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US 12,754,198 B2Granted
Sensor having low power movement detection
AssigneeAllegro MicroSystems, LLC
InventorHoward J. Haselhuhn, Jr.
Life of this patent
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Abstract
Methods and apparatus for speed sensor having a first detection module with a first sensing element. The first detection module is configured to detect movement of a target during a first mode of operation and a second detection module is configured to detect movement of the target during a low power mode of operation.
Claims18
A speed sensor for a vehicle, comprising:
- a first detection module having a first sensing element, wherein the first detection module is configured to detect speed of a wheel for a moving vehicle during a first mode of operation that is active when the vehicle is moving;
- and
- a second detection module having a second sensing element, wherein the second detection module is configured to detect movement of the target after a period of no movement during a low power mode of operation, wherein the target comprises a wheel, wherein the low power mode is operative when the vehicle is parked, wherein the second detection module is configured to generate a wake up signal for increasing brake pressure by the vehicle after movement of the wheel is detected.
A method, comprising:
- employing a first sensing element in a first detection module in a speed sensor to detect speed of a wheel for a moving vehicle during a first mode of operation that is active when the vehicle is moving;
- and
- employing a second sensing element in a second detection module to detect movement of the target after a period of no movement during a low power mode of operation, wherein the target comprises a wheel, wherein the low power mode is operative when the vehicle is parked, wherein the second detection module is configured to generate a wake up signal for increasing brake pressure by the vehicle after movement of the wheel is detected.
Dependencies are inferred from the claim text.