A fiber-optic voltage sensor based on macrobending structure

Wang, Pengfei; Semenova, Yuliya; Wu, Qiang; Farrell, Gerald

doi:10.1016/j.optlastec.2011.01.003

Cited by 36 publications

(11 citation statements)

References 15 publications

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“…The macrobending of an optical fibre connected to a light source can occur at multiple locations along the length of the fibre and lead to light loss that can be measured using a light detector [25]. Macrobend stretch sensors were proposed different configurations including semicircular (half turn), circular (one turn), and figure-of-eight [26] and were employed in a multi-layer configuration for plantar pressure and shear sensing [27] and for the development of a voltage sensor [28]. In this paper, we investigate the macrobendbased sensing approach for developing low profile stretch sensors.…”

Section: Low Profile Stretch Sensor For Soft Wearable Roboticsmentioning

confidence: 99%

Low profile stretch sensor for soft wearable robotics

Sareh

Noh

2018

2018 IEEE International Conference on Soft Robotics (RoboSoft)

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this paper presents a low profile stretch sensor for integration into soft structures, robots and wearables. The sensor mechanism uses a single piece of highly flexible and light weight optical fibre and is based on the notion that bending an optical fibre modulates the intensity of the light transmitted through the fibre, a technique often referred as macrobending light loss. In this arrangement, the optical fibre originates from sensor's electronic unit, passes through a stretchable encasing structure in a macrobend pattern, and then loop back to the same unit resulting in a simplified electrical and optical design; the closed optical loop allows for no electronics at one end of the sensor making it safe for human robotics applications, and no optical interference with the external environment eliminating the need for complex conditioning circuitries. Of particular interest of the soft robotics community, the ability of this custom macrobend stretch sensor to flexibly adapt its configuration allows preserving the inherent softness and compliance of the robot which it is installed on. Our experimental results indicate that the optical fibre's bending radius is the dominant design parameter for sufficiently complex patterns, a finding that can facilitate generalisation of the sensing methods across different scales. The measurement performance of the mechanism and its impact on the stiffness of the encasing structure is benchmarked against a custom calibration and testing system. I.

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Section: Low Profile Stretch Sensor For Soft Wearable Roboticsmentioning

confidence: 99%

Low profile stretch sensor for soft wearable robotics

Sareh

Noh

2018

2018 IEEE International Conference on Soft Robotics (RoboSoft)

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“…When exerting E on the PZT, the strain in the polarized direction can be expressed as

ε_{normale} = d_{33} U / M

where d 33 is the strain coefficient, M is the distance between the electrodes, and U is the drive voltage .…”

Section: Principlesmentioning

confidence: 99%

A motor's rotational angle sensor based on fiber Bragg grating

Cheng

Hung

Liu

2014

Micro & Optical Tech Letters

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This article develops an optical fiber sensor using a fiber Bragg grating (FBG) and a piezo‐electrical transducer (PZT) to measure a motor's rotational angle. By mounting an FBG on a PZT bar, a dynamic strain simulator was constructed. The equivalent voltage produced by the potentiometer caused by the rotational angle of a motor's shaft was applied to the PZT and converted to the dynamic variation of the FBG Bragg wavelength. The motor's rotational angle was attained by measuring the changing value of the wavelength. The experimental results demonstrate that a high sensitivity of 0.459 pm/deg is achieved over a range of 0° to 270°. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1449–1452, 2014

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“…When exerting E on the PZT, the strain in the polarized direction can be expressed as where d 33 is the strain coefficient, M is the distance between the electrodes, and U is the drive voltage [14–18].…”

Section: Principlesmentioning

confidence: 99%

“…where d 33 is the strain coefficient, M is the distance between the electrodes, and U is the drive voltage [14][15][16][17][18].…”

Section: Principlesmentioning

confidence: 99%

A reactive power sensor based on fiber Bragg grating and a piezo‐electric transducer

Cheng

Liu

2013

Micro & Optical Tech Letters

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This article develops an optical fiber sensor using a fiber Bragg grating (FBG) and a piezo‐electrical transducer (PZT) to measure reactive power. By mounting an FBG on a PZT bar, a dynamic strain simulator was constructed. The equivalent voltage produced by reactive power applied to the PZT was converted to the dynamic variation of the FBG Bragg wavelength. The reactive power was attained by measuring the changing value of the wavelength. Thus, the sensor can be used to measure reactive power without the use of a traditional power meter. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1692–1696, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27617

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A fiber-optic voltage sensor based on macrobending structure

Cited by 36 publications

References 15 publications

Low profile stretch sensor for soft wearable robotics

Low profile stretch sensor for soft wearable robotics

A motor's rotational angle sensor based on fiber Bragg grating

A reactive power sensor based on fiber Bragg grating and a piezo‐electric transducer

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