Development Of Computer Control System For Numerical Control Three-Dimension Lumbar Disease Curer

During studying for master degree, the author concentrated the research work on developing control system for Numerical Control Three-Dimension Lumbar Disease Curer (NCTDLDC). Now present all of the author's research work in this thesis.In fact, NCTDLDC is a three-axis CNC system. Several aspects of the research are presented here.Due to its reliability, versatility and ease-to-use, CNC systems are not only used in numerical control machine tools but also widely used more and more in other fields.There were the shortcomings that the treating parameters are not accurate on traditional Three-Dimension Lumbar Disease Curer (TDLDC). The CNC system can fulfill the control of the required accurate distance and angles during treating control. The control system and its software of NCTDLDC were presented in this paper which based on the motion requirements of traditional Chinese physical treatment about lumber diseases. On the basis of the characteristics of this curer used in hospital and it is operated by doctors who has no knowledge on CNC, so "IPC+CNC" was selected as hardware platform and "VC++ language +PLC code + CNC code" as the software platform. The software adopts modular design method with friendly human-computer interface. Operators need merely handle the computer which is the upper computer in operation, and the CNC system takes charge of the motion control during treatment. With I/O cards, the communication between IPC and CNC was realized. The control software programmed in Visual C++ has the function of showing the treating motion, which can be easily used by the doctors who have received training. Through the VC programming the control system achieved to manage the case history and to communicate between the upper computer and CNC. And through the PLC and G-code programming, CNC system finished the anticipant control motion.As a clinical medical treatment facility using in hospital, there are enough distance limits to ensure the patient's absolute security in TDLDC. The first distance limits are provided by the control software to ensure that the inputs are not beyond the limits. The second distancelimits are set in the CNC axis parameter table. When the encoders' feedbacks exceed the settings, the CNC system will give overrun warning and stop motion at once. The third are the electric limits. When any direction of the six motions reaches the limit switch, the system will give overrun warning and stop moving. The last distance limits are the mechanical limit and also the securest ones, which ensure the distance within the right limit by the bed's structure.Electrocardiograph is an important index of the patient's health status, so it is usually a basic method in diagnosing the heart rate abnormity. Comparing the patient's ECG which is collected both before and in the course of the treatment, doctors can get some useful information about the patient's health. So the ECG functional module was integrated in this TDLDC, which was independent from the other functions. This module can be used as the ECG machine to observe, record, query and print the ECG.Through the control test, the computer control system fulfilled the motion requirement and worked successfully. In the conclusion part of this paper the author summed up the research work and gave some advice on the future betterment work.