CN107271026A - A kind of method of steel wire rope oscillation crosswise measurement - Google Patents
A kind of method of steel wire rope oscillation crosswise measurement Download PDFInfo
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- CN107271026A CN107271026A CN201710550801.9A CN201710550801A CN107271026A CN 107271026 A CN107271026 A CN 107271026A CN 201710550801 A CN201710550801 A CN 201710550801A CN 107271026 A CN107271026 A CN 107271026A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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Abstract
The invention discloses a kind of method of steel wire rope oscillation crosswise measurement, comprise the following steps first to set image capturing system, then the actual height and developed width of high-speed camera shooting area are set out on wing flats, the image that program loading is shot is detected by computer steel wire rope oscillation crosswise, and a region M is selected in the picture, and binary conversion treatment is carried out to region M by threshold value, and then calculating obtains pixel coordinate value of the steel wire rope centre of form in the M of region, pass through the engineer's scale between picture traverse and the developed width of shooting area, calculate actual position coordinate of the steel wire rope centre of form in wing flats, and then obtain the actual vibration displacement of steel wire rope and the corresponding moment obtains steel wire oscillation crosswise time domain waveform.The present invention reduces the preparation of steel wire rope vibration measurement, cost is reduced, and conveniently, accurately steel wire rope vibration characteristics is analyzed, the scheme for reducing or controlling steel wire rope oscillation crosswise is formulated accordingly.
Description
Technical field
The present invention relates to a kind of steel wire rope oscillation crosswise measurement method, be based particularly on high-speed camera IMAQ and
The method that Computer Image Processing principle determines the measurement of steel wire rope oscillation crosswise.
Background technology
Mine hoist carries the lifting, the lifting of personnel, material of coal and ore as the key equipment of Mine haul
The transport task of material and equipment, is the visual plant for contacting underground and ground.Steel wire rope as lifting system primary drive side
Formula, its oscillation crosswise directly influences the stability of lifting process and the fatigue life of steel wire rope, when steel wire rope oscillation crosswise position
It may interfere when moving past big with coming in contact property of surrounding objects, seriously threaten the security of lifting process.
Research steel wire rope lateral dynamic characteristics have important meaning to improving by the stability of the system of the kind of drive of steel wire rope
Justice, current researcher has been proposed a variety of numerical computation methods to solve the vibration problem of steel wire rope, but can not verify
The correctness of these numerical computation methods；The Chinese patent of Application No. 201410577225.3 discloses a kind of axial movement rope
The method of oscillation crosswise examining system, the process employs the top that laser type displacement transducer is arranged on to mobile rope, and with shifting
Running rope is run simultaneously, and the shortcoming of the patent is：Specific implementation difficulty is big and can not determine that laser displacement is sensed in its running
Whether device itself vibrates, nothing and then the accuracy that can not ensure measurement；The China of also Application No. 201510562399.7 is special
Profit, with the oscillation crosswise of light veil type laser displacement sensor measuring steel wire rope, it is to detection steel wire rope larger displacement (as lifted
Displacement of the steel wire rope parallel to spool axis direction nearby of machine reel), would have to increase the quantity of laser sensor, therefore lead
Measurement cost is caused to be substantially improved.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of based on high-speed camera IMAQ and computer picture
The method that handling principle determines the measurement of steel wire rope oscillation crosswise, using the technical program, which reduces steel wire rope vibration measurement
Preparation, reduces cost, and conveniently, accurately steel wire rope vibration characteristics is analyzed, for verifying that steel wire rope vibrates
The numerical computation method of problem or the correctness of simulation analysis, formulate the scheme for reducing or controlling steel wire rope oscillation crosswise accordingly.
In order to achieve the above object, the technical solution adopted in the present invention is as follows：A kind of steel wire rope oscillation crosswise measurement
Method, specifically includes following steps：
(a), image capturing system is set, and image capturing system is made up of a high-speed camera and wing flats, taken the photograph at a high speed
Camera is oppositely arranged with wing flats, steel wire rope is vertically arranged between high-speed camera and wing flats and parallel with wing flats；
(b) actual height and developed width of high-speed camera shooting area, are set out on wing flats.
