2011
DOI: 10.1007/s11517-011-0811-6
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Estimation of stray coupling capacitances in biopotential measurements

Abstract: Biopotential measurements are very sensitive to electromagnetic interference (EMI) from power-lines. Interference conditions are mainly imposed by electric-field coupling, whose effects can be described by coupling capacitances. The main of them are the patient-to-ground and the patient-to-power-line capacitances, usually denoted as C(B) and C(P), respectively. A technique to estimate these elements and experimental data obtained in different environmental conditions are presented. It was found that C(B) range… Show more

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Cited by 21 publications
(20 citation statements)
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“…In a later work, body-to-ground capacitance was experimentally measured between 136 pF to 273 pF for sitting and standing positions touching different objects [52]. The highest value for body-to-ground capacitance was found to be 3932 pF when metallic object was being touched in the standing position [52]. This shows that body-to-ground capacitance is effected when body is touching grounded objects.…”
Section: Body-to-ground Capacitancementioning
confidence: 85%
See 2 more Smart Citations
“…In a later work, body-to-ground capacitance was experimentally measured between 136 pF to 273 pF for sitting and standing positions touching different objects [52]. The highest value for body-to-ground capacitance was found to be 3932 pF when metallic object was being touched in the standing position [52]. This shows that body-to-ground capacitance is effected when body is touching grounded objects.…”
Section: Body-to-ground Capacitancementioning
confidence: 85%
“…the value of body-to-ground capacitance was measured between 110 pF to 3.9 nF at different locations for different situations in [51]. In a later work, body-to-ground capacitance was experimentally measured between 136 pF to 273 pF for sitting and standing positions touching different objects [52]. The highest value for body-to-ground capacitance was found to be 3932 pF when metallic object was being touched in the standing position [52].…”
Section: Body-to-ground Capacitancementioning
confidence: 86%
See 1 more Smart Citation
“…It is also an intervening factor in the assessment of human body impedance for risk analysis in case of electric contacts [3] or electromagnetic radiation [4] and in electrostatic discharge studies [5], and has strong influence in power-line interference in biopotential measurements [6][7][8]. Finally, changes due to body capacitance are the sensing principle of capacitive tactile, proximity [9] and seat occupancy sensors [10].…”
Section: Introductionmentioning
confidence: 99%
“…Body capacitance to ground can be measured by using a grounded oscilloscope and a passive 10:1 voltage divider probe [6,7], or a variable resistor, an amplifier and a voltmeter with grounded reference terminal [8], that estimate the power line (50/60 Hz) current through the body. These methods, however, heavily depend on the strength of existing power line fields and on the resistance of the contact with the body, hence on contact pressure.…”
Section: Introductionmentioning
confidence: 99%