机械制造与自动化2024，Vol.53Issue(3)：25-31,7.DOI:10.19344/j.cnki.issn1671-5276.2024.03.005
电阻抗成像系统中采样信号电路的设计与实验验证
Design and Experimental Verification of Sampling Signal Circuit in Electrical Impedance Imaging System
摘要
Abstract
This study delves into a key technology of electrical impedance tomography(EIT)-the implementation of signal sampling electronic circuit.The basic principles and technical requirements of the circuit are elaborated in detail,and advanced circuit design concepts and techniques are adopted to design a set of hardware circuits for lung ventilation visualization electrical impedance imaging equipment based on a high-performance FPGA dual-drive system,which mainly includes a sampling control unit,a voltage-controlled constant-current source module,a time-multiplexing module,differential amplification circuits and a safe voltage-tolerant isolation module unit.The method of signal acquisition using the control unit and time division multiplexing module is also discussed.And the experimental tests verify that the designed EIT hardware circuit is of high precision and good stability in signal acquisition process,and can meet the needs of clinical lung ventilation imaging.关键词
电阻抗成像/信号采样/EIT硬件电路Key words
electrical impedance imaging/signal sampling/EIT hardware circuit分类
信息技术与安全科学引用本文复制引用
徐成喜..电阻抗成像系统中采样信号电路的设计与实验验证[J].机械制造与自动化,2024,53(3):25-31,7.基金项目
中央引导地方科技发展资金项目(236Z7731G) （236Z7731G）
