Method and System for Guarding a Person in a Building
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Abstract
The movement of persons is indicated at least at two predefined locations in a building with motion detectors (108, 110) intended for monitoring each location and fastened to the building. By means of the detections, the movement of each person is detected from a predefined initial location (102) to a predefined destination location (104) in a predefined time without raising an alarm if the detected locations of the person form a line of predefined consecutive locations (116, 118). Otherwise, an alarm is raised.
19 Citations
24 Claims
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1-12. -12. (canceled)
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13. A method for guarding one or more persons inside a building, the method comprising directing, by means of at least two motion detectors fastened to the building, into a room being monitored at least two non-superimposed beams, at least one of which extends in a width of at most dozens of centimetres across the room being monitored;
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detecting the movement of each person at least at two locations defined by the beams; observing the movement of each person by means of the detections in a predefined time without raising an alarm, if the detected locations of the person form a line of predefined consecutive locations from a predefined initial location to a predefined destination location, and raising an alarm if this is not the case. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A system for guarding one or more persons inside a building, wherein the system comprising
at least two motion detectors and a control centre; -
each motion detector being fastened to the building and configured to direct into a room being monitored at least two non-superimposed beams in such a manner that at least one of the motion detectors is configured to extend its beam in a width of at most dozens of centimetres across the room being monitored; each motion detector being configured to indicate the movement of each person at least at two locations defined by the beams; and the control centre being configured to observe the movement of each person by means of the detections in a predefined time without raising an alarm, if the detected locations of the person form a line of predefined consecutive locations from a predefined initial location to a predefined destination location, and the control centre being configured to raise an alarm if this is not the case. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification