An Ultrasonic Flowmeter Based on Micro-channel

Abstract

The invention discloses an ultrasonic flowmeter based on a micro-channel, belonging to the technical field of fluid flow measurement. The device of the present invention includes a pipeline chamber, a micro-channel assembly, an ultrasonic transducer, and an information collection and processing module; the pipeline chamber includes a feed chamber and a discharge chamber; the number of the micro-channels is multiple and linearly symmetrical Arranged and welded on the micro-channel base; the number of ultrasonic transducers is half of the number of micro-channels, and the same pair of ultrasonic transducers are respectively located at the upstream and downstream positions of the micro-channels, at the same On the axis and the transducer heads are opposite to each other. The information collection and processing module includes an information collection and signal processing module, the information collection module includes temperature and pressure sensors, and an ultrasonic transducer, and the information processing module is mainly a single-chip microcomputer and an LED display. The device of the invention detects the fluid flow in the vertical direction, has simple structure, convenient installation, wide applicability and high detection precision.

Description

technical field [0001] The invention belongs to the technical field of fluid flow measurement, and in particular relates to an ultrasonic flowmeter based on a microchannel. Background technique [0002] An ultrasonic flowmeter is a device that uses the action of a fluid on sound waves to measure the flow rate of a fluid. After the ultrasonic wave is incident on the outer wall of the pipe, when it propagates through the fluid, it is affected by some factors such as the fluid velocity and the diameter of the pipe, and shows special property changes. After the analysis and utilization of these characteristics, the flow rate of the fluid in the pipeline can be calculated. Ultrasonic flowmeter has the characteristics of non-contact measurement, high cost performance, strong adaptability, high sensitivity, convenient installation and long service life. In recent years, ultrasonic flowmeters have been widely used in petroleum, chemical, hydropower and other industrial fields. ...

AI Technical Summary

Problems solved by technology

In recent years, many researchers have improved the ultrasonic flowmeter. For example, the ultrasonic flowmeter of Chinese patent application CN110285861A improves the fluid chamber on the basis of the traditional ultrasonic flowmeter, and gradually compresses the circular pipe into a rectangular pipe. Reduce the fluid flow area, although the device improves the detection accuracy to a certain extent, but the device has only one detection unit, which cannot realize large flow detection

Another example is the ultrasonic flowmeter of Chinese patent application CN108934177A, which simplifies the traditional ultrasonic flowmeter and completes the measurement of fluid flow with a simpler structure, but the flowmeter is prone to uneven distribution of fluid inside the pipeline, and gas-liquid two-phase coexistence in the pipeline In addition, the diameter of the measuring pipe used in the ultrasonic measurement of this patent is relatively large, and the ultrasonic stroke is long, which is easy to cause signal attenuation and measurement error

[0004] Existing ultrasonic flowmeters have problems such as difficulty in ensuring accuracy, long-stroke acoustic signal attenuation, difficult disassembly and cleaning of detection devices, few detection units and low efficiency. Therefore, it is urgent to design better adaptability and detection accuracy for fluid flow high ultrasonic flowmeter

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