FEASIBILITY STUDY FOR AN IMPROVED ACOUSTIC PROBE FOR ROAD ROUGHNESS PROFILING

A feasibility study has been made of four alternative electro-acoustic sensor concepts for application to a non-contact acoustic road roughness profilometer. The concepts examined were, 1) a single-frequency phase detecting system (already partially developed), 2) a two-frequency phase detection system) 3) an echo-ranging system, and 4) an FM-ranging system. The study was primarily a paper investigation with some testing of critical circuits. Primarily based on its simplicity, the echo-ranging concept was indicated as the best one for further exploration. Some of the constraints and performance requirements on acoustic sensor systems are discussed in the report. A method of circumventing some enviromental problems is suggested. (FHWA)

  • Corporate Authors:

    Applied Research Laboratory

    P.O. Box 30
    State College, PA  United States  16801-0030

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Lawther, J M
  • Publication Date: 1981-7

Media Info

  • Pagination: 90 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00341309
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-80-171 Final Rpt., FCP 39B2 024
  • Contract Numbers: P.O. 9-3-0010
  • Files: TRIS, USDOT
  • Created Date: Dec 22 1981 12:00AM