压电喷墨驱动波形和残余振荡研究

Research on Piezoelectric Inkjet Drive Waveforms and Residual Oscillations

压电喷墨打印头的结构、驱动波形等直接影响墨滴的喷射特性和打印精度。运用数值仿真软件COMSOL建立了压电喷墨打印头系统模型,研究了驱动参数(电压幅值、电压停留时间、工作频率)对喷射特性(液滴速度和体积)的影响规律。最后,设计了双极驱动波形来抑制残余振荡。结果表明,该消振波形能有效地抑制残余振荡,提高了喷墨打印头的工作频率和稳定性。

In a piezo inkjet system,the print head structure,driving waveform,and other factors directly influence the jetting characteristics and printing accuracy.In this study,the numerical simulation software COMSOL was employed to establish a model of piezoelectric inkjet printhead system.The influence of driving parameters—voltage amplitude,voltage residence time,and operating frequency—on jetting characteristics was investigated,specifically droplet velocity and volume.Additionally,a bipolar driving waveform was designed to suppress the residual oscillation.The results demonstrate that the damping waveform effectively suppresses the residual vibration of the pressure wave,significantly improving the working frequency and printing accuracy of the inkjet printhead.