The Research And Development On Open-Channel Flow-Measuring System

The open-channel flowing refers to a kind of flowage which has the free surface. The open-channel flow-measuring system described in this paper is used for the measurement of the waste discharge in the city or from the factories. The flow-measuring system adopts the Khafagi flume as the first sense organ to realize the flow/head signal conversion. The head signal is picked up and converted into voltage signal by the buoy-level mechanism and the magnet-resistant angle measuring sensor. The intelligent measuring meter configured by SCM(Single Chip Microprocessor) system is to sample and process the voltage signal output by the sensor,calculate and display the value of instant flow and total flow. Furthermore,it can show the chargement according to the price of water set through the keyboard. This paper gives a comprehensive presentation about the fundamental of the flow-measuring method by flume,the design of Khafagi flume and the buoy-level mechanism,the signal conversion by the angle measuring sensor and the deduce of the flow equation. It also introduces the hardware design,the development and emulation on software of the intelligent measuring meter in detail. The error of flow measurement is analyzed and calculated in the end either.