Microwave flow meter

Abstract

The invention discloses a microwave flow meter which comprises a microwave signal source, a microwave sensor, a signal preprocessing circuit and a signal processing circuit. In the invention, two receiving sensors respectively convert received signals into electrical signals; the two signals sequentially pass through a radio-frequency (RF) amplifying circuit, a demodulation circuit for demodulating low-frequency modulating signals, a low-pass filter (LPF) for filtering out high-frequency noise, and a low-frequency amplifying circuit; then the two signals are transferred to an analog-to-digital converter for analog-to-digital conversion, and the converted data is transferred to an upper computer; and finally, correlation algorithm processing is carried out on the two paths of received low-frequency noise signals so as to acquire the flow velocity, thereby acquiring the needed final data information such as flow quantity, accumulated flow quantity and the like. The microwave flow meter has the advantages of real-time property, high efficiency, high accuracy and the like.

Description

technical field [0001] The invention discloses a microwave flowmeter, which belongs to the manufacturing technical field of flow test devices according to the International Patent Classification (IPC), and can be used in energy (such as oil, natural gas), metallurgy, environmental protection, pulp and paper, ore, nuclear power, chemical industry, etc. Two-phase flow and multiphase flow in many industries are measured by microwave principle measurement method metering device. Background technique [0002] A flowmeter is an instrument that indicates the measured flow rate and / or the total amount of fluid within a selected time interval. The traditional flowmeter generally uses a contact type to measure the measured fluid. The disadvantage is that it is easy to corrode and the measurement accuracy is not high. Ultrasonic non-contact flowmeters can be divided into different types of ultrasonic flowmeters such as propagation velocity difference method, Doppler method, beam shift ...

AI Technical Summary

Problems solved by technology

[0002] A flowmeter is an instrument that indicates the measured flow rate and / or the total amount of fluid within a selected time interval. The traditional flowmeter generally uses a contact type to measure the measured fluid. The disadvantage is that it is easy to corrode and the measurement accuracy is not high. Ultrasonic non-contact flowmeters can be divided into different types of ultrasonic flowmeters such as propagation velocity difference method, Doppler method, beam shift method, noise method and correlation method according to different detection methods, but the above detection methods are: Certain limitations, such as the propagation time method can only be used for clean liquids and gases; while the Doppler method can only be used to measure liquids containing a certain amount of suspended particles and bubbles; the Doppler method has low measurement accuracy

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