CN104344789A - System and method for monitoring member deflection in bearing capacity test - Google Patents
System and method for monitoring member deflection in bearing capacity test Download PDFInfo
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- CN104344789A CN104344789A CN201310311789.8A CN201310311789A CN104344789A CN 104344789 A CN104344789 A CN 104344789A CN 201310311789 A CN201310311789 A CN 201310311789A CN 104344789 A CN104344789 A CN 104344789A
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Abstract
The invention relates to a system and method for monitoring deflection of a transmission line tower member in a bearing capacity test. The system utilizes an image monitoring system to monitor situations of changes of the member in a test process in real time, displays a monitored image on an image processing system, and utilizes the image processing system to measure deflection and a displacement situation of the member, so that the situations of the changes of the member in a flexing test can be grasped at any time, and when deflection or displacement of the member reaches a predetermined value of member deflection, the test is stopped manually. The method is simple, convenient and feasible, is easy to realize, and can better grasp member deflection, displacement, and deformation situations which relate to morphological changes in the flexing test.
Description
Technical field:
The present invention relates to electric power line pole tower deflection metrology method, more specifically relate to monitoring system and the monitoring method thereof of component amount of deflection in a kind of bearingtest.
Background technology:
Transmission tower structure real model experiment is inspection and the checking overall mechanical property of shaft tower and reasonable structure, the indispensable important means instructing tower structure optimal design, but because tower structure real model experiment will expend more human and material resources and financial resources usually, can only carry out limitedly, so at initial stage of structural design, particularly carry out desk study relatively or to design theory calculate study time, much more general dependence carries out analysis of experiments and theory calculate to structural elements.Therefore, component test is effectively supplementing of shaft tower real model experiment, and two kinds research technique is safe and reliable for guarantee transmission tower, research and design is theoretical, promote that transmission tower optimal design has effect of equal importance.
The test of what although component test system was carried out is structural elements or model pylon, experimental scale is relatively little, but its main experimental facility, equipment are similar to the composition structure of shaft tower real model experiment system, also comprise experiment hall, testing bed, testing stand, counter force wall, reaction frame, hydraulic loading system, strain and displacement measuring system, frequency image monitoring system, hanging device, test making apparatus and supporting analysis of experiments software, testing machine etc.
The steel tower rod member mainly iron and steel used in engineering, timber and concrete, along with the rise of compound substance, compound substance has appeared in the manufacture of power transmission and distribution shaft tower, composite material pole tower is applied in global portion area, and that wherein develops and apply relative maturity has the companies such as RS and Strongwell.The composite material pole tower of RS company exploitation comes into operation in European and American areas.About 300 base door shape composite material pole towers have been installed in 230kV transmission system by such as Canadian big lake Utilities Electric Co., also have 90 base complex pole towers just to come into operation in other electric pressure transmission system in addition.In Norway, the door shape composite material pole tower that use 170 base RS company produces by the 132kV transmission line of electricity of long 50 kilometers.Because compound substance modulus is little, compound substance single pole is out of shape comparatively large when stressed, brings impact to the design of composite material tower.When the bearingtest of steel component, be generally the mxm. getting bearing capacity be the maximum load capacity of rod member, but for compound substance rod member, because elasticity modulus of materials is little, likely because Deformation Member causes too greatly whole tower to destroy when not arriving the bearing capacity limit, so need to monitor the amount of deflection of component in process of the test and corner and measure, carry out the carrying out of Control experiment, thus make the larger load bearing capability of a member values of distortion such as the compound substance measured more have reference significance to whole Deethanizer design.
Summary of the invention:
The object of this invention is to provide monitoring system and the monitoring method thereof of component amount of deflection in a kind of bearingtest, amount of deflection in power transmission and transformation shaft tower component buckling test process and shift value are measured, both can the omnidistance deformation grasping component, also by controlling test the measured value of the deformation of member, very strong practicality can be had.
For achieving the above object, the present invention by the following technical solutions: the monitoring system of component amount of deflection in a kind of bearingtest, described monitoring device comprises measurement mechanism, monitoring system and control system; Described control system is connected with measurement mechanism.
The monitoring system of component amount of deflection in a kind of bearingtest provided by the invention, described measurement mechanism comprises fixed mount and is successively set on restraint device, load transducer and the charger between fixed mount; Component is provided with between described restraint device.
