A calibration device for industrial photogrammetry system

Abstract

The present invention relates to the field of photogrammetry technology, and discloses an industrial photogrammetry system calibration device, comprising a granite platform, three granite columns are fixedly connected to the upper surface of the granite platform, namely a first granite column, a second granite column and a third granite column, and a granite block is fixedly connected to the upper surface of the granite platform. The industrial photogrammetry system calibration device is provided with seven accurately calibrated carbon fiber reference rulers, each of which has 5 reference lengths. A cubic space coordinate system is established, and the industrial photogrammetry system measures each reference length of the carbon fiber ruler at different positions and angles, and compares the measurement results with the actual reference length of the carbon fiber ruler according to the calibration procedure, so as to calibrate the accuracy of the industrial photogrammetry system. The design of the calibration device of the industrial photogrammetry system solves the gap in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of photogrammetry, in particular to an industrial photogrammetry system calibration device. Background Art

[0002] Industrial photogrammetry systems have the advantages of high precision, non-contact, fast measurement speed, adaptability to special environments, high data acquisition rate, good adaptability and portability. Their application in the field of industrial measurement is becoming increasingly mature and has been widely used in high-end manufacturing fields such as automobile and shipbuilding, aerospace, military manufacturing, nuclear power and wind power.

[0003] With the in-depth development of photogrammetry related technologies, the demand for calibration of photogrammetry systems has also emerged. How to correctly evaluate the accuracy of photogrammetry systems is one of the focuses in the field of metrology.

[0004] The same type of equipment is a three-dimensional space built with a metal frame. According to the verification requirements, 7 carbon fiber rods or metal rods are arranged. A certain number of reference lengths are arranged on the rods to calibrate the photogrammetry system. When the metal frame is in use, its own size changes due to temperature and other environmental factors, resulting in reduced stability of the entire detection system. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides an industrial photogrammetry system calibration device with stable performance. By establishing a spatial coordinate system, the accuracy of the industrial photogrammetry system can be calibrated, avoiding the change of the metal frame's own size caused by temperature and other environmental factors, which leads to a decrease in the stability of the entire detection system.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned stable performance of marble, the purpose of calibrating the accuracy of the industrial photogrammetry system is achieved by establishing a spatial coordinate system. The present invention provides the following technical solutions: an industrial photogrammetry system calibration device, comprising a granite platform, the upper surface of the granite platform is fixedly connected with three granite columns, namely a first granite column, a second granite column and a third granite column, the upper surface of the granite platform is fixedly connected with a granite block, a first carbon fiber reference ruler is fixedly connected between the first granite column and the outer surface of the granite block, and the second granite column and the granite block are fixedly connected. A second carbon fiber reference ruler is fixedly connected between the outer surfaces of the third granite column and the outer surface of the granite block, a third carbon fiber reference ruler is fixedly connected between the third granite column and the outer surface of the granite block, a fourth carbon fiber reference ruler is fixedly connected to the outer surface of the first granite column, a fifth carbon fiber reference ruler is transitionally connected between the top of the first granite column and the top of the second granite column, a sixth carbon fiber reference ruler is fixedly connected between the top of the second granite column and the top of the third granite column, and a seventh carbon fiber reference ruler is fixedly connected between the outer surface of the second granite column and the outer surface of the third granite column.

[0009] Preferably, five jacks are fixedly connected to the lower surface of the granite platform, and the five jacks are evenly distributed on the lower surface of the granite platform.

[0010] Preferably, the outer surfaces of the first carbon fiber reference ruler, the second carbon fiber reference ruler, the third carbon fiber reference ruler, the fourth carbon fiber reference ruler, the fifth carbon fiber reference ruler, the sixth carbon fiber reference ruler and the seventh carbon fiber reference ruler are each provided with five reference lengths.

