A Novel Fiber Optic Tactile Array Sensor

Schoenwald, J.S.; Thiele, A.W.; Gjellum, D.

doi:10.1117/12.937509

Cited by 8 publications

(4 citation statements)

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“…In contrast to [ 23 ], not the losses were evaluated, but the coupling between two crossing fibres. Similar concepts had already been proposed in [ 19 , 20 ] and also by Schoenwald et al [ 21 ], which relied on two different layers of crossing fibres. Rothmaier et al presented a textile integration of this pressure sensor [ 25 ], but none of the aforementioned methods were fully compatible with textile technology nor did they provide simultaneous sensing at different locations.…”

Section: Introductionmentioning

confidence: 73%

“…There have been several proposals for optical force sensors using polymer optical fibres (POF), which are more robust. Initially, POF pressure sensor technology was—and still is—used in the field of robotics [ 19 , 20 , 21 , 22 ]. In [ 23 ] for instance, the losses induced by macro bending in a POF arrays have been used as sensor signal.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors

Bunge

Kallweit

Colakoglu

et al. 2021

Sensors

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The force-enhanced light coupling between two optical fibres is investigated for the application in a pressure or force sensor, which can be arranged into arrays and integrated into textile surfaces. The optical coupling mechanisms such as the influence of the applied force, the losses at the coupling point and the angular alignment of the two fibres are studied experimentally and numerically. The results reveal that most of the losses occur at the deformation of the pump fibre. Only a small percentage of the cross-coupled light from the pump fibre is actually captured by the probe fibre. Thus, the coupling and therefore the sensor signal can be strongly increased by a proper crossing angle between the fibres, which lead to a coupling efficiency of 3%, a sensitivity improvement of more than 20 dB compared to the orthogonal alignment of the two fibres.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors

Bunge

Kallweit

Colakoglu

et al. 2021

Sensors

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“…As a result, optical sensors provide an excellent alternative to electrical ones (7,(23)(24)(25)(26)(27)(28). Optical skins have used light loss through bent fibers (29)(30)(31), fiber Bragg gratings (24), and frustrated total internal reflection (32)(33)(34)(35) to measure planar shape change but have not been used to directly measure complex, volumetric deformation due to their two-dimensional (2D) fabrication limitations. Stretchable light guides sensitive to tensile strain and external forces through Beer's law can be easily embedded into a volume but lack the spatial differentiation of skins (7,23,(25)(26)(27)(28).…”

Section: Introductionmentioning

confidence: 99%

Optical lace for synthetic afferent neural networks

Mishra

Bai

et al. 2019

Sci. Robot.

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Whereas vision dominates sensing in robots, animals with limited vision deftly navigate their environment using other forms of perception, such as touch. Efforts have been made to apply artificial skins with tactile sensing to robots for similarly sophisticated mobile and manipulative skills. The ability to functionally mimic the afferent sensory neural network, required for distributed sensing and communication networks throughout the body, is still missing. This limitation is partially due to the lack of cointegration of the mechanosensors in the body of the robot. Here, lacings of stretchable optical fibers distributed throughout 3D-printed elastomer frameworks created a cointegrated body, sensing, and communication network. This soft, functional structure could localize deformation with submillimeter positional accuracy (error of 0.71 millimeter) and sub-Newton force resolution (~0.3 newton).

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“…These optical measurements are indcpendcnt of temperature and arc applied to track a flexible link robot [6]. The high resolution and flcxiblc nature of optical fibcrs are uscd to enhance rcliability of tactilc arrays [7], [8]. The scnsor in [9] uses optical fibcrs to conncct selected points on thc fingertip surface to a PSD for contact position identification.…”

Section: Introductionmentioning

confidence: 99%

Dynamic tactile information sensing for dextrous fingers utilizing displacement parameters of a suspension shell

Okada

Inamura

Suzuki

Proceedings of 1994 IEEE International Conference on MFI '94. Multisensor Fusion and Integration for Intelligent Systems

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This paper describes an optical displacement measurement method to develop tactile scnsors based on a suspension-shell mechanism for dextrous fingers. To express position and orientation of the suspcnsion-shell, three parameters of angular displacements and two parameters of linear displacements are introduced. Besides, a method for measuring thcse five parameters using inverse optical projection is proposed. Only the longitudinal force of the springs suspending the shcll coaxially around the rigid finger body is considered. Thus, the dynamic analysis of balance becomes very simple. Algebraic formulations for estimating magnitude, direction and position of the external force are shown. Also, simulations to verify the proposed proccdures are made.

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A Novel Fiber Optic Tactile Array Sensor

Cited by 8 publications

References 0 publications

Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors

Analysis of Fibre Cross-Coupling Mechanisms in Fibre-Optical Force Sensors

Optical lace for synthetic afferent neural networks

Dynamic tactile information sensing for dextrous fingers utilizing displacement parameters of a suspension shell

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