Electromechanical characterization of piezoelectric PVDF polymer films for tactile sensors in robotics applications

The authors present a large area collision detection sensor utilizing the piezoelectric effect of polyvinylidene fluoride film. The proposed sensor system provides high dynamic range for touch sensation, as well as robust adaptability to achieve collision detection on complex-shaped surfaces. The design allows for cohabitation of humans and robots in cooperative environments that require advanced and robust collision detection systems. Data presented in the paper are from sensors successfully retrofitted onto an existing commercial robotic manipulator.

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“…(At high temperature, the poles of the polymer become randomly oriented, eliminating the charge gradient [15]. )…”

Section: Materials and Structuresmentioning

confidence: 99%

Piezoelectric Polymer-Based Collision Detection Sensor for Robotic Applications

2015

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“…The employed experimental equipment has been thoroughly discussed in a previous publication [25], which reports more complete characterization results of the PVDF electromechanical behavior. Briefly, the experimental setup (see Figure 2) consists of a rigid frame with a lower fixed plate to which an electro-mechanical shaker is assembled.…”

Section: Electromechanical Characterization Of Pvdf Filmsmentioning

confidence: 99%

A Tactile Sensing System Based on Arrays of Piezoelectric Polymer Transducers

Seminara¹,

Pinna²,

Capurro³

et al. 2012

Smart Actuation and Sensing Systems - Recent Advances and Future Challenges

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“…PVDF, when crystallized in its β-phase, exhibits piezoelectric properties because of which mechanical energy can be converted to electrical energy and vice versa. Therefore, PVDF has been used to manufacture sensors and actuators that can be utilized in various practical applications including shock impact and pressure sensors, (8,9) biomedical sensors, (10,11) acoustic sensors, (12,13) tactile sensors, (14) active vibration control, (15) and structural health monitoring of civil and aerospace structures. (16,17) Sirohi and Chopra (18) demonstrated the superior signalto-noise ratio of PVDF sensors compared to conventional foil gauges for dynamic strain sensing.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Impact Force Identification Using Output Response of PVDF Sensor

2018

Sensors and Materials

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Impact force identification from structural dynamic responses at certain points on a mechanical structure subjected to impact is a classical inverse problem in dynamics. There has been a growing demand for an efficient inverse algorithm and/or sensors that can overcome the ill-conditioning problem often encountered in an inverse analysis. This study investigates the capabilities of a polyvinylidene fluoride (PVDF) sensor to identify impact force. Impact force was identified from the response of a PVDF sensor attached to a steel cantilever beam. A simple method involving neither the analytical nor the experimental Green's function was used to create the objective function that was minimized during the optimization process. Results of parametric studies on the effect of PVDF output length included in the process of optimizing the objective function suggest that identification accuracy appears to be more vulnerable to peak differences than to area differences. Output lengths of 50 and 100 ms appear to yield good identification accuracy for both peak-and area-based evaluations. Furthermore, accuracy of identification seems to be susceptible to variations in the starting time of impact history. However, such susceptibility was overcome by the PVDF sensor's excellent signal-to-noise ratio, thanks to which the starting point of an impact's history can be accurately identified.

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Electromechanical characterization of piezoelectric PVDF polymer films for tactile sensors in robotics applications

Cited by 126 publications

References 18 publications

Piezoelectric Polymer-Based Collision Detection Sensor for Robotic Applications

Piezoelectric Polymer-Based Collision Detection Sensor for Robotic Applications

A Tactile Sensing System Based on Arrays of Piezoelectric Polymer Transducers

An Experimental Study on Impact Force Identification Using Output Response of PVDF Sensor

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