EP0358587A1 - Device for the detection of pressure on a rubber surface containing carbon - Google Patents

Device for the detection of pressure on a rubber surface containing carbon Download PDF

Info

Publication number
EP0358587A1
EP0358587A1 EP19890470015 EP89470015A EP0358587A1 EP 0358587 A1 EP0358587 A1 EP 0358587A1 EP 19890470015 EP19890470015 EP 19890470015 EP 89470015 A EP89470015 A EP 89470015A EP 0358587 A1 EP0358587 A1 EP 0358587A1
Authority
EP
European Patent Office
Prior art keywords
conductors
rubber
resistance
insulating
detection
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
EP19890470015
Other languages
German (de)
French (fr)
Other versions
EP0358587B1 (en
Inventor
Franck Ligier
Claude Maeder
Marc Nicolle
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.)
Electronique Controle Mesure
Original Assignee
Electronique Controle Mesure
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 Electronique Controle Mesure filed Critical Electronique Controle Mesure
Publication of EP0358587A1 publication Critical patent/EP0358587A1/en
Application granted granted Critical
Publication of EP0358587B1 publication Critical patent/EP0358587B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/10—Mechanical actuation by pressure on floors, floor coverings, stair treads, counters, or tills
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches
    • H01H3/142—Cushion or mat switches of the elongated strip type

Definitions

  • the present invention relates to an electrical support or passage detection device, its production methods and its applications to the detection of passage and the presence of vehicles and pedestrians, and to the production of "remote control switches" sensitive to the pressure.
  • This device consists in part of flat conductive tapes and carbon-laden rubber with low linear electrical resistance.
  • Devices comprising two deformable metal blades glued or held by any means to two opposite faces of a rubber element. These two metallic elements constitute a mechanical switch; when one of the two rubber supports is pressed, it deforms and the metal blades come into contact.
  • the subject of the present invention is the production of detection devices using the surface resistance of carbon-laden rubber, of greater or lesser hardness between 50 and 100 ShoresA, associated with the mechanical properties of the rubbers. It relates to a device for detecting axles or wheels of vehicles on a roadway of the type comprising on the same side of the device two fixed long conductors, placed opposite a deformable conductive rubber element also of great length.
  • the assembly may have the shape of a very long profile which can be extruded.
  • the profile can be rectangular or trapezoidal to be mechanically fixed to the ground.
  • the present invention also relates to the realization of "remote control switches" of great tightness characterized in that they comprise a block of conductive rubber coming into contact under the force of a finger with conductors placed for example on a printed circuit.
  • the present invention also relates to the production of carpets sensitive to the passage or stay of an object or a pedestrian, characterized in that a flat conductive rubber element is deformed through an insulating plate to come into contact. with one or more conductors, the other face of the rubber plate being, as the case may be, electrically insulated or in contact with a second conductor.
  • FIG. 1 describes the basic system according to the invention which comprises: - a rigid or semi-rigid support (1) - electrical conductors (3) placed on an insulating material (2) - carbon-laden rubber (5) with a hardness greater than 50 shores A. - This rubber (5) is linked to the support (1) by a rigid or deformable system (4).
  • the resistance between the conductors 31 and 32, or 32 and 33 is infinite.
  • a low effort and which depends on the mechanical rigidity of the system formed by (4) and (5) will allow the mechanical contact of the rubber (5) with the conductors 31, 32, 33; then the resistance measured between these conductors will be several hundred thousand Ohms.
  • the electrical resistance measured between the conductors 31, 32, or 32 and 33 drops very quickly to become less than a few thousand Ohms.
  • a very simple electronic detection circuit can be produced in which the resistance of the system (8) is compared to that of a potentiometer (9) by a comparator (10). The response (12) from this comparator (10) will be instantaneous. A timer system can be added; then the signal at 13 will only appear after (12) has been held for a time longer than the time delay defined by (11).
  • the present invention applies to the measurement of the passage of vehicles on a roadway using a piece of great length and narrow width, deformable in carbon-laden rubber which comes into contact with two conductors and the resistance of which is measured. using a more or less sophisticated electronic circuit, the two elements being connected by a two-conductor cable not shown.
  • a piece of conductive rubber (14) of hardness greater than or equal to 50 ShoresA, of small cross section and of great length comprises a cavity (19) in which the two conductors are placed ( 16 and 17) on an electrical insulator (18).
  • the two conductors (16 and 17) can be flat or curved. They can be laminated and glued on an insulating support.
  • the assembly of the insulating support (18) and of the two conductors (16 and 17) can also be in the form of a flexible or "flex-rigid" printed circuit.
  • the assembly formed by the two conductors and their insulating support adheres to the lower surface of the profile (14) by any known means, such as cold glue, hot glue, double-sided adhesive, chemical adhesion of rubber ...
  • the profile (14) is installed in a mechanical system (15) which is itself sealed in the roadway (20).
  • the dynamic and static properties of such a system can be adjusted by varying either the hardness of the rubber between 50 and 100 Shores A, used to make the profile (14), or the shape of the cavity (19), or the distance at rest (22) between upper face of the cavity (19) and upper face of the conductors (16 and 17).
  • Such a detection system can have other applications, such as door closing detection, for example in railway or metropolitan cars, or for motorized gate doors.
  • This system is described in Figure 4 where a sensitive element (23) of the type described in Figure 3 is placed on the side of a sliding door (24). Any object (26) will be easily detected when the door (24) is closed in the direction (25) so as to avoid any accident.
  • the device according to FIGS. 5a, b, c and d is produced by molding or molding and gluing of one or two rubber blocks (27) in which is placed a flexible or non-flexible printed circuit (28) on which there are two conductors (29 and 30) arranged for example in a spiral.
  • the device can be produced by placing the conductors on each side of the carbon-laden rubber as shown in FIGS. 6a, b and c, where the carbon-laden rubber plate (34) is in contact on one side with a conductive plate (36) integral with a rigid support (32) and the other with a sheet of insulating material pierced with holes.
  • Another conductive plate (33) integral with another rigid support (32) is placed on the insulating plate. At rest, the resistance between the two conducting planes (33 and 36) is infinite; if a compression force is applied, the rubber deforms through the holes in the plate (35) to come into contact with the upper conductive plane (33), the electronic system described in FIG. 2 will detect this contact.
  • FIG. 6a, b and c the carbon-laden rubber plate
  • the two conductors (33) and (36) can be placed on one side of the conductive rubber (34) by isolating them from the latter by the plate (35).
  • the rubber deforms through holes to come into mechanical contact with the two conductors (33) and (36) so as to allow detection.
  • Such plates can be used for the detection and localization of heavy objects, pedestrians when approaching a road crossing, people near areas where robots or automatic machines move.

