A Drainage Network Leakage Monitoring Equipment Based on Distributed Optical Fiber Temperature Measurement

Abstract

The invention relates to a drainage pipe network leakage monitoring device based on distributed optical fiber temperature measurement, which includes a temperature-sensing optical cable and a monitoring host connected to each other. The monitoring host includes a laser source and a processing module, a temperature-sensing optical cable, and is laid in the drainage pipe. The laser light from the laser source generates a reflected light sensing signal, and the processing module obtains the temperature of each point along the temperature-sensing optical cable based on the reflected light sensing signal, judges whether there is a leak point, and locates the leak position if there is a leak point. Compared with the prior art, the present invention realizes the monitoring of the leakage point based on the temperature signal of the temperature-sensing optical cable, and further realizes the leakage monitoring of the entire drainage pipe network, and realizes the wide-area coverage and real-time monitoring of the leakage of the drainage pipe network.

Description

technical field [0001] The invention relates to a leakage monitoring device, in particular to a drainage pipe network leakage monitoring device based on distributed optical fiber temperature measurement. Background technique [0002] The urban drainage pipe network system is used to discharge urban domestic sewage, rainwater and industrial sewage. The monitoring and maintenance of urban sewage pipe network is an important link in the management and operation of urban water environment and water safety. With the increase of the service life and the heavy pressure of the road load, some urban drainage pipes began to have problems such as damage, deformation, sedimentation, and collapse, resulting in functional and structural defects in the drainage pipe network. In areas with high groundwater levels, a large amount of groundwater seeps into the sewage pipe network from damaged pipes, which greatly increases the amount of sewage and reduces the concentration of sewage water qu...

AI Technical Summary

Problems solved by technology

However, the former selects monitoring points along the underground sewage pipes to bury or penetrate resistivity probe rods, and uses software control to generate an automatic alarm when a leak occurs.

Images