WO1997022089A1 - Device for detecting the presence and direction of passage of mobiles and persons with the view to counting them - Google Patents

Device for detecting the presence and direction of passage of mobiles and persons with the view to counting them Download PDF

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Publication number
WO1997022089A1
WO1997022089A1 PCT/FR1995/001473 FR9501473W WO9722089A1 WO 1997022089 A1 WO1997022089 A1 WO 1997022089A1 FR 9501473 W FR9501473 W FR 9501473W WO 9722089 A1 WO9722089 A1 WO 9722089A1
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WO
WIPO (PCT)
Prior art keywords
reception
distance
optics
counting
transmission
Prior art date
Application number
PCT/FR1995/001473
Other languages
French (fr)
Inventor
Michel Leblanc
Original Assignee
Brime S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR9406962A priority Critical patent/FR2721126A1/en
Application filed by Brime S.A. filed Critical Brime S.A.
Priority to PT95942739T priority patent/PT867018E/en
Priority to ES95942739T priority patent/ES2173212T3/en
Priority to PCT/FR1995/001473 priority patent/WO1997022089A1/en
Priority to DE69525981T priority patent/DE69525981T2/en
Priority to EP95942739A priority patent/EP0867018B1/en
Publication of WO1997022089A1 publication Critical patent/WO1997022089A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M11/00—Counting of objects distributed at random, e.g. on a surface
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
    • G06M1/101—Design features of general application for actuating the drive by electric or magnetic means by electro-optical means
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit

Definitions

  • the present invention relates to a device making it possible to detect the presence and to determine the direction of passage of mobiles for the purpose of counting.
  • the term “mobile” applies as much to an object as to a living being.
  • the detection and the determination of the direction of passage of mobiles are usually done using a mechanical infrastructure of the turnstiles or gates type, or optical systems with beam cutting.
  • the turnstiles generally have three branches A person crossing the turnstile does turn it a third of a turn This rotation constitutes detection, and an external system can count the number of people who have passed
  • This device requires a large and costly ground infrastructure II causes a slowdown in the flow of pedestrians having to pass the turnstile, by a bottleneck effect, and can only operate in a single direction of passage
  • Another known device implements an infrared bamer, consisting of a emitting part and a receiving part facing each other and thus forming a line immaterial A pedestrian crossing this line is detected by the non reception of the light beam coming from the director An external system can thus count the number of people crossing the barrier
  • Infrared barriers need to be placed at a distance from the ground compatible with the size of the mobiles to be detected
  • detecting people requires placing the barrier at a about a meter in height, which requires
  • the device according to the invention is fixed to the vertical of the mobiles to be detected (ceiling for example), which does not require any infrastructure on the ground and puts it more to the ab ⁇ of possible acts of vandalism In addition, it comes under in the form of a monobloc, thus not requiring two separate elements, unlike the infrared barrier This arrangement does not generate a slowdown in the flow of the mobile flow
  • the device according to a first characteristic, comprises a housing comprising a first share two transmitters (1 and 4) each having the function of emitting a beam towards a mobile by means of optical means, on the other hand a reception system made up of two elements (2 and 3) capturing the beam reflected by the mobile passing through the detection zone by means of a reception optic, and thirdly an electronic control of the emission elements (1 and 4) and of processing of the signals received by the reception elements (2 and 3).
  • the first and second transmitters (1 and 4), as well as the reception elements, are infrared diodes.
  • the electronics for controlling each transmission element and for processing the signals received by each reception element comprises a clock (17). pulse generator driving each transmission element, an amplifier (18) amplifying the light signals generated by each reception element, and a blocking sampler (19) synchronized with said clock making it possible to block the amplified signals and to compare them at a reference voltage by means of a comparator (20)
  • the layout of the transmission and reception systems complies with the following relationships
  • the device incorporates two synchronized infrared transmitters and two receivers making it possible to generate two detection zones in space in the direction of movement of the mobiles.
  • the existence of these two virtual detection zones makes it possible to determine the direction of passage of the mobiles by direct reflection
  • the transmitting elements continuously emit light pulses At rest, when no mobile is present, the receivers receive no signal When a mobile passes through the detection zone of the sensor, this zone being between a minimum distance and a maximum distance, it meets a first beam This beam is reflected on the mobile and is detected by the first receiver By continuing its movement, the mobile then cuts the second beam The second beam is reflected on the mobile and is detected by the second receiver.
