基于柔性阵列传感器的脉象检测系统

发布时间：2018-10-29 20:57

【摘要】：脉诊是中国传统医学最主要的诊断方法之一,有着非常悠久的历史和独特的创造性。然而传统中医脉诊的主观性很强,往往缺少定量数据的支持。在现代医学越来越重视定量化、客观化的背景下,仅凭医生个人切脉进行诊断的中医脉诊很难为西方医学所认可,更无法将中医脉诊推向国际化。因此,如何按中医理论提取脉象成为工程学必须要解决的问题。本文针对这一问题研制了基于柔性阵列传感器的脉象检测系统。本论文用硅胶制作了专门的脉搏换能器。它由七路圆柱式的半封闭腔体构成,能与皮肤良好接触,避免了刚性探头在长期采集过程中对受试者皮肤的挤压或损伤；设计了压力控制系统,对取脉压力进行监测与控制,实现了最佳取脉压力下的脉象采集；采用气压传导的方式来感知脉搏搏动,并在此基础上搭建了相应的信号处理电路,完成了对脉象信号的提取、放大；以USB-7660为核心构建了A/D采集系统,实现了对多路脉象信号的显示、存储。最后,对样机进行了联机调试和标定,完成了样机准确性、重复性的实验论证以及最佳脉图的获取。实验表明,该系统不仅可以有效采集到受试者的七路二维脉图,而且能清晰地观测到受试者的脉道宽度,并重建出相应脉搏波的三维传导地形图。本文研究的基于柔性阵列传感器的脉象检测系统的创新点在于设计了模拟指尖取脉的柔性脉搏换能器,并采用气压传导的方式,实现了对多路脉象信号的采集,为中医的客观化、可视化研究提供了新方法。
[Abstract]:Pulse diagnosis is one of the most important diagnostic methods in traditional Chinese medicine, which has a long history and unique creativity. However, the subjectivity of pulse diagnosis in traditional Chinese medicine is very strong, which often lacks the support of quantitative data. Under the background of modern medicine paying more and more attention to quantification and objectification, it is difficult to recognize the pulse diagnosis of traditional Chinese medicine based on doctors' individual pulse cutting, let alone to push the pulse diagnosis of traditional Chinese medicine to internationalization. Therefore, how to extract pulse according to TCM theory has become a problem that must be solved in engineering. In this paper, a pulse detection system based on flexible array sensor is developed. In this paper, a special pulse transducer is made with silica gel. It is composed of a seven-channel cylindrical semi-closed cavity, which can contact well with the skin and avoid the compression or injury of the skin by the rigid probe during the long period of acquisition. A pressure control system is designed to monitor and control the pulse extraction pressure. The pulse pulsation is sensed by the way of air pressure conduction, and the corresponding signal processing circuit is set up on the basis of which, the pulse signal is extracted and amplified. An A / D acquisition system based on USB-7660 is constructed to display and store multi-channel pulse signals. Finally, the prototype is debugged and calibrated online, and the accuracy and repeatability of the prototype are demonstrated and the best pulse diagram is obtained. The experimental results show that the system can not only collect the seven channels 2-D pulse map effectively, but also clearly observe the pulse width of the subject, and reconstruct the three-dimensional conduction topographic map of the corresponding pulse wave. The innovation of the pulse detection system based on flexible array sensor in this paper is to design a flexible pulse transducer which simulates the pulse at the fingertip, and realizes the acquisition of multi-channel pulse signals by the way of air pressure conduction. It provides a new method for the objectification and visualization of TCM.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R318.0;R241

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