| 雷达式生命探测仪中人体数量识别技术的研究 |
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| 引用本文： | 路国华,杨国胜,王健琪,荆西京.雷达式生命探测仪中人体数量识别技术的研究[J].北京生物医学工程,2005,24(1):29-32. |
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| 作者姓名： | 路国华 杨国胜 王健琪 荆西京 |
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| 作者单位： | 第四军医大学生物医学工程系,西安,710032;第四军医大学生物医学工程系,西安,710032;第四军医大学生物医学工程系,西安,710032;第四军医大学生物医学工程系,西安,710032 |
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| 基金项目： | 第四军医大学校科研和教改项目 |
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| 摘 要： | 针对雷达式生命探测仪穿墙检测到人体的呼吸信号的非平稳特性,采用短时傅里叶变换、频谱图,对单人、多人的呼吸信号进行分析,并通过奇异值分解有效地提取特征矢量进行模式识别,能够成功地识别单人和多人.实验结果表明,基于短时傅里叶变换的奇异值分解法能够稳定、有效地提取特征矢量,从而达到对雷达式生命探测仪中人体数量的较准确地识别.
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| 关 键 词： | 雷达式生命探测仪 短时傅里叶变换 频谱图 奇异值分解 模式识别 |
| 文章编号： | 1002-3208(2005)01-0029-04 |
| 修稿时间： | 2004年5月17日 |
Study on the Technology to Recognize the Number of the People by Means of Life-Detector Based on Radar |
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| LU Guohua,YANG Guosheng,WANG Jianqi,JING Xijing. Biomedical Engineering.Study on the Technology to Recognize the Number of the People by Means of Life-Detector Based on Radar[J].Beijing Biomedical Engineering,2005,24(1):29-32. |
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| Authors: | LU Guohua YANG Guosheng WANG Jianqi JING Xijing Biomedical Engineering |
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| Institution: | LU Guohua,YANG Guosheng,WANG Jianqi,JING Xijing. Biomedical Engineering Department,Fourth Military Medical University,Xi'an,Shanxi province 710032 |
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| Abstract: | To recognize the number of the people using the life-detector based on radar when penetrating the wall, a respiration signal identification method based on short time fourier transform (STFT) is presented in this paper. To fully utilize the nonstationary character of the respiration signal, STFT is employed to get the signal's time-frequency representation. Singular value decomposition (SVD) is then used in the spectrogram to extract feature vector for pattern identification. Single people and multi-people can be identified from the respiration sensed by the life-detector based on radar. Experimental results show that the method based on STFT and SVD is stable and efficient to identify the number of the people. |
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| Keywords: | life-Detector based on radar STFT spectrogram SVD pattern identification |
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