Sensor system and a method of temperature-compensation thereof
AssigneeDana Automotive Systems Group, LLC
InventorJustin S. Davis
Life of this patent
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Abstract
A sensor system includes a first sensor, a second sensor, and a control in electrical communication with the first and second sensors. The controller includes a memory for storing data configured to store an offset profile for the at least one output of the first sensor. The offset profile includes a plurality of offset values, which is calculated using measured outputs of the first sensor determined while a position of a conductive material is maintained and a temperature of surrounding atmosphere is varied.
Claims14
A sensor system, comprising:
- a first sensor positioned radially outward from a sensor plate coupled to a lock ring of a differential of an axle assembly of a drive unit, the first sensor configured to generate at least one output, wherein the first sensor is an eddy current sensor, further comprising a second sensor positioned opposite the first sensor relative to the sensor plate, wherein the first sensor and the second sensor are positioned within the differential, and wherein the second sensor is a temperature sensor;
- and
- a controller in electrical communication with the first sensor, the controller comprising a memory for storing data configured to store at least one offset value for the at least one output of the first sensor based on a temperature sensed by the second sensor.
A method of temperature-compensation of a sensor system, comprising the steps of:
- providing a first sensor configured to generate an output, the first sensor positioned radially outward from a sensor plate coupled to a lock ring of a differential of an axle assembly of a drive unit of a vehicle, wherein the first sensor is an eddy current sensor, further comprising a second sensor positioned opposite the first sensor relative to the sensor plate, wherein the second sensor is a temperature sensor, and wherein the first sensor and the second sensor are positioned within the differential;
- providing a controller in electrical communication with the first sensor, wherein the controller comprises a memory for storing data;
- providing a plurality of offset values for the output of the first sensor;
- transmitting the output of the first sensor to the controller;
- and
- calculating a temperature-compensated output of the first sensor, based on an output of the second sensor, by adjusting the output of the first sensor by one of the offset values stored in the memory of the controller.
Dependencies are inferred from the claim text.