CN113324861A - Motion cable test platform - Google Patents
Motion cable test platform Download PDFInfo
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- CN113324861A CN113324861A CN202110776189.3A CN202110776189A CN113324861A CN 113324861 A CN113324861 A CN 113324861A CN 202110776189 A CN202110776189 A CN 202110776189A CN 113324861 A CN113324861 A CN 113324861A
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- 238000012360 testing method Methods 0.000 title claims abstract description 54
- 230000005540 biological transmission Effects 0.000 claims abstract description 73
- 238000011156 evaluation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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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
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
The invention relates to the technical field of cable fatigue resistance tests, in particular to a motion cable test platform, which comprises: the transmission rod is driven to rotate back and forth around the axis of the transmission rod; the swinging rod is arranged on the transmission rod and moves synchronously with the transmission rod, and the relative position of the swinging rod and the transmission rod can be adjusted; the limiting piece is arranged on the swinging rod and moves synchronously with the swinging rod, the relative position of the limiting piece and the swinging rod can be adjusted, and the limiting piece is used for the tested cable to pass through and clamp the tested cable; the bracket is used for connecting and fixing the end part of the tested cable; the relative position distribution between the connection point of the tested cable and the bracket and the clamping point of the limiting part and the tested cable is determined according to a motion state model of the use working condition of the motion cable constructed based on three-dimensional scanning reverse modeling. The device can highly simulate the motion state of the reduction motion cable under the use condition to carry out the fatigue resistance test of the tested cable, and provides test data closer to the actual use condition for the fatigue life evaluation of the motion cable.
Description
Technical Field
The invention relates to the technical field of cable fatigue resistance tests, in particular to a motion cable test platform.
Background
The motion cable can be bent into various shapes under the use condition and is repeatedly bent along a certain motion track, so that the fatigue resistance of the motion cable needs to be tested and evaluated before use.
There has been the device that carries out bending test to the cable among the prior art, for example, utility model patent of publication No. CN206832595U discloses an electric wire bending test machine, will be tested the rear end tensioning of electric wire, and the front end of being tested the cable is passed between by two camber cylinder axles, and the cooperation of bypassing camber cylinder and anchor clamps drives anchor clamps by the carousel, makes the front end of being tested the electric wire constantly carry out the bending test repeatedly around two camber cylinders.
The utility model discloses a publication number CN 211401984U's utility model discloses a resistant test device that buckles of cable lays the cable in the standing groove in last folding block and the folding block down, and the front end intercommunication of going up folding block and folding block down has the pivot, through the people for inwards pulling on folding block and folding block down, makes the front end of going up folding block and folding block down rotate in pivot department to it is protruding forward, and then folds the cable, tests with the degree of buckling to the cable.
Notice No. CN 208607094U's utility model discloses a wire rod test mechanism of buckling through setting up device and the cable coil of buckling, buckles that the device includes through-hole post, wire groove, through-hole, pivot and motor, fixes the cable on the cable coil in the wire groove of the device of buckling, drives pivot forward and backward rotation through starter motor, drives through-hole post forward and backward movement simultaneously to this resistant degree of buckling of inspection cable.
In the testing process of the testing device, the motion state of the tested cable is limited by the design structure of the device, the motion form is single, the motion trail is an ideal geometric curve, the difference between the motion state of the tested cable and the motion state of the tested cable in the actual use working condition is far away, the motion state of the tested cable in the use working condition cannot be simulated, and therefore the testing data close to the actual use working condition cannot be provided for fatigue life evaluation of the tested cable.
