FR2639438A1 - Device for detecting metal bodies - Google Patents

Device for detecting metal bodies Download PDF

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Publication number
FR2639438A1
FR2639438A1 FR8815105A FR8815105A FR2639438A1 FR 2639438 A1 FR2639438 A1 FR 2639438A1 FR 8815105 A FR8815105 A FR 8815105A FR 8815105 A FR8815105 A FR 8815105A FR 2639438 A1 FR2639438 A1 FR 2639438A1
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FR
France
Prior art keywords
transmitter
receiver
open
coil
metal bodies
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR8815105A
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French (fr)
Other versions
FR2639438B1 (en
Inventor
Jean-Paul Martin
Jean-Claude Moisand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cga Hbs
Original Assignee
Cga Hbs
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
Application filed by Cga Hbs filed Critical Cga Hbs
Priority to FR8815105A priority Critical patent/FR2639438B1/en
Publication of FR2639438A1 publication Critical patent/FR2639438A1/en
Application granted granted Critical
Publication of FR2639438B1 publication Critical patent/FR2639438B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils

Abstract

Device for detecting metal bodies, characterised in that it comprises a low-frequency electromagnetic wave transmitter 10, comprising a winding 2 arranged in a half ferrite pot 3 which is open on its face corresponding to the direction or sense of transmission, associated with a receiver 11 comprising a pick-up coil 4 situated in a half ferrite pot 5 which is also open and directed in the same sense as that of the transmitter and receiving the reflected waves emitted by possible metal bodies 9 in relative motion with respect to the transmitter and the receiver.

Description

Dispositif pour détecter des masses métalliques
La présente invention concerne un dispositif pour détecter des masses métalliques.Device for detecting metallic masses
The present invention relates to a device for detecting metallic masses.

En particulier, l'invention s'applique au comptage de véhicules ou pour la détermination des places libres ou occupées sur une aire de stationnement de véhicules. De multiples autres applications peuvent être envisagées. In particular, the invention applies to the counting of vehicles or for the determination of free or occupied places in a vehicle parking area. Many other applications can be envisaged.

L'invention a ainsi pour objet un dispositif pour détecter des masses métalliques, caractérisé en ce qu'il comprend un émetteur d'ondes électromagnétiques à basse fréquence comprenant un bobinage disposé dans un demi pot de ferrite ouvert sur sa face correspondant à la direction et au sens d'émission, associé à un récepteur comprenant une bobine de réception située dans un demi pot de ferrite également ouvert et orienté dans le même sens que celui de l'émetteur et recevant les ondes réfléchies émises par les éventuelles. masses métalliques en déplacement relatif par rapport à l'émetteur et au récepteur. The subject of the invention is therefore a device for detecting metallic masses, characterized in that it comprises a transmitter of low frequency electromagnetic waves comprising a coil disposed in a half pot of ferrite open on its face corresponding to the direction and in the direction of emission, associated with a receiver comprising a reception coil located in a half ferrite pot also open and oriented in the same direction as that of the transmitter and receiving the reflected waves emitted by any. metallic masses in relative displacement with respect to the transmitter and the receiver.

Selon une application particulière, l'émetteur et le récepteur sont disposés à l'intérieur d'un tube guide en haut polymère organique extrudé muni de conducteurs électriques plats permettant l'alimentation et l'acheminement des signaux de l'émetteur et du récepteur, lesquels comportent des frotteurs de contact électrique, l'émetteur et le récepteur étant séparés l'un de l'autre et reliés par une liaison flexible, l'ensemble étant mobile dans le tube et propulsé par un gaz comprimé. According to a particular application, the transmitter and the receiver are arranged inside a guide tube made of high extruded organic polymer provided with flat electrical conductors allowing the supply and the routing of the signals of the transmitter and the receiver, which include electrical contact wipers, the transmitter and the receiver being separated from each other and connected by a flexible link, the assembly being movable in the tube and propelled by a compressed gas.

On va maintenant donner la description d'un exemple de mise en oeuvre de l'invention en se référant au dessin annexé dans lequel
La figure 1 est un schéma représentant le dispositif selon l'invention.We will now give the description of an example of implementation of the invention with reference to the accompanying drawing in which
Figure 1 is a diagram showing the device according to the invention.

La figure 2 est une vue en perspective du dispositif selon l'invention dans une application particulière. Figure 2 is a perspective view of the device according to the invention in a particular application.

La figure 3 montre en vue de face l'un des éléments mobiles (émetteur ou récepteur) de la figure 2. FIG. 3 shows in front view one of the mobile elements (transmitter or receiver) of FIG. 2.

