CN112857282A - Framework three-dimensional detection auxiliary device and framework three-dimensional detection method - Google Patents
Framework three-dimensional detection auxiliary device and framework three-dimensional detection method Download PDFInfo
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- CN112857282A CN112857282A CN202110125875.4A CN202110125875A CN112857282A CN 112857282 A CN112857282 A CN 112857282A CN 202110125875 A CN202110125875 A CN 202110125875A CN 112857282 A CN112857282 A CN 112857282A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
Abstract
The invention provides a framework three-dimensional detection auxiliary device and a framework three-dimensional detection method. The framework three-dimensional detection auxiliary device comprises a mandrel, shaft sleeves and positioning blocks, wherein each shaft sleeve is hinged with the positioning block which can obliquely swing towards the radial center line of the mandrel; the positioning block is provided with a datum plane for collecting points and constructing a plane and a datum hole for collecting circles and constructing points of the three-coordinate measuring machine, and the points constructed through the datum hole can be projected onto the plane constructed through the datum plane. Compared with the prior art, the framework three-dimensional detection auxiliary device provided by the invention can be used for self-adaptive matching fine adjustment according to the deformation condition of the herringbone spring mounting seat, and then the central reference of the framework is calculated and obtained by acquiring the reference surface and the reference of the reference hole through a three-coordinate measuring machine, so that the three-dimensional detection of the whole framework is completed.
Description
Technical Field
The invention relates to the technical field of detection of herringbone spring structure frameworks of railway vehicles, in particular to a framework three-dimensional detection auxiliary device and a framework three-dimensional detection method.
Background
The herringbone spring structure framework is a vehicle type which is not processed integrally after the framework is welded. When the design drawing requires that the framework is welded and then three-coordinate detection is carried out, a herringbone spring mounting seat is required to establish a framework center reference, but the herringbone spring mounting seat is a complex special-shaped structure, and the existing three-coordinate measuring machine cannot directly establish the framework center reference on a herringbone spring mounting seat sampling point, so that the difficulty is brought to detection work.
Disclosure of Invention
The invention aims to provide a framework three-dimensional detection auxiliary device and a framework three-dimensional detection method, and solves the problem that a framework center reference cannot be established in the framework three-dimensional detection of a herringbone spring structure.
The technical scheme of the invention is as follows: a framework three-dimensional detection auxiliary device comprises a mandrel, shaft sleeves and positioning blocks, wherein the shaft sleeves are telescopically sleeved at two ends of the mandrel, the positioning blocks are matched with a framework in shape, and each shaft sleeve is hinged with the positioning block which can obliquely swing towards the radial central line of the mandrel;
the positioning block is provided with a datum plane for collecting points and constructing a plane and a datum hole for collecting circles and constructing points of the three-coordinate measuring machine, and the points constructed through the datum hole can be projected onto the plane constructed through the datum plane. .
In the scheme, the shaft sleeve can axially stretch and retract and can obliquely swing, the shaft sleeve can be adaptively matched and finely adjusted according to the deformation condition of the herringbone spring mounting seat, and the center reference of the framework is calculated and obtained by acquiring the reference surface and the reference hole through the three-coordinate measuring machine, so that the three-dimensional detection of the whole framework is completed.
Preferably, the positioning block is provided with two reference surfaces, the two reference surfaces are symmetrical relative to the axial center line of the mandrel, and the reference surfaces are provided with reference holes.
Two axially symmetrical reference surfaces are designed, so that the direction of the framework three-dimensional detection auxiliary device placed in the herringbone spring mounting seat is not limited during measurement, and the placing difficulty is reduced.
Preferably, the shaft sleeve is provided with a key groove, the mandrel is provided with a guide key, the guide key is matched with the key groove and has a gap, and the gap is in the axial direction of the mandrel.
Designing a gap to enable the shaft sleeve to be capable of self-adaptively axially stretching, wherein the axial stretching is carried out rapidly and unimpededly; the matching relation of the key groove and the guide key ensures that the axial extension of the shaft sleeve has guidance.
Preferably, the guide key is connected with the mandrel through a first socket head cap screw.
