Design And Implementation Of AV Impulse System Based On TCP/IP Protocol

Deep-vein thrombosis (DVT) was hard to be seen in the 1960's. As rapid development of vasal surgery all over the world and extensive application of advanced diagnostic technology, DVT was examined more and more, and became a familiar disease from 1980's. DVT usually happens concomitantly with serious syndromes. One of its syndromes, PTE, for example, is very dangerous to people's health or even life. DVT often appears after surgery, and is hard to be diagnosed, so prevention is more important than treatment. Preventive and therapeutic methods like medicine are widely used, but the effects are not so satisfying. Therefore, people gradually pay more attention to safe and effective mechanical methods, which currently become the hotspot of research and application.Based on TCP/IP protocol, AV impulse system was designed. This system utilizes AT89S53 as central-controlling chip, and includes interactive module, memory module, power module, driver module, data acquisition module, and network communications module. Additionally, gas compressor, gas kettle, and rubber pipe are also attached to this device. By mimicking blood circulation in people's legs when walking, AV impulse system is aimed to prevent and cure DVT. In many countries, some systems like AV impulse system, as healing instrument, have already been fixed to sickbeds, and relating network care is also widely used. Unfortunately, there is no such system like this in China. In order to adapt this trend, network module of AV impulse system has been designed in this project. Instead of going out to check every ward, the nurse can just sit in the control room and conveniently manage all systems in sickrooms through the network, by so doing, it not only saves labor resources, but also reduces unnecessary disturbance to patients.In this paper, the characteristics of vein circulation have been analyzed. The pathology of DVT and the preventive and therapeutic methods have been researched. Based on physiology and clinical experience of DVT, typical parameters for the AV impulse system have been given. The design of the whole system has been finished. The design of the hardware and software has been introduced in detail. The network module has been designed for the system in order to connect the LAN of hospital and control other devices in long-distance. TCP/IP protocol is introduced briefly. Furthermore, according to the requirements of data transmission in this system, I make proper abridgement and adjustment toward TCP/IP protocol. Design and implementation both in hardware and software of joint between Ethernet and RTL8019AS controlled by chip computer STC89C58RD+ are introduced in detail.Finally, AV impulse system based on TCP/IP protocol has been examined. The function of preventing and treating has been realized and the system can be connected to the network. The AV impulse system has been working very well.