Method and device for counting the passage of persons, animals or various objects at a precise spot

摘要

The invention relates to a counting system in which each passage interrupts the beam of rays 9 emitted by an emitter 5 towards three receiving sensors 6, 7, 8. The half-pulses supplied by the sensors 6 and 7 and by the divider 13 are counted. In contrast, the counter 8 carries out down-counting. The terminals 14 (counting) and 17 (down-counting) are linked to the input of a counting system. Application: counting not only of entries but also of exits and evaluation of the algebraic total. <IMAGE>