Pressure sensor from a PVDF film

Shirinov, A.V.; Schomburg, Werner Karl

doi:10.1016/j.sna.2007.04.002

Cited by 357 publications

(211 citation statements)

References 1 publication

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“…PVDF is a pyroelectric material which means that charge will generate on its surface in response to changes in temperature [37,61]. The amount of charge generated for a piezoelectric film per unit change in temperature is given by the pyroelectric coefficient p in Table 2.1.…”

Section: Piezoelectric Sensorsmentioning

confidence: 99%

Investigation into use of piezoelectric sensors in a wheeled robot tire for surface characterization

Armstrong

Sandu

Taheri

2015

Journal of Terramechanics

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A differential steered, 13.6 kg robot was developed as an intelligent tire testing system and was used to investigate the potential of using piezoelectric film sensors in small tube-type pneumatic tires to characterize tire-ground interaction.One focus of recent research in the tire industry has been on instrumenting tires with sensors to monitor the tire, vehicle, or external environment. On small robots, tire sensors that measure the forces and deflections in the contact patch could be used to improve energy efficiency and/or mobility during a mission.The robot was assembled from a SuperDroid Robots kit and instrumented with low-cost piezoelectric film sensors from Measurement Specialties between the inner tube and the tire. An unlaminated and a laminated sensor were placed circumferentially along the tread and an unlaminated sensor was placed along the sidewall. A slip ring transferred the signals from the tire to the robot. There, the signal conditioning circuit extended the time constant of the sensors and filtered electromagnetic interference. The robot was tested with a controlled power sequence carried out on polished cement, ice, and sand at three power levels, two payload levels, and with two tire sizes.The results suggest that the sensors were capable of detecting normal pressure, deflection, and/or longitudinal strain. Added payload increased the amplitude of the signals for all sensors. On the smaller tires, sensors generally recorded a smaller, wider signal on sand compared to cement, indicating the potential to detect contact patch pressure and length. The signals recorded by the unlaminated sensor along the tread of the smaller tire were lower on ice compared to cement, indicating possible sensitivity to tractive force. Results were less consistent for the larger tires, possibly due to the large tread pattern.

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Section: Piezoelectric Sensorsmentioning

confidence: 99%

Investigation into use of piezoelectric sensors in a wheeled robot tire for surface characterization

Armstrong

Sandu

Taheri

2015

Journal of Terramechanics

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“…Their carbon-fluorine chemistry renders them highly resistant to solvents, acids and bases. A disadvantage is that achieving good performance (BkPa sensitivity) requires electrical poling to create maximum polarization in the direction orthogonal to the film plane 20,21 . This process constrains engineering design options and, at the same time, requires multiple preparatory steps.…”

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confidence: 99%

High performance piezoelectric devices based on aligned arrays of nanofibers of poly(vinylidenefluoride-co-trifluoroethylene)

et al. 2013

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Multifunctional capability, flexible design, rugged lightweight construction and self-powered operation are desired attributes for electronics that directly interface with the human body or with advanced robotic systems. For these applications, piezoelectric materials, in forms that offer the ability to bend and stretch, are attractive for pressure/force sensors and mechanical energy harvesters. Here, we introduce a large area, flexible piezoelectric material that consists of sheets of electrospun fibres of the polymer poly(vinylidenefluoride-co-trifluoroethylene). The flow and mechanical conditions associated with the spinning process yield free-standing, three-dimensional architectures of aligned arrangements of such fibres, in which the polymer chains adopt strongly preferential orientations. The resulting material offers exceptional piezoelectric characteristics, to enable ultra-high sensitivity for measuring pressure, even at exceptionally small values (0.1 Pa). Quantitative analysis provides detailed insights into the pressure sensing mechanisms, and establishes engineering design rules. Potential applications range from self-powered micro-mechanical elements, to self-balancing robots and sensitive impact detectors.

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“…These properties are at the origin of various applications, especially in the field of sensor and actuator devices and technologies [1,2,3].…”

Section: Introductionmentioning

confidence: 99%

Electric field poling 2G V/m to improve piezoelectricity of PVDF thin film

Hartono

Darwin

Ramli

et al. 2016

AIP Conference Proceedings

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Pressure sensor from a PVDF film

Cited by 357 publications

References 1 publication

Investigation into use of piezoelectric sensors in a wheeled robot tire for surface characterization

Investigation into use of piezoelectric sensors in a wheeled robot tire for surface characterization

High performance piezoelectric devices based on aligned arrays of nanofibers of poly(vinylidenefluoride-co-trifluoroethylene)

Electric field poling 2G V/m to improve piezoelectricity of PVDF thin film

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