Disclosure of Invention
The invention aims to provide a motion cable test platform which can simulate the motion state of a motion cable under the working condition of use to carry out fatigue resistance test on the motion cable so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: a motion cable test platform comprising: the transmission rod is driven to rotate back and forth around the axis of the transmission rod; the swinging rod is arranged on the transmission rod and moves synchronously with the transmission rod, and the relative position of the swinging rod and the transmission rod can be adjusted; the limiting piece is arranged on the swinging rod and moves synchronously with the swinging rod, the relative position of the limiting piece and the swinging rod can be adjusted, and the limiting piece is used for the tested cable to pass through and clamp the tested cable; the bracket is used for connecting and fixing the end part of the tested cable; the relative position distribution between the connection point of the tested cable and the bracket and the clamping point of the limiting part and the tested cable is determined according to a motion state model of the use working condition of the motion cable constructed based on three-dimensional scanning reverse modeling.
Preferably, the device further comprises a fixed sliding block, the fixed sliding block is arranged on the transmission rod in a sliding mode along the axial direction of the transmission rod, and the swinging rod is connected with the fixed sliding block.
Preferably, the fixed slide block is rotatably arranged on the transmission rod along the circumferential direction of the transmission rod.
Preferably, the oscillating lever is arranged at an angle to the transmission lever.
Preferably, the limiting member is slidably provided on the swing lever in the axial direction of the swing lever and rotatably provided on the swing lever in the circumferential direction of the swing lever.
Preferably, the limiting part comprises a limiting slider movably arranged on the oscillating rod, a limiting plate arranged on the limiting slider along the radial direction of the oscillating rod, and a clamping part arranged on the limiting plate along the radial direction of the oscillating rod in a sliding manner, wherein the clamping part is used for a tested cable to pass through and clamping the tested cable.
Preferably, the clamping piece includes centre gripping slider and clamp, and the centre gripping slider can be located the limiting plate along the radial gliding of swinging arms on, and the inside through-hole that is formed with the confession by the test cable and passes that link up of centre gripping slider, and the clamp is located in the through-hole and the centre gripping by the test cable.
Preferably, the limiting plate is provided with a limiting groove which penetrates through the limiting plate along the axial direction of the oscillating rod and extends along the radial direction of the oscillating rod, and the clamping piece is slidably arranged in the limiting groove.
Preferably, the support is a telescopic rod which can be extended and retracted along the axial direction.
Preferably, the method for determining the motion state model of the use condition of the motion cable based on the three-dimensional scanning reverse modeling comprises the following steps: three-dimensional scanning is carried out on the wiring condition and the motion track of the motion cable on the site of the use working condition of the motion cable, point cloud data are obtained, and a motion state model of the use working condition of the motion cable is constructed by utilizing the point cloud data; and extracting the three-dimensional coordinates of each controlled point of the motion cable from the motion state model of the use working condition of the motion cable, so that the relative position distribution between the connecting point of the tested cable and the bracket and the clamping point of the limiting part and the tested cable is matched with the three-dimensional coordinates of each controlled point.
Compared with the prior art, the invention has the remarkable progress that:
the relative position distribution between controlled points (including connection points of the tested cable and the bracket, and clamping points of the limiting piece and the tested cable) of the tested cable can be adjusted by adjusting the relative positions of the swinging rod and the transmission rod and the relative positions of the limiting piece and the swinging rod; the relative position distribution between the connection point of the tested cable and the bracket and the clamping point of the limiting piece and the tested cable, the motion state of the motion cable under the use working condition can be accurately copied according to the motion state model of the use working condition of the motion cable constructed on the basis of the three-dimensional scanning reverse modeling, the relative position distribution of all controlled points of the tested cable is adjusted and determined according to the model, the distribution of the wiring controlled point positions of the tested cables can be matched with the distribution of the controlled point positions of the moving cables under the actual use working condition and the moving state, therefore, the fatigue resistance test of the tested cable is carried out by highly simulating the motion state of the reduced motion cable on the motion cable test platform under the use condition, and test data close to the actual use condition can be provided for the fatigue life evaluation of the motion cable.
Drawings
Fig. 1 is a schematic structural diagram of a motion cable test platform according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
FIG. 3 is a schematic step diagram of building a motion state model of a motion cable using condition based on three-dimensional scanning reverse modeling in the embodiment of the present invention.
