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在进行各种物理实验和解决许多工程问题时,往往会遇到一些大振幅(大于光的波长)的机械振动的测量问题。这类测量实际上包括了涉及到振动试验仪器的校准和检定,整机、部件和机构的振动检验以及超声源和接收器的动态特性及强度特性的检验等绝大部分工
When conducting various physical experiments and solving many engineering problems, some large vibration amplitude (greater than the wavelength of light) is often encountered in the measurement of mechanical vibration. Such measurements actually involve the calibration and verification of the vibration test equipment, the vibration tests of the complete machine, components and mechanisms and the inspection of the dynamic characteristics and strength characteristics of the ultrasonic sources and receivers