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Nondestructive Evaluation

 

Anchor Rod Inspection Using Magnetostrictive Sensor Technology

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  image of high-voltage electric transmission power lines
 

image of one good anchor rod and one corroded one

  image of graph showing inspection data comparing a good rod and a bad one
 

High-voltage electric transmission power lines are supported by guy wires attached to anchor rods. The MsS system provides inspection data of the entire anchor rod taken from a point that rests above ground, eliminating the need for excavation. The sample rod above illustrates one good rod and one corroded rod.

Many thousands of miles of high-voltage electric transmission power lines are supported by guy wires attached to anchor rods. The anchor rods range from 0.5 to 1.5 inches in diameter and from 7 to 10 feet in length and are embedded in soil or concrete. These anchor rods are subject to corrosion, and when the corrosion progresses to unsafe levels, catastrophic failure of the transmission power lines could occur.

 

Application of MsS® Technology

Southwest Research Institute (SwRI) scientists successfully applied the magnetostrictive sensor (MsS) technology to anchor rods to detect underground corrosion. Using longitudinal guided waves at 32 kHz, hundreds of anchor rods in a variety of operating environments across the United States were inspected, successfully proving that the MsS system can assess degrees of corrosion.

 

The MsS system provides inspection data of the entire anchor rod taken from a point that rests above ground, eliminating the need for excavation. The sample data shown illustrates one good rod and one corroded rod.

 

For more information about our nondestructive evaluation (NDE) capabilities and magnetostrictive sensor technology, or how you can contract with SwRI, please contact Sergey A. Vinogradov, Ph.D., at sviogradov@swri.org or call (210) 522-3342.

 

ndesensors.swri.org

  

Contact Information

Sergey A. Vinogradov, Ph.D.

Nondestructive Evaluation

(210) 522-3342

svinogradov@swri.org

ndesensors.swri.org

Related Terminology

bridge cable inspection

corrosion

cracks

guided wave

guided ultrasonics

horizontally polarized shear waves

longitudinal waves

magnetostrictive sensor technology

MsS

nondestructive evaluation

plate inspection

pipe wall thinning

steel pipe inspection

torsional waves

| Sensor Systems and Nondestructive Evaluation (NDE) Technology Department | Mechanical Engineering Division | SwRI Home |

Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 10 technical divisions.

August 07, 2014