Motion detection system
First Claim
1. A detection system comprising motion detectors, which each define a surveillance area, and which are arranged for responding to the movement of objects in the surveillance areas, which are at least partially separated from each other in space, by delivering respective detector signals, characterized in that said motion detectors are connected in such a manner that movement of the object through successive surveillance areas in one direction will result in the delivery of different first and second signals that together form a quadrature signal that corresponds to the motion of the object as it moves through the successive surveillance areas.
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Abstract
A detection system including motion detectors, which are built up and connected in such a manner that movement of an object through successive surveillance areas in one direction will result in the delivery of a first detector signal, which is different from a second detector signal, which will be delivered upon movement of said object through the surveillance areas in at least partially opposite direction. The trend of the detector signals furthermore includes a measure for the distance at which the object passes the detection system. When the structures for the motion detectors are provided on the substrate in a specific manner, it becomes possible to manufacture such motion detectors in a simple manner.
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Citations
20 Claims
- 1. A detection system comprising motion detectors, which each define a surveillance area, and which are arranged for responding to the movement of objects in the surveillance areas, which are at least partially separated from each other in space, by delivering respective detector signals, characterized in that said motion detectors are connected in such a manner that movement of the object through successive surveillance areas in one direction will result in the delivery of different first and second signals that together form a quadrature signal that corresponds to the motion of the object as it moves through the successive surveillance areas.
- 16. A method for generating detector signals upon movement of an object through areas to be monitored, wherein the movement of the object through the areas generates different first and second signals that together form a quadrature signal that corresponds to the motion of the object.
Specification