The guide key is detachably connected to the mandrel, and the size of the guide key can be selected according to actual use requirements, so that gaps and adjustment quantities of different sizes can be obtained.
Preferably, the middle part of the mandrel is provided with a plurality of nuts, the nuts respectively correspond to the shaft sleeves at the two ends, a spring is arranged between the nut and the shaft sleeve, and the spring is sleeved on the mandrel.
The spring can realize the elastic expansion of the shaft sleeve, so that the positioning block is tightly attached to the herringbone spring mounting seat, and the establishment of a detection reference is facilitated.
Preferably, a gasket capable of adjusting the pre-tightening force of the spring is arranged between the nut and the spring, and the gasket is sleeved on the mandrel.
Through the pretightning force of packing ring adjusting spring, make the commonality that improves auxiliary device, satisfy the detection demand under the different conditions.
Preferably, an end cover is arranged on the shaft sleeve and is hinged with the shaft sleeve.
The position precision articulated with the axle sleeve is less than the surface of locating piece, consequently, increases the end cover, and its machining precision is less than the locating piece, compares like this also to design on the locating piece with the articulated mount pad of axle sleeve, and processing cost is lower, and the processing degree of difficulty is also low, and the maintenance cost is also low.
Preferably, the positioning block is provided with mounting support legs matched with the herringbone spring mounting seats, and the mounting support legs vertically extend along the positioning block.
The mounting support legs are matched with the herringbone spring mounting seats, so that the stability and close fitting of the auxiliary device can be further guaranteed.
The invention also provides a framework three-dimensional detection method which is carried out by adopting a three-coordinate measuring machine and the framework three-dimensional detection auxiliary device and comprises the following steps:
placing a component on a detection table of a three-coordinate measuring machine with the reverse side of the component facing upwards, and respectively placing the framework three-dimensional detection auxiliary devices in four herringbone spring mounting seats of the framework; the framework three-dimensional detection auxiliary device is automatically adjusted by means of self weight, so that the positioning block is attached to the herringbone spring mounting seat;
secondly, a point construction plane P1 is firstly acquired on the datum planes of two positioning blocks of the same framework three-dimensional detection auxiliary device through a three-coordinate measuring machine, circles are acquired on datum holes and projected onto the plane P1, so that a point D1 and a point D2 are constructed, and a central point C1 is constructed in a mode of using a point D1 and a point D2;
constructing a center point C2, a center point C3 and a center point C4 on the framework three-dimensional detection auxiliary device at other three positions according to the steps, wherein the center point C1 and the center point C2 are on the same side in the longitudinal direction of the framework; the center point C3 and the center point C4 are on the same side of the framework in the longitudinal direction;
thirdly, constructing a central plane H by using a three-coordinate measuring machine through a central point C1, a central point C2, a central point C3 and a central point C4;
step four, respectively constructing a central point C5 by using a central point C1 and a central point C2 through a three-coordinate measuring machine; a center point C6 is constructed by using a center point C3 and a center point C4, a center point C7 is constructed by using a center point C1 and a center point C3, and a center point C8 is constructed by using a center point C2 and a center point C4;
step five, respectively connecting a central point C5 with a central point C6 through a three-coordinate measuring machine to form a line L5, connecting a central point C7 with a central point C8 to form a line L6, projecting the line L5 and the line L6 onto a central plane I, and obtaining an intersection point formed after projection as a framework center K;
and step six, completing the establishment of a detection reference, and finally completing three-coordinate detection by adopting points on the framework.
Preferably, in the fourth step, a three-coordinate measuring machine is respectively used to connect the center point C1 with the center point C2 to form a line L1, connect the center point C3 with the center point C4 to form a line L2, connect the center point C1 with the center point C3 to form a line L3, and connect the center point C2 with the center point C4 to form a line L4; the center point C5 is projected onto the line L1, the center point C6 is projected onto the line L2, the center point C7 is projected onto the line L3, and the center point C8 is projected onto the line L4; the line L1, line L2, line L3, and line L4 form the central plane I.
