Optical Torque Sensor Development

Horváth, P.; Nagy, Á.

doi:10.1007/978-3-642-05022-0_16

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…The development of embedded torque sensor, especially, a lightweight and highly reliable one, has been of great interest for decades [ 1 – 3 ]. Based on its measurement methods, the torque sensor can be classified as strain gauges [ 4 – 6 ], capacitive [ 7 – 9 ], piezoelectric [ 10 , 11 ], photoelectric [ 1 , 12 – 17 ], and so on [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

A Highly Reliable Embedded Optical Torque Sensor Based on Flexure Spring

Liu

Tian

Chen

et al. 2018

Applied Bionics and Biomechanics

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We propose a new highly reliable and lightweight embedded optical torque sensor for biomimetic robot arm enabling the torque measurement in joints, which can measure torque of the joint by detecting torsion of its elastic element (mechanical structure or flexure element). Flexure spring is introduced as the elastic element of the torque sensor in this paper. Because of its curve modeling, flexure spring is not inclined to be broken contrast to crossbeam structure, which is commonly used in torque sensor. Thanks to this structure, we can build a torque sensor as an extremely compact and highly reliable size. Six types of flexure spring are proposed to be used as the elastic element of the torque sensor in this paper, which have the potential for the requirements of measurement range and multidimensional detection. The optical electronic, less influenced by electromagnetic interferences, is selected to measure the torsion displacement of the flexure spring. The proposed design is analyzed, which can obtain the successful measurement of the torque with a load capacity of 1 Nm. One of the designed optical torque sensors is optimized by FEM. The calibration and experiment are conducted to ensure its feasibility and performance.

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