公开(公告)号：US06127965A

公开(公告)日：2000-10-03

申请号：US122479

申请日：1998-07-23

申请人： James C. McDade ,  Robert E. Stone ,  Eric P. Bohley ,  Roger J. Schlichtig

发明人： James C. McDade ,  Robert E. Stone ,  Eric P. Bohley ,  Roger J. Schlichtig

IPC分类号： G01S7/295 ,  G01S7/02 ,  G01S7/41 ,  G01S13/06 ,  G01S13/32 ,  G01S13/34 ,  G01S13/93 ,  G01S13/00 ,  G01S13/50

CPC分类号： G01S13/931 ,  G01S13/325 ,  G01S13/34 ,  G01S2013/9332 ,  G01S2013/9385 ,  G01S7/415

摘要： A method and apparatus for detecting the presence of objects in a vehicle operator's blind spots. The apparatus comprises a side-facing Doppler radar system using continuous wave (CW) transmission with frequency modulation (FM) operation from a frequency modulation switching technique. The radar system determines the presence, range and closing rate of detected targets. The radar system detects targets even when operated in adverse weather conditions and will not generate false warnings due to rain clutter caused by wet roads and other wet surroundings. The radar system uses ranging techniques to reject false targets that are detected outside of a predetermined target detection zone. In accordance with the present invention, the radar system indicates that a target is detected if and only if any part of the target is within the detection zone and it: (1) remains in front of the antenna for at least TH1 seconds; (2) is at a range between Range.sub.min and Range.sub.max ; and (3) is moving faster than Closing-Speed.sub.min relative to the antenna. By rejecting targets that are closer than Range.sub.min feet to the antenna, false alarms due to rain clutter are dramatically reduced. Also, by rejecting targets that are further than Range.sub.max feet from the antenna, the radar system reduces false alarms caused by wet foliage and other wet "non-road" surroundings. In one embodiment, the radar system uses a patch array antenna oriented into a diamond-shape configuration to effectively create a natural linear amplitude taper that aids in rejecting clutter caused by wet road surfaces.

摘要翻译： 一种用于检测车辆驾驶员盲点中的物体的存在的方法和装置。 该装置包括使用来自频率调制切换技术的具有频率调制（FM）操作的连续波（CW）传输的侧面多普勒雷达系统。 雷达系统确定检测到的目标的存在，范围和关闭率。 雷达系统即使在恶劣天气条件下操作也能检测目标，不会由于潮湿的道路和其他潮湿环境造成的雨淋而造成误报。 雷达系统使用测距技术来拒绝在预定目标检测区域外检测到的伪目标。 根据本发明，雷达系统指示目标是否被检测到并且只有目标的任何部分在检测区内，并且：（1）保持在天线前面至少TH1秒; （2）在Rangemin和Rangemax之间的范围内; 和（3）相对于天线相对于Closing-Speedmin的移动速度更快。 通过拒绝距离天线的天线更靠近的目标，由于雨水杂乱而引起的误报显着减少。 另外，雷达系统通过拒绝天线以外的目标，减少由湿叶和其他潮湿“非道路”环境引起的假警报。 在一个实施例中，雷达系统使用定向成菱形形状配置的贴片阵列天线，以有效地产生有助于拒绝由湿路面引起的杂波的自然线性振幅锥度。