The invention discloses an
acoustic wave ranging method and device, and relates to the technical field of measurement. The problems of poor
measurement reliability and
wind speed influence, which arecaused by echo loss and channel interference and the problem of
ranging error caused by trigger phase shift caused by echo fluctuations in the existing
acoustic wave ranging technology are overcome. According to the technology, a transmitting end sends encoded acoustic
waves in a detection frame encoding format and starts effective measuring wave counting; a receiving end is in an
acoustic wave receiving state after receiving a
pilot code; after a frame start
delimiter is detected, effective measuring wave counting is started; when a first effective measuring wave is received, a level
handshake signal is sent to the transmitting end; after receiving the level
handshake signal, the transmitting end sends a frame end
delimiter, stops counting, and counts and transmits the number of the effective measuring
waves; after receiving the frame end
delimiter, the receiving end counts the number of actually received effective measuring
waves; and if two numbers are equal, distance is calculatedbased on the relationship between the counted number of the effective measuring waves and the
wavelength.