Abstract

The present invention relates to a system for the detection of pressure on a face, consisting of a deformable rubber element containing carbon (5) which comes into mechanical contact with conductors (3) placed on an insulator (2), causing the electrical resistance between the conductors (3) to fall from infinity to a few thousand Ohms. Applications to the detection of the passage of vehicles or pedestrians. <IMAGE>

Description

La présente invention est relative à un dispositif électrique de détection d'appui ou de passage, ses procédés de réalisation et ses applications à la détection de passage et de présence de véhicules et de piétons, et à la réali­sation de "télérupteurs" sensibles à la pression.The present invention relates to an electrical support or passage detection device, its production methods and its applications to the detection of passage and the presence of vehicles and pedestrians, and to the production of "remote control switches" sensitive to the pressure.

Ce dispositif est constitué en partie de rubans conducteurs plans et de caoutchouc chargé de carbone à faible résistance électrique linéique.This device consists in part of flat conductive tapes and carbon-laden rubber with low linear electrical resistance.

Il est connu par exemple de réaliser des mesures de détection de véhicules par des tubes pneumatiques à l'intérieur desquels on mesure la varia­tion de pression lors du passage des véhicules. De tels dispositifs ne sont généra­lement sensibles qu'à la variation de pression, mais ne détectent pas une présence, ce qui en limite considérablement l'emploi.It is known, for example, to carry out vehicle detection measurements by pneumatic tubes inside which the variation in pressure during the passage of vehicles is measured. Such devices are generally only sensitive to pressure variation, but do not detect a presence, which considerably limits their use.

Il est également connu des dispositifs comportant deux lames métalliques déformables collées ou tenues par tous moyens à deux faces opposées d'un élément en caoutchouc. Ces deux éléments métalliques constituent un inter­rupteur mécanique ; lorsque l'on appuie sur un des deux support en caoutchouc, il se déforme et les lames métalliques viennent en contact.Devices are also known comprising two deformable metal blades glued or held by any means to two opposite faces of a rubber element. These two metallic elements constitute a mechanical switch; when one of the two rubber supports is pressed, it deforms and the metal blades come into contact.

De tels dispositifs sont délicats à réaliser en raison des pro­blèmes de collage entre métal et caoutchouc et présentent des problèmes de fiabilité dans le temps en raison de leur non-homogénéité mécanique.Such devices are difficult to produce due to the problems of bonding between metal and rubber and present problems of reliability over time due to their mechanical non-homogeneity.

Il est également connu des systèmes de mesure de variation de résistances de couches de mousse de caoutchouc chargée de carbone. Ces systèmes présentent l'inconvénient d'avoir des temps de réponse lents après une compression prolongée dans le temps, et ceci en raison de la faible résistance mécanique de ces mousses caoutchouc.Systems for measuring the variation in resistance of layers of carbon-filled rubber foam are also known. These systems have the disadvantage of having slow response times after prolonged compression over time, and this due to the low mechanical strength of these rubber foams.

