CN112710547B - Damage detection method for metal rope - Google Patents
Damage detection method for metal rope Download PDFInfo
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- CN112710547B CN112710547B CN201911020587.1A CN201911020587A CN112710547B CN 112710547 B CN112710547 B CN 112710547B CN 201911020587 A CN201911020587 A CN 201911020587A CN 112710547 B CN112710547 B CN 112710547B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
Abstract
The invention discloses a metal rope damage detection method which comprises the following operation steps of firstly sampling a product, intercepting a section of metal rope to be detected by hydraulic pliers, reserving the section of metal rope as a sample A1 for detection, simultaneously selecting a plurality of sections of metal ropes with the same length and diameter and no damage as comparison samples A2, A3 and A4, and secondly, carrying out tension detection on each sampled sample to obtain a sample A1 and comparison samples A2, A3 and A4. According to the metal rope damage detection method, on one hand, the metal rope with large damage can be eliminated through comparison of a simple tension test and standard variance data and comparison of straight white data. On the other hand, in the process of electrifying the metal rope, the electric signals passing through the metal rope can be converted into images through the oscilloscope to be displayed, and through the operation, an operator can observe the radio wave images and amplify the signals, so that the damage state can be observed more visually.
Description
Technical Field
The invention relates to the technical field of metal rope damage detection, in particular to a metal rope damage detection method.
Background
Metal cords are used in material handling machines for lifting, pulling, tensioning and carrying purposes. The metal rope is high in strength, light in dead weight, stable in work, not easy to break the whole metal rope suddenly and reliable in work, but damage conditions such as corrosion, abrasion and kinking can occur to the metal rope when the metal rope is used for a long time, once the damage conditions occur, huge loss can be caused, economic loss and potential safety hazard exist, and therefore a method capable of detecting the metal rope is needed to verify the safety of the metal rope, and therefore the method for detecting the damage of the metal rope is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a damage detection method for a metal rope, and on one hand, equipment in the area can be compared with standard variance data through a simple tension test, and can eliminate some metal ropes with larger damage through comparison of straight white data. On the other hand, in the process of electrifying the metal rope, the electric signals passing through the metal rope can be converted into images through the oscilloscope to be displayed, and through the operation, an operator can observe the radio wave images and amplify the signals, so that the damage state can be observed more visually.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a damage detection method of a metal rope comprises the following operation steps:
s1: sampling, namely intercepting a section of metal rope to be detected by hydraulic pliers, reserving the metal rope as a sample A1 for the detection process, and selecting a plurality of sections of metal ropes with the same length and diameter and without damage as comparison samples A2, A3 and A4.;
s2: a step of tension detection, in which the sample A1 and the comparative samples A2, A3 and A4. obtained in the step are connected to a tension tester in a time-sharing manner, data are obtained through tension detection, the tension data of the sample A1 is F1, the tension data of the comparative samples A2, A3 and A4. are F2, F3 and F4., and the obtained tension data of the comparative samples A2, A3 and A4. are subjected to variance F2, F3 and F4.. to obtain a result FN;
s3: electrifying, respectively connecting two ends of the sample A1 obtained in the step and the comparative samples A2, A3 and A4. to two poles of a power supply, and connecting voltages with the same magnitude under the same environment and the same condition;
s4: and (3) wavelength detection, namely connecting an oscilloscope at two ends of the electrified metal rope, and recording the wavelength and the frequency of each sample in different time periods.
Preferably, the F1 of the tension test is the average value of a plurality of tests of the sample a1, and if F1 < FN, the sample a1 is a damaged metal rope.
Preferably, if F1 ≈ FN in the tension detection, the sample A1 is subjected to the next wavelength detection.
Preferably, the method comprises the following steps:
(1) pre-adjusting: rotating the brightness knob to the bottom counterclockwise, moving the vertical and horizontal positions to the middle, setting the attenuation at the highest gear, and setting the scanning at the outer X gear;
(2) turning on a power supply, and after an indicator light is turned on, waiting for one or two minutes for preheating and then carrying out related operation;
(3) firstly adjusting the brightness, then adjusting the focusing, and further adjusting the horizontal and vertical displacement to enable the bright spot to be in a proper central area;
(4) adjusting scanning, scanning micro-adjustment and X gain, and observing scanning;
(5) pulling out the outer X gear to a proper position of a scanning range gear, and observing a voltage waveform which is provided in the machine and changes in the vertical direction according to the sine and cosine law;
(6) the external voltage to be researched is input into the oscilloscope from the Y input and the ground, each gear is adjusted to a proper position, and the waveform of the voltage can be observed.
Preferably, if a large amplitude fluctuation of a certain section is observed in the wavelength detection process or the difference between the wavelength and the frequency in the comparison sample is large, the sample A1 is a damaged metal rope.
