This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
General Motors Water Depth Measuring System
Annotation ability available
Sector:
Language:
English
Abstract
A water depth measuring system has been developed to allow routine and efficient determination of water depths on road surfaces used for tire traction testing.
The system consists of a multi-probe transducer unit (which attaches to the front bumper of most standard automobiles) and an in-car electronics package with direct digital and analog readout capabilities. Water depth measurements are taken at one foot (305 mm) intervals at vehicle speeds from two to five miles per hour (3.2 to 8.0 km/hr). Either individual or accumulated average water depths can be digitally displayed to the driver/operator.
A system of this type will be useful to tire traction test groups by 1) allowing individual test water depths to be measured and adjusted to a desired level prior to traction testing, 2) documenting the effects of independent variables (wind speed, direction, water pressure, etc.) on test surface water depth, and/or 3) allowing limited adjustments in test data based on actual test water depths and known water depth sensitivities.
Recommended Content
Authors
Citation
Allen, C. and Willett, R., "General Motors Water Depth Measuring System," SAE Technical Paper 780198, 1978, https://doi.org/10.4271/780198.Also In
References
- Davisson J. A. “Basic Test Methods for Evaluating Tire Traction” SAE Transactions 77 1968 paper 680136
- Goodenow G. L. Kolhoff T. R. Smithson F. D. “Tire/Road Friction Measuring System - A Second Generation” SAE Paper 680137 1968
- Dugoff H. Brown B. J. “Measurement of Tire Shear Forces” SAE Paper 700092 1970
- Ervin R. D. “Measurement of the Longitudinal and Lateral Traction Properties of Truck Tires” Conference on Braking of Road Vehicles March 23-25 1976 Loughborough. London Institution of Mechanical Engineers 1976 93 100
- “1977 SAE Handbook, Part 2” 29.04 SAE J345a Society of Automotive Engineers, Incorporated Warrendale, PA
- “Standard Test Method of Skid Resistance of Paved Surfaces Using a Full Scale Tire” ASTM E274-77 “1977 Annual Book of ASTM Standards, Part 15” 965 970 AmericanSociety for Testing and Materials Philadelphia, PA
- Veith A. G. Pottinger M. G. “Tire Wet Traction: Operational Severity and Its Influence on Performance” “The Physics of Tire Traction, Theory, and Experiment” Hays D. F. Browne, A. L. Plenum Press New York 1974 5 24
- Yeager R. W. “Tire Hydroplaning” Testing, Analysis, and Design” “The Physics of Tire Traction, Theory and Experiment” Hays D. F. Browne, A. L. Plenum Press New York 1974 25 63
- Staughton G. C. Williams T. “Tyre Performance in Wet Surface Conditions” Road Research Laboratory, Ministry of Transport, RRL Report LR-355 1970
- Nordstrom O. “The Effect of the Depth of Water Films on Road Friction” P.I.A.R.C. - Technical Committee on Slipperiness
- Gengenbach W. “The Effect on Wet Pavement on The Performance of Automobile Tires” July 1967