SYSTEMS AND METHODS FOR HANDLING TRIGGER EVENTS
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Abstract
Systems and methods for using multi-criteria state machines to manage alarming states and pre-alarming states of a hazard detection system are described herein. The multi-criteria state machines can include one or more sensor state machines that can control the alarming states and one or more system state machines that can control the pre-alarming states. Each state machine can transition among any one of its states based on sensor data values, hush events, and transition conditions. The transition conditions can define how a state machine transitions from one state to another. The hazard detection system can use a dual processor arrangement to execute the multi-criteria state machines according to various embodiments. The dual processor arrangement can enable the hazard detection system to manage the alarming and pre-alarming states in a manner that promotes minimal power usage while simultaneously promoting reliability in hazard detection and alarming functionality.
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Citations
88 Claims
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1-55. -55. (canceled)
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56. A hazard detection system, comprising:
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a system processor; a plurality of sensors comprising a smoke sensor, a carbon monoxide sensor, and a heat sensor; and a safety processor operative to; access a trigger band of at least one of the sensors; monitor the sensors for trigger events, wherein a trigger event occurs when a data value associated with a monitored sensor moves out of the trigger band associated with that monitored sensor; and issue a signal to the system processor in response to each monitored trigger event; and wherein the system processor, responsive to the issued signal, is operative to; evaluate an operational state of the hazard detection system; and selectively adjust at least one boundary of at least one trigger band based on the operational state. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76)
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77. A method for managing a hazard detection system comprising a plurality of sensors, a system processor, and a safety processor, wherein the system processor is characterized as operating in a sleep state and a non-sleep state, the method comprising:
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while the system processor is in the sleep state; monitoring the safety processor for a wake event signal, the wake event signal comprising a trigger event signal that is transmitted by the safety processor to the system processor when a data value associated with a sensor moves out of a trigger band associated with that sensor; and transitioning the system processor from the sleep state to the non-sleep state in response to a monitored wake event signal; and while the system processor is in the non-sleep state; evaluating an operational state of the hazard detection system; selectively adjusting a boundary of at least one trigger band based on the evaluation of the operational state; transmitting the selective boundary adjustment to the safety processor to update at least one boundary of the at least one trigger band; and transitioning the system processor from the non-sleep state to the sleep state after system processor operations are complete. - View Dependent Claims (78, 79, 80, 81, 82, 83, 84, 85, 86, 87)
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88-119. -119. (canceled)
Specification