FIG. 4 is a schematic diagram of a motion state model of a motion cable using a working condition according to an embodiment of the present invention.
Wherein the reference numerals are as follows:
1 drive rod
2 oscillating lever
3 position limiting part
31 limiting slide block
32 limiting plate
321 spacing groove
33 clamping piece
331 clamping slide block
332 through hole
4 support
5 tested cable
6 fixed sliding block
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
One embodiment of the motion cable test platform of the present invention is shown in fig. 1-4.
Referring to fig. 1, the motion cable test platform of the present embodiment includes a transmission rod 1, a swing rod 2, a limiting member 3, and a bracket 4.
Wherein the transmission rod 1 is driven to rotate back and forth around the axis of the transmission rod. Preferably, the transmission rod 1 can be connected to a driving member (not shown in the figures) by which the transmission rod 1 is driven to rotate back and forth about the axis of the transmission rod 1 itself. The form of the drive member is not limited, and for example, an electric motor may be used.
The swing rod 2 is arranged on the transmission rod 1, the swing rod 2 moves synchronously with the transmission rod 1, and the relative position of the swing rod 2 and the transmission rod 1 can be adjusted. After the relative position of the swing rod 2 and the transmission rod 1 is adjusted to the right position, the swing rod 2 and the transmission rod 1 are fixed, so that the swing rod 2 and the transmission rod 1 keep relative position relation and move synchronously.
The limiting piece 3 is arranged on the swing rod 2, the limiting piece 3 moves synchronously with the swing rod 2, and the relative position of the limiting piece 3 and the swing rod 2 is adjustable. After the relative position of the limiting member 3 and the swing rod 2 is adjusted to the right position, the limiting member 3 and the swing rod 2 are fixed, so that the limiting member 3 and the swing rod 2 keep relative position relation and move synchronously. The limiting piece 3 is used for the tested cable 5 to pass through and clamp the tested cable 5, and the clamping point of the limiting piece 3 and the tested cable 5 forms a controlled point of the tested cable 5. In this embodiment, the plurality of limiting members 3 are provided, the tested cable 5 sequentially passes through the plurality of limiting members 3, and each limiting member 3 clamps the tested cable 5 at a plurality of spaced positions on the tested cable 5, so as to form a plurality of clamping points of the limiting members 3 and the tested cable 5, which are also controlled points of the plurality of tested cables 5. The number of the limiting members 3 is not limited, and the design can be performed according to the number of the controlled points of the motion cable in the motion state under the use working condition.
The bracket 4 is used for connecting and fixing the end of the tested cable 5. In this embodiment, both ends of the cable 5 to be tested are connected to the same position on the stand 4. The connection point of the tested cable 5 to the bracket 4 also forms a controlled point of the tested cable 5.
By adjusting the relative position of the swing rod 2 and the transmission rod 1 and the relative position of the limiting member 3 and the swing rod 2, the relative position distribution between the controlled points of the tested cable 5 (including the connection point of the tested cable 5 and the bracket 4 and the clamping point of the limiting member 3 and the tested cable 5) can be adjusted. When the tested cable 5 passes through the limiting part 3 and is clamped by the limiting part 3, the end part of the tested cable 5 is fixedly connected on the bracket 4, the relative position of the swing rod 2 and the transmission rod 1 is adjusted to be in place and fixed, and the relative position of the limiting part 3 and the swing rod 2 is adjusted to be in place and fixed, the relative position distribution (including the three-dimensional coordinates of each controlled point and the cable length between adjacent controlled points on the tested cable 5) between each controlled point of the tested cable 5 is determined, namely the wiring state of the tested cable 5 is determined. At this time, the transmission rod 1 is driven to rotate back and forth around the axis thereof, so as to drive the swinging rod 2, the limiting member 3 and the tested cable 5 to synchronously swing back and forth, thereby performing the fatigue resistance test of the tested cable 5 in a determined wiring state.
