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

A technology of acoustic Doppler and flow velocity measurement, which is applied in fluid velocity measurement, velocity/acceleration/shock measurement, measuring devices, etc. It can solve the problems of low equipment quality, low design level, poor operation stability, etc., and achieve high measurement accuracy , wide measurement range, good real-time effect

Inactive Publication Date: 2015-08-26
王三名
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1:

[0048] like figure 1 As shown, an acoustic Doppler flow velocity measuring instrument includes a transmitting module, a receiving module, a control circuit, a communication module, and a single-chip microcomputer; the input terminal of the transmitting module is connected to the corresponding output terminal of the single-chip microcomputer, and the receiving module and the The single-chip microcomputer is bidirectionally connected; the output terminal of the control circuit is connected to the corresponding input terminal of the single-chip microcomputer; the communication module is bidirectionally connected to the single-chip microcomputer.

[0049] The single chip microcomputer is STM32F407.

[0050] like figure 2 As shown, the transmitting module is composed of a level conversion circuit, an H-bridge driving circuit, an energy storage circuit and a transmitting transducer; The H-bridge drive circuit is connected to the input end of the transducer ci...

Example Embodiment

[0058] Example 2:

[0059] like Figure 4 Shown, a kind of flow velocity measuring method of the acoustic Doppler velocity measuring instrument described in application embodiment 1, comprises the following steps:

[0060] Step 1: Transmitting a measurement signal: the transmitting module transmits a 5MHz ultrasonic measurement signal;

[0061] Step 2: receiving the underwater acoustic echo ultrasonic signal: the receiving module receives the underwater acoustic echo ultrasonic signal and converts it into an underwater acoustic echo electrical signal;

[0062] Step 3: frequency-selective amplification of the underwater acoustic echo electrical signal: the receiving module frequency-selectively amplifies the underwater acoustic echo electrical signal with a center frequency of 5 MHz, and outputs it to the single-chip microcomputer; the built-in sampling module of the single-chip microcomputer The discretized acquisition signal is:

[0063] X(nτ)=R(nτ)+jI(nτ) (1)

[0064] Or...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01P5/24
Inventor 王三名范寒柏袁野万福海苑文
Owner 王三名
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