Angle sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber

Chen, Zhao; Wang, Rui; Zhou, Yumeng; Niu, Luo; Gong, Huaping

doi:10.1016/j.ijleo.2016.12.043

Cited by 19 publications

(5 citation statements)

References 12 publications

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“…However, the above rotational sensors are based on the conventional sensing method. The alternative approach to the developed rotational sensor is based on fiber-optics [ 36 , 37 , 38 , 39 , 40 ]. Among the different sensor designs, Azmi et al [ 41 ] presented a rotational and dynamic bending sensor using seven core fibers based on coherence interferometry, where they achieved a sensitivity of 6.2 fringe/° and the range was 360°.…”

Section: Introductionmentioning

confidence: 99%

“…Among the different sensor designs, Azmi et al [ 41 ] presented a rotational and dynamic bending sensor using seven core fibers based on coherence interferometry, where they achieved a sensitivity of 6.2 fringe/° and the range was 360°. However, the fiber-based rotational sensors were developed using either glass optical fibers (GOFs) or polymer optical fibers (POFs) [ 38 , 42 ]. The POFs have unique characteristics over GOFs as POFs are cheap, flexible, and easy to handle as well as easy to bend [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Rotational Sensor Using Polymer Optical Fiber for Robot Movement Assessment Based on Intensity Variation

Shi

Ghaffar

et al. 2022

Polymers

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A complex signal processing technique is usually required to process the data in most sensor design structures, and integration into real applications is also challenging. This work presents a dynamic rotational sensor using polymethyl methacrylate (PMMA) fiber for robot movement assessment. The sensor design structure is based on the coupling of light intensity, in which two PMMA fibers are twisted together. Both fibers are bent after twisting and attached on the linear translation stage, which is further attached to the robot. The variation in bending radius causes the bending loss, and that loss is coupled in the second fiber. The change in the macro-bend radius corresponds to the rotation of the robot. Experimental results indicate that the sensor can operate in full rotational cycle (i.e., 0°–360°) as well as for clock and anti-clockwise rotation. Moreover, different rotational speeds (2°/s, 3°/s, 5°/s, and 10°/s) were carried out. The hysteresis loss of the sensor was about 0.77% and the sensitivity was 8.69 nW/°. The presented dynamic rotational sensor is cost-effective and easily integrated into the robot structure to analyze the robot’s circular motion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Rotational Sensor Using Polymer Optical Fiber for Robot Movement Assessment Based on Intensity Variation

Shi

Ghaffar

et al. 2022

Polymers

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“…Chen, et al [26] had designed an all-fiber inclinometer with an extinction ratio of >30.4 dB by introducing two abrupt tapers in a short length of highly Er/Yb co-doped fiber. The sensors reported in [4,27] have a complicated structure, a costly development process, and they may also have relatively low sensitivity. Sun, et al [9] has reported robotic magnetic encoders for industrial power tools, torque-sensing, and factory-robotic arms and shown higher physical requirement and lower accuracy with low-cost applications.…”

Section: Introductionmentioning

confidence: 99%

Plastic Optical Fiber Angle Sensor for 1-D and 2-D Based On Cascading Of TMBC

Ghaffar

Chhattal

Mehdi

et al. 2022

Preprint

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The developed angle sensors are usually used for either clockwise or an anti-clockwise direction. Here, we present a relatively new setup of two angle sensors (1-D and 2-D) for independent and simultaneous clock and anti-clockwise rotation measurements. The proposed sensor is based on the twisted macro-bend coupling method (TMBC), in which two fibers are twisted and bent. The two-angle sensors are presented in which sensor-1 consists of a single twisted bend and sensor-2 contain two twisted bends on a single transmitting fiber. The angle measurement relies on the coupling of macro-bend loss. The stepper motor is used to drag the twisted fiber, resulting in a change in the bending radius that increases or decreases the macro-bend loss. A novel cascading method is introduced in the TMBC method for the sensor-2 and, two stepper motors are used in the second experiment. To prove the practicality, several test scenarios are conducted for both sensor configurations. The experimental results show that sensor-1 can measure angle ±180º, whereas the full clock and anti-clockwise cycle are achieved through sensor-2, having a measurement range is ±360º. Therefore, the proposed sensor can be a potential means for accurate angle measurement in industrial applications.

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“…Compared to traditional electrical tilt sensors, fiber-optic sensors have many advantages, including immunity to electromagnetic interferences, remote sensing capability, high sensitivity and potential small size; as such, several tilt fiber sensors have been proposed in recent years [1]- [13]. Among fiber-optic tile sensors, those whose fibers have a tapered structure are generally regarded as having a more sensitive configuration [1]- [6], [10]- [13]. In 2011, a compact inclinometer sensor based on a fiber-taper Michelson interferometer was presented to demonstrate its effectiveness TABLE 1 Comparison of Material Properties [17] in sensing θ [1].…”

Section: Introductionmentioning

confidence: 99%

“…In the tapered region, several cladding modes were excited and then core-higher cladding mode interference occurred at the lead-out fiber when the lateral offset was controlled [4]. Fiber Mach-Zehnder interferometers based on the connection of two fiber tapers were proposed to investigate the extremely high sensitivity of interferometric-type tilt fiber sensors [5], [6]. The most well-known fiber tilt sensors are based on fiber Bragg gratings (FBGs), which have numerous benefits in terms of reliability and distributed capability [7], [9].…”

Section: Introductionmentioning

confidence: 99%

Tapered Polymer Fiber Inclinometers

et al. 2020

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This work proposes a novel, highly sensitive, and simple structure based on a tapered polymer as a tilt fiber sensor to sensitively measure tilt angles (θ).The fiber-optic tilt sensor consists of a tapered polymer and single-mode fibers (SMF), into which the tapered polymer to generate a bent in the sensor that is strongly correlated with θ. The used tapered polymer in the tilt sensing is the temperature (T) insensitive. It is further combined with a general fiber Bragg grating (FBG) as a temperature indicator for achieving simultaneous measurement of inclination (θ) and ambient T. The endface of the fiber is coated with a gold film to increase the light reflectivity and improve the measurement range. Experimental results show that when the sensor tilts, the reflective optical power changes significantly with high sensitivity, and the peak wavelength of FBG shifts when T varies. Both parameters can be measured simultaneously with good discrimination. An average tilt angle sensitivity of approximately 4.23 dB/deg. and a high resolution of 0.009 deg. are achieved in a θ variation from −6 to +6 deg. Simulations were performed and the numerical results were in good agreement with the experimental measurement.

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Angle sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber

Cited by 19 publications

References 12 publications

Dynamic Rotational Sensor Using Polymer Optical Fiber for Robot Movement Assessment Based on Intensity Variation

Dynamic Rotational Sensor Using Polymer Optical Fiber for Robot Movement Assessment Based on Intensity Variation

Plastic Optical Fiber Angle Sensor for 1-D and 2-D Based On Cascading Of TMBC

Tapered Polymer Fiber Inclinometers

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