| X-ray machine has been widely used in clinical medicine, which is one of the major medical equipment. It can be clearly taken out of the injury and disease, and provides an important diagnosis basis for doctor. Traditional X-ray machine has many defects such as single function, poor quality of image acquisition and obsolete control mode. As the reform of medical system, the basic-level hospitals needs to be equipped with high performance, affordable medical equipment. The X-ray machine develops in the tendency of proprietary, digital and multi-function recently. Multi-function X-ray machine has become a research focus of scientific research institutions and medical enterprise at home and abroad.In the paper, according to the clinical demand and the development direction, we design a set of mechanical control system applied Multi-function digital X-ray machine by analyzing the defects of traditional X-ray machine on the function and performance and considering stability, economy and expansibility, including the hardware, software and the electrical power distribution system design in detail. In this paper, the main work includes:1. According to the analysis of the development of X-ray machine and the research status about the X-ray products at home and abroad, we choose the Multi-functional digital X-ray machine control system as the research object and illustrates the aim, significance and contents of the task in the first chapter.2. Through the discussion of the whole structure of Multi-function digital X-ray machine and the analysis of the features and advantages of the Multi-function machine, we establish the overall scheme of the control system based on STM32 control chips, motor and detection device, and analyses the control objects, the functional requirements, device selection and so on key issues.3. In terms of hardware, according to the mechanical and electrical integration of elements of the system, the whole control system can be divided into the human-computer interaction system, the subordinate control system, detection system, motor drive and execution system. The human-computer interaction and the lower machine used as its hardware control platform. And also achieve the effective isolation control part and power part. The RS485 bus connects the human-computer interaction system and the subordinate control system. Hardware circuit part of control system mainly includes STM32F103 minimum system, liquid crystal display and key input circuit, power circuit, optical coupling isolation circuit, sensor circuit, serial communication circuit and relay control circuit, system startup circuit, motor drive circuit, power supply circuit, etc.4. In terms of software, the functional requirements of control system is firstly described, then the program flow chart of the human-computer interaction system and lower computer software are given, ultimately, the software and hardware of the system are debugged together. We choose the RVMDK integrated development environment and applying the idea of modularization to write drivers. The host computer and the slave computer carry out the correspondence through RS485 communication. Software design mainly includes the program design flow, system initialization, key presses, position detection, liquid crystal display, RS485 communication program design, etc.5. In the end, we design the electrical control cabinet, including the design of the electrical schematic diagram, layout of the electrical design and electrical system wiring. The system debugging, reliability analysis and system application value are described at the end of this paper.After the debugging and the clinical application, it indicates that it is feasible design. The control system has reliable operation, perfect function and easy operation. It provides the functionality needed to solve integration requirements and enhance the quality of clinical diagnosis. |
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