| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of measuring sound elastic stress for removing an influence of a contact medium existing between a probe for sound elastic stress measuring probe and a subject substance to be measured by an SH wave, and to provide a measuring sensor. SOLUTION: Four ultra sonic receiving elements are aligned on a receiver wedge member in a line, the wedge member for the receiver elements is provided with 2 bottom members being in contact with the subject to be measured via a contact medium. To the center parts of the bottom parts each one pair of transmitters are provided with nearly equal to a critical incident anglesθof the ultrasonic wave toward insides. Each pair of the transmitter elements are aligned on the two bottom members with a distance while keeping the same distance as the distance between the two bottom members. An ultrasonic pulse is emitted and a surface SH wave is made to enter the surface of the subject, the surface SH wave is received with two receiving elements from the ultrasonic transmitters, the time difference of the two receiver element receives the surface SH waves, the transmittance time of the surface SH wave is measured. The sound elastic stress measuring method by the surface SH wave in the subject substance and the sensors used in this method are provided. COPYRIGHT: (C)2004,JPO
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