Method and apparatus for detecting a hazard detector signal in the presence of interference
First Claim
1. An apparatus for detecting when a hazardous condition is present inside a structure, comprising:
- a transducer for converting a first pattern warning signal received from a first hazard detector and a second pattern warning signal received from a second hazard detector into a composite electronic signal, each of the first and second pattern warning signals comprising an on-time period followed by an off-time period;
an analog-to-digital converter for converting the composite electronic signal into a digital signal;
a memory for storing processor-executable instructions and one or more thresholds;
a transmitter for transmitting an alarm signal; and
a processor coupled to the analog-to-digital converter, the memory and the transmitter for executing the processor-executable instructions that causes the apparatus to;
determine that the hazardous condition is present based on the first pattern warning signal and the second pattern warning signal; and
transmit an alarm signal to a receiver when the hazardous condition has been determined to be present, based on the on-time duration.
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Accused Products
Abstract
The present disclosure describes methods and apparatus for detecting a pattern warning signal from a hazard detector in the presence of a second pattern warning signal from a second hazard detector. In one embodiment, hazard detector monitoring device converts a pattern warning signal and a second pattern warning signal into a composite electronic signal, each of the first and second pattern warning signals comprising an on-time period followed by an off-time period. Next, the composite electronic signal is converted into a digital signal and then an on-time duration of the digital signal is determined as a time that the digital signal exceeded a first voltage threshold. Finally, an alarm signal is transmitted to a receiver when the pattern warning signal has been determined to be present, based on the on-time duration.
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Citations
18 Claims
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1. An apparatus for detecting when a hazardous condition is present inside a structure, comprising:
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a transducer for converting a first pattern warning signal received from a first hazard detector and a second pattern warning signal received from a second hazard detector into a composite electronic signal, each of the first and second pattern warning signals comprising an on-time period followed by an off-time period; an analog-to-digital converter for converting the composite electronic signal into a digital signal; a memory for storing processor-executable instructions and one or more thresholds; a transmitter for transmitting an alarm signal; and a processor coupled to the analog-to-digital converter, the memory and the transmitter for executing the processor-executable instructions that causes the apparatus to; determine that the hazardous condition is present based on the first pattern warning signal and the second pattern warning signal; and transmit an alarm signal to a receiver when the hazardous condition has been determined to be present, based on the on-time duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17, 18)
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10. A method for determining when a hazardous condition is present inside a structure, comprising:
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converting a first pattern warning signal received from a first hazard detector and a second pattern warning signal received from a second hazard detector into a composite electronic signal, each of the first and second pattern warning signals comprising an on-time period followed by an off-time period; determining that the hazardous condition is present based on the first pattern warning signal and the second pattern warning signal; and transmitting an alarm signal to a receiver when the hazardous condition has been determined to be present, based on the on-time duration. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification