Wireless security sensor transmitter
First Claim
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1. Apparatus for sending message packets, comprising:
- a) an input processor for processing a signal from a sensor, the signal indicating a change detected by the sensors, wherein the input processor processes the signal within each of a first activation period and a second activation period, and wherein, after the first activation period, a current is applied to an input circuit of the input processor at a current level selected to alleviate a condition potentially causing unsatisfactory sensing of the signal, andb) a message packet generator, operably connected to the input processor, for generating a message packet for the processed sensor signal, the message packet including information derived from the sensor signal.
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Abstract
An apparatus and method for sending messages from a sensor to a system controller in a wireless security or monitoring system, including processing signals from the sensor and generating message packets which include information derived from the sensor signals.
110 Citations
34 Claims
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1. Apparatus for sending message packets, comprising:
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a) an input processor for processing a signal from a sensor, the signal indicating a change detected by the sensors, wherein the input processor processes the signal within each of a first activation period and a second activation period, and wherein, after the first activation period, a current is applied to an input circuit of the input processor at a current level selected to alleviate a condition potentially causing unsatisfactory sensing of the signal, and b) a message packet generator, operably connected to the input processor, for generating a message packet for the processed sensor signal, the message packet including information derived from the sensor signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. In a monitoring system having a system controller and a plurality of sensors, an apparatus associated with a sensor, the apparatus comprising:
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a filter for receiving signals from a sensor circuit associated with the sensor and passing signals that represent a condition detected by the sensor; a message processor, operably connected to the filter, for generating a message for each signal passed by the filter; and a filter monitor, operably coupled to the filter, for periodically activating the filter to receive the signals from the sensor in each of a first activation period and a second activation period, wherein, after the first activation period, a current is applied to an input circuit of the filter at a current level selected to alleviate a condition potentially causing unsatisfactory reception of the signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of processing a signal from a sensor to be sent to a system controller, comprising:
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receiving the signal via an input circuit coupled to the sensor; processing the signal during a first activation period and a second activation period; applying, after the first activation period, a current to the input circuit at a current level selected to alleviate a condition potentially causing unsatisfactory sensing of the signal; validating the signal if the signal indicates a substantially similar condition during the first and second activation periods; and generating a message for each validated signal. - View Dependent Claims (28, 29, 30, 31)
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32. A monitoring method comprising the steps of:
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monitoring a signal from a sensor circuit during each of a first period and a second period, the signal indicating a condition sensed by the sensor; applying a current to the sensor circuit after the first period, the current having a current level selected to alleviate a condition causing unsatisfactory sensing of the signal; generating a message when the signal from the sensor indicates a substantially similar condition during both of the first and second periods.
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33. A monitoring device comprising:
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an input processor for processing a signal received from a sensor via an input of the input processor, the signal indicating a condition sensed by the sensor; an input activator, operably coupled to the input processor, for periodically activating the input processor to process the signal from the sensor during each of a first activation period and a second activation period; a current circuit for applying, in the event the signal processed by the input processor in the first activation period indicates the condition, a current to the input of the input processor during the second activation period, wherein the current has a current level selected to alleviate a short circuit existing at the input; and a message generator for generating a message when the signal from the sensor indicates a substantially similar condition during at least two of the activation periods.
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34. A monitoring apparatus comprising:
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an input circuit for monitoring a condition indicated by a sensor during each of first activation period and a second activation period; a current circuit for applying, in the event the sensor indicates the condition, a current to the input circuit after during the first activation period, wherein the current has a current level selected to alleviate a short circuit existing in the input circuit; and a message generator, operably coupled to the input circuit, for generating a message when the sensor indicates a substantially similar condition during at least two of the monitoring periods.
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Specification