针对DC-DC变换电路差模传导电磁干扰信号难以提取的问题,通过分析直流人工电源网络(DCLISN,DC line impedance stabilization network)的网络特性,建立基于PSpice的差模传导干扰预测模型。该模型采用的DC-LISN可实现直流信号的正向传输...针对DC-DC变换电路差模传导电磁干扰信号难以提取的问题,通过分析直流人工电源网络(DCLISN,DC line impedance stabilization network)的网络特性,建立基于PSpice的差模传导干扰预测模型。该模型采用的DC-LISN可实现直流信号的正向传输、高频干扰信号在测试段无衰减提取的功能。通过PSpice仿真和实验分别提取了电源侧差模传导干扰的时域波形并进行频谱分析,结果表明,基于DCLISN的PSpice差模传导干扰预测模型与实际测试结果在幅值和频谱成分方面吻合较好,从而证明了该模型对预测实际变换器产生的差模干扰是有效的。展开更多
Based on attenuated total reflection （ATR） and thermo-optic effect, the polymeric thin film planar optical waveguide is used as the temperature sensor, and the factors influencing the sensitivity of the temperature ...Based on attenuated total reflection （ATR） and thermo-optic effect, the polymeric thin film planar optical waveguide is used as the temperature sensor, and the factors influencing the sensitivity of the temperature sensor are comprehensively analyzed. Combined with theoretical analysis and experimental investigation, the sensitivity of the temperature sensor is related to the thicknesses of the upper cladding layer, the waveguide layer, the optical loss of the polymer material and the guided wave modes. The results show that the slope value about reflectivity and temperature, which stands for the sensitivity of the polymer thin film temperature sensor, is associated with the waveguide film thickness and the guided wave modes, and the slope value is the highest in the zero reflectance of a certain transverse electric （TE） mode. To improve the sensitivity of the temperature sensor, the sensor＇s working incident light exterior angle α should be chosen under a certain TE mode with the reflectivity to be zero. This temperature sensor is characterized by high sensitivity and simple structure and it is easily fabricated.展开更多
文摘针对DC-DC变换电路差模传导电磁干扰信号难以提取的问题,通过分析直流人工电源网络(DCLISN,DC line impedance stabilization network)的网络特性,建立基于PSpice的差模传导干扰预测模型。该模型采用的DC-LISN可实现直流信号的正向传输、高频干扰信号在测试段无衰减提取的功能。通过PSpice仿真和实验分别提取了电源侧差模传导干扰的时域波形并进行频谱分析,结果表明,基于DCLISN的PSpice差模传导干扰预测模型与实际测试结果在幅值和频谱成分方面吻合较好,从而证明了该模型对预测实际变换器产生的差模干扰是有效的。
基金The National Natural Science Foundation of China(No.60977038)the Specialized Research Fund for the Doctoral Program of Higher Education(No.20110092110016)+1 种基金the National Basic Research Program of China(973Program)(No.2011CB302004)the Foundation of Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education of China(No.201204)
文摘Based on attenuated total reflection （ATR） and thermo-optic effect, the polymeric thin film planar optical waveguide is used as the temperature sensor, and the factors influencing the sensitivity of the temperature sensor are comprehensively analyzed. Combined with theoretical analysis and experimental investigation, the sensitivity of the temperature sensor is related to the thicknesses of the upper cladding layer, the waveguide layer, the optical loss of the polymer material and the guided wave modes. The results show that the slope value about reflectivity and temperature, which stands for the sensitivity of the polymer thin film temperature sensor, is associated with the waveguide film thickness and the guided wave modes, and the slope value is the highest in the zero reflectance of a certain transverse electric （TE） mode. To improve the sensitivity of the temperature sensor, the sensor＇s working incident light exterior angle α should be chosen under a certain TE mode with the reflectivity to be zero. This temperature sensor is characterized by high sensitivity and simple structure and it is easily fabricated.
