A batch flexible adaptive marking device for close-range photogrammetry

Abstract

The invention discloses a batch flexible adaptive marking device for close-range photogrammetry, belonging to the technical field of close-range photogrammetry devices; the device comprises a rope net and a flexible rope; a triangular metal plate or a circular metal plate is arranged at the center of each grid of the rope net; the triangular metal plate and the circular metal plate are connected to the corresponding nodes of the rope net through a flexible rope; a reflector is arranged on the upper surface of the triangular metal plate; and a coding mark is arranged on the upper surface of the circular metal plate. The manufacturing method of the invention is simple, low-cost and easy to implement.

Description

Technical Field

[0001] The invention belongs to the technical field of close-range photogrammetry devices, and in particular relates to a close-range photogrammetry batch flexible adaptive marker (reflector sheet and coding marker) device, which is suitable for batch measurement of antenna reflector surface accuracy. Background Art

[0002] Photogrammetry marks are made of retro-reflective materials, which can reflect the incident light back to the light source along the original path. Under the illumination of a near-axial light source, they can form a "quasi-binary" image with obvious grayscale contrast on the film, which is suitable for high-precision feature point extraction in photogrammetry. In digital industrial photogrammetry applications, in order to generate a sufficient number of feature points with obvious contrast, the method of manually pasting measurement marks is basically adopted. Manual pasting is inefficient and prone to gross errors. With the increasing application of digital industrial photogrammetry systems, the efficient layout of measurement marks (reflectors and coding marks) has practical significance in response to the demand for high-efficiency and low-cost surface accuracy measurement of mass-produced antenna reflectors.

[0003] At present, the placement of digital industrial photogrammetry signs is mainly done by manual pasting, which is not only prone to inaccurate pasting and wrinkles, but also inefficient. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a close-range photogrammetry batch flexible adaptive marker (reflector and coding marker) device, which is suitable for the rapid arrangement of batch close-range photogrammetry markers on antenna reflective surfaces, especially antenna reflective surfaces with larger areas. After adopting the device, the marker arrangement efficiency is improved by more than 100 times, and the manufacturing method is simple, low-cost and easy to implement.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A batch flexible adaptive marking device for close-range photogrammetry comprises a rope net and a flexible rope; a triangular metal plate or a circular metal plate is provided at the center of each grid of the rope net; the triangular metal plate and the circular metal plate are connected to corresponding nodes of the rope net through flexible ropes; a reflector is provided on the upper surface of the triangular metal plate; and a coding mark is provided on the upper surface of the circular metal plate.

[0007] Furthermore, the rope net is a triangular structure, which is composed of a plurality of triangular grids arranged in a triangular array.

[0008] Furthermore, each corner end of the triangular metal plate is provided with a through hole; one end of the flexible rope corresponding to the triangular metal plate is connected to the through hole, and the other end is connected to the corresponding node of the triangular grid.

[0009] Furthermore, three straight holes are provided on the outer edge of the circular metal plate, and the spacing between the three straight holes is the same; one end of the flexible rope corresponding to the circular metal plate is connected to the straight hole, and the other end is connected to the corresponding node of the triangular grid.

[0010] The beneficial effects of adopting the above technical solution are:

[0011] (1) An equilateral triangular metal plate is used to adhere the reflective sheet. By utilizing the equilateral characteristics, the triangular metal plate and the flexible rope are flexibly combined to form the basic structure 1 of the device, which provides a guarantee for the rapid, accurate and efficient deployment of batch reflective sheets.

[0012] (2) A circular metal plate is used to affix the coding mark, and the circular metal plate is flexibly combined with a flexible rope to form the basic structure 2 of the device, which provides a guarantee for the rapid, accurate and efficient deployment of batch reflective sheets.

[0013] (3) A metal plate is used as the carrier of the measurement mark. The good designability of the metal plate is used to design the errors caused by curvature and gravity. The metal plate can not only rely on its own weight to adaptively fit on the antenna reflector surface, but also meet the requirements of the curvature and gravity of the antenna reflector surface measurement accuracy.

[0014] (4) The flexible rope is used as the connecting object of the metal flat plate sign, which has the advantages of light weight and softness, and can maximize the effect of the metal flat plate sign's own weight, providing an important guarantee for realizing the application function of the device.

[0015] (5) The device adopts a flexible combination of a metal flat plate sign and a flexible rope, and uses a stable structure and a unique design method, which ensures the realization of the important functions of the device.

[0016] (6) The metal flat plate mark and flexible rope are combined in a flexible manner. The molding process is simple and the technology is mature. It is particularly suitable for the layout of batch marks and the measurement of the surface accuracy of batch antenna reflectors.

