AN APPARATUS FOR DETERMINING THE ACTUAL FOOTPRINT AREA OF TIRES

AN APPARATUS FOR MEASURING THE ACTUAL CONTACT AREA OF TIRES REGARDLESS OF THEIR TREAD DESIGN IS DESCRIBED. THE PROCEDURE IS BOTH RAPID AND ACCURATE. THE METHOD UTILIZES A BANK OF LIGHTS, AN OPAL GLASS PLATE, A SIMPLE LIGHT FOCUSING SYSTEM, AND A SILICON SOLAR CELL WHICH LINEARLY TRANSFORMS THE INCIDENT LIGHT TO AN ELECTRICAL CURRENT. THE REDUCTION IN CURRENT IS THE MEASURE OF THE TRUE CONTACT AREA OF THE TIRE. /AUTHOR/

• Supplemental Notes:
  • Vol 10, No 2, PP 20-22, 63
• Authors:
  • Pizer, R S
  • Spinner, S
• Publication Date: 1970-2

Media Info

• Serial:
  • Materials Research and Standards
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Measuring instruments; Optical measurement; Tires
• Uncontrolled Terms: Contact area
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00223123
• Record Type: Publication
• Files: TRIS
• Created Date: May 4 1970 12:00AM