Rear-end collision

About: Rear-end collision is a research topic. Over the lifetime, 618 publications have been published within this topic receiving 5666 citations. The topic is also known as: shunt.

Anti-dive control method in rear end collision preventing system

Abstract: PURPOSE: To prevent nose dive and improve braking efficiency by controlling a brake actuator while controlling a suspension control means in such a way as to obtain a suspension constant corresponding to necessary braking force when there is rear-end collision danger. CONSTITUTION: The present speed Vo of one's own vehicle is measured by a vehicle speed sensor 1, and the present inter-vehicle distance LF between one's own vehicle and a preceding vehicle is measured by an inter-vehicle distance sensor 2. The existence of rear-end collision danger is judged by whether the stop distance at the time of one's own vehicle being decelerated at the specified deceleration from the present speed Vo is the present inter-vehicle distance LF or more. In the case of judging the existence of rear-end collision danger, necessary braking force is computed in a brake control ECU 3, and the spring constants of front-rear wheels by both spring/dampers 12, 13 are made large by a suspension control ECU 15 on the basis of the suspension spring constant and damping constant read out according to the computed braking force. Brake control is then performed in the brake control ECU 3. COPYRIGHT: (C)1993,JPO&Japio

Rear-end collision prevention telemetering device for trains

Abstract: The utility model relates to a rear-end collision prevention telemetering device for trains On first and second trains running in the same line, the first train is installed with a signal response device while the second train is installed with a radar; the radar is connected with a signal processing system; the signal processing system has two outputs, and one output is connected with a display screen while the other output is connected with a brake system; a train distance and a train speed module corresponding to the train distance are disposed in the signal processing system; a signal emitted from the radar of the second train is fed back to the second train through the response device of the first train; the signal processing system of the second train compares the train speed with the train distance and sends a corresponding response measure signal; and the instruction display screen and the brake device display various parameters and make measures of reducing speed and stopping the trains

Rear-end collision avoidance warning light control system

Abstract: The invention discloses a rear-end collision avoidance warning light control system and belongs to the field of rear-end collision avoidance safety. The rear-end collision avoidance warning light control system comprises a signal acquisition and processing module, a motor driving and execution module and an imaging device, wherein the signal acquisition and processing module comprises a camera, aBCM module and a signal processor; the camera and the BCM module are both connected to the signal processor; the motor driving and execution module comprises a motor driving chip, a horizontal motor and a vertical motor; the motor driving chip is separately connected to the signal processor, the horizontal motor and the vertical motor; the imaging device comprises a DMD controller and a DLP projection device; and the DMD controller is separately connected to the signal processor and the DLP projection device. By tracking position and distance information of a rear vehicle and combining state information of a vehicle, the rear-end collision avoidance warning light control system can project a rear-end collision avoidance warning sign or text on the road surface in front of the rear vehicleso as to avoid a rear-end collision caused by an extremely short distance between the vehicles.

Seat device for absorbing shock when vehicle collides

Abstract: PROBLEM TO BE SOLVED: To solve a problem that a structure of a conventional shock absorbing type seat rail is a shock absorbing mechanism of only a seat, and not resistant to a shock since a conventional shock absorbing type seat rail has a structure of an upper rail movably arranged on a lower rail and an operation lever arranged on the upper rail, and has the structure of reducing damage at an impact while not impairing the restricting performance of an occupant by movably supporting the upper rail by the operation lever and by making the upper rail movable by the compression of a movable member out-fitted to the operation lever at a rear end collision (in impacting).SOLUTION: A seat slide device of a vehicle includes a fixed rail, an intermediate rail and a moving rail. In the seat device, the moving rail moves with the intermediate rail as a guide in a head-on collision and a rear-end collision (at a shock), a seat back forwardly falls or backwardly falls by the advance/retreat of the moving rail, and the shock is absorbed at the impact when a seating part of a seat sinks in.

Warning device used for avoiding rear-end collision again after car accident or car breakdown

Abstract: The invention relates to a warning device used for avoiding rear-end collision again after a car accident or a car breakdown. The warning device can be started manually after the car accident or the car breakdown and can be started automatically when the car accident happens. The warning device comprises a power source device, a wireless warning transmitting circuit, a wireless warning receiving circuit, a control circuit and the like. The warning device has the advantages that after the car accident or the car breakdown, the warning device can be started manually or automatically to transmit wireless warning signals to rear cars, and the rear cars can receive the wireless warning signals immediately and give alarms, so that the rear cars can be informed of the car accident or the car breakage in the front and can take relevant measures to avoid rear-end collision.