Alarm sensor multiplexing
First Claim
Patent Images
1. A system for monitoring an area and sounding an alarm comprising:
- a) at least one sensor having at least one pulse generator generating at least one analog pulse having a characteristic responsive to the nature of a threat sensed by said sensor; and
b) said at least one sensor connected to a controller by a single wire and said controller sounding an alert upon receipt of said at least one pulse.
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Abstract
A system for monitoring an area and sounding an alarm comprising. The system employs one or more sensors positioned about the protected area. Each sensor has one or more pulse generators generating one or more pulses each with a preassigned pulsewidth. The sensors are connected to a controller by a single wire. The controller sounds an alarm upon receipt of one or more pulses and identifies the sensor actuating the alarm by the measured pulsewidth.
37 Citations
14 Claims
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1. A system for monitoring an area and sounding an alarm comprising:
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a) at least one sensor having at least one pulse generator generating at least one analog pulse having a characteristic responsive to the nature of a threat sensed by said sensor; and
b) said at least one sensor connected to a controller by a single wire and said controller sounding an alert upon receipt of said at least one pulse. - View Dependent Claims (2, 3)
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4. A method of multiplexing the output of at least one sensor over a single wire comprising the steps of:
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a) arranging at least one sensor about a protected area;
b) said at least one sensor sensing incoming threat to said protected area and generating at least one electrical signal responsive to said incoming threat;
c) each said sensor converting said electrical signal to a pulse having a preassigned pulsewidth; and
d) transmitting said pulses from said at least one sensor to the controller via a single wire. - View Dependent Claims (5, 6)
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7. A system for monitoring an area and sounding an alarm comprising:
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a) at least one sensor having at least one pulse generator generating at least one pulse with a corresponding preassigned pulsewidth responsive to a corresponding level of threat sensed by said sensor; and
b) said at least one sensor connected to a controller by a single wire and said controller sounding an alert dependent upon said preassigned pulsewidth upon receipt of said at least one pulse. - View Dependent Claims (8, 9, 10)
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11. A method of multiplexing the output of a plurality of sensors over a single wire comprising:
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a) arranging said plurality of sensors about a protected area;
b) each of said sensors capable of sensing incoming threat to said protected area and generating at least one electrical signal corresponding to said incoming threat from at least one of said corresponding sensors;
c) said at least one corresponding sensor converting said electrical signal to a pulse having a preassigned pulsewidth; and
d) transmitting said pulse from said at least one corresponding sensor to the controller via a single wire. - View Dependent Claims (12, 13, 14)
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Specification