  • the chronology of the light beams received makes it possible to determine the direction of passage of the mobile
  • this figure represents the minimum distances and maximum detection distances
  • this figure represents the block diagram of the electronics used for the device
  • the device comprises two emitters of the infrared diode type (1 and 4)
  • the light emitted by these infrared emitters is focused using an optical emitting device (5 and 7)
  • a mobile cutting the beam emitted by the first infrared transmitter (1) reflects this beam
  • the reflected beam (10) passes through the reception optics (6) to reach the first reception element (3)
  • a signal is then received by the first receiving element (3)
  • the mobile continuing its movement cuts the beam emitted by the second infrared emitter (4), and reflects this beam
  • the reflected beam (1 1) passes through the reception optics (6) to reach the second reception element (2)
  • a signal is then received by the second receiving element (2)
  • the signals received on the reception elements (2 and 3) make it possible to know the presence and the direction of passage of the mobile If the first reception element (3) receives a signal before the second reception element (2), the mobile moves in a direction from the first transmitting element (1) to the second transmitting element (4) If the second receiving element (2) receives a signal before the first receiving element (3), the mobile moves in a direction from the second transmitting element (4) to the first transmitting element (1)
  • the device according to the invention allows the detection of mobiles cutting the beam emitted by the first transmitter (1) over a zone comp ⁇ se between a minimum distance (12) and a maximum distance (14). It allows the detection of mobiles cutting the beam emitted by the second infrared emitter (4) over a zone comp ⁇ se between a minimum distance (13) and a maximum distance (15).
  • the maximum (14) and minimum (12) distances are determined by the focal length (16) of the reception optics (6), the size of the sensitive surface of the first reception element (3), the distance (9) between the first reception element (3) and the axis of the reception optics (6), the distance between the transmission optics (5) and the reception optics (6)
  • the maximum distances (15 ) and minimum (13) are determined by the focal length (16) of the reception optics (6), the size of the sensitive surface of the first reception element (2), the distance (8) between the second reception element (2) and the axis of the reception optics (6), the distance between the transmission optics (7) and the reception optics (6)
  • the transmission elements (1 and 4) are controlled by pulses supplied by a clock (17).
  • the pulsed light signals received by the reception elements (2 and 3) are amplified by means of an amplifier (18). After amplification, the received signals are blocked synchronously with the transmission clock by means of a blocking sampler (19), so that they can be compared with a reference voltage in a comparator (20). The result of this comparison gives the output signal 1 and the output signal 2.
  • FIG. 4 represents the timing diagrams of the output signals (output 1 and output 2) for a mobile passing in the direction first transmission element (1) towards second transmission element (2).
  • Niche-shaped signals appear when the receiving elements no longer receive a signal.
  • FIG. 5 represents the timing diagrams of the output signals (output 1 and output 2) for a mobile passing in the direction from the second transmission element (2) to the first transmission element (1).
  • Niche-shaped signals appear when the receiving elements no longer receive a signal.
  • the device can be provided with 2 reception optics, each being associated with a reception element (2 and 3)
  • the main industrial applications of the device are in particular the detection and determination of the direction of passage of mobiles moving alone or in groups and in various places for counting. For example, it is the counting of people entering and leaving a means of transport for people (metro, bus, train ...) or a public or private place, counting in particular of objects passing on a carpet driving, counting vehicles ...
  • Several devices according to the invention can be combined to detect and determine the direction of passage of mobiles moving head-on, for the purpose of counting (in the case of people moving in a metro corridor for example).
  • the number of devices to be used depends on the size, shape and type of mobile to be detected.
  • the devices used as described above must be synchronized so that there is no optical interference.
  • the arrangement of the devices described above allows further processing of the information supplied at the output of the devices.
  • the treatments can be as follows:
  • redundancy the signals supplied by neighboring devices can be compared to obtain reliable information.
  • the signals provided by the devices can be analyzed to detect the presence and determine the direction of passage of mobiles moving along an ill-defined axis (case of pedestrians in a metro corridor for example)

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Control Of Conveyors (AREA)

Abstract

The device of the invention provides for the detection of the presence and the direction of passage of mobiles, with a view to their counting, without requiring ground infrastructure. The device comprises two emitters of the infrared diode type (1 and 4). A mobile cutting the beam emitted by the first infrared emitter (1) reflects said beam. A signal is then received by the first reception element (3). The mobile continuing its displacement cuts the beam emitted by the second infrared emitter (4). A signal is then received by the second receiver element (2). The chronology of the signals received by the receiver elements enables to determine the direction of passage of the mobiles. An electronic embodiment provides for the control of emission elements (1 and 4) and the processing of the signals received by the receiver elements (2 and 3), with a view to counting the mobiles. The device of the invention is particularly intended to the counting of persons coming in and going out of transport means (underground, train, bus) or in a public or private place, to the counting of objects conveyed on a conveyor belt, as well as to the counting of vehicles.

Description

DISPOSITIF DE DETECTION DE PRESENCE ET DE SENS DE PASSAGE DE MOBELES ET DE PERSONNES EN VUE DU COMPTAGEDEVICE FOR DETECTING THE PRESENCE AND DIRECTION OF PASSING OF MOBELS AND PEOPLE FOR COUNTING
La présente invention concerne un dispositif permettant de détecter la présence et de déterminer le sens de passage de mobiles en vue du comptage Le terme de « mobile » s'applique autant a un objet qu'à un être vivantThe present invention relates to a device making it possible to detect the presence and to determine the direction of passage of mobiles for the purpose of counting. The term “mobile” applies as much to an object as to a living being.
La détection et la détermination du sens de passage de mobiles sont habituellement faites a l'aide d'une infrastructure mécanique de type tourniquets ou portillons, ou de systèmes optiques a coupure de faisceaux Les tourniquets disposent généralement de trois branches Une personne franchissant le tourniquet fait tourner celui-ci d'un tiers de tour Cette rotation constitue la détection, et un système externe peut comptabiliser ie nombre de personnes qui sont passées Ce dispositif nécessite une infrastructure au sol importante et coûteuse II provoque un ralentissement du flux de piétons devant passer le tourniquet, par un effet de goulot, et ne peut fonctionner que dans un seul sens de passage Un autre dispositif connu met en oeuvre une bamère infrarouge, constituée d'une partie emettπce et d'une partie receptπce mises en regard et formant ainsi une ligne immatérielle Un piéton coupant cette ligne est détecte par la non réception du faisceau lumineux provenant de l'émetteur Un système externe peut ainsi compter le nombre de personnes ayant franchi la barrière Les barrières infrarouges nécessitent d'être placées à une distance du sol compatible avec la taille des mobiles à détecter Ainsi, la détection de personnes nécessite de placer !a barrière a un mètre de hauteur environ, ce qui nécessite une infrastructure de soutien Cette disposition du capteur a un mètre du sol ne le met pas à l'abri des actes de vandahsmeThe detection and the determination of the direction of passage of mobiles are usually done using a mechanical infrastructure of the turnstiles or gates type, or optical systems with beam cutting. The turnstiles generally have three branches A person crossing the turnstile does turn it a third of a turn This rotation constitutes detection, and an external system can count the number of people who have passed This device requires a large and costly ground infrastructure II causes a slowdown in the flow of pedestrians having to pass the turnstile, by a bottleneck effect, and can only operate in a single direction of passage Another known device implements an infrared bamer, consisting of a emitting part and a receiving part facing each other and thus forming a line immaterial A pedestrian crossing this line is detected by the non reception of the light beam coming from the director An external system can thus count the number of people crossing the barrier Infrared barriers need to be placed at a distance from the ground compatible with the size of the mobiles to be detected Thus, detecting people requires placing the barrier at a about a meter in height, which requires a supporting infrastructure This arrangement of the sensor is a meter from the ground does not protect it from acts of vandahsme
