Three-dimensional Dynamic Interference Current Therapyinstrument Based On FPGA

With the improvement of people’s living standard and the enhancement of health consciousness, people pay more and more attention to physical therapy. Interference current therapy refers to two or more sets of different frequency of the intermediate frequency current cross into the human body, the human body to produce interference of low frequency interference current, using the method of treatment of diseases of the interference current. Stereo dynamic interferential therapy is developed based on the traditional interference electrotherapy and dynamic interference current therapy on the road, it will be three if current cross to enter the human body, the 3D field three-dimensional form in the body. At the same time frequency amplitude modulation to three current, stimulating effect of dynamic and multi-direction, multi-site, multi-angle and multi-shape, has analgesic, improve local blood circulation and cause nerve muscle excitation function.Based on the study of the latest achievements of the traditional interference electrotherapy instrument and overseas, we propose and design a three dimensional dynamic interference current therapy instrument based on FPGA. The user through the industrial interface touch screen human-computer interaction, selection of treatment plan; using STM32 as the main controller for the command parsing, is also responsible for the parameters sent to FPGA; the core element of FPGA is the Altera company’s Cyclone II series of products, design of sweep frequency, wave-form generation, modulation and amplitude modulation module, realizes the adjustable treatment the waveform of the frequency modulation, amplitude modulation and frequency difference frequency.The main contents of this paper are as follows:(1) Through the research on the interference of electric therapeutic instrument at home and abroad, put forward the system architecture based on FPGA;(2) On the technology and digital modulation technique of DDS waveform based on FPGA;(3) The design and implementation of STM32 based controller, the main control circuit board of FPGA as the core unit;(4) The design and implementation of touch screen controller program design, program design and development of FPGA chip;(5) The system output waveform has been tested comprehensively, and the clinical verification, the results show that the design is feasible Key WordsInterference current FPGA STM32 DDS Amplitude modulation...