Auxiliary device for verifying displacement measurement precision

Abstract

The utility model discloses a displacement measurement precision verification auxiliary device, which is characterized in that a carrying seat for mounting a target is slidably mounted on a first guide rail, so that the carrying seat can drive the target on the carrying seat to reciprocate along the direction of a first coordinate axis, meanwhile, a first rack extending along the direction of the first coordinate axis is arranged on the first guide rail, and a second rack extending along the direction of the second coordinate axis is arranged on the second guide rail. A first rotating shaft is rotatably installed on the carrying seat, and a first gear meshed with the first rack is fixedly arranged at the first end of the first rotating shaft. When displacement measurement precision needs to be verified, a user drives the first driving part to rotate, so that the first rotating shaft can drive the first gear to rotate, the first gear drives the carrying seat to move through meshing of the first gear and the first rack, and then the target is stably driven to move along the first guide rail by a corresponding displacement value. The measurement precision of the measuring instrument can be verified by comparing the displacement value of the target movement with the displacement value measured by the measuring instrument, so that the accuracy of algorithm and camera calibration is judged.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, and particularly to an auxiliary device for verifying the displacement measurement accuracy. Background Art

[0002] In the fields of industrial manufacturing, construction engineering, medical imaging, traffic management, virtual reality and augmented reality, etc., high-precision measurement technologies such as binocular vision, laser or 3D scanners are often used to measure and detect target objects.

[0003] Taking binocular vision displacement measurement as an example, it mainly obtains images of the same scene from different angles through binocular cameras, and uses parallax calculation to reconstruct the three-dimensional coordinates of the object, so as to realize high-precision real-time displacement measurement. As a non-contact measurement method, binocular vision technology measures through optical imaging rather than directly contacting the object, avoiding interference or damage that may be caused by contact. Especially in the measurement of precision and sensitive objects, such as electronic components, microelectromechanical systems (MEMS) and biological samples, the advantages of non-contact measurement are obvious, ensuring the safety and reliability of the measurement process. In industrial manufacturing, binocular vision measurement technology can be used to detect the size and shape errors of products, improving the accuracy of product quality control. In construction engineering, binocular vision measurement technology can be used to monitor the deformation and displacement of building structures, ensuring the safety of the project. In the field of medical imaging, high-precision three-dimensional images can be obtained through binocular vision measurement technology to assist doctors in accurate diagnosis and treatment. In traffic management, binocular vision measurement technology can be used to monitor road traffic conditions, identify vehicles and pedestrians, improving the efficiency and safety of traffic management. In addition, in the fields of virtual reality and augmented reality, through the three-dimensional data obtained by binocular vision measurement technology, more realistic virtual scenes and interactive experiences can be realized, enhancing the immersion and operation experience of users.

[0004] However, in practical applications, the accuracy of binocular vision displacement measurement technology is affected by factors such as algorithms and camera calibration. In order to ensure the accuracy and reliability of the measurement results, it is necessary to regularly verify and calibrate the accuracy of the binocular vision displacement measurement system. During the verification and calibration process, how to accurately and stably control the displacement of the target in the corresponding direction is extremely crucial. Summary of the Utility Model

[0005] Aiming at the deficiencies existing in the prior art, the utility model proposes an auxiliary device for verifying the displacement measurement accuracy, aiming to accurately and stably control the displacement of the verification target in the corresponding direction for verifying the measurement accuracy.

[0006] In order to achieve the above object, an auxiliary device for verifying the displacement measurement accuracy proposed by the utility model includes:

[0007] The first guide rail is arranged along the first coordinate axis direction and is provided with a supporting part for supporting it on the supporting surface;

[0008] The carrier can be slidably installed on the first guide rail and can reciprocally slide along the first guide rail in the first coordinate axis direction. An installation position for installing the target is provided on the carrier;

[0009] The first rack is arranged on the first guide rail and extends along the first coordinate axis direction; and

[0010] The first rotating shaft is rotatably installed on the carrier. A first gear meshing with the first rack is fixedly provided at the first end thereof, and a first driving part for the user to drive the first rotating shaft to rotate is provided at the second end.

