![]() ![]() As the piezo film is displaced from the mechanical neutral axis and bending creates very high strain within the piezo polymer, high voltages (about ☙0V) are generated. ![]() The film is a flexible component comprising a 28 µm thick piezoelectric PVDF polymer film with screen-printed Ag-ink electrodes, laminated to a 0.125 mm polyester substrate, and fitted with two crimped contacts. The sensor is able to detect vibration, flexibility, impact and touch. It is made up of flexible piezo film and converter board. ( 1992).This is an Arduino compatible piezo film vibration sensor. Kynar Piezo Film Technical Manual, Pennwalt Corp., Valley Forge, PA, ( 1987).Ĭhang, C.K., “ Impact and Vibration Behavior of Composite Laminated Plate Using Piezo-film Sensors,” MS Thesis, National Cheng Kung Univ., Tainan, Taiwan, R.O.C. Mat., 26, 334–349 ( 1992).Ībraham, I.D., et al., “Piezoelectric and Piezoresistive Pickup,” Shock and Vibration Handbook, ed. et al., “ A Multi-purpose Sensor for Composite Laminates Based on a Piezo-electric Film,” J. “ The Effect of Square Cut-outs on the Natural Frequencies and Mode Shapes of GRP Crossply Laminates,” Comp. “ Analysis of Laminated Composites Containing Distributed Piezoelectric Ceramics,” J. Part I: Governing Equations and Reciprocal Relations,” J. Lee, C.K., “ Theory of Laminated Piezoelectric Plate for the Design of Distributed Sensors/actuators. “ A Self-sensing Piezoelectric Actuator for Collocated Control,” J. “ Distributed Piezoelectric Sensor/actuator Design for Dynamic Measurement/control of Distributed Parameter Systems: a Piezoelectric Finite Element Approach,” J. Luis, J., “ Use of Piezoelectric Actuators as Elements of Intelligent Structures,” AIAA, 25, 1373–1385 ( 1987). Tierstein, H.F., Linear Piezoelectric Plate Vibration, Plenum Press, New York ( 1969).Ĭald, W.G., Piezoelasticity, Dover, New York ( 1964).Ĭrawley, E.F. Mindlin, R.D., “ High Frequency Vibration of Crystal Plates,” Quart. The results were found to be in good agreement with the numerical solution obtained from the MARC finite-element code. Specimen transient central deflection subjected to impact loading was identified based on test findings and the plate-type piezo-film sensor equation. Drop tests were also performed on clamped s GFRP laminates and aluminum targets, with nine piezo-film sensors being glued to the specimen's distal surface in order to determine the low-speed impact response. Effect of frequency and piezo-film's size on lower frequency attenuation is explicitly formulated based on a simple RC circuit analogy. A modified piezo-film sensor equation is thus proposed for lower frequency measurements. At frequencies lower than approximately 3 kHz, however, the voltage measured directly from a piezo-film sensor underestimates structural response. At frequencies above 3 kHz, piezo-film transducers are capable of closely detecting structural dynamic response in the absence of charge amplification. Experimental results and those simulated by the MARC finite-element code were found to be in good agreement, with the difference between the two being less than five percent. The first three bending frequencies of the glass-fiber-reinforced plastic (GFRP) cantilever specimen were examined. Piezo-film sensors, with a thickness and area of 110 μm and 1×1 cm 2, respectively, were connected directly to a voltage measurement device in these tests. A series of vibration and impact tests were conducted for the determination of structural dynamic response. Simple beam- and plate-type sensor equations were derived based on classical plate theory incorporating the linear piezoelastic constitutive relationship. Piezo-film sensors were employed in determining the dynamic response of s s-glass/epoxy laminates and 2024 aluminum specimens.
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