基于AD5933阻抗测量芯片的人体经穴阻抗动态监测系统研制

摘要

Objective:To design the human body Meridian impedance dynamic testing system, to make clear the response of the human body Meridian impedance in the low frequency range. Methods: The system uses STM32F103RBT6 as a controller to read and write AD5933 internal registers in order to control the impedance measurement. Outer join ADG711 analog switch in order to achieve different range. Select SGM4782 as dual analog switch to strobe A,B two channels. Join in the constant current source based on AD844 between AD5933's Vout feet and Vin feet. Sample data is read into the PC via SD card.Results: The system can reflect the real-time impedance values and impedance curve under the sweep excitation from 1kHz to 128 kHz.Conclusion: The human body meridian dynamic impedance detection system based on AD5933 can accurately reflect meridian impedance information, and it can also be as a research tool to further defined meridian impedance characteristics.%目的：设计人体经穴阻抗动态经络监测系统，明确人体经穴阻抗在低中频范围内响应规律。方法：系统采用STM32系列单片机STM32F103RBT6作为控制器，对阻抗测量芯片AD5933内部寄存器读写从而控制阻抗测量，外接ADG711模拟开关以实现不同量程范围，选用SGM4782双路模拟开关选通A、B两个通道，并在AD5933芯片的Vout脚和Vin脚间加入基于AD844的恒流源，采样数据通过SD卡读入上位机并分析。结果：系统能够实时反映经穴阻抗在1～128 kHz扫频激励下阻抗曲线及数值。结论：基于AD5933阻抗测量芯片的人体经穴阻抗动态经络监测系统可以准确反映经穴阻抗信息，可作为进一步明确针灸经穴阻抗特性研究工具。