Non-contact anchor rod drawing force measuring method based on eddy current impedance method

A non-contact, measurement method technology, applied in the direction of measuring force, measuring devices, instruments, etc., to achieve the effect of improving linear range and sensitivity, strong environmental adaptability, and large linear range

Active Publication Date: 2014-06-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the working condition that the bolt is embedded in the rock-soil medium and cannot directly measure the tensile force, and realize the indirect measurement of the tensile force on the bolt without contact with the bolt

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  • Non-contact anchor rod drawing force measuring method based on eddy current impedance method
  • Non-contact anchor rod drawing force measuring method based on eddy current impedance method
  • Non-contact anchor rod drawing force measuring method based on eddy current impedance method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] In order to make the object, technical solution and beneficial effect of the present invention clearer, the following will further describe in detail the embodiments of the present invention in conjunction with the accompanying drawings. Below the present invention is described further:

[0024] The invention provides a non-contact bolt tension measurement method based on the eddy current impedance method, the measurement method comprising the following steps:

[0025] S1: Carry out a calibration experiment on the eddy current sensor for measuring the bolt tension.

[0026] S1.1 Install the eddy current sensor 2 on any side of the nut 5 to be tested close to the pallet 6, and then install the anchor rod 4 on the tensile testing machine.

[0027] S1.2 Use a tensile testing machine to axially stretch the anchor rod 4. During this test, t...

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Abstract

The invention discloses a non-contact anchor rod drawing force measuring method based on an eddy current impedance method, and belongs to the technical field of modern measurement and control. The non-contact anchor rod drawing force measuring method comprises the steps of arranging an eddy current sensor on the surface of a nut in an anchor rod assembly, analyzing and obtaining a relationship between an impedance value of the eddy current sensor and a drawing force of an anchor rod through an impedance measuring and analyzing device, and thus indirectly reflecting the drawing force level of the anchor rod by adopting the change of a sensor impedance value which is actually measured and obtained. The non-contact anchor rod drawing force measuring method disclosed by the invention is simple and easy to implement, has a very good application value and can be used for measuring the drawing force of the anchor rod which is commonly used in roadway support.

Description

Technical field: [0001] The invention belongs to the field of modern measurement and control technology, in particular to a non-contact method for measuring the tensile force of a bolt based on an eddy current impedance method. The characteristics of the method are: non-contact, strong environmental adaptability, large linear range, high sensitivity, and measurement of various parameters. The tensile force on the bolt can be monitored through the calibrated eddy current sensor. Background technique: [0002] Coal roadway bolt support technology has many characteristics such as good support effect and low cost, and has become the preferred and efficient support method for coal mine roadway. However, due to the complexity of the surrounding rock conditions of the coal mine roadway project and the concealment of the project, it is difficult to control the construction quality, and the bolt is buried in the rock-soil medium and cannot directly measure the actual working conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14
Inventor 吴斌陈蕾刘秀成何存富
Owner BEIJING UNIV OF TECH
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