数字化生物电阻抗成像系统

Digitalized Biological Electrical Impedance Tomography System

本文针对生物电阻抗成像技术中模拟滤波及解调环节存在的速度瓶颈和精度问题,设计了数字化生物电阻抗成像系统。系统基于DSP与FPGA协同运行,为硬件升级改进提供了开发空间;研究了基于Cyclone芯片的数字滤波以及数字解调算法;对算法进行了基于Testbench的仿真。系统仿真调试结果表明,该设计提高了系统成像速度和精度。

To solve the bottleneck of imaging speed and the issuing of precision for analogue tilter and analogue demodulation of biological electrical impedance tomography, this paper designed the digitalized system of biological electrical impedance tomography. The designed system is based on the combination of DSP and FPGA to provide space for the future upgrading of hardware, which includes the digital tilting and the digital demodulating algorithm on the basis of the Cyclone chip and simulates the algorithms above based on Testbench. The resuhs of simulation and system debugging show that the design can improve the speed and the precision of the imaging process.