Probe for Defect Detection of Underwater Metal Structures Based on AC Electromagnetic Field

Abstract

The invention discloses an underwater metal structure defect detecting probe based on an alternating current electromagnetic field. The underwater metal structure defect detecting probe mainly comprises a gland, a bottom cover, a cylinder, a seal joint, an O ring, a detection coil, an excitation circuit, a conditioning circuit, a U-shaped magnetic core, an excitation coil, a seal gasket and a top cover, wherein the detection coil is mounted in a central groove of the bottom cover and connected with the conditioning circuit; the conditioning circuit is mounted in a clamping groove I in the cylinder; the excitation circuit is mounted in a clamping groove II in the cylinder and connected with the excitation coil; the bottom cover is tightly pressed to the bottom of the cylinder by the gland; water isolation space is formed among the bottom cover, the O ring and the cylinder, and a self-sealing effect is realized. The underwater metal structure defect detecting probe has the benefits as follows: the probe for detecting defects of an underwater metal structure is designed by the aid of an alternating current electromagnetic field detection technology, the problem about underwater sealing and the problems of signal attenuation and the like can be solved effectively, and the defects of the underwater metal structure can be detected.

Description

technical field [0001] The invention relates to a defect detection system, in particular to an underwater metal structure defect detection system based on an AC electromagnetic field. Background technique [0002] With the rapid development of the offshore oil industry, many offshore platforms and submarine pipelines have entered the aging stage. Due to the action of environmental loads such as ocean waves, underwater metal structures are prone to defects such as corrosion, fracture, and fatigue. Timely detection of defects in underwater metal structures is of great significance for ensuring the safe operation of offshore oil equipment. Traditional detection techniques are difficult to detect defects in metal structures under complex sea conditions. The invention uses the AC electromagnetic field detection technology to design a probe for detecting defects of underwater metal structures, which can effectively solve problems such as underwater sealing and signal attenuation...

AI Technical Summary

Problems solved by technology

Traditional detection technology is difficult to use in the detection of defects in metal structures under complex sea conditions

The invention uses the AC electromagnetic field detection technology to design a probe for detecting defects in underwater metal structures, which can effectively solve problems such as underwater sealing and signal attenuation, and has important engineering application value

Images