AN AUTOMATIC COMPENSATION OF EXTERNAL DISTURBANCES

FOR A HIGH SENSITIVE MAGNETIC SENSOR

C. Fosalau, C. Zet

Proceedings of 17th Symposium IMEKO TC 4 - Measurement of Electrical Quantities

September 8 - 10, 2010, Kosice, Slovakia

The paper deals with an automatic method designed to compensate the external magnetic disturbances acting upon a high sensitive magnetic sensor mounted in an ac bridge configuration, whose influences upon the output voltage are comparable to those produced by the quantity to be measured. The method is particularly applied for sensors whose characteristic is non-linear and which cannot be compensated using the classical method of supplying the bridge with a constant current source.