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NON-DESTRUCTIVE TESTING METHOD AND DEVICE OF PHYSICAL PROPERTY OF WORKPIECE ABSORBING BEAM WITHOUT PHYSICAL CONTACT
NON-DESTRUCTIVE TESTING METHOD AND DEVICE OF PHYSICAL PROPERTY OF WORKPIECE ABSORBING BEAM WITHOUT PHYSICAL CONTACT
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机译:无物理接触的工件吸收梁的无损检测方法及物理性能的装置
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摘要
A method and device which measures the velocity of ultrasonic waves in a moving web is disclosed. The excitation source is a laser or other device which produces short intense light pulses and the detection system is either a piezoelectric transducer or a microphone. The latter obviates any need for physical contact with the web in order to carry out tests for strength parameters as the web is manufactured.
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