TIME-OF-FLIGHT METHOD OF DETERMINING SOUND SPEED IN LIQUID MEDIUM AND APPARATUS THEREFOR Russian patent published in 2014 - IPC G01H5/00 

FIELD: physics.

SUBSTANCE: procedure of measuring sound speed using a time-of-flight method includes setting a measurement base using a special measure of length in the form of a rectangular parallelepiped with two polished sound-reflecting surfaces. The rectangular parallelepiped is mounted vertically on an adjustable base of the working measurement volume bounded by a cover in the form of plane-parallel plate. Receiving/transmitting piezoelectric transducers are installed opposite the sound-reflecting face of the rectangular parallelepiped and the sound-reflecting base, said transducers being connected to an electric pulse generator and a time interval measuring device. The piezoelectric transducers are mounted on the outer surface of the plane-parallel plate, and adjustment elements are placed on the base, connected to the upper part of the device by squirrel wheel. The measurement procedure includes multiple reflection of sound pulses. Sound speed is estimated based on the time interval from the beginning of generation of sound pulses by the generator to the time of receiving the sound pulses, taking into account adjustment corrections.

EFFECT: increased accuracy of measuring sound speed.

2 cl, 4 dwg