Elevator shaftway intrusion device using optical imaging processing
First Claim
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1. A detection system for detecting attempted entry into the shaft of an elevator cab comprising:
- power supply means for supplying power to said system;
image acquisition means in electrical connection with said power supply means and being disposed in said shaft proximate said elevator cab for acquiring an image of a zone of detection in said shaft; and
image processing means responsive to said image acquisition means for comparing a first image of said zone of detection in an un-intruded state with a second image of said zone in an intruded state and providing a detection signal when an object enters said detection zone in said intruded state, said image processing means indicating said attempted entry.
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Abstract
There is provided an elevator shaftway intrusion detector which utilizes an image detector including a camera for generating a detection field within a zone of detection including the elevator shaft-side roof and floor and an image processing means for generating a detection signal upon an attempted entry. A power supply and switching network are employed for applying power from the power supply to the image detector and processor which are responsive to the detection signal for applying power from the power supply to a detection indicator such as a siren.
106 Citations
11 Claims
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1. A detection system for detecting attempted entry into the shaft of an elevator cab comprising:
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power supply means for supplying power to said system; image acquisition means in electrical connection with said power supply means and being disposed in said shaft proximate said elevator cab for acquiring an image of a zone of detection in said shaft; and image processing means responsive to said image acquisition means for comparing a first image of said zone of detection in an un-intruded state with a second image of said zone in an intruded state and providing a detection signal when an object enters said detection zone in said intruded state, said image processing means indicating said attempted entry. - View Dependent Claims (2, 3, 4)
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5. A detection system for detecting attempted entry into the shaft of an elevator cab comprising:
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an image acquirer disposed in said shaft proximately to said elevator cab for acquiring an image of a zone of detection in said shaft above the roof of said elevator cab; and an image processor responsive to said image for detecting the presence of an object within the zone of detection by comparing a first image of said zone in an un-intruded state with a second image of said zone in an intruded state and providing a detection signal when an object is detected to be present in said zone of detection, said image processor indicating said presence in said zone of detection. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A detection system for detecting attempted entry into the shaft of an elevator cab comprising:
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an image detector for detecting the presence of an object within a zone of detection above the roof of said elevator cab, said image detector disposed fixedly in the shaftway above said elevator cab and having a variable image adjustment for adjusting images detected by said detector such that the same image of the roof of said elevator cab is detected while the elevator cab ascends towards said detector or descends away from said detector; and an image processor responsive to said image detector for providing a detection signal when an object is detected to be present in said zone of detection, said image processor indicating said presence in said zone of detection.
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Specification