scholarly journals Capacitive Tactile Sensor with Concentric-Shape Electrodes for Three-Axial Force Measurement

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 708 ◽  
Author(s):  
Min-Sheng Suen ◽  
Rongshun Chen
Keyword(s):  
Axial Force ◽  
Bottom Electrode ◽  
Normal Force ◽  
Force Measurement ◽  
Tactile Sensor ◽  
Capacitive Sensor ◽  
Wearable Devices ◽  
Capacitive Sensing ◽  
Electrode Shape ◽  
Spacer Layer

In this paper, a novel capacitive tactile sensing device has proposed and demonstrated to solve coupling problem within the normal force and shear force by the unique design of electrode shape. In addition, the tactile sensor was added in the measuring capability of torsion sensing compared with traditional capacitive sensor. The perceptive unit of tactile sensor, which was consist of five sensing electrodes to detect three-axial force. The complete tactile sensor composed of a top electrode, a bottom electrode, and a spacer layer. Each capacitive sensing unit comprised a pair of the concentric-shape but different size electrodes (top electrode and bottom electrode). In the future, the proposed tactile sensor can be utilized in the wearable devices, flexible interface, and bionic robotic skins.

Active Touch Sensing by Multi-axial Force Measurement Using High-Resolution Tactile Sensor with Microcantilevers

2014 ◽  
Vol 134 (3) ◽  
pp. 58-63 ◽  
Author(s):  
Hokuto Yokoyama ◽  
Takeshi Kanashima ◽  
Masanori Okuyama ◽  
Takashi Abe ◽  
Haruo Noma ◽  
...  
Keyword(s):  
High Resolution ◽  
Axial Force ◽  
Force Measurement ◽  
Tactile Sensor ◽  
Active Touch

Modeling and Analysis of a Flexible Capacitive Tactile Sensor Array for Normal Force Measurement

2014 ◽  
Vol 14 (11) ◽  
pp. 4095-4103 ◽  
Author(s):  
Guanhao Liang ◽  
Deqing Mei ◽  
Yancheng Wang ◽  
Zichen Chen
Keyword(s):  
Sensor Array ◽  
Normal Force ◽  
Force Measurement ◽  
Tactile Sensor ◽  
Modeling And Analysis ◽  
Tactile Sensor Array

scholarly journals Review: Sensors for Biosignal/Health Monitoring in Electronic Skin

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2478
Author(s):  
Hyeon Seok Oh ◽  
Chung Hyeon Lee ◽  
Na Kyoung Kim ◽  
Taechang An ◽  
Geon Hwee Kim
Keyword(s):  
High Performance ◽  
Active Component ◽  
Tactile Sensor ◽  
Wearable Devices ◽  
Advanced Technology ◽  
Electronic Skin ◽  
Points Of View ◽  
External Stimuli ◽  
Flexible Component

Skin is the largest sensory organ and receives information from external stimuli. Human body signals have been monitored using wearable devices, which are gradually being replaced by electronic skin (E-skin). We assessed the basic technologies from two points of view: sensing mechanism and material. Firstly, E-skins were fabricated using a tactile sensor. Secondly, E-skin sensors were composed of an active component performing actual functions and a flexible component that served as a substrate. Based on the above fabrication processes, the technologies that need more development were introduced. All of these techniques, which achieve high performance in different ways, are covered briefly in this paper. We expect that patients’ quality of life can be improved by the application of E-skin devices, which represent an applied advanced technology for real-time bio- and health signal monitoring. The advanced E-skins are convenient and suitable to be applied in the fields of medicine, military and environmental monitoring.

scholarly journals Characteristics of Optical Silicone Tactile Sensor

2015 ◽  
Vol 76 (1) ◽  
Author(s):  
Nurul Fathiah Mohamed Rosli ◽  
Muhammad Azmi Ayub ◽  
Roseleena Jaafan
Keyword(s):  
Endoscopic Surgery ◽  
Biomedical Applications ◽  
Force Measurement ◽  
Research Work ◽  
Surface Hardness ◽  
Tactile Sensor ◽  
Computer Algorithm ◽  
Anal Ysis ◽  
Area And Perimeter ◽  
Images Processing

The main objective of this research work is to anal yze the characteristics of a newly developed optical tactile sensor for sensing surface hardness. Many optical tactile sensors are bulky in size and lack of dexterity for biomedical applications. Therefore, this tactile sensor is design relative small in size and flexible for easier insertion in endoscopic surgery application. The characteristics of the tactile sensor are calibrated with respect to changes in the diameter, area and perimeter of a silicon tactile sensor subjected to normal forces applied at the point of interaction. A surface exploration computer algorithm to obtain the sensing information was developed to analyse the characteristic of the optical tactile sensor. The overall image anal ysis technique involves the following main stages: image acquisition (capturing of images), processing (thresholding, noise filtering and boundary detection ) and evaluation (force measurement). The measured forces were then compared to the actual forces to determine the accuracy of the tactile sensor’s characteristics. The results showed tluit the sensing characteristic with respect to changes in perimeter of the tactile sensor is more accurate compared to the other sensing characteristics. The outcomes of this research shows that the functionality of the developed new image anal ysis computer algorithm coupled with the silicone tactile sensor is suitable for biomedical applications such as in endoscopic surgery for measurement of tissue softness.

A Flexible Tactile Sensor Based on Porous Graphene Sponge for Tiny Force Measurement

2018 ◽  
Author(s):  
Lingfeng Zhu ◽  
Yancheng Wang ◽  
Xin Wu ◽  
Deqing Mei
Keyword(s):  
Force Measurement ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Tactile Sensors ◽  
Force Detection ◽  
Pressure Sensing ◽  
Porous Graphene ◽  
Graphene Sponge ◽  
Healthcare Monitoring ◽  
Working Principle

Flexible tactile sensors have been utilized for epidermal pressure sensing, motion detecting, and healthcare monitoring in robotic and biomedical applications. This paper develops a novel piezoresistive flexible tactile sensor based on porous graphene sponges. The structural design, working principle, and fabrication method of the tactile sensor are presented. The developed tactile sensor has 3 × 3 sensing units and has a spatial resolution of 3.5 mm. Then, experimental setup and characterization of this tactile sensor are conducted. Results indicated that the developed flexible tactile sensor has good linearity and features two sensitivities of 2.08 V/N and 0.68 V/N. The high sensitivity can be used for tiny force detection. Human body wearing experiments demonstrated that this sensor can be used for distributed force sensing when the hand stretches and clenches. Thus the developed tactile sensor may have great potential in the applications of intelligent robotics and healthcare monitoring.

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