(III) advantageous effects
The invention provides a method for detecting damage of a metal rope, which has the following beneficial effects:
(1) the damage detection method of the metal rope can be compared with standard variance data through a simple tension test, and can eliminate some metal ropes with larger damage through comparison of straight white data;
(2) according to the method for detecting the damage of the metal rope, the electric signals passing through the metal rope can be converted into images through the oscilloscope to be displayed in the electrifying process of the metal rope, and an operator can observe the electric wave images, amplify the signals and observe the damage state more intuitively.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a damage detection method of a metal rope comprises the following operation steps:
s1: sampling, namely intercepting a section of metal rope to be detected by hydraulic pliers, reserving the metal rope as a sample A1 for the detection process, and selecting a plurality of sections of metal ropes with the same length and diameter and without damage as comparison samples A2, A3 and A4.;
s2: a step of tension detection, in which the sample A1 and the comparative samples A2, A3 and A4. obtained in the step are connected to a tension tester in a time-sharing manner, data are obtained through tension detection, the tension data of the sample A1 is F1, the tension data of the comparative samples A2, A3 and A4. are F2, F3 and F4., and the obtained tension data of the comparative samples A2, A3 and A4. are subjected to variance F2, F3 and F4.. to obtain a result FN;
s3: electrifying, respectively connecting two ends of the sample A1 obtained in the step and the comparative samples A2, A3 and A4. to two poles of a power supply, and connecting voltages with the same magnitude under the same environment and the same condition;
s4: and (3) wavelength detection, namely connecting an oscilloscope at two ends of the electrified metal rope, and recording the wavelength and the frequency of each sample in different time periods.
The F1 of the tension test is the average value of the test times of the sample A1, and if F1 < FN, the sample A1 is the damaged metal rope.
If F1 ≈ FN in the tension detection, the sample A1 is subjected to the next wavelength detection.
The method comprises the following steps:
(1) pre-adjusting: rotating the brightness knob to the bottom counterclockwise, moving the vertical and horizontal positions to the middle, setting the attenuation at the highest gear, and setting the scanning at the outer X gear;
(2) turning on a power supply, and after an indicator light is turned on, waiting for one or two minutes for preheating and then carrying out related operation;
(3) firstly adjusting the brightness, then adjusting the focusing, and further adjusting the horizontal and vertical displacement to enable the bright spot to be in a proper central area;
(4) adjusting scanning, scanning micro-adjustment and X gain, and observing scanning;
(5) pulling out the outer X gear to a proper position of a scanning range gear, and observing a voltage waveform which is provided in the machine and changes in the vertical direction according to the sine and cosine law;
(6) the external voltage to be researched is input into the oscilloscope from the Y input and the ground, each gear is adjusted to a proper position, and the waveform of the voltage can be observed.
If a large amplitude fluctuation is observed in a certain section in the wavelength detection process, or the difference between the wavelength and the frequency in the comparison sample is large, the sample A1 is a damaged metal rope.
In summary, in the method for detecting damage to a metal rope, during operation, a product is sampled, a section of the metal rope to be detected is cut by hydraulic pliers and reserved as a sample A1 for detection, meanwhile, a plurality of sections of the metal rope with the same length and diameter and without damage are selected as comparison samples A2, A3 and A4, tension detection is carried out on each sampled sample, the obtained sample A1 and the comparison samples A2, A3 and A4 are connected to a tension tester in a grading manner, data are obtained through tension detection, the tension data of the sample A1 are F1, the tension data of the comparison samples A2, A3 and A4 are F2, F3 and F4., the obtained tension data of the comparison samples A2, A3 and A4 are F2, F29 and F F4., the obtained result is obtained, the variance of the comparison samples A2, A3 and A4642 is less than the variance of the metal rope FN and the metal rope damage is found if the comparison sample A1 is FN and F1, if F1 is approximately equal to FN, the sample A1 is subjected to the next wavelength detection;
in the process of wavelength detection, firstly electrifying each sample, respectively connecting two ends of the obtained sample A1 and comparison samples A2, A3 and A4. to two poles of a power supply, connecting voltages with the same magnitude under the same environment and the same condition, connecting an oscilloscope at two ends of an electrified metal rope, pre-adjusting the oscilloscope in the use process of the oscilloscope, anticlockwise rotating a brightness knob to the bottom, vertically and horizontally shifting to the middle, attenuating to the highest gear, scanning to an outer X gear, then starting the power supply, waiting for one or two minutes for preheating after an indicator lamp is lightened, continuously adjusting the brightness, adjusting the focus, further adjusting the horizontal and vertical shifts to enable a bright spot to be in a central proper area, adjusting the scanning, scanning micro-adjustment and X gain after the operation is finished, observing and scanning, pulling out the outer X gear to a proper position of a scanning range gear, the voltage waveform which is provided in the observation machine and changes in the vertical direction according to the sine and cosine law is finally input into the oscilloscope from the Y input and the ground, each gear is adjusted to a proper position, the waveform of the voltage can be observed, the wavelength and the frequency of each sample in different time periods are recorded, and if the amplitude fluctuation of a certain section is observed to be larger or the difference between the amplitude fluctuation and the frequency in a comparison sample is larger in the wavelength detection process, the sample A1 is a damaged metal rope.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A damage detection method of a metal rope comprises the following operation steps:
s1: sampling, namely intercepting a section of metal rope to be detected by hydraulic pliers, reserving the metal rope as a sample A1 for the detection process, and selecting a plurality of sections of metal ropes with the same length and diameter and without damage as comparison samples A2, A3 and A4.;
s2: a step of tension detection, in which the sample A1 and the comparative samples A2, A3 and A4. obtained in the step are connected to a tension tester in a time-sharing manner, data are obtained through tension detection, the tension data of the sample A1 is F1, the tension data of the comparative samples A2, A3 and A4. are F2, F3 and F4., and the obtained tension data of the comparative samples A2, A3 and A4. are subjected to variance F2, F3 and F4.. to obtain a result FN;
s3: electrifying, respectively connecting two ends of the sample A1 obtained in the step and the comparative samples A2, A3 and A4. to two poles of a power supply, and connecting voltages with the same magnitude under the same environment and the same condition;
s4: and (3) wavelength detection, wherein an oscilloscope is connected to two ends of the electrified metal rope, and the wavelength and the frequency of each sample in different time periods are recorded.
2. The method for detecting damage to a metal cord as claimed in claim 1, wherein: the F1 of the tension test is the average value of the test times of the sample A1, and if F1 is less than FN, the sample A1 is the damaged metal rope.
3. The method for detecting damage to a metal cord according to claim 1 or 2, wherein: if F1 ≈ FN in the tension detection, the sample A1 is subjected to the next wavelength detection.
4. The use method of the oscilloscope in the metal rope damage detection method according to claim 1 comprises the following steps:
(1) pre-adjusting: rotating the brightness knob to the bottom counterclockwise, moving the vertical and horizontal positions to the middle, setting the attenuation at the highest gear, and setting the scanning at the outer X gear;
(2) turning on a power supply, and after an indicator light is turned on, waiting for one or two minutes for preheating and then carrying out related operation;
(3) firstly adjusting the brightness, then adjusting the focusing, and further adjusting the horizontal and vertical displacement to enable the bright spot to be in a proper central area;
(4) adjusting scanning, scanning micro-adjustment and X gain, and observing scanning;
(5) pulling out the outer X gear to a proper position of a scanning range gear, and observing a voltage waveform which is provided in the machine and changes in the vertical direction according to the sine and cosine law;
(6) the external voltage to be researched is input into the oscilloscope from the Y input and the ground, each gear is adjusted to a proper position, and the waveform of the voltage can be observed.
5. The method for detecting damage to a metal cord as claimed in claim 1, wherein: if a large amplitude fluctuation of a certain section is observed in the wavelength detection process, or the difference between the amplitude fluctuation and the wavelength and the frequency in the comparison sample is large, the sample A1 is a damaged metal rope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911020587.1A CN112710547B (en) | 2019-10-25 | 2019-10-25 | Damage detection method for metal rope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911020587.1A CN112710547B (en) | 2019-10-25 | 2019-10-25 | Damage detection method for metal rope |
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| CN112710547A CN112710547A (en) | 2021-04-27 |
| CN112710547B true CN112710547B (en) | 2022-04-01 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297805A (en) * | 2010-06-25 | 2011-12-28 | 上海宝钢工业检测公司 | Nondestructive test method of wire rope |
| CN102749256A (en) * | 2012-07-19 | 2012-10-24 | 长春机械科学研究院有限公司 | Structural non-linear fatigue damage testing system |
| CN105784837A (en) * | 2016-04-26 | 2016-07-20 | 常州机电职业技术学院 | Damage detection method and system for multi-strand wire rope |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018544B (en) * | 2016-06-24 | 2018-03-20 | 窦柏林 | A kind of steel wire rope Holographic test system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297805A (en) * | 2010-06-25 | 2011-12-28 | 上海宝钢工业检测公司 | Nondestructive test method of wire rope |
| CN102749256A (en) * | 2012-07-19 | 2012-10-24 | 长春机械科学研究院有限公司 | Structural non-linear fatigue damage testing system |
| CN105784837A (en) * | 2016-04-26 | 2016-07-20 | 常州机电职业技术学院 | Damage detection method and system for multi-strand wire rope |
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| CN112710547A (en) | 2021-04-27 |
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