Drainage pipe network leakage monitoring equipment based on distributed optical fiber temperature measurement

Abstract

The invention discloses drainage pipe network leakage monitoring equipment based on distributed optical fiber temperature measurement. The drainage pipe network leakage monitoring equipment comprisesa temperature sensing optical cable and a monitoring main machine which are connected with each other, wherein the monitoring main machine comprises a laser source and a processing module, and the temperature sensing optical cable is laid in a drainage pipeline and generates a reflected light sensing signal for laser of the laser source; 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 a leakage point exists or not, and positions the leakage position when the leakage point exists. According to the drainage pipe network leakage monitoring equipment based on distributed optical fiber temperature measurement, compared with the prior art, the leakage point is monitored based on temperature signals of the temperature sensing optical cable, so that the leakage of a whole drainage pipe network is monitored, and the leakage condition of the drainage pipe network is monitored in real time and in a large-range coverage manner.

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...

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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.

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