Open AccessAuto‐calibration of Hall effect sensors for home energy consumption monitoring
Author(s) -
Beaufort Samson G.,
Levasseur M.A.,
Gag F.,
Gag G.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.3886
Subject(s) - calibration , hall effect sensor , energy consumption , consumption (sociology) , remote sensing , hall effect , energy (signal processing) , environmental science , electrical engineering , computer science , engineering , geography , sociology , statistics , mathematics , electrical resistivity and conductivity , magnet , social science
A technique to improve the accuracy of an electrical energy consumption monitoring system is proposed. This system is based on a network of Hall effect wireless sensors attached to the wire at the output of every circuit breaker in the electrical distribution panel. The readings provided by the Hall effect sensors show significant gain errors due to their sensitivity to the distance between the sensor and the monitored wire. To mitigate these gain errors and increase the system accuracy, the addition of a single high‐precision current transformer sensor at the main electrical input is proposed, measuring the total current. This signal is used as the reference signal in a least‐mean square algorithm to compensate for the unknown gains of the Hall effect sensors. Experimental results using three prototype Hall effect sensors show that the proposed solution converges within 1.7 min, reducing the average current measurement error from 2.54 to 0.46 A rms .