ACOUSTIC CRACK DETECTOR (ACD). OPERATOR'S MANUAL

The acoustic crack detector (ACD) is a special purpose, portable, ultrasonic system designed to locate fatigue cracks in steel bridge members. Its operation depends upon injecting short bursts of energy (high frequency vibratory waves) into the steel member, and detecting reflections from discontinuities such as may be produced by a crack. This information is automatically translated into a numerical readout which displays to the operator the distance to the discontinuity. /FHWA/

• Corporate Authors:

  Federal Highway Administration

  Office of Research and Development, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Publication Date: 1975-1

Media Info

• Pagination: 124 p.

Subject/Index Terms

• TRT Terms: Acoustic equipment; Cracking; Detection and identification; Detectors; Fatigue (Mechanics); High frequency; Maintenance practices; Manuals; Measurement; Metal bridges; Reflectivity; Steel bridges; Ultrasonic tests
• Uncontrolled Terms: Operation and maintenance; Steel beams
• Subject Areas: Geotechnology; Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 00179463
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA-RD-75-502
• Files: TRIS, USDOT
• Created Date: Aug 27 1978 12:00AM