Manhole cover monitoring system and method based on optical fiber sensing

Abstract

The invention discloses a manhole cover monitoring system and method based on optical fiber sensing. The manhole cover monitoring system comprises detection optical fibers, signal demodulation analysis equipment, state comprehensive analysis equipment and graphical interface display equipment, wherein the detection optical fibers comprise a plurality of optical fibers which enable a plurality of manhole covers to constitute a manhole cover monitoring network; the signal demodulation analysis equipment is connected with the detection optical fibers; the state comprehensive analysis equipment is connected with the signal demodulation analysis equipment; the graphical interface display equipment is connected with the state comprehensive analysis equipment. The manhole cover monitoring system has larger manhole cover detection range and higher positioning accuracy, and the monitoring performance is not affected by external environmental factors.

Description

technical field [0001] The invention relates to manhole cover detection, in particular to a manhole cover monitoring system and method based on optical fiber sensing. Background technique [0002] With the development of the city, the number of underground manhole covers in the city is increasing. The existence of manhole covers facilitates the maintenance of underground sewage pipes by the staff, and facilitates the dredging of the congestion of underground pipes by the staff. But it also brought some adverse effects. Because the manhole cover itself has a certain value, the manhole cover is prone to being stolen, resulting in various traffic conditions, and pedestrians often accidentally fall into the "well" because of the lack of manhole cover. The national economy and the life safety of citizens have brought great losses. At present, incidents of manhole cover loss or damage mostly rely on manual inspections and complaints from citizens. After the manhole cover is lost,...

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Problems solved by technology

Patents (CN 103778404 A, CN201210472719, CN201310368793, CN201410014727, CN201410441597, CN201410778131, CN201410778472, CN201420419008) involved in the comparison network but the actual manhole cover positioning sensor and wireless manhole cover monitoring system communication is mainly realized by electric group Harsh, such as large temperature difference, oil and water vapor, etc., difficulty in on-site power supply, poor environmental adaptability, regular inspections and maintenance costs are high; in order to solve the above problems, the present invention provides a manhole cover based on optical fiber sensing Monitoring system, which is a passive sensor system, has the characteristics of easy networking, accurate positioning, less maintenance, strong environmental adaptability, etc., and has strong practical application value

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