METHOD FOR MEASURING SPEED OF SURFACE WAVE, CREEPING WAVE AND TRANSVERSE WAVE, AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To perform a simultaneous measurement by emitting an ultrasonic impulse in Z-direction vertical to X, Y, and processing the received waveform data to calculate the speeds of surface wave, creeping wave and transverse wave propagating near the surface of a matter to be measured. ;SOLUTION: A support body 12 installed into a measuring head 11 opened in the lower end has a spherical recessed surface, and a focusing ultrasonic transducer formed of a piezoelectric element is connected to the recessed surface. A temperature sensor for detecting the temperature of water is fixed to the lower end of the head 11 in parallel to the support body 12. A thermometer 24 connected to the temperature sensor generates a temperature signal, and an A/D converter 25 inputs the temperature signal to a computer 30. A program group of physical property measurement is stored in the computer 30. An operator successively selects and designates programs of set of sensor vertical degree, read of waveform, sound velocity calculation and density, vertical elastic coefficient, and calculation of Poisson's ratio on the menu screen of a two-dimensional display 32.;COPYRIGHT: (C)1997,JPO