High-Accuracy Readout Electronics for Piezoresistive Tactile Sensors

Area of Science:

• * Electrical Engineering
• * Materials Science
• * Robotics

Background:

• * Piezoresistive tactile sensors are commonly arranged in M x N arrays to minimize wiring complexity.
• * Traditional array reading methods suffer from crosstalk, preventing accurate individual sensor resistance measurement due to circuit nonidealities.
• * This limits the precision and reliability of tactile sensing in applications.

Purpose of the Study:

• * To assess novel reading methods for piezoresistive tactile sensor arrays that minimize crosstalk errors.
• * To design and evaluate an electronic system for implementing these improved array reading techniques.
• * To compare the performance of the new methods against the traditional approach using discrete resistors and a functional tactile sensor.

Main Methods:

• * Development of an electronic system for reading piezoresistive sensor arrays.
• * Implementation and testing of two distinct reading methods designed to mitigate crosstalk.
• * Comparative analysis using an array of discrete resistors and an 8x7 taxel tactile sensor.

Main Results:

• * The proposed reading methods demonstrated a significant reduction in crosstalk errors compared to the traditional method.
• * The designed electronic system successfully facilitated accurate individual resistance measurements.
• * Validation was achieved through empirical testing with both discrete resistor arrays and a multi-taxel tactile sensor.

Conclusions:

• * The developed reading methods offer a viable solution to the crosstalk problem in piezoresistive tactile sensor arrays.
• * The electronic system provides a robust platform for implementing these error-minimizing techniques.
• * Improved tactile sensing accuracy can be achieved, enhancing the capabilities of robotic and electronic systems.