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Optical fiber-based digital sensor and monitoring method for wind vibration monitoring of power transmission lines

A digital sensor and vibration monitoring technology, used in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as poor frequency response effect and temperature sensitivity, achieve reliable work, low price, and solve the problem of being vulnerable to electromagnetic fields. the effect of interference

Active Publication Date: 2016-05-25
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a digital sensor for wind vibration monitoring of power transmission wires based on optical fiber, which solves the problems of poor frequency response and sensitivity to temperature in the existing cantilever beam type wind vibration monitoring sensors

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  • Optical fiber-based digital sensor and monitoring method for wind vibration monitoring of power transmission lines
  • Optical fiber-based digital sensor and monitoring method for wind vibration monitoring of power transmission lines
  • Optical fiber-based digital sensor and monitoring method for wind vibration monitoring of power transmission lines

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Embodiment Construction

[0051] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] Once the optical fiber is subjected to mechanical stress, the length of the optical fiber and the refractive index of the optical fiber core will change, and these changes will cause the phase in the optical fiber to change. The digital sensor for monitoring the breeze vibration of the power transmission line of the present invention is based on the force generated by the optical fiber. The relationship between the strain and the phase change is used to indirectly measure the amplitude value and frequency of the breeze vibration of the transmission line.

[0053] The digital sensor for wind vibration monitoring of power transmission line based on optical fiber of the present invention has a structure such as figure 1 As shown, the MCU operation control unit 5 is included, and the MCU operation control unit 5 is connected to the power s...

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Abstract

The invention relates to an optical fiber-based power transmission line aeolian vibration monitoring digital sensor which comprises an MCU (microprogrammed control unit) computing control unit, wherein the MCU computing control unit is respectively connected with a power supply module and a light sensation module by wires and is sequentially connected with a Zigbee communication module and an upper computer by a Zigbee network. The invention also discloses a monitoring method of the sensor; the method comprises the steps of mounting the power transmission line aeolian vibration monitoring digital sensor on a power transmission line; initializing by the MCU computing control unit, and sequentially performing data acquisition and data processing and outputting an optical fiber phase change electrical signal by the light sensation module; transmitting the optical fiber phase change electrical signal to the MCU computing control unit to obtain an amplitude value and frequency; sending the amplitude value and the frequency to the upper computer by the Zigbee wireless communication module. The sensor disclosed by the invention solves the problems that the existing cantilever beam type aeolian vibration monitoring sensor is poor in frequency response effect and is relatively sensitive to temperature.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring equipment for power transmission lines, and specifically relates to a digital sensor for monitoring breeze vibration of a power transmission wire based on an optical fiber. The invention also relates to a monitoring method for the digital sensor for monitoring breeze vibration of a power transmission wire. Background technique [0002] The wind vibration detection standard stipulated by the Institute of Electrical and Electronics Engineers (IEEE) adopts the bending amplitude method, and the current "Technical Guidelines for On-line Breeze Vibration Monitoring System of Overhead Transmission Lines" in China also uses this method for monitoring. The vibrometers used in this detection method all use cantilever beam sensors, mainly to measure the bending range of the transmission wire. Generally, the cantilever beam sensor is installed at the 89mm outlet of the wire clip to monitor the defor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00
Inventor 黄新波张亚维王玉鑫李自清
Owner XI'AN POLYTECHNIC UNIVERSITY
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