SPEED SENSOR Russian patent published in 2018 - IPC G01P3/488 

FIELD: measuring equipment.

SUBSTANCE: invention relates to speed sensor which is immune to impact of disturbing external magnetic field. Subject of invention is that in speed sensor case where second Hall sensor containing second Hall detector is placed, is connected to the front side of the case and the second Hall sensor is connected to an electronic system, which processes the second analog output signal to the second digital signal, Upper and lower threshold values of the output voltages from second Hall detector upon excess of which second analog signal is converted to second digital signal, are self-adjusting with respect to upper and lower peaks of the analog signal, and the south pole of second basic magnet engages the second magnetic detector is aligned with the sensitive axis (A4) of the second Hall detector on the side of first Hall detector, located opposite to the front surface of the case.

EFFECT: technical result is increased accuracy of measuring gear wheel rotational speed.

3 cl, 8 dwg