La présente invention a pour objet la réalisation de dispositifs de détection utilisant la résistance superficielle de caoutchouc chargé de carbone, de dureté plus ou moins grande comprise entre 50 et 100 ShoresA, associé aux propriétés mécaniques des caoutchoucs. Elle a pour objet un dispositif de détection d'essieux ou de roues de véhicules sur une chaussée du type comportant d'un même côté du dispositif deux conducteurs fixes de grande longueur, placés en regard d'un élément en caoutchouc conducteur déformable également de grande longueur. L'ensemble peut avoir la forme d'un profilé de grande longueur pouvant être extrudé. Le profilé peut être rectangulaire ou trapézoïdal pour être fixé mécaniquement au sol.The subject of the present invention is the production of detection devices using the surface resistance of carbon-laden rubber, of greater or lesser hardness between 50 and 100 ShoresA, associated with the mechanical properties of the rubbers. It relates to a device for detecting axles or wheels of vehicles on a roadway of the type comprising on the same side of the device two fixed long conductors, placed opposite a deformable conductive rubber element also of great length. The assembly may have the shape of a very long profile which can be extruded. The profile can be rectangular or trapezoidal to be mechanically fixed to the ground.

La présente invention a également pour objet la réalisation de "télérupteurs" de grande étanchéité caractérisé en ce qu'ils comportent un bloc de caoutchouc conducteur venant en contact sous l'effort d'un doigt avec des conducteurs placés par exemple sur un circuit imprimé.The present invention also relates to the realization of "remote control switches" of great tightness characterized in that they comprise a block of conductive rubber coming into contact under the force of a finger with conductors placed for example on a printed circuit.

La présente invention a également pour objet la réalisation de tapis sensibles au passage ou au séjour d'un objet ou d'un piéton caractérisé en ce qu'un élément plat en caoutchouc conducteur se déforme au travers d'une plaque isolante pour venir en contact avec un ou plusieurs conducteurs, l'autre face de la plaque de caoutchouc étant, suivant les cas, électriquement isolée ou en contact avec un second conducteur.The present invention also relates to the production of carpets sensitive to the passage or stay of an object or a pedestrian, characterized in that a flat conductive rubber element is deformed through an insulating plate to come into contact. with one or more conductors, the other face of the rubber plate being, as the case may be, electrically insulated or in contact with a second conductor.

D'autres caractéristiques et avantages apparaîtront au cours de la description qui va suivre.Other characteristics and advantages will appear during the description which follows.

Aux dessins donnés uniquement à titres d'exemples :

  • - les figures 1a et 1b constituent une description du principe de base de l'invention.
  • - la figure 2 est une vue schématique d'un système électro­nique permettant la détection du contact du caoutchouc chargé de carbone avec les 2 conducteurs.
  • - la figure 3 est une vue schématique en coupe d'un dispositif linéaire selon l'invention.
  • - la figure 4 est une vue schématique de l'application d'un tel système à une sécurité de fermeture de portes coulissantes automatiques
  • - les figures 5a, b, c, sont des vues schématiques en coupe d'un dispositif circulaire selon l'invention constituant une seconde variante de l'invention.
  • - les figures 6a, b et c sont des vues schématiques d'une troisième variante selon l'invention.
  • - les figures 7a, b et c sont des vues schématiques d'une quatrième variante selon l'invention.
To the drawings given only as examples:
  • - Figures 1a and 1b constitute a description of the basic principle of the invention.
  • - Figure 2 is a schematic view of an electronic system for detecting the contact of carbon-laden rubber with the 2 conductors.
  • - Figure 3 is a schematic sectional view of a linear device according to the invention.
  • - Figure 4 is a schematic view of the application of such a system to an automatic sliding door closure security
  • - Figures 5a, b, c, are schematic sectional views of a circular device according to the invention constituting a second variant of the invention.
  • - Figures 6a, b and c are schematic views of a third variant according to the invention.
  • - Figures 7a, b and c are schematic views of a fourth variant according to the invention.

La figure 1 décrit le système de base selon l'invention qui comporte :
- un support rigide ou semi-rigide (1)
- des conducteurs électriques (3) placés sur un matériau isolant (2)
- le caoutchouc chargé de carbone (5) de dureté supérieure à 50 shores A.
- Ce caoutchouc (5) est lié au support (1) par un système (4) rigie ou déformable.FIG. 1 describes the basic system according to the invention which comprises:
- a rigid or semi-rigid support (1)
- electrical conductors (3) placed on an insulating material (2)
- carbon-laden rubber (5) with a hardness greater than 50 shores A.
- This rubber (5) is linked to the support (1) by a rigid or deformable system (4).

