In order to extract the feature information of ultra wide-band (UWB) radio fuze target and give full play to the warhead's strike ability, a method based on polar Hough transform for scattering centers extraction ...In order to extract the feature information of ultra wide-band (UWB) radio fuze target and give full play to the warhead's strike ability, a method based on polar Hough transform for scattering centers extraction of the target was proposed in this paper. It firstly utilized the fuze scanning to obtain the distance and azimuth information of the target's main scattering centers at different times, i.e. the track information of scattering centers under the polar coordinates, then used the polar Hough transform to transform the track into the parameter space in order to accumulate the dots and drew 3-D parameter space diagram, in which the peak points corresponded to the target's scattering centers. The simulation results indicate that the method can not only extract scattering centers efficiently and accurately, but also has strong anti-noise performance, and the algorithm is simple and easy to be implemented in engineering.展开更多
针对在室温环境下探测瓦斯浓度,提出一种基于钯掺杂单壁碳纳米管(Pd-SWCNTs)的超宽带射频识别(UWB-RFID)传感器。传感器为薄型标签,由传感探头和电磁界面组成,其中传感探头为一PdSWCNTs加载的交叉指型电极(IDE);电磁界面由天线、微带线...针对在室温环境下探测瓦斯浓度,提出一种基于钯掺杂单壁碳纳米管(Pd-SWCNTs)的超宽带射频识别(UWB-RFID)传感器。传感器为薄型标签,由传感探头和电磁界面组成,其中传感探头为一PdSWCNTs加载的交叉指型电极(IDE);电磁界面由天线、微带线和终端负载组成。Pd-SWCNTs感知瓦斯浓度,引起IDE电流的变化,形成带隙幅度调制和带隙频率调制两种识别模式。当瓦斯浓度从0×10-6增加到100×10-6,基于带隙调幅调制的识别灵敏度为-9.32 d B;而基于带隙调频调制的识别灵敏度为-11.30 d B。展开更多
文摘In order to extract the feature information of ultra wide-band (UWB) radio fuze target and give full play to the warhead's strike ability, a method based on polar Hough transform for scattering centers extraction of the target was proposed in this paper. It firstly utilized the fuze scanning to obtain the distance and azimuth information of the target's main scattering centers at different times, i.e. the track information of scattering centers under the polar coordinates, then used the polar Hough transform to transform the track into the parameter space in order to accumulate the dots and drew 3-D parameter space diagram, in which the peak points corresponded to the target's scattering centers. The simulation results indicate that the method can not only extract scattering centers efficiently and accurately, but also has strong anti-noise performance, and the algorithm is simple and easy to be implemented in engineering.
文摘针对在室温环境下探测瓦斯浓度,提出一种基于钯掺杂单壁碳纳米管(Pd-SWCNTs)的超宽带射频识别(UWB-RFID)传感器。传感器为薄型标签,由传感探头和电磁界面组成,其中传感探头为一PdSWCNTs加载的交叉指型电极(IDE);电磁界面由天线、微带线和终端负载组成。Pd-SWCNTs感知瓦斯浓度,引起IDE电流的变化,形成带隙幅度调制和带隙频率调制两种识别模式。当瓦斯浓度从0×10-6增加到100×10-6,基于带隙调幅调制的识别灵敏度为-9.32 d B;而基于带隙调频调制的识别灵敏度为-11.30 d B。
