Conception d’un prototype de bio-impédance périphérique autour d’un FPGA Virtex-5 LX30

The objective of this article is the design of a prototype allowing the determination of the cardiovascular parameters by a noninvasive method, the peripheral bioimpedance. The prototype is designed with the National Instruments PXI- 7841R data acquisition card, the NI PXI-1033 chassis, the NI SCB-68 connector block and the software of development, LabVIEW with its LabVIEW FPGA module. The core of the PXI-7841R is an FPGA target, the Xilinx Virtex-5 LX30. The configuration of FPGA was not made by VHDL but rather by graphic programming with the LabVIEW FPGA. This module offers the possibility of an easy, sure and fast design. The results of the design are very satisfactory and allowed us to have a completely reconfigurable and evolutionary system fulfilling the electric safety requirements of biomedical equipments. The system allows moreover the determination of several cardiovascular parameters and can be used as vital signs monitor.