Flowmeter acoustic sensor

Abstract

The invention discloses a flowmeter acoustic sensor and relates to the technical field of ocean current metering equipment. The flowmeter acoustic sensor comprises a first group of energy converters, a second group of energy converters, a third group of energy converters and a fourth group of energy converters. The energy converters can be electrified to respectively begin measuring. The energy converters in each group are concentrically aligned, each energy converter can emit CW ultrasonic pulse signals in water, measuring acoustic axes can be formed between energy converters in the same group, and each energy converter can simultaneously detect and receive CW ultrasonic pulse signals emitted by the energy converter in the same group and spread by media. The flowmeter acoustic sensor reduces sensitiveness on flow field disturbance and has high precision and accuracy.

Description

technical field [0001] The present invention relates to the technical field of flow velocity measurement equipment, and more specifically, to ocean current measurement equipment. Background technique [0002] With the deepening of ocean development and research, ocean current velocity parameters are important data objects of great concern to ocean physics and ocean climatology; at the same time, this parameter is also concerned and valued by military and national economic departments such as hydroacoustics, hydrology and water conservancy. There are many kinds of current velocity measuring instruments for measuring ocean current velocity parameters, including electromagnetic current meters, vortex current meters and Doppler current meters. [0003] The electromagnetic current meter adopts the electromagnetic flow velocity sensor, which is greatly affected by the conductivity of seawater, has high power consumption, and is not suitable for use in freshwater environments; the ...

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Problems solved by technology

[0003] The electromagnetic current meter adopts the electromagnetic flow velocity sensor, which is greatly affected by the conductivity of seawater, has high power consumption, and is not suitable for use in freshwater environments; the vortex flowmeter uses a mechanical rotor type flow velocity sensor, and the sensitivity of the rotor mechanical structure is low, especially It is not suitable for the measurement of ocean currents with low velocity, and is easily affected by marine organisms and pollutants

In addition, these two flow meters are only suitable for the measurement of one-dimensional flow velocity

[0004] The three-dimensional flow velocity measuring instruments are mainly Doppler flowmeter and comprehensive transit time flowmeter. The signal is weak, the measurement sensitivity is low and the accuracy is also affected, so the ultrasonic Doppler flow meter sensor is not suitable for flow velocity measurement in clear sea water

This structure has high requirements on the installation process and the processing of special-shaped molds. At the same time, the potting of the mold is complicated and the yield is low. The acoustic sensor part after potting has a large structural volume and has a great impact on the flow field, so it is not suitable. Measure higher water velocity

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