In this embodiment, the relative position distribution between the connection point of the tested cable 5 and the bracket 4 and the clamping point of the limiting member 3 and the tested cable 5, that is, the relative position distribution between the controlled points of the tested cable 5, that is, the wiring state of the tested cable 5, is determined according to the motion state model of the use condition of the motion cable constructed based on the three-dimensional scanning reverse modeling. The motion state model of the motion cable under the use condition, which is constructed based on three-dimensional scanning reverse modeling, can accurately replicate the motion state of the motion cable under the use condition, the distribution of the relative positions of all controlled points of the tested cable 5 is adjusted and determined according to the model, the distribution of the wiring controlled points of the tested cable 5 is identical to the distribution of the controlled points of the motion cable under the motion state under the actual use condition, so that the motion state under the use condition of the motion cable is highly simulated and reduced on the motion cable test platform of the embodiment to perform fatigue resistance test on the tested cable 5, and test data close to the actual use condition can be provided for fatigue life evaluation of the motion cable.
Referring to fig. 1, preferably, the moving cable test platform of the present embodiment further includes a fixed slider 6, the fixed slider 6 is slidably disposed on the transmission rod 1 along the axial direction of the transmission rod 1, and the swing rod 2 is connected to the fixed slider 6. When the fixed sliding block 6 slides on the transmission rod 1 along the axial direction of the transmission rod 1, the fixed sliding block drives the swing rod 2 to synchronously move along with the fixed sliding block, so that the relative position of the swing rod 2 and the transmission rod 1 in the axial direction of the transmission rod 1 can be adjusted. Further, the fixed sliding block 6 can be arranged on the transmission rod 1 in a manner of rotating along the circumferential direction of the transmission rod 1, and the fixed sliding block 6 drives the swing rod 2 to synchronously move along with the transmission rod 1 when rotating along the circumferential direction of the transmission rod 1 on the transmission rod 1, so that the relative position of the swing rod 2 and the transmission rod 1 in the circumferential direction of the transmission rod 1 can be adjusted. Hereby it is achieved that the relative position of the swing lever 2 and the drive lever 1 is adjustable in both axial and circumferential dimensions of the drive lever 1.
In this embodiment, one end of the swing rod 2 is fixedly connected with the fixed slider 6, the other end of the swing rod 2 is suspended, and the relative fixation between the swing rod 2 and the transmission rod 1 is realized by fixing the fixed slider 6 and the transmission rod 1. The fixing manner of the fixed slider 6 and the transmission rod 1 is not limited, for example, the fixed slider 6 can be fixed on the transmission rod 1 by screws, and when the relative position of the swing rod 2 and the transmission rod 1 needs to be adjusted, the screws are loosened, so that the fixed slider 6 can move relative to the transmission rod 1.
In this embodiment, the oscillating lever 2 is preferably arranged at an angle to the transmission lever 1. In order to facilitate the adjustment of the three-dimensional coordinates of the controlled points of the test cable 5, the axis of the swing lever 2 is preferably perpendicular to the axis of the transmission lever 1.
Referring to fig. 1 and 2, in the present embodiment, preferably, the limiting member 3 is slidably provided on the swing lever 2 in the axial direction of the swing lever 2 and rotatably provided on the swing lever 2 in the circumferential direction of the swing lever 2. Therefore, the relative position of the limiting piece 3 and the swinging rod 2 can be adjusted in two dimensions of the axial direction and the circumferential direction of the swinging rod 2. Because the axis of the swing rod 2 and the axis of the transmission rod 1 form an angle (such as perpendicular), the relative position of the swing rod 2 and the transmission rod 1 can be adjusted in two axial and circumferential dimensions of the transmission rod 1, and the relative position of the limiting piece 3 and the swing rod 2 can be adjusted in two axial and circumferential dimensions of the swing rod 2, the adjustment of the space three-dimensional coordinate of the clamping point of the limiting piece 3 and the tested cable 5 can be realized.
