Infrared camera calibration tool

Abstract

The utility model discloses an infrared camera calibration tool which comprises a calibration bottom plate. The to-be-calibrated infrared camera fixing mechanism is mounted on one side of the top of the calibration bottom plate and comprises an electric cylinder fixedly connected to the top of the calibration bottom plate. According to the utility model, the threaded shaft is driven to rotate through the positive and negative rotation motor, so that the optical calibration plate can be driven to perform reciprocating adjustment through the connecting slide block under the thread action of the threaded sleeve, the calibration distance can be conveniently adjusted, and meanwhile, the clamping pull rod is pulled through the pull ring, and then the clamping plate is driven to move upwards; then the infrared camera to be calibrated is placed in the fixing frame, the pull ring is loosened, so that the infrared camera can be conveniently fixed under the action of the elastic force of the clamping spring, and the height of the clamped infrared camera can be adjusted through the electric cylinder, so that the camera can be accurately aligned with the optical calibration plate; therefore, the calibration quality of the infrared camera is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared camera calibration, in particular to an infrared camera calibration tool. Background Art

[0002] In the image measurement process and machine vision applications, in order to determine the relationship between the three-dimensional geometric position of a point on the surface of a spatial object and its corresponding point in the image, a geometric model of camera imaging must be established. These geometric model parameters are the camera parameters. Under most conditions, these parameters must be obtained through experiments and calculations. The experimental process requires multiple adjustments to the positional relationship between the camera and the image. The process of solving the geometric model parameters is called camera calibration.

[0003] In the prior art, a Chinese utility model patent with announcement number CN216871239U discloses an infrared camera calibration tool, including a calibration plate, a light source frame, a base and a heater. The calibration plate is composed of two materials, infrared radiation ceramics and heat-insulating glass. The two materials are pieced together into a specific pattern shape according to a certain rule. The light source frame is detachably mounted on the base. The upper side of the light source frame has an inwardly inclined side panel, on which the light source is mounted. A square hole is provided on the base. The heater is in the shape of a plate and is mounted at the bottom of the square hole. A slot is provided on the side of the base, and the calibration plate is inserted into the base through the slot.

[0004] Although the above technical solution solves the corresponding technical problem, the above technical solution still has the following defects:

[0005] The above technical solution is not convenient for adjusting the calibration distance of the infrared machine and the height adjustment of the infrared camera, so that the calibration quality of the infrared camera is not high, thereby reducing the practicality. Utility Model Content

[0006] The purpose of the utility model is to provide an infrared camera calibration tool, which can realize convenient adjustment of the calibration distance, and at the same time, can realize convenient fixation and height adjustment of the infrared camera, so that the camera can be accurately aligned with the optical calibration plate, thereby ensuring the calibration quality of the infrared camera.

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] An infrared camera calibration tool, comprising:

[0009] Calibration base plate;

[0010] A fixing mechanism for the infrared camera to be calibrated is installed on one side of the top of the calibration base plate, wherein the fixing mechanism for the infrared camera to be calibrated comprises an electric cylinder fixedly connected to the top of the calibration base plate, and a fixing component for fixing the infrared camera to be calibrated is installed on the top of the electric cylinder;

[0011] A calibration mechanism is installed on the other side of the top of the calibration base plate, and the calibration mechanism includes a mounting shell fixedly connected to the top of the calibration base plate, an adjustment component is installed on the mounting shell, and an optical calibration plate is installed on the top of the adjustment component.

[0012] The infrared camera calibration tool not only drives the threaded shaft to rotate through the forward and reverse motors, but also drives the optical calibration plate to reciprocate under the action of the threads of the threaded sleeve through the connecting slider, so as to realize convenient adjustment of the calibration interval. At the same time, the clamping rod is pulled by the pull ring, and then the clamping plate is driven to move up, and then the infrared camera to be calibrated is placed in the fixed frame, and the pull ring is released, so that the infrared camera can be conveniently fixed under the action of the elastic force of the clamping spring, and the height adjustment of the clamped infrared machine can be realized through the electric cylinder, so that the camera can be accurately aligned with the optical calibration plate, thereby ensuring the calibration quality of the infrared camera.