Le dispositif selon l'invention se fixe a la verticale des mobiles a détecter (plafond par exemple), ce qui ne nécessite aucune infrastructure au sol et le met plus a l'abπ d'éventuels actes de vandalisme De plus, il se présente sous forme d'un monobloc, ne nécessitant ainsi pas deux éléments séparés, contrairement à la barrière infrarouge Cette disposition ne génère pas de ralentissement dans l'écoulement du flux des mobiles Le dispositif, selon une première caractéristique, comporte un boîtier comprenant d'une première part deux émetteurs (1 et 4) ayant pour fonction d'emettie chacun un faisceau en direction d'un mobile par l'intermédiaire de moyens optiques, d'une seconde part un système de réception constitué de deux éléments (2 et 3) captant le faisceau réfléchi par le mobile passant dans la zone de détection par l'intermédiaire d'une optique de récepuon, et d'une troisième part une électronique de pilotage des éléments d'émission (1 et 4) et de traitement des signaux reçus par les éléments de réception (2 et 3). Les premier et second émetteurs (1 et 4), ainsi que les éléments de réception, sont des diodes infrarouges L'électronique de pilotage de chaque élément d'émission et de traitement des signaux reçus par chaque élément de réception comporte une horloge (17) generatnee d'impulsion pilotant chaque élément d'émission, un amplificateur (18) amplifiant les signaux lumineux générés par chaque élément de réception, et un échantillonneur bloqueur (19) synchronisé avec ladite horloge permettant de bloquer les signaux amplifiés et de comparer ceux-ci à une tension de référence au moyen d'un comparateur (20) La disposition des systèmes d'émission et de réception est conforme aux relations suivantesThe device according to the invention is fixed to the vertical of the mobiles to be detected (ceiling for example), which does not require any infrastructure on the ground and puts it more to the abπ of possible acts of vandalism In addition, it comes under in the form of a monobloc, thus not requiring two separate elements, unlike the infrared barrier This arrangement does not generate a slowdown in the flow of the mobile flow The device, according to a first characteristic, comprises a housing comprising a first share two transmitters (1 and 4) each having the function of emitting a beam towards a mobile by means of optical means, on the other hand a reception system made up of two elements (2 and 3) capturing the beam reflected by the mobile passing through the detection zone by means of a reception optic, and thirdly an electronic control of the emission elements (1 and 4) and of processing of the signals received by the reception elements (2 and 3). The first and second transmitters (1 and 4), as well as the reception elements, are infrared diodes. The electronics for controlling each transmission element and for processing the signals received by each reception element comprises a clock (17). pulse generator driving each transmission element, an amplifier (18) amplifying the light signals generated by each reception element, and a blocking sampler (19) synchronized with said clock making it possible to block the amplified signals and to compare them at a reference voltage by means of a comparator (20) The layout of the transmission and reception systems complies with the following relationships
xl = , xD\ α min lxl =, xD \ α min l
χl+ / = , , xD\ a max lχl + / =,, xD \ a max l
Figure imgf000004_0001
x2 + t = J xDl ûmax2 avec t la taille des éléments de réception (2 et 3) dminl distance minimale (12) dmax 1 distance maximale ( 14) dmin2 distance minimale (13) dmax2 distance maximale (15) Dl l'entraxe entre la première optique d'émission (5) et l'optique de réception (6)
Figure imgf000004_0001
x2 + t = J xDl ûmax2 with t the size of the receiving elements (2 and 3) dminl minimum distance (12) dmax 1 maximum distance (14) dmin2 minimum distance (13) dmax2 maximum distance (15) Dl the distance between the first transmission optics (5) and the reception optics (6)
D2 l'entraxe entre la seconde optique d'émission (7) et l'optique de réception (6) f la distance focale de réception (16) xl la distance (9) entre le premier élément de réception (3) et l'axe de l'optique de réception (6) x2. la distance (8) entre le second élément de réception (2) et l'axe de l'optique de réception (6)D2 the distance between the second transmission optic (7) and the reception optic (6) f the focal reception distance (16) xl the distance (9) between the first reception element (3) and the axis of reception optics (6) x2. the distance (8) between the second receiving element (2) and the axis of the receiving optics (6)
Le dispositif intègre deux émetteurs et deux récepteurs infrarouges synchronisés permettant de générer dans le sens de passage des mobiles deux zones de détection dans l'espace. L'existence de ces deux zones de détection virtuelles permet de déterminer le sens de passage des mobiles par réflexion directeThe device incorporates two synchronized infrared transmitters and two receivers making it possible to generate two detection zones in space in the direction of movement of the mobiles. The existence of these two virtual detection zones makes it possible to determine the direction of passage of the mobiles by direct reflection
