| J-TEXT 偏振仪信号相位差实时计算方法研究 |
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| 引用本文： | 张 明,袁 涛,郑 玮,刘 洋,李 强,陈 志. J-TEXT 偏振仪信号相位差实时计算方法研究[J]. 核聚变与等离子体物理, 2015, 35(4): 308-313. DOI: 10.16568/j.0254-6086.201504004 |
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| 作者姓名： | 张 明 袁 涛 郑 玮 刘 洋 李 强 陈 志 |
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| 作者单位： | (1. 强电磁工程与新技术国家重点实验室，武汉 430074；2. 华中科技大学电气与电子工程学院，武汉 430074) |
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| 基金项目： | 国家磁约束核聚变能发展研究专项(2013GB113003)；中央高校基本科研业务费资助(0118131089) |
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| 摘 要： | 介绍了常用的相位差算法过零检测法、数字相关法和FFT 算法，对这三种算法的测试表明，三者均能在几十微秒量级的延时内较准确地获得计算结果，但所需的资源和时间开销有所不同。过零检测法占用的资源较多，但平均计算延时较小；FFT 资源占用率和延时均较大；而数字相关法资源占用率和延时均较小，但相位翻转的判断存在困难。
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| 关 键 词： | 相位差 过零检测法 数字相关法 FFT NI FlexRIO LabVIEW FPGA |
Phase shift real-time calculation method for J-TEXT polarimeter-interferometer signal |
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| ZHANG Ming,YUAN Tao,ZHENG Wei,LIU Yang,LI Qiang,CHEN Zhi. Phase shift real-time calculation method for J-TEXT polarimeter-interferometer signal[J]. Nuclear Fusion and Plasma Physics, 2015, 35(4): 308-313. DOI: 10.16568/j.0254-6086.201504004 |
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| Authors: | ZHANG Ming YUAN Tao ZHENG Wei LIU Yang LI Qiang CHEN Zhi |
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| Affiliation: | (1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology，Wuhan 430074； 2. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074) |
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| Abstract: | To calculate the phase shift, zero-crossing detection, digital correlation method and FFT are commonly used. Tests on the three algorithms show that, they can obtain phase shift accurately in dozens of microseconds delay, but resources and time cost are different. Zero-crossing detection needs more resources, but less time. FFT has large resource occupancy and latency. Digital correlation method is just the opposite to FFT, but detecting phase reverse is difficult. |
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| Keywords: | Phase shift Zero-crossing detection Digital correlation method FFT NI FlexRIO LabVIEW FPGA |
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