Design, Simulation, and Fabrication of a New Three-Axis Inertial Switch with a Triangular Movable Electrode Structure

Area of Science:

• Mechanical Engineering
• Electrical Engineering
• Sensor Technology

Background:

• Inertial switches are crucial for detecting acceleration and impacts.
• Existing designs may face limitations in dynamic response and stability under multi-axis acceleration.
• Improving the dynamic stability and response of inertial switches is essential for reliable performance in various applications.

Purpose of the Study:

• To propose and analyze a novel three-axis inertial switch with enhanced dynamic response and stability.
• To investigate the mechanical and dynamic characteristics of a newly designed inertial switch.
• To validate the performance of the designed inertial switch through simulation and experimental testing.

Main Methods:

• Design of a triangle-structured movable electrode for improved dynamic performance.
• Static mechanical analysis to determine displacement characteristics under acceleration.
• Dynamic simulation analysis to predict the acceleration threshold in sensitive and non-sensitive directions.
• Fabrication and experimental testing of the inertial switch prototype.

Main Results:

• Static analysis showed minimum displacement in the sensitive direction.
• Dynamic simulation predicted an acceleration threshold of approximately 235 g in the sensitive direction.
• Simulated thresholds in non-sensitive directions ranged from 240 g to 350 g.
• Experimental testing of the prototype yielded a threshold of approximately 219 g.
• Test results confirmed the designed inertial switch's dynamic stability and impact resistance.

Conclusions:

• The proposed triangle-structured movable electrode significantly enhances the dynamic stability of the three-axis inertial switch.
• The designed inertial switch demonstrates superior performance in resisting impacts in non-sensitive directions while maintaining stability in the sensitive direction.
• Experimental validation confirms the design's effectiveness, paving the way for its application in demanding environments.