[0011] In the technical solution of the present utility model, the carrier for installing the target is slidably installed on the first guide rail, so that the carrier can drive the target thereon to reciprocally move along the first coordinate axis direction. At the same time, a first rack extending along the first coordinate axis direction is arranged on the first guide rail, a first rotating shaft is rotatably installed on the carrier, and a first gear meshing with the first rack is fixedly provided at the first end of the first rotating shaft. When it is necessary to verify the displacement measurement accuracy, the user drives the first driving part to rotate, which can make the first rotating shaft drive the first gear to rotate. Thus, the first gear drives the carrier to move through its meshing with the first rack, and further stably drives the target to move a corresponding displacement value along the first guide rail. Comparing the displacement value of the movement of the target with the displacement value measured by a measuring instrument (such as a binocular vision displacement measuring device) can verify the measurement accuracy of the measuring instrument, thereby judging the accuracy of the algorithm and camera calibration, and the verification process is very simple and stable. Description of the Drawings

[0012] Figure 1 is a three-dimensional schematic diagram of an embodiment of the displacement measurement accuracy verification auxiliary device of the present utility model;

[0013] Figure 2 is a left view of an embodiment of the displacement measurement accuracy verification auxiliary device of the present utility model;

[0014] Figure 3 is a front view of an embodiment of the displacement measurement accuracy verification auxiliary device of the present utility model;

[0015] Figure 4 is Figure 1 a partial enlarged view of part A of

[0016] Figure 5 is a schematic diagram of the internal structure of the driving part of an embodiment of the displacement measurement accuracy verification auxiliary device of the present utility model.

[0017] Reference numerals in the figures: 1 - first guide rail, 10 - support portion, 11 - first rack, 12 - positioning groove, 2 - carrier, 21 - base, 22 - side arm, 23 - mounting position, 24 - screw hole, 3 - first rotating shaft, 30 - first gear, 31 - first driving portion, 4 - second guide rail, 41 - second rack, 5 - second slider, 6 - second rotating shaft, 61 - second driving portion, 7 - third guide rail, 71 - third rack, 8 - third slider, 9 - third rotating shaft, 91 - third driving portion; 111 - substrate, 112 - convex teeth; 101 - limiting groove. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figures 1-5 shown, the displacement measurement accuracy verification auxiliary device of the present invention includes a first guide rail 1, a carrier 2, a first rack 11 and a first rotating shaft 3.

[0020] The first guide rail 1 is arranged along the first coordinate axis direction, and is provided with a support portion for supporting it on the support surface. Through this support portion, the first guide rail 1 can be arranged along the first coordinate axis direction. The carrier 2 is slidably installed on the first guide rail 1 and can reciprocally slide along the first guide rail 1 in the first coordinate axis direction. The carrier 2 is provided with a mounting position 13 for mounting a target (not shown). The target can be in the shape of a plate, a block or a strip, etc., depending on the verification requirements. Preferably, it is a plate and is made of a material with relatively high strength, such as made of metal (such as steel or iron), engineering plastic, etc. Identifications can be set on it to facilitate the identification by measuring instruments (such as binocular vision displacement measurement instruments). The first rack 11 is arranged on the first guide rail 1 and extends along the first coordinate axis direction. The first rotating shaft 3 is rotatably installed on the carrier 2. A first gear 30 meshing with the first rack 11 is fixedly provided at its first end, and a first driving portion 31 for the user to drive the first rotating shaft 3 to rotate is provided at the second end. When it is necessary to verify the displacement measurement accuracy, the user drives the first driving portion 31 to rotate, so that the first rotating shaft 3 drives the first gear 30 to rotate. Thus, the first gear 30 drives the carrier 2 to move through its meshing with the first rack 11, and further stably drives the target to move a corresponding displacement value along the first guide rail 1. By comparing the displacement value of the movement of the target with the displacement value measured by a measuring instrument (such as a binocular vision displacement measurement device), the measurement accuracy of the measuring instrument can be verified, and thus the accuracy of the algorithm and camera calibration can be judged. And the overall operation process is very convenient and stable.