Les éléments d'émission émettent en permanence des impulsions lumineuses Au repos, lorsqu'aucun mobile n'est présent, les récepteurs ne reçoivent aucun signal Lorsqu'un mobile passe dans la zone de détection du capteur, cette zone étant comprise entre une distance minimale et une distance maximale, il rencontre un premier faisceau Ce faisceau se réfléchit sur le mobile et est détecté par le premier récepteur En poursuivant son déplacement, le mobile coupe ensuite le second faisceau Le second faisceau se réfléchit sur le mobile et est détecté par le second récepteur. La chronologie des faisceaux lumineux reçus permet de déterminer le sens de passage du mobileThe transmitting elements continuously emit light pulses At rest, when no mobile is present, the receivers receive no signal When a mobile passes through the detection zone of the sensor, this zone being between a minimum distance and a maximum distance, it meets a first beam This beam is reflected on the mobile and is detected by the first receiver By continuing its movement, the mobile then cuts the second beam The second beam is reflected on the mobile and is detected by the second receiver. The chronology of the light beams received makes it possible to determine the direction of passage of the mobile
L'existence d'une zone de détection compπse entre une distance minimale et une distance maximale permet de rendre le dispositif insensible à la nature du support sur lequel se déplacent les mobiles Ces distances permettent de détecter uniquement des mobiles ayant une dimension déterminée Les dessins annexés illustrent l'inventionThe existence of a detection zone between a minimum distance and a maximum distance makes it possible to make the device insensitive to the nature of the support on which the mobiles move. These distances make it possible to detect only mobiles having a determined dimension The accompanying drawings illustrate the invention
- figure 1 cette figure représente le dispositif selon l'invention- Figure 1 this figure represents the device according to the invention
- figure 2 cette figure représente les distances minimales et distances maximales de détection- figure 2 this figure represents the minimum distances and maximum detection distances
- figure 3 cette figure représente le synoptique de l'électronique utilisée pour le dispositif- figure 3 this figure represents the block diagram of the electronics used for the device
- figure 4 et 5 ces figures représentent les chronogrammes des signaux de sortie- figure 4 and 5 these figures represent the timing diagrams of the output signals
En référence à la figure 1, le dispositif comporte deux émetteurs de type diode infrarouge (1 et 4) La lumière émise par ces émetteurs infrarouges est focalisée à l'aide d'un dispositif optique d'émission (5 et 7)With reference to FIG. 1, the device comprises two emitters of the infrared diode type (1 and 4) The light emitted by these infrared emitters is focused using an optical emitting device (5 and 7)
Un mobile coupant le faisceau émis par le premier émetteur infrarouge (1 ), réfléchit ce faisceau Le faisceau réfléchi (10) traverse l'optique de réception (6) pour atteindre le premier élément de réception (3) Un signal est alors reçu par le premier élément de réception (3)A mobile cutting the beam emitted by the first infrared transmitter (1), reflects this beam The reflected beam (10) passes through the reception optics (6) to reach the first reception element (3) A signal is then received by the first receiving element (3)
Le mobile continuant son déplacement coupe le faisceau émis par le second émetteur infrarouge (4), et réfléchit ce faisceau Le faisceau réfléchi (1 1) traverse l'optique de réception (6) pour atteindre le second élément de réception (2) Un signal est alors reçu par le second élément de réception (2)The mobile continuing its movement cuts the beam emitted by the second infrared emitter (4), and reflects this beam The reflected beam (1 1) passes through the reception optics (6) to reach the second reception element (2) A signal is then received by the second receiving element (2)
Les signaux reçus sur les éléments de réception (2 et 3) permettent de connaître la présence et le sens de passage du mobile Si le premier élément de réception (3) reçoit un signal avant le second élément de réception (2), le mobile se déplace dans un sens allant du premier élément d'émission (1) vers le second élément d'émission (4) Si le second élément de réception (2) reçoit un signal avant le premier élément de réception (3), le mobile se déplace dans un sens allant du second élément d'émission (4) vers le premier élément d'émission (1)The signals received on the reception elements (2 and 3) make it possible to know the presence and the direction of passage of the mobile If the first reception element (3) receives a signal before the second reception element (2), the mobile moves in a direction from the first transmitting element (1) to the second transmitting element (4) If the second receiving element (2) receives a signal before the first receiving element (3), the mobile moves in a direction from the second transmitting element (4) to the first transmitting element (1)
