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.

A New Structure of a Force Sensor Based on the Analysis of Electromechanical Impedance

2011 ◽  
Vol 179-180 ◽  
pp. 793-800
Author(s):  
Jing Fu Li ◽  
Zhi Jun Long
Keyword(s):  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Force Sensor ◽  
Dynamic Force ◽  
Static Force ◽  
Electromechanical Impedance ◽  
Direct Piezoelectric Effect ◽  
Impedance Technique

In this article a new structure of a force sensor based on piezoelectric materials is proposed. The design and choice of measuring principle is based on the direct piezoelectric effect, for the measurement of the dynamic force, and on the analysis of the electromechanical impedance technique, for measuring the static force. This technique is based on the measurement of modes of the structure. Indeed, the application of stress on the structure will cause changes in the modes of the structure and appearance of new eigenmodes. Thus far these methods should allow for measurement of static force applied.

Development of a commercially viable piezoelectric force sensor system for static force measurement

2017 ◽  
Vol 28 (9) ◽  
pp. 095103 ◽  
Author(s):  
Jun Liu ◽  
Xinwei Luo ◽  
Jingcheng Liu ◽  
Min Li ◽  
Lan Qin
Keyword(s):  
Force Measurement ◽  
Force Sensor ◽  
Sensor System ◽  
Static Force

Design of a Force Sensor Based on Flexure Beams With Piezoresistive and PVDF Elements

2016 ◽  
Author(s):  
Yuzhang Wei ◽  
Qingsong Xu
Keyword(s):  
Polyvinylidene Fluoride ◽  
Output Voltage ◽  
Experimental Studies ◽  
Force Sensor ◽  
Sufficient Accuracy ◽  
Force Sensing ◽  
Biological Cell ◽  
Concept Design ◽  
Cell Injection ◽  
Sensing Applications

Majority of existing methods of measuring micro-force are limited by the sensing elements, which are fixed on the manipulator and not well decoupled from other axes. In this paper, a unique 1-D force sensor with different sensing elements is first proposed as a micro-manipulator for 1-D force sensing applications in biological cell injection. The goal is to fabricate a compliant sensor using piezoresistive and PVDF (polyvinylidene fluoride) elements for cell injection with sufficient accuracy. The designed sensor is manufactured and calibrated with a commercial GSO gram sensor. Experimental results show a good linearity between the applied force and output voltage signals, which demonstrates the feasibility of the concept design of a force sensor acting as the cell holder. The performances of the force sensor employing piezoresistive and PVDF elements are compared by conducting experimental studies.

Design and Calibration of a Six-Axis Force Sensor for Docking Mechanism

2014 ◽  
Vol 667 ◽  
pp. 334-338 ◽  
Author(s):  
Sheng Lin ◽  
Ling Xuan Zhang ◽  
Ji Ming Shao ◽  
Chong Feng Zhang
Keyword(s):  
Natural Frequency ◽  
Vibration Mode ◽  
Force Sensor ◽  
Force Sensing ◽  
Static Force ◽  
Force Analysis ◽  
Sensing Element ◽  
Dynamic Character ◽  
Result Show ◽  
Docking Mechanism

A six-axis force sensor for docking system is presented based on the piezoelectric force sensing element. The dynamic character of the six-axis force sensor is analyzed. The natural frequency and the main vibration mode are obtained. A calibration machine with three force sources is developed for calibration of the six-axis force sensor. A calibration arm is designed for loading of the torque. Static force analysis is conducted for the calibration arm. Result show that the deformation influence of the arm can be ignored.

scholarly journals Piezoelectric Polymer and Paper Substrates: A Review

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3605 ◽  
Author(s):  
Kiran Sappati ◽  
Sharmistha Bhadra
Keyword(s):  
Polymer Composites ◽  
Piezoelectric Properties ◽  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Fabrication Cost ◽  
Piezoelectric Polymers ◽  
Direct Piezoelectric Effect ◽  
Piezoelectric Polymer ◽  
Wide Range ◽  
Actuator Design

Polymers and papers, which exhibit piezoelectricity, find a wide range of applications in the industry. Ever since the discovery of PVDF, piezo polymers and papers have been widely used for sensor and actuator design. The direct piezoelectric effect has been used for sensor design, whereas the inverse piezoelectric effect has been applied for actuator design. Piezo polymers and papers have the advantages of mechanical flexibility, lower fabrication cost and faster processing over commonly used piezoelectric materials, such as PZT, BaTiO3. In addition, many polymer and paper materials are considered biocompatible and can be used in bio applications. In the last 20 years, heterostructural materials, such as polymer composites and hybrid paper, have received a lot of attention since they combine the flexibility of polymer or paper, and excellent pyroelectric and piezoelectric properties of ceramics. This paper gives an overview of piezoelectric polymers and papers based on their operating principle. Main categories of piezoelectric polymers and papers are discussed with a focus on their materials and fabrication techniques. Applications of piezoelectric polymers and papers in different areas are also presented.

scholarly journals Optical actuation of a micromechanical photodiode via the photovoltaic-piezoelectric effect

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
A. Rampal ◽  
R. N. Kleiman
Keyword(s):  
Molecular Beam ◽  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Quantum Circuits ◽  
Direct Piezoelectric Effect ◽  
Electro Optic ◽  
Potential Applications ◽  
New Type ◽  
Optical Circuits ◽  
Lattice Matched

AbstractRadiation pressure and photothermal forces have been previously used to optically actuate micro/nanomechanical structures fabricated from semiconductor piezoelectric materials such as gallium arsenide (GaAs). In these materials, coupling of the photovoltaic and piezoelectric properties has not been fully explored and leads to a new type of optical actuation that we call the photovoltaic-piezoelectric effect (PVPZ). We demonstrate this effect by electrically measuring, via the direct piezoelectric effect, the optically induced strain in a novel torsional resonator. The micron-scale torsional resonator is fabricated from a lattice-matched single-crystal molecular beam epitaxy (MBE)-grown GaAs photodiode heterostructure. We find that the strain depends on the product of the electro-optic responsivity and piezoelectric constant of GaAs. The photovoltaic-piezoelectric effect has important potential applications, such as in the development of configurable optical circuits, which can be used in neuromorphic photonic chips, processing of big data with deep learning and the development of quantum circuits.

scholarly journals Piezoelectric Energy Harvesting Solutions: A Review

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3512 ◽  
Author(s):  
Corina Covaci ◽  
Aurel Gontean
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Effect ◽  
Piezoelectric Transducers ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Direct Piezoelectric Effect ◽  
Harvesting Technique ◽  
Different Shapes ◽  
Piezoelectric Devices ◽  
Review Current

The goal of this paper is to review current methods of energy harvesting, while focusing on piezoelectric energy harvesting. The piezoelectric energy harvesting technique is based on the materials’ property of generating an electric field when a mechanical force is applied. This phenomenon is known as the direct piezoelectric effect. Piezoelectric transducers can be of different shapes and materials, making them suitable for a multitude of applications. To optimize the use of piezoelectric devices in applications, a model is needed to observe the behavior in the time and frequency domain. In addition to different aspects of piezoelectric modeling, this paper also presents several circuits used to maximize the energy harvested.

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.

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