[0021] Understandably, the displacement value of the above-mentioned carrier 2 can be determined by measuring with an external measuring tool such as a ruler. A scale can also be set on the first guide rail 1 and / or the carrier 2 in the direction of the first coordinate axis to facilitate the determination of the displacement value of the carrier 2.

[0022] In some embodiments of the present invention, the first rack 11 can be a straight rack or an inclined rack, etc. When the first rack 11 is a straight rack (as Figure 5 shown), the moving direction of the carrier 2 along the first guide rail 1 is perpendicular to each convex tooth of the straight rack. Correspondingly, the teeth of the first gear 30 are straight teeth, and the teeth of the straight gear are parallel to the convex teeth. When the first rack 11 adopts an inclined rack (as Figure 3 shown), the moving direction of the carrier 2 along the first guide rail 1 is not perpendicular to each convex tooth of the inclined rack. Correspondingly, the teeth of the first gear 30 are inclined teeth or spiral teeth that cooperate with the inclined rack. The method of matching a straight rack with a straight gear has the advantages of relatively simple processing and low manufacturing cost. However, when a straight gear meshes with a straight rack, it enters and exits the meshing as a whole. Therefore, there is a problem of relatively weak stability, and relatively large vibration and noise may be generated. By using the inclined rack method, the inclined rack and the gear with inclined teeth or spiral teeth have the problems of complex processing and high manufacturing cost. However, when the inclined rack meshes with the inclined teeth or spiral teeth, the two have a larger overlap coefficient, that is, when the helical gear meshes, more teeth are involved in the meshing at the same time, and the meshing contact line is from short to long and then to short, and its stability and load-bearing capacity are stronger, and obvious vibration and noise will not be generated.

[0023] The carrier 2 is in a gate shape and includes a base 11 and side arms 12 vertically extending from both sides of the base 11. After the carrier 2 is slidably installed on the first guide rail 1, the two side arms 12 are located on both sides of the first rack 11. The middle part of the first rotating shaft 3 is rotatably installed on one of the side arms 12, and the first end passes through the side arm 12 and is provided with the first gear 30. This setting method can make the structure of the present invention more compact.

[0024] In the above embodiment, the first gear 30 and the first rotating shaft 3 are of an integrally formed structure or a split structure formed separately and then fixedly connected together.

[0025] The first driving part 31 is a butterfly handle or a round handwheel fixedly arranged on the first end of the first rotating shaft 3. By manually turning the first driving part 31, the first rotating shaft 3 can be driven to drive the first gear 30 to rotate.

[0026] In some embodiments, the mounting position 13 of the carrier 2 is provided on the surface of the carrier 2 facing away from the first rack 11 and is formed with a threaded hole 14, or a clamping structure is provided on the carrier 2 for mounting the target. Exemplarily, the mounting position 13 is provided on the surface of the base 11 away from the first rack 11. In a preferred embodiment, a plurality of sets of threaded holes 14 distributed in a rectangle are provided on the carrier 2 to adapt to the mounting of targets of different sizes.

[0027] In some embodiments of the present utility model, the first rack 11 includes a long strip-shaped substrate 111 extending along the first coordinate axis direction and convex teeth 112 spaced along the first coordinate axis direction on the surface of the substrate 111. The convex teeth 112 are integrally formed with the substrate 111 or fixed to the substrate 111 by screws. The first guide rail 1 is formed with a positioning groove 12 adapted to the substrate 111. The substrate 111 is partially or wholly embedded in the positioning groove 12 and is fixedly connected to the first guide rail 1 through a connecting structure such as screws or a snap structure.

[0028] In some embodiments, the support portion 10 and the first guide rail 1 may be an integrally formed structure or a split structure formed separately and assembled together. In a preferred embodiment, a limiting groove 101 adapted for partial insertion of the first guide rail 1 is formed on the surface of the support portion 10 facing the first guide rail 1. After the rod portion of the screw passes through the support portion 10 from the side of the support portion 10 facing away from the first guide rail 1, it is screwed with the first guide rail 1, thereby fixedly connecting the first guide rail 1 and the support portion 10 together.

