Fibre position effects on the operation of opto-pair fibre displacement sensors

Jafari, Rana; Golnabi, H.

doi:10.1016/j.optlastec.2010.11.005

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…Further studies of the reflectance at 531 nm as a function of the axial distance d 0 from the face of the optical fibre probe are reported in figure 4 (boxes), where it is shown that the reflectance decreases monotonically with the distance. In [5,7], theoretical and experimental results were presented which demonstrated that the detected optical signal first increased with distance, due to an increased overlap between the light cone of the emission and the detection fibres, before it reached a maximum and subsequently decreased with distance to the sample. In the current study, we were not able to place the sample closer to the optical fibre probe face than about 0.5 mm due to geometric constraints, and therefore did not detect an increase in the signal with increasing distance.…”

Section: Resultsmentioning

confidence: 99%

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Optical fibre spectrometer combined with a magnetic resonance sensor for multiple depth monitoring

Helseth

2013

Meas. Sci. Technol.

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Under some circumstances, it is necessary to do optical spectroscopy on a front surface while at the same time monitoring the presence of a hidden metallic layer. Here, a novel sensor system to do this based on the combination of a visible light optical fibre spectrometer with a magnetic resonance eddy current sensor is demonstrated. It is shown that the the eddy current sensor can probe a hidden metallic film placed up to 1 cm behind the dielectric front surface. The combination of two such detection principles allows one to probe layered materials at multiple depths, revealing their electromagnetic properties at different frequencies.

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Section: Resultsmentioning

confidence: 99%

“…Optical fibre sensors have found widespread applications due to their versatility and cost-effective performance [1][2][3][4][5][6][7]. Such sensors can typically be used for spectroscopy of surfaces, thus enabling the fingerprinting of molecules and monitoring of chemical reactions, physical and biological processes [8,9].…”

Section: Introductionmentioning

confidence: 99%

Optical fibre spectrometer combined with a magnetic resonance sensor for multiple depth monitoring

Helseth

2013

Meas. Sci. Technol.

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“…Fiber-based devices are widely studied for the advantage in their response to many physical parameters such as displacement, pressure, temperature and electric field [ 1 , 2 , 3 ]. Recently, intensity-based fiber displacement sensors have received significant attention from the research community for their inherent advantages such as compactness, light weight, small size, non-contact measurement and immunity to a hostile environment [ 4 , 5 , 6 , 7 , 8 ]. Montero [ 9 ] demonstrated a radio-frequency self-referencing WDM intensity-based optical sensor operating in reflective configuration.…”

Section: Introductionmentioning

confidence: 99%

A Differential Reflective Intensity Optical Fiber Angular Displacement Sensor

Jia

Yan

et al. 2016

Sensors

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In this paper, a novel differential reflective intensity optical fiber angular displacement sensor was proposed. This sensor can directly measure the angular and axial linear displacement of a flat surface. The structure of the sensor probe is simple and its basic principle was first analyzed according to the intensity modulation mechanisms. Secondly, in order to trim the dark output voltage to zero, the photoelectric conversion circuit was developed to adjust the signals. Then, the sensor model including the photoelectric conversion circuit has been established, and the influence of design parameters on the sensor output characteristic has been simulated. Finally, the design parameters of the sensor structure were obtained based on the simulation results; and an experimental test system was built for the sensor calibration. Experimental results show that the linear angular range and the sensitivity of the sensor were 74.4 and 0.051 V/°, respectively. Its change rules confirm the operating principle of the sensor well.

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“…Fiber optic has many advantages of extremely simple structure, low fabrication cost, high sensitivity, high resistance to electromagnetic interference, and it is suitable for many harsh environments [5,6]. The reflective optical fiber sensors utilize modulation of reflected light intensity to measure displacement [7][8][9][10], which have very simple structure and large measurement range. An inclined two fiber displacement sensor is also presented [11], with the dependences of performance metrics reported.…”

Section: Introductionmentioning

confidence: 99%

“…It is important to establish and analyze the theoretical model of reflective fiber optic sensors to provide theoretical basis for design. Most existing reflective fiber optic sensors are based on large enough reflective planes, especially in fiber optic distance measurement sensors [9][10][11]. Furthermore, there are also needs for fiber optic sensors with finite reflective surface to measure displacement.…”

Section: Introductionmentioning

confidence: 99%

Fiber optic displacement measurement model based on finite reflective surface

Guan

2016

Optics & Laser Technology

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We present a fiber optic displacement measurement model based on finite reflective plate. The theoretical model was derived, and simulation analysis of light intensity distribution, reflective plate width, and the distance between fiber probe and reflective plate were conducted in details. The three dimensional received light intensity distribution and the characteristic curve of light intensity were studied as functions of displacement of finite reflective plate. Experiments were carried out to verify the established model. The physical fundamentals and the effect of operating parameters on measuring system performance were revealed in the end.

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Fibre position effects on the operation of opto-pair fibre displacement sensors

Cited by 9 publications

References 17 publications

Optical fibre spectrometer combined with a magnetic resonance sensor for multiple depth monitoring

Optical fibre spectrometer combined with a magnetic resonance sensor for multiple depth monitoring

A Differential Reflective Intensity Optical Fiber Angular Displacement Sensor

Fiber optic displacement measurement model based on finite reflective surface

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