Well lid monitoring system and method based on optical cable vibration conduction

Abstract

The invention provides a well lid monitoring system and method based on optical cable vibration conduction. The system comprises a vibration device, a sensing optical cable, a stress monitoring device, a data processing unit, a server and a control terminal. The well lid to be measured is connected with the sensing optical cable through the vibration device. The sensing optical cable is connectedwith the stress monitoring device, the stress monitoring device is connected with the data processing unit, the data processing unit is connected with the server, and the server is in communication connection with the control terminal. The vibration device is used for transmitting a vibration signal to the sensing optical cable when the well lid to be detected is opened. The stress monitoring device is used for collecting optical signals in the sensing optical cable and converting the optical signals into characteristic data, and the data processing unit is used for conducting time-frequency domain analysis on the characteristic data and judging whether the well lid is opened or not according to whether frequency domain characteristics are matched with the designed characteristic frequencyof the system or not. An existing optical cable is used as a sensor instead of directly installing a sensor on a well lid, existing resources are effectively utilized for monitoring, and the management efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of well cover monitoring, in particular to a well cover monitoring system and method based on optical cable vibration conduction. Background technique [0002] The speed of urban expansion is very fast, but at the same time, the level of urban management and services is obviously lagging behind. Urban management involves all aspects. Manhole covers are an important infrastructure in modern cities. However, manhole covers are frequently stolen or damaged on urban roads and cannot be repaired in time, which brings great safety hazards to passing pedestrians and vehicles. [0003] At present, a large number of manhole covers lack effective real-time monitoring means, and manual inspection is costly and inefficient. Therefore, in order to ensure the safety of personnel and public facilities, it is urgent to strengthen the management of inspection well covers for urban road inspection wells. However, due to the...

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Problems solved by technology

[0005] In order to solve the problem of untimely manual inspection and difficult management, the present invention proposes a manhole cover monitoring system and method based on optical cable vibration conduction, which connects the manhole cover to the optical cable, receives the optical signal returned from the optical cable through the stress monitoring device, and passes through the stress analysis equipment. Analysis and calculation of the data processing unit to realize the automatic monitoring of the opening state of the manhole cover

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