Le dispositif selon l'invention permet la détection des mobiles coupant le faisceau émis par le premier émetteur (1) sur une zone compπse entre une distance minimale (12) et une distance maximale (14). Il permet la détection des mobiles coupant le faisceau émis par le second émetteur infrarouge (4) sur une zone compπse entre une distance minimale (13) et une distance maximale (15). Les distances maximale (14) et minimale (12) sont déterminées par la focale ( 16) de l'optique de réception (6), la taille de la surface sensible du premier élément de réception (3), la distance (9) entre le premier élément de réception (3) et l'axe de l'optique de réception (6), l'entraxe de l'optique d'émission (5) et de l'optique de réception (6) Les distances maximale (15) et minimale (13) sont déterminées par la focale (16) de l'optique de réception (6), la taille de la surface sensible du premier élément de réception (2), la distance (8) entre le second élément de réception (2) et l'axe de l'optique de réception (6), l'entraxe de l'optique d'émission (7) et de l'optique de réception (6) En référence à la figure 3, les éléments d'émission (1 et 4) sont pilotés par des impulsions fournies par une horloge (17). Les signaux lumineux puisés reçus par les éléments de réception (2 et 3) sont amplifiés au moyen d'un amplificateur (18). Après amplification, les signaux reçus sont bloqués de façon synchrone à l'horloge d'émission au moyen d'un échantillonneur bloqueur (19), pour pouvoir être comparés à une tension de référence dans un comparateur (20). Le résultat de cette comparaison donne le signal de sortie 1 et le signal de sortie 2.The device according to the invention allows the detection of mobiles cutting the beam emitted by the first transmitter (1) over a zone compπse between a minimum distance (12) and a maximum distance (14). It allows the detection of mobiles cutting the beam emitted by the second infrared emitter (4) over a zone compπse between a minimum distance (13) and a maximum distance (15). The maximum (14) and minimum (12) distances are determined by the focal length (16) of the reception optics (6), the size of the sensitive surface of the first reception element (3), the distance (9) between the first reception element (3) and the axis of the reception optics (6), the distance between the transmission optics (5) and the reception optics (6) The maximum distances (15 ) and minimum (13) are determined by the focal length (16) of the reception optics (6), the size of the sensitive surface of the first reception element (2), the distance (8) between the second reception element (2) and the axis of the reception optics (6), the distance between the transmission optics (7) and the reception optics (6) With reference to FIG. 3, the transmission elements (1 and 4) are controlled by pulses supplied by a clock (17). The pulsed light signals received by the reception elements (2 and 3) are amplified by means of an amplifier (18). After amplification, the received signals are blocked synchronously with the transmission clock by means of a blocking sampler (19), so that they can be compared with a reference voltage in a comparator (20). The result of this comparison gives the output signal 1 and the output signal 2.
La figure 4 représente les chronogrammes des signaux de sortie (sortie 1 et sortie 2) pour un mobile passant dans le sens premier élément d'émission (1) vers deuxième élément d'émission (2). Des signaux en forme de créneau apparaissent au moment où les éléments de réception ne reçoivent plus de signal.FIG. 4 represents the timing diagrams of the output signals (output 1 and output 2) for a mobile passing in the direction first transmission element (1) towards second transmission element (2). Niche-shaped signals appear when the receiving elements no longer receive a signal.
La figure 5 représente les chronogrammes des signaux de sortie (sortie 1 et sortie 2) pour un mobile passant dans le sens deuxième élément d'émission (2) vers premier élément d'émission (1). Des signaux en forme de créneau apparaissent au moment où les éléments de réception ne reçoivent plus de signal.FIG. 5 represents the timing diagrams of the output signals (output 1 and output 2) for a mobile passing in the direction from the second transmission element (2) to the first transmission element (1). Niche-shaped signals appear when the receiving elements no longer receive a signal.
Ces chronogrammes permettent de déterminer le sens de passage des mobiles, en effectuant un traitement à l'aide d'un graphe d'état.These chronograms make it possible to determine the direction of passage of the mobiles, by carrying out a processing using a state graph.
Selon une variante non représentée, le dispositif peut être doté de 2 optiques de réceptions, chacune étant associée à un élément de réception (2 et 3)According to a variant not shown, the device can be provided with 2 reception optics, each being associated with a reception element (2 and 3)
Les principales applications industrielles du dispositif sont notamment la détection et la détermination du sens de passage de mobiles se déplaçant seuls ou en groupe et dans divers lieux en vue du comptage. Par exemple, il s'agit du comptage de personnes entrant et sortant d'un moyen de transport de personnes (métro, bus, train...) ou d'un lieu public ou privé, comptage notamment d'objets passant sur un tapis roulant, comptage de véhicules...The main industrial applications of the device are in particular the detection and determination of the direction of passage of mobiles moving alone or in groups and in various places for counting. For example, it is the counting of people entering and leaving a means of transport for people (metro, bus, train ...) or a public or private place, counting in particular of objects passing on a carpet driving, counting vehicles ...
