An Overhead Conductor Weighing Sensor Based on Fiber Bragg Grating

Snow and ice disasters on power system safe and reliable operation of the transmission line has a great threaten.An overhead conductor tension sensor based on fiber Bragg grating is developed.The sensor contains a strain sensor module and a temperature compensation module which can offer temperature compensation for strain sensing module.The sensor connected to the tower and the insulator with metallic clamps.If there is ice on the transmission line,the tension of the sensor sensing module of the center wavelength will corresponding change,and the ice condition of the transmission wires can be reflected by the center wavelength variation.Experiment indicates that the tension sensitivity coefficient of the sensor is 9.8 pm/kN,the repeatability error is 1.78% FS,the nonlinear error is2.4% FS, the hysteresis is 1.5% FS.

Download Full-text

A Research on High-Precision Strain Measurement Based on FBG with Temperature Compensation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1083.121 ◽

2015 ◽

Vol 1083 ◽

pp. 121-126

Author(s):

Zi Wang ◽

Xiang Zhang ◽

Yue Gang Tan ◽

Tian Liang Li

Keyword(s):

Measurement Error ◽

Theoretical Calculation ◽

Fiber Bragg Grating ◽

Strain Measurement ◽

Temperature Compensation ◽

Differential Method ◽

Resistance Strain ◽

Strain Sensing ◽

Repeatability Error ◽

New Type

FBG (Fiber Bragg Grating) is a new type of optical passive device which can be used in sensing field. This paper demonstrates the feasibility and effectiveness of FBG as the new method of strain measurement, and improves the measuring precision. Based on the strain sensing property of FBG, the study adopts the differential method of double FBGs to make temperature compensation, and conduct the contrast experiment with resistance strain chip. The experimental results show that strain measurement based on FBG agrees well with theoretical calculation. The measurement error: no more than 1%, linear fitting correlation coefficient: almost 1, linearity: 0.17%, sensitivity: 7.92, hysteresis error: 0.347%, repeatability error: 0.333%. The results show FBG’s performance are superior to resistance strain chip, especially in aspect of measuring precision. Therefore, we can conclude that FBG is a feasible and effective method of strain measurement.

Download Full-text

Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing: A Survey

Photonic Sensors ◽

10.1007/s13320-018-0504-y ◽

2018 ◽

Vol 8 (4) ◽

pp. 320-331 ◽

Cited By ~ 11

Author(s):

Yi Kuang ◽

Yongxing Guo ◽

Li Xiong ◽

Wenlong Liu

Keyword(s):

Fiber Bragg Grating ◽

Temperature Compensation ◽

Bragg Grating ◽

Strain Sensing

Download Full-text

A Fiber Bragg Grating acceleration sensor with temperature compensation

Optik ◽

10.1016/j.ijleo.2021.166993 ◽

2021 ◽

pp. 166993

Author(s):

Xianfeng Zhao ◽

Zhen’an Jia ◽

Wei Fan ◽

Wangfei Liu ◽

Hong Gao ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Temperature Compensation ◽

Bragg Grating ◽

Acceleration Sensor

Download Full-text

Research on Temperature Compensation of the Fiber Bragg Grating Sensor and the Resistance Strain Gauge

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2021.3041 ◽

2021 ◽

Vol 16 (6) ◽

pp. 1020-1027

Author(s):

Feng Zhu ◽

Min Liu ◽

Chengjun Xu ◽

Sheng Zou ◽

Chentong Chen ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Strain Gauge ◽

Temperature Compensation ◽

Metal Structure ◽

Resistance Strain ◽

Fiber Bragg Grating Sensor ◽

Bragg Grating ◽

Resistance Strain Gauge ◽

Strain Monitoring ◽

Bragg Grating Sensor

The fiber Bragg grating sensor is widely used in strain monitoring of large metal structure and trend to replace the resistance strain gauge due to its advantages of strong stability, high measurement accuracy, multiple points measuring, strong environmental suitability and long transmission distance. The temperature-induced strain, which can have the same order of magnitudes as the mechanically-induced strain, will cause great errors in the strain monitoring. Therefore, the temperature compensation for the sensors is essential to guarantee the measurement accuracy. The existing theoretical models and experiment platforms for analyzing the temperature compensation are established by assuming that the testing temperature is constant. However, the surrounding temperature of some large metal structure is not stable, and the effect of temperature change cannot be neglected. This paper aims to establish an analytic model and an experiment platform to compare the temperature compensation of the fiber bragg grating sensor and the resistance strain gauge. The superiority of the temperature compensation for the fiber bragg grating sensor is verified. The result provides theoretical support for choosing the fiber bragg grating sensor in the long-time strain monitoring.

Download Full-text

Investigation on Temperature Compensation of Fiber Bragg Grating Sensors for Hull Monitoring

Volume 11B: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering ◽

10.1115/omae2018-77326 ◽

2018 ◽

Author(s):

Ruiqi Ma ◽

Guoqing Feng ◽

Huilong Ren ◽

Peng Fu ◽

Shuang Wu ◽

...

Keyword(s):

Thermal Expansion ◽

Fiber Bragg Grating ◽

Temperature Compensation ◽

Compensation Method ◽

Bragg Grating ◽

Theoretical Derivation ◽

Temperature Changes ◽

Hull Girder ◽

Fbg Sensor ◽

Fbg Sensors

Hull monitoring system with Fiber Bragg Grating (FBG) sensors increasingly receives people’s attentions. However, for the ship hull monitoring, the deformation of hull girder changes a lot as is subjected to a huge temperature variation. Therefore, the compensation method with only FBG temperature self-correction is not suitable for the hull monitoring sensors because no material thermal expansion effects are reasonably included. In this paper, the new compensation method of hull monitoring FBG sensor based on the sensor theory with both FBG temperature self-correction and steel thermal expansion effects correction is studied. The coupled compensation method suitable for hull monitoring sensor is obtained by theoretical derivation. As the comparison, the coupled compensation experiment was carried out. The results show that the relative error under the temperature compensation method is large in the case of drastic strain and temperature changes, and the correction results of the tested method will be closer to the true level.

Download Full-text