Patent ID: 6862935
Filing Date: 2005-03-08
Classification: G01C

Abstract:
1. A tilt angle measuring apparatus comprising: a plurality of ultrasonic sensors, each of which has a function of transmitting an ultrasonic wave to a road surface and a function of receiving the ultrasonic wave reflected by the road surface; signal processing means that control these ultrasonic sensors and compute a tilt angle of the road surface from signals detected by the ultrasonic sensors; and a case that houses the ultrasonic sensors and the signal processing means, wherein the case includes a case body for housing the ultrasonic sensors and a cover for covering an upper portion of the case body, and the case body is provided with a bottom plate having windows, each of which exposes an ultrasonic wave transmitting/receiving face of each of the ultrasonic sensors, a side plate extending upward from a peripheral edge of the bottom plate and abutting against a bottom surface of the cover, and horn parts, each of which extends downward from the bottom plate so as to surround each of the windows.