Boundary crossing object detection system
First Claim
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1. A boundary monitoring apparatus comprising:
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object;
means for defining a boundary in said detection region;
means for determining a path of said object in the detection region;
means for performing an evaluation to determine if said path intersects with said boundary; and
means for raising an alarm depending on the evaluation,wherein said means for performing an evaluation is arranged to determine a minimum distance within said boundary of said path of said object from said radar device or other reference location, and wherein said means for raising an alarm raises an alarm if said path of the object is determined to intersect said boundary and if said minimum distance of said path is less than a threshold value, and does not raise said alarm if said path of the object is determined to intersect said boundary and if said minimum distance of the path is greater than said threshold value.
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Abstract
An boundary monitoring apparatus comprising an object detection device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object; means for defining a boundary in said detection region; means for determining a path of said object in the detection region; means for performing an evaluation of the determined path of the object with respect to the boundary; and means for causing an alarm event depending on the evaluation.
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Citations
20 Claims
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1. A boundary monitoring apparatus comprising:
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object;
means for defining a boundary in said detection region;
means for determining a path of said object in the detection region;
means for performing an evaluation to determine if said path intersects with said boundary; and
means for raising an alarm depending on the evaluation,wherein said means for performing an evaluation is arranged to determine a minimum distance within said boundary of said path of said object from said radar device or other reference location, and wherein said means for raising an alarm raises an alarm if said path of the object is determined to intersect said boundary and if said minimum distance of said path is less than a threshold value, and does not raise said alarm if said path of the object is determined to intersect said boundary and if said minimum distance of the path is greater than said threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object;
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15. A method of monitoring a boundary in an apparatus comprising a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object, the method comprising defining a boundary in said detection region;
- determining a path of said object in the detection region;
performing an evaluation to determine if said path intersects with said boundary;
determining a minimum distance within said boundary of said path of said object from said radar device or other reference location; and
raising an alarm if said path of the object is determined to intersect said boundary and if said minimum distance of the path is less than a threshold value, and not raising said alarm if said path of the object is determined to intersect said boundary and if said minimum distance of the path is greater than said threshold value.
- determining a path of said object in the detection region;
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16. A boundary monitoring apparatus comprising:
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object;
means for defining a boundary in said detection region;
means for determining a linear path of said object in the detection region;
means for performing an evaluation of the determined path to determine if the path intersects with said boundary of the object; and
means for raising an alarm depending on the evaluation,wherein said means for performing an evaluation is arranged to determine an angle of inclination of said linear path of said object from a reference axis, and wherein said means for raising an alarm raises an alarm if said path of the object is determined to intersect said boundary and if said determined angle meets an angle threshold requirement, and does not raise said alarm if the path of the object is determined to intersect said boundary and if said determined angle does not satisfy said angle threshold requirement. - View Dependent Claims (17, 18, 19)
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object;
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20. A method of monitoring a boundary in an apparatus comprising:
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object, the method comprising defining a boundary in said detection region;
determining a linear path of said object in the detection region;
performing an evaluation to determine if said path intersects with said boundary;
determining an angle of inclination of the determined linear path of said object from a reference axis;
raising an alarm if said path of the object is determined to intersect said boundary and if said determined angle meets an angle threshold requirement; and
not raising said alarm if the path of the object is determined to intersect said boundary and if said determined angle does not satisfy said angle threshold requirement.
- a radar device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a reflected signal from said object, the method comprising defining a boundary in said detection region;
Specification