scholarly journals Evaluation of thin, flexible sensors for time-resolved grip force measurement

2007 ◽  
Vol 221 (12) ◽  
pp. 1687-1699 ◽  
Author(s):  
E R Komi ◽  
J R Roberts ◽  
S J Rothberg
Keyword(s):  
Shear Force ◽  
Grip Force ◽  
Force Measurement ◽  
Real Life ◽  
Force Sensor ◽  
Ease Of Use ◽  
Time Resolved ◽  
Flexible Sensors ◽  
Sensor Performance ◽  
Dynamic Accuracy

Three types of thin, flexible force sensor were studied under a variety of loading conditions to determine their suitability for measuring grip force. Static accuracy, hysteresis, repeatability, and drift errors were established, the effects of shear force and surface curvature were considered, and dynamic accuracy and drift were measured. Novel tests were developed to consider dynamic accuracy and sensitivity to shear loadings. Additionally, three sensors were evaluated in a real-life gripping scenario, measuring grip force during a golf shot. Comments are made on sensor performance, ease of use, and durability.

scholarly journals A Force Measurement Device Using Optical Fiber for Surgical Tools - Basic Concept and Implementation -

2011 ◽  
Vol 23 (1) ◽  
pp. 94-104 ◽  
Author(s):  
Kazuhiro Taniguchi ◽  
◽  
Etsuko Kobayashi ◽  
Sanghyun Joung ◽  
Minoru Ono ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Temperature Compensation ◽  
Force Measurement ◽  
Force Sensor ◽  
Torsional Stress ◽  
Sensor Performance ◽  
Fbg Sensor ◽  
Measurement Resolution ◽  
Measurement Results ◽  
Sensor Measurement

The system proposed here measures compressive and tensile stress working longitudinally in an endoscopic surgical-assistant robot tool for the palpation of lung cancer. The force sensor is a safe, sanitary Fiber Bragg Grating (FBG) strain sensor. Such sensors are suitable for medical applications but have the disadvantage of force measurement being adversely affected by temperature. An FBG sensor on a workpiece is strained simultaneously with the workpiece to measure force based on the strain degree. A workpiece with a high Young’s modulus decrease strain, compromising sensor measurement resolution. Our proposal, discussed and evaluated in the sections that follow, solves these problems of temperature compensation and measurement resolution. The trial device we fabricated amplifies strain to enhance measurement resolution. We measured FBG sensor performance by applying compressive and tensile stress longitudinally on the trial device and determined, based on measurement results, that strain was amplified. We also confirmed that FBG sensormeasurement corresponded linearly to the compressive and tensile stress of 0-3 N. The trial device we fabricated filtered bending and torsional stress – excluding tensile and compressive stress – applied to the workpiece and confirmed device effectiveness in suppressing bending and torsional stress. Our trial device for temperature compensation solves the problems of the FBG sensor within a small, lightweight package.

A PCB BASED CAPACITIVE SHEAR FORCE SENSOR DEVELOPED FOR ROBOTIC GRIPPER APPLICATION

2013 ◽  
Vol 24 ◽  
pp. 1360027
Author(s):  
JIAN-LIN HUANG ◽  
SHENG-JUI CHEN ◽  
GWO-JEN WU ◽  
CHUNG-LIN WU ◽  
SHEAU-SHI PAN
Keyword(s):  
Shear Force ◽  
Degrees Of Freedom ◽  
Printed Circuit Board ◽  
High Sensitivity ◽  
Force Sensor ◽  
Circuit Board ◽  
Optical Interferometer ◽  
Robotic Arms ◽  
Printed Circuit ◽  
Sensor Performance

The shear force sensor is one of the key elements in future robotic industry, it is of great importance in applications where robotic arms are required to delicately interact with objects to be handled. In this paper, we present the development of a capacitive shear force capable of sensing shear forces in two degrees of freedom. The fabrication of the sensor is based on the printed circuit board (PCB) fabrication process, a well-known and mature technology. We adopt the capacitance sensing scheme for its high sensitivity and easy implementation. For sensor characterization, we used a force gauge and an optical interferometer to measure sensor's parameters including its sensing coefficient and resolution. The dimension of our prototype shear force sensor including the metal housing is 26 mm×13 mm×58 mm suitable for the integration with commercial robotic grippers. For sensor performance, we achieved a shear force sensing coefficient of 23.3 fF/N and a resolution of smaller than 5mN.

scholarly journals VirtualCPR: Virtual Reality Mobile Application for Training in Cardiopulmonary Resuscitation Techniques

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2504
Author(s):  
Francisco Javier García Fierros ◽  
Jesús Jaime Moreno Escobar ◽  
Gabriel Sepúlveda Cervantes ◽  
Oswaldo Morales Matamoros ◽  
Ricardo Tejeida Padilla
Keyword(s):  
Virtual Reality ◽  
Cardiopulmonary Resuscitation ◽  
Mobile Application ◽  
Force Measurement ◽  
Heart Diseases ◽  
Medical Knowledge ◽  
Public Health Problem ◽  
Force Sensor ◽  
Previous Training ◽  
Color Indicator