[0029] In some embodiments of the present utility model, the present utility model further includes a second guide rail 4, a second rotating shaft 6 and a second rack 41. The second guide rail 4 is arranged along a second coordinate axis direction perpendicular to the first coordinate axis direction. The support portion 10 is directly or movably mounted on the second guide rail 4 through a second slider 5 and can reciprocally slide along the second guide rail 4 in the second coordinate axis direction. The second rack 41 is provided on the second guide rail 4 and extends along the second coordinate axis direction. The second rotating shaft 6 is rotatably provided on the second slider 5. A second gear (not shown) meshing with the second rack 41 is provided at the first end of the second rotating shaft 6, and a second driving portion 61 for the user to drive the second rotating shaft 6 to rotate is provided at the second end. When the user drives the second driving portion 61 to rotate, the second rotating shaft 6 can drive the second gear to rotate, so that the second gear drives the first guide rail 1 and the carrier 2 thereon to move along the second coordinate axis direction through its meshing with the second rack 41. The carrier 2 is enabled to move in a two-dimensional plane space formed by the first coordinate axis direction and the second coordinate axis direction.

[0030] Understandably, for the specific structures, installation methods, working principles, etc. of the second rotating shaft 6, second gear, second rack 41, and second slider 5, reference may be made to the above-described embodiments of the first rotating shaft 3, first gear 30, first rack 11, and carrier 2, and details will not be elaborated herein.

[0031] Understandably, the displacement value of the movement of the first guide rail 1 along the second guide rail 4 can also be determined by measuring with an external measuring tool such as a ruler. A scale can also be provided on the second guide rail 4 and / or the second slider 5 (or the supporting part) in the second coordinate axis direction to facilitate determining the displacement value of the carrier 2 in the second coordinate axis direction.

[0032] In some embodiments of the present invention, the present invention further includes a third guide rail 7, a third rotating shaft 9, and a third rack 71. The third guide rail 7 is arranged along a third coordinate axis direction that is perpendicular to both the first coordinate axis direction and the second coordinate axis direction. The second guide rail is movably installed on the third guide rail 7 through a third slider 8 and can reciprocally slide on the third guide rail 7 in the third coordinate. The third rack 71 is arranged on the third guide rail 7 and extends along the third coordinate axis direction. The third rotating shaft 9 is rotatably arranged on the third slider 8. A third gear (not shown) that meshes with the third rack 71 is provided at the first end of the third rotating shaft 9, and a third driving part 91 for the user to drive the third rotating shaft 9 to rotate is provided at the second end. When the user drives the third driving part 91 to rotate, the third rotating shaft 9 can drive the third gear to rotate, so that the third gear drives the second guide rail 4, the first guide rail 1, and the carrier 2 thereon to move along the third coordinate axis direction through its meshing with the third rack 71. This enables the carrier 2 to have the ability to move in the three-dimensional space formed by the first coordinate axis direction, the second coordinate axis direction, and the third coordinate axis direction.

[0033] Understandably, for the specific structures, installation methods, working principles, etc. of the third rotating shaft 9, third gear, third rack 71, and third slider 8, reference may be made to the above-described embodiments of the first rotating shaft 3, first gear 30, first rack 11, and carrier 2, and details will not be elaborated herein.

[0034] Understandably, the displacement value of the movement of the second guide rail 4 along the third guide rail 7 can also be determined by measuring with an external measuring tool such as a ruler. A scale can also be provided on the third guide rail 7 and / or the third slider 8 in the third coordinate axis direction to facilitate determining the displacement value of the carrier 2 in the third coordinate axis direction.

[0035] It should be noted that the first coordinate axis direction can be the X-axis direction, Y-axis direction, or Z-axis direction. When the first coordinate axis direction is the Z-axis direction, the second coordinate axis direction is the X-axis direction or Y-axis direction, and the third coordinate axis direction is the Y-axis direction or X-axis direction, and so on. For example Figure 3In the illustrated embodiment, the first coordinate axis direction is the Z-axis direction, the second coordinate axis direction is the Y-axis direction, and the third coordinate axis direction is the X-axis direction.