Lorsque aucun effort n'est appliqué sur (5) dans le sens (5) vers (1), la résistance entre les conducteurs 3₁ et 3₂, ou 3₂ et 3₃ est infinie. Un effort faible et qui dépend de la rigidité mécanique du système formé par (4) et (5) va permettre la mise en contact mécanique du caoutchouc (5) avec les conducteurs 3₁, 3₂, 3₃ ; alors la résistance mesurée entre ces conducteurs sera de plusieurs centaines de milliers d'Ohms. Lorsque l'effort s'accroît, la résis­tance électrique mesurée entre les conducteurs 3₁, 3₂, ou 3₂ et 3₃ chute très rapidement pour devenir inférieure à quelques milliers d'Ohms.When no force is applied to (5) in the direction (5) towards (1), the resistance between the conductors 3₁ and 3₂, or 3₂ and 3₃ is infinite. A low effort and which depends on the mechanical rigidity of the system formed by (4) and (5) will allow the mechanical contact of the rubber (5) with the conductors 3₁, 3₂, 3₃; then the resistance measured between these conductors will be several hundred thousand Ohms. When the force increases, the electrical resistance measured between the conductors 3₁, 3₂, or 3₂ and 3₃ drops very quickly to become less than a few thousand Ohms.

Un circuit électronique de détection très simple peut être réalisé dans lequel la résistance du système (8) est comparée à celle d'un poten­tiomètre (9) par un comparateur (10). La réponse (12) est sortie de ce comparateur (10) sera instantanée. Un système de temporisation peut être ajouté ; alors le signal en 13 n'apparaîtra qu'après que (12) ait été maintenu pendant un temps supérieur à la temporisation définie par (11).A very simple electronic detection circuit can be produced in which the resistance of the system (8) is compared to that of a potentiometer (9) by a comparator (10). The response (12) from this comparator (10) will be instantaneous. A timer system can be added; then the signal at 13 will only appear after (12) has been held for a time longer than the time delay defined by (11).

La présente invention s'applique à la mesure du passage de véhicules sur une chaussée à l'aide d'une pièce de grande longueur et faible largeur, déformable en caoutchouc chargé de carbone qui vient en contact avec deux conducteurs et dont on mesure la résistance à l'aide d'un circuit électronique plus ou moins sophistiqué, les deux éléments étant reliés par un câble à deux conducteurs non représenté. Suivant l'exemple représenté au figures 3a et 3b, une pièce en caoutchouc conducteur (14) du dureté supérieure ou égale à 50 Sho­resA, de faible section et de grande longueur, comporte une cavité (19) dans laquelle sont placés les deux conducteurs (16 et 17) sur un isolant électrique (18). Les deux conducteurs (16 et 17) peuvent être plats ou bombés. Il peuvent être laminés et collés sur un support isolant. L'ensemble du support isolant (18) et des deux conducteurs (16 et 17) peut également se présenter sous la forme d'un circuit imprimé souple ou "flex-rigide". L'ensemble formé par les deux conducteurs et leur support isolant adhère à la surface inférieure du profilé (14) par tous moyens connus, tels que colle à froid, à chaud, adhésif double face, adhérisation chimique du caoutchouc...The present invention applies to the measurement of the passage of vehicles on a roadway using a piece of great length and narrow width, deformable in carbon-laden rubber which comes into contact with two conductors and the resistance of which is measured. using a more or less sophisticated electronic circuit, the two elements being connected by a two-conductor cable not shown. According to the example shown in FIGS. 3a and 3b, a piece of conductive rubber (14) of hardness greater than or equal to 50 ShoresA, of small cross section and of great length, comprises a cavity (19) in which the two conductors are placed ( 16 and 17) on an electrical insulator (18). The two conductors (16 and 17) can be flat or curved. They can be laminated and glued on an insulating support. The assembly of the insulating support (18) and of the two conductors (16 and 17) can also be in the form of a flexible or "flex-rigid" printed circuit. The assembly formed by the two conductors and their insulating support adheres to the lower surface of the profile (14) by any known means, such as cold glue, hot glue, double-sided adhesive, chemical adhesion of rubber ...

Le profilé (14) est implanté dans un système mécanique (15) lui-même scellé dans la chaussée (20).The profile (14) is installed in a mechanical system (15) which is itself sealed in the roadway (20).

Lorsqu'une roue passe sur le profilé qui est implanté comme décrit ci-dessus, elle exerce une pression (21) sur le bourrelet et déforme le profilé (14) ; la partie supérieure de la cavité (19) vient en contact avec les deux conducteurs (16 et 17) et appuie fortement sur ces conducteurs ; la résistance mesurée entre les deux conducteurs (16 et 17) passe donc de l'infini à une valeur de quelques milliers d'Ohms qui est détectée par un système électronique du type de celui décrit à la figure 2.When a wheel passes over the profile which is implanted as described above, it exerts pressure (21) on the bead and deforms the profile (14); the upper part of the cavity (19) comes into contact with the two conductors (16 and 17) and strongly presses on these conductors; the resistance measured between the two conductors (16 and 17) therefore goes from infinity to a value of a few thousand Ohms which is detected by an electronic system of the type of that described in figure 2.

