High-sensitivity flexible tri-axial capacitive tactile sensor for object grab sensing

Xu, Taipu; Zhu, Hao; Dai, Shengping; Zhong, Yan; Zhang, Zhongqiang; Chen, Si; Cheng, Guanggui; Ding, Jianning

doi:10.1016/j.measurement.2022.111876

Cited by 14 publications

(2 citation statements)

References 25 publications

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“…The average error of F is 7.48%. The three-dimensional force transducer studied by Xu et al [21] adopts a 15 × 15 mm PDMS bump, and the comprehensive error of three-dimensional force detection is 10.4% ± 5.5%. Furthermore, in a three-dimensional force sensor with a double hemisphere interlocking structure [22], the contact deformation between the top and bottom hemispheres is used to adjust the film resistance of graphene, polyethylene oxide, and deionized water and obtain the magnitude and direction of the applied force.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional force detection using PVDF and room temperature-vulcanized silicone rubber layers

Wang¹,

Zhang²,

An³

et al. 2023

Meas. Sci. Technol.

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Three-dimensional force perception plays an extremely important role in human-computer interaction. The main objective of the present study is to propose a three-dimensional force detection sensor using room temperature-vulcanized (RTV) silicone rubber, polyvinylidene fluoride (PVDF), and a silver coating layer. The sensor was designed in a cylindrical structure to detect the tangential force. The performed analyses reveal that the silver coating layer improves the surface charge output of the PVDF film. The output peak voltage of the sensing unit is 271.7 % higher than that of the single PVDF film. The sensor has a response time of 40 ms. It is found that the angle detection error of the sensor along horizontal and vertical directions is less than 2.79° and 0.88°,respectively. In order to evaluate the performance of the proposed sensor, it is fixed on the mechanical hand to perform grasping and sliding tests. The tested results show that the proposed sensor can effectively identify the weight and slip of the object, and can be used in the field of manipulator clamping control.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional force detection using PVDF and room temperature-vulcanized silicone rubber layers

Wang¹,

Zhang²,

An³

et al. 2023

Meas. Sci. Technol.

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show abstract

“…With the continuous development of artificial intelligence and the internet of things in the past few years, flexible tactile sensors have attracted many scholars in diverse industries [1,2]. More specifically, significant achievements have been obtained in a series of cutting-edge equipment such as intelligent manipulator [3], healthcare monitoring [4], and variation between the two electrode plates and the contact area between the electrode and the dielectric layer [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigating capacitive flexible tactile sensor with a wide measuring range using PVDF and conductive sponge

Dong

Yao

Wang

2023

J. Micromech. Microeng.

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Flexible tactile sensors have important application value in the field of artificial intelligence and Internet of Things. At present, it is a great challenge for tactile sensors to maintain high sensitivity and stability in a large pressure range. This article proposes a flexible capacitive tactile sensor with high sensitivity and large measuring range, which has a sandwich structure. The purpose of this paper is to determine the relationship between the thickness, surface microstructure, sensitivity, and sensing range of PVDF films. The sensor uses conductive sponge with a microstructure surface and an ultra-thin PVDF film as the electrode and dielectric layer, respectively, and provides a comprehensive study in terms of sensor design, theoretical calculation, computer simulation and applications. The minimum detection limit of the sensor are tested by sound vibration, needle blowing, and human physiological signals. It has been shown that the thicker the PVDF film, the lower the sensitivity and the wider the sensing range. The proposed sensor can accurately identify physiological signals such as respiration, pulse and swallowing, and can perceive the softness, hardness and weight of the object as well as identifying the grasping posture. Moreover, the sensor has the characteristics of short response time, good recoverability and stability.

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Tactile recognition technology based on Multi-channel fiber optical sensing system

et al. 2023

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High-sensitivity flexible tri-axial capacitive tactile sensor for object grab sensing

Cited by 14 publications

References 25 publications

Three-dimensional force detection using PVDF and room temperature-vulcanized silicone rubber layers

Three-dimensional force detection using PVDF and room temperature-vulcanized silicone rubber layers

Investigating capacitive flexible tactile sensor with a wide measuring range using PVDF and conductive sponge

Tactile recognition technology based on Multi-channel fiber optical sensing system

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