CN104146709B — 一种多频点生物电阻抗快速获取方法
Assigned to Hefei Institutes of Physical Science of CAS · Expires 2016-05-11 · 10y expired
What this patent protects
本发明公开了一种多频点生物电阻抗快速获取方法,基于DDS(Direct?Digital?Synthesizer,缩写为DDS)原理利用FPGA(Field-Programmable?Gate?Array,缩写为FPGA)编程实现一个多频点复合激励源V in ,复合激励源V in 同时加载到参考电阻R ref 和待测生物体电阻抗Z x 上,通过合理的选取采样频率f s 和数字傅里叶变换DFT的点数N,只需对V ref 、V x 在所需要的几个频点上进行DFT(Discrete?Fourier?Transform,缩写为DFT),即可准确获得V ref 、V…
USPTO Abstract
本发明公开了一种多频点生物电阻抗快速获取方法,基于DDS(Direct?Digital?Synthesizer,缩写为DDS)原理利用FPGA(Field-Programmable?Gate?Array,缩写为FPGA)编程实现一个多频点复合激励源V in ,复合激励源V in 同时加载到参考电阻R ref 和待测生物体电阻抗Z x 上,通过合理的选取采样频率f s 和数字傅里叶变换DFT的点数N,只需对V ref 、V x 在所需要的几个频点上进行DFT(Discrete?Fourier?Transform,缩写为DFT),即可准确获得V ref 、V x 在这些频点上对应的幅值Amp ref 、Amp x 与相角Deg ref 、Deg x ,进而获得待测生物体电阻抗Z x 在这些频点上的幅值。本发明具有阻抗获取精度高、运算量小、抗干扰能力强及扫描时间快等优点。
Drugs covered by this patent
- Abilify (aripiprazole) · Generic (originally Otsuka/BMS)
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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