Performance Evaluation of a Specialized Pressure Sensor for Pick and Place Operations

Abstract

A piezoresistive electrical bagging material with minimal cost and profile, such as linqstat or velostat, is a good choice for pressure-sensing systems in robotic arm grippers. This paper’s main objective is to examine the performance of a unique velostat-based pressure sensor system for supplying real-time grasping pressure profiles during the lifting of calibrated weights. Copper conductive tape was used to build the sensor, and it was positioned on top of and beneath a velostat sheet to serve as an electrode. The accuracy, repeatability, and hysteresis responses of the pressure sensor system were examined through a variety of experiments, as well as through testing with calibrated weights ranging from 100 gm to 2000 gm in steps. The sensor’s hysteresis and nonlinear characteristics were discovered through the experimental results of loading cycle measurements. Velostat proved to be a realistic option as a sensitive material for sensors with a single electrode pair, depending on the sensor’s sensitivity, hysteresis, reaction time, loading conditions, and deformation. The area where the velostat sensor might be implemented was verified by experimental results.

Keywords

• pressure sensor
• Arduino board
• velostat
• calibrated weights
• hysteresis
• grippers