Les propriétés dynamiques et statiques d'un tel système peu­vent être ajustées en faisant varier, soit la dureté du caoutchouc entre 50 et 100 Shores A, utilisé pour réaliser le profilé (14), soit la forme de la cavité (19), soit la distance au repos (22) entre face supérieure de la cavité (19) et face supérieure des conducteurs (16 et 17).The dynamic and static properties of such a system can be adjusted by varying either the hardness of the rubber between 50 and 100 Shores A, used to make the profile (14), or the shape of the cavity (19), or the distance at rest (22) between upper face of the cavity (19) and upper face of the conductors (16 and 17).

Un tel système de détection peut avoir d'autres applications, telles que détection de fermeture de porte par exemple dans les voitures ferro­viaires, ou de Métropolitain, ou pour les portes de grilles motorisées. Ce système est décrit à la figure 4 où un élément sensible (23) du type de celui décrit à la figure 3 est placé sur la face latérale d'une porte coulissante (24). Tout objet (26) sera facilement détecté lors de la fermeture de la porte (24) dans le sens (25) de manière à éviter tout accident.Such a detection system can have other applications, such as door closing detection, for example in railway or metropolitan cars, or for motorized gate doors. This system is described in Figure 4 where a sensitive element (23) of the type described in Figure 3 is placed on the side of a sliding door (24). Any object (26) will be easily detected when the door (24) is closed in the direction (25) so as to avoid any accident.

En variante, on peut réaliser des systèmes de détection souples de petite dimension parfaitement étanches et pouvant aisément remplacer les interrupteurs à distance. Le dispositif suivant les figures 5a, b, c et d, est réalisé par moulage ou moulage et collage d'un ou deux blocs de caoutchouc (27) dans lequel est placé un circuit imprimé souple ou non (28) sur lequel figurent deux conducteurs (29 et 30) disposés par exemple en spirale.As a variant, flexible detection systems of small dimensions can be produced which are perfectly sealed and which can easily replace remote switches. The device according to FIGS. 5a, b, c and d, is produced by molding or molding and gluing of one or two rubber blocks (27) in which is placed a flexible or non-flexible printed circuit (28) on which there are two conductors (29 and 30) arranged for example in a spiral.

Le fait d'appuyer sur la surface supérieure du bloc (27) permet­tra de mettre en contact mécaniquement le caoutchouc chargé de carbone avec les conducteurs (29 et 30). La détection de pression sera toujours effectuée avec un système du type de celui décrit à la figure 2.Pressing on the upper surface of the block (27) will allow the carbon-laden rubber to be brought into mechanical contact with the conductors (29 and 30). The pressure detection will always be carried out with a system of the type described in Figure 2.

En variante, le dispositif peut être réalisé en plaçant les conducteurs de chaque côté du caoutchouc chargé de carbone comme le montre les figures 6a, b et c, où la plaque de caoutchouc chargé de carbone (34) est en contact d'un côté avec une plaque conductrice (36) solidaire d'un support rigide (32) et de l'autre avec une feuille de matériau isolant percé de trous. Une autre plaque conductrice (33) solidaire d'un autre support rigide (32) est placée sur la plaque isolante. Au repos, la résistance entre les deux plans conduc­teurs (33 et 36) est infinie ; si on applique un effort de compression, le caoutchouc se déforme au travers des perçages de la plaque (35) pour entrer en contact avec le plan conducteur supérieur (33), le système électronique décrit à la figure 2 détectera ce contact. En variante, et comme indiqué à la figure 7, on peut disposer les deux conducteurs (33) et (36) sur une seule face du caoutchouc con­ducteur (34) en les isolant de celui-ci par la plaque (35). Lorsque l'on exerce un pression sur (34) par l'intermédiaire d'une plaque (37), le caoutchouc se déforme au travers des trous pour venir en contact mécanique avec les deux conducteurs (33) et (36) de manière à permettre la détection.As a variant, the device can be produced by placing the conductors on each side of the carbon-laden rubber as shown in FIGS. 6a, b and c, where the carbon-laden rubber plate (34) is in contact on one side with a conductive plate (36) integral with a rigid support (32) and the other with a sheet of insulating material pierced with holes. Another conductive plate (33) integral with another rigid support (32) is placed on the insulating plate. At rest, the resistance between the two conducting planes (33 and 36) is infinite; if a compression force is applied, the rubber deforms through the holes in the plate (35) to come into contact with the upper conductive plane (33), the electronic system described in FIG. 2 will detect this contact. As a variant, and as indicated in FIG. 7, the two conductors (33) and (36) can be placed on one side of the conductive rubber (34) by isolating them from the latter by the plate (35). When pressure is exerted on (34) via a plate (37), the rubber deforms through holes to come into mechanical contact with the two conductors (33) and (36) so as to allow detection.

