Radar-operated collision avoidance system for roadway vehicles using stored information for determination of valid objects
Braking system for avoiding a collision of a vehicle with an obstacle thereof
Moving obstacle detection system for a vehicle
Automotive collision avoidance and/or air bag deployment radar Patent #: 4673937
ApplicationNo. 193393 filed on 05/12/1988
US Classes:342/71, With control of brakes or steering342/109Combined with determining distance
ExaminersPrimary: Tarcza, Thomas H.
Assistant: Barron, Gilberto Jr.
Attorney, Agent or Firm
Foreign Patent References
International ClassesG01S 013/93
AbstractA radar system for monitoring the headway control distance between a vehicle equipped with a radar system of the present invention and a fixed or moving object of immediate concern in front thereof. The system employs an antenna positioned in front of the vehicle, transmitter and receiver circuits and signal processing circuits. A transmitted signal from the transmitter circuit when reflected back from an object of immediate concern is received by the receiver circuit and fed into conditioning circuits which separate the received signal into controlling signals that include the range or distance (R) to a detected object of concern, the closing rate (CR) to that object and the vehicle speed of movement (VS). Driving condition modifiers (b1;DM) such as traffic conditions and weather conditions, the level of which are manually chosen by the operator of the vehicle are combined with the received signals to constantly provide changing signals to dynamically determine a hazard level (HZL) which is compared to a preset reference level to 2 according to the mathematical formula or algorithm HZL=R+CR+VSb1;DM. The DMs, which combined collectively with define or replicate the operator's perceived safe drive conditions.