| 摘要 |
An angular position sensing device suitable for use in a mobility vehicle, particularly as a speed control input device. First and second magnetic sensors are rotationally offset with respect to each other within a plane and orientated and connected such that their outputs are complementary and related to magnetic field direction. A magnetic field source is provided rotatable relative to the first and second sensors within the plane such as to vary the direction of a magnetic field applied to the first and second sensors. A sensing circuit monitors the outputs of the sensors and provides an output which may be used as a speed control input for an electric vehicle. The magnetic sensors are preferably giant magneto resistive magnetic sensors having a sine/cosine relationship.
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