De telles plaque peuvent être utilisées pour la détection et la localisation d'objet pondéreux, de piéton à l'approche de traversée de chaussée, de personnes à proximité de zones ou se déplacent les robots ou engins automati­ques.Such plates can be used for the detection and localization of heavy objects, pedestrians when approaching a road crossing, people near areas where robots or automatic machines move.

Claims (10)

1/ Dispositif de détection d'appui sur une surface caractérisé en ce qu'il comporte un élément en caoutchouc résistif (5) (dont la résistance décroît lorsqu'il est comprimé) placé en regard de deux conducteurs électriques (3. 16. 17...) métalliques équi-répartis sur la surface de mesure et isolé du caout­chouc par une couche d'air déformable (19) entrainant au repos, la mesure d'une résistance infinie entre les deux conducteurs puis lors de l'apparition d'un effort mécanique en n'importe quel point de la surface, l'apparition d'une résistance dite de contact puis la décroissance de cette résistance en fonction de l'effort appliqué : la résistance redevenant infinie instantanément après la disparition de l'effort mécanique F sous l'effet de ressort du caoutchouc.1 / Support detection device on a surface characterized in that it comprises a resistive rubber element (5) (whose resistance decreases when it is compressed) placed opposite two electrical conductors (3. 16. 17 ...) metallic equi-distributed on the measurement surface and isolated from the rubber by a layer of deformable air (19) causing at rest, the measurement of an infinite resistance between the two conductors then during the appearance of a mechanical force at any point on the surface, the appearance of a so-called contact resistance then the decrease in this resistance as a function of the applied force: the resistance becoming infinite instantly after the disappearance of the mechanical force F under the spring effect of the rubber. 2/ Dispositif suivant la revendication 1 caractérisé en ce que les conducteurs (16 -1)7 sont, soit placés d'un même côté du caoutchouc résistif 14 soit placés de part et d'autre de l'élément en caoutchouc résistif (34).2 / Device according to claim 1 characterized in that the conductors (16 -1) 7 are either placed on the same side of the resistive rubber 14 or placed on either side of the resistive rubber element (34) . 3/ Dispositif suivant la revendication 1 caractérisé en ce que la couche d'air (19) isolant au repos les conducteurs (16 - 17) du caoutchouc résistif (14) est obtenue par le moulage du caoutchouc.3 / Device according to claim 1 characterized in that the air layer (19) insulating at rest the conductors (16 - 17) of the resistive rubber (14) is obtained by molding the rubber. 4/ Dispositif suivant la revendication 1 caractérisé en ce que la couche d'air (19) isolant au repos les conducteurs (16 - 17) du caoutchouc résistif (14) est obtenue par interposition entre le caoutchouc résistif (3) et un ou les deux conducteurs (33 - 36) d'un élément isolant électrique (35) portant des évidements.4 / Device according to claim 1 characterized in that the air layer (19) insulating at rest the conductors (16 - 17) of the resistive rubber (14) is obtained by interposition between the resistive rubber (3) and one or more two conductors (33 - 36) of an electrical insulating element (35) carrying recesses. 5/ Dispositif suivant les revendications 1 et 3, caractérisé en ce que la couche d'air est réalisée par des évidements dans une feuille isolante, ou par un dépôt de vernis isolant peint ou sérigraphié ou déposé par tout autre moyen connu.5 / Device according to claims 1 and 3, characterized in that the air layer is formed by recesses in an insulating sheet, or by a deposit of insulating varnish painted or screen printed or deposited by any other known means. 6/ Dispositif suivant les revendications 1 et 2 caractérisé en ce qu'il est formé d'un profilé creux en caoutchouc chargé de carbone, de grande longueur et faible section (14) comportant d'un côté de la cavité et dans la grande longueur, deux conducteurs (16 et 17) isolés (18) du caoutchouc et placé en regard de l'autre face en caoutchouc de la cavité, celle-ci vient en contact mécanique avec les deux conducteurs lorsqu'un effort (21) est appliqué à la surface extérieure du profilé, la chute de résistance entre les deux conducteurs permet la détection de l'appui (21) sur la surface externe du profilé.6 / Device according to claims 1 and 2 characterized in that it is formed of a hollow profile in carbon-laden rubber, of great length and small section (14) comprising on one side of the cavity and in the great length , two conductors (16 and 17) insulated (18) from the rubber and placed opposite the other rubber face of the cavity, the latter comes into contact mechanical with the two conductors when a force (21) is applied to the external surface of the profile, the drop in resistance between the two conductors allows the detection of the support (21) on the external surface of the profile. 7/ Dispositif suivant les revendications 1 et 6, caractérisé en ce que le profilé (14) est placé dans une chaussée (20) directement ou par l'in­termédiaire d'une pièce metallique (15) perpendiculairement au sens de déplace­ment des véhicules pour déterminer le passage ou la présence des essieux.7 / Device according to claims 1 and 6, characterized in that the profile (14) is placed in a roadway (20) directly or by means of a metal part (15) perpendicular to the direction of movement of the vehicles to determine the passage or presence of the axles. 8/ Dispositif suivant les revendications 1 et 6, caractérisé en ce que le couple formé par l'isolant (18) et les conducteurs (16 - 17) est constitué par un circuit imprimé souple ou rigide.8 / Device according to claims 1 and 6, characterized in that the couple formed by the insulator (18) and the conductors (16 - 17) is constituted by a flexible or rigid printed circuit. 9/ Dispositif suivant la revendication 1, caractérisé en ce que sa faible dimension le rend comparable à un bouton poussoir : la chute de résis­tance étant provoquée par la déformation d'une cavité en caoutchouc chargé de carbone (27) dont une face vient en contact mécanique avec deux conducteurs (29 et 30) placés sur un support isolant à l'opposé de la face d'appui de l'effort.9 / Apparatus according to claim 1, characterized in that its small size makes it comparable to a push button: the drop in resistance being caused by the deformation of a carbon-charged rubber cavity (27) of which one face comes into contact mechanical with two conductors (29 and 30) placed on an insulating support opposite the bearing face of the force. 10/ Dispositif suivant la revendication 1, caractérisé en ce que plusieurs éléments séparés peuvent être placés côte à côte pour permettre la localisation d'un objet ou d'un être humain.10 / Device according to claim 1, characterized in that several separate elements can be placed side by side to allow the location of an object or a human being.
EP19890470015 1988-07-27 1989-07-25 Device for the detection of pressure on a rubber surface containing carbon Expired - Lifetime EP0358587B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810349A FR2634926B1 (en) 1988-07-27 1988-07-27 DEVICE FOR DETECTING SUPPORT ON A SURFACE, BY CARBON-CHARGED RUBBER
FR8810349 1988-07-27