Preferably, referring to fig. 2, in the present embodiment, the limiting member 3 includes a limiting slider 31, a limiting plate 32 and a clamping member 33. The limiting slide block 31 is movably arranged on the swing rod 2, the limiting plate 32 is fixedly arranged on the limiting slide block 31 along the radial direction of the swing rod 2, the clamping piece 33 can be arranged on the limiting plate 32 along the radial direction of the swing rod 2 in a sliding manner, and the clamping piece 33 is used for the tested cable 5 to pass through and clamps the tested cable 5. Therefore, in addition to the relative position adjustment of the swing lever 2 and the transmission rod 1 and the relative position adjustment of the limiting member 3 and the swing lever 2, the clamping member 33 can slide on the limiting plate 32 in the radial direction of the swing lever 2 to adjust the relative position between the clamping point of the limiting member 3 and the tested cable 5 and the swing lever 2, so as to realize the accurate adjustment of the spatial three-dimensional coordinate of the clamping point of the limiting member 3 and the tested cable 5. After the relative positions of the clamping piece 33 and the limiting plate 32 in the radial direction of the swing rod 2 are adjusted to the right position, the clamping piece 33 and the limiting plate 32 are fixed, so that the clamping piece 33 drives the tested cable 5 to keep relative position relation with the limiting plate 32 and the limiting slide block 31 to move synchronously.
In this embodiment, the relative fixation between the limiting member 3 and the swing rod 2 is realized by fixing the limiting slider 31 and the swing rod 2. The fixing manner of the limiting slider 31 and the swing rod 2 is not limited, for example, the limiting slider 31 may be fixed on the swing rod 2 by screws, and when the relative position of the limiting member 3 and the swing rod 2 needs to be adjusted, the screws are loosened, so that the limiting slider 31 can move relative to the swing rod 2.
Preferably, in this embodiment, the clamping member 33 includes a clamping slider 331 and a clamp (not shown). The holding slider 331 is slidably provided on the stopper plate 32 in the radial direction of the swing lever 2, and the holding member 33 is slid on the stopper plate 32 in the radial direction of the swing lever 2 by the holding slider 331 sliding on the stopper plate 32 in the radial direction of the swing lever 2. A through hole 332 for the tested cable 5 to pass through is formed in the clamping slide block 331, and the clamp is fixedly arranged in the through hole 332 and clamps the tested cable 5 to prevent the tested cable 5 from sliding, so that the clamping piece 33 is used for the tested cable 5 to pass through and clamping the tested cable 5. The structure of the clamp is not limited as long as the tested cable 5 can be clamped and fixed in the through hole 332 of the clamping slider 331.
In this embodiment, the clamping member 33 and the limiting plate 32 are fixed to each other by the clamping slider 331 and the limiting plate 32. The fixing manner of the clamping slider 331 and the limiting plate 32 is not limited, for example, the clamping slider 331 can be fixed on the limiting plate 32 by screws, and when the relative position of the clamping member 33 and the limiting plate 32 needs to be adjusted, the screws are loosened, so that the clamping slider 331 can move relative to the limiting plate 32.
Preferably, in the present embodiment, the limiting plate 32 is provided with a limiting groove 321, the limiting groove 321 penetrates through the limiting plate 32 along the axial direction of the swing rod 2, the limiting groove 321 extends on the limiting plate 32 along the radial direction of the swing rod 2, and the clamping slider 331 of the clamping member 33 is slidably disposed in the limiting groove 321.
In this embodiment, in order to further facilitate the adjustment of the distribution of the relative positions between the connection point of the tested cable 5 and the bracket 4 and the clamping point of the limiting member 3 and the tested cable 5, preferably, the bracket 4 is an axially retractable telescopic rod, and the three-dimensional coordinates of the connection point of the tested cable 5 and the bracket 4 can be adjusted by adjusting the retractable state of the telescopic rod, so as to adjust the distribution of the relative positions between the connection point of the tested cable 5 and the bracket 4 and the clamping point of the limiting member 3 and the tested cable 5. In this embodiment, the relative position relationship between the bracket 4 and the transmission rod 1 is not limited, and preferably, the axis of the bracket 4 is perpendicular to the axis of the transmission rod 1 and does not intersect with the axis.
