摘要
低频超声二次雾化喷头通过声悬浮实现二次雾化,其工作负载较为复杂,常规超声驱动电路难以连续可靠地驱动其工作。应用EVC(Embedded Visual C++),在基于ARM9.0的WINCE 5.0平台下开发了该喷头的智能驱动程序,实现了频率和占空比连续调节,并设计了喷头谐振频率自动跟踪电路。根据跟踪结果,改变ARM的PWM输出频率,可保证喷头工作在谐振点附近;通过对该智能驱动电路的Simulink仿真,验证了其正确性。
The low-frequency ultrasonic atomization nozzle realized the dual atomization by acoustic levitation.For the nozzle＇s load is very complex,normal ultrasonic driver can not drive it work continuously and reliably.In this paper,a intelligent drive program was developed based on ARM9.0 on the platform of WINCE5.0 by EVC（Embedded Visual C＋＋）technology,which can adjust the PWM（Pulse）frequency and duty cycle,and designed an automatic tracking resonant frequency circuit of the nozzle,which realized the track of resonant frequency automatically,so the output frequency of the PWM of the ARM can be changed by following the results that tracked and this ensured the nozzle work near the point of the resonance;The intelligent circuit＇ correctness was validated by the simulink simulation and real practical test.
出处
《农机化研究》
北大核心
2011年第12期175-178,共4页
Journal of Agricultural Mechanization Research
基金
国家"863"计划项目(2008AA100905)
江苏省自然科学基金项目(BK2007090)
江苏省"青蓝"工程项目
关键词
超声雾化
智能驱动
功率反馈系统
频率跟踪
仿真
ultrasonic atomization
intelligent drive
aower feedback system
frequency tracking
simulation