[0036] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0037] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An auxiliary device for verifying displacement measurement accuracy, characterized in that Comprising: A first guide rail, which is arranged along the first coordinate axis direction and is provided with a supporting portion for supporting it on the supporting surface; A carrier seat, which is slidably mounted on the first guide rail and can reciprocate along the first guide rail in the first coordinate axis direction. An installation position for installing a target is provided on the carrier seat; A first rack, which is arranged on the first guide rail and extends along the first coordinate axis direction; and A first rotating shaft, which is rotatably mounted on the carrier seat. A first gear meshing with the first rack is fixedly provided at the first end thereof, and a first driving portion for the user to drive the first rotating shaft to rotate is provided at the second end.

2. The displacement measurement accuracy verification auxiliary device according to claim 1, wherein: A scale is arranged on the first guide rail and / or the carrier seat along the first coordinate axis direction.

3. An auxiliary device for verifying the displacement measurement accuracy according to claim 2, characterized in that: The first rack is a straight rack or an inclined rack. When the first rack is a straight rack, the teeth of the first gear are straight teeth; when the first rack is an inclined rack, the teeth of the first gear are inclined teeth or helical teeth matching the inclined rack.

4. An auxiliary device for verifying the displacement measurement accuracy according to claim 3, characterized in that: The carrier seat is in a gate shape and includes a base and side arms vertically extending from both sides of the base. After the carrier seat is slidably mounted on the first guide rail, the two side arms are located on both sides of the first rack. The middle part of the first rotating shaft is rotatably mounted on one of the side arms, and the first end passes through the side arm and is provided with the first gear.

5. An auxiliary device for verifying the displacement measurement accuracy according to claim 4, characterized in that: The first driving portion is a butterfly handle or a circular handwheel fixedly provided at the first end of the first rotating shaft.

6. The displacement measurement accuracy verification auxiliary device according to claim 5, wherein: The installation position of the carrier seat is arranged on the surface of the carrier seat facing away from the first rack and is formed with a screw hole or provided with a clamping structure.

7. An auxiliary device for verifying the displacement measurement accuracy according to claim 1, characterized in that: The surface of the supporting portion facing the first guide rail is formed with a limiting groove for partial insertion and adaptation of the first guide rail. After the rod portion of the screw passes through the supporting portion from the side of the supporting portion facing away from the first guide rail, it is screwed with the first guide rail to fixedly connect the first guide rail and the supporting portion together.

8. An auxiliary device for verifying the displacement measurement accuracy according to claim 1, characterized in that: The first rack includes a long strip-shaped substrate extending along the first coordinate axis direction and racks arranged at intervals on the surface of the substrate along the first coordinate axis direction. The first guide rail is formed with a positioning groove adapted to the substrate, and the substrate is partially or wholly embedded in the positioning groove and fixedly connected to the first guide rail.

9. An auxiliary device for verifying the displacement measurement accuracy according to any one of claims 1 to 8, characterized in that: It further includes a second guide rail, a second rotating shaft and a second rack. The second guide rail is arranged along the second coordinate axis direction perpendicular to the first coordinate axis direction. The supporting portion is directly or movably mounted on the second guide rail through a second slider and can reciprocate along the second guide rail in the second coordinate axis direction. The second rack is arranged on the second guide rail and extends along the first coordinate axis direction. The second rotating shaft is rotatably arranged on the second slider. A second gear meshing with the second rack is provided at the first end of the second rotating shaft, and a second driving portion for the user to drive the second rotating shaft to rotate is provided at the second end.

10. An auxiliary device for verifying the displacement measurement accuracy according to claim 9, characterized in that: It further includes a third guide rail, a third rotating shaft and a third rack. The third guide rail is arranged along the third coordinate axis direction perpendicular to both the first coordinate axis direction and the second coordinate axis direction. The second guide rail is movably mounted on the third guide rail through a third slider and can reciprocate along the third guide rail in the third coordinate axis direction. The third rack is arranged on the third guide rail and extends along the third coordinate axis direction. The third rotating shaft is rotatably arranged on the third slider. A third gear meshing with the third rack is provided at the first end of the third rotating shaft, and a third driving portion for the user to drive the third rotating shaft to rotate is provided at the second end.

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