Method and apparatus for detection of motion with a gravitational field detector in a security system
First Claim
1. A method of generating an alarm signal upon detecting a change in position of an object comprising the steps of:
- a) locating a housing with respect to the object;
b) monitoring, with apparatus in the housing, the gravitational field of the earth;
c) detecting, with apparatus in the housing, a change in the position of the housing with respect to the gravitational field of the earth;
d) generating an alarm signal upon detecting a change in position of the housing with respect to the gravitational field of the earth that exceeds a first predetermined threshold; and
e) transmitting by wireless transmission the alarm signal to a remote receiving station.
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Accused Products
Abstract
In a first aspect, the present invention is a method, apparatus, and system for detecting a change in position of a door or a window in an alarm system with a singular housing having a magnetometer for monitoring the magnetic field of the earth, and a microprocessor for detecting a change in the position of the singular housing with respect to the magnetic field of the earth. The microprocessor generates an alarm signal upon detecting the change, and causes the alarm signal to be transmitted, by wireless transmission, to a remote receiving station. The device may also be used to determine if an object that it is affixed to has been moved, such as for a theft alarm for an object such as a painting. In a second aspect of the invention, a gravitational sensor is used to monitor the gravitational field of the earth and determine if an associated object or person has been moved with respect to the gravitational field, thus providing motion detection and signaling an alarm.
36 Citations
21 Claims
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1. A method of generating an alarm signal upon detecting a change in position of an object comprising the steps of:
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a) locating a housing with respect to the object;
b) monitoring, with apparatus in the housing, the gravitational field of the earth;
c) detecting, with apparatus in the housing, a change in the position of the housing with respect to the gravitational field of the earth;
d) generating an alarm signal upon detecting a change in position of the housing with respect to the gravitational field of the earth that exceeds a first predetermined threshold; and
e) transmitting by wireless transmission the alarm signal to a remote receiving station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for generating an alarm signal upon detecting a change in its position comprising:
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a) means for monitoring the gravitational field of the earth;
b) means for detecting a change in the position of the housing with respect to the gravitational field of the earth;
c) means for generating an alarm signal upon detecting a change in position of the housing with respect to the gravitational field of the earth that exceeds a first predetermined threshold; and
d) means for transmitting by wireless transmission the alarm signal to a remote receiving station. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A security system comprising:
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a) a single-housing motion sensing device comprising;
i. means for monitoring the gravitational field of the earth;
ii. means for detecting a change in the position of the housing with respect to the gravitational field of the earth;
iii. means for generating an alarm signal upon detecting a change in position of the housing with respect to the gravitational field of the earth that exceeds a first predetermined threshold; and
iv. means for transmitting by wireless transmission the alarm signal to a remote receiving station; and
b) a receiving station located remotely from the single-housing motion sensing device comprising;
i. means for receiving by wireless transmission the alarm signal, and ii. means for indicating an alarm condition in response to receipt of the receipt of the alarm signal. - View Dependent Claims (19, 20, 21)
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Specification