A light emitting element and a light receiving element is placed in such a manner that the light axis of a light emitting element constructing a light emitting circuit and the light axis of a light receiving element constructing a light receiving circuit cross each other. The light pathway length R1, R2 of both the light waves are determined in such a manner that the object light, the light waves via the object pathway, are delayed by À/2 in phase from the reflected light, i.e. relative to light waves via the reflected light pathway. A synchronous detector selects signals having the same phase as the object light from receive signals provided from the light receiving circuit. Accordingly, the fog detector can detect the object light without being influenced of the reflected light, which allows a determination processing device to accurately determine the density of fog.
Fog detector and method of placing detector in vehicle
Nebeldetektor und Verfahren zur Anordnung des Detektors in einem Fahrzeug
Détecteur de brouillard et procédé d'installation du détecteur dans un véhicule
2017-01-11
Patent
Electronic Resource
English
IPC: | G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / G01S RADIO DIRECTION-FINDING , Funkpeilung / G01V Geophysik , GEOPHYSICS / G01W METEOROLOGY , Meteorologie |
VEHICLE DETECTOR, ADJUSTMENT METHOD FOR VEHICLE DETECTOR, AND PROGRAM
European Patent Office | 2020
|VEHICLE DETECTOR, ADJUSTMENT METHOD FOR VEHICLE DETECTOR, AND PROGRAM
European Patent Office | 2023
|