The Key Technologies Of The Ventilator

The ventilator is one of the most necessary rescue equipments in hospital, and the important tool can lengthen the life and strive for the precious time for the further treatment. In the recent decade, the modern ventilator developed quickly with the research of machinery ventilated technologies, the application of new technologies and the improvement of clinic requests. But at present the ventilators especially made in china have some gaps in precision, comfort and reliability. This topic goal is to design a ventilator that can be easy to operate and carry on the accurate reliable monitoring to the patient, through the technologies of digital signal processing and liquid crystal display and the proper choice of sensors.The main work of this paper is to investigate and realize the ventilator signal monitoring system. The main contents in this paper include:First chapter mainly introduced the topic research background and the significance, especially introduced the machinery ventilated technology, digital signal processing technology and liquid crystal display technology, which are the basic theories of this paper.The second chapter mainly introduced the system specific request, and made a preliminary discussion on the system design overall frame, explained the main work of system design.The third chapter mainly introduced the gauging examination method of gas flows and some effect factors to the current capacity examination. Finally introduced the current capacity examination method and the hardware choice.The fourth chapter designed the system hardware electric circuit, according to the design purpose of the system ,and described the function and the connection of the hardware electric circuit and the division of address resources, which made a foundation for the software design.The fifth chapter mainly introduced the system software design and the realization, introduced the sampling signal spectral analysis and the filter design with...