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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0147312 (1993-11-05) |
| 발명자 / 주소 |
|
| 인용정보 | 피인용 횟수 : 445 인용 특허 : 0 |
An automobile collision avoidance system based on laser radars is disclosed for aiding in avoidance of automobile collisions. The very small beam width, very small angular resolution and the highly directional character of laser radars provide a plurality of advantages as compared with microwave rad
An automobile collision avoidance system based on laser radars is disclosed for aiding in avoidance of automobile collisions. The very small beam width, very small angular resolution and the highly directional character of laser radars provide a plurality of advantages as compared with microwave radars. With two sets of laser radars this system can detect the location, the direction of movement, the speed and the size of all obstacles specifically and precisely. This system includes laser radars with transmitters and receivers, a computer, a warning device and an optional automatic braking device. A steering wheel rotation sensor or a laser gyroscope is utilized to give information of system-equipped vehicle\s directional change. The system will compare the predicted collision time with the minimal allowable time to determine the imminency of a collision, and when determined, provides a warning. An optional automatic braking device is disclosed to be used when the vehicle user fails to respond to a warning. Furthermore, a wheel skidding detecting system based on a discrepancy between the directional change rate predicted by a steering wheel rotation sensor and the actual directional change rate detected by a laser gyroscope is also disclosed. The detection of wheel skidding can be utilized by various vehicle control designs. An averaging device for a steering wheel and a vehicle tilting sensor are used to supplement the steering wheel rotation sensor to improve the accuracy of the automobile collision avoidance system and the wheel skidding detecting system.
A collision avoidance system for a vehicle, comprising: at least two laser radar sets being separately mounted on the vehicle, each laser radar set including at least a laser radar unit, each laser radar unit including a transmitter means for transmitting laser radar signals and a receiver means for
A collision avoidance system for a vehicle, comprising: at least two laser radar sets being separately mounted on the vehicle, each laser radar set including at least a laser radar unit, each laser radar unit including a transmitter means for transmitting laser radar signals and a receiver means for receiving laser radar signals reflected by an obstacle from the transmitted laser radar signals and for generating first electronic signals thereof; an angle message means associated with each laser radar unit for providing second electronic signals representing one of emitting direction and receiving direction of each associated laser radar unit; a steered direction sensing means for sensing direction of movement of the vehicle and generating third electronic signals thereof; a speed sensing means for sensing speed of the vehicle and generating fourth electronic signals thereof; a computer means for receiving and processing the first, the second, the third and the fourth electronic signals; wherein the computer means processes the first electronic signals from each laser radar unit to determine distance and radial component of relative speed between the obstacle and the laser radar unit and generates fifth electronic signals thereof; wherein the computer means processes the second and the fifth electronic signals and, based on any discrepancy of the second and the fifth electronic signals between different laser radar units, the computer determines direction of movement and speed of the obstacle relative to the vehicle and generates sixth electronic signals thereof; wherein the computer means further processes the second, the third, the fourth, the fifth and the sixth electronic signals to determine an imminent collision between the vehicle and the obstacle and generates electronic signals thereof; and response means connected with the computer means for producing a reaction upon receipt of the imminent collision signals from the computer means.
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