Inverse magnetostrictive effect-based suspender tension sensor and tension measuring method thereof

Abstract

An inverse magnetostrictive effect-based suspender tension sensor consists of two clamps, a connecting rod, two excitation coils and a detecting coil; a clamping part is formed at one end of each clamp, a connecting part is formed at the other end of each clamp, and the clamps are fixedly connected with a suspender to be measured by the clamping parts and are connected with the connecting rod by the connecting parts; the excitation coils are wound between the connecting parts and the clamping parts of the clamps; the detecting coil is wound between the two connecting parts on the connecting rod; the connecting rod forms a yoke, the clamps form magnetic poles, and the yoke, the two magnetic poles and the suspender to be measured between the two magnetic poles form a closed magnet loop. The inverse magnetostrictive effect-based suspender tension sensor has the beneficial technical effects of greatly simplifying the mounting process of the tension sensor, widening the application environment of a tensile stress sensor and providing a new means for the stress monitoring of the suspender.

Description

technical field [0001] The invention relates to an internal stress measurement technology for steel members of cables and rods, in particular to a suspender tension sensor based on an inverse magnetostrictive effect and a tension measurement method thereof. Background technique [0002] The suspenders in tie-bar arch bridges can generally be made into rigid suspenders or flexible suspenders. Rigid boom applications are as follows: [0003] The boom is an axial tension member. It is easy to crack when it is made of reinforced concrete members, and the cross-sectional size is also large. Therefore, prestressed members are often used. By applying precompressive stress to the boom, it can avoid the boom under load Cracking, so called a rigid boom. The flexible suspender is made of prestressed high-strength steel wire bundle or steel strand, which only bears the action of tension and cannot be compressed. It is more reasonable and convenient to use when the bridge is wide, the ...

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Problems solved by technology

[0006] At present, the research and application of stress measurement based on inverse magnetostriction for cable-strut steel members is still in its infancy. For the suspender, the common measurement method is: use the suspender to be tested as the iron core, and set the induction coil outside the iron core. and the excitation coil, the tested boom is not only the iron core of the excitation coil but also the iron core of the induction coil. This measurement method needs to connect the coil to the outside of the tested boom, so in the prior art, either in the production or installation of the boom The coil sleeve is put on the boom in advance, or the coil can only be wound on site. The installation of the measuring device is very troublesome, which greatly limits its application and measurement accuracy.

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