En se reportant à la figure 1, le dispositif de l'invention comprend un émetteur d'ondes électromagnétiques à basse fréquence comportant un générateur 1 alimentant un bobinage 2 situé dans un demi pot en ferrite 3 ouvert sur sa face avant, de telle sorte que le diagramme de rayonnement électromagnétique est dirigé dans l'axe du bobinage et vers l'avant. Le bobinage est par exemple constitué d'un circuit oscillant à doubles bobines, dont l'une comporte par exemple vingt spires et dont l'autre comporte par exemple soixante dix spires et aux bornes de laquelle est relié un condensateur céramique d'une capacité de 10 nF. Le bobinage est alimenté par le générateur 1 à la fréquence d'accord de 132 Khz + 5 Khz.Le dispositif comprend en outre un récepteur qui comporte une bobine de réception 4 située également dans un demi pot en ferrite 5 ouvert également sur sa face avant et dont l'axe 1 est orienté dans la même direction que l'axe . Les bornes de la bobine 4 sont reliées à un amplificateur 6. Le signal obtenu passe ensuite dans des circuits de mise en forme 7 et de traitement 8. La bobine de réception 4 comporte par exemple cents spires. Lorsqu'une masse métallique telle qu'une automobile 9 passe devant cet ensemble repéré globalement 10 pour l'émetteur et 11 pour le récepteur, elle réfléchit l'onde émise par l'émetteur et elle est captée par le récepteur. Referring to Figure 1, the device of the invention comprises a low frequency electromagnetic wave transmitter comprising a generator 1 supplying a coil 2 located in a half ferrite pot 3 open on its front face, so that the electromagnetic radiation diagram is directed in the axis of the winding and towards the front. The winding consists for example of an oscillating circuit with double coils, one of which comprises for example twenty turns and the other of which comprises for example seventy turns and at the terminals of which is connected a ceramic capacitor with a capacity of 10 nF. The winding is powered by the generator 1 at the tuning frequency of 132 Khz + 5 Khz. The device further comprises a receiver which includes a receiving coil 4 also located in a half ferrite jar 5 also open on its front face and whose axis 1 is oriented in the same direction as the axis. The terminals of the coil 4 are connected to an amplifier 6. The signal obtained then passes through shaping 7 and processing circuits 8. The reception coil 4 comprises for example one hundred turns. When a metallic mass such as an automobile 9 passes in front of this assembly marked overall 10 for the transmitter and 11 for the receiver, it reflects the wave emitted by the transmitter and it is picked up by the receiver.

Si ltentrtaxe E est d'environ 40 cm, la distance D de détection est comprise entre 2 et 3 mètres. If the distance E is about 40 cm, the detection distance D is between 2 and 3 meters.

Les figures 2 et 3 montrent une application du dispositif selon l'invention. Figures 2 and 3 show an application of the device according to the invention.

Dans cette application, l'émetteur 10 et le récepteur 11 sont montés dans des mobiles coulissants 12 et 13 à l'intérieur d'un tube guide 14 en haut polymère organique. Les deux mobiles 12 et 13 sont reliés par une liaison flexible 15 permettant de ne pas trop agrandir les rayons de courbure dans les virages. In this application, the transmitter 10 and the receiver 11 are mounted in sliding mobiles 12 and 13 inside a guide tube 14 made of high organic polymer. The two mobiles 12 and 13 are connected by a flexible link 15 making it possible not to enlarge the radii of curvature too much when cornering.

Le tube guide 14 peut également contenir d'autres capteurs d'information, par exemple une caméra vidéo, aussi la face avant 16 du tube est-elle en un matériau transparent. Sur la figure 2, on ne voit qu'une petite portion de cette face avant 16. Les mobiles 12 et 13 sont propulsés par un gaz comprimé. The guide tube 14 can also contain other information sensors, for example a video camera, so the front face 16 of the tube is made of a transparent material. In Figure 2, we see only a small portion of this front face 16. The mobiles 12 and 13 are propelled by a compressed gas.

La figure 3 montre en vue de face l'un des mobiles, par exemple le mobile 12 émetteur. On voit le bobinage et le pot en ferrite 2-3, dans le compartiment voisin, en 17 est située l'électronique, ici le générateur 1 de la figure 1. Le mobile comporte des frotteurs 18 à 25 reliés à des contacts 26 à 33 pour les amenées de courant et différents signaux de départ (pour le récepteur) qui transitent sur des conducteurs électriques plats 34, 35, 36 et 37 qui courent le long du tube guide 14. FIG. 3 shows a front view of one of the mobiles, for example the transmitter mobile 12. We see the winding and the ferrite pot 2-3, in the neighboring compartment, in 17 is located the electronics, here the generator 1 of Figure 1. The mobile has wipers 18 to 25 connected to contacts 26 to 33 for current leads and various starting signals (for the receiver) which pass over flat electrical conductors 34, 35, 36 and 37 which run along the guide tube 14.

Sur la figure 3, on ne voit que les frotteurs 18 à 21 et les contacts 26 à 29, les autres frotteurs et contact étant sur la face arrière. De même, sur la figure 2, on ne voit que les conducteurs 34 et 35, les autres conducteurs 36 et 37 étant situés sur la paroi inférieure du tube guide. In FIG. 3, only the wipers 18 to 21 and the contacts 26 to 29 are seen, the other wipers and contact being on the rear face. Likewise, in FIG. 2, only the conductors 34 and 35 are seen, the other conductors 36 and 37 being located on the lower wall of the guide tube.

