Acoustic-Doppler flow velocity measuring instrument and flow velocity measuring method

Abstract

The invention discloses an acoustic-Doppler flow velocity measuring instrument and a flow velocity measuring method. The acoustic-Doppler flow velocity measuring instrument comprises a transmitter module, a receiving module, a control circuit, a communication module and a single-chip microcomputer, wherein the input end of the transmitter module is connected with the corresponding output end of the single-chip microcomputer; the receiving module is in two-way connection with the single-chip microcomputer; the output end of the control circuit is connected with the corresponding input end of the single-chip microcomputer; the communication module is in two-way connection with the single-chip microcomputer. The flow velocity measuring method comprises the steps of emitting a measuring signal, receiving an underwater acoustic echo ultrasonic signal, performing selecting wave amplification on an underwater acoustic echo electric signal, estimating the Doppler frequency shift, and measuring the flow velocity. By adopting a 5MHz measuring signal, the Doppler frequency shift is calculated through a self-correlation algorithm and the flow velocity is measured, so that requirements for the water body particles are low, the measuring range is wider, and the precision is higher.

Description

technical field [0001] The invention relates to a flow velocity measuring instrument and a flow velocity measuring method, in particular to an acoustic Doppler flow velocity measuring instrument and a flow velocity measuring method, belonging to the technical field of underwater acoustic measuring instruments. Background technique [0002] Since the 1980s, my country's urban sewage treatment has made great progress in all aspects, but the situation is still extremely severe. my country's current fresh water resources are quite short, and my country's current water pollution situation is more serious, especially the impact of urban sewage discharge on surface water and groundwater quality is very prominent. [0003] However, due to the late start of sewage treatment in my country, the poor foundation and serious shortage of treatment facilities, the penetration rate of urban drainage pipe network and the collection rate of pipes are relatively low. The existing contact-type ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the late start of my country's sewage treatment, poor foundation, serious shortage of treatment facilities, urban drainage network penetration rate and pipeline collection rate are low

The existing contact-type water flow velocity measuring instruments include propeller type and rotary cup type according to the difference of water flow velocity sensors, which still have many problems such as low design level, low equipment quality, and poor operation stability.

Images