| 基于DDS和DFT的水声换能器小信号阻抗测量 |
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| 引用本文： | 杨成伟,苗康乐,杨日杰.基于DDS和DFT的水声换能器小信号阻抗测量[J].海军航空工程学院学报,2011,26(2):165-168. |
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| 作者姓名： | 杨成伟 苗康乐 杨日杰 |
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| 作者单位： | 海军航空工程学院电子信息工程系,山东烟台,264001 |
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| 基金项目： | 航空科学基金资助项目，"泰山学者"建设工程专项经费资助项目 |
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| 摘 要： | 针对水声测量中换能器阻抗和功率放大器的匹配问题,以及换能器老化状况诊断的实际问题,利用DDS(直接数字合成)和DFT(离散傅里叶变换)技术,研究了使用小信号下换能器在不同频率点上的频率响应情况,通过执行多次测量,确定换能器的幅频响应特性曲线,以此分析换能器的老化情况,同时可以对功率放大器输出匹配电路设计提供参考.通过相...
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| 关 键 词： | 直接数字合成 离散傅里叶变换 换能器 阻抗测量 |
Research of Acoustic Transducer Small-Signal Impedance Measurement Base on the DDS and DFT |
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| YANG Cheng-wei,MIAO Kang-le and YANG Ri-jie.Research of Acoustic Transducer Small-Signal Impedance Measurement Base on the DDS and DFT[J].Journal of Naval Aeronautical Engineering Institute,2011,26(2):165-168. |
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| Authors: | YANG Cheng-wei MIAO Kang-le and YANG Ri-jie |
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| Institution: | (Department of Electronic and Information Engineering,NAAU,Yantai Shandong 264001,China) |
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| Abstract: | Considering the practical problem of matching the acoustic transducer impedance to the power amplifiers and diagnosis of the aging status of the acoustic transducer,using DDS（Direct Digital Synthesizers） and DFT（Discrete Fourier Transform） technique,the frequency response of transducer under small-signal at different frequency point was studied.By performing multiple measurements to determine the transducer frequency response curves,the aging status of the transducer was analyzed and the information for the power amplifier circuit design was provided.Through the relevant principles of analysis,the impedance measurements circuit was designed,the software for test was written.After being debugged,the circuit in the system worked correctly and successful in the small-signal impedance measurement.At last,the related factors impact of the transducer impedance measurements were analyzed. |
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| Keywords: | DDS DFT transducer impedance measurement |
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