| 摘要 |
The invention finds application in the field of electric valve actuators. Particularly, the invention relates to a magnetic absolute angular position sensor for valves controlled by electric part-turn actuators, wherein the rotation alpha of the valve shaft ( 10 ) induces a change in the direction along which the lines of the magnetic field generated by a magnet ( 8 ) integral therewith, pass through a stationary circuit board ( 7 ), containing two Wheatstone bridges arranged at 45° to each other, and made of a magneto-resistive material. Hence, two 90° electric signals X and Y are generated, having the same amplitude, which allow to uniquely determine the angle of rotation alpha of the shaft ( 10 ).
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