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Clamped magnetic flux sensor and using method thereof

A magnetic flux sensor, clamping technology, applied in the direction of the magnitude/direction of the magnetic field, can solve the problems of wire damage, troublesome operation, etc., and achieve the effect of saving time, speeding up and saving investment

Pending Publication Date: 2019-05-14
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This on-site magnetic flux sensor still has a shortcoming. It must be fabricated for each cable that needs to measure the cable force. Generally, the sensor remains on the structure after the test. Although it can be dismantled, it will cause damage to The damage of the lead wire, and the operation is troublesome

Method used

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  • Clamped magnetic flux sensor and using method thereof
  • Clamped magnetic flux sensor and using method thereof
  • Clamped magnetic flux sensor and using method thereof

Examples

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Embodiment 1

[0030] The steel cable 3 to be tested in this example is a cable with parallel steel wires inside, which is a cable in an existing cable-stayed bridge, and the outer diameter of the cable is 20mm. The clip-on magnetic flux sensor is in the shape of a circular sleeve in working condition, see figure 1 and Figure 8 , consisting of matching lower split body 1 and upper split body 2, there is a temperature sensor inside, when the cable force is detected, the lower split body 1 and upper split body 2 fit closely, and the steel cable 3 is surrounded to the middle. Lower body 1 and upper body 2 have the same internal structure, see figure 2 and image 3 , mainly including the inner sleeve body 4, the outer sleeve piece 8, the excitation line segment 7 and the induction line segment 5, and the filling The anti-corrosion sealing material 11 of the internal space, the center of the rotating shaft 10 of the clamping pliers 6 is located 5mm outside the two split bodies. The inner di...

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Abstract

The invention discloses a magnetic flux sensor, in particular to a clamped magnetic flux sensor and a using method thereof. The magnetic flux sensor is used for detecting a tensile force of an exposedsteel cable in an existing structure; the main body of the magnetic flux sensor is divided into two parts of an upper split body and a lower split body, which are made indoors and both ends of whichare equipped with clamping pincers, and the calibration is completed; in the field, it is only required to clamp the cable in the middle, and put the joint faces of the two split bodies together, so that the wire segments in the two split bodies are connected on the outer end binding faces accordingly, thereby forming excitation coils and an induction coil; wherein the two symmetrical excitation coils is at both ends and the induction coil is at the middle part. Compared with the conventional magnetic flux sensor and the magnetic flux sensor fabricated in the field, the clamped magnetic flux sensor is convenient and quick to operate, saves time and money, and is economical and practical.

Description

technical field [0001] The invention relates to a magnetic flux sensor, in particular to a clip-on magnetic flux sensor and its application method. Background technique [0002] In recent decades, with the application of cable structures more and more widely, the design calculation theory of suspension cable structures has also been perfected and developed. The cable force control in the construction process and in the existing structure is an important link related to the internal force and state of the structure. The deterioration of structural materials, defects or structural damage caused by accidents will cause the redistribution of internal forces of various components, especially cables. Therefore, how to determine the cable tension of the structure during construction and use has become a major problem for engineering designers. [0003] Commonly used conventional cable force testing methods are pressure sensor method and frequency method. The pressure sensor has ...

Claims

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Application Information

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IPC IPC(8): G01R33/02
Inventor 魏建东郑元勋张天航
Owner ZHENGZHOU UNIV
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