Les contacts 26 et 27 sont en parallèles, les frotteurs 18 et 19 frottant donc sur le même conducteur 34. I1 en est de même des contacts 28 et 29.  The contacts 26 and 27 are in parallel, the wipers 18 and 19 therefore rubbing on the same conductor 34. The same is true of the contacts 28 and 29.

Claims (2)

REVENDICATIONS 1/ Dispositif pour détecter des masses métalliques, caractérisé en ce qu'il comprend un émetteur (10) d'ondes électromagnétiques à basse fréquence comprenant un bobinage (2) disposé dans un demi pot de ferrite (3) ouvert sur sa face correspondant à la direction et au sens d'émission, associé à un récepteur (11) comprenant une bobine de réception (4) située dans un demi pot de ferrite (5) également ouvert et orienté dans le même sens que celui de l'émetteur et recevant les ondes réfléchies émises par les éventuelles masses métalliques (9) en déplacement relatif par rapport à l'émetteur et au récepteur.1 / Device for detecting metallic masses, characterized in that it comprises a transmitter (10) of low frequency electromagnetic waves comprising a coil (2) disposed in a half ferrite pot (3) open on its face corresponding to the direction and direction of emission, associated with a receiver (11) comprising a receiving coil (4) located in a half ferrite pot (5) also open and oriented in the same direction as that of the transmitter and receiving the reflected waves emitted by any metallic masses (9) in relative displacement with respect to the transmitter and the receiver. 2/ Dispositif selon la revendication 1, caractérisé en ce que l'émetteur et le récepteur sont disposés à l'intérieur d'un tube guide (14) en haut polymère organique extrudé muni de conducteurs électriques plats (34, 35) permettant l'alimentation et l'acheminement des signaux de l'émetteur et du récepteur, lesquels comportent des frotteurs (18 à 21) de contact électrique, l'émetteur et le récepteur étant séparés l'un de l'autre et reliés par une liaison flexible (15), l'ensemble étant mobile dans le tube et propulsé par un gaz comprimé. 2 / Device according to claim 1, characterized in that the transmitter and the receiver are arranged inside a guide tube (14) made of high extruded organic polymer provided with flat electrical conductors (34, 35) allowing the supply and routing of signals from the transmitter and receiver, which include electrical contact wipers (18 to 21), the transmitter and the receiver being separated from each other and connected by a flexible connection ( 15), the assembly being movable in the tube and propelled by a compressed gas.
FR8815105A 1988-11-21 1988-11-21 DEVICE FOR DETECTING METAL MASSES Expired - Fee Related FR2639438B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8815105A FR2639438B1 (en) 1988-11-21 1988-11-21 DEVICE FOR DETECTING METAL MASSES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8815105A FR2639438B1 (en) 1988-11-21 1988-11-21 DEVICE FOR DETECTING METAL MASSES

Publications (2)

Publication Number Publication Date
FR2639438A1 true FR2639438A1 (en) 1990-05-25
FR2639438B1 FR2639438B1 (en) 1991-02-01

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FR8815105A Expired - Fee Related FR2639438B1 (en) 1988-11-21 1988-11-21 DEVICE FOR DETECTING METAL MASSES

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2820537A1 (en) * 2001-02-08 2002-08-09 Atoll Technology MAGNETIC DETECTOR OF VEHICLE WHEELS

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199329A2 (en) * 1985-04-19 1986-10-29 Omron Tateisi Electronics Co. Vehicle detecting system
EP0230671A1 (en) * 1985-12-30 1987-08-05 Compagnie Generale D'automatisme Cga-Hbs Video-mobile surveillance device
EP0266507A1 (en) * 1986-09-08 1988-05-11 COMPAGNIE GENERALE D'AUTOMATISME CGA-HBS Société Anonyme dite Monitoring device, in particular by using a video camera

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199329A2 (en) * 1985-04-19 1986-10-29 Omron Tateisi Electronics Co. Vehicle detecting system
EP0230671A1 (en) * 1985-12-30 1987-08-05 Compagnie Generale D'automatisme Cga-Hbs Video-mobile surveillance device
EP0266507A1 (en) * 1986-09-08 1988-05-11 COMPAGNIE GENERALE D'AUTOMATISME CGA-HBS Société Anonyme dite Monitoring device, in particular by using a video camera

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2820537A1 (en) * 2001-02-08 2002-08-09 Atoll Technology MAGNETIC DETECTOR OF VEHICLE WHEELS
EP1231581A1 (en) * 2001-02-08 2002-08-14 Atoll Technology Magnetic car wheel sensor
US6670891B2 (en) 2001-02-08 2003-12-30 Atoll Technology Magnetic detector of vehicle wheels

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Publication number Publication date
FR2639438B1 (en) 1991-02-01

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