Measuring system for interference detection of rotary motion of water meter, has sensors interference detecting mechanism with evaluation circuit that controls phase mismatch of phase shifted sensor signals to detect interference

摘要

The system has a rotary permanent magnet and two magnetic field sensors moved parallel to a rotation axis of the magnet and arranged angle-shifted manner to the axis for detecting rotating movement of the magnet and for generating two phase shifted sensor signals. An interference detecting mechanism (12) has an evaluation circuit (14) that controls phase mismatch of the signals to detect a magnetic interference.