| 摘要 |
A sensor for the inverse rotation of an electronic water meter is provided to apply a water gauge needing to reliably detect flux by detecting the flux due to considering an amount of a fluid flowing during the inverse rotation. A sensor for the inverse rotation of an electronic water meter includes a magnetic material(10) and a magnetic sensor unit. The magnetic material is installed on a pipe line where a fluid flows to rotate according to the flowing of the fluid. The magnetic sensor unit senses the rotation of the magnetic material to detect flux by counting a rotation number of the magnetic material. The magnetic sensor unit has a pair of magnetic sensors(20A,20B). The pair of magnetic sensors have a predetermined phase difference(135 °) to exactly determine direct or inverse rotations by comparing a detecting waveform of the magnetic material according to a direction of an operating magnetic field. |
