Application of the Microclamped Fiber Bragg Grating (FBG) Sensor in Rock Bolt Support Quality Monitoring
| Autor: | Yu Wei, Yang Tielun, Wang Zhenyu, Xinxin Guo, Bo Wang, Ma Zhenwang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Rock bolt
Bare fiber Materials science Article Subject Acoustics 010401 analytical chemistry 0211 other engineering and technologies 02 engineering and technology Engineering (General). Civil engineering (General) 01 natural sciences 0104 chemical sciences Wavelength Fiber Bragg grating Calibration Quality monitoring Sensitivity (control systems) Fbg sensor TA1-2040 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | Advances in Civil Engineering, Vol 2020 (2020) |
| ISSN: | 1687-8094 1687-8086 |
| Popis: | The force-measuring rock bolt instrumented with bare fiber Bragg grating (FBG) sensors are generally factory-fabricated. To enable users to fabricate a force-measuring rock bolt by themselves, the microclamped FBG sensor is proposed to replace the encapsulated bare FBG sensor. A theoretical formula of strain sensitivity is also established. The strain sensibility measured by indoor calibration is consistent with the theoretical one, indicating that the microclamped FBG sensor can measure strain accurately. Besides, the measured strain sensibility coefficient (wavelength difference/strain) matches the theoretical values, making the installed microclamped sensor free from the need for recalibration and proving the installation method to be reliable. Also, the test sensitivity can be adjusted as needed. The instrumented rock bolt with microclamped FBG sensors shows great mechanical performance in the field test, awaiting further usage in applications. |
| Databáze: | OpenAIRE |
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