Static force measurement with piezoelectric sensors based on pseudorandom sequences

2008 ◽  
Author(s):  
D. Shmilovitz ◽  
M. Kerman ◽  
S. Ozeri ◽  
S. Engelberg
Keyword(s):  
Force Measurement ◽  
Piezoelectric Sensors ◽  
Static Force ◽  
Pseudorandom Sequences

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.

Static force measurement for automation assembly systems

2012 ◽  
Vol 187 ◽  
pp. 147-153 ◽  
Author(s):  
Chung-Hsien Lin ◽  
Mi-Ching Tsai ◽  
Shih-Wei Hsiao
Keyword(s):  
Force Measurement ◽  
Assembly Systems ◽  
Static Force

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

Development and Characterization of a Diaphragm-Shaped Force Transducer for Static Force Measurement

MAPAN ◽  
2017 ◽  
Vol 32 (3) ◽  
pp. 167-174 ◽  
Author(s):  
Rajesh Kumar ◽  
B. D. Pant ◽  
S. Maji
Keyword(s):  
Force Measurement ◽  
Force Transducer ◽  
Static Force

Feasibility Investigation of a Static Force Measurement with Longitudinal Piezoelectric Resonant Sensor

2009 ◽  
Vol 147-149 ◽  
pp. 876-881 ◽  
Author(s):  
Christophe Viguier ◽  
Clément Nadal ◽  
Jean François Rouchon
Keyword(s):  
Force Feedback ◽  
Force Measurement ◽  
Open Loop ◽  
Experimental Results ◽  
Frequency Variation ◽  
Variation Principle ◽  
Static Force ◽  
Stiffness Sensor ◽  
Definition Of ◽  
Langevin Transducer

Some applications, like force feedback joystick, require force measurement with high stiffness sensor to limit handle oscillations. In this way, this article presents an original technology to measure static force using the resonance frequency variation principle of a piezoelectric actuator subject to preload variation. We present in a first part comparison of various involved technologies to justify our choice (stiffness, inertia.....). The second part deals with the analytical modelling by variational principle of Langevin transducer. A comparison with the numerical FEM results is performed. Experimental results are then reached to validate the detailed concept. They demonstrate the potentiality of static force measurement with classical resonant structure like Langevin transducer with laboratory instruments. A last part is dedicated to the definition of an electronic to supply the sensor and to treat the measure. First experimental results are presented in an open loop electronic power supply configuration.

scholarly journals ​The importance of occlusal force measurement in orthognathic surgery - A pilot study

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Fernando Duarte
Keyword(s):  
Orthognathic Surgery ◽  
Force Measurement ◽  
Anterior Part ◽  
Posterior Part ◽  
Piezoelectric Sensors ◽  
Dental Arch ◽  
Occlusal Force ◽  
Occlusal Contact ◽  
Pressure Region ◽  
Bite Pressure

Purpose: This pilot investigation was designed to apply several, newly developed and more sophisticated methods of measuring muscle structure and function in a situation where adaptation of muscle is pivotal to the success of a therapeutic approach. Materials and Methods: Patients attending the combined orthodontic/orthognathic surgery clinic at the Clitrofa – Centro Médico, Dentário e Cirúrgico, in Trofa - Portugal were tested according to the protocol of Bite force and occlusal contact area were simultaneously measured with Bite Training Machine and Occlusal Force Diagnostic System. An Experimental design used for the measurement of occlusal force. The study involved the contribution of two independent examiners that measured the bite pressure (psi) in five different FSS sensors at three different time moments. A combination of different parametric tests has been used to compare the different experimental variables. Results: Neither the variation of examiner, nor the variations of time have shown to influence the bite pressure (psi). In contrast, the occlusal force measurement system developed has shown a high level of sensitivity due to the distribution of the five FSS sensors in the horseshoe-shaped form. A three-pressure region model fits the experimental data shown in this study, comprising a low-pressure region located in the anterior part of the dental arch, a medium-pressure region in the medial part of the dental arch and an high-pressure region located in the posterior part of the dental arch. Conclusions: The piezoelectric sensors used in the present study have shown high reproducibility of measurement. Due to the recent miniaturization of FSS sensors, the authors are developing new occlusal force measurement systems comprising a higher number of piezoelectric sensors, with the objective of attaining even higher sensitivity of measurement throughout the different region of the dental arches.

Static Force Measurement Technology Wind Tunnel Test

2013 ◽  
Vol 423-426 ◽  
pp. 1689-1692
Author(s):  
Dun Jin ◽  
Yue Ming Yang ◽  
Jie Wu ◽  
Li Min Song ◽  
Song Li
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Force Measurement ◽  
Spin Dynamics ◽  
Limit State ◽  
Wind Tunnel Test ◽  
Measurement Technology ◽  
Static Force ◽  
Aerodynamic Test ◽  
High Angles Of Attack

Static force measurement aerodynamic wind tunnel test data provided by the aircraft normally used to predict the stall characteristics, predicted aircraft deviated,spin Sensitivities, numerical simulation of aircraft stall, spin dynamics and so on. Based on practical flight, the paper analyzed the harm of limit state flight-spin to the flight safe, emphasized the static force test techniques at high angles of attack, and obtained a series of aerodynamic test date, managed them to spin prediction analysis.

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