Auto-calibration of Hall effect sensors for home energy consumption monitoring

摘要: A technique to improve the accuracy of an electrical energy consumption monitoring system is proposed. This based on a network Hall effect wireless sensors attached wire at output every circuit breaker in distribution panel. The readings provided by show significant gain errors due their sensitivity distance between sensor and monitored wire. To mitigate these increase accuracy, addition single high-precision current transformer main input proposed, measuring total current. signal used as reference least-mean square algorithm compensate for unknown gains sensors. Experimental results using three prototype that proposed solution converges within 1.7 min, reducing average measurement error from 2.54 0.46 Arms.