Study And Design Of Laser Acupuncture Instrument Based On PID Control

Acupuncture originated in China. Due to the potential strength of its own: a kind of whole and natural therapy, special effects, can cure many diseases that the western medical science feels helpless, easily combined with science and technology, no side-effect, Acupuncture has become very popular in the world.However, some accidents may appear in clinical, such as: bent needle, stuck needle, broken needle, fainting, and hurting important organs. And some points are hard to puncture, such as: shengque and ruzhong. Meanwhile metal needles are used to puncture points to get therapeutic effect in traditional acupuncture, which may cause blood infection. Especial, in the face of AIDS and other blood-infect diseases, traditional acupuncture become loss.Laser acupuncture has been widely used in clinical and achieved good clinical effect as its free-pain, non-bacterium, non-invasion, safety, smart application and convenient operation.In this thesis, an intelligent laser acupuncture therapeutic instrument, which is powerful, convenient, low cost and popular, is designed based on the effect of laser acupuncture and traditional Chinese medicine theory. First, the generation and development history, actualities and subsistent problems of laser acupuncture and medical foundation of laser acupuncture are introduced. Second, the mechanism of laser acupuncture is discussed. The control of security laser radiation dose is studied after the analysis of effects of laser acupuncture and its clinical research. Based on theory above and combined with traditional Chinese medicine theory, procedures of security radiation dose control are designed. Meanwhile PID control theory is introduced and used to control the LD driver. Then combined with optical system design, reinforcement and reduction of traditional acupuncture is implemented. Finally software and hardware are designed, and waveforms are collected by applyingvirtual instrument. At the end of this paper, system simulation is done based on the least-squares method system modeling, and simulation waveforms are obtained. The laser acupuncture instrument in this thesis can implement the reinforcement and reduction of traditional acupuncture, which the existing laser acupuncture therapy can not be achieved. Digital PID is used to do a closed-loop control of the laser power output, which improved the stability of the instrument. MSP430 microcontroller system, which is highly integrated and ultra low power loss, is used as the control centre of the instrument. This instrument has many excellences like low cost, smart application, convenient operation and safety. With the unique security laser radiation dose control, this instrument is very safe and convenient for public use and appropriate to promote public health care.