Low power absolute position sensor and method
First Claim
1. A low power absolute position sensor comprising:
- a sensing device for sensing position;
a power input for inputting power to the sensing device;
an output for supplying an output signal indicative of the sensed position; and
a controller receiving the output signal and controlling power supplied to the power input, said controller determining when the output signal does not change by a predetermined amount and controlling the power input to reduce power when the output signal does not change by the predetermined amount, wherein said controller further reapplies continuous full power to the power input when the output signal changes by the predetermined amount.
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Accused Products
Abstract
An absolute position sensor having a low power mode includes a sensing device for sensing position of an object such as a power door, a power input for inputting power to the sensing device, and an output for supplying an output signal indicative of the sensed position. The sensor also includes a controller that receives the output signal and controls power supplied to the power input. The controller determines when the output signal does not change by a predetermined amount and controls the power input to reduce power when the output signal does not change by the predetermined amount. The controller further reapplies continuous full power to the power input when the output signal changes by the predetermined amount.
26 Citations
12 Claims
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1. A low power absolute position sensor comprising:
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a sensing device for sensing position; a power input for inputting power to the sensing device; an output for supplying an output signal indicative of the sensed position; and a controller receiving the output signal and controlling power supplied to the power input, said controller determining when the output signal does not change by a predetermined amount and controlling the power input to reduce power when the output signal does not change by the predetermined amount, wherein said controller further reapplies continuous full power to the power input when the output signal changes by the predetermined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of sensing an absolute position with an absolute position sensor, said method comprising the steps of:
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sensing position of an object with a position sensing device; generating an output signal indicative of the sensed position; monitoring the sensed output signal to detect a change in the position signal exceeding a predetermined amount; reducing power input to the position sensing device when the sensed output does not change by a predetermined amount during a predetermined time period; and reapplying continuous full power input to the sensing device when the output signal changes by a predetermined amount. - View Dependent Claims (9, 10, 11, 12)
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Specification