Measuring and testing – Surface and cutting edge testing – Roughness
Patent
1975-08-14
1976-10-05
Queisser, Richard C.
Measuring and testing
Surface and cutting edge testing
Roughness
346 8, G01B 528
Patent
active
039837467
ABSTRACT:
This invention detects, indicates and records road surface deviations in the normally-traveled vehicle tracks. Surface deviations detectable range from less than one inch in height to the largest height negotiable by the vehicle carrying the instrument. Final measurements are indicated from a mean surface, and with proper calibration numerical values may be established to give a meaningful quantitative description of the roughness of a given section of road.
Description of the surface roughness is expressed by two linear dimensions: one is the height of the encountered deviation; the other is the distance between major deviations. For analysis of the data obtained, the first dimension, the height of the deviation, is used as recorded, and the second dimension is inverted to give frequency of deviation.
Measurements are made by maintaining a predetermined reference plane with a gyroscope and sensing the carrying vehicle's roll and pitch. The data can be displayed on a dial or recorded on a chart; chart recordings, when properly calibrated, indicate both amplitude and spacing of road surface deviations.
REFERENCES:
patent: 1843959 (1932-02-01), Sperry
patent: 2946644 (1960-07-01), Henry
patent: 3069904 (1962-12-01), Henry
patent: 3151235 (1964-09-01), Greenshields
patent: 3266302 (1966-08-01), Spangler et al.
patent: 3353404 (1967-11-01), Swift
patent: 3459038 (1969-08-01), Swift
patent: 3525257 (1970-08-01), Mays
patent: 3888118 (1975-06-01), Nims
Phillips Ross A.
Thorner Benjamin C.
McConnell David G.
Queisser Richard C.
Roskos Joseph W.
Silverstein M. Howard
The United States of America as represented by the Secretary of
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