MEASURING INSTRUMENT OF COEFFICIENT OF DYNAMIC FRICTION

摘要

PROBLEM TO BE SOLVED: To provide a measuring instrument of the coefficient of dynamic friction which is fixed on a road surface to be measured to enable automatic measurement, made compact as a whole to enable the measurement at a narrow place, having sufficient rigidity in its friction measuring part, having a structure receiving no effect of dust and acquiring measured data of high precision. SOLUTION: This measuring instrument of the coefficient of dynamic friction has: the base frame (1) fixed and installed on the road surface; and the friction measuring part (A) composed of wheels (2) and a measuring road surface (G), and is constituted of: an axle (3) having the wheels (2) fixed thereto; an axle support frame (4) for pivoting the axle (3) in a freely rotatable manner; a first drive means (5) for driving the axle support frame (4) through a first drive force transmission means (6); a second drive means (7) for driving the wheels (2) through a second drive force transmission means (8) having a torque sensor (St) provided on the way thereof; a vertical load applying means (9) for applying vertical load to the wheels (2); and a control means (B) for operating the coefficient of dynamic friction of the friction measuring part (A). The control means (B) is constituted so as to operate the coefficient of dynamic friction on the basis of the output signal from the torque sensor (St). COPYRIGHT: (C)2005,JPO&NCIPI