Flexible tactile sensor with 2D structure based on Fiber Bragg grating

Qi, Yajie; Qian, Muyun; Yang, Hongwei; Wei, Xinyuan

doi:10.1117/12.2605970

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Samuel et al [ 3 ] embedded the FBG in silicone to detect the pressure on the vertical surface and identified cracks greater than 0.3 mm through 3D mapping of fatigue cracks. Qian et al [ 18 ] designed and fabricated a distributed flexible tactile sensor based on two-dimensional fiber Bragg grating (FBG) sensing, which has high linearity and sensitivity. Qian et al [ 19 ] conducted an experimental study on material recognition of an FBG flexible tactile sensor applied to electronic skin, which can realize the perception of more modal information of objects in electronic skin.…”

Section: Introductionmentioning

confidence: 99%

Research on Finger Pressure Tactile Sensor with Square Hole Structure Based on Fiber Bragg Grating

Guan

Zhu

et al. 2023

Sensors

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Aiming at the problems of lateral force interference and non-uniform strain of robot fingers in the process of pressure tactile sensing, a flexible tactile sensor with a square hole structure based on fiber Bragg grating (FBG) is proposed in this paper. Firstly, the optimal embedding depth of the FBG in the sensor matrix model was determined by finite element simulation. Secondly, according to the size of the finger knuckle and the simulation analysis based on the pressure tactile sensor element for the robot finger, the square hole structure was designed, and the overall dimensions of the sensing element and size of the square hole were determined. Thirdly, the FBG was embedded in the polydimethylsiloxane (PDMS) elastic matrix to make a sensor model, and the tactile sensor was fabricated. Finally, the FBG pressure tactile sensing system platform was built by using optical fiber sensing technology, and the experiment of the FBG tactile sensor was completed through the sensing system platform. Experimental results show that the tactile sensor designed in this paper has good repeatability and creep resistance. The sensitivity is 8.85 pm/N, and the resolution is 0.2 N. The loading sensitivity based on the robot finger is 27.3 pm/N, the goodness of fit is 0.996, and the average value of interference in the sensing process is 7.63%, which is lower than the solid structure sensor. These results verify that the sensor can effectively reduce the lateral force interference and solve the problem of non-uniform strain and has high fit with fingers, which has a certain application value for the research of robot pressure tactile intelligent perception.

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Section: Introductionmentioning

confidence: 99%

Research on Finger Pressure Tactile Sensor with Square Hole Structure Based on Fiber Bragg Grating

Guan

Zhu

et al. 2023

Sensors

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“…First of all, optical fiber is made from silica, which has high sensitivity and accuracy, corrosion, and high temperature resistance. At the same time, its small size, light weight, small space occupation, and easy fabrication make it possible to be embedded without affecting the packaging material structure, which is conducive to the integration and miniaturization of sensing elements [ 14 ]. In addition, optical signal transmission can effectively ensure the stability of the transmitted signal [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Research of Robot Finger Sliding Tactile Sensor Based on FBG

Guan

Fu²,

Xu³

2022

Sensors

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Aiming at the problem of flexible sliding tactile sensing for the actual grasp of intelligent robot fingers, a double-layer sliding tactile sensor based on fiber Bragg grating (FBG) for robot fingers is proposed in this paper. Firstly, the optimal embedding depth range of FBG in the elastic matrix of polydimethylsiloxane (PDMS) was determined through finite element analysis and static detection experiments of finger tactile sensing. Secondly, the sensor structure is optimized and designed through the simulation and dynamic experiments of sliding sensing to determine the final array structure. Thirdly, the sensing array is actually pasted on the surface of the robot finger and the sensing characteristics testing platform is built to test and analyze the basic performance of the sliding tactile sensor. Then, the sensor array is actually attached to the finger surface of the robot and the sensing characteristics testing platform is built to experiment and analyze the basic performance of the sliding tactile sensor. Finally, a sliding tactile sensing experiment of robot finger grasping is conducted. The experimental results show that the sliding tactile sensor designed in this paper has good repeatability and creep resistance, with sensitivities of 12.4 pm/N, 11.6 pm/N, and 14.5 pm/N, respectively, and the overall deviation is controlled within 5 pm. Meanwhile, it can effectively sense the signals of the robot fingers during static contact and sliding. The sensor has a high degree of fit with the robot finger structure, and has certain application value for the perception of sliding tactile signals in the object grasping of intelligent robot objects.

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A positioning-functionalized force sensor for two-dimensional planes based on a sparse fiber Bragg grating array

et al. 2023

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Flexible tactile sensor with 2D structure based on Fiber Bragg grating

Cited by 3 publications

References 5 publications

Research on Finger Pressure Tactile Sensor with Square Hole Structure Based on Fiber Bragg Grating

Research on Finger Pressure Tactile Sensor with Square Hole Structure Based on Fiber Bragg Grating

Design and Experimental Research of Robot Finger Sliding Tactile Sensor Based on FBG

A positioning-functionalized force sensor for two-dimensional planes based on a sparse fiber Bragg grating array

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