文章摘要
刘丽晨,杨明,李世阳,庄晓奇,李奇磊.超声换能器并联谐振频率的复合式跟踪方法研究[J].,2015,34(1):45-50
超声换能器并联谐振频率的复合式跟踪方法研究
Parallel resonant frequency composite tracking of piezoelectric transducer
投稿时间:2014-04-01  修订日期:2014-12-26
中文摘要:
      通过分析超声换能器在并联谐振频率附近工作时的频率特性和实际需求特点,利用变压器初级匹配方法得到了更好的频率特性,并对比了换能器空载和带负荷情况下的阻抗特性曲线,提出了复合式自动频率跟踪方法,空载时找到超声换能器最小电流的对应的频率点,加载过程中利用PID算法实现频率的快速跟踪。并对超声换能器在不同负载时的功率输出进行了实验,结果表明,复合式频率跟踪方法可以稳定地跟踪到超声换能器的并联谐振频率,能实现超声换能器的功率自调节,对提高换能器的工作效率和负荷适应能力具有实际的指导意义和应用价值。
英文摘要:
      By analyzing the frequency characteristics of ultrasonic welding transducer near its parallel resonant frequency and the practical demand, a primary matching is developed to get a better frequency characteristic. Then, comparisons about the transducer impedance curve between on load and no-load are made. The composite tracking strategy is presented, that is, the frequency is found when the transducer has no load and is tracked with the PID algorithm when it has load. An experiment about the output power of ultrasonic welding transducer under different load is made. The research result shows the tracking method can track the parallel resonance frequency of ultrasonic transducer stably and reflects the characteristics of ultrasonic transducer automatic power adjustment, it has practical significance and application value for ultrasonic transducer to improve the efficiency and adaptability.
DOI:10.11684/j.issn.1000-310X.2015.01.007
中文关键词: 复合式跟踪,并联谐振频率,变压器初级匹配,PID算法
英文关键词: Composite tracking,Parallel resonance frequency,Transformer primary matching, PID algorithm
基金项目:(51275287);国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
刘丽晨 上海交通大学仪器科学与工程系 上海 200240 liulichen1107@126.com 
杨明 上海交通大学仪器科学与工程系 上海 200240 myang@sjtu.edu.cn 
李世阳 上海交通大学仪器科学与工程系 上海 200240 shiyangli@126.com 
庄晓奇 上海交通大学仪器科学与工程系 上海 200240 qiqi_zxq@163.com 
李奇磊 上海交通大学仪器科学与工程系 上海 200240 woshiliqilev@sjtu.edu.cn 
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