Application Cases

Experiment Name: Experimental Analysis of Piezoelectric Ceramic Fatigue Structures

Research Direction: With the continuous advancement of technology, the methods for energy harvesting have become increasingly diverse. Piezoelectric energy harvesters, which directly capture energy from environmental vibrations, have become a research focus in recent years. This study analyzes the theoretical relationship between the output characteristics of piezoelectric energy harvesting units and their structural parameters, optimizing the structural design from two aspects: the thickness of the piezoelectric ceramic layer and the surface shape of the cantilever beam. Furthermore, from the perspective of piezoelectric material fatigue, the theoretical relationship between piezoelectric ceramic fatigue and the amplitude of the piezoelectric energy harvesting unit is analyzed, further optimizing the reliability of the piezoelectric energy harvesting unit's structure to enhance its efficiency.

Experiment Objective: To analyze the structural design of piezoelectric energy harvesting units from the perspective of piezoelectric ceramic electrical fatigue, and to validate and analyze the effects of piezoelectric ceramic electrical fatigue through experimental data combined with simulation and theoretical data.

Testing Equipment: Signal generator, ATA-3040B power amplifier, signal analyzer, oscilloscope, piezoelectric energy harvester, vibration exciter, etc.

Experimental Procedure: The relationship between the natural frequency of the piezoelectric energy harvesting unit and the number of cyclic loading cycles was measured under acceleration amplitudes of 2 m/s², 4 m/s², and 6 m/s², respectively, to analyze the effect of acceleration amplitude on the natural frequency of the piezoelectric energy harvesting unit. The material parameters of the energy harvesting unit are shown in Table 3.5, and the structural dimensions are shown in Table 3.6.

Experimental Results:

As shown in Figure 3.19, when the excitation acceleration is 2 m/s², the natural frequency of the energy harvesting unit remains almost unchanged. When the excitation acceleration is 4 m/s², the natural frequency of the energy harvesting unit decreases with excitation time, and when the excitation acceleration is 6 m/s², the rate of decrease in natural frequency is even faster. Through calculations, the amplitude at an acceleration of 2 m/s² is equivalent to the amplitude under an external electric field of 1.5E, the equivalent electric field for an acceleration of 4 m/s² is 1.55E, and the equivalent electric field for an acceleration of 6 m/s² is 1.6E.

Power Amplifier Recommendation: ATA-3040C

Figure: ATA-3040C Power Amplifier Specifications

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