In this embodiment, the method for determining the motion state model of the use condition of the motion cable based on the three-dimensional scanning reverse modeling of the motion cable, which is constructed based on the connection point between the tested cable 5 and the bracket 4 and the relative position distribution between the limiting member 3 and the clamping point of the tested cable 5, is as follows: three-dimensional scanning is carried out on the wiring condition and the motion track of the motion cable on the site of the use working condition of the motion cable, point cloud data are obtained, and a motion state model of the use working condition of the motion cable is constructed by utilizing the point cloud data; and extracting the three-dimensional coordinates of each controlled point of the motion cable from the motion state model of the use condition of the motion cable, so that the relative position distribution between the connecting point of the tested cable 5 and the bracket 4 and the clamping point of the limiting part 3 and the tested cable 5 is matched with the three-dimensional coordinates of each controlled point. Referring to fig. 3, the following steps may be specifically included.
And step S1, in the working condition site of the moving cable, rapidly and three-dimensionally scanning the wiring condition and the moving track of the moving cable in a multi-angle and high-precision manner by using a three-dimensional laser scanner to obtain point cloud data. The method comprises the following steps: step S101, measurement preparation; s102, erecting a three-dimensional laser scanning instrument and configuring scanning parameters; step S103, pre-scanning; step S104, fine scanning.
And step S2, constructing a motion state model of the motion cable using working condition by using the point cloud data. The method comprises the following steps of utilizing scanning simulation software to splice, unify and remove dryness of multi-station point cloud data, importing the processed point cloud data into modeling software, and constructing a motion state model of a motion cable using working condition, wherein the method specifically comprises the following steps: step S201, point cloud difficulty processing; step S202, polygon editing; step S203, a precise curved surface stage; and step S204, forward and reverse combination modeling design. Fig. 4 shows a schematic diagram of a motion state model of the use condition of the motion cable obtained by construction, in which A, B, C and D four motion cable controlled points are shown, wherein the controlled points A, B and C correspond to the clamping points of the limiting members 3 and the tested cable 5, and the clamping points of the limiting members 3 and the tested cable 5 correspond to the controlled points A, B and C one by one; the controlled point D corresponds to the connection point of the cable 5 under test with the cradle 4. The cable length between adjacent controlled points on the tested cable 5 coincides with the cable length between controlled points A, B, C and D in the model.
Step S3, extracting position data of each controlled point A, B, C and D of the motion cable from the motion state model of the use condition of the motion cable, and converting the position data into three-dimensional coordinates, taking the controlled point D corresponding to the connection point of the tested cable 5 and the bracket 4 as the origin of the three-dimensional coordinate system, obtaining three-dimensional coordinate values of other controlled points A, B and C, and the cable length between the controlled points, and further obtaining the swing angle value of the complete motion of the motion cable under the use condition of the motion cable from the motion state model of the use condition of the motion cable. Accordingly, the tested cable 5 is inserted and connected on the motion cable test platform of the embodiment, the tested cable 5 is fixedly connected with the bracket 4 and the clamp of the limiting piece 3, and the cable length between the connection point of the tested cable 5 and the bracket 4 and the cable length between the clamp of the limiting piece 3 and the clamping point of the tested cable 5 are consistent with the cable length between the controlled points A, B, C and D in the motion state model of the motion cable using working condition; the position (namely the original point position) of the connecting point of the tested cable 5 and the bracket 4 is adjusted by adjusting the telescopic state of the bracket 4 (telescopic rod), the relative position of the swinging rod 2 and the transmission rod 1 is adjusted by moving the fixed slide block 6, the relative position of the limiting block 3 and the swinging rod 2 is adjusted by moving the limiting slide block 31 of each limiting block 3, the relative position of the clamping block 33 and the limiting plate 32 is adjusted by moving the clamping slide block 331 of the clamping block 33 in the limiting groove 321 of the limiting plate 32, and the relative position distribution between the connecting point of the tested cable 5 and the bracket 4 and the clamping point of the limiting block 3 and the tested cable 5 is consistent with the three-dimensional coordinates of each controlled point A, B, C and D in the motion state model of the motion cable using working conditions.
