The Development Of Panel For Ventilator Based On The Electircal Activity Of The Diaphragm Trigger

As efficient equipment aiding for spontaneous breath, the ventilator has a very importantposition in modern medical equipment. Thus, a ventilator with high-precision, high-comfortand high-reliability is developed in this thesis, which utilizes the electrical activity of thediaphragm triggered as the base model, and supplements by a variety of trigger modes.First of all, a bi-MCU system architecture is proposed in this thesis based on the analysisof the function and technical demands of the ventilator system. Each MCU in the system takescharge of an independent function, and one is responsible for the panel which is the major partdiscussed in the dissertation. And a favorable GUI and a data communication interface is thekey to the design of the panel.Secondly, the hardware and software platforms are chosen after the design of systemarchitecture. In this stage, on one hand, hardware source of the supernatant applicationsoftware is analyzed, as well as the resource consumption point, so that the source of theARM kernel and peripheral interfaces are confirmed. On the other hand, we compare severaltechnical solutions and the idea of middleware is used to select the proper software platformbased on the hardware design of the system. Finally, LPC3250is decided as the kernel of thehardware platform and RTX embedded operation system is selected as the main solution.Next, related data communication interface is developed for the RTX embeddedoperation system, such as UART、 SPI、 Internet and USB. In the process of datacommunication interface development, we analyze characteristics of the hardware platformdata communication interface and design the related circuits. Then, after analysis ofbandwidth of the communication interface, hardware acceleration is proposed to resolve theproblems of bandwidth insufficiency. Finally, the integrated drive of the data communicationinterface is programmed and communication experiments have been done.At last, GUI system platform and application programs are introduced in details. In thepart of system platform, GUI structure is carried out on the basis of comparison amongvarious embedded GUI platform. The designed GUI displays physiological parameters andcurves for system value on the limited display space with rational distribution, which meetsthe demands and habits of medical staff.