Plusieurs dispositifs selon l'invention peuvent être associés pour détecter et déterminer le sens de passage de mobiles se déplaçant de front, en vue du comptage (cas de personnes se déplaçant dans un couloir de métro par exemple). Le nombre de dispositifs à employer dépend de la taille, de la forme et du type de mobiles à détecter. Les dispositifs employés de la manière décrite ci-dessus doivent être synchronisés de telle sorte qu'il n'y ait pas de parasitage optique. La disposition des dispositifs décrite ci-dessus permet un traitement plus poussé des informations fournies en sortie des dispositifs. Les traitements peuvent être les suivants :Several devices according to the invention can be combined to detect and determine the direction of passage of mobiles moving head-on, for the purpose of counting (in the case of people moving in a metro corridor for example). The number of devices to be used depends on the size, shape and type of mobile to be detected. The devices used as described above must be synchronized so that there is no optical interference. The arrangement of the devices described above allows further processing of the information supplied at the output of the devices. The treatments can be as follows:
redondance : les signaux fournis par des dispositifs voisins peuvent être comparés pour obtenir une information fiable.redundancy: the signals supplied by neighboring devices can be compared to obtain reliable information.
analyse : les signaux fournis par les dispositifs peuvent être analysés pour détecter la présence et déterminer le sens de passage de mobiles se déplaçant selon un axe mal défini (cas de piétons dans un couloir de métro par exemple) analysis: the signals provided by the devices can be analyzed to detect the presence and determine the direction of passage of mobiles moving along an ill-defined axis (case of pedestrians in a metro corridor for example)

Claims

REVENDICATIONS
1) Dispositif de détection de présence et de sens de passage de mobiles en vue du comptage, caractérisé en ce qu'il comporte un boîtier comprenant d'une première part deux émetteurs (1 et 4) ayant pour fonction d'émettre chacun un faisceau en direction d'un mobile par l'intermédiaire de moyens optiques, d'une seconde part un système de réception constitué de deux éléments (2 et 3) captant le faisceau réfléchi par le mobile passant dans la zone de détection par l'intermédiaire d'une optique de réception, et d'une troisième part une électronique de pilotage des éléments d'émission (1 et 4) et de traitement des signaux reçus par les éléments de réception (2 et 3).1) Device for detecting the presence and direction of passage of mobiles with a view to counting, characterized in that it comprises a housing comprising firstly two transmitters (1 and 4) having the function of each emitting a beam in the direction of a mobile via optical means, secondly a reception system consisting of two elements (2 and 3) receiving the beam reflected by the mobile passing through the detection zone via 'a reception optic, and thirdly an electronic control of the transmission elements (1 and 4) and processing of the signals received by the reception elements (2 and 3).
2) Dispositif selon la revendication 1 caractérisé en ce que les premier et second émetteurs (1 et 4), sont des diodes infrarouges2) Device according to claim 1 characterized in that the first and second transmitters (1 and 4) are infrared diodes
3) Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que les éléments de réception (2 et 3) sont des diodes infrarouges3) Device according to one of claims 1 or 2, characterized in that the receiving elements (2 and 3) are infrared diodes
4) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'électronique de pilotage de chaque élément d'émission et de traitement des signaux reçus par chaque élément de réception comporte une horloge (17) génératrice d'impulsion pilotant chaque élément d'émission, un amplificateur (18) amplifiant les signaux lumineux générés par chaque élément de réception, et un échantillonneur bloqueur (19) synchronisé avec ladite horloge permettant de bloquer les signaux amplifiés et de comparer ceux-ci à une tension de référence au moyen d'un comparateur (20).4) Device according to any one of the preceding claims, characterized in that the electronic control of each transmission element and of processing of the signals received by each reception element comprises a clock (17) pulse generator driving each transmission element, an amplifier (18) amplifying the light signals generated by each reception element, and a blocking sampler (19) synchronized with said clock making it possible to block the amplified signals and to compare them with a reference voltage with using a comparator (20).
5) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la disposition des systèmes d'émission et de réception est conforme aux relations suivantes5) Device according to any one of the preceding claims, characterized in that the arrangement of the transmission and reception systems conforms to the following relationships
Figure imgf000007_0001
Figure imgf000007_0001
xl+ t ≈ ~- x£>l α max l x2 = ~ — χD2 <2 mιn2 x2 + l = -~ χD2 α max 2 avec t: la taille des éléments de réception (2 et 3) dminl : distance minimale (12) dmaxl : distance maximale (14) dmin2: distance minimale (13) dmax2: distance maximale (15)xl + t ≈ ~ - x £> l α max l x2 = ~ - χD2 <2 mιn2 x2 + l = - ~ χD2 α max 2 with t: the size of the receiving elements (2 and 3) dminl: minimum distance (12) dmaxl: maximum distance (14) dmin2: minimum distance (13) dmax2: maximum distance (15)
Dl : l'entraxe entre la première optique d'émission (5) et l'optique de réception (6)Dl: the distance between the first transmission optics (5) and the reception optics (6)
D2: l'entraxe entre la seconde optique d'émission (7) et l'optique de réception (6) f: la distance focale de réception (16) xl : la distance (9) entre le premier élément de réception (3) et l'axe de l'optique de réception (6) x2: la distance (8) entre le second élément de réception (2) et l'axe de l'optique de réception (6) D2: the distance between the second transmission optics (7) and the reception optics (6) f: the focal reception distance (16) xl: the distance (9) between the first reception element (3) and the axis of the receiving optics (6) x2: the distance (8) between the second receiving element (2) and the axis of the receiving optics (6)
PCT/FR1995/001473 1994-06-08 1995-12-14 Device for detecting the presence and direction of passage of mobiles and persons with the view to counting them WO1997022089A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR9406962A FR2721126A1 (en) 1994-06-08 1994-06-08 Detector for presence and sense of motion for counting people or objects
PT95942739T PT867018E (en) 1994-06-08 1995-12-14 DEVICE FOR DETECTING PRESENCE AND MEASURING THE PASSAGE OF BODIES IN MOVEMENT AND PEOPLE WITH A VIEW TO THEIR COUNT
ES95942739T ES2173212T3 (en) 1994-06-08 1995-12-14 DEVICE FOR DETECTION OF PRESENCE AND SENSE OF PASSAGE OF MOBILE AND PEOPLE WITH VIEWS TO THEIR COUNT.
PCT/FR1995/001473 WO1997022089A1 (en) 1994-06-08 1995-12-14 Device for detecting the presence and direction of passage of mobiles and persons with the view to counting them
DE69525981T DE69525981T2 (en) 1994-06-08 1995-12-14 DEVICE FOR DETECTING THE PRESENT AND PASSING DIRECTION OF MOVABLE OBJECTS AND PERSONS WITH THE INTENTION TO COUNT THEM
EP95942739A EP0867018B1 (en) 1994-06-08 1995-12-14 Device for detecting the presence and direction of passage of mobiles and persons with the view to counting them

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FR9406962A FR2721126A1 (en) 1994-06-08 1994-06-08 Detector for presence and sense of motion for counting people or objects
PCT/FR1995/001473 WO1997022089A1 (en) 1994-06-08 1995-12-14 Device for detecting the presence and direction of passage of mobiles and persons with the view to counting them

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WO2001024118A1 (en) * 1999-09-29 2001-04-05 Dine O Quick (Uk) Limited Counting apparatus
FR2891078A1 (en) * 2005-09-19 2007-03-23 Autoroutes Du Sud De La France Transit document distribution terminal for toll entrance terminal, has optical sensor to detect vehicle presence at entrance terminal, and departure detector with optical sensors to activate document distribution based on vehicle situation
CN106779035A (en) * 2017-01-15 2017-05-31 上海与德信息技术有限公司 Number system and method
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WO2001024118A1 (en) * 1999-09-29 2001-04-05 Dine O Quick (Uk) Limited Counting apparatus
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ES2173212T3 (en) 2002-10-16
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EP0867018A1 (en) 1998-09-30
FR2721126B1 (en) 1997-02-28
DE69525981D1 (en) 2002-04-25
EP0867018B1 (en) 2002-03-20
DE69525981T2 (en) 2002-11-21

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