An accurate flow acquisition device and method
A flow acquisition and accurate technology, applied in the direction of volume/mass flow generated by mechanical effects, dynamic effects by detecting fluid flow, etc., can solve the problems of large fluctuation interference and low accuracy, achieve low calculation requirements and improve measurement accuracy , good inhibitory effect
Active Publication Date: 2022-02-11
CIVIL AVIATION FLIGHT UNIV OF CHINA
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Problems solved by technology
[0003] The technical problem of the present invention is to overcome the deficiencies of the prior art, provide a precise flow acquisition device and method, use the method of fusing the feedback data of the flow sensor and the liquid level sensor and design the Kalman filter signal processing algorithm for data fusion, and solve the current flow problem Common problems in working condition measurement, such as low precision and large interference by fluctuations, etc.
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[0051] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0052] Such as figure 1 As shown, this figure is a structural diagram of a flow acquisition system. The present invention mainly includes a water storage tank 1, a DC brushless motor centrifugally driven pump 2, a flow sensor 3 that generates a digital signal, and a liquid level sensor 4 that generates an analog signal. The signal obtained by the sensor is processed and fused, and the start-up and control module 5 realized by generating electrical signals through the control of the AVR single-chip microcomputer, and the data processing module 6 using Kalman filtering.
[0053] The DC brushless motor drives the pump 2, which is used to control the flow rate of the fluid to simulate the flow conditions under different working conditions. into motor control. By adjusting the duty ratio of pulse width modulation (Pulse Width Modulation, PWM) to adjust t...
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The invention is an accurate flow acquisition device and method, which is composed of a water storage tank, a DC motor-driven pump, a flow sensor for generating digital signals, a liquid level sensor for generating analog signals, a start-up and control mechanism, and a PC-side data processing module. The water storage tank simulates the volume of the actual storage liquid container, the DC motor drives the pump to change the real-time flow, the flow sensor is used to obtain the real-time liquid flow, the liquid level sensor is used to measure the absolute volume of the liquid in the container, and the start-up and control mechanism is through the AVR microcontroller Output PWM signal to control the speed of the pump, obtain sensor signals and output measurement parameters, the data processing module processes the signals collected by the sensors, uses multi-sensor feedback data and designs Kalman filter signal processing algorithms for data fusion, and realizes accurate flow measurement . Compared with the traditional flow measurement method, this device has the advantages of high precision, accurate real-time measurement, simple algorithm and small amount of calculation.
Description
technical field [0001] The invention relates to a precise flow acquisition device and method, which are used in various fields such as oil quantity acquisition and automatic spraying. Background technique [0002] Today, with the rapid development of electronic control systems, precise flow devices are widely used in many fields such as aircraft, automobiles and agricultural production. With the continuous development of economy and society, more and more fields put forward more demands on precise flow devices. In research on metrology systems, in sensors and their data fusion. Bai Wenhao’s liquid level monitoring experiment [1] ([1] Bai Wenhao. Multi-sensor fusion algorithm for the time-delay effect of liquid level monitoring [D]. Chang’an University, 2017.) The basis for the analysis of liquid level monitoring technology at home and abroad In terms of measurement accuracy, reliability, cost, and ease of installation, various liquid level monitoring technologies were comp...
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IPC IPC(8): G01F1/28
CPCG01F1/28
Inventor 安斯奇吕东晓陈思成徐星辰曽钰峻王玥峰
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA