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A high-speed bioelectrical impedance spectroscopy system based on the digital autobalancing bridge method
journal contribution
posted on 2023-06-08, 15:06 authored by Nan Li, Hui Xu, Wei Wang, Zhou Zhou, Guofeng Qiao, David Day-Uei LiA novel bioelectrical impedance spectroscopy system based on the digital auto-balancing bridge method improved from the conventional analogue auto-balancing method is presented for bioelectrical impedance measurements. The hardware of the proposed system consists of a reference source, a null detector, a variable source, a ?eld programmable gate array, a clock generator, a ?ash and a USB controller. Software implemented in the ?eld programmable gate array includes three major blocks: clock management, peripheral control and digital signal processing. The principle and realization of the least-mean-squares-based digital auto-balancing algorithm is introduced in detail. The performances of our system were examined by comparing with a commercial impedance analyzer. The results reveal that the proposed system has high speed (less than 3.5 ms per measurement) and high accuracy in the frequency range of 1 kHz–10 MHz. Compared with the commercial instrument based on the traditional analogue auto-balancing method, our system shows advantages in measurement speed, compactness and ?exibility, making it suitable for various bioelectrical impedance measurement applications.
History
Publication status
- Published
File Version
- Published version
Journal
Measurement Science and TechnologyISSN
0957-0233Publisher
Institute of PhysicsExternal DOI
Volume
24Page range
065701Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes