A single-stage coil cable force sensor based on self-inductance principle and its testing method

A cable force sensor, self-inductive technology, applied in tension measurement and other directions, can solve the problems of slow response speed, low signal-to-noise ratio, and high cost, and achieve the effect of reducing lead wires, short response time, and smaller volume

Active Publication Date: 2018-07-06
DALIAN UNIV OF TECH
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Problems solved by technology

[0008] In order to solve the problems of the existing magnetoelastic effect sensor with many coils, large volume, high cost, slow response speed, and low signal-to-noise ratio, the present invention provides a single-stage coil cable force sensor based on the principle of self-inductance and its test method

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  • A single-stage coil cable force sensor based on self-inductance principle and its testing method
  • A single-stage coil cable force sensor based on self-inductance principle and its testing method
  • A single-stage coil cable force sensor based on self-inductance principle and its testing method

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Embodiment Construction

[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0048] The present invention provides a single-stage coil cable force sensor based on the principle of self-inductance and its testing method. Its working principle is to measure the change of the self-inductance of the self-inductance coil to deduce the change of the cable force, and integrate the excitation coil and the induction coil change. Such as figure 1 As shown, it includes loading device 1, loading fixture 2, and specimen clamping head 3. Before the experiment, a section of steel cable with the same specification as the steel cable to be tested is taken as steel cable specimen 4, and the coil skeleton required for winding the self-inductance coil 5. The space between the coil frame 5 and the steel cable test piece 4 is filled with a foam agent 6 and a single-stage coil cable force sensor 7 .

[0049] figure 2 The self-inductance measurement circ...

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Abstract

The invention provides a single-stage coil cable tension sensor based on a self-inductance principle and a test method thereof, and belongs to the technical field of structural health monitoring. The single-stage coil cable tension sensor comprises a magnetic conductive steel cable test piece, a single-stage coil cable tension sensor for cable tension measurement, a coil skeleton for winding the sensor, a loading device, a test piece fixing and clamping device, a generation circuit for generating a self-inductance coil sensor excitation signal, an amplification circuit, a filtering circuit, an effective value circuit and a digital analog conversion circuit and other circuits for analyzing and processing each signal. The steel cable test piece magnetic permeability variance is used as the intermediate quantity, and a linear relation between the cable tension value and the self-inductance variance is established so that the cable tension value can be measured. The single-stage coil cable tension sensor based on a self-inductance principle and the test method thereof can solve the problems that a traditional magnetic flux cable tension sensor has more coils and is large in volume, and is low in anti-interference capability, and have the advantages of being simple in manufacturing process, being small in volume, and being able to improve the signal to noise ratio of the sensor.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring and relates to a cable force monitoring method, in particular to a single-stage coil cable force sensor using the principle of self-inductance and a testing method thereof. Background technique [0002] Due to the advantages of high flexibility, high strength and low frequency, steel cables have been widely used in the fields of large-span and large-scale building structures and traction machinery. The monitoring of cable force is an important symbol to measure whether the steel cable is in normal operation state, but it has also become a difficult technology recognized in the world. Therefore, it is particularly important to monitor the cable force of the steel cable. [0003] At present, the methods commonly used in the cable force monitoring technology of steel cables are: (1) oil pressure gauge reading method; (2) pressure sensor method; (3) frequency measurement method; ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/10
CPCG01L5/10
Inventor 修成竹任亮李宏男
Owner DALIAN UNIV OF TECH
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