Publications (2)

Publication Number Publication Date
EP0358587A1 true EP0358587A1 (en) 1990-03-14
EP0358587B1 EP0358587B1 (en) 1993-12-29

Family

ID=9368980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890470015 Expired - Lifetime EP0358587B1 (en) 1988-07-27 1989-07-25 Device for the detection of pressure on a rubber surface containing carbon

Country Status (3)

Country Link
EP (1) EP0358587B1 (en)
DE (1) DE68911802D1 (en)
FR (1) FR2634926B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582733A1 (en) * 1992-08-11 1994-02-16 LEDA Logarithmic Electrical Devices for Automation S.r.l. A device for monitoring whether a door or window, for example of a building or vehicle, is open or closed
NL9300456A (en) * 1993-03-15 1994-10-03 Marmat Fa Alarm system for a bed, chair or the like and a sensor therefor
CH691151A5 (en) * 1994-06-09 2001-04-30 Edouard Menoud Device monitoring and alerting to the presence of the body in danger in a pool.
CN101984471A (en) * 2010-11-22 2011-03-09 武汉理工大学 Intelligent anti-theft ground pad based on diffuse carbon fiber materials and application thereof
FR2978974A1 (en) * 2011-08-12 2013-02-15 Claude Desgorces FLOORING
GB2511356A (en) * 2013-03-01 2014-09-03 Isensol Ltd Pressure mat

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2791173B1 (en) 1999-03-19 2001-06-29 Electronique Controle Mesure DEVICE FOR DETECTING THE SUPPORT AND PASSING OF A VEHICLE WHEEL ON A PAVEMENT USING A CONDUCTIVE RUBBER AND ITS INSTALLATION METHOD

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342157A (en) * 1929-11-27 1931-01-29 Leopold Rado
DE530544C (en) * 1930-05-06 1931-07-30 Sternberg Traffic Automaten Co Switch for traffic regulator arranged in the street
FR2201512A1 (en) * 1972-10-02 1974-04-26 Acome
US3991415A (en) * 1975-10-02 1976-11-09 Baar Sr Haward A Alarm and light system
FR2415844A1 (en) * 1978-01-30 1979-08-24 Segall Jacques Mat type pressure actuated electrical signal generator - uses two conducting rubber sheets connected to amplifier and separated by perforated insulating sheet
EP0207450A2 (en) * 1985-07-03 1987-01-07 Mitsuboshi Belting Ltd. Pressure-sensitive conductive rubber material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342157A (en) * 1929-11-27 1931-01-29 Leopold Rado
DE530544C (en) * 1930-05-06 1931-07-30 Sternberg Traffic Automaten Co Switch for traffic regulator arranged in the street
FR2201512A1 (en) * 1972-10-02 1974-04-26 Acome
US3991415A (en) * 1975-10-02 1976-11-09 Baar Sr Haward A Alarm and light system
FR2415844A1 (en) * 1978-01-30 1979-08-24 Segall Jacques Mat type pressure actuated electrical signal generator - uses two conducting rubber sheets connected to amplifier and separated by perforated insulating sheet
EP0207450A2 (en) * 1985-07-03 1987-01-07 Mitsuboshi Belting Ltd. Pressure-sensitive conductive rubber material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582733A1 (en) * 1992-08-11 1994-02-16 LEDA Logarithmic Electrical Devices for Automation S.r.l. A device for monitoring whether a door or window, for example of a building or vehicle, is open or closed
NL9300456A (en) * 1993-03-15 1994-10-03 Marmat Fa Alarm system for a bed, chair or the like and a sensor therefor
CH691151A5 (en) * 1994-06-09 2001-04-30 Edouard Menoud Device monitoring and alerting to the presence of the body in danger in a pool.
CN101984471A (en) * 2010-11-22 2011-03-09 武汉理工大学 Intelligent anti-theft ground pad based on diffuse carbon fiber materials and application thereof
FR2978974A1 (en) * 2011-08-12 2013-02-15 Claude Desgorces FLOORING
WO2013024212A1 (en) * 2011-08-12 2013-02-21 Aptim Improved floor covering
US9619987B2 (en) 2011-08-12 2017-04-11 Abcd Innovation Floor covering
GB2511356A (en) * 2013-03-01 2014-09-03 Isensol Ltd Pressure mat
GB2511356B (en) * 2013-03-01 2016-02-17 Isensol Ltd Pressure mat

Also Published As

Publication number Publication date
DE68911802D1 (en) 1994-02-10
FR2634926B1 (en) 1994-03-25
FR2634926A1 (en) 1990-02-02
EP0358587B1 (en) 1993-12-29

Similar Documents

Publication Publication Date Title
EP0358587B1 (en) Device for the detection of pressure on a rubber surface containing carbon
US5621318A (en) Mechanical/electrical displacement transducer
EP3137871B1 (en) System for evaluating the condition of a tyre
CA2692080A1 (en) Obstacle detection device, in particular a frame for a motorised opening panel of a motor vehicle, and resulting opening panel
WO2015097215A1 (en) Impact detection system for robotic device
EP3234541A1 (en) System for evaluating the condition of a tyre
WO2015193812A2 (en) Detection terminal including a piezoelectric transducer secured to a diaphragm connected to an abutment structure
WO2007085762A2 (en) Trapping detection seal for opening leaves of vehicles
EP0553245B1 (en) Detectable device for the identification of optically invisible objects
WO2005012847A2 (en) Electromagnetic loop sensor for measuring dynamic loads applied to a roadway by road traffic
FR2791173A1 (en) DEVICE FOR DETECTING THE SUPPORT AND PASSING OF A VEHICLE WHEEL ON A PAVEMENT USING A CONDUCTIVE RUBBER AND ITS INSTALLATION METHOD
EP0141848A1 (en) Device enabling an easy and reliable checking of the junction of two adjacent bands of construction coating
EP1685997B1 (en) Vehicle with a pressure-sensitive strip close to the edge of a wing
FR2694083A1 (en) Temperature sensor housing - consists of hinged lid provided with male studs for snapping into lower block and cooperating with female part in block for locating sensor, and self-adhesive base
FR2642818A1 (en) Device in elongate web form for identifying buried works, particularly non-metallic ones
EP0256039A1 (en) Dynamic pressure sensor for vehicle tyres
BE1023522B1 (en) Multi-layer adhesive tape to compress and contract a scar
EP0662210A1 (en) Device for the detection of a target using a trip wire
FR2643172A1 (en) LOW SIZE OBSTACLE DETECTOR
EP1848017B1 (en) Electrical control device
EP0343808A3 (en) Pressure sensor device for determining co-ordinates of contact points
FR3075956A1 (en) DETECTION SLAB FOR SOIL COATING AND DETECTION SYSTEM
FR2610406A1 (en) Capacitive pressure sensor
FR2486021A1 (en) Aircraft safety device indicating maximum acceleration - has component with coloured zones emerging from screen and compressing spring
FR2713769A1 (en) Traction force detector.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT NL

17P Request for examination filed

Effective date: 19900328

17Q First examination report despatched

Effective date: 19920512

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19931229

Ref country code: GB

Effective date: 19931229

Ref country code: DE

Effective date: 19931229

REF Corresponds to:

Ref document number: 68911802

Country of ref document: DE

Date of ref document: 19940210

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19931229

ITF It: translation for a ep patent filed

Owner name: RIF. ISCRIZIONE REG.: 26/09/95;ELECTRONIQUE CONTRO

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: GB

Ref legal event code: 777A

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050725