An apparatus 200b and method is disclosed for detecting sensor error, in a system measuring e.g. angle of rotation in, for example, a power steering system. Three channels comprising respective magnetic sensing elements 102a-c, for instance anisotropic magneto-resistance (AMR) sensors, oriented at different respective angles, are fed into a processor 210, which computes expected third channel data from the first and second channel data, detecting sensor error based at least partly on a comparison of expected with actual third channel data. The angle measurement may be computed using an arctan function and the channels may further comprise an amplifier A1-A3 and a sampling circuit S1-S3. Each sensing element of respective sensing channels may comprise a full bridge circuit. The orientation angle of the third sensing element relative to the first may be approximately half that of the second sensing element relative to the same.


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    Title :

    Detecting sensor error


    Contributors:

    Publication date :

    2016-11-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



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