High-precision optical parameter testing device
By designing a high-precision test device for optical parameters, using the coordination relationship between the mounting base and square tube front mirror, the problems of initial position determination and mechanical zero consistency of photoelectric detection components are solved, and the precise testing of optical parameters is achieved, reducing the system error.
Patent Information
- Application Number
- CN202420798327.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-17
AI Technical Summary
During the testing of the photodetection component, the initial position cannot be accurately positioned, and the mechanical zero position is easily changed in multiple tests, resulting in test accuracy and consistency problems.
A high-precision test device for optical parameters is designed, including a transition base, a mounting base and a square tube front mirror. Through the coordination relationship between the first and second mounting platforms on the mounting base, the three-dimensional coordinates of the photoelectric detection component are adjusted. The system is associated with the three-dimensional coordinate system of the square tube front mirror. The two-dimensional optical turntable is used to adjust the lens of the square tube front mirror and align with the test target, thereby determining the optical axis direction of the photodetection assembly and ensuring the consistency of the mechanical zero position.
The initial position of the photodetection component is accurately positioned, ensuring that the optical axis is accurately pointed to the test target, reducing system errors caused by tooling installation, ensuring accurate testing of optical parameters, and providing a reliable test basis.
Smart Images
Figure CN222258675U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical processing fixtures, in particular to a high-precision optical parameter testing device. Background Art
[0002] The demand for unmanned and informationized weapons and equipment in modern battlefields of the 21st century is increasing. Various types of intelligent ammunition and unmanned reconnaissance equipment have emerged. The use of unmanned equipment for precise reconnaissance of battlefield situations has greatly improved the initiative and accuracy of troop operations and reduced casualties.
[0003] The unmanned cruise reconnaissance missile is equipped with an optoelectronic detection component to conduct real-time reconnaissance of enemy targets. The optoelectronic detection component includes modules such as visible light camera and infrared camera. During the development process, it is necessary to accurately test the parameters such as the coaxiality, imaging field of view and image distortion of the laser infrared camera of the optoelectronic detection component.
[0004] During the test, a collimator is used to provide an image target, and a two-dimensional optical turntable is used to adjust the pitch angle and azimuth angle of the photoelectric detection component. In order to meet the accuracy of the optical parameter test, the mechanical zero position of the component to be tested must be set in advance before the photoelectric detection component is tested, and the mechanical zero position can be accurately positioned and will not change during repeated tests. Therefore, it is necessary to design a suitable device to install the photoelectric detection component on the upper surface of the two-dimensional optical turntable, so that the initial position of the photoelectric detection component can be accurately positioned visually, so as to adjust the mechanical zero position before each test and eliminate the error caused by tooling and clamping to the greatest extent. Utility Model Content
[0005] The utility model aims to provide a high-precision optical parameter testing device to alleviate the problem that the initial position of a photoelectric detection component cannot be accurately positioned and the mechanical zero position will change during repeated testing.
[0006] In order to solve the above technical problems, the technical solution provided by the utility model is:
[0007] A high-precision optical parameter testing device comprises: a transition base, a mounting base and a square tube front mirror, wherein the transition base is mounted above a two-dimensional optical turntable, the mounting base is mounted above the transition base, the mounting base comprises a first mounting platform and a second mounting platform, the height of the second mounting platform is greater than the height of the first mounting platform, a photoelectric detection component is mounted on the first mounting platform, the square tube front mirror is mounted on the second mounting platform, and the lens of the square tube front mirror and the optical axis of the photoelectric detection component can both face the test target.
[0008] Furthermore, the first mounting platform has a first mounting surface, the second mounting platform has a second mounting surface and a third mounting surface, the second mounting surface and the third mounting surface are vertically arranged, the bottom surface of the photoelectric detection component is attached to the first mounting surface, the bottom surface of the square tube front mirror is attached to the second mounting surface, and one side surface of the square tube front mirror is abutted against the third mounting surface.
[0009] Furthermore, the height difference between the first mounting surface and the second mounting surface is equal to the height difference between the square tube front mirror and the photoelectric detection assembly.
[0010] Furthermore, the first mounting surface is provided with a first positioning pin and a second positioning pin, and the photoelectric detection component is correspondingly provided with a first mounting hole and a second mounting hole, the first positioning pin is inserted into the first mounting hole, and the second positioning pin is inserted into the second mounting hole.
[0011] Furthermore, the position accuracy of the first positioning pin and the second positioning pin are both less than 0.03.
[0012] Furthermore, the surface roughness of the first mounting surface, the second mounting surface and the third mounting surface are all less than 0.8.
[0013] Furthermore, the parallelism between the first mounting surface and the second mounting surface is less than 0.02.
