PVF2 Piezoelectric Polymer Shock Stress Sensor: System Characterization for Application under Field Test Conditions.

摘要

The piezoelectric polymer, polyvinylidene di-fluoride (PVDF or PVF2), properly processed by the proprietary Bauer technique, is a material for a transducing element that can be used for a wide variety of stress, pressure, or temperature related measurements. Its versatility as a sensor requires especially careful attention to the special requirements for associated gauge packaging, installation, signal conditioning, recording, and analysis that are imposed by the particular diverse test conditions. Most applications reported to date have been for tests performed under laboratory conditions. But, the PVDF sensor has also been successfully used for stress wave measurement under adverse and often hostile field test conditions that require the use of lengthy transmission lines and allow only limited recording capability. This paper discusses one crucial aspect of field application -- measuring system characterization, and correction of signals distorted by systems of marginal frequency capability. 11 refs., 7 figs.