DEVELOPMENT OF A PROXIMITY DEVICE. PHASE 1. FEASIBILITY STUDY

A wide range of technologies were reviewed for a proximity device that can prevent damage to gas pipelines by backhoes. The MIDDARS was selected based on the selection criteria that the technique must reliably respond to gas pipes and not to metallic debris and that the system can operate unattended completely mounted on the backhoe. The MIDDARS (Magnetic Impulse Detection Discrimination and Ranging System) uses a pulsed magnetic field to induce eddy currents on nearby conducting objects, such as gas pipes. Laboratory tests have demonstrated that by observing the decay of the rescattered fields, the presence of pipeline can be easily discerned over the returns from tin cans or various soils. The excitation and sensor coils are mounted in a modified backhoe bucket. Simple signal processing circuits are positioned on the backhoe to provide an indication to stop the operation of the backhoe before it can damage a pipeline.

  • Corporate Authors:

    IIT Research Institute

    10 West 35th Street
    Chicago, IL  United States  60616
  • Authors:
    • BRIDGES, J E
    • Sutkowski
  • Publication Date: 1982-11

Media Info

  • Pagination: 101 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00396730
  • Record Type: Publication
  • Report/Paper Numbers: 11TRI-EQ8359-FR, GRI-81/0189
  • Files: TRIS
  • Created Date: Feb 28 1986 12:00AM