DE3930272

The lidar (1) comprises a transmitter (3) for linear-polarized radiation (12), a receiver (5) having a first receiving device which measures the intensity of the back-scattered radiation (15) from the transmitted cone of rays (12) in the polarization plane thereof and perpendicular thereto, and a se...

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Bibliographische Detailangaben
Hauptverfasser:	HERRMANN, HARTMUT, 8031 WOERTHSEE, DE, GELBKE, EBERHARD, 2082 UETERSEN, DE, KRICHBAUMER, WILHELM, 8000 MUENCHEN, DE, BERGHAUS, UWE F.W. DR., 2000 WEDEL, DE, MUENKEL, CHRISTOPH, 2000 HAMBURG, DE, STREICHER, JUERGEN, 8034 GERMERING, DE, WERNER, CHRISTIAN., 8000 MUENCHEN, DE, OPPEL, ULRICH, DR., 8031 WOERTHSEE, DE
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	The lidar (1) comprises a transmitter (3) for linear-polarized radiation (12), a receiver (5) having a first receiving device which measures the intensity of the back-scattered radiation (15) from the transmitted cone of rays (12) in the polarization plane thereof and perpendicular thereto, and a second receiving device which measures the intensity of the back-scattered radiation (17) from an annular spatial region outside the transmitted cone (12), and an evaluating device (7) for evaluating the measured signals in order to determine whether a wall of fog (14) or snow or rain or a solid obstacle to visibility is present at a distance (d) to be measured. The nature of the obstacle and its distance (d) from the lidar (1) are indicated in an indicator (43a, 43b, 43c, 43d, 44). The lidar (1) according to the invention can be incorporated as a distance monitor in a motor vehicle and, in conjunction with a data processing device and a tachometer measuring the speed of the vehicle, can be used to obtain an optimum speed of the vehicle by acting on the drive and/or brake system, depending on the environmental conditions determined from the measured data.