scholarly journals Initial design and analysis of a capacitive sensor for shear and normal force measurement

2003 ◽  
Author(s):  
J.L. Novak
Keyword(s):  
Normal Force ◽  
Force Measurement ◽  
Capacitive Sensor ◽  
Initial Design

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.

The Study on the Ultrasonic Nanomachining of Au/Ti Thin Film by Atomic Force Microscopy

2014 ◽  
Vol 627 ◽  
pp. 35-39
Author(s):  
Jen Ching Huang ◽  
Ho Chang ◽  
Yong Chin You ◽  
Hui Ti Ling
Keyword(s):  
Thin Film ◽  
Atomic Force Microscopy ◽  
Quartz Crystal ◽  
Normal Force ◽  
Force Measurement ◽  
Great Influence ◽  
Measurement Model ◽  
Cutting Depth ◽  
Force Microscopy ◽  
Atomic Force

This study focused on the ultrasonic nanomachining by atomic force microscopy (AFM) to understand the phenomena of the ultrasonic nanomachining. The workpiece is an Au/Ti thin film and coated on the quartz crystal resonator (QCR). The ultrasound vibration of workpiece is carried out by used the Quartz crystal microbalance (QCM). And a normal force measurement model was built by force curve measurements in ultrasound vibration environment. The influence of different experimental parameters can be studied such as normal force and repeat number on the cutting depth and chip stacking. After the experiments, it can be found that the ultrasonic nanomachining by AFM is possessed great influence on the cutting depth.

scholarly journals A Disturbance Suppression Micro-Newton Force Sensor Based on Shadow Method

2022 ◽  
Author(s):  
Yong Yang ◽  
Meirong Zhao ◽  
Dantong Li ◽  
Moran Tao ◽  
Chunyuan Zhu ◽  
...  
Keyword(s):  
Normal Force ◽  
Vibrational Energy ◽  
Force Measurement ◽  
Damping Ratio ◽  
Force Sensor ◽  
Measurement Range ◽  
Complex Environments ◽  
Shadow Method ◽  
Reliable Measurement ◽  
Flat Punch

<div>The precision of micro-force measurement is determined by the sensitivity of force sensors and the magnitude of environmental disturbances. Damping, a process that converts vibrational energy into heat, is one of the most effective methods of suppressing disturbances. Inspired by the shadow formed at a pond when water striders walked on the water, a bionic viscoelastic-polymer micro-force (VPMF) sensor with a high damping ratio based on the shadow method was developed. In the VPMF sensor, the surface of the polymer was deformed by the contact of a cylindrical flat punch when the sensor was subjected to a normal force. A shadow with a bright edge was formed due to the refraction that parallel light went through the deformed surface. The force was in proportion to the change of the shadow diameter. The sensor optimal sensitivity was 2.15 μN/pixel and the measurement range was 0.981 mN. The damping ratio of the VPMF sensor was 0.22 on account of viscoelasticity, which could suppress disturbances effectively. The VPMF sensor could reduce the influence of disturbances by about 96.23% compared to the cantilever. The present study suggests that the VPMF sensor is hopefully applied to the reliable measurement of micro force under complex environments.</div>

Monitoring of Tool Wear Distribution With Cutting Force Measurement in Drilling

2020 ◽  
Author(s):  
Shoichi Tamura ◽  
Kodai Sekigawa ◽  
Takashi Matsumura
Keyword(s):  
Tool Wear ◽  
Cutting Force ◽  
Normal Force ◽  
Flank Wear ◽  
Force Measurement ◽  
Cutting Edge ◽  
Drilling Process ◽  
Machining Processes ◽  
Tool Performance ◽  
Edge Damage

Abstract In the automated machining processes, tool damage should be managed to assure product qualities, promote machine tool performance and reduce production time and cost. In drilling process, the cutting process changes along the cutting edge; and the tool wear is not uniform. This paper presents a monitoring of the tool wear distribution with measuring the cutting force in drilling with a twist drill. The cutting force increases with the cutting area in the edge penetration into workpiece in drilling. In the proposed approach, the cutting edges are divided into small discrete segments. The increasing rate of the cutting force at a segment is associated with the normal forces loaded at the cutting area. The normal force distributions, then, are estimated for the cutting edge damage. The widths of flank wear lands along the cutting edge is monitored based on the increase of the normal force distribution. The cutting tests were conducted to validate the presented approach with measuring the cutting force in drilling of carbon steel. The presented approach estimates the tool wear distribution on the edge with the cutting time. The average stress distribution loaded on the flank wear land is also estimated in the regression analysis.

Anomalies in the normal force measurement when using a force rebalance transducer

1996 ◽  
Vol 40 (3) ◽  
pp. 323-334 ◽  
Author(s):  
Jan M. Niemiec ◽  
Jean‐Jacques Pesce ◽  
Gregory B. McKenna ◽  
Stephen Skocypec ◽  
Ronald F. Garritano
Keyword(s):  
Normal Force ◽  
Force Measurement
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