SMTA International Conference Proceedings

Test Methodology & Metrics for Force Sensing Resistors

Author: Edward Collins
Company: Jabil's Manufacturing Technology & Innovation (MTI) Group
Date Published: 9/22/2019   Conference: SMTA International

Abstract: Force sensitive resistors also known as force sensing resistors or (FSR's) are a line of sensors that are sensitive to an applied pressure or touch. When the sensing area of an FSR is under pressure the resistance of the FSR changes. The FSR basically acts as a variable resistor that is dependent on the force applied. While FSR's are not new they have gained popularity and are routinely integrated into robotics, automation equipment and a variety of other applications developed by technology companies including Jabil. Each FSR manufacturer features their own formulations for the conductive inks and force sensitive materials. These inks and materials are usually blended in various ratios and obtain different resistance and sensitivity profiles. Jabil evaluated five FSR manufacturers and tested their products response to various test scenarios. The five vendors were classified vendors A thru E All sensors were "Shunt Mode" devices.

Key Words: 

FSR, Hysteresis, creep, Quantum Tunneling, Percolation

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