气体超声流量计在线诊断技术

Online Diagnostic Technology of Gas Ultrasonic Flowmeter

超声流量计计量系统包含超声流量计、温度变送器、压力变送器、色谱分析仪和流量计算机等标准设备,将计量系统中各标准设备的测量数据通过光纤等网络方式传输至控制中心,通过超声流量计的自诊断(包括增益值、信号质量、信噪比、流量分布、声速的诊断方法)和声速检验来完成流量计的在线诊断。目前该技术已经应用在西气东输管道、陕京输气管道和中亚管道等国内多条高压天然气长输管道,并取得了很好的使用效果。

Using the measurement data of each ultrasonic flowmeter measurement system standard equipment which consists of ultrasonic flow meter, temperature transmitters, pres-sure transmitters, chromatographic analyzer, flow computers and so on of the transmission through fiber or other network ways to the control center, complete the online diagnostic meter through the way of self- diagnosis （including gain, signal quality, signal to noise ra-tio, flow distribution, diagnostic the speed of sound） and speed of sound test. At present, the technology has been applied in many high pressure natural gas long-distance pipeline as the West- East Gas Pipeline, Shanxi- Beijing Gas Pipeline and the Central Asian pipeline and other domestic and so on,and all achieved good results.