Ultrasonic flow rate detection system

Abstract

An ultrasonic flow rate detection system comprises a system control part, a circuit part and an assistant device, wherein the system control part comprises a single chip, a digital signal processor, and an on-site programmable gate array; the circuit part comprises a switching circuit, an automatic gaining control amplifying circuit, an analog / digital converting circuit, and a digital / analog converting circuit; the assistant device comprises a storage part, an input device, a display device a power supply and an ultrasonic transducer; the on-site programmable gate array is connected with the input device and the ultrasonic transducer respectively, and used for receiving the input instruction of the input device and conducting time control on the ultrasonic transducer; the digital signal processor is connected with the storage part, and used for data information exchange; the on-site programmable gate array is in bi-directional connection with the single chip and the digital signal processor respectively; the single chip is connected with the display device, and used for displaying data information through the display device.

Description

technical field [0001] The invention relates to a water flow detection system in the fields of water conservancy, agriculture and the like, in particular to an ultrasonic flow detection system. Background technique [0002] Ultrasonic measurement of fluid flow is widely used in industrial engineering. In the production process of petroleum and chemical industries, ultrasonic detection is used to understand the total flow of oil collection; in large hydropower stations or dam stations, ultrasonic flowmeters will be installed for real-time Detect changes in water flow; and now thousands of households have their own water pipes and water meters, how to reasonably and accurately detect the water consumption of each user, so that water plants and users that produce tap water are not worried about the measurement of water flow is also the current A very practical problem that can be solved by ultrasonic flow measurement; from the detection of large river water flow to the detectio...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem in the prior art that the calculation of the flow velocity in the detection process contains sound velocity, which is greatly affected by the temperature, thus affecting the accuracy of the measurement; the receiving door is always open during the detection process, and various external interference signals It is easy to invade, which affects the stability of the measurement and has high requirements for measurement accuracy in ultrasonic flow detection. The medium flow rate is 1m / s, and the time difference is only a few tens of nanoseconds. To achieve nanosecond resolution , a technical problem that cannot be realized by existing detection methods, the present invention provides an ultrasonic flow detection system

Images