(c), detect that program loads the image that high-speed camera is shot by computer steel wire rope oscillation crosswise, by image
Width is set to X-axis, and picture altitude is set as Z axis, and selectes out a region M in the picture；
(d) m × n matrix A, is defined with region M height m pixels and width n-pixel, one is opened up in a computer
Individual m * n matrix A internal memories, global threshold is set by region M progress binary conversion treatments by auto-thresholding algorithm, and
To 01 matrix A of region M images；
(e) formula is utilized
Draw the rower that i, j in pixel coordinate value of the steel wire rope centre of form in width X-direction in the M of region, formula are matrix A
With row mark, a(i,j)Element in representing matrix A；
(f), according to the engineer's scale q between picture traverse and the developed width of shooting area, steel wire rope shape in the M of zoning
Actual position coordinate of the heart position in wing flats planeSubtract the position coordinates L of initial time0, obtain vibrating position
Move St=Lt-L0, t represents the moment, if picture number is n, and the filming frequency of high-speed camera is f, and unit is fps, then moment t
=n/f, according to the actual vibration displacement S of steel wire ropetWith it is corresponding at the time of t obtain the time domain waveform of steel wire rope oscillation crosswise
(St-t)。
The beneficial effects of the invention are as follows：(1) present invention passes through high-speed camera IMAQ and Computer Image Processing
Principle meets institute with non-contacting metering system, static measuring terminals, adjustable big detection range, easy mode of operation
There is the steel wire rope oscillation crosswise detection for the system of the kind of drive with steel wire rope (axial movement rope)；(2) The present invention reduces shake
The preparation of dynamic measurement, reduces cost, and conveniently, accurately steel wire rope vibration characteristics is analyzed, and (3) can pass through one
Secondary measurement can obtain the vibration characteristics of many steel wire ropes in field range, the numerical computations available for checking steel wire rope vibration problem
The accuracy of method or simulation analysis, formulates the scheme for reducing or controlling steel wire rope oscillation crosswise accordingly.
Brief description of the drawings
Fig. 1 is high-speed camera and steel wire rope position view；
Fig. 2 is steel wire rope oscillation crosswise time domain beamformer.
Fig. 3 is steel wire rope of hoist oscillation crosswise measuring system structure chart.
1 high-speed camera, 2 steel wire ropes, 3 wing flats in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to shown in Fig. 1-3：Using the steel wire rope horizontal space vibration detection between cylindrical drum hoist reel and head sheave as
Example, as shown in figure 3,1 is lifting drum, 2 be the steel wire rope between hoisting drum and hoist(ing) pulley, and 3 be head sheave, and 4 is negative for lifting
Carry.So need detection is exactly the oscillation crosswise between lifting drum 1 and head sheave 3, is setting up flat with steel wire rope intersection
Areal coordinate, wirerope axis between lifting drum 1 and head sheave 3 is to for Z axis, and X-axis is perpendicular to hoisting drum axis and wirerope axis
Line, then the oscillation crosswise of steel wire rope is considered as to cover and shaking along the vibration in X-Z plane direction and the detection zone of setting
Dynamic four corner.
For the method for the steel wire rope oscillation crosswise measurement between cylindrical drum hoist reel and head sheave, following step is specifically included
Suddenly：
(a), image capturing system is set, and image capturing system is made up of a high-speed camera 1 and wing flats 3, at a high speed
Video camera 1 is oppositely arranged with wing flats 3, and steel wire rope 2 is vertically arranged between high-speed camera 1 and wing flats 3 and and background
Shield 3 parallel；
(b) actual height and developed width of the shooting area of high-speed camera 1, are set out on wing flats 3；
(c), by C++Builder XE integrating and developing platforms, monocular camera machine vision is based on using the exploitation of C++ programming languages
The image shot of steel wire rope oscillation crosswise measurement detection program loading high-speed camera 1, utilize C++Builder's
TBitmap classes read the bitmap file of steel wire rope oscillation crosswise captured by wherein one high-speed camera 1, and picture traverse is set to
X-axis, picture altitude is set as Z axis, and selectes out the region M of a rectangle in the picture, and the width of region M images is m picture
(m is equal to artwork width to element during measurement single wire rope oscillation crosswise, should be with steel wire rope during many 2 oscillation crosswises of steel wire rope of measurement
The size concrete analysis setting of artwork shared by oscillation crosswise maximum amplitude), it is highly n pixel (steel wire rope in survey region M
Axial profile line is approximately straightway)；
(d), by the starting row i and total line number n of the scanline function selection area M images in TBitmap classes, with area
Domain M height m pixels and width n-pixel, defines m × n matrix A, opens up in a computer in a m * n matrix A
Deposit, global threshold is set by region M progress binary conversion treatments by auto-thresholding algorithm, by the picture of image in the M of region
Element is divided into two pixel groups of steel wire rope pixel group and background board pixel group, then according to steel wire rope pixel group in the M images of region
Position (row and column where i.e. each pixel) numerical value of same position in matrix A is set to 1 entirely, then by its in matrix A
The numerical value of his position is set to 0 entirely, has thus just obtained 01 matrix A of one and region M image identical dimensionals；
(e) formula, is utilized
Show that i, j are respectively matrix A in pixel coordinate value of the steel wire rope centre of form on width x-axis direction in the M of region, formula
Rower and row are marked, a(i,j)Element in representing matrix A；
(f), according to the engineer's scale q between picture traverse and the developed width of shooting area, steel wire rope shape in the M of zoning
Actual position coordinate of the heart position in wing flats planeSubtract the position coordinates L of initial time0, obtain vibrating position
Move St=Lt-L0, t represents the moment, if picture number is n, and the filming frequency of high-speed camera is f, and unit is fps, then moment t
=n/f, according to the actual vibration displacement S of steel wire ropetWith it is corresponding at the time of t obtain the time domain waveform of steel wire rope oscillation crosswise
(St-t)；
, can be same to the vibrational image that high-speed camera shoots many steel wire ropes in visual field by the division limits on image
When gather, according to above-mentioned measuring method, obtain the oscillation crosswise measurement of many steel wire ropes.
