TY - GEN
T1 - Noncontact human electrophysiological measurements using a new displacement current sensor
AU - Faggion, Lorenzo
AU - Mahdi, Abdulhussain E.
PY - 2011
Y1 - 2011
N2 - In this paper we describe a newly developed displacement current sensor for non-contact, non-invasive human electrophysiological measurements, well suited for applications requiring remote detection of human presence. The sensor is built around an improvised transimpedance amplifier circuit, which employs a resistive feedback T-network to eliminate the need for ultra high values resistors normally needed for this type of measurements. It provides an operational bandwidth of 0.5-250 Hz and a remarkable noise floor of 7.8 μV/√Hz at 1Hz down to 30 nV/√Hz at 1 kHz. The sensor is particularly suitable for non-contact measurement of human electrophysiological signals, such as the ECG. Reported results, all obtained in normal unshielded environment, demonstrate the sensor's capability in measuring human heart related electrophysiological signals at off-body distance up to 50 cm. Two different sensor configurations are presented; a single-ended signal measurement using one sensor, and a differential signal measurement using two sensors.
AB - In this paper we describe a newly developed displacement current sensor for non-contact, non-invasive human electrophysiological measurements, well suited for applications requiring remote detection of human presence. The sensor is built around an improvised transimpedance amplifier circuit, which employs a resistive feedback T-network to eliminate the need for ultra high values resistors normally needed for this type of measurements. It provides an operational bandwidth of 0.5-250 Hz and a remarkable noise floor of 7.8 μV/√Hz at 1Hz down to 30 nV/√Hz at 1 kHz. The sensor is particularly suitable for non-contact measurement of human electrophysiological signals, such as the ECG. Reported results, all obtained in normal unshielded environment, demonstrate the sensor's capability in measuring human heart related electrophysiological signals at off-body distance up to 50 cm. Two different sensor configurations are presented; a single-ended signal measurement using one sensor, and a differential signal measurement using two sensors.
UR - http://www.scopus.com/inward/record.url?scp=84856887311&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2011.6127145
DO - 10.1109/ICSENS.2011.6127145
M3 - Conference contribution
AN - SCOPUS:84856887311
SN - 9781424492886
T3 - Proceedings of IEEE Sensors
SP - 296
EP - 299
BT - IEEE Sensors 2011 Conference, SENSORS 2011
T2 - 10th IEEE SENSORS Conference 2011, SENSORS 2011
Y2 - 28 October 2011 through 31 October 2011
ER -