Specifications

ISSN: 02543087
CODEN: YYXUDY
Document type: Journal article (JA)
Publisher: Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China
Abstract: The excitation current source in bioimpedance spectroscopy (BIS) multi-frequency
synchronized fast measurement system must meet the special requirements of wide frequency
spectrum range, homogeneously distributed spectrum energy, synchronous phase and high
output impedance. This paper designs a periodical and two-valued nine-frequency synchronized
signal f(9, t) based on Walsh functions. f(9, t) includes nine primary harmonics at 1st, 2nd, 4th,
8th, 16th, 32nd, 64th, 128th and 256th harmonics, which have synchronous phase,
homogeneously distributed spectrum energy and 65.52% of the total average power of the signal.
The field programmable gate array (FPGA) implementation method of f(9, t) and the driving
circuit design of the voltage-controlled current source (VCCS) are introduced. Load experiments
were performed and the results show that the theoretical simulation voltage waveform and the
real experiment voltage waveform on the VCCS load are highly consistent, and the VCCS has fairly
high output impedance. This paper establishes an ideal multi-frequency synchronized signal
excitation current source and lays a foundation for the multi-frequency synchronous fast
measurement of BIS.
Number of references: 15
Main heading: Electric converters
Controlled terms: Electric impedance - Experiments - Field programmable gate arrays
(FPGA) - Synchronization - Walsh transforms
Uncontrolled terms: Bio-Impedance spectroscopies - Current sources - Driving circuit
designs - Excitation currents - Field-programmable gate array implementations - Multi
frequency - Theoretical simulation - Voltage-controlled
Classification code: 701.1 Electricity: Basic Concepts and Phenomena - 704.2 Electric
Equipment - 721.3 Computer Circuits - 901.3 Engineering Research - 921.3
Mathematical Transformations - 961 Systems Science
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
© 2013 Elsevier Inc. All rights reserved.
20130621 新增 11 条
1.
Accession number: 20132216387781
Title: Investigation on the correction of the Mie scattering lidar's overlapping factor and echo
signals over the total detection range
Authors: Di, Hui-Ge1 ; Hua, Deng-Xin1 ; Wang, Yu-Feng1 ; Yan, Qing1/狄慧鸽;华灯鑫;王玉峰;
闫庆
Author affiliation: 1 School of Mechanical and Precision Instrument Engineering, Xi'an
University of Technology, Xi'an 710048, China
Corresponding author: Di, H.-G. ([e-mail])