The invention discloses an
ultrasonic Doppler flow direction and flow rate instrument which consists of a probe, a cable and a water surface host. The probe is connected with the water surface host through the cable to transmit an
underwater signal to the water surface host. The probe comprises two transducers, a
pipe body, a flow guide head, a
tail wing, a rotary hanging rotor connector and a circuit board; the flow guide head is fixed at the front end of the
pipe body; the
tail wing is fixed at the rear end of the
pipe body, so that a
closed space is formed in an inner cavity of the pipe body; the lower end of the rotary hanging rotor connector is hinged to the top surface of the pipe body; two transducers are slantingly mounted at both sides of the front end of the pipe body; an included angle theta is formed between the longitudinal axis of each
transducer and the longitudinal axis of the pipe body; the circuit board is mounted in the pipe body. The
ultrasonic Doppler flow direction and flow rate instrument is provided with a pair of transducers arranged left and right at the front part of the pipe body of the probe and each of the transducers forms a certain included angle with the pipe body, ultrasonic
waves are adopted to detect the flow rate and a
measurement point is positioned at the front part of a
machine body of the instrument, and thus, a flow field is not damaged and flow rate sampled data is accurate.