Multi-sensor doubled row direction sensitive counting and switching device
First Claim
1. A direction sensitive counting and switching device, comprising:
- an optical system including a convex lens and a passive infrared detector composed of a plurality of sensor elements arranged in at least one double row of sensor elements and disposed on one side of said convex lens for detecting radiation transmitted along a beam path from persons or objects moving through a detection area of said detector located on the other side of said convex lens and producing output signals in response to the detected radiation;
a preamplifier coupled to said detector for producing amplified output signals from the output signals from said sensor elements; and
an evaluation circuit means coupled to said preamplifier for processing the amplified output signals of said sensor elements and, if the amplified output signals permit a conclusion as to directional movement of a person or object in the detection area of the detector, initiating one of a counting and switching process which contains information about direction of movement of the respective person or object in the detection area.
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Accused Products
Abstract
A direction sensitive counting and switching device has an optical system which includes a convex lens and a passive infrared detector composed of sensor elements arranged in at least one double row. The detector is disposed on one side of the convex lens for detecting radiation transmitted along a beam path from persons or objects moving through a detection area of the detector located on the other side of the convex lens and producing output signals in response to the detected radiation. A preamplifier is coupled to the detector for producing amplified output signals from the output signals. An evaluation circuit is coupled to the preamplifier for processing the amplified output signals of the sensor elements and, if the amplified output signals permit a conclusion as to directional movement of a person or object in the detection area of the detector, initiates a counting or a switching process which contains information about direction of movement of the respective person or object in the detection area.
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Citations
15 Claims
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1. A direction sensitive counting and switching device, comprising:
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an optical system including a convex lens and a passive infrared detector composed of a plurality of sensor elements arranged in at least one double row of sensor elements and disposed on one side of said convex lens for detecting radiation transmitted along a beam path from persons or objects moving through a detection area of said detector located on the other side of said convex lens and producing output signals in response to the detected radiation; a preamplifier coupled to said detector for producing amplified output signals from the output signals from said sensor elements; and an evaluation circuit means coupled to said preamplifier for processing the amplified output signals of said sensor elements and, if the amplified output signals permit a conclusion as to directional movement of a person or object in the detection area of the detector, initiating one of a counting and switching process which contains information about direction of movement of the respective person or object in the detection area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification