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公开(公告)号：US3697985A
公开(公告)日：1972-10-10
申请号：US3697985D
申请日：1970-09-23
Applicant: BENDIX CORP
Inventor： FARIS WILLIAM R , HAROKOPUS WILLIAM P
CPC classification number: G01S13/931 , G01S2013/9317 , G01S2013/9332 , G01S2013/9385
Abstract: The invention is directed to a system which provides an audible or visual indication to a motor vehicle operator when another vehicle approaches the rear end of his vehicle in an adjacent lane or when a potentially interferring object is located behind the vehicle when backing up. The system covers the blind spots which are present on the right and left sides of the vehicle because of the inherent inadequacies of rearview mirrors and also the invisible area at the rear of the vehicle. A range measuring doppler radar system has its antenna positioned to cover the area which lies on the two sides and behind a vehicle and which normally is within the well known blind spot. The radar system is squarewave modulated to sequentially produce two frequencies F1 and F2. Reflected signals from a moving target produce two doppler signals fd1 and fd2. The comparison of the relevant phases of the two doppler frequencies gives range information. The leading and lagging relationship of the doppler signals is indicative of whether the target is closing or opening with respect to the radar carrying base vehicle. The system is, therefore, readily made responsive to closing targets or slowly opening targets falling within a dangerously close range as the vehicle proceeds along a roadway. Fixed objects such as poles and signs along the road are also prevented from giving a warning signal by the phase information. When the vehicle is backing up, objects or persons present behind the vehicle are detected and a warning given.
Abstract translation: 本发明涉及一种系统，当另一车辆在相邻车道中接近他的车辆的后端时或者当备用时潜在的干扰物体位于车辆后方时，向机动车辆操作者提供可听或可视指示。 由于后视镜的固有不足以及车辆后方的不可见区域，该系统覆盖存在于车辆右侧和左侧的盲点。
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公开(公告)号：US3701568A
公开(公告)日：1972-10-31
申请号：US3701568D
申请日：1970-09-30
Applicant: BENDIX CORP
Inventor： LEWIS RICHARD L , HICKNER GEORGE B , HAROKOPUS WILLIAM P
CPC classification number: G01S13/92 , B60T8/17633 , B60T8/328 , B60T8/347 , B60T8/72 , B60T8/76 , B60T13/143
Abstract: AN ADAPTIVE BRAKING SYSTEM FOR A VEHICLE IN WHICH DOPPLER RADAR DEVICES ARE USED TO MEASURE WHEEL SPEEDS AND VEHICLE SPEED AND PROVIDE ELECTRICAL SIGNALS PROPORTIONAL THERETO. THESE SIGNALS ARE PROCESSES AND COMBINED TO PROVIDE FURTHER SIGNALS PROPORTIONAL TO WHEEL SLIP, RATE OF CHANGE OF WHEEL SLIP AND VEHICLE ACCELERATION. A SYSTEM FOR DETECTING PEAKS OF VEHICLE ACCELERATION AND TRANSMITTING A SIGNAL INDICATING THE OCCURENCE OF THE SUCH A PEAK MAY ALSO BY INCLUDED. THESE SEVERAL SIGNALS ARE TRANSMITTED TO A PROGRAMMER AND/OR LOGIC ELEMENT. OUTPUTS FROM THE PROGRAMMER AND/OR LOGIC ELEMENT ARE RECEIVED BY BRAKE PRESSURE MODULATORS TO VARY THE PRESSURE APPLIED BY THE OPERATOR THEREBY MAINTAINING MAXIMUM BRAKING TORQUE. A LIMITER CAN BE INCORPORATED TO PREVENT SLIP VALUES BETWEEN THE TIRE AND ROAD SURFACE FROM EXCEEDING SOME PREDETERMINED MAXIMUM.
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