Tactile sensing for object identification based on hetero-core fiber optics

Yamazaki, Hiroshi; Watanabe, Kazuhiro; Sokolov, Mikhail

doi:10.1016/j.sna.2016.05.032

Cited by 21 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tactile sensors offer exciting possibilities for use in robotics, bioelectronics, human–machine interface, and smart clothing. − To mimic the human skin’s sensory ability, a great number of sensors capable of detecting pressure, , strain, , and temperature , have been developed based on capacitive, piezoelectric, triboelectric, resistive, and optical effect . Recently, with the rapid development of intelligent robots, hardness sensing has become an important function in tactile object recognition , and minimally invasive surgery (MIS), , which has been attracting increasing research interest.…”

Section: Introductionmentioning

confidence: 99%

Optical Micro/Nanofiber-Enabled Compact Tactile Sensor for Hardness Discrimination

Tang

Liu

Pan

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Optical micro/nanofibers (MNFs) can be applied for ultrasensitive tactile sensing with fast response and compact size, which are attractive for restoring tactile information in minimally invasive robotic surgery and tissue palpation. Herein, we present a compact tactile sensor (CTS) with a diameter of 1.5 mm enabled by an optical MNF. The CTS provides continuous readouts for high-fidelity transduction of touch and pressure stimuli into interpretable optical signals, which permit instantaneous sensing of contact and pressure with pressure-sensing sensitivity as high as 0.108 mN −1 and a resolution of 0.031 mN. Working in pressing mode, the CTS can discriminate the difference in the hardness of two poly(dimethylsiloxane) (PDMS) slats (with shore A of 36 and 40) directly, a hardness resolving ability even beyond the human hands. Benefitting from the fast response feature, the CTS can also be operated in either scanning or tapping mode, making it feasible for hardness identification by analyzing the shape of the response curve. As a proof of concept, the hardness discrimination of a pork liver and an adductor muscle was experimentally demonstrated. Such MNF-enabled compact tactile sensors may pave the way for hardness sensing in tissue palpation, surgical robotics, and object identification.

show abstract

Section: Introductionmentioning

confidence: 99%

Optical Micro/Nanofiber-Enabled Compact Tactile Sensor for Hardness Discrimination

Tang

Liu

Pan

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Compared to conventional fiber optic sensors, a hetero-core fiber optic sensor has been reported as an intensity-modulated macro-bending sensor composed of two single-mode fibers with different cores [26]. This sensor has been experimentally confirmed to have a bending loss that is sensitive to a gentle curvature radius of several tens of millimeters and thus could result in a cost-effective and power-saving measurement scheme by means of a light-emitting diode (LED) and a photodiode (PD) [27], [28]. It has thus far been demonstrated that this sensor can measure displacement on the order of several millimeters with a displacement-to-bending converter mechanism [29].…”

Section: Introductionmentioning

confidence: 99%

Optical Strain Gauge-Based on a Hetero-Core Fiber Macro-Bending Sensor

Yamazaki

Watanabe

2020

IEEE Sensors J.

Self Cite

View full text Add to dashboard Cite

This paper describes a novel approach for optical strain sensing based on a hetero-core fiber optic macro-bending sensor. A gauge substrate for the proposed sensor was designed to transduce the tensile and compression strain by changing to a gentle bending curvature on the fiber; thus, the heterocore fiber detects the strain on the substrate as the transmitted light lost. Because optical fibers perform as a flexible structure in a buckling scheme owing to their slenderness, the mechanical properties of the proposed sensor can be widely tuned by the shape and mechanical properties of the gauge substrate. Experiments demonstrated that the proposed strain gauge with a spring-structured substrate made of SUS304 showed a strain applied within ±3100 µε with a sensitivity of up to -9.14 × 10 -4 dB/ µε, and responded to temperature changes from 0°C to 60°C with -1.10 × 10 -2 dB/°C owing to the thermal expansion of the substrate. Furthermore, both the strain and temperature sensitivities are tunable by changing the geometrical parameters of the gauge substrate.

show abstract

“…Hetero-core fiber optic sensors consist of two single-mode fibers fusion-spliced with different core diameters to obtain high sensitivity to macro-bending on the processed fiber line [27]. Compared to conventional fiber optic sensors, the hetero-core fiber sensors have some attractive features such as a cost-effective measurement scheme by use of a light emitting diode (LED) and a photo diode (PD), and temperature independency on sensor responses [28].…”

Section: Introductionmentioning

confidence: 99%

Pendulum-Type Hetero-Core Fiber Optic Accelerometer for Low-Frequency Vibration Monitoring

Yamazaki

Kurose

Nishiyama

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract:In this paper, a novel pendulum-type accelerometer based on hetero-core fiber optics has 11 been proposed for structural health monitoring targeting large-scale civil infrastructures. Vibration 12 measurement is a non-destructive method for diagnosing the failure of structures by assessing 13 natural frequencies and other vibration patterns. The hetero-core fiber optic sensor utilized in the 14 proposed accelerometer can serve as a displacement sensor with robustness to temperature changes 15 in addition to immunity to electromagnetic interference and chemical corrosions. Thus the hetero-16 core sensor inside the accelerometer measures applied acceleration by detecting the rotation of an 17 internal pendulum. A series of experiments showed that the hetero-core fiber sensor linearly 18 responded to the rotation angle of the pendulum ranging within ±5°, and furthermore the proposed 19 accelerometer could reproduce the waveform of input vibration in a frequency band of several Hz 20 order. 21

show abstract

Tactile sensing for object identification based on hetero-core fiber optics

Cited by 21 publications

References 18 publications

Optical Micro/Nanofiber-Enabled Compact Tactile Sensor for Hardness Discrimination

Optical Micro/Nanofiber-Enabled Compact Tactile Sensor for Hardness Discrimination

Optical Strain Gauge-Based on a Hetero-Core Fiber Macro-Bending Sensor

Pendulum-Type Hetero-Core Fiber Optic Accelerometer for Low-Frequency Vibration Monitoring

Contact Info

Product

Resources

About