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MIRROR-SHADOW METHOD FOR ULTRASONIC INSPECTION WITH DIFFERENTIAL COMPENSATION FOR INTERFERING FACTORS
MIRROR-SHADOW METHOD FOR ULTRASONIC INSPECTION WITH DIFFERENTIAL COMPENSATION FOR INTERFERING FACTORS
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机译:具有干扰因素的微分补偿的超声检查的镜像阴影法
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摘要
FIELD: physics.SUBSTANCE: method includes forming a first and a second measurement channel, comprising generator-receiver pairs of electroacoustic converters and displaced in space on the axis of movement, wherein the centres of the acoustic axes of all converters lie on the same line in a row such that the displacement between the centres of receivers is equal to the displacement between the centres of generators; receiving a differential signal from the outputs of said channels and comparing the strength of said signal with a rejected level, and determining the presence of a defect from the decrease in the strength of the differential signal.EFFECT: high reliability of ultrasonic inspection.13 cl, 22 dwg
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