底座式多普勒测流仪在渠道自动监测中的应用

Application of base type Doppler flow meter in channel flow automatic monitoring

为解决渠道流量在线实时监测问题,依据声学多普勒频移的物理原理,开发了底座式IQ渠道流量自动监测系统,实现了流量数据实时自动采集,并通过GPRS等信道传送到中心站。中心站可对数据进行分析、处理、存储、转录、发布以及远程实时查询流量、工作状态、时段水量等。以云南牛栏江-滇池补水工程输水线路末端站为例,介绍了系统的工作原理、安装测量过程,分析了其监测精度。结果表明,与美国SONTEK公司的M9走航式声学多普勒水流剖面仪相比,IQ系统的测量误差在±5%以内,最大误差为-6.71%,系统误差为-0.9%,满足相关规范要求。

To solve the problem of online channel flow monitoring, based on Doppler shift principle, base type IQ system for channel flow measurement was developed. The system realized real time on - line flow measurement and data transmission to cen- ter station through GPRS channel. The center station can analyze, process, store, copy, publish the measured data and inquiry real - time discharge, operation state and time - interval water quantity etc. Taking the terminal station of water supply project from Niulnanjiang River to Dianchi Lake as a case, this paper introduces the operation principle and installation - t process of the system and analyzes the measurement accuracy. The analysis results show that compared with traveling Doppler current meter developed by US SONTEK Company, the measurement error of the presented system is less than 5% , the maximum error is -6.71% , the systematic error is -0.9% , which can meet the requirements of correlated code.