公开(公告)号：US5206698A

公开(公告)日：1993-04-27

申请号：US416652

申请日：1989-10-03

申请人： Christian Werner ,  Jurgen Streicher ,  Wilhelm Krichbaumer ,  Hartmut Herrmann ,  Ulrich Oppel ,  Eberhard Gelbke ,  Christoph Munkel ,  Uwe F. W. Berghaus

发明人： Christian Werner ,  Jurgen Streicher ,  Wilhelm Krichbaumer ,  Hartmut Herrmann ,  Ulrich Oppel ,  Eberhard Gelbke ,  Christoph Munkel ,  Uwe F. W. Berghaus

IPC分类号： G01S7/499 ,  G01S17/95

CPC分类号： G01S7/499 ,  G01S17/95

摘要： The lidar arrangement (1) has a transmitter (3) for linearly polarized radiation (12), a receiver (5) with a first receiving device which measures intensity of the backscattered radiation (15) coinciding approximately with the transmitted radiation cone (12) in a polarization plane of the cone and in a perpendicular polarization plane, wherein the receiver further includes a second receiving device which measures the intensity of backscattered radiation (17) outside the transmitted cone (12), the outer backscattered radiation has the shape of a conical shell which surrounds the backscattered conical shell of the first mentioned backscattered radiation (15) and of the transmitted cone (12); the received separate radiation cones (15 and 17) are split in a polarization analyzing optical element into two mutually perpendicular partial light beams, each consisting of an inner partial beam portion (15a, 15b) and an outer partial beam portion (17a and 17b), the inner and outer partial beam portions are separately detected and the resulting output signals are amplified by an amplification factor which depends on the distance of the lidar from a visibility obstacle, the distance-corrected amplified signals are evaluated in a signal processing unit to distinguish between different kinds of the visibility obstacle, and the evaluated obstacle such as fog, rain, snow or solid obstacle and a distance thereof are indicated on corresponding indicators.

摘要翻译： 激光雷达装置（1）具有用于线性偏振辐射（12）的发射器（3），具有第一接收装置的接收器（5），该第一接收装置测量大致与透射辐射锥体（12）重合的反向散射辐射（15）的强度， 在所述锥体的偏振平面中并且在垂直偏振平面中，其中所述接收器还包括第二接收装置，所述第二接收装置测量所述透射锥体（12）外部的反向散射辐射（17）的强度，所述外部反向散射辐射具有 围绕第一提到的背散射辐射（15）和透射锥体（12）的背散射锥形壳体的圆锥形壳体; 所接收的单独的辐射锥体（15和17）在偏振分析光学元件中分成两个相互垂直的部分光束，每个部分光束由内部分光束部分（15a，15b）和外部部分光束部分（17a和17b）组成， ，分别检测内部和外部部分光束部分，并且所得到的输出信号被取决于激光雷达与可见度障碍物的距离的放大因子放大，经过距离校正的放大信号在信号处理单元中被评估以区分 在不同种类的可见性障碍物之间，以及诸如雾，雨，雪或固体障碍物及其距离的评估障碍物在相应的指示器上指示。