A Study on Impact Force Detection Method Based on Piezoelectric Sensing

Area of Science:

• Mechanical Engineering
• Materials Science
• Vibration Analysis

Background:

• Impact force detection is crucial for mechanical part reliability and longevity.
• Transient impact events generate significant impulse forces, necessitating accurate characterization.
• Understanding impact stress waves is key to indirect force measurement.

Purpose of the Study:

• To propose and validate a method for indirectly characterizing impact force using stress wave analysis.
• To establish a correlation between impact force and the resulting stress wave response.
• To provide a reliable technique for impact force detection in engineering applications.

Main Methods:

• Utilizing LS-DYNA software for explicit dynamic finite element analysis of a ball impacting a steel plate.
• Establishing a correspondence between simulated impact force and measured impact response.
• Building an experimental platform for validating the finite element model and detection method.

Main Results:

• Finite element analysis successfully modeled the impact event and response.
• A strong correlation was found between impact force and the detected stress wave signal.
• Experimental results closely matched the finite element method predictions.

Conclusions:

• The proposed method effectively characterizes impact force indirectly through stress wave detection.
• Piezoelectric signals can reliably serve to characterize impact forces.
• This technique offers valuable guidance for impact resistance design and safety assessments in engineering.