| 摘要 |
FIELD: measurement equipment.SUBSTANCE: ultrasonic signal is radiated, a response signal is received, the time interval is measured between the radiated and the received signals, and the distance is detected to the reflecting surface by multiplication of the speed of ultrasound propagation in controlled medium by the measured time interval. Radiation, reception of ultrasonic signals and measurement of time intervals between radiated and received ultrasonic signals is carried out on two frequencies with different periods, then these time intervals are compared, and corrected in accordance with the present mathematical expression.EFFECT: provision of the possibility to reduce error and increase stability of measurements in waveguide distribution of ultrasonic oscillations.2 dwg |
