A High-Precision Low-Cost Analog Acceleration and Vibration Amplifier using PVDF Piezoelectric Sensors

Thomas L Hemminger

doi:10.34257/gjrefvol21is3pg31

Abstract

This paper describes a high-resolution analog acceleration and vibration amplifier for use with piezoelectric polyvinylidene fluoride (PVDF) sensors. The purpose of this system is to monitor automated parts placement on integrated circuit boards. One of the problems facing production and inspection equipment is the occurrence of resonant and ambient vibrations. Even small errors can cause systems with micrometer and nanometer precision to exceed design tolerances. This work describes a method to monitor mechanical vibrations through a portable and inexpensive signal-processing unit. The system provides user-selectable gain and filtering modules that are compact and reliable. PVDF is currently used in sensing applications, and its material properties have proven very useful for sensing mechanical stress, strain, pressure, and temperature.

Highlights

polyvinylidene fluoride (PVDF) is currently used in sensing applications, and its material properties have proven very useful for sensing mechanical stress, strain, pressure, and temperature
There are, some disadvantages when working with PVDF
This work was initiated from an industrial need for a simple and reliable acceleration and vibration signal conditioning system for automated integrated circuit placement, still there can be many other uses, e.g., impact sensors, flow meters, contact microphones, etc

Summary

Introduction

As the integration level of electronic systems increases and becomes more sophisticated, producing these devices grows more complicated and expensive. Does fabrication become are indicated through a simple LED arrangement, or the system can be connected to a data acquisition recorder for time and/or frequency analysis. 0.1μ g / Hz in (PVDF) is an extremely effective material for converting conjunction with sensor mechanical movements into electrical signals and has. This property makes the material an effective candidate for use in the construction of vibration and acceleration sensors [2]-[7]. There are, some disadvantages when working with PVDF. Does it exhibit a high piezoelectric constant, and a considerable pyroelectric constant, indicating that

System Design the material produces high voltage variations when

R2 C2 R1 C1R1 C1C2 R1R2

Results

Conclusion