Wireless security system
First Claim
1. An alarm sensor comprising:
- a housing;
detecting means carried by said housing for detecting movement of said housing, wherein said detecting means comprises means for detecting changes in the position of said housing relative to the three-dimensional vector of a magnetic field; and
alarm means in electrical connection with said detecting means and carried by said housing for signaling when said detecting means detects movement of said housing.
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Accused Products
Abstract
The present invention is a wireless security system. Each alarm sensor contains three magnetoresistive sensors and that are capable of detecting the three-dimensional vector of a magnetic field. Preferably, the sensors detect the orientation of the door or window based upon the earth'"'"'s magnetic pole. The three-dimensional vector output of the magnetoresistive sensors is received by a microprocessor on-board the alarm sensor. The microprocessor continuously compares the magnetoresistive sensors output with the maximum allowable position of the door or window. If the magnetoresistive sensors output exceeds the maximum allowable position, the microprocessor will signal an alarm, which is transmitted to the network controller via a transmitter on-board the alarm sensor. If an intruder attempts to disable or override a sensor, the alarm sensor will transmit a tamper signal to the network controller.
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Citations
19 Claims
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1. An alarm sensor comprising:
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a housing;
detecting means carried by said housing for detecting movement of said housing, wherein said detecting means comprises means for detecting changes in the position of said housing relative to the three-dimensional vector of a magnetic field; and
alarm means in electrical connection with said detecting means and carried by said housing for signaling when said detecting means detects movement of said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An alarm sensor comprising:
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a housing;
detecting means carried by said housing for detecting changes in the position of said housing relative to the three-dimensional vector of the earth'"'"'s magnetic field; and
alarm means in electrical connection with said detecting means and carried by said housing for signaling when said detecting means detects movement of said housing. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A security system comprising:
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at least one alarm sensor having a housing, at least two magnetoresistive sensors carried by said housing, said at least two magnetoresistive sensors capable of detecting the three-dimensional vector of a magnetic field;
comparator means carried by said housing and in electrical connection with said at least two magnetoresistive sensors, said comparator means capable of determining changes in the detections of said at least two magnetoresistive sensors;
alarm means in electrical connection with said at least two magnetoresistive sensors and carried by said housing for signaling when said comparator means determines changes in the detections of said at least two magnetoresistive sensors; and
a network controller capable of receiving signals from each said alarm means of said at least one alarm sensor. - View Dependent Claims (17, 18, 19)
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Specification