Self-adaptive sensor unit for determining pulse switching points
AssigneeMannesmann VDO AG
InventorWerner Wallrafen
Life of this patent
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Abstract
A magnetically sensitive sensor for counting pulses for measuring rotational speeds and angular positions of a rotating component via a pulse transmitter connected for rotating with the rotating component automatically adapts its switching points to the respective measurement location conditions. A logic unit initiates automatic adaptation of the switching points from an original state when an operating parameter first exceeds a limit value after the supply voltage of the sensor turned on. The original state is not preset or is coarsely preset. The configuration of the switching points is then stored in a non-volatile data memory specifically for the sensor.
Claims9
A sensor for measuring rotational speeds and angular positions of a rotating component, comprising:
- a pulse transmitter comprising a magnetically acting pulse wheel operatively arrangeable for rotation with the rotating component;
- a non-volatile data memory for storing switching points;
- a limit value memory storing a limit value;
- a magnetically sensitive detector for generating an output signal in response to the position of the pulse transmitter and counting pulses during rotation of said pulse transmitter, said magnetically sensitive detector using said output signal and the switching points to determine the occurrence of pulses;
- and
- a logic unit operatively connected to said magnetically sensitive detector for initiating automatic determination of the switching points to be used based on the output signal level when the non-volatile memory is in an original state in which the switching points are not present in the non-volatile memory and when an operating parameter of the output signal exceeds the limit value for the first time after a supply voltage for the sensor is turned on, wherein the determined switching points are stored in said non-volatile data memory for continued use.
Dependencies are inferred from the claim text.