An auxiliary device for internal pipeline stress detection based on Barkhausen effect

Abstract

For the requirements of integrated internal detection of the pipeline stress concentration and metal damage, the internal stress detection technology based on continuous Barkhausen effect was studied, and an auxiliary device for internal stress detection was developed. The auxiliary device for internal stress detection based on continuous Barkhausen effect comprises a dynamic excitation module, a signal detection module, a data acquisition and processing module, and a stimulation module. The dynamic acquisition of continuous Barkhausen noise signal and magnetic flux leakage signal within a constrained space was achieved by simulating the operation conditions of the inner detector and the pipeline. Application of Barkhausen stress detection method to an X60 steel pipeline verified the feasibility of its application to stress detection of long-distance pipeline, which could provide guidance to the development of inner detection devices integrating pipeline stress and metal damage.

Keywords

• internal pipeline inspection
• magnetic flux leakage testing (mfl)
• continuous barkhausen effect
• stress concentration