Stay cable force measuring device and measuring method therefor

A measuring device and cable technology, applied in the direction of tension measurement, etc., can solve the problems of poor versatility and practicability, difficulty in determining the best working point, measurement error, etc., and achieve the effect of simple structure

Inactive Publication Date: 2017-03-15
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

However, the theory of this method and key technologies such as its magnetic circuit structure, material composition, and the influence of ambient temperature on the measurement results need to be further studied and improved, and different magnetic flux models need to be established for different cable materials. For magnetic materials, its magnetoelectric characteristics and temperature compensation curv

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  • Stay cable force measuring device and measuring method therefor
  • Stay cable force measuring device and measuring method therefor
  • Stay cable force measuring device and measuring method therefor

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Embodiment Construction

[0044] The invention provides a cable force measuring device, which is used to measure the cable force by being installed on the cable to be tested, such as figure 1 As shown, the cable force measuring device includes a rigid fixed support 1 , a hydraulic press 2 , a contact displacement sensor 3 and a measurement control processor 4 . Wherein, the rigid fixed bracket 1 has two bracket fixing parts 10 for being respectively fixed at different positions on the cable 5 to be measured, and the hydraulic machine 2 and the contact displacement sensor 3 are fixedly installed on the two brackets through the rigid fixed bracket 1 . 10 and is located at the side of the line connecting the two bracket fixing parts, and the pressure head of the hydraulic machine 2 and the contact probe of the contact displacement sensor 3 can be located along the middle position of the connecting line of the two bracket fixing parts. expand and contract in the vertical direction, so that the hydraulic ma...

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Abstract

The invention provides a stay cable force measuring device and a measuring method therefor. The device is simple in structure, and no expensive high precision equipment such as sensors is needed; a corresponding relation between cable force of a stay cable and radial elastic stress is adopted by the device, a contact type displacement sensor with guaranteed measurement accuracy is adopted for measuring variation of radial deformation and displacement before and after specified radial pressure is applied on the stay cable, and the cable force of the stay cable is measured via a pre-established function relation model between the cable force and deformation under stress; whether the stay cable is in installation processes or is put into use after installation, the cable force of the stay cable can be measured; based on a measurement principle adopted by the device, measurement precision can be prevented from being affected by interference factors such as span, sag, vibration, environment electromagnetic waves and the like of the stay cable; high measurement precision can be guaranteed, universality can be well ensured, convenience of use and operation is realized, and a new solution is provided for measurement of the cable force of the stay cable which is put into use after installation.

Description

technical field [0001] The invention relates to the technical field of cable stress and safety monitoring, in particular to a cable force measuring device and a measuring method thereof. Background technique [0002] Cable force measurement plays an important role in modern building safety inspection and monitoring. At present, four methods are generally used for cable force measurement at home and abroad: (1) pressure gauge measurement; (2) pressure sensor measurement; (3) frequency measurement method; (4) magnetoelastic effect method. [0003] The pressure gauge method is simple and easy to implement. It is a practical method to control the cable force during construction. It can be used to adjust the cable force during the construction of cable-stayed bridges. However, due to some characteristics of the pressure gauge itself, the pointer is easy to deviate. Due to the disadvantages of severe jitter, large reading errors, and the need to convert load indication values, it...

Claims

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Application Information

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IPC IPC(8): G01L5/04
CPCG01L5/04
Inventor 蓝章礼刘芳张洪杨扬陈巍
Owner CHONGQING JIAOTONG UNIVERSITY
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