[0011] Preferably, both ends of the first carbon fiber reference ruler, the second carbon fiber reference ruler, the third carbon fiber reference ruler, the fourth carbon fiber reference ruler, the fifth carbon fiber reference ruler, the sixth carbon fiber reference ruler and the seventh carbon fiber reference ruler are provided with rings.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the present invention provides an industrial photogrammetry system calibration device, which has the following beneficial effects:

[0014] (1) The calibration device of the industrial photogrammetry system uses granite as the basis of the entire device to ensure the stability and accuracy of the calibration results. After processing, the granite has the advantages of high precision, no rust, acid and alkali resistance, no magnetization, no deformation, and good wear resistance. It can remain stable under heavy loads and normal temperatures, providing guarantees for the accuracy and stability of the entire system. Compared with other similar testing equipment at home and abroad, the environmental factors have less impact on the device, and the system stability is higher.

[0015] (2) The industrial photogrammetry system calibration device sets up seven accurately calibrated carbon fiber reference rulers, each with five reference lengths. A cubic space coordinate system is established. The industrial measurement system measures each reference length of the carbon fiber ruler at different positions and angles, and compares the measurement results with the actual reference length of the carbon fiber ruler according to the calibration procedures, thereby calibrating the accuracy of the industrial measurement system. The design of the calibration device for the industrial photogrammetry system solves the gap in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 is a side view of the present invention;

[0019] Figure 4 It is a top view of the present invention.

[0020] In the figure: 1 granite platform, 2 first granite column, 3 second granite column, 4 third granite column, 5 granite block, 6 first carbon fiber reference ruler, 7 second carbon fiber reference ruler, 8 third carbon fiber reference ruler, 9 fourth carbon fiber reference ruler, 10 fifth carbon fiber reference ruler, 11 sixth carbon fiber reference ruler, 12 seventh carbon fiber reference ruler, 13 jack. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0022] See also Figure 1-4A calibration device for an industrial photogrammetry system, comprising a granite platform 1, three granite columns are fixedly connected to the upper surface of the granite platform 1, namely, a first granite column 2, a second granite column 3 and a third granite column 4, a granite block 5 is fixedly connected to the upper surface of the granite platform 1, and the granite has the advantages of high precision, no rust, acid and alkali resistance, no magnetization, no deformation, good wear resistance, etc. after processing, and can remain stable under heavy load and normal temperature, providing guarantee for the accuracy and stability of the whole system, a first carbon fiber reference ruler 6 is fixedly connected between the outer surface of the first granite column 2 and the granite block 5, and a second carbon fiber reference ruler 6 is fixedly connected to the outer surface of the first granite column 2 and the granite block 5. A second carbon fiber reference ruler 7 is fixedly connected between the granite column 3 and the outer surface of the granite block 5, a third carbon fiber reference ruler 8 is fixedly connected between the third granite column 4 and the outer surface of the granite block 5, a fourth carbon fiber reference ruler 9 is fixedly connected to the outer surface of the first granite column 2, a fifth carbon fiber reference ruler 10 is transitionally connected between the top of the first granite column 2 and the top of the second granite column 3, a sixth carbon fiber reference ruler 11 is fixedly connected between the top of the second granite column 3 and the top of the third granite column 4, and a seventh carbon fiber reference ruler 12 is fixedly connected between the outer surface of the second granite column 3 and the outer surface of the third granite column 4.

[0023] Furthermore, five jacks 13 are fixedly connected to the lower surface of the granite platform 1, and the five jacks 13 are evenly distributed on the lower surface of the granite platform 1, so as to provide support for the granite platform 1, and the five jacks 13 are evenly distributed on the lower surface of the granite platform 1, so as to achieve the effect of uniform force.

[0024] Furthermore, the outer surfaces of the first carbon fiber reference ruler 6, the second carbon fiber reference ruler 7, the third carbon fiber reference ruler 8, the fourth carbon fiber reference ruler 9, the fifth carbon fiber reference ruler 10, the sixth carbon fiber reference ruler 11 and the seventh carbon fiber reference ruler 12 are each provided with five reference lengths, and a cubic space coordinate system is established. The industrial measurement system measures each reference length of the carbon fiber ruler at different positions and angles, and compares the measurement results with the actual reference length of the carbon fiber ruler according to the calibration procedures, thereby calibrating the accuracy of the industrial measurement system.

