Buried pipeline leakage on-line monitoring system and monitoring method

Abstract

The invention relates to a buried pipeline leakage on-line monitoring system and monitoring method. In the system, N buried pipeline leakage on-line monitoring devices are parallelly located in a slave station, at least one commercial signal transmission module 4G / 5G server end is located in a master station, the slave station is in wireless communication with the master station, the commercial signal transmission module 4G / 5G server end is connected with a commercial server, narrow-strip piezoelectric wafers of the on-line monitoring devices are installed on the near end faces of strip-shapedwaveguide rods, and ultrasonic signal transmitting / receiving modules are connected with the narrow-strip piezoelectric wafers through positive wires and negative wires; the ultrasonic signal transmitting / receiving modules, signal conditioning modules, signal sampling modules and microcontroller modules are integrated on circuit boards, and the ultrasonic signal transmitting / receiving modules, thesignal conditioning modules and the signal sampling modules are controlled by the microcontroller modules; and the far end faces of the strip-shaped waveguide rods extend out of shells and are inserted into soil around pipelines. According to the system and the method, during leakage monitoring, signals generated by the monitoring devices are transmitted to the commercial server, and a data processing module installed in the commercial server compares changes of the signals so as to judge the leakage degree of the pipelines.

Description

technical field [0001] The invention relates to an online monitoring system and monitoring method for buried pipeline leakage, in particular to an online monitoring system and judgment for leakage of buried water pipelines and oil pipelines, and belongs to the field of structural health monitoring in the fields of petrochemical, urban public and other pipelines. This method is suitable for long-distance and large-area online long-term monitoring of buried pipeline leakage, or for non-buried pipelines, but pipeline leakage can cause changes in the viscous properties of the surrounding environment. Background technique [0002] Buried pipelines are widely used in petrochemical, urban public and other fields. Buried pipelines with a length of tens of thousands of kilometers will inevitably suffer from load shocks, earthquakes, aging, and accidental external damage. These factors are the main causes of leakage. The leakage of buried pipelines is difficult to locate and monitor, ...

AI Technical Summary

Problems solved by technology

This technology cannot meet the rapid detection of large-scale pipelines; KP 1020170005401 announced a continuous leak location detection system, which transmits the acoustic signal of water supply pipeline leakage from the ground through the wireless network, and uses the acoustic information to analyze the operation terminal to judge the possibility of water leakage

This method effectively reduces the workload of inspectors and increases the monitoring range, but the patent still judges water leakage based on acoustic signals and cannot eliminate the interference of environmental noise; JP2018013407 discloses a water leakage detection system, which is based on water leakage detection The principle of short circuit caused by water leakage around the meter and the detection belt works to detect the possibility of water pipe leakage

This method is more suitable for leakage detection of water pipelines with relatively clear leakage locations, but it cannot monitor pipelines with unclear leakage locations; CN201510166892.7 discloses an oil leakage detection device and method for oil pipelines, which utilizes leaks and blockages in oil pipelines Compared with the negative pressure wave method, this method has no substantial improvement, and also has poor positioning accuracy, which can easily lead to false alarms; JP2017145036 announced a double The shell leak detection system and the double-shell structure of the underground tank. When the system is monitored, two layers of pipes and multiple leak detection sensors are used to form a leak detection device at the site to be monitored, and a Wi-Fi control alarm system is built to notify the oil leakage information in time. Relevant personnel, the structure of the device is complicated, there are many equipments, and it is not suitable for pipelines where the leakage location is not clear

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