Development of a FBG Stress Sensor for Geostress Measurement Using RSR Method in Deep Soft Fractured Rock Mass
文献类型：期刊论文
| 作者 | Zhu, Yuanguang; Liu, Bin; Wang, Sheng; Yang, Zhanbiao |
| 刊名 | APPLIED SCIENCES-BASEL
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 12期号:4 |
| 关键词 | rheological stress recovery method deep rock mass rock stress stress sensor fiber Bragg grating |
| 英文摘要 | The rheological stress recovery (RSR) method was proposed to obtain measurements of in-situ stress. Rock stress can be evaluated by monitoring the recovery process of stress sensors embedded in rock mass. In order to achieve this application, a novel stress sensor employing the fiber Bragg grating (FBG) technique was designed and manufactured. This stress sensor consisted of three parts: A sensing spherical head, connecting rod, and coupler box. In the sensing spherical head, six independent pressure sensing units were assembled together with a temperature compensation unit. In addition, wavelength division multiplexing (WDM) technology was adopted to ensure that only one fiber splice for each stress sensor is output. The fiber splicing of the sensing units was assembled in the coupler box. The transformation equations from the six pressure sensing units to the stress sensor were established. Furthermore, a calibrating device for the stress sensor was designed, and the general calibration and long-term stability tests were carried out to investigate the characteristic indexes (maximum range, full-range output, and sensitivity) and measurement error (zero drift index, hysteresis index, and repeatability index). Measurement errors showed that the degrees of linearity, zero drift, hysteresis, and repeatability were all below 1.5%. The stability test indicated that the creep of the stress sensor can gradually stabilize in 24 days, and the errors were less than 1.5%. As a result, the stress sensor developed here satisfies the requirements for the RSR method and can be used in field. |
| 学科主题 | Chemistry ; Engineering ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000797329400001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34935]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Shandong University of Science & Technology 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; |
| 推荐引用方式 GB/T 7714 | Zhu, Yuanguang,Liu, Bin,Wang, Sheng,et al. Development of a FBG Stress Sensor for Geostress Measurement Using RSR Method in Deep Soft Fractured Rock Mass[J]. APPLIED SCIENCES-BASEL,2022,12(4). |
| APA | Zhu, Yuanguang,Liu, Bin,Wang, Sheng,&Yang, Zhanbiao.(2022).Development of a FBG Stress Sensor for Geostress Measurement Using RSR Method in Deep Soft Fractured Rock Mass.APPLIED SCIENCES-BASEL,12(4). |
| MLA | Zhu, Yuanguang,et al."Development of a FBG Stress Sensor for Geostress Measurement Using RSR Method in Deep Soft Fractured Rock Mass".APPLIED SCIENCES-BASEL 12.4(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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