Non-Contact Vibration Sensor using Bifurcated Bundle Glass Fiber for Real Time Monitoring

Kishore, Putha; Dinakar, D.; Shankar, M. Sai; Srimannarayana, K.; Rao, P. Vengal; Sengupta, Dipankar; Reddy, P. Narsimha

doi:10.1364/acp.2011.83110p

Cited by 4 publications

(5 citation statements)

References 12 publications

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“…The fiber combination of lower diameter shows better response than any combination and it exhibits the high frequency response with high resolution when compare with others. However, this dark region is one of the major drawback of the sensor configuration [20,21].…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, the back slope shows high linearity in the range between 1600 μm and 2600 μm with sensitivity of 1.696 mv/μm. Therefore, the front slope exhibits relatively high sensitivity but over small measurable range compared to the back slope and is better suited for the measurement of amplitude of vibration in micro level [20,21].…”

Section: Dual Optical Fibersmentioning

confidence: 99%

“…According to the light intensity distribution function, the irradiance of emitted light from transmitting fiber is expressed as [20,21]. Where r and z represent the radial and longitudinal coordinates respectively, and ω z ðÞis the beam radius which can be expressed as a function of z given below…”

Section: Theorymentioning

confidence: 99%

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Fiber Optic Vibration Sensors

Kishore¹,

Dinakar²,

Padmavathi³

2021

Optoelectronics

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The sensors presented in this chapter are fiber optic intensity modulated vibrations sensors which are non-contact (extrinsic sensor) to the vibrating object. Three sensors presented make use of non-contact vibration measurement method with plastic fiber using distinct designs, improvement of the sensor response and advantages of one sensor over the other for diverse applications. First discussed about dual plastic optical fiber vibration sensor design and its response. Secondly, discussed about 1x2 fused coupler plastic optical fiber vibration sensor design with advantages over the first one. Finally, discussed about the 2x2 fused coupler plastic optical fiber vibration sensor design along with advantages than other two methods. At the end reported the final results with comparison.

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Section: Methodsmentioning

confidence: 99%

Section: Dual Optical Fibersmentioning

confidence: 99%

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Fiber Optic Vibration Sensors

Kishore¹,

Dinakar²,

Padmavathi³

2021

Optoelectronics

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show abstract

“…Because of its complex and expensive setups limit their practical use and not well suited to map the amplitude of vibration in several test points [7]. Second one takes the advantage of change in intensity corresponding to vibration using PMMA fiber optic sensor [8,9]. Presence of advantages like low-cost, stable and portable sensor for the detection of vibration has led to this work to study the effect of diameter of the transmitting and receiving fibers on sensing.…”

Section: Introductionmentioning

confidence: 99%

Study the effect of fiber-dia on the alongside dual-plastic optical fiber vibration sensor

Kishore

Dinakar

Rao

et al. 2015

J Opt

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An alongside dual-plastic optical fiber vibration sensor is designed based on the reflection intensity modulation and study the effect of transmitting fiber (TF) and receiving fiber (RF) diameter on the sensor response is studied. Three fibers of 0.75, 1 and 1.5 mm diameter are chosen with nine pair combinations for vibration measurement. From displacement response, it is observed that the sensitivity of the sensor increases as the diameter of the RF decreases and vice versa. The test results show that the frequency range increases when the RF diameter is less than the TF and vice versa. The resolution of the sensor also increases when the difference in diameters of the TF and RF decreases and vice versa. Moreover it is evident from the results that the dynamic range, range of frequency can be optimized by choosing the suitable diameter of the TF or RF as for the application.

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“…In comparison to dual-fiber and bifurcated bundle fiber, which exhibit two slopes, the designed sensor consists of only a single slope that makes the sensor alignment simple by eliminating the dark region and front slope. 17,18 Moreover, the rational output (RO) between the sensing and the reference signals minimizes the effect of source fluctuations and bending losses at the source end. 19 2 Theory and Design of the Sensor In general, the required major quantity to measure the vibration is displacement.…”

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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Non-Contact Vibration Sensor using Bifurcated Bundle Glass Fiber for Real Time Monitoring

Cited by 4 publications

References 12 publications

Fiber Optic Vibration Sensors

Fiber Optic Vibration Sensors

Study the effect of fiber-dia on the alongside dual-plastic optical fiber vibration sensor

Vibration sensor using 2 × 2 fiber optic coupler

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