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| 锁相环跟踪超声振动系统谐振频率的改进 | |
| 引用本文： | 王艳东,李赫,王敏慧,鲍善惠. 锁相环跟踪超声振动系统谐振频率的改进[J]. 声学技术, 2007, 26(2): 253-256 |
| 作者姓名： | 王艳东 李赫 王敏慧 鲍善惠 |
| 作者单位： | 1. 辽宁科技大学理学院,辽宁鞍山,114044;陕西师范大学应用声学研究所,陕西西安,710062 2. 鞍山市第六十三中学,辽宁鞍山,114031 3. 陕西师范大学应用声学研究所,陕西西安,710062 |
| 摘 要： | 锁相式频率跟踪超声发生器的频率跟踪范围较小且易出现死锁现象,通常要人为重新启动,系统才能恢复跟踪状态,在应用时会带来麻烦。根据超声振动系统的等效电路研究其阻抗特性,并通过实验绘制换能器特性曲线,分析应用CD4046跟踪串联谐振频率容易造成死锁的具体原因,提出带解锁的频率跟踪系统的方案。实验结果表明此方案有较大的跟踪调节范围与较强的适应负载变化的能力,对超声发生器的具体应用有一定的参考意义。 |
| 关 键 词： | 锁相环 频率跟踪 串联谐振频率 超声振动系统 |
| 文章编号： | 1000-3630（2007）-02-0253-04 |
| 收稿时间： | 2005-11-05 |
| 修稿时间： | 2005-11-052006-02-28 |
Improving PLL tracking of ultrasonic vibration resonant frequency |
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| WANG Yan-dong,LI He,WANG Min-hui and BAO Shan-hui. Improving PLL tracking of ultrasonic vibration resonant frequency[J]. Technical Acoustics, 2007, 26(2): 253-256 | |
| Authors: | WANG Yan-dong LI He WANG Min-hui BAO Shan-hui |
| Affiliation: | University of Science and Technology Liaoning, Anshan 114044, China;Applied Acoustics Institute, Shaanxi Normal University, Xi''an 710062, China;Anshan No. 63 Middle School, Anshan 114031, China;Applied Acoustics Institute, Shaanxi Normal University, Xi''an 710062, China;Applied Acoustics Institute, Shaanxi Normal University, Xi''an 710062, China |
| Abstract: | We discuss impedance characteristics of an ultrasonic vibration system.The causes of dead-locking in tracking series resonant frequency with CD4046 are analyzed.A new frequency tracking system with unlock circuit is proposed.Experimental results show that the new method can track series frequency of an ultrasonic vibration system in a wide frequency band,and adapt well to the mutative loads.It is of practical significance in the design of ultrasonic generators. |
| Keywords: | phase-locked loop frequency tracking series resonant frequency ultrasonic vibration system |
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