Distributed verification, confirmation or delay time system and method
First Claim
Patent Images
1. A system comprising:
- a communication link;
a plurality of electrical units coupled to the link wherein at least some of the units each include an event sensor and event tracking circuitry coupled to the sensor, wherein in response to a sensed event, the circuitry at the respective unit establishes an event tracking process at the respective unit and transmits via the link a first status message indicative thereof and whereby an event indicating message signifying the occurrence of that event is sent by the respective unit only where one of, the event is sensed at the end of the tracking process; and
, the event was continuously sensed during the tracking process has occurred.
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Abstract
A multi-unit monitoring system includes a plurality of units coupled to a communication medium. The system can also incorporate a common control element coupled to the medium. The individual units include control circuitry which is capable of carrying out verification, confirmation, or entry/exit delay processing. While the control element can receive messages from the various units indicative of their status, the units themselves carry out the respective timing functions.
37 Citations
22 Claims
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1. A system comprising:
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a communication link;
a plurality of electrical units coupled to the link wherein at least some of the units each include an event sensor and event tracking circuitry coupled to the sensor, wherein in response to a sensed event, the circuitry at the respective unit establishes an event tracking process at the respective unit and transmits via the link a first status message indicative thereof and whereby an event indicating message signifying the occurrence of that event is sent by the respective unit only where one of, the event is sensed at the end of the tracking process; and
, the event was continuously sensed during the tracking process has occurred.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multi-unit system;
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a communications link;
a plurality of electrical units coupled to the link wherein selected of the units each include circuitry responsive to a sensed condition to initiate at least one time interval; and
control circuitry at each of the selected units, responsive to one of, the presence of the condition continuously during the interval, and, the presence of the condition at any time during a contiguous subsequent interval whereupon the control circuitry generates a respective indicator. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A peer-to-peer monitoring system comprising:
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a communications link;
a plurality of electrical units coupled to the link wherein members of a first group of the units each include a fire sensor and wherein the members of the first group are substantially identical and each includes executable instructions for initiating a first interval in response to a locally sensed fire condition and instructions for transmitting, via the link, an interval initiating status message to other electrical units wherein other members of the first group include executable instructions for receiving the status message and in response thereto, upon sensing a local fire condition, enter an alarm state and transmit an alarm state message via the link to other units whereby, any unit which had emitted an interval initiating status message in response to a received alarm state message, executes instructions to emit another alarm sate message via the link. - View Dependent Claims (17, 18, 19)
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20. A door access control comprising:
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a door unit having a door location sensor for a respective door wherein the door unit is coupled to a local control circuit;
a manually operable input unit coupled to the control circuit for entering one of an entry indicator and an exit indicator whereupon executable instructions in the control circuit temporarily enter an exit state, for a predetermined time interval, permitting an exit via the respective door without entering an alarm state in response to a received exit indicator with other instructions, in response to the sensor signaling an entry via the respective door, temporarily entering into an entry state for a predetermined time interval thereby providing a time interval for receipt of an entry indicator and not entering an alarm state wherein the control circuit exits the respective state, after the respective time interval. - View Dependent Claims (21, 22)
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Specification