Research of a Cross-Interference Suppression Method for Piezoresistive Three-Dimensional Force Sensor

Area of Science:

• Mechanical Engineering
• Sensor Technology
• Metrology

Background:

• Cross-interference significantly impacts the accuracy of three-dimensional force sensors.
• Minimizing cross-interference is a critical challenge in designing these sensors.

Purpose of the Study:

• To propose and validate a method for suppressing cross-interference in three-dimensional force sensors.
• To improve the measurement accuracy of force sensing devices.

Main Methods:

• Utilizing the structural symmetry of an octagonal ring.
• Applying the balance principle of Wheatstone bridges.
• Optimizing strain gauge placement, angle deviation, and bonding processes.

Main Results:

• The proposed method effectively suppresses cross-interference.
• Initial optimal cross-interference error achieved was 1.03%.
• Further optimization reduced the cross-interference error to -0.36%.

Conclusions:

• The developed cross-interference suppression method is feasible and effective.
• Optimizing sensor design parameters enhances accuracy.
• The technique offers a viable solution for high-precision force measurement.