[0014] Furthermore, the perpendicularity between the third mounting surface and the second mounting surface is less than 0.01.
[0015] Furthermore, the parallelism between the first mounting surface and the bottom surface of the transition base is less than 0.02, and the parallelism between the top surface of the transition base and the bottom surface of the transition base is less than 0.02.
[0016] Furthermore, the transition base and the mounting base are both provided with a weight-reducing structure.
[0017] The utility model brings at least the following beneficial effects:
[0018] The utility model provides a high-precision test device for optical parameters, comprising: a transition base, a mounting base and a square tube front mirror, the transition base is installed above a two-dimensional optical turntable, the mounting base is installed above the transition base, the mounting base comprises a first mounting platform and a second mounting platform, the height of the second mounting platform is greater than the height of the first mounting platform, the photoelectric detection component is installed on the first mounting platform, the square tube front mirror is installed on the second mounting platform, and the lens of the square tube front mirror and the optical axis of the photoelectric detection component can both face the test target.
[0019] The optical parameter high-precision test device uses a mounting base and a square tube front mirror to visually and accurately locate the initial position of the photoelectric detection component. The transition base is installed on the two-dimensional optical turntable, and the mounting base is installed on the transition base. The three-dimensional coordinate system of the photoelectric detection component is associated with the three-dimensional coordinate system of the square tube front mirror through the matching relationship between the first mounting platform and the second mounting platform on the mounting base. When the two-dimensional optical turntable is adjusted so that the lens of the square tube front mirror is aligned with the test target, the optical axis of the photoelectric detection component is also determined to point to the test target.
[0020] This application designs a corresponding test device for the optical test link of the photoelectric detection component, which solves the installation and calibration problems during the optical test of the photoelectric detection component. In the actual test process, the optical axis position of the photoelectric detection component can be visually and accurately positioned to ensure that the optical axis of the photoelectric detection component accurately points to the test target, and the consistency of the mechanical zero position of the photoelectric detection component can be ensured during repeated tests, which minimizes the system error caused by the installation of the tooling, achieves the purpose of accurately testing various optical parameters of the photoelectric detection component, and provides a reliable basis for the development of the photoelectric detection component.
[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0023] Figure 1 A schematic diagram of a high-precision optical parameter testing device provided by an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of a mounting base provided in an embodiment of the utility model;
[0025] Figure 3 A schematic diagram of a transition base provided in an embodiment of the utility model.
[0026] icon:
[0027] 100 - transition base; 200 - mounting base; 210 - first mounting platform; 211 - first mounting surface; 220 - second mounting platform; 221 - second mounting surface; 222 - third mounting surface; 300 - photoelectric detection assembly; 400 - square tube front mirror; 510 - first positioning pin; 520 - second positioning pin. DETAILED DESCRIPTION
[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0030] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] It should be noted that the units of the values of position, surface roughness, perpendicularity and parallelism in this application are all mm.
[0034] In conjunction with the accompanying drawings, some embodiments of the present utility model are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0035] Embodiment 1
[0036] The optical parameters of the photoelectric detection component need to be accurately tested. During the test, a collimator is used to provide an image target, and a two-dimensional optical turntable is used to adjust the pitch angle and azimuth angle of the photoelectric detection component. In order to meet the accuracy of the optical parameter test, the mechanical zero position of the component to be tested must be pre-set before the photoelectric detection component is tested, and the mechanical zero position can be accurately positioned and will not change during repeated tests. Therefore, it is necessary to design a suitable device to mount the photoelectric detection component on the upper surface of the two-dimensional optical turntable, so that the initial position of the photoelectric detection component can be accurately positioned visually.
[0037] In view of this, an embodiment of the utility model provides a high-precision testing device for optical parameters, including: a transition base 100, a mounting base 200 and a square tube front mirror 400, the transition base 100 is installed above the two-dimensional optical turntable, the mounting base 200 is installed above the transition base 100, the mounting base 200 includes a first mounting platform 210 and a second mounting platform 220, the height of the second mounting platform 220 is greater than the height of the first mounting platform 210, the photoelectric detection assembly 300 is installed on the first mounting platform 210, the square tube front mirror 400 is installed on the second mounting platform 220, and the lens of the square tube front mirror 400 and the optical axis of the photoelectric detection assembly 300 can both face the test target.
[0038] The optical parameter high-precision testing device uses a mounting base 200 and a square tube front mirror 400 to visually and accurately locate the initial position of the photoelectric detection component 300. The transition base 100 is installed on a two-dimensional optical turntable, and the mounting base 200 is installed on the transition base 100. The three-dimensional coordinate system of the photoelectric detection component 300 is associated with the three-dimensional coordinate system of the square tube front mirror 400 through the surface-to-surface matching relationship between the first mounting platform 210 and the second mounting platform 220 on the mounting base 200. When the two-dimensional optical turntable is adjusted so that the lens of the square tube front mirror 400 is aligned with the test target, it is also determined that the optical axis of the photoelectric detection component 300 points to the test target.
