Application of charge amplifiers with Polyvinylidene Fluoride materials

Abstract

The current paper proposes an improved specialized charge amplifier as an interface for measurement based applications that utilize Polyvinylidene Fluoride (PVDF) material. As this material and its interfacing electronics are still being researched, most of the applications and topologies are in development. PVDF material characteristics are reviewed and set as a basis for the design of the proposed charge amplifier. Experimental results of the proposed circuitry are compared to conventional voltage amplifiers. The charge amplifier characteristics and benefits are presented and discussed. Methodology for design of charge amplifier, applied to several measurement applications that utilize PVDF, is discussed.

Real-Time Deflection Monitoring for Milling of a Thin-Walled Workpiece by Using PVDF Thin-Film Sensors with a Cantilevered Beam as a Case Study

“…The charge is then amplified by a charge amplifier circuit [ 23 ], converted into digital signals, and sent to the PC. The PVDF thin-film sensor can work within a wide frequency range with high sensitivity, it has good repeatability and reliability.…”