| 基于最小电压法的超声换能器谐振频率自动跟踪* |
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| 引用本文： | 杜劲超,罗辞勇,肖洪伟,周洪宇.基于最小电压法的超声换能器谐振频率自动跟踪*[J].应用声学,2013,32(5):336-340. |
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| 作者姓名： | 杜劲超 罗辞勇 肖洪伟 周洪宇 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室 重庆 400044,重庆大学输配电装备及系统安全与新技术国家重点实验室 重庆 400044,重庆大学输配电装备及系统安全与新技术国家重点实验室 重庆 400044,重庆大学输配电装备及系统安全与新技术国家重点实验室 重庆 400044 |
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| 基金项目： | 国家大学生创新性实验计划项目 |
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| 摘 要： | 首先分析了最大电流法跟踪超声换能器谐振频率的原理及应用范围。研究了基于由串联电感和并联电容匹配电路下,不同频率时换能器两端电压电流的变化规律。研究表明在串联电感和并联电容匹配电路下发生谐振时,换能器两端的电压最小而电流并非最大。由此形成了采用最小电压法跟踪谐振频率的自动跟踪策略,并给出了该方法的具体实施步骤。论文研究结果为换能器谐振频率的自动跟踪方法提供了新的选择。
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| 关 键 词： | 超声换能器 频率跟踪 最小电压法 匹配电路 |
| 收稿时间： | 2013/7/11 0:00:00 |
| 修稿时间： | 2013/8/23 0:00:00 |
Based on the minimum voltage method for resonant frequency automatic #$NLtracking of the ultrasonic transducer |
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| DU Jinchao,LUO Ciyong,XIAO Hongwei and ZHOU Hongyu.Based on the minimum voltage method for resonant frequency automatic #$NLtracking of the ultrasonic transducer[J].Applied Acoustics,2013,32(5):336-340. |
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| Authors: | DU Jinchao LUO Ciyong XIAO Hongwei and ZHOU Hongyu |
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| Institution: | State Key Laboratory of Power Transmission Equipment System Security and New Technology,#$NLChongqing University,State Key Laboratory of Power Transmission Equipment System Security and New Technology,#$NLChongqing University,State Key Laboratory of Power Transmission Equipment System Security and New Technology,#$NLChongqing University,State Key Laboratory of Power Transmission Equipment System Security and New Technology,#$NLChongqing University |
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| Abstract: | The principle and application of maximum current method to track resonant frequency of an ultrasonic transducer were analyzed at first. Based on the series inductance and shunt capacitance matching circuit, the voltage and current of the transducer over different frequencies were studied. Research results show that when resonance occurs under the series inductance and shunt capacitance matching circuit, the voltage of the transducer is the smallest and the current is not the largest. Therefore the minimum voltage method for automatic tracking resonant frequency was proposed and detailed implementation steps were presented. This research result provides a new choice for automatic tracking resonant frequency of the ultrasonic transducer. |
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| Keywords: | Ultrasonic transducer Frequency tracking The minimum voltage method Matching circuit |
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