Application Cases

Experiment Title: Displacement Detection Test Research

Testing Purpose:To apply an excitation signal to the IDEs cylindrical piezoelectric component. Due to the converse piezoelectric effect, the piezoelectric component undergoes contraction and expansion deformation along the polarization direction. The magnitude of the displacement depends on the voltage value, signal waveform, and excitation frequency of the excitation signal. To conduct a more in-depth study on the driving performance of the IDEs cylindrical piezoelectric component, different excitation signals will be used to drive the piezoelectric component. Axial displacement data will be extracted, and time-domain and response diagrams will be drawn to determine the optimal excitation signal and frequency.

Testing Equipment:ATA-2041 High Voltage Amplifier, Function Generator, Oscilloscope, Switch, Computer, etc.

Figure 1: Displacement Detection Platform (1. Arbitrary Function Generator 2. Computer 3. Switch 4. Spectral Confocal Controller 5. IDEs Cylindrical Piezoelectric Component to be Tested 6. Class 100,000 Vibration Isolation Table 7. Probe 8. Voltage Amplifier 9. Oscilloscope)

Experiment Process:

A displacement detection platform was set up. The signal excitation source used an arbitrary function generator. After passing through the ATA-2041 high voltage amplifier from Xi'an Aigtek, one end was electrically connected to the positive and negative electrodes of the IDEs cylindrical piezoelectric component to be tested for excitation voltage input, and the other end was connected to the oscilloscope to observe the waveform curve and parameter changes of the excitation signal.

The piezoelectric component was placed on the vibration isolation table, with its positive and negative electrodes electrically connected to the electronic high voltage amplifier.

Under the excitation of sine wave, square wave, sawtooth wave, and pulse wave signals at voltages ranging from 0V to 200V and frequencies of 1Hz, 10Hz, 30Hz, 50Hz, and 70Hz, the piezoelectric component was subjected to these four types of signals, as shown in Figure 2.

Figure 2: Applied Excitation Signals

Experimental Results:

Figure 3: Displacement Responses Under Various Excitation Signals

The experimental results show multiple instances of noise interference. The reasons are as follows: First, during the processes of pressing, sintering, and grinding of the cylindrical piezoelectric ceramic, cracks and internal bubbles caused by human factors reduce the density of the piezoelectric component. When printing electrodes, silver paste adheres to the surface of the cylindrical piezoelectric ceramic through mesh holes. After the mesh is removed, the part where the silver paste adheres to the wire shows uneven small peaks. These factors indirectly alter the structure of the piezoelectric component, which is the root cause of the internal noise. Second, since the displacement data is only in the micron range, any voltage fluctuation in the circuit or any energy wave from nature can interfere with the measurement results. It is evident that the measurement environment also has a significant impact on the data results.

High Voltage Amplifier Recommendation: ATA-2041

Figure: Specifications of the ATA-2041 High Voltage Amplifier

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