Research On Correlation Ultrasonic Flowmeter Based On TMS320F2812

In the crude oil extraction process, in order to measure and dynamic management of reservoir, determine optimum point of production and the best time of oil extraction, we are asked frequently to monitor the dynamics of single well and control the output of oil. To direct at the current traditional measurement of single well, we design the correlation method ultrasonic flow meter based on TMS320F2812. As the ultrasonic wave in the liquid flow can be set on the information of the flow propagation velocity, therefore,by means of dealing with the received ultrasonic signal, we can acquire the corresponding fluid noise signal. Then by correlation method transforming flow velocity measurement problems to the time interval measurement problems when fluid through a certain distance of two sections, we can achieve the online measurement of non-contact flow rate.Digital signal processing technology has been rapid development in recent years, its theory and algorithms have also been widely used in various industries. There are many mathematics algorithms to achieve the correlation method. This paper uses the fast Fourier transform and fast Fourier inverse transform approaches to achieving correlation algorithm. With the development of digital signal processing technology, we develop DSP,a digital signal processor, meeting the requires of processing data in large, fast real-time processing, accuracy processing in digital signal processing technology. It provides a good software and hardware platform for Fast Fourier Transform. So this article uses DSP for Fast Fourier transform to achieve the single well-line measurement of oil flow.This paper studies the correlation method ultrasonic flowmeter system design and software and hardware implementation which are based on TMS320F2812. The complete measurement system consists of three modules:the first module is part of the signal generated, namely using 100KHz high frequency ultrasonic sensors to detect information of oil-water two-phase flow; the second module is part of the signal conditioning, including receiver, demodulation amplifier, low pass filter, signal amplifier and other analog circuits; the third module is part of the signal acquisition and processing. This module uses TI's TM320F2812 as the core component. Through these three modules eventually be able to accurately measure the flow rate of oil-water two-phase flow. The experiment testing of this device is measured above the single well. Analysis of the measurement results obtain the correlation ultrasonic flowmeter to be desinged in this text that based on TMS320F2812, and it meets on the basic measurement requirements in oil well.