Patent Publication Number: US-2009224944-A1

Title: Vehicle collision avoidance and warning system

Description:
BACKGROUND OF THE PRESENT INVENTION 
     1. Field of the Invention 
     The present invention relates to a vehicle warning system, more particularly to a collision avoidance warning system to prevent from the impending vehicles from rear-end. 
     2. Description of Related Invention 
     Referring to a conventional vehicle warning system, a radar sensor device is located at the front-end of the vehicle for detecting the distance of the vehicle in the front there between, and activates the warning system when the distance there between is closer than the safety distance. However, the warning system for the rear vehicles is in passive pattern, which means the system is unable to avoid the collision from the impending vehicle from the rear end unless that equips with a distance warning system itself. 
     SUMMARY OF THE PRESENT INVENTION 
     The present invention relates to an automatic vehicle collision avoidance and warning system for rear vehicles which comprises a radar sensor device, a speed sensor device, a central control module and an assistive brake light illumination. The radar sensor device is located at rear-end of the vehicle to measure the distance between two moving vehicles. The central control module of the present invention is configured to illuminate the assistive brake light illumination so as to invoke the warning signal to the impending vehicle which is causing the threat to the host vehicle. The central control module is able to automatically assess the driving speed of the incoming vehicle from the rear end so as to invoke the warning signal illuminated from the assistive brake light illumination when that being in excess of safety distance it should keep. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a system flow diagram of the preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1  of the Flow Diagram of the Present Invention Detailed Description of the Preferred Embodiment 
     Referring to  FIG. 1  of the drawings, the automatic vehicle collision avoidance and warning system for rear-end vehicles according to the preferred embodiment of the present invention comprises a radar sensor device ( 10 ), a speed sensor device ( 11 ), a central control module ( 20 ) and an assistive brake light illumination ( 30 ). The radar sensor device ( 10 ) is located at rear-end of the vehicle for measuring the distance between the host vehicle and the rear vehicle. The speed sensor device ( 11 ) is adapted for detecting the driving speed of the vehicle form the rear end. The central control module ( 20 ) is equipped inside the vehicle so as to analyze the data received from the radar sensor device ( 10 ). The assistive brake light illumination ( 30 ) is positioned at rear-end of the vehicle for being activated to warn the vehicles from the rear end when that sensors the distance there between being too close to causing threat. 
     When the vehicle from the rear end is coming toward, the radar sensor device ( 10 ) is activated to measure the safety distance it needs between two moving vehicles. The central control module ( 20 ) is configured to assess the readings of driving speed of the rear vehicle which is detected from the speed sensor device ( 11 ) so as to illuminate the assistive brake light illumination ( 30 ) to invoke the warning signal to the impending vehicles from the rear end.