ANALOG-TO-DIGITAL SYSTEM

A HEWLETT-PACKARD 2115 ANALOG-TO-DIGITAL CONVERTER FOR USE WITH THE SURFACE DYNAMICS PROFILOMETER IN CONDUCTING PAVEMENT QUALITY TESTS IS DESCRIBED. AFTER A DISCUSSION OF THE A/D PROBLEM, DETAILED DESCRIPTION IS PROVIDED FOR AN INTERFACE AND PATH LOGIC MODULE BUILT BY PROJECT PERSONNEL TO INTERFACE EXTERNAL SIGNS WITH THE 2115, THE A/D AND TAPE WRITE PROGRAMS NECESSARY FOR SYSTEM OPERATIONS, AND THE OPERATING AND DATA VALIDATION PROCEDURES REQUIRED TO USE THE EQUIPMENT. ADDITIONAL DIAGRAMS AND PROGRAM LISTINGS PROVIDE COMPLETE DOCUMENTATION OF THE SYSTEM. THE A/D SYSTEM IS FULLY COMPATIBLE WITH THE SDS 930 USED IN THE INITIAL STAGES OF THE PROJECT ON PAVEMENT ROUGHNESS MEASUREMENT INAUGURATED IN 1963. CURRENT ANALYSIS PROGRAMS THAT RUN ON A CDC 6600 OR IBM 360/50 CAN USE THESE DATA WITHOUT PROGRAM CHANGES. /AUTHOR/

• Supplemental Notes:
  • Res. Rept 73-4, 102PP, 17 FIG, 9 TAB, 7 REF, 3 APP
• Corporate Authors:

  University of Texas, Austin

  Center for Highway Research, 200 West 21st Street
  Austin, TX  United States  78712
• Authors:
  • Walker, R S
  • Hudson, W R
• Publication Date: 1970-4

Subject/Index Terms

• TRT Terms: Analog to digital converters; Computer programs; Computers; Evaluation; Pavement performance; Pavements
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207208
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 7 1970 12:00AM