Apparatus for counting the number of objects passing a given point
First Claim
1. An apparatus for counting the number of persons passing a given point comprising:
- at least one radiant energy emitter and at least one corresponding radiant energy receiver provided on a ceiling above said given point, said radiant energy receiver being provided at an angle to said radiant energy emitter and being arranged and configured together with said radiant energy emitter such that the radiant energy emitted by said radiant energy emitter only intersects an extension of a radiant energy reception path of said radiant energy receiver in an area of intersection having a low point located at a height corresponding to substantially the minimum height of a person to be counted whereby said radiant energy receiver receives radiant energy only while a person to be counted is passing through the area of intersection and said radiant energy emitted by said radiant energy emitter is reflect from a head or shoulders of said person to be counted;
means for generating a signal corresponding to the reception of said reflected radiant energy; and
a means coupled to said receiver for counting said signals.
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Accused Products
Abstract
An apparatus for counting the number of objects passing a given point which includes a radiant energy emitter provided above a given point, a radiant energy receiver provided above a given point and at an angle to the radiant energy emitter such that a radiant energy beam emitted by the radiant energy emitter intersects an extension of a radiant energy reception path of the radiant energy receiver in an area of intersection located below the emitter and receiver and over said given point and the area of intersection is provided at a height corresponding to the height of an object to be counted and a means coupled to the receiver for counting the number of objects which passes through the area of intersection.
38 Citations
3 Claims
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1. An apparatus for counting the number of persons passing a given point comprising:
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at least one radiant energy emitter and at least one corresponding radiant energy receiver provided on a ceiling above said given point, said radiant energy receiver being provided at an angle to said radiant energy emitter and being arranged and configured together with said radiant energy emitter such that the radiant energy emitted by said radiant energy emitter only intersects an extension of a radiant energy reception path of said radiant energy receiver in an area of intersection having a low point located at a height corresponding to substantially the minimum height of a person to be counted whereby said radiant energy receiver receives radiant energy only while a person to be counted is passing through the area of intersection and said radiant energy emitted by said radiant energy emitter is reflect from a head or shoulders of said person to be counted; means for generating a signal corresponding to the reception of said reflected radiant energy; and a means coupled to said receiver for counting said signals. - View Dependent Claims (2, 3)
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Specification