ELECTRONIC CONTROL UNIT FOR ANTI-COLLISION ALARM AND DRIVING ASSISTANCE FOR ROAD MOTOR VEHICLES.

Abstract

L'invention concerne une centrale électronique d'alarme anti-collision et d'aide à la conduite pour véhicules automobiles routiers. Le module de traitement (MT) à base de composant microprogrammé compare pour chaque vitesse (V) du véhicule, la distance (D) qui le sépare du véhicule qui le précède, avec une distance de sécurité (Dr) donnée en référence. Lorsque l'écart (D-Dr) visualisé sur le module (MA) devient négatif, la centrale génère une alarme visuelle en (MA) et sonore en (MS), qui s'amplifie avec le risque croissant de collision. Le module (MP) et les entrées (EN), (S), (P), (G), (B), et (VS), permettent selon des coefficients appropriés, d'adapter manuellement ou automatiquement, la distance de sécurité (Dr) aux paramètres relatifs à l'état d'entretien du véhicule, aux aptitudes du conducteur, aux conditions météorologiques, en fonction des différents types de véhicules concernés: véhicules légers, poids lourds, transports en commun et à leur type de système de freinage. La centrale informe également le conducteur des dépassements des limitations de vitesse imposées réglementairement selon le type de véhicules. La modification du logiciel de gestion et des paramètres de la centrale permet la réversibilité du dispositif anti-collision en configuration arrière. La centrale selon l'invention trouve son application dans le domaine de l'industrie automobile et de la sécurité routière.

Description

The electronic collision avoidance and driver assistance system for road motor vehicles, the subject of patent application filed on April 13, 1989 under number 89 05179, allows, by means of the MS module generating the audible alarm based on the speed level measured at input V, the creation of a single, double, or triple "hip" depending on whether the vehicle crosses the first, second, or third standardized speed threshold VN, so as to allow the driver to recognize without ambiguity arises from the different speed limits reached, depending on the type of. vehicles initialized by the MP module, and managed by the management module V is described in the general flowchart of the treatment given in figure 3. The modulation of the "beep" is achieved by simply modifying the power plant management software. REVERSIBILITY OF THE ANTI-COLLISION ALARM DEVICE. The electronic anti-collision alarm and driver assistance control unit for road vehicles allows, through adaptation of the management software, the reversibility of the anti-collision device. Indeed, in the same way that the forward collision warning is triggered by the vehicle distance measuring device located in front of the vehicle when it gets too close to the one in front, the rear collision warning can be triggered by the vehicle distance measuring device located at the rear of the vehicle. this one when it is followed too closely by a following vehicle. The system's reversibility is achieved by a simple modification of the control unit's software and by changing the values ​​of the corresponding parameters initialized by the constant table in ROM memory. In this rear-facing configuration, where the distance measuring device is placed at the rear of the vehicle and directed towards the following vehicle, the alarm is primarily directed at the driver of the following vehicle, as the MA module's display function in the followed vehicle is neutralized. The primary alarm then consists of, on the active output AL, triggering a progressive, alternating flashing of the rear lights of the equipped vehicle being followed, on the one hand, to alert the driver of the following vehicle to its dangerous proximity, and on the other hand, a warning light on the dashboard, connected to the AL output and flashing simultaneously, providing a secondary alarm to visually inform the driver. the driver of the equipped vehicle followed by the triggering of the alarm. A progressive flashing pattern, alternating left and right depending on the danger, of the rear reversing lights (white) and / or hazard warning lights (orange), used separately or simultaneously, would differentiate this particular use in case of an alarm from other normal uses of the rear signals. The calculation of the rear safety distance Dr would be done using a more "strict" formula than that of the front configuration, so that the alarm would only trigger if the safety distance, taking into account speed and other parameters, is exceeded by more than 50% of the value adopted in front configuration. The basic formula for calculating the rear safety distance Dr could be V2 / 600, modulated with the following parameters: a) for internal parameters initialized on the control unit during vehicle installation; - light vehicle VL = 1 - public transport TC = 1.15 - heavy goods vehicle PL = 1.36 - anti-lock braking system (ABR) = 1.25* - threshold speed VS = 50 km / h (* 0.75 in the "front" configuration) b) for external parameters taking into account weather conditions; - rain Cp = 1.45 - fog Cb = 1.75 - snow / ice Cg = 2 (The two parameters Cs-sensitivity and Ce-on-board computer will be neutralized in this configuration). The parameter values ​​suggested above are obviously indicative and can be set differently to ensure compatibility. with the regulations or standards in force depending on the country.

Claims

DEMANDS. 1) Electronic control unit according to claims 1, 3 and 8 of main patent characterized in that it allows, with the sound module (MS), a modulation of the "beep" of exceeding the different standardized speeds (VN), by the emission of a single, double or triple "beep" depending on whether the vehicle crosses the first, second or third level of standardized speeds (VN), corresponding to the speed limits set by regulation. 2) Electronic control unit according to the patent claims principal considerations taken as a whole, characterized in that it allows, by simple modification of the management software and the value of the parameters, the reversibility of the anti-collision alarm system in rear configuration. 3) Electronic control unit according to claims 3, 4, 5, 6, 7, 11 and 12 of the main patent and claim 2 above characterized in that it allows, via the active output (AL), the control of the emission of a primary visual alarm by alternating progressive flashing of light signals located at the rear of the vehicle and simultaneously a visual alarm secondary reminder to the dashboard.