基于FPGA的宽频超声波电源频率跟踪系统设计
发布时间：2018-12-23 20:32
【摘要】：针对传统超声波电源无法驱动及锁频不同谐振频率段的换能器,实现不了宽频域内的锁相和频率跟踪的问题,设计了一种基于FPGA的具有自动频率搜索与跟踪、动态匹配不同谐振频率换能器的宽频域超声波电源。根据换能器的阻抗特性曲线,设计出动态步长的宽频域频率搜索方法,快速跟踪到换能器的谐振频率,并根据反馈电路的电压电流相位差,实时调整输出频率,锁定整个系统工作在谐振状态。实验结果表明,设计的宽频域超声波电源频率搜索快、跟踪准,动态匹配换能器适应性好。
[Abstract]:Aiming at the problem that the traditional ultrasonic power supply can not drive and lock the transducer with different resonant frequencies, the phase locking and frequency tracking in the wide frequency domain can not be realized. A kind of automatic frequency search and tracking based on FPGA is designed. The ultrasonic power supply in wide frequency domain is dynamically matched with different resonant frequency transducers. According to the impedance characteristic curve of the transducer, a wide frequency search method with dynamic step size is designed to track the resonant frequency of the transducer quickly. According to the voltage and current phase difference of the feedback circuit, the output frequency is adjusted in real time. Lock the whole system working in a resonant state. The experimental results show that the designed ultrasonic power supply in wide frequency domain has the advantages of fast frequency searching, accurate tracking, and good adaptability to dynamic matching transducers.
【作者单位】： 江苏科技大学电子信息学院;
【分类号】：TN86
本文编号：2390225
[Abstract]:Aiming at the problem that the traditional ultrasonic power supply can not drive and lock the transducer with different resonant frequencies, the phase locking and frequency tracking in the wide frequency domain can not be realized. A kind of automatic frequency search and tracking based on FPGA is designed. The ultrasonic power supply in wide frequency domain is dynamically matched with different resonant frequency transducers. According to the impedance characteristic curve of the transducer, a wide frequency search method with dynamic step size is designed to track the resonant frequency of the transducer quickly. According to the voltage and current phase difference of the feedback circuit, the output frequency is adjusted in real time. Lock the whole system working in a resonant state. The experimental results show that the designed ultrasonic power supply in wide frequency domain has the advantages of fast frequency searching, accurate tracking, and good adaptability to dynamic matching transducers.
【作者单位】： 江苏科技大学电子信息学院;
【分类号】：TN86
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