A method for impedance measurements based on EEG acquisition system.
- Author:
Jilun YE
;
Lanlan WEI
;
Fan WANG
;
Yantao SONG
;
Xu ZHANG
- Publication Type:Journal Article
- MeSH:
Calibration;
Electric Impedance;
Electroencephalography
- From:Chinese Journal of Medical Instrumentation
2014;38(4):240-250
- CountryChina
- Language:Chinese
-
Abstract:
In the bioelectric measurement, the electrode impedance detection is an important index to the signal quality evaluation and sensor electrode contact condition. In this paper, a method of accurately measuring the electrode impedance based on EEG measurement system was put forward, the method is based on the constant current source excitation signals which are added to the human body, by monitoring the human voltage to measure the electrode impedance. And different reference resistor calibration calculation in different sections was used to reduce the effect of constant current source on the precision of measurement results to improve the measurement accuracy.
