Detection system and method for determining an alarm condition therein
First Claim
1. A method for determining an alarm condition for a confined space, the method characterised by the steps of:
- detecting low frequency acoustic signals in the confined space by a secondary microphone sensor;
generating an alarm signal by the secondary microphone sensor in response to detected low frequency acoustic signals;
determining whether the alarm signal represents a false alarm condition; and
inhibiting a primary sensor in response to a determined false alarm condition.
1 Assignment
0 Petitions
Accused Products
Abstract
A method (300) for determining an alarm condition for a confined space comprises detecting motion or an intrusion (305) in the confined space by a secondary sensor and generating (310) an alarm signal by the secondary sensor in response to detected motion or an intrusion. The method further comprises the steps of determining (315) whether the alarm signal represents a false alarm condition; and inhibiting (325) a primary sensor in response to a determined false alarm condition. The provision of a secondary sensor is used to identify false alarms and inhibit operation of the primary sensor or alarm in response thereto.
-
Citations
19 Claims
-
1. A method for determining an alarm condition for a confined space, the method characterised by the steps of:
-
detecting low frequency acoustic signals in the confined space by a secondary microphone sensor;
generating an alarm signal by the secondary microphone sensor in response to detected low frequency acoustic signals;
determining whether the alarm signal represents a false alarm condition; and
inhibiting a primary sensor in response to a determined false alarm condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A detection system for determining an alarm condition within a confined space comprising a primary alarm sensor, the detection system characterised by:
-
a secondary alarm microphone sensor arranged to generate an alarm signal in response to detected low frequency acoustic signals in the confined space; and
a signal processor operably coupled to the primary alarm sensor and secondary alarm microphone sensor, and configured to determine whether the alarm signal represents a false alarm condition and inhibit operation of the primary alarm sensor in response to a determined false alarm condition. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification