LU88044A1 - AUDIBLE ALARM CONTROL SYSTEM FOR CAR STEERING WHEELS EQUIPPED WITH AN AIR-BAG DEVICE - Google Patents
AUDIBLE ALARM CONTROL SYSTEM FOR CAR STEERING WHEELS EQUIPPED WITH AN AIR-BAG DEVICE Download PDFInfo
- Publication number
- LU88044A1 LU88044A1 LU88044A LU88044A LU88044A1 LU 88044 A1 LU88044 A1 LU 88044A1 LU 88044 A LU88044 A LU 88044A LU 88044 A LU88044 A LU 88044A LU 88044 A1 LU88044 A1 LU 88044A1
- Authority
- LU
- Luxembourg
- Prior art keywords
- fsr
- bag
- air
- cover
- steering wheel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9625—Touch switches using a force resistance transducer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
- B60Q5/001—Switches therefor
- B60Q5/003—Switches therefor mounted on the steering wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
- B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
- B60R21/21656—Steering wheel covers or similar cup-shaped covers
- B60R21/21658—Steering wheel covers or similar cup-shaped covers with integrated switches, e.g. horn switches
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Air Bags (AREA)
Description
SYSTEME DE COMMANDE D'AVERTISSEUR SONORE POUR VOLANT DE VOITURES EQUIPEES D'UN DISPOSITIF AIR-BAGAUDIO ALARM CONTROL SYSTEM FOR STEERING WHEEL OF CARS EQUIPPED WITH AN AIR-BAG DEVICE
La présente invention concerne un système de commande d'avertisseur sonore pour volant de voitures équipées d'un dispositif "air-bag" comprenant un capteur de force du type FS R.The present invention relates to a horn control system for steering wheel of cars equipped with an "air-bag" device comprising a force sensor of the FS R type.
Les capteurs de force connus sous la marque FSR qui est l'abréviation de "Force Sensing Resistor" sont proposés par les brevets US 4,314,228 et US 4,489,302. Les FSR sont constitués de deux pellicules de polymère. Un réseau de conducteurs est déposé sur l'une des pellicules sous forme de deux peignes d'électrodes en disposition interdigitale. Sur l'autre pellicule est déposé un polymère semi-conducteur. Les deux pellicules sont scellées l'une à l'autre par un adhésif double face découpé de telle façon que les peignes d'électrodes effleurent la couche semi-conductrice. Lorsqu'aucune force, n'est appliquée à un tel FSR, la résistance entre les bornes des peignes d'électrodes est très élevée, généralement de l'ordre de plusieurs mega-ohms. Par contre, lorsque le FSR est soumis à une force perpendiculairement à sa surface, la résistance diminue proportionnellement à l'intensité de la force. C'est cette propriété qui est mise à profit dans la présente application.The force sensors known under the brand FSR which is the abbreviation for "Force Sensing Resistor" are proposed by US patents 4,314,228 and US 4,489,302. FSR are made up of two polymer films. A network of conductors is deposited on one of the films in the form of two combs of electrodes in an interdigital arrangement. On the other film is deposited a semiconductor polymer. The two films are sealed to each other by a double-sided adhesive cut in such a way that the electrode combs touch the semiconductor layer. When no force is applied to such an FSR, the resistance between the terminals of the electrode combs is very high, generally of the order of several mega-ohms. On the other hand, when the FSR is subjected to a force perpendicular to its surface, the resistance decreases in proportion to the intensity of the force. It is this property which is taken advantage of in the present application.
Le système "air-bag" est un dispositif de sécurité utilisé dans l'automobile et destiné à protéger l'occupant du véhicule en cas de choc violent. Lorsque la personne à protéger est le conducteur de la voiture, le système "air-bag" est logé dans le volant de direction. Il est constitué d'un sac, situé derrière la plaque centrale de garniture du volant; ce sac se gonfle rapidement devant le visage de l'occupant en cas de nécessité. La personne est ainsi protégée des objets coupants ou durs, comme par exemple le pare-brise.The "air-bag" system is a safety device used in the automobile and intended to protect the occupant of the vehicle in the event of a violent impact. When the person to be protected is the driver of the car, the "air-bag" system is housed in the steering wheel. It consists of a bag, located behind the central steering wheel trim plate; this bag inflates quickly in front of the occupant's face if necessary. The person is thus protected from sharp or hard objects, such as for example the windshield.
Dans certaines voitures, l'actionneur de l'avertisseur sonore est également logé dans le volant de direction. Pour des raisons d'encombrement, la présence de l'"air-bag" au centre du volant rend difficile l'implantation d'un commutateur classique de commande d'avertisseur.In some cars, the horn actuator is also housed in the steering wheel. For reasons of space, the presence of the "air-bag" in the center of the steering wheel makes it difficult to install a conventional horn control switch.
Il existe trois types de solutions techniques. La première consiste à utiliser un commutateur à membrane pour déclencher l'avertisseur sonore. Le placement de ce contacteur est délicat et le fonctionnement devient défectueux pour une température voisine du zéro degré celsius car le couvercle de garniture devient rigide dans cette plage de température et la force à appliquer pour la déformer suffisament et actionner le contacteur à membrane devient trop élevée. Les spécifications requises par l'industrie automobile sont de -30°C à +85°C.There are three types of technical solutions. The first is to use a membrane switch to trigger the horn. The placement of this contactor is delicate and the operation becomes faulty for a temperature close to zero degrees celsius because the packing cover becomes rigid in this temperature range and the force to be applied to deform it sufficiently and actuate the membrane contactor becomes too high . The specifications required by the automotive industry are from -30 ° C to + 85 ° C.
Une deuxième solution consiste à placer un contacteur classique qui est actionné non pas par la protection de couverture comme dans le premier cas, mais par un déplacement de l'ensemble du système "air-bag". Cette application nécessite une mécanique de guidage et de maintien de l'ensemble "air-bag" dans le support du volant. Le coût élevé et l'inertie due au poids du dispositif "air-bag" rend cette solution peu efficace.A second solution consists in placing a conventional contactor which is actuated not by the cover protection as in the first case, but by a displacement of the entire "air-bag" system. This application requires mechanical guidance and maintenance of the "air-bag" assembly in the steering wheel support. The high cost and the inertia due to the weight of the "air-bag" device makes this solution not very effective.
Une troisième solution consiste à placer un contacteur en dehors de la zone centrale du volant, en général sur un élément du rayon. Cette méthode implique un actionneur de petites dimensions, ce qui le rend difficilement utilisable en cas d'urgence. Pour des raisons de sécurité, elle tend à être abandonnée.A third solution consists in placing a contactor outside the central zone of the steering wheel, generally on an element of the spoke. This method involves an actuator of small dimensions, which makes it difficult to use in an emergency. For security reasons, it tends to be abandoned.
Le but de la présente invention est de proposer un nouveau type d'actionneur pour avertisseur grâce à la mise en oeuvre d'un ou plusieurs FSR.The aim of the present invention is to propose a new type of actuator for a horn by means of the implementation of one or more FSRs.
Le FSR est utilisé comme contacteur grâce à l'adjonction d'un système de détection de seuil. La pression exercée par la main du chauffeur se traduit par une force sur le capteur. Cette force est transformée en une résistance électrique par le FSR, résistance électrique qui décroît avec l'augmentation de la force appliquée. La mesure de cette résistance renseigne sur la valeur de la pression exercée. Si la résistance descend en dessous d'un seuil pré-établi, l'avertisseur sonore est déclenché.The FSR is used as a contactor thanks to the addition of a threshold detection system. The pressure exerted by the driver's hand results in a force on the sensor. This force is transformed into an electrical resistance by the FSR, an electrical resistance which decreases with the increase in the applied force. The measurement of this resistance provides information on the value of the pressure exerted. If the resistance drops below a preset threshold, the horn is triggered.
Les avantages de cette solution par rapport aux méthodes actuelles proviennent de la faible épaisseur du FSR (200 μτη à 500 jim), du chemin mécanique du contact virtuellement égal à zéro et de la forme quelconque que l'on peut donner au FSR. Ces caractéristiques autorisent un montage simple du capteur, éventuellement un moulage du FSR dans le couvercle même du volant, un fonctionnement fiable entre -40 et +85 °C, ainsi qu'une zone active qui peut couvrir toute la plage centrale du volant.The advantages of this solution compared to current methods come from the small thickness of the FSR (200 μτη at 500 jim), from the mechanical path of the contact virtually equal to zero and from the arbitrary shape that can be given to the FSR. These characteristics allow a simple mounting of the sensor, possibly a molding of the FSR in the same cover of the steering wheel, reliable operation between -40 and +85 ° C, as well as an active area which can cover the entire central range of the steering wheel.
Soit un volant (20) formé d'un arceau (11) relié au centre par des rayons (12) comme illustré figures 1 et 2. L' "air-bag" (15) est logé dans le réceptacle (17) et protégé par le couvercle (13) et éventuellement par un clapet escamotable (14) qui se présente souvent sous la forme d'une grille en matière plastique. Le ou les FSR (10) pour l'activation de l'avertisseur sonore sont placés dans une zone (18) au centre du volant. Ils peuvent être soit moulés dans le corps du couvercle (13), au centre ou surOr a flywheel (20) formed of a hoop (11) connected to the center by spokes (12) as illustrated in Figures 1 and 2. The "air-bag" (15) is housed in the receptacle (17) and protected by the cover (13) and possibly by a retractable valve (14) which is often in the form of a plastic grid. The FSR (s) (10) for activating the horn are placed in a zone (18) in the center of the steering wheel. They can either be molded in the body of the cover (13), in the center or on
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU88044A LU88044A1 (en) | 1991-12-23 | 1991-12-23 | AUDIBLE ALARM CONTROL SYSTEM FOR CAR STEERING WHEELS EQUIPPED WITH AN AIR-BAG DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU88044A LU88044A1 (en) | 1991-12-23 | 1991-12-23 | AUDIBLE ALARM CONTROL SYSTEM FOR CAR STEERING WHEELS EQUIPPED WITH AN AIR-BAG DEVICE |
Publications (1)
Publication Number | Publication Date |
---|---|
LU88044A1 true LU88044A1 (en) | 1993-08-17 |
Family
ID=19731331
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
LU88044A LU88044A1 (en) | 1991-12-23 | 1991-12-23 | AUDIBLE ALARM CONTROL SYSTEM FOR CAR STEERING WHEELS EQUIPPED WITH AN AIR-BAG DEVICE |
Country Status (1)
Country | Link |
---|---|
LU (1) | LU88044A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0739279A1 (en) * | 1994-02-14 | 1996-10-30 | Breed Automotive Technology, Inc. | Horn activator for steering wheels with air bags |
FR2863564A1 (en) * | 2003-12-16 | 2005-06-17 | Sc2N Sa | Steering wheel for use in motor vehicle, has upper face with shallow and upper zones, where one zone form tactile sensor for activating electrical control circuit connected to electrical contacts, to operate klaxon |
-
1991
- 1991-12-23 LU LU88044A patent/LU88044A1/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0739279A1 (en) * | 1994-02-14 | 1996-10-30 | Breed Automotive Technology, Inc. | Horn activator for steering wheels with air bags |
EP0739279A4 (en) * | 1994-02-14 | 2000-12-20 | Breed Automotive Tech | Horn activator for steering wheels with air bags |
FR2863564A1 (en) * | 2003-12-16 | 2005-06-17 | Sc2N Sa | Steering wheel for use in motor vehicle, has upper face with shallow and upper zones, where one zone form tactile sensor for activating electrical control circuit connected to electrical contacts, to operate klaxon |
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