[0039] This application designs a corresponding test device for the optical test link of the photoelectric detection component 300, and solves the installation and calibration problems during the optical test of the photoelectric detection component 300. In the actual test process, the optical axis position of the photoelectric detection component 300 can be visually accurately positioned to ensure that the optical axis of the photoelectric detection component 300 accurately points to the test target, and the consistency of the mechanical zero position of the photoelectric detection component 300 can be ensured during repeated tests, which minimizes the system error caused by the installation of the tooling, achieves the purpose of accurately testing various optical parameters of the photoelectric detection component 300, and provides a reliable basis for the development of the photoelectric detection component 300.
[0040] In an optional manner of this embodiment, the first mounting platform 210 has a first mounting surface 211, the second mounting platform 220 has a second mounting surface 221 and a third mounting surface 222, the second mounting surface 221 and the third mounting surface 222 are vertically arranged, the bottom surface of the photoelectric detection component 300 is attached to the first mounting surface 211, the bottom surface of the square tube front mirror 400 is attached to the second mounting surface 221, and one side surface of the square tube front mirror 400 is abutted against the third mounting surface 222.
[0041] See also Figure 2 The first mounting platform 210 and the second mounting platform 220 are an integrated structure, the second mounting surface 221 and the first mounting surface 211 are parallel to each other, the bottom surface of the photoelectric detection component 300 is mounted on the first mounting surface 211, the bottom surface of the square tube front mirror 400 is mounted on the second mounting surface 221, and the right side surface of the square tube front mirror 400 is tightly fitted with the third mounting surface 222.
[0042] Furthermore, the height difference between the first mounting surface 211 and the second mounting surface 221 is equal to the height difference between the square tube front mirror 400 and the photoelectric detection assembly 300 .
[0043] Since the height of the second mounting platform 220 is greater than the height of the first mounting platform 210, and the height of the square tube front mirror 400 is less than the height of the photoelectric detection assembly 300, as long as the height difference between the first mounting surface 211 and the second mounting surface 221 is equal to the height difference between the square tube front mirror 400 and the photoelectric detection assembly 300, it can be ensured that the height of the optical axis of the photoelectric detection assembly 300 is consistent with the height of the lens of the square tube front mirror 400 after installation. The mounting base 200 is installed on the two-dimensional optical turntable through the transition base 100, and the optical axes of the lens of the square tube front mirror 400 and the photoelectric detection assembly 300 can both face the test target, and the height is consistent with the height of the test target.
[0044] In an optional manner of this embodiment, the first mounting surface 211 is provided with a first positioning pin 510 and a second positioning pin 520, and the photoelectric detection component 300 is correspondingly provided with a first mounting hole and a second mounting hole, the first positioning pin 510 is inserted in the first mounting hole, and the second positioning pin 520 is inserted in the second mounting hole.
[0045] See also Figure 1 , the photoelectric detection component 300 and the first mounting platform 210 are precisely positioned by the first positioning pin 510 and the second positioning pin 520. The position accuracy of the first positioning pin 510 and the second positioning pin 520 are both less than 0.03. The plane passing through the two pins and perpendicular to the first mounting surface 211 is determined by the positions of the two pins, and the xoz plane of the photoelectric detection component 300 is further determined by the fixing structure of the photoelectric detection component 300 itself; the verticality of the third mounting surface 222 and the second mounting surface 221 is less than 0.01, so the xoz plane of the photoelectric detection component 300 can be equivalent to the xoz plane of the square tube front mirror 400.
[0046] Furthermore, when designing the mounting base 200, it is required that the surface roughness of the first mounting surface 211, the second mounting surface 221 and the third mounting surface 222 are all less than 0.8, and the parallelism of the first mounting surface 211 and the second mounting surface 221 is less than 0.02, thereby ensuring that the xoy plane of the photoelectric detection component 300 can be equivalent to the xoy plane of the square tube front mirror 400.
[0047] Furthermore, the parallelism between the first mounting surface 211 and the bottom surface of the transition base 100 is less than 0.02, and the parallelism between the top surface of the transition base 100 and the bottom surface of the transition base 100 is less than 0.02, thereby ensuring that the reference plane xoy plane in the initial state installed on the two-dimensional optical turntable after the entire device is built is located in the horizontal plane.