After the relative position distribution between the connection point of the tested cable 5 and the bracket 4 and the clamping point of the limiting member 3 and the tested cable 5 is adjusted in place, the bracket 4 (telescopic rod) is kept in the current telescopic state, the fixed slide block 6 is fixed with the transmission rod 1, the limiting slide block 31 is fixed with the swing rod 2, and the clamping slide block 331 is fixed with the limiting plate 32. And then, determining test conditions according to the swing angle value of the complete movement of the moving cable under the use condition of the moving cable obtained from the moving state model of the use condition of the moving cable, and performing a test. Taking the swing angle value of the complete movement of the moving cable under the use working condition of the moving cable as an example, determining the test conditions as follows: the driving piece loads the transmission rod 1, so that the transmission rod 1 swings back and forth around the axis of the transmission rod 1 by an angle of 75 degrees, and the opening and closing of the transmission rod 1 once (namely +/-75 degrees) is a cycle, each cycle is 8 seconds, the state of the tested cable 5 is inspected after 20000 cycles, and no visible crack exists.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114152520A (en) * | 2021-12-24 | 2022-03-08 | 沈阳兴华航空电器有限责任公司 | Novel folding cable test equipment |
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| US20020059834A1 (en) * | 2000-11-21 | 2002-05-23 | Sumitomo Wiring Systems, Ltd. | Bend test device for an electrical cable or wire harness |
| CN206223578U (en) * | 2016-12-06 | 2017-06-06 | 北京金风科创风电设备有限公司 | Cable twists fatigue test device |
| CN208537285U (en) * | 2018-07-16 | 2019-02-22 | 江西民龙线缆有限公司 | A kind of cable Flexing Apparatus angle adjusting mechanism |
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| US20210056245A1 (en) * | 2018-02-20 | 2021-02-25 | Siemens Industry Software Inc. | Method and system for performing a simulation of a retraction cable motion |
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| CN215640661U (en) * | 2021-08-03 | 2022-01-25 | 安图实验仪器(郑州)有限公司 | Multifunctional wire harness fatigue test platform |
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| US20020059834A1 (en) * | 2000-11-21 | 2002-05-23 | Sumitomo Wiring Systems, Ltd. | Bend test device for an electrical cable or wire harness |
| CN206223578U (en) * | 2016-12-06 | 2017-06-06 | 北京金风科创风电设备有限公司 | Cable twists fatigue test device |
| US20210056245A1 (en) * | 2018-02-20 | 2021-02-25 | Siemens Industry Software Inc. | Method and system for performing a simulation of a retraction cable motion |
| CN208537285U (en) * | 2018-07-16 | 2019-02-22 | 江西民龙线缆有限公司 | A kind of cable Flexing Apparatus angle adjusting mechanism |
| CN210513672U (en) * | 2019-11-05 | 2020-05-12 | 工业和信息化部电子第五研究所华东分所 | Detection device |
| CN112666015A (en) * | 2020-12-21 | 2021-04-16 | 北京中车赛德铁道电气科技有限公司 | Full-automatic testing device for fatigue test of high-voltage cable |
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| CN114152520A (en) * | 2021-12-24 | 2022-03-08 | 沈阳兴华航空电器有限责任公司 | Novel folding cable test equipment |
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| CN113324861B (en) | 2023-03-14 |
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