[0025] Furthermore, both ends of the first carbon fiber reference ruler 6, the second carbon fiber reference ruler 7, the third carbon fiber reference ruler 8, the fourth carbon fiber reference ruler 9, the fifth carbon fiber reference ruler 10, the sixth carbon fiber reference ruler 11 and the seventh carbon fiber reference ruler 12 are provided with rings to facilitate installation.

[0026] In summary, the industrial photogrammetry system calibration device uses granite as the basis of the entire device to ensure the stability and accuracy of the calibration results. After granite processing, it has the advantages of high precision, no rust, acid and alkali resistance, no magnetization, no deformation, and good wear resistance. It can remain stable under heavy loads and normal temperatures, providing guarantees for the accuracy and stability of the entire system. Compared with other similar detection equipment at home and abroad, environmental factors have less impact on the device, and the system stability is higher.

[0027] The industrial photogrammetry system calibration device sets up seven accurately calibrated carbon fiber reference rulers, each of which has five reference lengths. A cubic space coordinate system is established. The industrial photogrammetry system measures each reference length of the carbon fiber ruler at different positions and angles, and compares the measurement results with the actual reference length of the carbon fiber ruler according to the calibration procedures, thereby calibrating the accuracy of the industrial photogrammetry system. The design of the calibration device for the industrial photogrammetry system solves the gap in the prior art.

[0028] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0029] The standard parts used in this application document can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt mature conventional means in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art. No specific description is given here. At the same time, the electrical components appearing in this article are all connected to the external main controller and the AC power. The peripheral controller mentioned in the specification can control the electrical components mentioned in this article, and the peripheral controller is a conventional known device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An industrial photogrammetry system calibration device, comprising a granite platform (1), characterized in that: The upper surface of the granite platform (1) is fixedly connected to three granite columns, namely a first granite column (2), a second granite column (3) and a third granite column (4); the upper surface of the granite platform (1) is fixedly connected to a granite block (5); a first carbon fiber reference scale (6) is fixedly connected between the first granite column (2) and the outer surface of the granite block (5); a second carbon fiber reference scale (7) is fixedly connected between the second granite column (3) and the outer surface of the granite block (5); a third carbon fiber reference scale (8) is fixedly connected between the third granite column (4) and the outer surface of the granite block (5); a fourth carbon fiber reference scale (9) is fixedly connected to the outer surface of the first granite column (2); the top of the first granite column (2) is fixedly connected to the top of the second granite column (3); A fifth carbon fiber reference ruler (10) is transitionally connected between the top ends; a sixth carbon fiber reference ruler (11) is fixedly connected between the top end of the second granite column (3) and the top end of the third granite column (4); a seventh carbon fiber reference ruler (12) is fixedly connected between the outer surface of the second granite column (3) and the outer surface of the third granite column (4); five jacks (13) are fixedly connected to the lower surface of the granite platform (1), and the five jacks (13) are evenly distributed on the lower surface of the granite platform (1); and the outer surfaces of the first carbon fiber reference ruler (6), the second carbon fiber reference ruler (7), the third carbon fiber reference ruler (8), the fourth carbon fiber reference ruler (9), the fifth carbon fiber reference ruler (10), the sixth carbon fiber reference ruler (11) and the seventh carbon fiber reference ruler (12) are all provided with five reference lengths.

2. The industrial photogrammetry system calibration device according to claim 1, characterized in that: Both ends of the first carbon fiber reference ruler (6), the second carbon fiber reference ruler (7), the third carbon fiber reference ruler (8), the fourth carbon fiber reference ruler (9), the fifth carbon fiber reference ruler (10), the sixth carbon fiber reference ruler (11) and the seventh carbon fiber reference ruler (12) are provided with rings.

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