Appliion of a FBGBased Instrumented Rock Bolt in a TBM

Research Article Appliion of a FBGBased Instrumented Rock Bolt in a TBMExcavated 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 St, Huainan 232001, China 2Postdoctoral Research Station, Huainan Mining

Appliion of Distributed Optical Fiber Sensing

Appliion of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBMExcavated Coal Mine Roadway Bin Tang and Hua Cheng Compared with fully distributed fiber optic sensor systems, FBG systems call for an excessive number of sensors and that leads to high cost. Moreover, most commercially

Coal Mine Disaster Rescue Life Sign Monitoring Technology

This is a qualitative measure appliion 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.

Temperatureinsensitive 2D tilt sensor with three fiber

compensated FBG sensors KiSun Choi, YongHak Huh, IlBum Kwon A fiber Bragg grating tilt sensor for posture monitoring of hydraulic supports in coal mine working face Minfu Liang et alThis content was downloaded from IP address 157.55.39.172 on 23/06/2019 at 00:23 Tilt sensors have potential appliions in many fields, such as the

Measurement Method of Thrust Sliding Bearing Bush Based

in the drilling process. In 2015, Jiu Tan [20] used FBG sensor to realize realtime monitoring of temperature distribution in goaf of coal mine, and formed the production technology and method of the temperature measuring cable for coal mine. In order to meet the demand of the sliding thrust bearing temperature distribution measurement,

Feasibility Study on Temperature Distribution Measurement

In 2015, Jiu Tan used FBG sensor to realize realtime monitoring of temperature distribution in goaf of coal mine, and formed the production technology and method of the temperature measuring cable for coal mine.

FBG Interrogation Analyzer BaySpec

Devices interrogate multiple wavelengths for precise FBG sensorsystem strain or temperature measurements. They are now widely deployed in coal mine safety systems, oil and gas downhole drilling, electrical power gridmonitoring systems, fire prevention systems, power plant monitoring systems, wind turbine monitoring, defense and homeland security systems, structural health

IOT Based Coal Mine Safety Monitoring and Alerting System

The disasters happening in coal mine are due to the complexity of mine environment and the variety of work carried out in coal mine, so it is very necessary to monitor the working environment of coal mine. To get over this problem, Nevon projects has proposed a wireless sensor network''s appliion in coal mining safety system.

Evolution of Gas Sensors in the Mining Industry

This article discusses how gas sensors have evolved from biosensors such as the canary to IR gas analysers for their appliion in the mining industry. Coal mining became a largescale industry at the beginning of the 18th century. With coal being the main energy source, the low cost and high abundance of this material made coal mining

Design and appliion of fiber Bragg grating (FBG

Design and appliion of fiber Bragg grating (FBG) geophone for higher sensitivity and wider frequency range Twenty fibers Bragg grating microseismic sensors are installed in the coal mine. Fig. 7 exhibits the setting loion below coal mine of the twenty geophones. The longest distance is about six kilometers. The shortest distance is

Fiber Optic Sensor in Mine Hazard Monitoring

revolutionizing coal mine and mineral mine safety nFiber optic FBG sensors, DTS, laser spectroscopic gas sensors, seismic sensors have been successfully demonstrated to become a comprehensive mining safety and hazard management info system nThe diversified, online, multiloion information provides a foundation for more accurate and timely

Fbg Interrogation Analyzer Buy Fbg Sensing Product on

Fbg Interrogation Analyzer, Find Complete Details about Fbg Interrogation Analyzer,Fbg Sensing from Temperature Instruments Supplier or ManufacturerBaySpec, Inc. (FBG) sensor system strain or temperature measurements. They are now widely deployed in coal mine safety system, oil/gas down hole drilling, electrical power grid monitoring

Articles about Fiber Bragg Gratings (FBG), Photonic and

Another area of appliion for FBG temperature sensors is gas turbine monitoring. The FBG sensor arrays facilitate measurements of hot gas working temperatures within a turbine this data is critical for safe, reliable, efficient, and costeffective operation. Accurate measurements of the blades and vanes inside the turbines will allow

