Shaw David C.-H. (3312 E. Mandeville Pl. Orange CA 92667) Shaw Judy Z.-Z (3312 E. Mandeville Pl. Orange CA 92667)
인용정보
피인용 횟수 :
146인용 특허 :
0
초록▼
An automobile collision avoidance system based on laser radars 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
An automobile collision avoidance system based on laser radars 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. When the system determines that a situation likely to result in an accident exists, it 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, including designs to adjust rear wheel steered angle in a four wheel steering vehicle, to alleviate or correct the wheel skidding. Designs to decelerate the engine or to adjust the transmission to lower gears are also disclosed to alleviate wheel skidding.
대표청구항▼
A collision avoidance system for a roadway vehicle comprising: at least one laser radar unit being mounted on at least one of the vehicle\s four sides, including the front side, rear side, right side or left side, wherein each laser radar unit includes: a transmitter means for transmitting laser rad
A collision avoidance system for a roadway vehicle comprising: at least one laser radar unit being mounted on at least one of the vehicle\s four sides, including the front side, rear side, right side or left side, wherein each laser radar unit includes: a transmitter means for transmitting laser radar signals; a highly directional receiver means for receiving reflected laser radar signals by an obstacle from the said transmitted laser radar signals, and generating a first electronic signal thereof; means for processing said first electronic signal to determine the distance and relative speed in radial direction of said detected obstacle as relative to said vehicle, and generating a second electronic signal representing said detected distance and said detected relative speed thereof; a steering wheel rotation sensor for determining the degree of steering angle and generating a third electronic signal thereof; an outside condition input means with a plurality of selectors, including a road condition selector, a day or night light selector, and a driver\s condition selector, wherein the selectors can be either manually selected by the vehicle user or automatically selected by branch circuits from the windshield wiper and the headlight, to match the ongoing road condition, light condition and driver\s condition respectively, and the selectors can generate fourth, fifth and sixth electronic signals representing the ongoing road condition, light condition and driver\s condition respectively; a speed sensor functionally connected with a speedometer, wherein the speed sensor can generate a seventh electronic signal for the system-equipped vehicle\s speed; a computer receiving input information from the first, second, third, fourth, fifth, sixth and seventh electronic signals, wherein the computer can process the received information and determine when a collision is imminent; and alarm means functionally connected to the computer for producing an alarm upon receipt of a signal from the computer indicating a determination by the computer that a collision is imminent.
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