U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Calibration Procedures for Seismic and Deflection-Based Devices

File Language:
English


Details

  • Creators:
  • Corporate Creators:
    University of Texas at El Paso. Center for Highway Materials Research
  • Corporate Contributors:
    Texas Department of Transportation
  • Subject/TRT Terms:
  • Publication/ Report Number:
    TX-98-2984-2F, Research Report 2984-2F
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Edition:
    Final Report 9/96 8/98
  • Corporate Publisher:
    Texas. Department of Transportation
  • Abstract:
    The Texas Department of Transportation (TxDOT) has acquired fifteen Falling Weight Deflectometers (FWDs), one Seismic Pavement Analyzer (SPA), and five Portable Seismic Pavement Analyzers (PSPAs) for evaluating the structural integrity of pavements. These nondestructive testing devices use different types of sensors for measuring deflection, deformation and load with time. The accuracy and precision levels of these devices reduce over the years due to wear and tear of the testing devices. Thus, it is essential to develop calibration procedures for these sensors. The primary function of the FWD device is to measure a deflection basin due to a load imparted to the pavement. Velocity transducers (a.k.a. geophones) are used to determine the deflection and load cells are utilized to measure the applied load. The SPA uses several accelerometers and geophones to measure the propagation of waves and deformation of pavements due to imparted loads. Load cells are used to measure the loads applied to the pavement. The PSPA only uses accelerometers to measure wave propagation patterns. Calibration procedures for three different sensors: a) accelerometers, b) geophones, and c) load cells, which are essential for accurate and precise structural evaluation of pavements, have been developed as part of this study. The unique features of the proposed procedures are that: 1) each sensor is calibrated in place as a system, 2) none of the devices have to be disassembled for calibration, and 3) any desired frequency range and amplitude can be conveniently reproduced.
  • Format:
    PDF
  • Funding:
    7-2984
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:83fad418bed424909f2d40a85696be844f11585d1db78423b003f64ed9fdf025b56d61673872ed3e0b912796e68784fd34407da68a0a81b487f1d0f8fc607f75
  • Download URL:
  • File Type:
    Filetype[PDF - 5.25 MB ]
PREVIOUS
File Language:
English
ON THIS PAGE
Details
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP