Ultrasonic flowmeter and using method thereof

Abstract

The invention provides an ultrasonic flowmeter and a using method thereof, and belongs to the technical field of flowmeters. The ultrasonic flowmeter comprises a pipe body and fixing bases and is characterized in that moving wheels are arranged at the bottom of the pipe body, the fixing bases are installed on the periphery of the pipe body, and a rectifier is arranged at one end of the pipe body. The flow meter is controlled to move in a pipeline through the two sets of moving wheels, the flow meter is fixed to the inner wall through the fixing base, and the purpose of conveniently measuring the flow of fluid in multiple sections of pipelines is achieved; the asymmetry of a fluid flow field in the gas pipeline is weakened through the rectifier, vortex in fluid is reduced, and therefore the effect of improving the measurement precision of a transducer is achieved; by adopting a microprocessor with ultra-low power consumption, a wake-up and sleep time measuring unit, a temperature and pressure sensor and the like are controlled according to instructions, so that the effect of low power consumption of the flowmeter is achieved.

Description

technical field [0001] The invention relates to the technical field of flow meters, in particular to an ultrasonic flow meter and a use method thereof. Background technique [0002] The ultrasonic flowmeter is an instrument that measures the flow rate by detecting the effect of the fluid flow on the ultrasonic beam. The clamp-on or pipe-type ultrasonic flowmeter is based on the "velocity difference method" and measures the fluid flow in the circular tube. According to the signal detection The principle of ultrasonic flowmeter can be divided into time difference method, beam offset method, Doppler method, cross correlation method, spatial filtering method and noise method, etc. The time difference method compensates the error caused by the change of sound velocity with temperature in the flow velocity calculation. In recent years, most flowmeters at home and abroad adopt the principle of time difference method. [0003] The patent with the application number CN201920605398.X...

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Problems solved by technology

[0005] This technical solution is installed between two pipelines through a flange. When the fluid flow in the pipeline needs to be measured, the pipeline needs to be removed and the flowmeter installed between the two tracks. The operation is complicated; and the flow field of the fluid in the pipeline changes. It is due to the influence of curved pipes, rough wall conditions, pipe manufacturing processes, and installation angles of fluid flowing through elbows, valves, reducers, and transducers of ultrasonic flowmeters, resulting in eddy current angles and turbulence in the flow field, making the flow The flow velocity in the field section is uneven and asymmetric. This technical solution cannot accurately measure the fluid with uneven flow velocity and asymmetry.

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