Low Power Sensor System
First Claim
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1. A method for controlling power consumption in a system that senses its surroundings comprising:
- a. Sensing a physical property of the surroundings, andb. Determining from the sensed physical property a duration of a sleep state.
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Abstract
A sensor for a vehicle that conserves power by alternately switching between a power on and a reduced power state. The circuit compares a most recent sensor measurement with an earlier measurement while in the power-on state and then switches to a reduced power state. A time delay generation function determines when the circuit switches out of the reduced power state depending on the result of the comparison. The duration of the reduced power state can be increased depending on the similarity of the most recent measurement to an earlier measurement.
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Citations
20 Claims
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1. A method for controlling power consumption in a system that senses its surroundings comprising:
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a. Sensing a physical property of the surroundings, and b. Determining from the sensed physical property a duration of a sleep state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for repeatedly sensing its environment and operating in a low power consumption mode, comprising:
- a sensor, a power supply, an antenna and a control module wherein the control module uses a characteristic of a signal from the sensor to determine a rate at which to sense the environment.
- View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for controlling an electronic device that senses the environment external to the device comprising at least the steps:
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a. Sensing a characteristic of the environment external to the device, b. Comparing a representation of the sensed characteristic with at least one stored representation of at least one earlier sensed characteristic of the environment, and c. Changing from a first mode of operation to a second mode of operation depending on the result of said comparison. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification