Tests on Extraneous Water Monitoring in Drainage Networks Based on Distributed Optical Fiber Temperature Sensor
The extraneous water invasion has significant negative impacts on the drainage sewer system.The precise identification and location of extraneous water is essential for a better management of the pipeline network.Based on the full scale experiment platform,three parameters including the temperature difference,water level and extraneous water inflow ratio were tested to investigate the use of distributed fiber optic temperature sensing(DTS)for detecting extrane-ous water under different operating conditions and to assess the accuracy of the measurement results.The results show that the feasibility of DTS identification of extraneous water mainly relates to the water inflow ratio.The temperature difference primarily affects the temperature of the mixed water flow,while the water level mainly affects the response time.Overall,the positioning accuracy of DTS is 0.5 m and the fastest responsive time is less than ten seconds.For 12 group of test conditions,the relative error is less than 5%,and the standard error is less than 0.2℃.Therefore,the DTS performs good on detecting the extraneous water invasion.
万方数据
维普