The monitoring system of component amount of deflection in a kind of bearingtest provided by the invention, described fixed mount is reaction frame; Described restraint device is upper end edge of a knife hinged-support and bottom edge of a knife hinged-support, and described upper end edge of a knife hinged-support is connected with one end of component respectively by flanged plate with bottom edge of a knife hinged-support;
The mouth groove direction of described edge of a knife hinge is vertical with the buckling direction of described component.
The monitoring system of component amount of deflection in another preferred a kind of bearingtest provided by the invention, described charger is actuator, between described actuator range is 1.2 to 1.5 times of described component ultimate bearing capacity.
The monitoring system of component amount of deflection in a preferred a kind of bearingtest more provided by the invention, described control device connects described actuator.
The monitoring system of component amount of deflection in another preferred a kind of bearingtest provided by the invention, the image processing system that described monitoring system comprises image capturing system and is connected with image capturing system;
The face, place of the vertical described component generation flexing of described image capturing system arranges and records the image of described component generation flexing.
The monitoring method of the monitoring system of component amount of deflection in another preferred a kind of bearingtest provided by the invention, said method comprising the steps of:
(1) measure component length and be recorded to image processing system;
(2) component carries out flexing experiment by measurement mechanism;
(3) image capturing system acquisition member flexing image;
(4) image processing system process component flexing image;
(5) the amount of deflection situation of change of component is obtained;
The monitoring method of the monitoring system of component amount of deflection in another preferred a kind of bearingtest provided by the invention, load is loaded on described component by actuator by described flexing experiment, described actuator adopts classification load method to load, and described classification load increases progressively step by step according to 5% ratio of described component ultimate bearing capacity.
The monitoring method of the monitoring system of component amount of deflection in another preferred a kind of bearingtest provided by the invention, the load of the every one-level of described image capturing system collection actuator makes the image of described component generation flexing, stops experiment when described component bending deformation reaches boundary value.
Owing to have employed technique scheme, the beneficial effect that the present invention obtains is: the reason that electric power pylon destroys is generally that Local Members unstability causes, and be also not merely that component reaches stability bearing capacity when Local Members unstability, also be likely out of shape too greatly but do not reach Unstability Theory value and cause, what traditional buckling test generally obtained is unstability ultimate value, and do not consider to be out of shape the unstability caused too greatly, this method uses the situation of change of component in the real-time monitoring test process of frequency image monitoring system, the image monitored is shown screen display at PC, use the image processing software on PC to measure in real time the amount of deflection of component and misalignment simultaneously, the amount of deflection situation of change of component in buckling test can be grasped at any time, when the amount of deflection of component or displacement reach predetermined value, namely test is manually stopped.The method is simple and feasible, is easy to realize, can to there is the component amount of deflection of metamorphosis in buckling test, displacement, deformation have and grasp better, considers the shaft tower destabilization problems that distortion causes too greatly.
Accompanying drawing explanation
Fig. 1 is monitoring system structural representation of the present invention;
Fig. 2 is measurement mechanism structural representation of the present invention;
Fig. 3 is component deflection data process schematic diagram in bearingtest of the present invention;
Fig. 4 is edge of a knife hinged-support end view in invention
Wherein, 1-reaction frame, 2-upper end edge of a knife hinged-support, 3-flanged plate, 4-component, 5-load transducer, 6-actuator, 7-bottom edge of a knife hinged-support;
A represents the deflection value of component, and b represents component ends shift value.
Embodiment
Below in conjunction with embodiment, the invention will be described in further detail.
Embodiment 1:
As Figure 1-4, the monitoring system of the invention of this example comprises measurement mechanism, monitoring system and control system; Described control system is connected with measurement mechanism.Described measuring system comprises fixed mount and is successively set on restraint device, load transducer 5 and the charger between fixed mount; Component 4 is provided with between described restraint device.
Described fixed mount is reaction frame 1; Described restraint device is upper end edge of a knife hinged-support 2 and bottom edge of a knife hinged-support 7, and described upper end edge of a knife hinged-support 2 is connected respectively by flanged plate 3 one end with component 4 with bottom edge of a knife hinged-support 7; The mouth groove direction of described edge of a knife hinge is vertical with the buckling direction of component 4.Described charger is actuator 6, roughly calculates the reference ultimate bearing capacity of component 4 according to Euler's formula, then selects the actuator 6 of corresponding range according to bearing capacity, between described actuator 6 range is 1.2 to 1.5 times of described component 4 ultimate bearing capacity.
The image processing system that described monitoring system comprises image capturing system and is connected with described image capturing system, the face, place that described image capturing system, perpendicular to described component 4, flexing occurs arranges and records the image that flexing occurs described component 4; Described control device connects described actuator 6, and described control device controls actuator 6 pairs of components 4 and carries out loading load.