Compared with the related technology, the invention has the beneficial effects that: the problem that the center reference of the framework cannot be established in the three-dimensional detection of the herringbone spring structure framework is solved; the device has high design and manufacturing precision, can accurately position a detection reference, can smoothly carry out three-dimensional detection on the human character spring structural framework, and can well control detection errors; reliable dead weight location in the installation, easy operation is convenient, and the device has better wearability, stability, and life is longer.
Drawings
FIG. 1 is a schematic structural diagram of a three-dimensional testing aid for a frame according to the present invention;
FIG. 2 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along C-C of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along D-D of FIG. 1;
FIG. 5 is a schematic view of the framework of the present invention before installation;
FIG. 6 is a schematic view (I) of the framework three-dimensional inspection auxiliary device provided by the invention after installation;
fig. 7 is a working schematic diagram (two) of the framework three-dimensional detection auxiliary device provided by the invention after installation.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
As shown in fig. 1, the three-dimensional frame detection assisting device 2 provided by this embodiment includes a mandrel 5, shaft sleeves 14 telescopically sleeved at two ends of the mandrel 5, and a positioning block 4 with a shape matching with a frame. The positioning block 4 is provided with mounting support legs 19 matched with the herringbone spring mounting seats, and the mounting support legs 19 vertically extend along the positioning block 4. The positioning blocks 4 at the two ends are symmetrical relative to the radial central line H of the mandrel 5.
As shown in fig. 2 and 4, the positioning block 4 is provided with two reference surfaces 15, the two reference surfaces 15 are symmetrical with respect to an axial center line M of the mandrel 5, and the reference surfaces 15 are provided with reference holes 16.
The positioning hole 4 is made of a forged 38CrMoA1 material and has a symmetrical hollow structure, and the inclined plane position in contact with the framework is subjected to nitriding treatment, so that the abrasion resistance and stability of the positioning part are guaranteed while the weight is reduced. And a high-precision reference hole 16 and a reference plane 15 are processed on the positioning block 4 and are used for sampling points of a three-coordinate measuring machine.
As shown in fig. 6 and 7, the inclined surface of the positioning block 4 is matched with the end surface of the chevron spring mounting seat 3, the mounting leg 19 vertically extends into the chevron spring mounting seat 3, and the reference surface 15 is located outside the chevron spring mounting seat 3.
As shown in fig. 1 and 2, each shaft sleeve 14 is hinged to the positioning block 4 through the end cover 12, and the positioning block 4 and the end cover 12 are matched by using phi 48H8/f 7. One end of the sleeve 14 is a through sleeve with a keyway 18. The mandrel 5 is sleeved in the sleeve, and a guide key 9 matched with the key groove 18 is arranged on the mandrel 5. As shown in fig. 3, the guide key 9 is connected to the spindle 5 by a first socket head cap screw. As shown in fig. 2, the guide key 9 is fitted with the key groove 18 with a clearance in the axial direction of the spindle 5. The guide key 9 and the key groove 18 are matched by 12H 8/H8. The mandrel 5 and the shaft sleeve 14 are matched by phi 31H8/e 8.
As shown in fig. 2, the other end (the end far from the mandrel 5) of the shaft sleeve 14 is provided with a protruding semicircular boss. Similarly, the end cover 12 is provided with a semicircular boss attached to the shaft sleeve 14, the two semicircular bosses are attached to each other, and the two semicircular bosses are hinged to each other through the bolt assembly 13. This hinged non-tight fit requires that the end cap 12 be able to swing on its own along the hinge point.
As shown in fig. 2, the end cap 12 is fixed to the positioning block 4 by a second socket head cap screw 11. In this way, the positioning blocks 4 at the two ends of the mandrel 5 can simultaneously swing along the axial line of the bolt assembly 13 to the radial central line H of the mandrel 5 in an inclined manner, so as to realize self-adaptive fine adjustment with the shape of the herringbone spring mounting seat 3.