Deaths due to heart diseases are a leading cause of death in Mexico. Cardiovascular diseases are considered a public health problem because they produce cardiorespiratory arrests. During an arrest, cardiac and/or respiratory activity stops. A cardiorespiratory arrest is rapidly fatal without a quick and efficient intervention. As a response to this problem, the VirtualCPR system was designed in the present work. VirtualCPR is a mobile virtual reality application to support learning and practicing of basic techniques of cardiopulmonary resuscitation (CPR) for experts or non-experts in CPR. VirtualCPR implements an interactive virtual scenario with the user, which is visible by means of employment of virtual reality lenses. User’s interactions, with our proposal, are by a portable force sensor for integration with training mannequins, whose development is based on an application for the Android platform. Furthermore, this proposal integrates medical knowledge in first aid, related to the basic CPR for adults using only the hands, as well as technological knowledge, related to development of simulations on a mobile virtual reality platform by three main processes: (i) force measurement and conversion, (ii) data transmission and (iii) simulation of a virtual scenario. An experiment by means of a multifactorial analysis of variance was designed considering four factors for a CPR session: (i) previous training in CPR, (ii) frequency of compressions, (iii) presence of auditory suggestions and (iv) presence of color indicator. Our findings point out that the more previous training in CPR a user of the VirtualCPR system has, the greater the percentage of correct compressions obtained from a virtual CPR session. Setting the rate to 100 or 150 compressions per minute, turning on or off the auditory suggestions and turning the color indicator on or off during the session have no significant effect on the results obtained by the user.

scholarly journals Is the grip force measurement suitable for assessing overall strength regardless of age and gender?

Measurement ◽  
2021 ◽  
Vol 176 ◽  
pp. 109093
Author(s):  
Danuta Roman-Liu ◽  
Tomasz Tokarski ◽  
Joanna Mazur-Różycka
Keyword(s):  
Grip Force ◽  
Force Measurement ◽  
Age And Gender ◽  
And Gender

scholarly journals Static Force Measurement Using Piezoelectric Sensors

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Kyungrim Kim ◽  
Jinwook Kim ◽  
Xiaoning Jiang ◽  
Taeyang Kim
Keyword(s):  
Surface Charge ◽  
Piezoelectric Effect ◽  
Force Measurement ◽  
Piezoelectric Materials ◽  
Force Sensor ◽  
Piezoelectric Sensors ◽  
Force Sensing ◽  
Static Force ◽  
Sensing Applications ◽  
Direct Piezoelectric Effect

In force measurement applications, a piezoelectric force sensor is one of the most popular sensors due to its advantages of low cost, linear response, and high sensitivity. Piezoelectric sensors effectively convert dynamic forces to electrical signals by the direct piezoelectric effect, but their use has been limited in measuring static forces due to the easily neutralized surface charge. To overcome this shortcoming, several static (either pure static or quasistatic) force sensing techniques using piezoelectric materials have been developed utilizing several unique parameters rather than just the surface charge produced by an applied force. The parameters for static force measurement include the resonance frequency, electrical impedance, decay time constant, and capacitance. In this review, we discuss the detailed mechanism of these piezoelectric-type, static force sensing methods that use more than the direct piezoelectric effect. We also highlight the challenges and potentials of each method for static force sensing applications.

scholarly journals Fabrication of A Shear Force Sensor for The Evaluation of The Effects of Skin Deformation on Pressure Ulcer Formation

2000 ◽  
Vol 120 (8-9) ◽  
pp. 1092-1097
Author(s):  
Seiichi Suzuki ◽  
Fukuko Ohnuma ◽  
Chikako Yanami ◽  
Tomoko Murayama ◽  
Makoto Akiyoshi
Keyword(s):  
Pressure Ulcer ◽  
Shear Force ◽  
Force Sensor ◽  
Ulcer Formation ◽  
Skin Deformation

A piezoresistive normal and shear force sensor using liquid metal alloy as gauge material

2012 ◽  
Author(s):  
Xiaomei Shi ◽  
Ching-Hsiang Cheng ◽  
Chen Chao ◽  
Like Wang ◽  
Yongping Zheng
Keyword(s):  
Liquid Metal ◽  
Shear Force ◽  
Force Sensor ◽  
Metal Alloy ◽  
Liquid Metal Alloy

Fingertip Force Measurement of GloveMAP by Using a Flexi Force Sensor

2015 ◽  
Vol 780 ◽  
pp. 1-5
Author(s):  
Khairunizam Wan ◽  
H.E. Nabilah ◽  
Nor Farahiya ◽  
M. Hazwan Ali ◽  
Rashidah Suhaimi ◽  
...  
Keyword(s):  
Force Measurement ◽  
Current Trend ◽  
Force Sensor ◽  
Force Sensors ◽  
Gaussian Filter ◽  
Natural Interaction ◽  
Fingertip Force ◽  
Grasping Force ◽  
Interface Devices ◽  
A Current

Modernization of human technologies overtime results the need of more freedom technology likes the use of natural interaction to replace a current trend interface devices such as joysticks, mice, keyboards and other related output devices. Dataglove is one of the interface devices that could serve a natural interaction between user and computers. In this paper, a dataglove called GloveMAP is introduced which has the capability of measuring fingertip force. The flexible force sensors are attached to the fingers location of the glove. Several object grasping experiments are conducted and the grasping force signals are measured. A Gaussian filter is introduced to smoothen the acquired force signals.

scholarly journals A force sensor that converts fluorescence signal into force measurement utilizing short looped DNA

2018 ◽  
Vol 121 ◽  
pp. 34-40 ◽  
Author(s):  
Golam Mustafa ◽  
Cho-Ying Chuang ◽  
William A. Roy ◽  
Mohamed M. Farhath ◽  
Nilisha Pokhrel ◽  
...  
Keyword(s):  
Force Measurement ◽  
Force Sensor ◽  
Fluorescence Signal
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