The present invention makes it possible to acquire the gradient of a road surface without taking displacement of a spring top into consideration. According to the present invention, an irradiation device emits parallel rays (B1, B2). The parallel rays (B1, B2) hit the road surface and marks (Pc1, Pc2) are formed; an imaging target including the marks (Pc1, Pc2) is imaged by an imaging device, and a captured image (J) is obtained. The vertical distance (e) between mark images (Mc1, Mc2) corresponding to the marks (Pc1, Pc2) is detected. If the distance (e) is large, it is possible to acquire the gradient (gamma) as a larger value than if the distance (e) is small. In this manner, the gradient of the road surface is acquired on the basis of the distance between the two mark images, but the relative positional relationship between the two mark images is the same regardless of whether there are variations in the height of a spring top to which the irradiation device and imaging device are provided, as long as the gradient of the road surface is the same. For this reason, the gradient of the road surface can be acquired without taking displacement of the spring top into consideration.
Road surface condition acquisition device and suspension system
2015-04-22
Patent
Elektronische Ressource
Englisch
IPC: | G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G01C Messen von Entfernungen, Höhen, Neigungen oder Richtungen , MEASURING DISTANCES, LEVELS OR BEARINGS / G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL |
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