Title:
ROAD SURFACE ROUGHNESS MEASURING SYSTEM
Document Type and Number:
Japanese Patent JP3852893
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a road surface roughness measuring system in which a measuring circle on a road surface for measuring the coefficient of kinetic friction is divided into a plurality of sections and roughness is measured in each direction at the same section as the measuring position of the coefficient of kinetic friction.
SOLUTION: A frame 32 having a plurality of legs 31 being set on a road surface G is provided and a rotary shaft 45 extending vertically is provided on the frame 32. The rotary shaft 45 is provided with a rotary encoder 44 and a rotary plate 50, respectively, at the upper and lower ends thereof. Furthermore, a geared motor 39 for driving the rotary shaft 45 through gears 41, 41a is provided and a laser displacement gauge 51 is fixed to the rotary plate 50. The laser displacement gauge 51 is disposed to measure the displacement along a coefficient of kinetic friction measurement circle of a rotary coefficient of kinetic friction measuring nit when the rotary plate 50 turns. The measurement circle is divided into a plurality of sections and pavement roughness is calculated for every section based on the signals from the laser displacement gauge 51 and the rotary encoder 44.
Inventors:
Yuya Abe
Toshio Sawa
Atsushi Kasahara
Toshio Sawa
Atsushi Kasahara
Application Number:
JP30207798A
Publication Date:
December 06, 2006
Filing Date:
October 23, 1998
Export Citation:
Assignee:
Nihon Sangyo Co., Ltd.
International Classes:
G01B11/30; G01B21/00; G01N19/02; (IPC1-7): G01B11/30; G01B21/00; G01N19/02
Domestic Patent References:
| JP3010062B2 | ||||
| JP63100318A | ||||
| JP1197606A | ||||
| JP5087561A |
Attorney, Agent or Firm:
Toshitada Takahashi
Toshikuni Takahashi
Toshikuni Takahashi
Previous Patent: SOLUTION HEAT EXCHANGER FOR ABSORPTION REFRIGERATING MACHINE
Next Patent: PRODUCTION OF VINYL CHLORIDE POLYMER
Next Patent: PRODUCTION OF VINYL CHLORIDE POLYMER