[0017] (7) After adopting this device, the efficiency of marker (reflector and coding marker) layout is increased by more than 100 times, the time of measuring the surface accuracy of each antenna reflector is increased by more than 5 times, and the cost of hardware consumables is saved by more than 50 yuan per antenna reflector. The design and manufacturing method of this device is simple, low-cost and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The schematic diagram of a batch flexible adaptive marking device for close-range photogrammetry is shown in FIG.

[0019] Figure 2 for Figure 1 Schematic diagram of medium flexible rope and rope net.

[0020] Figure 3 for Figure 1 Schematic diagram of the middle rope net.

[0021] Figure 4 for Figure 1 Schematic diagram of the flexible connection between the medium flexible rope and the triangular metal flat reflector.

[0022] Figure 5 for Figure 1 Schematic diagram of the flexible connection between the medium flexible rope and the round metal flat plate coding mark.

[0023] Figure 6 for Figure 1 Schematic diagram of the medium triangular metal flat reflector.

[0024] Figure 7 for Figure 1 Schematic diagram of the medium circular metal flat plate coding mark.

[0025] Figure 8 for Figure 1 Schematic diagram of the medium triangular metal plate.

[0026] Fig. 9 for Figure 1 Schematic diagram of a medium circular metal plate.

[0027] Fig.10 for Figure 1 Schematic diagram of the middle reflector.

[0028] Fig.11 for Figure 1 Schematic diagram of Chinese coding symbols. DETAILED DESCRIPTION

[0029] A batch flexible adaptive marking device for close-range photogrammetry comprises a rope net and a flexible rope; a triangular metal plate or a circular metal plate is provided at the center of each grid of the rope net; the triangular metal plate and the circular metal plate are connected to corresponding nodes of the rope net through flexible ropes; a reflector is provided on the upper surface of the triangular metal plate; and a coding mark is provided on the upper surface of the circular metal plate.

[0030] Furthermore, the rope net is a triangular structure, which is composed of a plurality of triangular grids arranged in a triangular array.

[0031] Furthermore, each corner end of the triangular metal plate is provided with a through hole; one end of the flexible rope corresponding to the triangular metal plate is connected to the through hole, and the other end is connected to the corresponding node of the triangular grid.

[0032] Furthermore, three straight holes are provided on the outer edge of the circular metal plate, and the spacing between the three straight holes is the same; one end of the flexible rope corresponding to the circular metal plate is connected to the straight hole, and the other end is connected to the corresponding node of the triangular grid.

[0033] The following is further described by more specific embodiments:

[0034] A design and manufacturing method of a batch flexible adaptive marking device for close-range photogrammetry uses aluminum plates and flexible ropes as raw materials and consists of a reflective sheet 1, a coding mark 2, a triangular metal plate 3, a circular metal plate 4, a flexible rope 5, and a rope net 6.

[0035] Figure 1 It is a schematic diagram of a batch flexible adaptive marking device for close-range photogrammetry, including a reflective sheet 1, a coding mark 2, a triangular metal plate 3, a circular metal plate 4, a flexible rope 5, and a rope net 6. From this, the overall structure of the adaptive reflective sheet device and the relationship between the six basic components can be seen; Figure 2 As can be seen from the schematic diagram of the flexible rope and the rope net, the flexible rope 5 plays the role of connecting the metal plate and the rope net, and forms the rope net 6 according to a certain rule; Figure 3 Schematic diagram of the rope net, connected and composed according to certain rules and device performance requirements; Figure 4 Schematic diagram of flexible connection between a flexible rope and a triangular metal flat reflector, including a reflector 1, a triangular metal flat plate 3, a flexible rope 5 and a rope net 6, which together constitute the basic structure 1 of the device; Schematic diagram of flexible connection between a flexible rope 5 and a circular metal flat coding mark, including a coding mark 2, a circular metal flat plate 4, a flexible rope 5 and a rope net 6, which together constitute the basic structure 2 of the device; Figure 6 Schematic diagram of a triangular metal flat reflector, comprising a reflector 1 and a triangular metal flat plate 3, wherein the reflector 1 is pasted on the middle position of the triangular metal flat plate 3; Figure 7 Schematic diagram of a circular metal flat plate coding mark, including a coding mark 2 and a circular metal flat plate 4, wherein the coding mark 2 is pasted on the middle position of the circular metal flat plate 4; Figure 8 Schematic diagram of a triangular metal plate. This part is the carrier of the reflector. The triangular metal plate is an equilateral triangle, and connection holes are set at the same position of the three corners. The diameter of the connection holes is 2mm (three holes form an equilateral triangle) for connecting with the flexible rope; Fig. 9 Schematic diagram of a circular metal plate. This part is the carrier of the coding mark. Small holes with a diameter of 2 mm are punched at the same position of the three corners of the circular metal plate (the three holes form an equilateral triangle) for connection with the flexible rope; Fig.10 Schematic diagram of the reflector. The reflector has a diameter of 6 mm and is a strong reflective material for close-range photogrammetry. Fig.11 Schematic diagram of the coding mark. The coding mark is a 6mm series and is used for image stitching in close-range photogrammetry.