As shown in fig. 1 and 2, a plurality of nuts 7 are arranged in the middle of the mandrel 5, the plurality of nuts 7 correspond to the positions of the shaft sleeves 14 at the two ends, a spring 6 is arranged between the nut 7 and the shaft sleeve 14, and the spring 6 is sleeved on the mandrel 5. Further, a gasket 8 capable of adjusting the pre-tightening force of the spring 6 is arranged between the nut 7 and the spring 6, and the gasket 8 is sleeved on the mandrel 5. Namely, the middle part of the mandrel 5 is threaded with fine-tooth external threads, the nut 7 is a fine-tooth round nut, two super shaft sleeves 14 are respectively arranged on the mandrel 5, and the washers 8 are locked to adjust the pretightening force of the spring 6.
The connection parts of all the parts in the detection auxiliary device provided by the invention are symmetrically designed with high precision, so that the whole device is always ensured to be in the same straight line in the telescopic process. The position error of the end faces of the two positioning blocks 4 needs to be adjusted within +/-0.05 during the assembly of the whole device, and finally the precision error of the device in the stretching and rotating processes is guaranteed to be within 0.1. The nut 7 adopts an M33 multiplied by 1.5 fine thread structure, so that balance and looseness prevention of the device during expansion and contraction are guaranteed.
As shown in fig. 2, 5, and 6, when the frame 1 is three-dimensionally inspected, the chevron spring mount 3 is directed upward, the frame three-dimensional inspection assistance device 2 is placed on the chevron spring mount 3, and the positioning block 4 is tilted toward the radial center line H of the spindle 5 by the self-weight of the frame three-dimensional inspection assistance device 2 (as shown in fig. 6). Meanwhile, under the thrust action of the end face of the herringbone spring mounting seat 3, the positioning block 4 displaces towards the radial center line H direction of the mandrel 5, and the displacement generates guiding displacement through the sliding of the guiding key 9 in the key groove 18. Therefore, automatic extension and contraction of the mandrel 5 and automatic rotation of the positioning block 4 are realized, and the auxiliary device 2 is tightly attached to the herringbone spring mounting seat 3.
The three-coordinate measuring machine constructs the X/Y/Z central point of the framework herringbone spring mounting seat 3 by collecting the reference surface 15 on the positioning block 4 and the reference hole 16 on the positioning block, and then constructs the whole X/Y/Z detection reference of the framework 1 by the central points of the four herringbone spring mounting seats 3, so that the three-dimensional detection of the framework can be completed. The framework three-dimensional detection auxiliary device 2 can rapidly and accurately assist a three-coordinate measuring mechanism to make a framework detection reference, and realizes ZMC080 type framework three-dimensional detection.
As shown in fig. 6 and 7, the present invention further provides a three-dimensional framework detection method, which is performed by using a three-coordinate measuring machine and the three-dimensional framework detection auxiliary device, and comprises the following steps:
and S1, placing the component on a detection table of a three-coordinate measuring machine with the reverse side facing upwards, and placing the framework three-dimensional detection auxiliary device 2 in the four herringbone spring mounting seats 3 of the framework 1 respectively. The framework three-dimensional detection auxiliary device 2 is automatically adjusted by means of self weight, so that the positioning block 4 is attached to the herringbone spring mounting seat 3. Because the auxiliary device is a completely symmetrical structure, the auxiliary device can be placed in any direction.
S2, a three-dimensional measuring machine first forms a point construction plane P1 on the reference plane 15 of the two positioning blocks 4 of the three-dimensional inspection assistance device 1, forms a circle on the reference hole 16, and projects the circle onto the plane P1, thereby forming a point D1 and a point D2, and then forms a center point C1 in the center using a point D1 and a point D2.
Respectively constructing a point D3, a point D4, a plane P2 and a central point C2 on the framework three-dimensional detection auxiliary device 2 at other three positions according to the steps; constructing point D5, point D6, plane P3, and center point C3; point D7, point D8, plane P4, and center point C4 are constructed. Wherein the center point C1 and the center point C2 are on the same side of the framework 1 in the longitudinal direction; the center point C3 and the center point C4 are on the same side of the frame 1 in the longitudinal direction.
S3, a center plane H is constructed by the three-coordinate measuring machine using the center point C1, the center point C2, the center point C3, and the center point C4.
S4, respectively constructing a center point C5 by using a three-coordinate measuring machine and centering by using a center point C1 and a center point C2; center point C6 is constructed using center point C3 and center point C4, center point C7 is constructed using center point C1 and center point C3, and center point C8 is constructed using center point C2 and center point C4.
Respectively connecting a central point C1 with a central point C2 through a three-coordinate measuring machine to construct a line L1, connecting a central point C3 with a central point C4 to construct a line L2, connecting a central point C1 with a central point C3 to construct a line L3, and connecting a central point C2 with a central point C4 to construct a line L4; the center point C5 is projected onto the line L1, the center point C6 is projected onto the line L2, the center point C7 is projected onto the line L3, and the center point C8 is projected onto the line L4; the line L1, line L2, line L3, and line L4 form the central plane I.
And S5, respectively connecting a center point C5 with a center point C6 through a three-coordinate measuring machine to form a line L5, connecting a center point C7 with a center point C8 to form a line L6, projecting the line L5 and the line L6 onto a central plane I, and obtaining an intersection point formed after projection, namely a framework center K.
And S6, completing the establishment of a detection reference, and finally completing three-coordinate detection by adopting points on the framework.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A framework three-dimensional detection auxiliary device is characterized by comprising a mandrel (5), shaft sleeves (14) which are telescopically sleeved at two ends of the mandrel (5) and positioning blocks (4) of which the shapes are matched with a framework, wherein each shaft sleeve (14) is hinged with the positioning block (4) which can obliquely swing towards a radial central line (H) of the mandrel (5) simultaneously;
the positioning block (4) is provided with a datum plane (15) for collecting points and constructing a plane of the three-coordinate measuring machine and a datum hole (16) for collecting circles and constructing points, and points constructed through the datum hole (16) can be projected onto the plane constructed through the datum plane (15).
2. The frame three-dimensional detection auxiliary device according to claim 1, characterized in that two reference surfaces (15) are arranged on the positioning block (4), the two reference surfaces (15) are symmetrical with respect to the axial center line (M) of the mandrel (5), and a reference hole (16) is arranged on the reference surface (15).
3. The framework three-dimensional inspection auxiliary device according to claim 1, wherein the shaft sleeve (14) is provided with a key groove (18), the mandrel (5) is provided with a guide key (9), and the guide key (9) is matched with the key groove (18) and has a clearance which is in the axial direction of the mandrel (5).
4. A framed three-dimensional inspection aid according to claim 3, characterized in that the guide key (9) is connected to the spindle (5) by means of a first socket head cap screw (10).
5. The framework three-dimensional detection auxiliary device is characterized in that a plurality of nuts (7) are arranged in the middle of the mandrel (5), the nuts (7) correspond to the positions of the shaft sleeves (14) at the two ends respectively, a spring (6) is arranged between the nut (7) and the shaft sleeve (14), and the spring (6) is sleeved on the mandrel (5).
6. The framework three-dimensional detection auxiliary device is characterized in that a washer (8) capable of adjusting the pre-tightening force of the spring (6) is arranged between the nut (7) and the spring (6), and the washer (8) is sleeved on the mandrel (5).
7. The framed three-dimensional inspection aid according to any one of claims 1 to 6, wherein an end cap (12) is provided on the shaft sleeve (14), the end cap (12) being hinged to the shaft sleeve (4).
8. The framework three-dimensional detection auxiliary device according to any one of claims 1 to 6, wherein a mounting support leg (19) matched with the herringbone spring mounting seat is arranged on the positioning block (4), and the mounting support leg (19) extends vertically along the positioning block (4).
