High Accuracy Biological Impedance Measurement System Design and Calibration

Author

Diao, Jietao ; Zhou, Zhou ; Li, Nan ; Nie, Hongshan ; Yu, Hongqi ; Xu, Hui

Author_Institution

Sch. of Electr. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China

fYear

2012

fDate

July 31 2012-Aug. 2 2012

Firstpage

466

Lastpage

470

Abstract

The application of biological impedance measurement demands for high-accuracy and fast-speed. A novel measurement system for biological impedance measurement based on automatic balancing bridge is proposed. Besides the improvement on accuracy introduced by bridge method, the utilization of the Least Mean Square (LMS) method guarantees the measurement speed. We designed calibration method to eliminate the error inducted by the practical circuit. The test results reveal the in-phase and quadrature component measurement errors of the proposed system with calibration are respectively lower than 2 percent and 3.2 percent in the range of 1KHz to 1MHz. The system has advantages of high-accuracy and fast-speed which fit for biological impedance measurement applications.

Keywords

bioelectric phenomena; biomedical measurement; bridge circuits; calibration; electric impedance measurement; least mean squares methods; measurement errors; automatic balancing bridge method; biological impedance measurement system design; calibration method; frequency 1 kHz to 1 MHz; in-phase component measurement errors; least mean square method; measurement speed; practical circuit; quadrature component measurement errors; Biology; Biomedical measurements; Bridge circuits; Calibration; Impedance; Impedance measurement; Least squares approximation; automatic balancing bridge; biological impedance measurement; calibration;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Manufacturing and Automation (ICDMA), 2012 Third International Conference on

Conference_Location

GuiLin

Print_ISBN

978-1-4673-2217-1

Type

conf

DOI

10.1109/ICDMA.2012.112

Filename

6298557