Simple design of optical fiber displacement sensor using a multimode fiber coupler

Yasin, Moh.; Harun, Sulaiman Wadi; Samian,; Kusminarto,; Ahmad, Harith

doi:10.1134/s1054660x09070123

Cited by 20 publications

(13 citation statements)

References 6 publications

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“…22 Figure 1 illustrates a plastic multimode fiber optic 2 × 2 fused coupler (IF-541) made of polymethyl methacrylate having a split ratio of 80:20, which is used as a vibration sensor. It has low attenuation in the visible region and can be operated in the temperature range from −55°C to 70°C.…”

Section: Introductionmentioning

confidence: 99%

Vibration sensor using 2 × 2 fiber optic coupler

et al. 2013

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A simple fiber optic vibration sensor is designed and demonstrated using fiber optic fused 2 × 2 coupler that utilized the principle of reflected light intensity modulation. In order to avoid source signal power fluctuations and fiber bending losses, the rational output (RO) technique is adopted. A calibrated 1-mm linear and high sensitivity of 0.36 a:u:∕mm (2.1 mV∕μm) region of the displacement characteristic curve is considered for vibration measurement. The experimental results show that the sensor is capable of measuring the frequency up to 3500 Hz with ∼0.03 − μm resolution of vibration amplitude over a dynamic range of 0 to 1 mm. The signal-to-noise ratio of the RO is also improved with respect to the sensing signal. In comparison with dual-fiber and bifurcated-bundle fiber, the designed sensor consists only of a single slope that makes the sensor alignment simple by eliminating the dark region and front slope. Simplicity in design, noncontact measurement, high degree of sensitivity, and economical, along with advantages of fiber optic sensors, are the attractive attributes of the designed sensor that lend support to real-time monitoring and embedded applications.

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Section: Introductionmentioning

confidence: 99%

Vibration sensor using 2 × 2 fiber optic coupler

et al. 2013

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“…Wavelength modulation need fiber Bragg grating and optical spectrum analyzer for physical parameter detection and data acquisition, respectively, which are very costly. The intensity modulatedbased sensors use the modulation of light power transmitted between the head of the sensor and the target surface (Yasin et al, 2009) for displacement measurements, the light intensity modulation is the simplest method to obtain a high resolution measurement. The intensity modulated sensors compete well with other sensing methods as they are relatively inexpensive, contact less, easy to be fabricated and suitable for employment in harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Fiber optic displacement sensor using fiber coupler probe and real objects

Yasin

Rahman

Bidin³

et al. 2012

Sensor Review

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Purpose -The purpose of this paper is to demonstrate a simple design of a fiber optic displacement sensor using a multimode plastic fiber coupler based on reflective intensity modulation technique. Design/methodology/approach -The performances of this sensor are investigated by correlating the detector output with different light sources, coupling ratios and various real objects with different reflectivity properties namely aluminum, brass and copper. In contrast to the output profile produced by probes with multiple fibers placed adjacently together, this sensor uses only one fiber for sending and receiving the light and therefore only the back slope exists. Findings -Aluminum exhibit the highest performance among the real objects when coupled with a red He-Ne laser and a coupling ratio of 50:50 with a sensitivity, linear range, resolution and dynamic range of 1.7 mV/mm, 1.5 mm, 16 mm, and 5.0 mm, respectively. Originality/value -This is the first demonstration of a fiber optic displacement sensor using fiber coupler probe with successful examination of the correlation between the detector output, variation in coupling ratios and reflectivity properties of the tested real objects.

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“…The breakthrough of optical fiber based sensor has developed variety form of physical sensors for a wide range of physical parameters [1][2][3][4][5][6][7][8][9][10][11][12][13]. Physical parameters such as displacement, pressure, temperature, strain, refractive index and electric field can be detected by using optical fiber sensors [2][3][4][5][6][7][8][9][10][11][12][13][14][15] . They indicate very high performance when being compared with conventional transducers [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Physical parameters such as displacement, pressure, temperature, strain, refractive index and electric field can be detected by using optical fiber sensors [2][3][4][5][6][7][8][9][10][11][12][13][14][15] . They indicate very high performance when being compared with conventional transducers [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The optical fiber displacement sensor using a multimode fiber coupler in conjunction with reflective intensity modulation technique has wide application [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Yang et al, [15] emphasized on the comparison between theoretical and experimental study of self-reference intensity-modulated plastic fiber optic linear array displacement sensor.…”

Section: Introductionmentioning

confidence: 99%

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Fiber Optic Displacement Sensor for Industrial Applications

et al. 2015

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Owing to industrial applications, a fiber optic displacement sensor is introduced to determine the concentration of hydrocarbons in water. Hydrocarbon is organic water pollution. It can harm the environment as well as human being. Thus, a reflective configuration technique was developed to study the hydrocarbon concentrations in the range of 0-20%. To validate the designed system, two concentrations were selected which represent the lower and higher region. In principle, this sensor is using the concept of intensity modulation as a function of displacement. The optimum displacement between the reflecting target and the fiber optic probe was found to be at 1.5 mm for all concentrations. Furthermore, the peak voltage from each fingerprint was found to be inversely proportional to the tested concentration. This implies that the higher concentration of hydrocarbon tends to detect weaker signal. The sensitivity of the fiber optic displacement sensor was found to be 0.12 mV/wt. % with repeatability of 96 %. The resolution of the sensor was 0.027 V, with a limit of detection of 0.23%. The linearity index was found to be 0.98 and 1.04 corresponding to 6% and 14% hydrocarbon concentration respectively. The simplicity and the credibility of such system offer a good opportunity for industrial applications especially in the environmental sector 1530-437X (c)

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Simple design of optical fiber displacement sensor using a multimode fiber coupler

Cited by 20 publications

References 6 publications

Vibration sensor using 2 × 2 fiber optic coupler

Vibration sensor using 2 × 2 fiber optic coupler

Fiber optic displacement sensor using fiber coupler probe and real objects

Fiber Optic Displacement Sensor for Industrial Applications

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