9. A framework three-dimensional inspection method using a three-dimensional measuring machine and the framework three-dimensional inspection assisting apparatus according to any one of claims 1 to 8, comprising:
placing a component on a detection table of a three-coordinate measuring machine with the reverse side of the component facing upwards, and respectively placing the framework three-dimensional detection auxiliary devices (2) in four herringbone spring mounting seats (3) of a framework (1); the framework three-dimensional detection auxiliary device (2) is automatically adjusted by means of self weight, so that the positioning block (4) is attached to the herringbone spring mounting seat (3);
secondly, a point construction plane P1 is firstly acquired on the datum plane (15) of two positioning blocks (4) of the same framework three-dimensional detection auxiliary device (1) through a three-coordinate measuring machine, a circle is acquired on a datum hole (16) and is projected onto the plane P1, so that a point D1 and a point D2 are constructed, and a central point C1 is constructed in a centering mode through the point D1 and the point D2;
constructing a center point C2, a center point C3 and a center point C4 on the framework three-dimensional detection auxiliary device (2) at other three positions according to the steps, wherein the center point C1 and the center point C2 are on the same side in the longitudinal direction of the framework (1); the center point C3 and the center point C4 are on the same side of the framework (1) in the longitudinal direction;
thirdly, constructing a central plane H by using a three-coordinate measuring machine through a central point C1, a central point C2, a central point C3 and a central point C4;
step four, respectively constructing a central point C5 by using a central point C1 and a central point C2 through a three-coordinate measuring machine; a center point C6 is constructed by using a center point C3 and a center point C4, a center point C7 is constructed by using a center point C1 and a center point C3, and a center point C8 is constructed by using a center point C2 and a center point C4;
step five, respectively connecting a central point C5 with a central point C6 through a three-coordinate measuring machine to form a line L5, connecting a central point C7 with a central point C8 to form a line L6, projecting the line L5 and the line L6 onto a central plane I, and obtaining an intersection point formed after projection as a framework center K;
and step six, completing the establishment of a detection reference, and finally completing three-coordinate detection by adopting points on the framework.
10. The framework three-dimensional inspection method of claim 9, wherein in the fourth step, a three-coordinate measuring machine is respectively used to connect the center point C1 with the center point C2 to form a line L1, connect the center point C3 with the center point C4 to form a line L2, connect the center point C1 with the center point C3 to form a line L3, and connect the center point C2 with the center point C4 to form a line L4; the center point C5 is projected onto the line L1, the center point C6 is projected onto the line L2, the center point C7 is projected onto the line L3, and the center point C8 is projected onto the line L4; the line L1, line L2, line L3, and line L4 form the central plane I.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199155A (en) * | 2021-12-09 | 2022-03-18 | 湖北文理学院 | Locomotive frame pull rod seat deformation measurement platform and method based on machine vision |
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| CN207875663U (en) * | 2018-02-07 | 2018-09-18 | 中车株洲电力机车有限公司 | A kind of steering framing wheel readjustment regulating device |
| CN109115075A (en) * | 2018-09-21 | 2019-01-01 | 上海奥林汽车安全系统有限公司 | A kind of automotive door hinge body part cubing |
| CN209263920U (en) * | 2018-12-26 | 2019-08-16 | 贵阳航发精密铸造有限公司 | A kind of special measurement collet detected automatically for moving turbine blade final inspection |
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2021
- 2021-01-29 CN CN202110125875.4A patent/CN112857282B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601105A (en) * | 1983-04-05 | 1986-07-22 | Kichisaburo Yamazaki | Vehicle measuring instrument |
| CN201903330U (en) * | 2010-07-28 | 2011-07-20 | 珠海蓝冠电子科技有限公司 | Transparent detection tool |
| CN207875663U (en) * | 2018-02-07 | 2018-09-18 | 中车株洲电力机车有限公司 | A kind of steering framing wheel readjustment regulating device |
| CN109115075A (en) * | 2018-09-21 | 2019-01-01 | 上海奥林汽车安全系统有限公司 | A kind of automotive door hinge body part cubing |
| CN209263920U (en) * | 2018-12-26 | 2019-08-16 | 贵阳航发精密铸造有限公司 | A kind of special measurement collet detected automatically for moving turbine blade final inspection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199155A (en) * | 2021-12-09 | 2022-03-18 | 湖北文理学院 | Locomotive frame pull rod seat deformation measurement platform and method based on machine vision |
| CN114199155B (en) * | 2021-12-09 | 2023-11-14 | 湖北文理学院 | Locomotive framework pull rod seat deformation measurement platform and method based on machine vision |
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| CN112857282B (en) | 2022-09-13 |
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