Piezoelectric polymer transducer for impact pressure measurement

DeReggi, A.S.

doi:10.6028/nbs.ir.75-740

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…Piezoelectric PVDF film is a type of piezoelectric polymer that has been widely used for many applications such as sensor or energy harvesting due to their good sensitivity, flexibility, mechanical strength and displacement [1][2][3][4][5][6][7][8][9]. Generally, there are five main procedures in making piezoelectric PVDF film including: stretching PVDF films, depositing electrode onto PVDF surface, poling process, wiring in copper plate, and laminating with plastic.…”

Section: Introductionmentioning

confidence: 99%

A New Approach of Polyvinylidene Fluoride (PVDF) Poling Method for Higher Electric Response

et al. 2013

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Good response, in particular high sensitivity, of polyvinylidene fluoride (PVDF) attracts a lot of research works on its manufacturing process and applications. Polarization is an important factor that is influential to the performance of PVDF. In this article, a new polarization method using ITO (Indium Tin Oxide) glass is proposed. Different from the conventional poling method using metal eletrode coated onto PVDF film, ITO glass is used as electrode to transmit the electric field voltage into PVDF film for poling. With the advantage of applying higher electric field in the process of polarization and eliminating the occurrence of flashover and arcing efficiently, this approach can thus make PVDF film gain better electric output response. Also, thinner film is constructed would be another advantage of sensitivity improvement. Comparison with conventional method for regular polarization area is carried out by using both FTIR and DSC equipment. Piezoelectric charge constant d 33 and electricity output response as well as sensitivity of PVDF are measured in experiment, which indicate ITO glass poling method is superior to conventional technique.

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Section: Introductionmentioning

confidence: 99%

A New Approach of Polyvinylidene Fluoride (PVDF) Poling Method for Higher Electric Response

et al. 2013

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“…Test results showed that a linear relationship can be established for both cases. 7) The linear relationship between input stress and corrected gage output holds for the gage whether it is placed on a concrete pedestal and backfilled by soil, or embedded in soil to simulate a free field condition. Therefore, the gage needs only to be tested under either condition to establish the relationship.…”

Section: Presentation Interpretation and Discussion Of Test Resultsmentioning

confidence: 99%

“…The polymer gage has been used in several studies to measure dynamic pressure developed by impact loads. In a 1975 study by DeReggi [7], the polymer gage was designed, constructed, and calibrated for recording pressure transients developed over the interface between two bodies as a result of impact. The measurement of interface pressure is of interest in studying injuries sustained in vehicular crashes.…”

Section: Pressure Measurementmentioning

confidence: 99%

“…Detailed descriptions of the gage fabrication are beyond the scope of this report; however, they can be found in publications by Bur and Tsao [5] and DeReggi [7] of the National Bureau of Standards.…”

mentioning

confidence: 99%

“…As a result, no measureable difference between the corrected and uncorrected output signals from the polymer gage can be found for the range of stresses (up to about 2000 psi) introduced to the polymer gage. all cases, the gage consists of a basic unit called "bilaminate construction" with a thermocouple (figure7). It is made from two sheets of PVDF which are laminated together using epoxy.Each sheet (0.012 or 0.025 mm thickness) contains an active area on which aluminum electrodes are deposited.The active area is 10 mm (d) with an overall gage diameter of 15 mm (D).A copper-constantan thermocouple junction, made of 0.075 mm wire, is placed between the two sheets and within 2 mm of the active area of the gage.…”

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confidence: 99%

See 2 more Smart Citations

Development of an NBS polymer gage for dynamic soil stress measurement

Chung¹,

Bur²,

Reasner³

1985

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A multi‐purpose dynamic and tactile sensor for robot manipulators

Tzou

Pandita

1987

J. Robotic Syst.

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In this article, a multi-purpose tactile/acceleration sensor system made of newly developed thick polymeric piezoelectric material and capable of sensing acceleration, contact force and pressure is developed and evaluated using analytical and experimental techniques. The sensor system is discretized and modeled by a single degree of freedom second order system from which equations of electromechanical dynamics are formulated to evaluate its performance. Analytical solutions are compared favorably with experimental results. INTRODUCTIONAccurate acceleration, force, and pressure measurements provide information to robotic system for high precision manipulation and control in performing various tasks. In various sensor designs for dynamic measurements and control, piezoelectricity is probably the most widely used electromechanical characteristics. In general, piezoelectric material responds to mechanical forces and/or pressures and generates an electric charge which is referred to as the direct piezoelectric effect. Conversely, application of electric field to the material can produce mechanical stress or strain which is named as the reciprocal, or converse piezoelectric effect. Temperature change also affects electric polarization on some 720 Journal of Robotic Systems-7987piezoelectrics, which is referred to as the pyroelectric effect.' The Curie brothers, Pierre and Jacques, first observed piezoelectricity in natural crystals in 1880.2 Brain investigated piezoelectric polymers in 1924.3 Kawai discovered piezoelectric polymeric polyvinylidene-fluoride (PVDF) in 1969.4 Bergman' and McFee6 also found pyroelectric properties in PVDF polymer PVDF is pliant, tough, lightweight, and flexible and can be made in large flat sheet. On the contrary, piezoelectric ceramics and natural crystals are usually dense, brittle, stiff, and difficult to produce large size and impractical to fabricate into complex shapes. In applications of the synthetic piezoelectric materials to dynamic measurements and control, the flexibility, continuous surface area, dimensional stability, arbitrary geometric configurations, and low production cost of the PVDF polymer do provide great advantages over other crystalline materials, which directly result in increasing its popularity since the mid-1970'~.'.~ Thin Tzou and Pandita: Multi-Purpose Dynamic and Tactile Sensors 72 1 FORMULATION Piezoelectricity in Thlck Polymeric PVDF Fiat piezoelectric material can be generally expressed in a complex matrix form:The relationship between electric polarization and mechanical strain/stress in

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Piezoelectric polymer transducer for impact pressure measurement

Cited by 9 publications

References 5 publications

A New Approach of Polyvinylidene Fluoride (PVDF) Poling Method for Higher Electric Response

A New Approach of Polyvinylidene Fluoride (PVDF) Poling Method for Higher Electric Response

Development of an NBS polymer gage for dynamic soil stress measurement

A multi‐purpose dynamic and tactile sensor for robot manipulators

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