由于常规的变压器油色谱数据传输方法未进行编码处理导致传输效果不佳,文章设计一种基于正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)载波通信技术的变压器油色谱数据传输方法。利用色谱分析仪获取数据,进行归一化...由于常规的变压器油色谱数据传输方法未进行编码处理导致传输效果不佳,文章设计一种基于正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)载波通信技术的变压器油色谱数据传输方法。利用色谱分析仪获取数据,进行归一化处理和特征提取,以获取数据的关键信息,并对其进行编码。计算数据的覆盖范围,并根据覆盖情况制定合适的传输协议。在OFDM支持下评估信道质量,根据信道状况分配子载波,动态调整分配结果,计算传输频率,实现高效的数据传输。实验结果表明,该方法误码率低,传输效果较好。展开更多
A Data Acquisition System （DAQ） for electron energy loss coincident spectrometers （EELCS） has been developed. The system is composed of a Multiplex Time-Digital Converter （TDC） that measures the flying time of p...A Data Acquisition System （DAQ） for electron energy loss coincident spectrometers （EELCS） has been developed. The system is composed of a Multiplex Time-Digital Converter （TDC） that measures the flying time of positive and negative ions and a one-dimension positionsensitive detector that records the energy loss of scattering electrons. The experimental data are buffered in a first-in-first-out（FIFO） memory module, then transferred from the FIFO memory to PC by the USB interface. The DAQ system can record the flying time of several ions in one collision, and allows of different data collection modes. The system has been demonstrated at the Electron Energy Loss Coincident Spectrometers at the Laboratory of Atomic and Molecular Physics, USTC. A detail description of the whole system is given and experimental results shown.展开更多
文摘由于常规的变压器油色谱数据传输方法未进行编码处理导致传输效果不佳,文章设计一种基于正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)载波通信技术的变压器油色谱数据传输方法。利用色谱分析仪获取数据,进行归一化处理和特征提取,以获取数据的关键信息,并对其进行编码。计算数据的覆盖范围,并根据覆盖情况制定合适的传输协议。在OFDM支持下评估信道质量,根据信道状况分配子载波,动态调整分配结果,计算传输频率,实现高效的数据传输。实验结果表明,该方法误码率低,传输效果较好。
基金National Natural Science Foundation of China (Nos. 10134010 and 10004010)
文摘A Data Acquisition System （DAQ） for electron energy loss coincident spectrometers （EELCS） has been developed. The system is composed of a Multiplex Time-Digital Converter （TDC） that measures the flying time of positive and negative ions and a one-dimension positionsensitive detector that records the energy loss of scattering electrons. The experimental data are buffered in a first-in-first-out（FIFO） memory module, then transferred from the FIFO memory to PC by the USB interface. The DAQ system can record the flying time of several ions in one collision, and allows of different data collection modes. The system has been demonstrated at the Electron Energy Loss Coincident Spectrometers at the Laboratory of Atomic and Molecular Physics, USTC. A detail description of the whole system is given and experimental results shown.
