System and method for antenna failure detection
First Claim
1. A system for detecting failure of an antenna, comprising:
- a first antenna;
a transmitter, operatively coupled to the first antenna, for transmitting a test signal via the first antenna;
a second antenna;
a receiver, operatively coupled to the second antenna, for receiving via the second antenna the test signal transmitted via the first antenna; and
a control circuit operatively coupled to the transmitter and the receiver, the control circuit causing the transmitter to transmit the test signal via the first antenna, comparing a parameter of the test signal received by the receiver via the second antenna to a threshold parameter, and generating a message indicative of antenna failure when the parameter of the test signal received by the receiver differs from the threshold parameter by a predetermined amount.
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Accused Products
Abstract
In a wireless security system, the system controller includes one or more antennas for reception of signals from remote sensor-transmitter units. To detect antenna failure, the system controller generates a test signal with a known parameter and transmits this test signal via a first antenna. The system controller then measures the parameter of the corresponding test signal received, if any, via a second antenna, and compares the parameter of the corresponding test signal received to a predetermined threshold parameter. When the parameter of the test signal received via the second antenna differs from the threshold by a predetermined amount, or predetermined margin for error, an antenna failure message is generated.
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Citations
50 Claims
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1. A system for detecting failure of an antenna, comprising:
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a first antenna; a transmitter, operatively coupled to the first antenna, for transmitting a test signal via the first antenna; a second antenna; a receiver, operatively coupled to the second antenna, for receiving via the second antenna the test signal transmitted via the first antenna; and a control circuit operatively coupled to the transmitter and the receiver, the control circuit causing the transmitter to transmit the test signal via the first antenna, comparing a parameter of the test signal received by the receiver via the second antenna to a threshold parameter, and generating a message indicative of antenna failure when the parameter of the test signal received by the receiver differs from the threshold parameter by a predetermined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for detecting failure of an antenna, comprising:
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means for controlling the transmission of a test signal via a first antenna; means for receiving via a second antenna the test signal transmitted via the first antenna; means for comparing a parameter of the test signal received via the second antenna to a threshold parameter; and means for generating a message indicative of antenna failure, wherein the apparatus generates the message indicative of antenna failure when the parameter of the test signal received differs from the threshold parameter by a predetermined amount. - View Dependent Claims (18, 19, 20, 21)
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22. An apparatus for detecting failure of an antenna, comprising:
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means for controlling the transmission of a test signal via a first antenna; means for receiving via a second antenna the test signal transmitted via the first antenna; means for comparing a parameter of the test signal received via the second antenna to a threshold parameter; means for generating a message indicative of antenna failure; and means for receiving an operating signal from a sensor-transmitter unit.
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23. An apparatus for detecting an alarm signal indicative of an alarm condition and reporting the alarm condition to a central station, comprising:
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a first antenna; a transmitter operatively coupled to the first antenna; a second antenna; a receiver operatively coupled to the second antenna, the receiver and the second antenna being oriented to receive the alarm signal indicative of an alarm condition; and a central processing unit operatively coupled to the transmitter and the receiver, the central processing unit processing the alarm signal and reporting the alarm condition to a central station, and the central processing unit causing the transmitter to transmit a test signal via the first antenna and reporting to the central station a condition indicating antenna failure when a parameter of a corresponding test signal received by the receiver differs from a threshold parameter by a predetermined amount. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of detecting failure of an antenna, comprising:
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transmitting a test signal via a first antenna; receiving the test signal via a second antenna; comparing a parameter of the test signal received via the second antenna to a threshold parameter; and generating a message indicative of antenna failure when the parameter of the test signal received differs from the threshold parameter by a predetermined amount. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. An apparatus for detecting alarm signals indicative of an alarm condition and reporting the alarm condition to a central station, comprising:
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a control panel; a first antenna mounted on the control panel; a transmitter operatively coupled to the first antenna; a second antenna mounted on the control panel; a receiver operatively coupled to the second antenna; and a control circuit mounted on the control panel for controlling the transmission of a test signal by the transmitter, detecting reception of the test signal by the receiver, comparing a parameter of the test signal received to a threshold parameter, and generating a message indicative of antenna failure when the parameter of the test signal received differs from the threshold parameter by a predetermined amount. - View Dependent Claims (47, 48, 49)
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50. A wireless security system comprising:
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a control panel; one or more security sensors that detect security events and transmit alarm signals to the control panel; a first antenna mounted on the control panel; a second antenna mounted on the control panel, at least one of the first and second antennas receiving the alarm signals from the security sensors; a transmitter coupled to the first antenna; a receiver coupled to the second antenna; and a control circuit mounted on the control panel, the control circuit causing transmission of a test signal by the transmitter, detecting reception of the test signal by the receiver, comparing a parameter of the test signal received to a threshold parameter, and generating a message indicative of antenna failure when the parameter of the received test signal differs from the threshold parameter by a predetermined amount.
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Specification