| 摘要 |
The invention relates to instrumentation technology and can be used in ultrasonic nondestructive inspection of materials, structures and objects for the determination of phase velocity of ultrasonic vibrations. A method for measuring phase time of radio pulse signal transmission involves discretization of measured signal, conversion thereof to digital code and calculation of radio pulse signal transmission time. Sent-out radio wave frequency, duration and sending period are generated from the same generator of signals of analog-digital converter discretization frequency and ROM reading signal frequency, wherein codes of reference signal sine and cosine values are stored. The invention makes it possible to determine phase time of ultrasound signal delay. |