Fiber optic sensorsbased intelligent coal mines

Fiber optic sensorsbased intelligent coal mines time the concept of fiber optic sensors based intelligent coal mine system, which sensor for mining appliions. FBG strain and mining

Research on Coal Mine Safety Monitoring System Based on

Feb 21, 2018 · Research on Coal Mine Safety Monitoring System Based on Zigbee Wireless Sensor Network''s Appliion in Coal Mine Safety Coal Mine Safety Monitoring System Research on Mine Safety Monitoring

Research on FBGBased Sensor Networks and Their

Market forecasts and trends for the usage of fiber optical sensors confirm that demand for them will continue to increase in the near future. This article focuses on the research of fiber Bragg grating (FBG) sensor network, their appliions in IoT and structural health monitoring (SHM), and especially their coexistence with existing fiber optical communiion system infrastructure. Firstly

Strain Transfer of Bonded FBG Sensor for Coal Mining

To accurately monitor the strain of a host with low strength, a new strain transfer model is proposed for the substrate FBG sensor. In the strain transfer model, the mechanical properties of the

Smart Materials and Structures TECHNICAL NOTE Related

2.1. FBG sensor The proposed load measuring anchor plate is a normal anchor plate instrumented with FBG strain sensor. In order to measure the load of an anchor plate for a rock bolt, a 2mm deep vshaped groove was cut on the inner surface along a length of the plate, and an FBG was installed into the center of

Research on FBGBased Sensor Networks and Their

optical sensor installation and deployment methods. For instance, there are appliions evaluated [5] where FBG optical sensors are embedded in concrete to measure strain and monitor tracks. According to [6], topical research theme in a matter of SHM is also an underground coal mine monitoring due to the occurring construction accidents. Further

BOTDR What does BOTDR stand for? The Free Dictionary

Looking for online definition of BOTDR or what BOTDR stands for? BOTDR is listed in the World''s largest and most authoritative dictionary database of abbreviations and acronyms The Free Dictionary

The Appliion of Fault Detection Technology in the Coal

The Appliion of Fault Detection Technology in the Coal Mine Water Level Sensor Abstract: The accuracy of traditional modelbased fault detection of coal mine water level sensor is easily influenced by modeling errors and disturbances of complex mine environment, which cause underreporting or false alarms. In order to solve the problem, this

Development and Utilisation of Fibre Opticbased

based sensors for mining appliions. The research has so far received financial support from UQ, Australian Coal Association Research Program (ACARP) and CRCMining. The scope of research includes the investigation of potential mining appliions of existing fibreoptic sensing technology in

A Fiber Bragg GratingBased Monitoring System for Roof

sensors Article A Fiber Bragg GratingBased Monitoring System for Roof Safety Control in Underground Coal Mining Yiming Zhao 1,*, Nong Zhang 1 and Guangyao Si 2 1 Key Laboratory of Deep Coal Resource Mining of the Ministry of Eduion, School of Mines, China University of Mining and Technology, Xuzhou 221116, China [email protected] .cn

Advances in fibre optic based geotechnical monitoring

A number of FBG based roof separation sensors using this design principle have been developed and tested recently in underground coal mines in China. Zhao et al. reported a wide strain range FBG sensor for coal mine roof monitoring . This FBGbased instrument is developed on the concept proposed for surface mine large crack monitoring . The

Fibre optic sensors for coal mine hazard detection

For coal mine engineering use, lowcost and robustness may be more critical than sensitivity. The fibre Bragg grating and cantilever type accelerometers exhibit good frequency response and crosssensitivity hence were developed for coal mine appliions . The schematic of the accelerometer is shown in Fig. 23. The FBG element experiences

