Device for supervising an area
First Claim
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1. A device for supervising a crossing (16) by detecting an object in a predetermined effective detection area of the crossing lying between railway gates of a railway and another way, the device comprising:
- a detector (18) including means for transmitting a detection signal beam and receiving beam reflections from the object;
reciprocating means for pivotally reciprocating the detector to transmit the detection signal beam over a pivot angle (v);
a signal processing unit (19) coupled to the detector, the signal processing unit including means for delimiting the effective detection area by determining an effective distance as a function of the pivot angle and considering only objects within the effective distance;
wherein;
the crossing area (16) is substantially rectangular; and
the angle (v) is bounded by a first direction (R1) extending substantially parallel to one of the railway gates, and a second direction (R2) extending substantially perpendicularly to the one of the railway gates.
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Abstract
A device for supervising an area (16), in particular the crossing area between railway gates, in order to detect objects occurring in the area comprises a detector (18) adapted to transmit detection signals and receive their reflection caused by objects. The detector (18) is pivotably arranged in a reciprocal manner so as to transmit the detection signals in an angular area. The detector (18) may be a laser, the light of which forms the detection signals.
13 Citations
8 Claims
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1. A device for supervising a crossing (16) by detecting an object in a predetermined effective detection area of the crossing lying between railway gates of a railway and another way, the device comprising:
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a detector (18) including means for transmitting a detection signal beam and receiving beam reflections from the object; reciprocating means for pivotally reciprocating the detector to transmit the detection signal beam over a pivot angle (v); a signal processing unit (19) coupled to the detector, the signal processing unit including means for delimiting the effective detection area by determining an effective distance as a function of the pivot angle and considering only objects within the effective distance;
wherein;the crossing area (16) is substantially rectangular; and the angle (v) is bounded by a first direction (R1) extending substantially parallel to one of the railway gates, and a second direction (R2) extending substantially perpendicularly to the one of the railway gates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification