High-stability coordinate wall

Abstract

The invention discloses a high-stability coordinate wall which comprises a foundation wall, a fixed disc seat, a plurality of multi-stage invar rod groups and a plurality of fixed release target discs. The fixed disc seat is mounted in the center of a foundation wall and is used for fixing the fixed ends of the multi-stage invar rod groups; the multi-stage invar rod group comprises end ball head pieces, connecting ball head pieces and a plurality of invar rod pieces, the end ball head pieces are installed at the two ends of the multi-stage invar rod group, one end of the multi-stage invar rod group is installed on the fixed disc seat to serve as a fixed end, the other end of the multi-stage invar rod group is installed on the fixed release target disc to serve as a movable end, and the connecting ball head pieces are installed on the multiple fixed release target discs. The position fixation with the foundation wall is realized; the fixed release target discs and the multi-stage invar rod group are correspondingly distributed and fixed on the foundation wall, and each fixed release target disc has a one-way moving function, so that the influence of external deformation on the multi-stage invar rod group can be reduced. According to the invention, the calibration requirements of space coordinate measurement capabilities of various devices can be met, the stability of the whole structure is effectively ensured, and the influence caused by deformation of the foundation wall is reduced.

Description

Technical Field

[0001] The invention belongs to the field of geometric quantity testing, and in particular relates to a high-stability coordinate wall. Background Art

[0002] With the continuous development of the country's automobile, aviation, aerospace and other industries, the demand for non-contact measurement of various types of products is increasing, and large-size photogrammetric equipment has been more widely used. At the same time, the demand for calibration of photogrammetric equipment is also becoming more and more widespread. At present, there are many standards on the market for contour calibration of equipment such as laser scanners, such as ruler plates, coordinate walls, etc. These standards are used to meet various forms of calibration needs of photogrammetric equipment. Among them, the most comprehensive calibration equipment is the coordinate wall.

[0003] At present, the commonly used coordinate walls are mainly realized in the following ways. One is to arrange multiple independent targets on an integral wall, fix each target point to the wall separately, and measure the spatial points of different targets to obtain the positional relationship between the independent target points on the entire wall. The calibration process is realized by comparing the measurement results of the measured instrument with the calibration results. The disadvantage of this form is that each target point is independent of each other and is greatly affected by the deformation of the wall, which greatly affects the calibration accuracy and needs to be improved through more frequent periodic calibration. The second is to build an integral coordinate wall through rods with low linear expansion coefficients such as carbon fiber. Each rod network is installed on the entire wall through multiple installation nodes. The coplanar installation of the rods is achieved through multi-dimensional adjustment, and the measurement targets are set at the connection or end of the rod group. The disadvantage of this form is that its installation and adjustment components are too complicated, resulting in a large height from the wall after installation. Although the impact is reduced through initial adjustment and metal flexible design, the higher support distance will amplify the impact of wall deformation. At the same time, the deformation of its flexible components is small and only in a specific direction, so it is also greatly affected by wall deformation, resulting in reduced measurement accuracy. In order to meet the calibration requirements of photogrammetry equipment and laser scanner equipment for spatial position measurement, the coordinate wall not only needs to have a stable and reliable structure, but also needs to have sufficient resistance to wall deformation to meet the calibration requirements of different equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a high-stability coordinate wall, which can not only arbitrarily adjust the measurement target according to different measuring equipment to meet the calibration needs of the spatial coordinate measurement capabilities of various equipment, but also effectively ensure the stability of the overall structure and reduce the impact of base wall deformation.

[0005] In order to achieve the above-mentioned object, one aspect of the present invention provides a high-stability coordinate wall, comprising a base wall, a fixed disc seat, a plurality of multi-stage invar rod groups and a plurality of fixed release target discs;

[0006] The fixing plate seat is installed at the center of the foundation wall and is used to fix the fixed ends of multiple groups of multi-level invar rods;

[0007] The multi-stage Invar rod group includes an end ball head, a connecting ball head and a plurality of Invar rods. A connecting ball head is installed between every two adjacent Invar rods in the plurality of Invar rods. End ball heads are installed at both ends of the multi-stage Invar rod group, one end of which is installed on a fixed disc seat as a fixed end, and the other end is installed on a fixed release target disc as a movable end. The connecting ball head is installed on a plurality of fixed release target discs to achieve position fixation with the base wall.

[0008] The fixed release target plate and the multi-stage Invar rod group are distributed and fixed on the base wall in correspondence, and are respectively used to install the connecting ball head piece and the end ball head piece of the movable end of the multi-stage Invar rod group. Each fixed release target plate has a unidirectional movement function, which can reduce the influence of external deformation on the multi-stage Invar rod group.

[0009] Preferably, the fixed disc seat comprises a plurality of first pressing block upper seats, a plurality of first pressing block lower seats, an intermediate support plate and an intermediate base;

[0010] The intermediate base is fixedly installed at the center position of the base wall, and the intermediate support plate is installed above the intermediate base. The height of the intermediate support plate and the intermediate base can be adjusted by adding an adapter gasket. A plurality of first pressure block lower seats are installed above the intermediate support plate, and a plurality of first pressure block upper seats are respectively installed above the plurality of first pressure block lower seats. The common ball concave space between the two is used for compacting and installing the end ball head piece of the fixed end of the multi-stage Invar rod group. The top of the pressure block upper seat is provided with a target seat magnetic suction interface, which can realize the installation of a variety of standard measurement target balls.

[0011] Preferably, the fixed release target plate comprises a second pressing block upper seat, a second pressing block lower seat, a slide seat upper plate, an L plate, a fixed plate base, a fixed plate upper seat, a slide seat bottom plate and a sliding guide rail;

[0012] The fixed plate base is installed at various installation points on the base wall. There are two L-plates installed on both sides of the fixed plate base, which are used to fix the two ends of the fixed plate upper seat respectively. The slide seat bottom plate is installed on the top surface of the fixed plate upper seat. A sliding guide rail is installed on the slide seat bottom plate. A slide seat upper plate is installed above the sliding guide rail. The slide seat upper plate can move along the X direction. A second pressure block lower seat is installed on the slide seat upper plate. The second pressure block upper seat is installed above the second pressure block lower seat. The common ball concave space between the two is used for pressing and installing the end ball head piece and the connecting ball head piece of the movable end of the multi-stage invar rod group. The top of the second pressure block upper seat is equipped with a target seat magnetic suction interface, which can realize the installation and precise positioning of a variety of standard measurement target balls.

[0013] Preferably, the two ends of the Invar rod are threadedly connected to the two ends of the connecting ball head member, and a standard ball convex structure is provided in the middle of the connecting ball head member, which can be accurately placed and installed between the second pressure block upper seat and the second pressure block lower seat.

[0014] Preferably, the fixed plate base is fixedly connected to the base wall by bolts, and the Y-axis position can be adjusted through the waist-shaped holes. Waist-shaped holes are provided on the L-plate, which are used to fix the two ends of the fixed plate upper seat respectively, and the Z-axis position of the fixed plate upper seat can be adjusted through the waist-shaped holes.

[0015] The high-stability coordinate wall according to the above aspects of the present invention can not only arbitrarily adjust the measurement target according to different measurement equipment to meet the calibration needs of the spatial coordinate measurement capabilities of various devices, but also effectively ensure the stability of the overall structure and reduce the impact of base wall deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-stability coordinate wall according to an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of a fixed disc seat according to an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a multi-stage invar rod group according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic structural diagram of a fixed release target plate according to an embodiment of the present invention;

[0021] Figure 5 It is a working schematic diagram of a high stability coordinate wall according to an embodiment of the present invention.

[0022] Among them: 1-coordinate wall overall rod group, 2-base wall, 3-measuring instrument, 4-fixed disk seat, 5-fixed release target plate, 6-multi-level Invar rod group, 7-pressure block upper seat, 8-pressure block lower seat, 9-middle support plate, 10-middle base, 11-slide seat upper plate, 12-L plate, 13-fixed disk base, 14-fixed disk upper seat, 15-slide seat bottom plate, 16-sliding guide rail, 17-end ball head piece, 18-connecting ball head piece, 19-Invar rod piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] One embodiment of the present invention provides a high stability coordinate wall, such as Figure 1 As shown, the high stability coordinate wall of the embodiment of the present invention comprises a base wall 2 , a fixed disc seat 4 , a plurality of multi-level invar rod groups 6 and a plurality of fixed release target discs 5 .

[0025] The fixed disc seat 4 is used as the central fixing component of the multiple groups of multi-stage Invar rod groups 6, and is installed in the center of the entire foundation wall 2, and is used as the fixed end of the multi-stage Invar rod group 6. The end ball head piece 17 of the fixed end of the multi-stage Invar rod group 6 is installed on the fixed disc seat 4, and the end ball head piece 17 connecting the ball head piece 18 and the movable end is installed on multiple fixed release target discs 5, so as to achieve position fixation between the foundation wall 2. The fixed release target discs 5 are fixed on the wall of the foundation wall 2 according to the distribution of the multi-stage Invar rod group 6, and are respectively installed with the end ball head piece 17 connecting the ball head piece 18 and the movable end. Each fixed release target disc 5 has a unidirectional movement function, which can greatly reduce the influence of external deformation on the multi-stage Invar rod group 6.

[0026] like Figure 2As shown, the fixed disc seat 4 is an integral component, including a pressing block upper seat 7, a pressing block lower seat 8, an intermediate support plate 9 and an intermediate base 10. The intermediate base 10 is fixedly installed at the center of the base wall 2, and is used as the central fixed point of the entire coordinate wall integral rod group 1. It bears the weight of multiple multi-stage invar rod groups 6, so it is fixed and stabilized with the wall of the base wall 2 by bolts. There can be multiple fixed disc seats 4, and the coordinate wall integral rod group 1 is a collection of all multi-stage invar rod groups 6 extending from the center of the fixed disc seat 4. The intermediate support plate 9 is installed above the intermediate base 10, and its height with the intermediate base 10 can be adjusted by adding an adapter gasket. The overall height of the intermediate support plate 9 and the intermediate base 10 can be adjusted according to the actual wall space, thereby adjusting the height of the entire coordinate wall integral rod group 1 from the wall. Multiple groups of mounting threads are arranged above the intermediate support plate 9, which can be used to install multiple pressing block lower seats 8, and each pressing block lower seat 8 can be installed with a fixed end of a group of multi-stage invar rod groups 6. The upper pressure block seat 7 is installed above the lower pressure block seat 8. The common ball concave space between the two is used to press and install the end ball head 17 of the fixed end of the multi-stage invar rod group 6 and fix it firmly. The opening direction is designed according to the direction of the actual multi-stage invar rod group 6, leaving an angle margin for easy adjustment. The top of the upper pressure block seat 7 is equipped with a universal standard 38.1mm target seat magnetic suction interface, which can realize the installation and precise positioning of a variety of standard measurement target balls, and can prepare for subsequent measurements.

[0027] like Figure 3 As shown, the multi-stage Invar rod group 6 is an integral component, including an end ball head member 17, a connecting ball head member 18, and an Invar rod member 19. The Invar rod member 19 is the main component of the multi-stage Invar rod group 6, and can be composed of a plurality of Invar rod members. A connecting ball head member 18 is installed between every two adjacent Invar rod members 19 among the plurality of Invar rod members 19. The Invar rod members 19 are designed with mounting threads at both ends, which are threadedly connected with the connecting ball head member 18 at both ends. The length of the overall multi-stage Invar rod group 6 can be adjusted to the required length for work by adjusting the threads. A standard ball convex structure is provided in the middle of the connecting ball head member 18, which can be accurately placed and installed between the upper seat 7 and the lower seat 8 of each fixed release target plate 5. The end ball head members 17 are installed at the two ends of the multi-stage Invar rod group 6, one end of which is installed between the upper seat 7 and the lower seat 8 of the pressure block on the fixed plate seat 4 as a fixed end, and the other end is installed between the upper seat 7 and the lower seat 8 of the pressure block on the fixed release target plate 5 as a movable end.

[0028] like Figure 4As shown, the fixed release target plate 5 includes a pressure block upper seat 7, a pressure block lower seat 8, a slide seat upper plate 11, an L plate 12, a fixed plate base 13, a fixed plate upper seat 14, a slide seat bottom plate 15 and a sliding guide rail 16. The fixed plate base 13 is installed at various installation points on the base wall 2, and is fixedly connected to the wall of the base wall 2 by bolts, and the Y-direction position can be adjusted through the waist-shaped hole. There are two L plates 12 respectively installed on both sides of the fixed plate base 13, and waist-shaped holes are provided on them, which are used to fix the two ends of the fixed plate upper seat 14 respectively. The two ends of the fixed plate upper seat 14 are provided with threaded holes connected and fixed to the L plate 12, and the Z-direction position of the fixed plate upper seat 14 can be adjusted through the waist-shaped holes. The slide seat bottom plate 15 is installed on the top surface of the fixed plate upper seat 14, and the two are fixed by bolts. The slide seat bottom plate 15 is installed with a sliding guide rail 16. The upper plate 11 of the slide is installed above the sliding guide rail 16. The upper plate 11 of the slide can move along the X direction. It is provided with mounting threads and can be used to install a single pressure block lower seat 8. The pressure block lower seat 8 is installed above the upper plate 11 of the slide, in which a group of movable ends of a multi-stage Invar rod group 6 can be installed. The upper seat 7 of the pressure block is installed above the lower seat 8 of the pressure block. The common ball concave space between the two is used to press and install the end ball head 17 of the multi-stage Invar rod group 6 and fix it firmly. The opening direction is consistent with the direction of the rod group, and an angle margin is left for easy adjustment. The top of the pressure block upper seat 7 is equipped with a universal standard 38.1mm target seat magnetic suction interface, which can realize the installation and precise positioning of a variety of standard measurement target balls, and can be prepared for subsequent measurements.

[0029] like Figure 5 As shown, the working process of the high stability coordinate wall of the embodiment of the present invention is as follows: first, the fixed disc seat 4 and the fixed release target disc 5 are respectively installed at specific positions of the base wall 2, and after being firmly fixed, the fixed end ball head pieces 17 of the multi-stage invar rod group 6 are respectively placed in the pressure block lower seat 8 on the fixed disc seat 4, and the movable end of the multi-stage invar rod group 6, including part of the end ball head pieces 17 and the connecting ball head pieces 18, are installed in the pressure block lower seat 8 on the fixed release target disc 5, and then the pressure block upper seat 7 is respectively installed on all the pressure blocks on the fixed disc seat 4 and the fixed release target disc 5. The target plate 5 is fixed on the lower seat 8 of the block, and then the Y and Z positions of the target plate 5 are adjusted and fixed firmly; at this time, the ball head 18 is connected by threaded rotation to adjust the multi-stage invar rod group 6 to an appropriate length, and it is glued and fixed to prevent it from loosening and deformation later; according to the measuring instrument 3, a suitable standard measuring target ball is selected, and multiple standard measuring target balls are installed in the universal standard 38.1mm target seat magnetic suction interface on the top of each pressing block upper seat 7; first, the spatial position of each target seat is calibrated by a laser tracker, and then the formal measurement and calibration work can be carried out for different measuring instruments 3.

[0030] In summary, according to the high stability coordinate wall of the above embodiment of the present invention, the middle base 10 is installed at the center position of the base wall 2 as the central fixing point of the entire coordinate wall integral rod group 1, and stably bears the weight of multiple multi-stage Invar rod groups 6; the middle support plate 9 and the middle base 10 can be adjusted by adding an adapter gasket to adjust the height of the overall coordinate wall integral rod group 1 from the wall according to the actual wall conditions; multiple pressure block lower seats 8 and pressure block upper seats 7 are installed above the middle support plate 9, and the common ball concave space between the two is used to press and install the end ball head piece 17 of the multi-stage Invar rod group 6 and fix it firmly, and the opening direction is the same as the direction of the multi-stage Invar rod group 6, and the top of the pressure block upper seat 7 is configured There is a universal standard 38.1mm target seat magnetic suction interface, which can realize the installation and precise positioning of various standard measurement target balls; every two adjacent Invar rods 19 are connected to each other by connecting the ball head member 18, and the length of the overall multi-stage Invar rod group 6 can be adjusted by adjusting the thread; a standard ball convex structure is designed in the middle of the connecting ball head member 18, which can be accurately placed and installed between each pressure block upper seat 7 and the pressure block lower seat 8; one end of the end ball head member 17 is installed between the pressure block upper seat and the pressure block lower seat on the fixed disk seat 4 as a fixed end, and the other end is installed on the fixed release target disk 5 as a movable end, and the Y and Z directions are adjusted to eliminate all initial stresses, so that the Invar rod 19 is in a natural state of unidirectional release. The fixed plate base 13 is firmly connected to the base wall 1 and an L-plate 12 is installed thereon. The upper and lower positions of the fixed plate upper seat 14 can be adjusted through the waist-shaped holes on the L-plate 12. The sliding guide rail 16 installed on the slide base plate 15 is used to install the slide upper plate 11, which can move along the X direction to ensure the unidirectional release of the multi-stage Invar rod group 6. A single pressure block lower seat 8 is installed thereon, and a group of movable ends of the multi-stage Invar rod group 6 can be installed in the pressure block lower seat 8.

[0031] The high-stability coordinate wall of the embodiment of the present invention solves the problems of existing coordinate walls being greatly affected by external factors, having a single function, poor stability, and low measurement accuracy. It can not only adjust the measurement target arbitrarily according to different measuring equipment, but also meet the calibration needs of the spatial coordinate measurement capabilities of various equipment, and effectively ensure the stability of the overall structure, and reduce the impact of base wall deformation. The high-stability coordinate wall of the embodiment of the present invention is a high-precision, multi-functional calibration standard, which can meet the on-site calibration requirements of photogrammetry systems and laser scanners in any measurement range according to the size of the base wall. The high-stability coordinate wall of the embodiment of the present invention has the advantages of high measurement accuracy, good measurement stability, strong anti-deformation ability, and a wide range of applicable equipment, and can ensure the stable and reliable use of equipment for a long time.

[0032] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high stability coordinate wall, characterized in that: It includes a base wall, a fixed disc seat, a plurality of multi-stage invar rod groups and a plurality of fixed release target discs; The fixing plate seat is installed at the center of the foundation wall and is used to fix the fixed ends of multiple groups of multi-level invar rods; The multi-stage Invar rod group includes an end ball head, a connecting ball head and a plurality of Invar rods. A connecting ball head is installed between every two adjacent Invar rods in the plurality of Invar rods. End ball heads are installed at both ends of the multi-stage Invar rod group, one end of which is installed on a fixed disc seat as a fixed end, and the other end is installed on a fixed release target disc as a movable end. The connecting ball head is installed on a plurality of fixed release target discs to achieve position fixation with the base wall. The fixed release target plate and the multi-stage Invar rod group are distributed and fixed on the base wall in correspondence, and are respectively used to install the connecting ball head piece and the end ball head piece of the movable end of the multi-stage Invar rod group. Each fixed release target plate has a unidirectional movement function, which can reduce the influence of external deformation on the multi-stage Invar rod group.

2. The high stability coordinate wall according to claim 1, characterized in that: The fixed disc seat comprises a plurality of first pressing block upper seats, a plurality of first pressing block lower seats, an intermediate support plate and an intermediate base; The intermediate base is fixedly installed at the center position of the base wall, and the intermediate support plate is installed above the intermediate base. The height of the intermediate support plate and the intermediate base can be adjusted by adding an adapter gasket. A plurality of first pressure block lower seats are installed above the intermediate support plate, and a plurality of first pressure block upper seats are respectively installed above the plurality of first pressure block lower seats. The common ball concave space between the two is used for compacting and installing the end ball head piece of the fixed end of the multi-stage Invar rod group. The top of the pressure block upper seat is provided with a target seat magnetic suction interface, which can realize the installation of a variety of standard measurement target balls.

3. The high stability coordinate wall according to claim 1 or 2, characterized in that: The fixed release target plate comprises a second pressing block upper seat, a second pressing block lower seat, a slide seat upper plate, an L plate, a fixed plate base, a fixed plate upper seat, a slide seat bottom plate and a sliding guide rail; The fixed plate base is installed at various installation points on the base wall. There are two L-plates installed on both sides of the fixed plate base, which are used to fix the two ends of the fixed plate upper seat respectively. The slide seat bottom plate is installed on the top surface of the fixed plate upper seat. A sliding guide rail is installed on the slide seat bottom plate. A slide seat upper plate is installed above the sliding guide rail. The slide seat upper plate can move along the X direction. A second pressure block lower seat is installed on the slide seat upper plate. The second pressure block upper seat is installed above the second pressure block lower seat. The common ball concave space between the two is used for pressing and installing the end ball head piece and the connecting ball head piece of the movable end of the multi-stage invar rod group. The top of the second pressure block upper seat is equipped with a target seat magnetic suction interface, which can realize the installation and precise positioning of a variety of standard measurement target balls.

4. The high stability coordinate wall according to claim 3, characterized in that: The two ends of the Yin steel rod are threadedly connected to the two ends of the connecting ball head. A standard ball convex structure is arranged in the middle of the connecting ball head, which can be accurately placed and installed between the second pressure block upper seat and the second pressure block lower seat.

5. The high stability coordinate wall according to claim 1 or 2, characterized in that: The fixed plate base is fixedly connected to the base wall by bolts, and the Y-axis position can be adjusted through the waist-shaped holes. Waist-shaped holes are provided on the L-plate, which are used to fix the two ends of the fixed plate upper seat respectively. The Z-axis position of the fixed plate upper seat can be adjusted through the waist-shaped holes.

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