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Development of Excitation Sources for Liquid High Frequency Sinusoidal Pressure Based on Piezoelectric Stack |
LI Bo1;YANG Jun1;ZHANG Heyu1;ZHANG Zhaojing2;GONG Zheng3 |
1.Changcheng Institute of Metrology & Measurement,Beijing,100095
2.Beijing Institute of Precise Mechatronics and Controls,Beijing,100076
3.Beijing North Vehicle Group Corporation,Beijing,100072 |
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Abstract The sinusoidal motions of liquid in sealed cavity were driven by piezoelectric stack to realize the sinusoidal changes of pressure in hydraulic cavities. According to the piezoelectric effect and cavity resonance principle, the excitation sources of high frequency sinusoidal pressure with single piezoelectric stack and double piezoelectric stacks were designed, the two devices were compared. The results show that the double piezoelectric stacking device with a novel way of generating sinusoidal pressure may generate a large sinusoidal pressure amplitude and a small sinusoidal distortion. The working frequency of the device is up to 30 kHz. The amplitude and waveform of sinusoidal pressure may be adjusted at the same frequency. The device may meet the measurement and calibration requirements for dynamic pressures of pressure sensors and testing systems.
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