[0036] The manufacturing steps of batch flexible adaptive signs (reflective sheets and coded signs) are divided into:

[0037] a) Machine tools manufacture several triangular metal plates 3 and circular metal plates 4, such as Figure 8 Schematic diagram of triangular metal plate and Fig. 9 The circular metal plate is shown in the schematic diagram;

[0038] b) Paste 10 reflective sheets on the center of the upper surface of the 8 triangular metal plates to form Figure 6 Schematic diagram of a triangular metal flat reflector;

[0039] c) Use three flexible ropes to connect the three small holes of the six triangular metal flat reflectors;

[0040] d) According to Figure 4 Schematic diagram of the flexible connection between the flexible rope and the triangular metal flat reflector, which constitutes the basic structure of the device 1;

[0041] e) Paste the 11 coding mark on the center of the upper surface of the 9 circular metal plate to form Figure 7 Schematic diagram of circular metal flat plate coding mark;

[0042] f) Use three flexible ropes to connect to the three small holes of the 7 circular metal flat plate coding mark;

[0043] g) According to the schematic diagram of the flexible connection between the flexible rope 5 and the circular metal flat plate coding mark, the basic structure 2 of the device is formed;

[0044] h) According to Figure 1 A schematic diagram of a batch flexible adaptive marking device for close-range photogrammetry, wherein the basic structure 1 of step d) and the basic structure 2 of step g) are sequentially connected with the net rope according to the schematic diagram, and finally the Figure 1 The effect is shown.

[0045] When the flexible adaptive marker (reflector and coding marker) device is in use, unfold the rope net and gently place it on the reflective surface of the antenna to be measured. At this time, the reflector and coding marker will automatically stick to the surface of the antenna reflective surface, meeting the requirements for rapid deployment of close-range photogrammetry markers (reflector and coding markers).

[0046] Compared with the existing literature, the flexible adaptive marking device of the metal plate and the flexible rope used in the present invention has a novel design method, which relies on the self-weight of the metal plate to adaptively fit it on the antenna reflection surface, and uses the flexible rope to combine it into a large-area rope net, which greatly improves the efficiency of the photogrammetry mark layout. In addition, the marking device is easy to process and manufacture, with low manufacturing cost, and is easy to measure the surface accuracy of antenna panels in large quantities.

[0047] The present invention discloses a design and manufacturing method of a batch flexible adaptive marker (reflector and coding marker) device for close-range photogrammetry, which adopts a flexible combination of a flexible rope and a metal plate to paste the photogrammetry reflector and coding marker on the metal plate. When in use, the rope net is naturally placed on the antenna reflection surface, and all the reflectors and coding markers flexibly connected to the rope net are adaptively attached to the antenna reflection surface by the gravity of the metal plate, and then the close-range photogrammetry operation is carried out. The device is suitable for the rapid, efficient and accurate layout of photogrammetry markers (reflectors and coding markers) of large-area antenna reflection surfaces manufactured in batches. After adopting the device, the layout efficiency of the markers (reflectors and coding markers) is improved by more than 100 times, the surface accuracy measurement time of each antenna reflection surface is increased by more than 5 times, and the cost of hardware consumables is saved by more than 50 yuan. The design and manufacturing method of the device is simple, low-cost and easy to implement.

Claims

1. A batch flexible adaptive marking device for close-range photogrammetry, characterized in that: It includes a rope net and a flexible rope; a metal plate is provided at the center of each grid of the rope net, and the metal plates are divided into two types, one is a triangular metal plate and the other is a circular metal plate; the triangular metal plate and the circular metal plate are connected to the corresponding nodes of the rope net through flexible ropes; a reflector is provided on the upper surface of the triangular metal plate; and a coding mark is provided on the upper surface of the circular metal plate.

2. According to claim 1, a batch flexible adaptive marking device for close-range photogrammetry is characterized in that: The rope net is a triangular structure, which is composed of a plurality of triangular grids arranged in a triangular array.

3. According to claim 2, a batch flexible adaptive marking device for close-range photogrammetry is characterized in that: Each corner end of the triangular metal plate is provided with a through hole; one end of the flexible rope corresponding to the triangular metal plate is connected to the through hole, and the other end is connected to the corresponding node of the triangular grid.

4. According to claim 3, a batch flexible adaptive marking device for close-range photogrammetry is characterized in that: The outer edge of the circular metal plate is provided with three straight holes, and the intervals between the three straight holes are the same; one end of the flexible rope corresponding to the circular metal plate is connected to the straight hole, and the other end is connected to the corresponding node of the triangular grid.

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