Authors:
L. Paredes-Madrid
1
and
P. Gonzalez de Santos
2
Affiliations:
1
Centre for Automation and Robotics UPM-CSIC, Spain
;
2
CENTRE OF AUTOMATION AND ROBOTICS (CAR), Spain
Keyword(s):
Piezoresistive, force, Sensor, Nonlinear, Model, Tanh, Piezocapacitive, Flexiforce.
Related
Ontology
Subjects/Areas/Topics:
Force and Tactile Sensors
;
Industrial Engineering
;
Informatics in Control, Automation and Robotics
;
Mechanical Sensors
;
Nonlinear Signals and Systems
;
Sensors Fusion
;
Signal Processing, Sensors, Systems Modeling and Control
;
Systems Modeling and Simulation
Abstract:
This article upgrades the RC linear model presented for the piezoresistive-force sensors. Amplitude nonlinearity was found in sensors conductance, and a characteristic equation was formulated for modeling it. By using such equation, it is possible to determine sensor sensitivity for any driving voltage below 1V. This model considerable improves the plug-and-play capability of the sensor. However, sensor conductance is unsatisfactory modeled by such equation when the input voltage goes over 1V. We present an approach for such driving condition.