Being the sensor in order as the sensor for road surface state detection is loaded by the rear section of hull side inside the tire house which opposes to the tire of the road surface state detection

摘要

PROBLEM TO BE SOLVED: To measure slipperiness of a road-surface and the concentration of salt remaining on the road surface stably at the same time even under a low- temperature condition, in a road-surface condition detecting sensor and a road- surface condition detecting device using it. ;SOLUTION: A reflective optical sensor 3 is arranged ahead of a car 2, in advancing direction, relative to a tire 6, while a vibration/permeability change detecting part 4 which is a road-surface condition detecting sensor is allocated in a tire house 7. By this, the glossiness of a road-surface LD and a physical phenomenon wherein an object splashed from the road surface LD by rotation of the tire 6 collides or sticks are captured for detecting slipperiness of the road surface. Further, based on the water content sticking to the vibration/ permeability change detecting part 4 and the change amount of permeability, the salt concentration contained in the sticking water is detected.;COPYRIGHT: (C)1999,JPO