Research On Control Circuit Of Pulse Treatment Instrument And FPGA Design

The pulse therapeutic device, which is an effectively therapeutic and health care facility, is applied extensively. According to the analysis of present clinical data, it is found that the pulse therapeutic device is able to improve patients’ symptoms, simultaneously avoiding the drug side effects and the pain from operations. Thus, it is meaningful to research this pulse therapeutic device that has several advantages, such as safety, noninvasive and convenience.In this paper, the treatment principle of pulse therapeutic device is researched. And based on the clinical data and test analyses, the affected part is stimulated by the impulse wave, which is commonly used in treatment and health care, to achieve the corresponding curative effects. Meanwhile, the additional thermal and medical therapies are put forward on the basis of electrotherapy, promoting the blood circulation and the drug absorption, further enhancing the treating effect. For the thermal therapy, in order to keep the temperature within a reasonable range, the fuzzy control algorithm is employed after researching the fuzzy control theory.For the researched pulse therapeutic device, the FPGA chip in the Cyclone IV series from Altera Co. is employed as the master controller, and the hardware description language, Verilog, is applied to design the control circuit based on the QuartusII11.0. The control circuit mainly contains the following three main modules:1, Waveform generator module. The waveform generator module allows for the outputs at different frequencies, such as square wave, saw-tooth wave, triangular wave, sinusoidal wave, rare wave, condensation wave, dilatational wave and combination wave. 2, Temperature control module of thermal therapy. The temperature sensor DS18B20 in the detection module is introduced to achieve the temperature control based on fuzzy control algorithm. 3, Human-computer interaction module. The keyboard input identification and LCD are controlled by the human-computer interaction module. Ultimately, in order to prove the feasibility of the designed control system, the integrated control circuit is downloaded to the development board to complete the online test and verification.