously receive and for a predetermined time, for each successive emission, N measurement signals; obtaining an array of ultrasonic time signals of size L×N, each coefficient Ki,j(t) of this array representing the measurement signal received by the j-th reception transducer due to the i-th emission; and denoising the time signal array by removing some of the singular values and associated singular vectors obtained from a singular value decomposition of a frequency signal array obtained by transforming this time signal array, and by reconstructing a denoised time signal array based on unremoved singular values and singular vectors.
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