Door/window sensor
First Claim
Patent Images
1. A system comprising:
- a three-dimensional (3D) microelectromechanical system (MEMS) magnetic sensor;
a programmable processor; and
executable control software stored on a non-transitory computer readable medium,wherein the 3D MEMS magnetic sensor measures magnetic flux magnitude parameters of a magnetic field along three axes,wherein the 3D MEMS magnetic sensor measures magnetic vector parameters of the magnetic field along three axes,wherein the programmable processor and the executable control software compare the magnetic flux magnitude parameters and the magnetic vector parameters to movement reference values to determine whether the magnetic flux magnitude parameters and the magnetic vector parameters indicate relative movement of a door or a window associated with the 3D MEMS magnetic sensor, andwherein the 3D MEMS magnetic sensor measures the movement reference values responsive to a powering on event.
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Abstract
Systems and methods for a door or window contact sensor are provided. Some systems can include a three-dimensional (3D) microelectromechanical system (MEMS) magnetic sensor, a programmable processor, and executable control software stored on a non-transitory computer readable medium, wherein the 3D MEMS magnetic sensor can measure magnetic parameters of a magnetic field along three axes, and wherein the programmable processor and the executable control software can compare the magnetic parameters to reference values to determine whether the magnetic parameters indicate that a door or a window associated with the 3D MEMS magnetic sensor is open or closed.
16 Citations
19 Claims
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1. A system comprising:
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a three-dimensional (3D) microelectromechanical system (MEMS) magnetic sensor; a programmable processor; and executable control software stored on a non-transitory computer readable medium, wherein the 3D MEMS magnetic sensor measures magnetic flux magnitude parameters of a magnetic field along three axes, wherein the 3D MEMS magnetic sensor measures magnetic vector parameters of the magnetic field along three axes, wherein the programmable processor and the executable control software compare the magnetic flux magnitude parameters and the magnetic vector parameters to movement reference values to determine whether the magnetic flux magnitude parameters and the magnetic vector parameters indicate relative movement of a door or a window associated with the 3D MEMS magnetic sensor, and wherein the 3D MEMS magnetic sensor measures the movement reference values responsive to a powering on event. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a three-dimensional (3D) microelectromechanical system (MEMS) magnetic sensor; a programmable processor; and executable control software stored on a non-transitory computer readable medium, wherein the 3D MEMS magnetic sensor measures magnetic flux magnitude parameters of a magnetic field along three axes, wherein the 3D MEMS magnetic sensor measures magnetic vector parameters of the magnetic field along three axes, wherein the programmable processor and the executable control software compare the magnetic flux magnitude parameters to movement reference values and the magnetic vector parameters to determine whether the magnetic flux magnitudes indicate an attempt to defeat, and wherein the 3D MEMS magnetic sensor measures the movement reference values responsive to a powering on event. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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measuring movement reference values of a magnetic field along three axes at a three-dimensional (3D) microelectromechanical (MEMS) magnetic sensor responsive to a powering on event; after measuring the magnetic reference values, measuring magnetic flux magnitude parameters of the magnetic field along the three axes at the 3D MEMS magnetic sensor; after measuring the magnetic reference values, measuring magnetic vector parameters of the magnetic field along the three axes at the 3D MEMS magnetic sensor; and comparing the magnetic flux magnitude parameters and the magnetic vector parameters to the movement reference values to determine whether the magnetic flux magnitude parameters and the magnetic vector parameters indicate relative movement of a door or a window associated with the 3D MEMS magnetic sensor. - View Dependent Claims (16, 17, 18, 19)
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Specification