scholarly journals A Sensor for Broken Wire Detection of Steel Wire Ropes Based on the Magnetic Concentrating Principle

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3763 ◽  
Author(s):  
Zhang ◽  
Jing ◽  
Xu ◽  
Zhan ◽  
Tan
Keyword(s):  
Permanent Magnet ◽  
Structural Parameters ◽  
Steel Wire ◽  
Sensor Arrays ◽  
Wire Rope ◽  
Hall Sensor ◽  
Wire Ropes ◽  
Depth Analysis ◽  
The Wire ◽  
Lift Off

Electromagnetic testing is the most widely used technique for the inspection of steel wire ropes. As one of the electromagnetic detecting approaches, the magnetic flux leakage (MFL) method has the best effect for the detection of broken wires. However, existing sensors based on MFL method still have some problems. (1) The size of the permanent magnet exciter is usually designed according to experience or rough calculation, and there is not enough depth analysis for its excitation performance; (2) Since the detectable angular range for a single Hall component is limited, Hall sensor arrays are often employed in the design of MFL sensors, which will increase the complexity of the subsequent signal processing due to the extensive use of Hall components; (3) Although the new magneto-resistance sensor has higher sensitivity, it is difficult to be applied in practice because of the requirement of the micron-level lift-off. To solve these problems, a sensor for the detection of broken wires of steel wire ropes based on the principle of magnetic concentration is developed. A circumferential multi-circuit permanent magnet exciter (CMPME) is employed to magnetize the wire rope to saturation. The traditional Hall sensor array is replaced by a magnetic concentrator to collect MFL. The structural parameters of the CMPME are optimized and the performance of the magnetic concentrator is analyzed by the finite element method. Finally, the effectiveness of the designed sensor is verified by wire breaking experiment. 1–5 external broken wires, handcrafted on the wire rope with a diameter of 24 mm, can be clearly identified, which shows great potential for the inspection of steel wire ropes.

scholarly journals Design of Tunnel Magnetoresistive-Based Circular MFL Sensor Array for the Detection of Flaws in Steel Wire Rope

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Liu Xiucheng ◽  
Wang Yujue ◽  
Wu Bin ◽  
Gao Zhen ◽  
He Cunfu
Keyword(s):  
Magnetic Field ◽  
Sensor Array ◽  
Steel Wire ◽  
Flaw Detection ◽  
Sensor Arrays ◽  
Wire Rope ◽  
Mutual Correlation ◽  
Wire Ropes ◽  
Technical Requirements ◽  
Lift Off

Tunnel magnetoresistive (TMR) devices have superior performances in weak magnetic field detection. In this study, TMR devices were first employed to form a circular magnetic flux leakage (MFL) sensor for slight wire rope flaw detection. Two versions of this tailor-made circular TMR-based sensor array were presented for the inspection of wire ropes with the diameters of 14 mm and 40 mm, respectively. Helmholtz-like coils or a ferrite magnet-based magnetizer was selected to provide the proper magnetic field, in order to meet the technical requirements of the TMR devices. The coefficient of variance in the flaw detection performance of the sensor array elements was experimentally estimated at 4.05%. Both versions of the MFL sensor array were able to detect multiple single-broken wire flaws in the wire ropes. The accurate axial and circumferential positions of these broken wire flaws were estimated from the MFL scanning image results. In addition, the proposed TMR-based sensor array was applied to detect the MFL signal induced by slight surface wear defects. A mutual correlation analysis method was used to distinguish the signals caused by the lift-off fluctuation from the MFL scanning image results. The MFL sensor arrays presented in this study provide inspiration for the designing of tailor-made TMR-based circular sensor arrays for cylindrical ferromagnetic structural inspections.

Research on the Tire Rope Lift-Off Process

2015 ◽  
Vol 713-715 ◽  
pp. 122-125
Author(s):  
Li Jun Qiu ◽  
Su Ying Xu
Keyword(s):  
Steel Wire ◽  
Wire Rope ◽  
The Body ◽  
Green Tape ◽  
Milling Method ◽  
Wire Cutting ◽  
Layered Approach ◽  
The Wire ◽  
Lift Off ◽  
Extrusion Method

Tire crushing body is divided for the purpose of separating the wire. Wheels of Steel Shares will be made by a single, Stripping the wire and colloidal by roll extrusion. The tread belt layer composed of steel wire rope is made. Peel method using a roll extrusion method can not. It is after stripping tread peeling rope belt layer to peel. Tread was cut into strips at first, then stripped from steel tread belt layer surface,.With a layered approach to rope belt layer stripped from the carcass . You can use sliced ​​or milling method to release the rope. Sliced ​​on the rope can form a sheet body peeling. Milling peeling green tape layer is formed on the wire cutting and tearing. Dividing the body on the fixed milling peeling easier.

The Decontaminating Device in Steel Wire Rope Automatic Cleaning, Detection and Maintenance Integration System

2013 ◽  
Vol 483 ◽  
pp. 382-385 ◽  
Author(s):  
Jun Jie Chen ◽  
Hui Wang ◽  
Jing Sheng Lin ◽  
Chao Fu ◽  
Lu Tang
Keyword(s):  
Service Life ◽  
Simulation Analysis ◽  
Steel Wire ◽  
Wire Rope ◽  
Elastic Plates ◽  
Integration System ◽  
Driving System ◽  
Wire Ropes ◽  
System A ◽  
The Wire

In order to improve the service life of wire rope used n tensile stringing, an automatic cleaning, detection and maintenance integration system was designed. Through the simulation analysis of elastic plates that fix the fixed brushes and the design of the rotating brushes driving system, a wire rope decontamination device assembled fixed brushes and rotating brushes was developed according to the demand of steel wire decontamination. The brush head adopts the design concept of elastic device, which makes the wire rope pressing force adjustable, ensures the wire connectors passable and makes the axial dirt sweeping of different diameter wire rope possible. The overall rotation mechanism with multiple brushes can circumferentially sweep the dirt in the wire rope gap. Then, the wire ropes were comprehensively sweeped with no dead cleanup. The device has been actually used, and the results showed that the decontamination effect is good.

Arrangement Characteristics and Wear Distribution of Wire Rope in Parallel Grooved Multi-Layer Winding

2013 ◽  
Vol 423-426 ◽  
pp. 842-845 ◽  
Author(s):  
Zhi Hui Hu ◽  
Yong Hu ◽  
Ji Quan Hu
Keyword(s):  
Experimental Study ◽  
Wire Rope ◽  
Wire Ropes ◽  
The Wire ◽  
Wear Damage

Based on the analysis of multi-layer winding arrangement characteristic of the wire rope in Lebus drum, the experimental study is carried on wear distribution of the wire rope in parallel grooved multi-layer winding. The result shows that, the wire rope is arranged regularly in each drum area in parallel grooved multi-layer winding; the wear of wire ropes in crossover zone is more serious than that of the parallel zone; in the same-layer wire rope winding in crossover zone, the wear damage during the wire rope winding in crossover zone at the end of each-layer drum is the most serious.

scholarly journals Effect of Structure Parameters on Polycal Wire Rope Isolator Stiffness-Damping Characteristics

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Shaowu Tu ◽  
Xiaofeng Lu ◽  
Xiaolei Zhu
Keyword(s):  
Prediction Models ◽  
Structural Parameters ◽  
Wire Rope ◽  
Diameter Ratio ◽  
Element Analysis ◽  
Damping Characteristics ◽  
Bending Radius ◽  
Pitch Length ◽  
The Wire ◽  
Wire Strand

Wire rope isolators are mainly used to isolate vibration and protect precise equipment. However, the issue of regulation of vibration isolators taking into account the nonlinearity of their characteristics was poorly understood in the modern literature. In this paper, the influence of structural parameters (diameter ratio and lay pitch of the single strand, and lay pitch and bending radius of the wire rope) on stiffness-damping characteristics of the Polycal WRI was investigated by the simplified finite element analysis method. The stiffness and damping prediction models including structural parameters and material properties were established. The results showed that the stiffness-damping characteristics were the best; when the diameter ratio of wire strand was 1.1, the inside layer wire pitch length was 6 times the diameter of the wire strand, the outside layer wire pitch length was 11 times the diameter of the wire strand, the pitch length of the wire rope was 7.5 times its diameter, and the bending radius was equal to 46.5 mm. The errors of the prediction for prestiffness and softened stiffness were within 5%, and the errors of prediction for the energy dissipation coefficient were within 10%.

Wire Cable Failures in Climbing Anchor Chocks

2007 ◽  
Vol 348-349 ◽  
pp. 165-168
Author(s):  
Jeffrey Vogwell ◽  
Jose Maria Minguez
Keyword(s):  
Failure Modes ◽  
Impact Force ◽  
Steel Wire ◽  
Research Programme ◽  
Wire Rope ◽  
Rock Climbing ◽  
Light Weight ◽  
Secure Attachment ◽  
Rock Face ◽  
The Wire

Anchor chocks are used in the sport of rock climbing for providing secure attachment to a rock face. They are used at regular intervals and must be light weight (since many are carried) and also sufficiently strong to withstand an impact force should a climber fall from a height. In chock design, steel wire cable is widely used for connecting the nut component, which is wedged into a rock crevice, to the free end which attaches, via a karabiner link, to the safety rope. However, the wire cable is vulnerable to failure as it can fray with use at exposed ends - especially when folded into a loop using tight bends. Also, the ferrule end connections are considered a potential design weakness. In a research programme tests have been carried out on new and also some well used anchor chocks and has revealed very different, and some unpredicted, failure modes – depending on the state of the wire rope and whether the applied load at failure was static or impact. This paper presents the results of test failures for a range of chocks and discusses the benefits of using single lengths of wire cable with suitably swaged end ferrules.

Multi-loop magnetisation method for detecting coal mine wire rope defects

2020 ◽  
Vol 62 (9) ◽  
pp. 540-549
Author(s):  
Wang Hongyao ◽  
Tian Jie ◽  
Meng Guoying ◽  
Zhou Junying ◽  
Hua Gang
Keyword(s):  
Permanent Magnet ◽  
Coal Mine ◽  
Detection Method ◽  
Cost Effective ◽  
Wire Rope ◽  
Degree Of Saturation ◽  
Detection Accuracy ◽  
Test Model ◽  
Wire Ropes ◽  
Shape Structure

Existing methods for detecting magnetic leakage signals from damaged wire ropes require axial saturation magnetisation and the accuracy of the detection equipment depends on the degree of saturation of the magnetisation. Moreover, owing to the special characteristics of the structure, diameter and operating environment of the wire rope, it is difficult to achieve the expected magnetisation effect. Consequently, in addition to other issues, the detection accuracy and versatility of the equipment are low. This study proposes a method based on spatial multi-dimensional orthogonal array loop magnetisation to detect coal mine wire rope defects. First, a sensor excitation structure model is developed. Then, a method for detecting the radial magnetic flux using permanent magnet arrays is analysed and the influence of the number of permanent magnet radial magnetic blocks on the magnetisation effect is studied. In addition, a wire rope detection method based on the principle of clustering is investigated and used to discuss the influence of the shape, structure and size of the sensor on the magnetisation effect. Finally, through laboratory experiments, the applicability of the test model and the proposed method are verified. The results show that the magnetisation effect is better and more cost-effective when the number of permanent magnet radial magnetic blocks is eight and that the proposed detection method can effectively identify damaged wire rope joints. Furthermore, the proposed equipment achieves a signal-tonoise ratio of 28 dB, thereby improving the reliability of damage detection.

Research of On-Line Detection Apparatus for Industrial Steel Wire Rope

2011 ◽  
Vol 48-49 ◽  
pp. 924-927 ◽  
Author(s):  
Xiao Yong Zhong ◽  
Xiao Hong Zhang
Keyword(s):  
Software Design ◽  
Steel Wire ◽  
Processing System ◽  
Wire Rope ◽  
Hall Sensor ◽  
Line Detection ◽  
Signal Processing System ◽  
On Line ◽  
New Type ◽  
Non Destructive

A new type of steel wire rope non destructive evaluation (NDE) apparatus is presented. It is composed of Hall sensor and signal processing system based on embedded micro processor. The apparatus detects flaws of steel wire rope real-time and on-line. The detection principle, hardware structure and software design of the apparatus are introduced. Examples of the application are given. The experiment results show that quantitatively defect detection of steel wire rope is attained. The apparatus can also be used for the test of the ferromagnetic bars.

Sign in / Sign up

Export Citation Format

Share Document