Microseismic wave detection in coal mines using differential optical power measurement

Gautam, Abhinav; Kumar, Amitesh; Priye, Vishnu

doi:10.1117/1.oe.58.5.056111

Cited by 15 publications

(7 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using the Kullback-Leibler (KL) concept of divergence, in (5), 𝐹(𝐺(𝜆), 𝐷 * (𝜆)) is minimum when 𝑃 𝑔(𝜆) is minimum, say equal to zero. Thus, the minimum of 𝑃 𝑔(𝜆) means that the true signal is identified by calculating the loss functions of the generated signal and the real FBG signal.…”

Section: B) Generator Model Trainingmentioning

confidence: 99%

“…It has a better capability to be immune to the electromagnetic interference [2]. FBGs have been used in different fields of industries, including aerospace, structural health monitoring, micro seismic wave detection, inclination measurement, and load measurement systems [3][4][5][6][7]. The reflected spectral data of FBG is generally measured by an optical spectrum analyser (OSA), but it is not suitable for a dynamic peak measurement.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Opto-Electronics Review

Kumar,

Sengupta

2022

View full text Add to dashboard Cite

An adaptive and precise peak wavelength detection algorithm for fibre Bragg grating using generative adversarial network is proposed. The algorithm consists of generative model and discriminative model. The generative model generates a synthetic signal and is sampled for training using a deep neural network. The discriminative model predicts the real fibre Bragg grating signal by the calculation of the loss functions. The maxima of loss function of the discriminative signal and the minima of loss function of the generative signal are matched and the desired peak wavelength of fibre Bragg grating is determined. The proposed algorithm is verified theoretically and experimentally for a single fibre Bragg grating peak. The accuracy has been obtained as ±0.2 pm. The proposed algorithm is adaptive in the sense that any random fibre Bragg grating peak can be identified within a short wavelength range.

show abstract

Section: B) Generator Model Trainingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Opto-Electronics Review

Kumar,

Sengupta

2022

View full text Add to dashboard Cite

show abstract

“…The measurement of building vibrations can detect defects and provide early warning. The accelerometers are used for monitoring seismic activity, drilling processes, high and low tides, volcanic events and other processes and operations [12][13][14][15][16]. Such accelerometers require superhigh sensitivity and a low-frequency response.…”

Section: Introductionmentioning

confidence: 99%

An Optical Measuring Transducer for a Micro-Opto-Electro-Mechanical Micro-g Accelerometer Based on the Optical Tunneling Effect

et al. 2023

View full text Add to dashboard Cite

Micro-opto-electro-mechanical (MOEM) accelerometers that can measure small accelerations are attracting growing attention thanks to their considerable advantages—such as high sensitivity and immunity to electromagnetic noise—over their rivals. In this treatise, we analyze 12 schemes of MOEM-accelerometers, which include a spring mass and a tunneling-effect-based optical sensing system containing an optical directional coupler consisting of a fixed and a movable waveguide separated by an air gap. The movable waveguide can perform linear and angular movement. In addition, the waveguides can lie in single or different planes. Under acceleration, the schemes feature the following changes to the optical system: gap, coupling length, overlapping area between the movable and fixed waveguides. The schemes with altering coupling lengths feature the lowest sensitivity, yet possess a virtually unlimited dynamic range, which makes them comparable to capacitive transducers. The sensitivity of the scheme depends on the coupling length and amounts to 11.25 × 103 m−1 for a coupling length of 44 μm and 30 × 103 m−1 for a coupling length of 15 μm. The schemes with changing overlapping areas possess moderate sensitivity (1.25 × 106 m−1). The highest sensitivity (above 6.25 × 106 m−1) belongs to the schemes with an altering gap between the waveguides.

show abstract

“…Factors such as high temperature, humidity, and electromagnetic environment tend to result in low accuracy and poor reliability in signal sensing and transmission, which means the system is unable to guarantee long-term stable monitoring. Since they are limited by the safety requirements of high gas coal mines, such electrical sensors cannot be used [5,8,9].…”

Section: Introductionmentioning

confidence: 99%

Construction and Application of On-Line Roof Separation Monitoring System Based on High-Precision FBG Indicator

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

Aiming at the existing problems of low efficiency, lagging monitoring results, and poor reliability and accuracy in the present roadway roof separation monitoring system, a high-precision Fiber Bragg Grating (FBG) separation indicator is designed through theoretical analysis, numerical simulation, and laboratory tests—according to the fiber grating sensing principle. Based on the Microsoft. Net platform, C# programming language, and VS2010 integrated development tools, the corresponding on-line monitoring software is developed. On this basis, a real-time on-line roof separation monitoring system is proposed. The high-precision FBG separator was calibrated and tested in the laboratory and results suggested that both the left and right arm demonstrate good sensitivity and linearity with linear fitting coefficient values of 0.9981 and 0.9979, respectively. The monitoring system was successfully applied to roof separation monitoring of the #14301 rail roadway in the Shaqu coal mine. The monitoring results showed that the on-line roof separation monitoring system based on the high-precision FBG separation indicator has the advantages of high precision, good stability, and long-distance signal transmission, which can achieve real-time dynamic monitoring and provides an effective method for long-term on-line monitoring of roadway roof separation.

show abstract

Microseismic wave detection in coal mines using differential optical power measurement

Cited by 15 publications

References 29 publications

Opto-Electronics Review

Opto-Electronics Review

An Optical Measuring Transducer for a Micro-Opto-Electro-Mechanical Micro-g Accelerometer Based on the Optical Tunneling Effect

Construction and Application of On-Line Roof Separation Monitoring System Based on High-Precision FBG Indicator

Contact Info

Product

Resources

About