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Semantic Scholar extracted view of "Research on new FBG soil pressure sensor and its application in engineering" by Ren Gaofeng et al. ... It is difficult to monitor the collapse position of a gas extraction borehole in a coal seam. In order to solve this problem, a fiber-optic grating collapse monitoring technology was proposed. Five ...
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DOI: 10.1016/J.IJLEO.2018.09.117 Corpus ID: 116379602; Research on new FBG displacement sensor and its application in Beijing Daxing Airport project @article{Junlin2019ResearchON, title={Research on new FBG displacement sensor and its application in Beijing Daxing Airport project}, author={Lv Junlin and Hu Zhongchun …
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Fibers can be inserted in hypodermic needles or catheters. That allows for more precise positioning of the fiber optic sensors. Moreover, fiber Bragg grating sensors are applied for temperature profiling near patients' internal organs. And finally, FBG sensors are produced for endoscopic/colonoscopic pressure profiling.
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Research Article Application of a FBG-Based Instrumented Rock Bolt in a TBM-Excavated Coal Mine Roadway Bin Tang,1,2,3 Hua Cheng,1 Yongzhi Tang,4 Zhishu Yao,1 Chuanxin Rong,1 Weipei Xue,1,3,5 and Jian Lin1 1School of Civil Engineering and Architecture, Anhui University of Science and Technology, 168 Taifeng …
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shibang / sbm fbg sensor for coal min.... 27 KiB Raw Permalink Blame History Unescape Escape Permalink Blame History Unescape Escape
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Fbg Sensor For Coal Mind Application Mining Machinery FBG strain sensors reflects the changes in the strain of the concrete wall. A group of micro-seismic data are illustrated in the aspect of energy, length of time of the signal, and frequency. The results show the FBG sensors can be used in coal mines for coal mines safety.
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One of the essential parts of a wind power generator that captures wind energy is the wind turbine blade. The safety of the blades rapidly declines as a wind turbine's operating period grows. For real-time monitoring, a chip-type pre-stressed fiber Bragg grating (FBG) strain sensor was fabricated. The sensor's structure was …
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A high-resolution FBG sensor is proposed for crust deformation observation and earthquake monitoring. A narrow-linewidth tunable fiber laser is used to interrogate the FBG. The wavelength shift of the FBGs due to seismic signal is measured by swept optical suppressed carrier single sideband (SSB-SC) interrogation technique with a reference …
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In this paper, a high-sensitivity fiber Bragg grating (FBG) tilt sensor using a cantilever-based structure is introduced. Two FBGs are fixed on a specially designed elastomer. One end of the elastomer is connected to the mass block, and the other end is connected to the shell. The principle of the tilt sensor is introduced in detail, and the …
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Sensors play a large role in monitoring and ensuring that environmental parameters satisfy industrial requirements. They offer crucial safety measures in the early detection of hazards. Conventional electrical sensors possess several drawbacks that hinder their use in environmental sensing. Research has explored and optimized optical …
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This is a qualitative measure application of FBG sensor. The FBG neednt be calibrated to 'be used in heart rate detection. The FBG center wavelength of heart rate sensor is 1555nm. 3.3. The detection of posture The posture detection is very important to the rescue staffs who work in the special environment. The road of coal mine is uneven.
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In the mining field, Liang Minfu proposed an FBG inclination sensor to monitor the attitude of hydraulic support [20]; Tao Zhigang monitors coal and rock movement in real time based on a quasi ...
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worldwide. FBG sensors could be used in smar t condition monitoring system that can allow real-. time and continuous monitoring of the structural and operational conditions of trains as well as ...
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The results show the FBG sensors can be used in coal mines for coal mines safety. 2. FBG stress sensor applied in the coal mine. It is known that the reflective wavelength of …
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The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. 3203 coal mining face in ...
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It can monitor various parameters but for the coal mines the most common sensors are FBG temperature sensors and FBG pressure sensors. Fiber optic sensors are embedded in the structure itself and function during the lifetime. FBG sensors have gained increasing interest due to their ability to alert about any tiny or critical changes.
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The FBG sensor is an all-fiber passive device, which is a functional fiber sensor with FBG as a sensitive element. This type of sensor can be well adapted to the complex environment of coal mines …
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Semantic Scholar extracted view of "Application of FBG sensors for geotechnical health monitoring, a review of sensor design, implementation methods and packaging techniques" by C. Hong et al. ... integrity in underground coal mines.The major issues with the current roof stability monitoring system in underground coal mines … Expand. 3. 1 ...
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Today, fiber optical sensors based on FBGs are widely used in medical healthcare, environmental and biochemical applications, civil infrastructure, the petroleum industry, and in mechanical ...
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This paper briefly introduces the sensing principles of FBG and ultra-weak FBG (UWFBG) technologies for landslide monitoring. A series of FBG-based sensors and their developed methods for ...
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Coal mine micro-seismic events detection based on fibre optic accelerometers. FBG accelerometer sensors are installed such that they can cover the area to be monitored. The sensor system continuously record micro-seismic signals, which are above certain threshold level and are used to locate the source of the events.
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The FBG strain sensors were applied to the Dongtan Mine to monitor the stress variation of the lined wall in the gateway retained along goaf of No. 3203 coal mining face on line. The results showed that the FBG strain sensor with high measuring range could measure the stress variation accurately during the support process of the gateway retained along …
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Abstract: The use of fiber Bragg grating (FBG) sensors is proposed to solve the technical problem of poor sensor stability in the long-term safety monitoring of shaft …
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The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. …
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The FBG sensor is an all-fiber passive device, which is a functional fiber sensor with FBG as a sensitive element. This type of sensor can be well adapted to the complex environment of coal mines and overcome the above problems [9–15]. At present, many scholars have carried out research on the application of FBG sensing technology …
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Application of the fiber Bragg grating (FBG) sensors in coal mines. Wang, Jinyu. ; Song, Guang-Dong. ; Hu, Binxin. ; Li, Lianqing. ; Liu, Tongyu. The FBG strain sensors were …
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A borehole deformation sensor for long-term stress monitoring in coal mine rock based on optical fiber Bragg gratings (FBGs) is presented. The sensor converts borehole deformation into optical fiber strain by using four rings. For each ring, two FBGs are bonded with the ring to measure the borehole deformation, and a reference FBG …
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Fiber Bragg grating (FBG) array is a powerful technique for quasi-distributed sensing along the entire length of sensing fiber with fast response and high precision. It has been widely used for temperature, strain, and vibration monitoring. In this review work, an overview on the recent advances of FBG arrays is conducted. Firstly, the fabrication …
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Abstract:A borehole deformation sensor for long-term stress monitoring in coal mine rock based on optical fiber Bragg gratings (FBGs) is presented. The sensor converts …
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Figure 1. Potential points for FBG sensors in power systems . Working principles of FBG sensors and applications: An optical FBG acts as an electric field sensor and is fabricated on a semiconductor diode that emits light of wavelength 1577.5 nm around its maximum reflectivity point [1]. The intensity of the strong electric field can be easily ...
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