Pulse Detection And Display System Design

Pulse signal results from the interaction of heart, blood and vessels. It can reflect the entire circulatory system state of our body. With the development of Chinese Medicine, Signal Processing and Pattern recognition of Human Pulse become very important just because it can provide important physical information of human being.Combination of microelectronics, analogue electronics, digital electronics, MCU and computer technology, designed a pulse detection and display system. This paper describes the structure design, work theory, fabrication process of silicon pulse sensor. During the experiment, the I-V characteristic and pressure sensitive characteristic are tested; after that the static characteristic is analyzed. The experiment results indicate that the sensitivity of silicon pulse sensor is 162.26mV/100KPa, the linearity is±2.01%. The silicon pulse sensor meets the design demand. Also in this paper, we describe every interface circuits of the system, including the 8 Analog Input Channels and 12-bit data-acquisition system MAX197. Make and describe Serial communication protocol between MCU and PC. And based on this protocol accomplish serial communication software. In this article the mixed programming of MCU Software using C language and assembly language, which greatly improving the acquisition accuracy and efficiency of 3-way pulse parameters, also on this basis complete the stepper motor 3-DOF motion control; PC control software using Visual C + + platform, control and display interface friendly and efficient, also the Pulse figure and Pulse information can be preserved real-time.First of all, the article describes the design of the overall outlook, and then sub-sections on the various parts of the technical details of the design. Finally, some sound advice to improve the system.