The monitoring method of this system is for first measuring component 4 length and being recorded in image processing system; Start to carry out flexing experiment to component by measurement mechanism; The flexing image of image capturing system acquisition member 4 is also sent to image processing system, described image processing system process component 4 flexing image; Finally obtain the amount of deflection situation of change of component 4.
In described flexing experiment, the displacement of upper end edge of a knife hinged-support 2 is 0, translation does not occur, and can only rotate, and bottom, the other one end edge of a knife hinged-support 7 of component 4 moves up and down with actuator 6.
Described actuator 6 adopts classification load method to load, and every grade is loaded as described component 4 and increases progressively step by step with reference to 5% of ultimate bearing force value, is respectively 5%, 10%, 15% ..., multistage loadings.
The image collected is sent on PC and shows in real time by described image capturing system.PC is installed image processing software.The Presentation Function of adjustment PC image processing system, making it component 4 can show completely on PC display screen.Open image processing software, record the length of component 4 by image processing software and component 4 measured value determines scale, formulate grid by scale at software interface, physical length that each length of side unit of grid is corresponding.Mobile grid, by movable end bottom edge of a knife hinged-support 7 initial position of component 4 just in time on grid limit, the transparency at image processing software interface is set, open the picture control page, transparency is set, make to open the monitoring page and also clearly can see grid, make marks in the displacement of component 4 and amount of deflection position during off-test.Do not change image displaying ratio and the position of supervisory system, actuator 6 every grade loaded rear image capturing system and imported the image that the load of every for the actuator 6 collected one-level makes described component 4 that flexing occur into image processing software, measure amount of deflection and displacement a and b of component 4, test is stopped after component 4 bending deformation arrives predetermined boundary value or actuator can not continue component 4 to be increased to load, described boundary value is 1/20th of component 4 length, component 4 payload values is now the ultimate bearing capacity of component 4 in shaft tower, the deflection value of the component 4 simultaneously measured and shift value are the actual value of component damage in shaft tower, and monitor the amount of deflection change procedure of component 4.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of this right.
Claims (9)
1. the monitoring system of component amount of deflection in bearingtest, is characterized in that: described monitoring device comprises measurement mechanism, monitoring system and control system; Described control system is connected with measurement mechanism.
2. the monitoring system of component amount of deflection in a kind of bearingtest as claimed in claim 1, is characterized in that: described measurement mechanism comprises fixed mount and is successively set on restraint device, load transducer and the charger between fixed mount; Component is provided with between described restraint device.
3. the monitoring system of component amount of deflection in a kind of bearingtest as claimed in claim 2, is characterized in that: described fixed mount is reaction frame; Described restraint device is upper end edge of a knife hinged-support and bottom edge of a knife hinged-support, and described upper end edge of a knife hinged-support is connected with one end of component respectively by flanged plate with bottom edge of a knife hinged-support;
The mouth groove direction of described edge of a knife hinge is vertical with the buckling direction of described component.
4. the monitoring system of component amount of deflection in a kind of bearingtest as claimed in claim 3, is characterized in that: described charger is actuator, between described actuator range is 1.2 to 1.5 times of described component ultimate bearing capacity.
5. the monitoring system of component amount of deflection in a kind of bearingtest as claimed in claim 4, is characterized in that: described control device connects described actuator.
6. the monitoring system of component amount of deflection in a kind of bearingtest as claimed in claim 1, is characterized in that: the image processing system that described monitoring system comprises image capturing system and is connected with image capturing system;
The face, place of the vertical described component generation flexing of described image capturing system arranges and records the image of described component generation flexing.
7. the monitoring method of the system as claimed in claim 1, is characterized in that: said method comprising the steps of:
(1) measure component length and be recorded to image processing system;
(2) component carries out flexing experiment by measurement mechanism;
(3) image capturing system acquisition member flexing image;
(4) image processing system process component flexing image;
(5) the amount of deflection situation of change of component is obtained.
8. monitoring method as claimed in claim 7, it is characterized in that: load is loaded on described component by actuator by described flexing experiment, described actuator adopts classification load method to load, and described classification load increases progressively step by step according to 5% ratio of described component ultimate bearing capacity.
9. monitoring method as claimed in claim 8, is characterized in that: the load of the every one-level of described image capturing system collection actuator makes the image of described component generation flexing, stops experiment when described component bending deformation reaches boundary value.
