VEHICLE DEVICE FOR MEASURING PROPERTIES OF ROAD SURFACE

PURPOSE:To output the measured data of the titled properties of a road surface with consistency by measuring and controlling the measuring intervals of a rut hollow measuring means, a crack measuring means and a longitudinal form measuring means respectively based on a signal from a single range finder which doubles as a running speedometer. CONSTITUTION:The rut hollow measuring means is composed of a CCD camera 6 and a laser oscillator and an electric charge distribution in a matrix shape which is obtained by exposing integrally extending for a prescribed period of time and picking up based on the signal from the range finder 8 which doubles as the speedometer is scanned along a bumpy direction to extract a transverse profile. On the other hand, the longitudinal form measuring means is composed of three optical displacement gages 7a, 7b and 7c arranged at the equal intervals on a base 10 and measures the distance to the road surface from the base 10 at three points at the same time in order every the prescribed time corresponding to the range finder 8 to calculate the longitudinal form. Further, a slit camera 2 picks up road surface information continuously with a film feed speed according to a vehicle speed based on the signal from the range finder 8 with the crack measuring means. Then, these data or the like which are collected and recorded with a measuring vehicle 1 are integrated for every section with a general purpose computer.