Sensor having multiple magnetic blocks of unevenly distributed magnetic fluxes in housing
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United States of America Patent
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Aug 30, 2016
Grant Date -
Jul 30, 2015
app pub date -
Jun 5, 2013
filing date -
Jul 28, 2012
priority date (Note) -
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Abstract
A sensor having multiple magnetic blocks of unevenly distributed magnetic fluxes in a housing includes, sequentially connected, a sensing element, a power-assisted model processor (21), a digital-to-analog converter (27), and an operational amplifier (28). The sensing element includes a rotating disk (1) and an annular-groove fixing disk (40) fitted therewith. Multiple permanent magnetic blocks (2) are fixedly arranged on the rotating disk (1) in a circular-annular distribution, and at least two of the permanent magnetic blocks (2) are different in magnetic fluxes. On a certain side of the rotating disk (1), the magnetic polarities of all of the permanent magnetic blocks (2) on the certain side of the rotating disk (1) are distributed in a pattern of pole N, pole S, pole N . . . ; a Hall element (3) on the fixing disk (40) is arranged at a position which is close to the permanent magnetic blocks (2).
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