scholarly journals Insulator string leakage current-monitoring sensor based on fiber Bragg grating

2018 ◽  
Vol 26 (19) ◽  
pp. 24940 ◽  
Author(s):  
Zhehao Yan ◽  
Zhiguo Zhang ◽  
Luming Li ◽  
Tong Zhai ◽  
Renzhong Guo ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Leakage Current ◽  
Bragg Grating ◽  
Current Monitoring

The Study and Applications on Fiber Bragg Grating (FBG) Monitoring System for Deep and Large Deformed Soft Ground

2011 ◽  
Vol 261-263 ◽  
pp. 1341-1347
Author(s):  
Hong Zhang ◽  
You Ping Liu ◽  
Jian Hua Li ◽  
Mao Dong Xiong
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Long Range ◽  
Measurement Errors ◽  
Fiber Optic Sensor ◽  
Displacement Sensor ◽  
Bragg Grating ◽  
Soft Ground ◽  
Ground Settlement ◽  
Current Monitoring

The fiber Bragg grating (FBG) technology is studied based on the current monitoring status of the highway soft ground settlement, for instance, the low degree of automation, the unsatisfied accuracy of the device, the slow data transmission and the greater measurement errors. The limited measuring range and the difficult situations of the soft ground burying and installing of the fiber optic sensor still need to be addressed. This thesis has analyzed the development of the long range optical fiber displacement sensor as well as its burying techniques which are suitable for soft ground settlement monitoring. Both of them have been successfully applied to De Chang Highway D10 subject. The study also shows that the long range optical fiber displacement sensor is able to meet the requirements of the soft ground monitoring. And data can be accurately monitored by means of real-time or on-line continuously. This is of great significance in pushing forward the development of the fiber optical monitoring technology in the field.

scholarly journals Measurement of leakage current and tension based on fiber Bragg grating

2021 ◽  
Vol 29 (3) ◽  
pp. 3772
Author(s):  
Zhehao Yan ◽  
Zhiguo Zhang ◽  
Qin Mei ◽  
Rui Zhou ◽  
Tong Zhai
Keyword(s):  
Fiber Bragg Grating ◽  
Leakage Current ◽  
Bragg Grating

Insulator String Leakage Current Sensor Based on Fiber Bragg Grating

2018 ◽  
Author(s):  
Zhehao Yan ◽  
Zhiguo Zhang ◽  
Luming Li ◽  
Tong Zhai ◽  
Renzhong Guo ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Leakage Current ◽  
Current Sensor ◽  
Bragg Grating

scholarly journals Experimental Strain Measurement Approach Using Fiber Bragg Grating Sensors for Monitoring of Railway Switches and Crossings

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3639
Author(s):  
Abdelfateh Kerrouche ◽  
Taoufik Najeh ◽  
Pablo Jaen-Sola
Keyword(s):  
Fiber Bragg Grating ◽  
Experimental Tests ◽  
Cost Effective ◽  
Measuring Method ◽  
Bragg Grating ◽  
Railway Network ◽  
System Failures ◽  
Railway Infrastructure ◽  
Train Speed ◽  
And Control

Railway infrastructure plays a major role in providing the most cost-effective way to transport freight and passengers. The increase in train speed, traffic growth, heavier axles, and harsh environments make railway assets susceptible to degradation and failure. Railway switches and crossings (S&C) are a key element in any railway network, providing flexible traffic for trains to switch between tracks (through or turnout direction). S&C systems have complex structures, with many components, such as crossing parts, frogs, switchblades, and point machines. Many technologies (e.g., electrical, mechanical, and electronic devices) are used to operate and control S&C. These S&C systems are subject to failures and malfunctions that can cause delays, traffic disruptions, and even deadly accidents. Suitable field-based monitoring techniques to deal with fault detection in railway S&C systems are sought after. Wear is the major cause of S&C system failures. A novel measuring method to monitor excessive wear on the frog, as part of S&C, based on fiber Bragg grating (FBG) optical fiber sensors, is discussed in this paper. The developed solution is based on FBG sensors measuring the strain profile of the frog of S&C to determine wear size. A numerical model of a 3D prototype was developed through the finite element method, to define loading testing conditions, as well as for comparison with experimental tests. The sensors were examined under periodic and controlled loading tests. Results of this pilot study, based on simulation and laboratory tests, have shown a correlation for the static load. It was shown that the results of the experimental and the numerical studies were in good agreement.

A Fiber Bragg Grating acceleration sensor with temperature compensation

Optik ◽  
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
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