The above method is used in mine in the present embodiment, as other embodiment, can be used for other hanging weights
Occasion, such as elevator, crane, hang ship, tower crane.
Claims (1)
1. a kind of method of steel wire rope oscillation crosswise measurement, it is characterised in that：Specifically include following steps：
(a), image capturing system is set, and image capturing system is made up of a high-speed camera (1) and wing flats (3), at a high speed
Video camera (1) is oppositely arranged with wing flats (3), by steel wire rope (2) be vertically arranged in high-speed camera (1) and wing flats (3) it
Between and it is parallel with wing flats (3)；
(b) actual height and developed width of high-speed camera (1) shooting area, are set out on wing flats (3)；
(c), detect that program loads the image that high-speed camera (1) is shot by computer steel wire rope oscillation crosswise, by image
Width is set to X-axis, and picture altitude is set as Z axis, and selectes out a region M in the picture；
(d) m × n matrix A, is defined with region M height m pixels and width n-pixel, a m is opened up in a computer
× n matrix A internal memories, set global threshold by region M progress binary conversion treatments, and obtain area by auto-thresholding algorithm
01 matrix A of domain M images；
(e) formula is utilized
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Draw i, j in pixel coordinate value of the steel wire rope centre of form in width X-direction in the M of region, formula not Wei matrix A rower and
Row mark, a(i,j)Element in representing matrix A；
(f), according to the engineer's scale q between picture traverse and the developed width of shooting area, steel wire rope centre of form position in the M of zoning
Put the actual position coordinate in wing flats planeSubtract the position coordinates L of initial time0, obtain vibration displacement St=
Lt-L0, t represents the moment, if picture number is n, and the filming frequency of high-speed camera is f, and unit is fps, then moment t=n/f,
According to the actual vibration displacement S of steel wire ropetWith it is corresponding at the time of t obtain the time domain waveform (S of steel wire rope oscillation crosswiset-t)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710550801.9A CN107271026B (en) | 2017-07-07 | 2017-07-07 | Method for measuring transverse vibration of steel wire rope |
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| CN201710550801.9A CN107271026B (en) | 2017-07-07 | 2017-07-07 | Method for measuring transverse vibration of steel wire rope |
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| CN108680243A (en) * | 2018-03-30 | 2018-10-19 | 昆山迈致治具科技有限公司 | Detection method, device, system and the storage medium of object vibration |
| CN109139019A (en) * | 2018-09-04 | 2019-01-04 | 中铁十二局集团有限公司 | It is latent to bury the monitoring method and monitoring device that Existing Subway road is cut through under bored tunnel |
| CN110987148A (en) * | 2019-12-05 | 2020-04-10 | 浙江理工大学 | Knitting needle vibration detection system and method based on image tracing point dynamic tracking analysis |
| WO2020191704A1 (en) * | 2019-03-22 | 2020-10-01 | 东北大学 | Composite material dynamic fatigue testing device and method based on reverse resonance |
| WO2020191703A1 (en) * | 2019-03-22 | 2020-10-01 | 东北大学 | Reverse resonance-based composite material thermal vibration fatigue test apparatus and method |
| CN112085787A (en) * | 2020-07-20 | 2020-12-15 | 中国矿业大学 | Monocular vision-based hoisting steel wire rope spatial vibration measurement method |
| CN113892015A (en) * | 2019-09-03 | 2022-01-04 | 株式会社新川 | Vibration detection system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680243A (en) * | 2018-03-30 | 2018-10-19 | 昆山迈致治具科技有限公司 | Detection method, device, system and the storage medium of object vibration |
| CN109139019A (en) * | 2018-09-04 | 2019-01-04 | 中铁十二局集团有限公司 | It is latent to bury the monitoring method and monitoring device that Existing Subway road is cut through under bored tunnel |
| WO2020191704A1 (en) * | 2019-03-22 | 2020-10-01 | 东北大学 | Composite material dynamic fatigue testing device and method based on reverse resonance |
| WO2020191703A1 (en) * | 2019-03-22 | 2020-10-01 | 东北大学 | Reverse resonance-based composite material thermal vibration fatigue test apparatus and method |
| CN113892015A (en) * | 2019-09-03 | 2022-01-04 | 株式会社新川 | Vibration detection system |
| CN110987148A (en) * | 2019-12-05 | 2020-04-10 | 浙江理工大学 | Knitting needle vibration detection system and method based on image tracing point dynamic tracking analysis |
| CN112085787A (en) * | 2020-07-20 | 2020-12-15 | 中国矿业大学 | Monocular vision-based hoisting steel wire rope spatial vibration measurement method |
| CN112085787B (en) * | 2020-07-20 | 2024-04-23 | 中国矿业大学 | Method for measuring space vibration of hoisting steel wire rope based on monocular vision |
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