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Dam safety sensing optic cable

A technology of sensing optical cable and sensing optical fiber, which is applied in the direction of fiber mechanical structure, etc., can solve the problems of no water blocking layer, failure of optical cable, poor resolution of dam crack leakage, etc.

Inactive Publication Date: 2008-08-13
SHANGHAI BOOM FIBER SENSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deficiencies and deficiencies of the sensing optical cable in the prior art in the application of dam safety monitoring are as follows: 1. There is no heating device, and the ability to distinguish leakage from dam cracks is poor; 2. There is no water blocking layer, and water easily penetrates into the optical cable Internally, the optical cable will fail over time; 3. There is a built-in sensing optical fiber, if the optical fiber is broken, the temperature data transmission will not be possible

Method used

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Experimental program
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Effect test

Embodiment 1

[0008] Embodiment 1: With reference to Fig. 1. In this embodiment, one sensing optical fiber is used, and the length of the two wires in the present invention is sufficient to form a certain (heating) internal resistance when an operating voltage is applied to both ends of the wires. The present invention can be laid (layer by layer) during the construction of the dam, and whether there is leakage inside the dam structure can be monitored by the present invention after the dam is completed. First, short-circuit one end of the two wires, then apply a working voltage (20-30V DC voltage) to the other end of the two wires, and make the two wires generate heat according to the internal resistance of the two wires, and at the same time make the present invention The temperature rises to a certain temperature, and then the power is cut off to transmit the heat data of the present invention to the terminal measuring instrument installed on the data processing host in the room for meas...

Embodiment 2

[0009] Embodiment 2: with reference to Fig. 2. In this embodiment, a sensing optical fiber and a reinforcing rib are added on the basis of Embodiment 1, and the reinforcing rib is arranged at the position of the sensing optical fiber in the first embodiment, and 2 sensing optical fibers are arranged on both sides of the reinforcing rib. When one of the sensing optical fibers fails or breaks, the safety monitoring of the dam can still be realized, and the compressive strength of the invention can be improved.

Embodiment 3

[0010] Embodiment 3: With reference to Fig. 3. In this embodiment, on the basis of embodiment 1, a water-blocking layer is filled between the reinforcing sleeve and the sheath, so that water vapor erosion can be prevented while realizing the safety monitoring function of the dam, and the service life of the present invention is prolonged. To achieve better implementation effect of the present invention.

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Abstract

The invention relates to a signal sensing medium, especially relates to a large dam safety sensing optical cable for real time monitoring large dam concrete solidification and large dam leakage status and elongating service life of the invented object. A filler layer, an intensifying sleeve, and a protective sleeve are wrapped on the sensing optical fibre sequentially. Two conducting wires are disposed in the filler layer. The invented safety sensing optical cable can not only real time monitor large dam concrete solidification status during large dam construction course, but also discover large dam leakage, so that flood damage is avoided, national possessions and mass safety are guaranteed, and the service life of the invented object is elongated.

Description

technical field [0001] The invention relates to a signal sensing medium, in particular to a dam safety sensing optical cable capable of rapidly monitoring dam concrete solidification and dam leakage in real time and prolonging the service life of the invention. Background technique [0002] Sensing optical cables can be used to monitor dam concrete solidification and dam leakage. During the construction of the dam, the sensing optical cable is pre-embedded in the dam, and the abnormal temperature generated by the abnormal condensation of the concrete during pouring is used to monitor the condensation of the dam concrete in real time; during the construction of the dam and after completion The temperature of the dam has been monitored for a long time. Since there is water flow where there is leakage in the dam, the heat loss is relatively fast, so that it is possible to monitor whether there is leakage in the dam. The sensing optical cable is used to monitor the above condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44
Inventor 周正仙
Owner SHANGHAI BOOM FIBER SENSING TECH
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