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| CN201310311789.8A CN104344789A (en) | 2013-07-23 | 2013-07-23 | System and method for monitoring member deflection in bearing capacity test |
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| CN201310311789.8A CN104344789A (en) | 2013-07-23 | 2013-07-23 | System and method for monitoring member deflection in bearing capacity test |
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Cited By (10)
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| CN105021133A (en) * | 2015-07-21 | 2015-11-04 | 鞍钢集团工程技术有限公司 | Measuring method of flexibility of power transmission line |
| CN106370415A (en) * | 2016-10-31 | 2017-02-01 | 西安建筑科技大学 | Automatically-controlled reciprocating load loading device for axial force-bearing component and using method thereof |
| CN106932160A (en) * | 2017-03-15 | 2017-07-07 | 上海建为历保科技股份有限公司 | Ancient building stress analysis method |
| CN110057316A (en) * | 2019-04-25 | 2019-07-26 | 华南理工大学 | A method of the tower crane rod piece buckling monitoring based on unmanned plane image recognition |
| CN110686632A (en) * | 2019-11-08 | 2020-01-14 | 河南工业大学 | Method for measuring initial geometric defects of H-shaped section steel compression bar |
| CN113155042A (en) * | 2021-04-13 | 2021-07-23 | 江苏大学 | Method for measuring thickness of transition zone of concrete internal interface |
| CN113267398A (en) * | 2021-04-30 | 2021-08-17 | 国网河北省电力有限公司衡水供电分公司 | Electric pole mechanics detection system, control method and server |
| CN113640098A (en) * | 2021-08-02 | 2021-11-12 | 中国电力工程顾问集团西南电力设计院有限公司 | Semi-rigid node test device capable of adjusting rigidity |
| CN114252331A (en) * | 2021-11-19 | 2022-03-29 | 中国建筑第八工程局有限公司 | Method for measuring bending deflection of compression bar test |
| CN114518295A (en) * | 2020-11-19 | 2022-05-20 | 中车株洲电力机车研究所有限公司 | Tower load measuring method, device and system |
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Cited By (14)
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| CN105021133B (en) * | 2015-07-21 | 2017-10-03 | 鞍钢集团工程技术有限公司 | A kind of measuring method for linear flexibility of transmitting electricity |
| CN105021133A (en) * | 2015-07-21 | 2015-11-04 | 鞍钢集团工程技术有限公司 | Measuring method of flexibility of power transmission line |
| CN106370415A (en) * | 2016-10-31 | 2017-02-01 | 西安建筑科技大学 | Automatically-controlled reciprocating load loading device for axial force-bearing component and using method thereof |
| CN106932160A (en) * | 2017-03-15 | 2017-07-07 | 上海建为历保科技股份有限公司 | Ancient building stress analysis method |
| CN110057316A (en) * | 2019-04-25 | 2019-07-26 | 华南理工大学 | A method of the tower crane rod piece buckling monitoring based on unmanned plane image recognition |
| CN110686632A (en) * | 2019-11-08 | 2020-01-14 | 河南工业大学 | Method for measuring initial geometric defects of H-shaped section steel compression bar |
| CN114518295A (en) * | 2020-11-19 | 2022-05-20 | 中车株洲电力机车研究所有限公司 | Tower load measuring method, device and system |
| CN113155042A (en) * | 2021-04-13 | 2021-07-23 | 江苏大学 | Method for measuring thickness of transition zone of concrete internal interface |
| CN113155042B (en) * | 2021-04-13 | 2022-11-18 | 江苏大学 | Method for measuring thickness of transition area of concrete internal interface |
| CN113267398A (en) * | 2021-04-30 | 2021-08-17 | 国网河北省电力有限公司衡水供电分公司 | Electric pole mechanics detection system, control method and server |
| CN113267398B (en) * | 2021-04-30 | 2023-02-24 | 国网河北省电力有限公司衡水供电分公司 | Electric pole mechanics detection system, control method and server |
| CN113640098A (en) * | 2021-08-02 | 2021-11-12 | 中国电力工程顾问集团西南电力设计院有限公司 | Semi-rigid node test device capable of adjusting rigidity |
| CN113640098B (en) * | 2021-08-02 | 2023-10-03 | 中国电力工程顾问集团西南电力设计院有限公司 | Semi-rigid node test device with adjustable rigidity |
| CN114252331A (en) * | 2021-11-19 | 2022-03-29 | 中国建筑第八工程局有限公司 | Method for measuring bending deflection of compression bar test |
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Application publication date: 20150211 |