摘要
详细讨论一种非接触检测系统中时域波形显示过程中 ,对叠加在人体呼吸、心跳信号中噪声进行压缩的方法 ,并对通过实验室中两种不同环境下噪声压缩阈值的研究 ,解决了时域图形显示过程中噪声水平随着AD数据采集卡的增益及软件显示增益增加的问题 ,实现了呼吸和心跳信号低噪声水平的显示。
A method for compressing the noises overlapping in the breath and heart signals of human beings,detected by the non-contact vital signs detecting system during the display of the waveforms in time domain,is discussed in this paper in detail.And what's more,the pro blem that the noise level is changed along with the increase of the gain of AD data-acquisition card and the display-gain of the software is solved by researching into the threshhold of noise-level contraction in two types of circumstance in the lab,and the result of the breath and heart signal in the condition of lower noise is realized as well.
出处
《中国医疗器械杂志》
CAS
2001年第6期316-317,366,共3页
Chinese Journal of Medical Instrumentation
