Bridge suspender damage and wire breakage detection device based on magnetostriction method

Abstract

The invention discloses a bridge suspender damage and wire breakage detection device based on a magnetostriction method, and the device comprises: a coil assembly mechanism which comprises more than two arc-shaped substrates, wherein all arc-shaped substrates surround the outer side of a suspender to form a fixed substrate structure; a coil unit which comprises an exciting coil and a receiving coil, wherein the exciting coil and the receiving coil are wound on the outer side of the base body structure; a magnetic circuit permanent magnet structure which comprises a yoke, wherein more than onegroup of permanent magnet units are arranged on the yoke, each group of permanent magnet units comprises a saddle piece, a permanent magnet and a clamping piece, and the permanent magnet is connectedwith the yoke and used for generating a uniform magnetic field, the saddle piece is used for connecting the permanent magnet and the clamping piece, and the clamping piece is used for being connectedwith a coil assembling mechanism to form a clamping type fixing structure. The bridge suspender damage and wire breakage detection device has the advantages of the simple and compact structure, simpleand convenient assembly, the wide application range and the like.

Description

technical field [0001] The invention mainly relates to the technical field of bridge engineering, in particular to a bridge suspender damage and broken wire detection device based on a magnetostrictive method. Background technique [0002] Suspenders are the main load-bearing components of long-span bridges such as under-supported arch bridges and suspension bridges. They have been in the open air for a long time, and are affected by external factors, causing serious aging damage to the sheath; Corrosion damage or even fracture of steel wire. At the same time, the fatigue problem of the high-strength steel wire in the boom under repeated vehicle loads has attracted widespread attention. Corrosion will further aggravate the fatigue fracture process of the steel wire and significantly reduce its service life. There have been many bridge safety accidents caused by suspender damage at home and abroad, resulting in bad social impact and heavy economic losses. Therefore, it is n...

AI Technical Summary

Problems solved by technology

[0005] However, the magnetostrictive sensor of the conventional sleeve-type solenoid coil needs to be installed at the free end of the suspension, and then moved to the detection position to fix it

In actual engineering, the two ends of the bridge suspender are anchored and fixed, and there is no free end, which makes it difficult for the sleeve-type induction coil to meet the actual needs

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