TY - GEN
T1 - Estimators for inductive-coupling based batteryless wireless high-frequency sensing
AU - Sivaramakrishnan, S.
AU - Rajamani, R.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - This paper develops estimation algorithms for inductively coupled batteryless wireless sensors. In such sensors, the objective is to estimate the capacitance of the embedded sensor by the measuring the influence of the sensor on an inductively coupled interrogator. The primary challenge in capacitance-estimation is the need for an accurate knowledge of the mutual inductance between the sensor and interrogator, which, varies with the location and alignment of the interrogator. Existing estimation methods that overcome this challenge are too slow for high-frequency sensing applications like microphones. This paper develops solutions designed to address the above limitation. A nonlinear adaptive observer and a cascaded filter are developed and evaluated for high-frequency capacitance estimation. Results show that the cascaded filter can accurately estimate high frequency capacitance changes with varying mutual inductance.
AB - This paper develops estimation algorithms for inductively coupled batteryless wireless sensors. In such sensors, the objective is to estimate the capacitance of the embedded sensor by the measuring the influence of the sensor on an inductively coupled interrogator. The primary challenge in capacitance-estimation is the need for an accurate knowledge of the mutual inductance between the sensor and interrogator, which, varies with the location and alignment of the interrogator. Existing estimation methods that overcome this challenge are too slow for high-frequency sensing applications like microphones. This paper develops solutions designed to address the above limitation. A nonlinear adaptive observer and a cascaded filter are developed and evaluated for high-frequency capacitance estimation. Results show that the cascaded filter can accurately estimate high frequency capacitance changes with varying mutual inductance.
UR - http://www.scopus.com/inward/record.url?scp=46449114685&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=46449114685&partnerID=8YFLogxK
U2 - 10.1109/ACC.2007.4282811
DO - 10.1109/ACC.2007.4282811
M3 - Conference contribution
AN - SCOPUS:46449114685
SN - 1424409888
SN - 9781424409884
T3 - Proceedings of the American Control Conference
SP - 3642
EP - 3647
BT - Proceedings of the 2007 American Control Conference, ACC
T2 - 2007 American Control Conference, ACC
Y2 - 9 July 2007 through 13 July 2007
ER -