Design and application of fiber Bragg grating (FBG) geophone for higher sensitivity and wider frequency range

Wang, Jinyu; Hu, Binxin; Wei, Li; Song, Guangming; Jiang, Long; Liu, Tongyu

doi:10.1016/j.measurement.2015.09.041

Cited by 36 publications

(9 citation statements)

References 14 publications

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“…e occurrence position, main frequency distribution, MA range, and duration of MS events obtained from the study are of great significance to the research of rock burst mechanism and parameter design of the monitoring system in heading face. Occurrence position determines the layout principle of measuring points of the MS system, the main frequency range determines the sampling frequency of the acquisition instrument and the receiving frequency of the sensor, the maximum value of MA determines the range of the sensor [47], and the duration determines the storage time of a single waveform when the original waveforms are stored.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Zhang

Huo

et al. 2021

Shock and Vibration

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Rock burst monitoring of heading face is a weak aspect of rock burst monitoring in China; acoustic emission (AE) monitoring is one of the few monitoring technologies used in heading face, but its target signals are small energy events which are easy to be disturbed. Researchers usually focus on the weak AE events but ignore the microseismic (MS) events (different from AE event and caused by a larger scale of coal fracture), while this kind of events can also reflect the pressure situation of heading face and have higher energy value which may become a better indicator for rock burst monitoring of heading face. So, the basic characteristics of MS events in heading face are studied based on a running vibration signal acquisition system, including the occurrence position, main frequency range, maximum amplitude (MA) range, event duration, and relationship with geological structure. This paper provides a development basis of the monitoring method for rock burst monitoring of heading face by using MS events.

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Section: Discussionmentioning

confidence: 99%

Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Zhang

Huo

et al. 2021

Shock and Vibration

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“…But the length of cable which can transmit the signal from the downhole to the ground is more than 10km, and the impedance is very large, so it may results in voltage signal attenuation. [3] In addition, the electromagnetic interference in the coal mine is more serious [4] , and further it can causes the test signal severely deviates from the original signal, eventually, the analysis result can't reflect the micro-seismic events truly. Therefore, it is very important to design high-precision circuits which can transmit micro-seismic signal in long distance.…”

Section: Figure 1seismic Monitoring In Minesmentioning

confidence: 99%

Design of long-distance transmission circuit of high precision micro-seismic signals for mines

Zhang¹,

Hu²,

Jiang³

et al. 2018

Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)

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This paper presents a long distance transmission circuit of high precision micro-seismic signals for mines. This circuit implements current loop and isolation gate to improve the precision of mine micro-seismic signal acquisition and data quality. The test result shows that the transmission circuit can transmit micro-seismic signal for 10km in real time and the dynamic range of the circuit is 77dB.The circuit demonstrates low power consumption and high precision capability.

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“…The interrogation principle of the FBG-based acceleration sensor depends on the intensity modulation of narrow line width DFB laser [7,8], when a reflection or transmission spectrum curve of an FBG wavelength shifts due to the strain caused by vibration or acceleration. …”

Section: Fbg-based Micro-seismic Sensormentioning

confidence: 99%

Research on the surface subsidence monitoring technology based on fiber Bragg grating sensing

Wang

Jiang²,

Sun³

et al. 2016

Photonic Sens

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Abstract:In order to monitor the process of surface subsidence caused by mining in real time, we reported two types of fiber Bragg grating (FBG) based sensors. The principles of the FBG-based displacement sensor and the FBG-based micro-seismic sensor were described. The surface subsidence monitoring system based on the FBG sensing technology was designed. Some factual application of using these FBG-based sensors for subsidence monitoring in iron mines was presented.

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Design and application of fiber Bragg grating (FBG) geophone for higher sensitivity and wider frequency range

Cited by 36 publications

References 14 publications

Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Design of long-distance transmission circuit of high precision micro-seismic signals for mines

Research on the surface subsidence monitoring technology based on fiber Bragg grating sensing

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