Transmission line fiber grating stress sensor
A technology of stress sensor and optical fiber grating, which is applied in the measurement of the change force of the optical properties of the material when it is stressed, can solve the problems of inability to meet overhead transmission lines, difficulty in self-feeding, poor transmission capacity of monitoring equipment, etc.
Active Publication Date: 2014-12-17
ZHONGTIAN ELECTRIC POWER OPTICAL CABLES CO LTD
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Problems solved by technology
The current online monitoring equipment is difficult to self-supply on the overhead line, and the transmission capacity of the monitoring equipment is poor, and can only transmit ten kilometers, which cannot meet the requirements of the overhead transmission line.
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[0020] Refer to attached figure 1 , the fiber grating stress sensor for power transmission wire of the present invention comprises fiber grating 2, deformable body 7, lead-out optical cable 5 and optical cable lead-out port 8, and the two ends of deformable body 7 are flat rectangular parallelepiped, all have fittings installation hole 1 on flat rectangular parallelepiped; The middle part of the body 7 is a cylinder, an optical cable outlet port 8 is provided on the upper part of the deformation body 7, and a U-shaped groove 4 is opened at the center line of the deformation body 7; the fiber grating 2 is adhered in the U-shaped groove 4 in parallel, One end of the fiber Bragg grating 2 is adhered to the deformation body 7, and the other end is drawn out from the cable outlet port 8 through the outlet cable 5 for connecting the fiber Bragg grating 2 analysis equipment. When the deformation body 7 is elastically deformed, the fiber grating 2 is elastically deformed accordingly. ...
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Abstract
The invention relates to a transmission line stress sensor, in particular to a transmission overhead line fiber grating stress sensor which is used for online stress monitoring of transmission overhead lines. The transmission line fiber grating stress sensor comprises fiber gratings, a deformation body, a leading-out cable and a cable leading-out port, wherein both ends of the deformation body are flat cuboids, and the flat cuboids have fitting mounting holes; the middle part of the deformation body is cylindrical, the cable leading-out port is arranged at the upper part of the deformation body, and a U-shaped groove is arranged at the centerline of the deformation body; the fiber gratings are parallely adhered to the U-shaped groove, one end of each fiber grating is adhered to the deformation body, and the other end of the fiber grating is leaded out of the cable leading-out port through a leading-out cable to connect a fiber grating analysis device. The transmission line fiber grating stress sensor is a passive component and does not need power supply. Therefore, the problem of difficult online power supply is solved, and the requirements of long transmission overhead lines are completely met. Moreover, the encapsulation and the design of the fiber gratings are more favorable to connect transmission overhead lines.
Description
technical field [0001] The invention relates to a stress sensor for a power transmission wire, in particular to a fiber grating stress sensor for a power transmission overhead line, which is a sensor for on-line stress monitoring of a power transmission overhead line. Background technique [0002] Overhead transmission lines are affected by self-disturbance disasters such as icing and snowstorms, which are likely to cause accidents such as line disconnection, tower collapse, and insulator flashover, which have caused huge economic losses to the society. On-line stress monitoring of overhead transmission lines has always been a difficult problem for Zongduo Design and Research Institute. The current online monitoring equipment is difficult to self-supply on the overhead line, and the transmission capacity of the monitoring equipment is poor, and it can only transmit ten kilometers, which cannot meet the requirements of the overhead transmission line. Contents of the inventi...
Claims
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IPC IPC(8): G01L1/24
Inventor 栗鸣徐拥军缪春燕何仓平蔡飞飞
Owner ZHONGTIAN ELECTRIC POWER OPTICAL CABLES CO LTD