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Low frequency ultrasonic guided wave detection

SOHIC开裂检测 Test Item Low frequency ultrasonic guided wave detection
Purpose Analy corrosion resistance of the pipeline
Test Range Buried pipeline

The ultrasonic guided wave detection technique uses the low frequency torsinal wave or longitudinal wave to carry on the long range detection to the pipeline, the pipeline, including the long distance detection under the condition of the underground pipe.
Low frequency guided wavelength range ultrasonic detection method is used for the rapid detection of pipeline in service state, the internal and external wall corrosion can be detected, and it can also detect planar defects in the pipe section.

   Detection principle and judging criteria

Evaluation of corrosion test for buried pipeline。 Guided waves in detection, the probe to the applied excitation signal, the change of the coil around magnetic field, due to the magnetostrictive effect, the guided wave propagating along the pipe axial; in guided wave propagation process, defect is encountered, a part of the wave will reflected back, the other part continue to propagate, reflected wave guide the inverse magnetostrictive effect, induction electrical signals generated in the coil, the acquisition and processing and analysis, you can realize pipeline detection。 Main equipment has low frequency ultrasonic guided wave。

   Test instruments and equipments

Low frequency ultrasonic guided wave function: it can be used to detect the changes of the cross section of the pipe metal component, such as thin wall thickness, weld defect, low frequency ultrasonic guided wave signal along the long distance transmission, the detection is true, the efficiency is high, and it is suitable for high temperature。

   Laboratory

实验室环境

   Service process
Require
───Quick:Customer service reply consultation
 
Apply
───Standard:Fill in the application form, sign the agreement.
 
Testing
───Strictly:Strict compliance with the operating rules for the sample testing
 
Report
───Comply with the reporting procedures and ensure the accuracy of the data.
 
Archive
───Service:Archive customer's samples and contracts

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