Method Research of Coal Mine Roof Strain Detection Based

In order to solve the problem that the measure precision of coal roof rock strain amount detection using traditional electric sensor is insufficient, a kind of High Sensitive SurfacePasted Fiber Bragg Grating Strain Sensor based on rock bolting is designed for substitution. Furthermore, a kind of Reference Grating ZeroStrain method based on sensitivity matrix coefficient is proposed for

Zigbee Based Alerting System for Mine Workers

This system is well applicable in coal mines and gold mines .The system can also be easily extended with ZigBee wireless image transmission facility. The project "ZIGBEEE BASED ALERTING SYSTEM FOR MINE WORKERS" provides alerting for mine workers inside mines. The thermistor and smoke sensor are connected to the AT89S52 which needs

Fiber Optic Sensing Instruments ASE Light Sources FBGA

Appliions. Biological & Food (FBG) sensor system strain or temperature measurements. They are now widely deployed in coal mine safety systems, oil/gas down hole drilling, electrical power grid monitoring systems, fire prevention systems, power plant monitoring systems, wind turbine monitoring, security/homeland defense systems

Appliion of Distributed Optical Fiber Sensing

Journal of Sensors + Journal Menu. PDF. Journal overview. For authors For reviewers For in this case, the cost would increase to over 600,000 RMB due to the high price of FBG sensors (700 RMB). Moreover, the cost of BOTDR monitoring could be even lower in future coal mine appliions because abandoned boreholes (such as sampling boreholes

Coal Mine Disaster Rescue Life Sign Monitoring Technology

The emergency rescue for coal mine disaster is very important to mine security. The environments of coal mine is complied and dangerous. In order to ensure the selfsecurity of rescuer, minimizing the accident losses, the emergency rescue life sign monitoring sensor based on Fiber Bragg Grating(FBG) and threeaxis acceleration sensor are studied in this paper.

Coal Mine Monitoring Using ARM7 and ZigBee

the use of optic fiber sensor at the coal mine has shown some drawbacks also like display value jumped, the laser power got weak and so on. In [16] a high sensitive microseismic fiber Bragg grating (FBG) sensor system based on narrow line width distributed feedback (DFB) laser is realized by using filtering demodulation. Results show that

1. Introduction

As the coal resources within shallow grounds are depleting and coal mining operations are moving to deeper grounds, approximately 60% of the coal mining works are currently conducted with a mining depth of over 800 m in China [1].The impacts of high ground stress and weak strata are encountered within the mining operation works in deeply buried coal mines [2, 3].

Fibre optic sensors for mine hazard detection

et al [1] has created lots of interest for coal mine appliions. Field trials of DFB laser diode based fibre optic sensors were reported [2]. Conventional coal mine roof condition monitoring is carried out using strain gauge array surface mounted on a steel bar, which tends to drift and typically on manual survey to take the data reading.

Appliion of Gas Monitoring Sensors in Underground Coal

Appliion of Gas Monitoring Sensors in Underground Coal Mines and Hazardous Areas atmosphere for safety of underground coal mines. Each sensor has

Appliion of a FBGBased Instrumented Rock Bolt in a TBM

This work proposed a FBGbased instrumented rock bolt. Quasidistributed FBG sensors were installed on a slotted rock bolt and encapsulated by epoxy resin that was used to fix FBG sensors on the rock bolt and protect FBG sensors from damage. The FBG sensors were calibrated before the in situ appliion.

Fibre Optic Sensors for Coal Mine Hazard Detection

Aug 13, 2018 · Methane gas and coal combustion have been recognized by the coal mine industry as two major hazards, which resulted in most of the heavy casualties and economic losses. Conventional alytic methane gas sensors suffer from poor accuracy and cumbersome maintenance, which is the bottleneck of methane hazard prevention.

IoT BASED MINE SAFETY SYSTEM USING WIRELESS

The appliion of wireless sensor network will improve the safety of coal mine. The wireless are more flexible and can avoid of rewiring and also it will greatly improve the performance and efficiency of data transmission of the coal mine safety system. In this appliion, as we are storing the values of the parameters in the PC, the