PMMA (polymethyl methacrylate) fiber optic probe as a noncontact liquid level sensor

Binu, S.; Kochunarayanan, K.; Pillai, V. P. Mahadevan; Chandrasekaran, N.

doi:10.1002/mop.25415

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…The refraction angle of point can be obtained by the refraction law sin = sin . Consider sin = sin = sin (19) or tan = sin…”

Section: Coordinate Azimuth and Incident Angle Of Pointmentioning

confidence: 99%

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Light Path Model of Fiber Optic Liquid Level Sensor Considering Residual Liquid Film on the Wall

Zhang

2015

Journal of Sensors

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The working principle of the refractive-type fiber optic liquid level sensor is analyzed in detail based on the light refraction principle. The optic path models are developed in consideration of common simplification and the residual liquid film on the glass tube wall. The calculating formulae for the model are derived, constraint conditions are obtained, influencing factors are discussed, and the scopes and skills of application are analyzed through instance simulations. The research results are useful in directing the correct usage of the fiber optic liquid level sensor, especially in special cases, such as those involving viscous liquid in the glass tube monitoring.

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“…The refraction angle of point can be obtained by the refraction law sin = sin . Consider sin = sin = sin (19) or tan = sin…”

Section: Coordinate Azimuth and Incident Angle Of Pointmentioning

confidence: 99%

“…As the advantage of fiber optic liquid level sensor, the study, and application are wide, a noncontact fiber optic liquid level sensor based on the phenomenon of reflective concept is presented [19]. The device consists of fiber optic transmitter, fiber optic probe, floating reflector, photodiode detector, and digital multimeter.…”

Section: Introductionmentioning

confidence: 99%

Light Path Model of Fiber Optic Liquid Level Sensor Considering Residual Liquid Film on the Wall

Zhang

2015

Journal of Sensors

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“…But the system is not suitable for liquid level measurement of all liquids, since the surface reflectivities of all the liquids are not same. A non contact static liquid level measurement by plastic fiber also was demonstrated [14]. This study proposes a complete system to detect the micro change in liquid level in real time conditions.…”

Section: Introductionmentioning

confidence: 97%

A real time fiber optic micro displacement level sensor

Sengupta

Shankar

Reddy

et al. 2011

2011 Fifth International Conference on Sensing Technology

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Detection of micro change in liquid level using PMMA fiber in real time is demonstrated in this article. This sensor operates on light intensity modulation and such modulation results due to displacement of a floating reflector. The sensor system consists of light source, encapsulated PMMA fiber, floating reflector, photo detector, transimpedence amplifier, multimeter and a data acquisition system for the static and dynamic measurement. A change of 0.0073V at the output of the transimpedence amplifier was observed for 1 µm change in level. high sensitivity, good linearity, simple design and low cost make this sensor suitable for industry.

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“…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: 98%

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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PMMA (polymethyl methacrylate) fiber optic probe as a noncontact liquid level sensor

Cited by 13 publications

References 17 publications

Light Path Model of Fiber Optic Liquid Level Sensor Considering Residual Liquid Film on the Wall

Light Path Model of Fiber Optic Liquid Level Sensor Considering Residual Liquid Film on the Wall

A real time fiber optic micro displacement level sensor

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

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