Patent ID: 8390461

Claim:
Device for counting and determining the direction of passage ( 500 ) of living beings ( 114 ), the device comprising: (a) a first pyroelectric cell ( 502 ) adapted to deliver an electrical signal of a first type representing the infrared radiation emitted by a living being ( 114 ) passing in front of said first cell ( 502 ); (b) a second pyroelectric cell ( 102 ) of the type comprising a first detection window ( 104 ) and a second detection window ( 106 ), and adapted to deliver an electrical signal of a second type representing the direction of passage of the living being ( 114 ) in front of said second pyroelectric cell ( 102 ), the first cell ( 502 ) and the second pyroelectric cell ( 102 ) being one above the other; and (c) a processing unit adapted to determine firstly the number of living beings passing in front of said device ( 500 ), by analyzing the electrical signal of the first type and, secondly, the direction of passage of the living beings ( 114 ) passing in front of said device ( 500 ) by analyzing the electrical signal of the first type and the electrical signal of the second type.