Magnetic sensor for determining the location of controlled magnetic leakages

摘要

The invention relates to a magnetic sensor for determining the location of a moving object ( 2 ) along an axis of displacement (T), the sensor including: an open magnetic circuit ( 3 ) that delimits at least one gap ( 8 ) and includes means ( 4 ) for creating a magnetic flux, at least one first measuring cell ( 11 ) fixedly mounted in the magnetic circuit ( 3 ) and capable of measuring the value of the magnetic flux, means for processing the output signal delivered by the measuring cell ( 11 ) in order to determine the linear location of the moving object along the displacement axis. According to the invention: the magnetic circuit ( 3 ) also includes at least one pole piece ( 5 ) associated with means for creating a magnetic flux, the measurement cell ( 11 ) is mounted near an extreme point of displacement so as to measure the magnetic flux delivered by the creating means ( 4 ) minus the magnetic leakage flux.