Study On Human Body Impedance Measurement System Based On Cartesian Coordinate Robot

As a nondestructive testing technology, the detecting of bioelectrical impedance has been widely used in biomedical engineering. While the measurement of impedance at meridians and acupuncture points, which is an crucial research direction of it , is of vital importance for both theory and clinical application and to promote the study on meridians and acupuncture points. The Back-Shu points of human body always reflects the health of human according to the Chinese Traditional Medical's Theory, which make it become the mainly focused acupuncture points in the research field of meridian. For the sake of the straight line local of the Back-Shu points, the straight line mode of measurement was used for the measurement of the bio-impedance. An impedance measuring system based on computer-controlled Cartesian Robot was designed and implemented and with which the electrical property of meridians and acupuncture points were investigated.The main research of this dissertation content includes: 1) the principle of bioelectrical impedance measurements. The developing history, current situation, research directions and the basic theory of bioelectrical impedance detection were studied. Meanwhile, the model and methods of human body impedance measurements and factors that influence stability and repetitiveness of detecting were discussed in details. 2) designing and construction of an impedance measuring system based on Cartesian-coordinate robot which is composed of mechanical part, drivers unit, control unit and data acquisition unit,etc. In addition, the hardware and software design also be included. The system supports various measuring modes, such as single acupuncture point, continuous and discrete points along meridian, and so on. To ease the extension, the software designed with great flexibility and expandability. 3) the experimental research of meridians and acupuncture points' impedance properties. Using the properties presented above, the repetitiveness of meridians and acupuncture points was analyzed. Finally, the effects of measuring parameters on impedance measurements were discussed.With the help of the Cartesian-coordinate robot detecting system that measures automatically, the impact brought by subjectivity is tremendously decreased, which eventually improves the efficiency and the stability and repetitiveness of the acquired data. Based on this general platform, we can do further research on relationship between diseases and impedance of meridian and acupuncture points, build the corresponding mathematic model, develop intelligent medical diagnostic system combined with advanced intelligent algorithms, which definitely have extensive prospect in application.