Study On Auto Control System Of Body Surface Temperature Under Radialization By Infrared Light

Radialization system of infrared light for human body surface is an intelligent auxiliary medical instrument. It's necessary to choose the accurate temperature therapy project for the various disorders and the various positions of the body during the therapy. In the thesis, through researching on the control methods of living tissue surface temperature under the infrared light, a control arithmetic of temperature based on dual-model fuzzy control system with parameters self-adjusting online is designed, which is used specially in control of human body surface temperature.In the thesis, firstly, it introduces what is moxibustion spectrum, and the bioeffects of all lights which form the moxibustion spectrum and how about their application in medical treatment. Secondly, a contactless measuring temperature method based on infrared ray has been adopted through researching and comparing many kind methods of measuring temperature.For solving the difficulty in controlling temperature when examining the tissue of human which is special in certain aspect as a controlled object, a general fuzzy controller and the control rules are designed, then the corresponding list for fuzzy control by fuzzy inference rules is determined. Based on that, in order to improve control capability of the general fuzzy controller, this paper designs a new fuzzy controller with parameters self-adjusting online. Combining this new fuzzy controller with switch control, a dual-model fuzzy temperature control system with parameters self-adjusting online is applied to our task. Subsequently, the rationality of the arithmetic about the controlling system was checked through simulating a first-order model with lag and inertia on this arithmetic by use of the fuzzy logic toolbox in Matlab; In order to check the robustness and adaptability of this controlling system, a further simulation research on controlled object whose parameters or structure are changed respectively is done.In this thesis, the hardware for the whole temperature controlling system is designed, and the controlling arithmetic by visual basic is programmed. At last, the whole debugging from temperature acquisition to output control is accomplished by use of one tungsten halide lamp as the infrared light source. Further more, after the experiment of controlling their temperature on living-tissue and decease-tissue finished, the corresponding varied temperature curves came into being. Referencing these curves, the controlling rules were amended, and the effect difference in the variant controlled objects was analyzed and compared.