[0048] In an optional manner of this embodiment, the mounting base 200 and the photoelectric detection assembly 300 are fixed through 6 Φ5 mounting holes, and the mounting base 200 and the transition base 100 are fixed through 4 Φ6 mounting holes. In order to reduce the weight of the tooling, the transition base 100 and the mounting base 200 are both provided with a weight-reducing structure, see Figure 2 and Figure 3 That is, multiple locations on the mounting base 200 and the transition base 100 are hollowed out without affecting the strength and use function.
[0049] The assembly process of the optical parameter high-precision test device of this embodiment is as follows:
[0050] First, install the transition base 100 on the two-dimensional optical turntable, ensure that the bottom surface of the transition base 100 is completely in contact with the plane of the two-dimensional optical turntable, and use four M6 screws to install and fix it.
[0051] Then install the mounting base 200 on the transition base 100, ensure that the two mounting surfaces are completely in contact with each other, and use four M6 screws to fix them.
[0052] Then, the photoelectric detection assembly 300 is placed on the first mounting surface 211 , and the two pins on the mounting base 200 are inserted into the corresponding holes of the photoelectric detection assembly 300 , and then the photoelectric detection assembly 300 is installed and fixed using 6 M5 screws.
[0053] Then, the square tube front mirror 400 is placed on the second mounting surface 221 , and the right side surface of the square tube front mirror 400 is completely fitted with the third mounting surface 222 .
[0054] Next, fine-tune the two-dimensional optical turntable and observe that the crosshairs of the square tube front mirror 400 coincide with the test target. At this time, the entire device has been placed in the mechanical zero position.
[0055] Finally, the photoelectric detection assembly 300 is turned on, and parameters such as the field of view angle, distortion and optical axis parallelism are tested through the images collected by the photoelectric detection assembly 300.
[0056] The high-precision optical parameter testing device provided in this embodiment solves the installation and calibration problems of the photoelectric detection component 300 during optical testing. After installation, it can ensure that the optical axis of the photoelectric detection component 300 is facing the test target in the initial state. At the same time, the consistency of the mechanical zero position can be guaranteed in the case of multiple tests, and the system error caused by the installation of the tooling is minimized. The accuracy of the optical test is guaranteed, and it is convenient to accurately test parameters such as the field of view angle, optical axis parallelism and distortion degree, providing a reliable basis for the development of the photoelectric detection component 300.
[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A high-precision optical parameter testing device, characterized in that: include: A transition base, a mounting base and a square tube front mirror, wherein the transition base is mounted above a two-dimensional optical turntable, the mounting base is mounted above the transition base, the mounting base comprises a first mounting platform and a second mounting platform, the height of the second mounting platform is greater than the height of the first mounting platform, the photoelectric detection assembly is mounted on the first mounting platform, the square tube front mirror is mounted on the second mounting platform, and the lens of the square tube front mirror and the optical axis of the photoelectric detection assembly can both face the test target.
2. The optical parameter high-precision testing device according to claim 1, characterized in that: The first mounting platform has a first mounting surface, the second mounting platform has a second mounting surface and a third mounting surface, the second mounting surface and the third mounting surface are vertically arranged, the bottom surface of the photoelectric detection component is attached to the first mounting surface, the bottom surface of the square tube front mirror is attached to the second mounting surface, and one side surface of the square tube front mirror is abutted against the third mounting surface.
3. The optical parameter high-precision testing device according to claim 2, characterized in that: The height difference between the first mounting surface and the second mounting surface is equal to the height difference between the square tube front mirror and the photoelectric detection assembly.
4. The optical parameter high-precision testing device according to claim 2, characterized in that: The first mounting surface is provided with a first positioning pin and a second positioning pin, and the photoelectric detection component is correspondingly provided with a first mounting hole and a second mounting hole, the first positioning pin is inserted into the first mounting hole, and the second positioning pin is inserted into the second mounting hole.
5. The optical parameter high-precision testing device according to claim 4, characterized in that: The position accuracy of the first positioning pin and the second positioning pin are both less than 0.
03.
6. The optical parameter high-precision testing device according to claim 5, characterized in that: The surface roughness of the first mounting surface, the second mounting surface and the third mounting surface are all less than 0.
8.
7. The optical parameter high-precision testing device according to claim 6, characterized in that: The parallelism between the first mounting surface and the second mounting surface is less than 0.
02.
8. The optical parameter high-precision testing device according to claim 7, characterized in that: The perpendicularity between the third mounting surface and the second mounting surface is less than 0.
01.
9. The optical parameter high-precision testing device according to claim 8, characterized in that: The parallelism between the first mounting surface and the bottom surface of the transition base is less than 0.02, and the parallelism between the top surface of the transition base and the bottom surface of the transition base is less than 0.
02.
10. The optical parameter high-precision testing device according to claim 1, characterized in that: The transition base and the mounting base are both provided with a weight-reducing structure.