Title :
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
fDate :
July 31 2012-Aug. 2 2012
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;
Conference_Titel :
Digital Manufacturing and Automation (ICDMA), 2012 Third International Conference on
Conference_Location :
GuiLin
Print_ISBN :
978-1-4673-2217-1
DOI :
10.1109/ICDMA.2012.112
