| 姚志刚，鲍信茹，李文石 |
(苏州大学 电子信息学院微电子学系, 江苏 苏州215021) |
 摘要：血氧超慢信号与脑神经递质的超慢振荡特点具有平行性与同源性。应用940 nm单波长近红外对管，检测识别耳颞穴的透射信息，可以帮助理解脑神经血管耦合的机制，同时发现新信号的特征以支持脑认知研究。具体工作包括:① 基于输出能量的最大值寻优探头传感角度；② 基于软件SPSS11.0统计描述谎实数据差异显著性的P分数；③ 利用Agilent54624A型示波器内嵌的FFT功能，提取近红外透射信息中0~100 mHz的超低频特征，以便显示谎和实的差异性。研究工作进一步细化了专用的近红外耳穴信息识别系统，为整机的SoC化奠定了基础。 |
| 关键词：耳穴;近红外;传感角度;P分数;超低频;脑神经递质 |
| 中图分类号：B84 文献标识码：A 文章编号：1000-8829(2008)04-0015-02 |
| Extraction and Analysis of Ultra-Low Frequency Components About Near-Infrared Auricular Signals |
| YAO Zhi-gang, BAO Xin-ru, LI Wen-shi |
| (Microelectronics Department,Soochow University,Suzhou 215021,China) |
| Abstract：The super-slow oxygen signals and the super-slow oscillation characteristics of brain neurotransmitters have the same characters in parallel and homology.With the near-infrared-probe in 940 nm wavelength to detect and recognize the information transmission of auricular-temporal points is very much helpful for understanding the mechanism of the neurovascular coupling,as well as discovering the new signal characters to support the cognitive brain research.These works include following three parts:① to find the best sensing angles of probes based on the maximum of the output energies;② to calculate the Pearson correlation coefficients with truth versus lie in the software SPSS11.0;③ to extract the ultra-low frequency components,0~100 mHz,by using the FFT function in Agilent54624A for showing the lie-truth ratio.These works further specify the dedicated recognition system of near-infrared auricular signals,which will make a great contribution to SoC. |
| Key words：auricular;near-infrared;sensing angle;Pearson correlation coefficient;ultra-low frequency;brain neurotransmitters |
|
|