[0013] The above-mentioned infrared camera calibration tool, wherein the fixing component includes a fixing frame fixedly connected to the output end of the electric cylinder, two symmetrically arranged clamping springs are fixedly connected to the top of the inner wall of the fixing frame, the bottoms of the two clamping springs are fixedly connected through a clamping plate, and a clamping rod is fixedly connected at the center of the top of the clamping plate.

[0014] In the above infrared camera calibration tool, the top of the clamping rod movably passes through the fixing frame and is slidably connected to the fixing frame.

[0015] The above-mentioned infrared camera calibration tool, wherein the adjustment component includes a forward and reverse motor fixedly connected to the side of the mounting shell, a threaded shaft is fixedly connected to the output shaft of the forward and reverse motor, a threaded sleeve is threadedly connected to the threaded shaft, a connecting slider is fixedly connected to the top of the threaded sleeve, a sliding groove slidably connected to the connecting slider is provided at the top of the mounting shell and at a position corresponding to the connecting slider, and the top of the connecting slider is fixedly connected to the bottom of the optical calibration plate.

[0016] The above infrared camera calibration tool, wherein a clamping pad is fixedly connected to the bottom of the clamping plate.

[0017] The above infrared camera calibration tool, wherein a pull ring is fixedly connected to the top of the clamping rod.

[0018] In the above infrared camera calibration tool, one end of the threaded shaft away from the forward and reverse motor is rotatably connected to the side surface of the inner wall of the mounting shell through a limit bearing.

[0019] The utility model has at least the following beneficial effects:

[0020] In the utility model, an infrared camera calibration tool is realized, which not only drives the threaded shaft to rotate through the forward and reverse rotation motor, but also drives the optical calibration plate to be reciprocated by the connecting slider under the action of the thread of the threaded sleeve, so as to realize convenient adjustment of the calibration interval. At the same time, the clamping rod is pulled by the pull ring, and then the clamping plate is driven to move up, and then the infrared camera to be calibrated is placed in the fixed frame, and the pull ring is released, so that the infrared camera can be conveniently fixed under the action of the elastic force of the clamping spring, and the height adjustment of the clamped infrared machine can be realized by the electric cylinder, so that the camera can be accurately aligned with the optical calibration plate, thereby ensuring the calibration quality of the infrared camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the infrared camera calibration tool of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a fixing mechanism of an infrared camera to be calibrated in the infrared camera calibration tool of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the calibration mechanism in the infrared camera calibration tool of the utility model.

[0025] The following are the descriptions of the figures:

[0026] 1 is the calibration base plate; 2 is the fixing mechanism of the infrared camera to be calibrated; 3 is the calibration mechanism;

[0027] 201 is an electric cylinder; 202 is a fixing component;

[0028] 2021 is a fixing frame; 2022 is a clamping spring; 2023 is a clamping plate; 2024 is a clamping pull rod;

[0029] 20231 is a clamping pad; 20241 is a pull ring;

[0030] 301 is a mounting shell; 302 is an adjustment component; 303 is an optical calibration plate;

[0031] 3021 is a forward and reverse motor; 3022 is a threaded shaft; 3023 is a threaded sleeve; 3024 is a connecting slider. DETAILED DESCRIPTION

[0032] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present invention.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] Please refer to Figures 1 to 3 As shown, an infrared camera calibration tool provided by an embodiment of the utility model comprises: a calibration base plate 1, a fixing mechanism 2 for an infrared camera to be calibrated installed on one side of the top of the calibration base plate 1, and a calibration mechanism 3 installed on the other side of the top of the calibration base plate 1;

[0036] Please refer to Figures 1 to 3 As shown, the fixing mechanism 2 for the infrared camera to be calibrated includes an electric cylinder 201 fixedly connected to the top of the calibration base plate 1, and a fixing component 202 for fixing the infrared camera to be calibrated is installed on the top of the electric cylinder 201;

[0037] Please refer to Figures 1 to 3 As shown, the fixing assembly 202 includes a fixing frame 2021 fixedly connected to the output end of the electric cylinder 201. Preferably, the fixing frame 2021 is in the shape of a hollow ring. Two symmetrically arranged clamping springs 2022 are fixedly connected to the top of the inner wall of the fixing frame 2021. The bottoms of the two clamping springs 2022 are fixedly connected by a clamping plate 2023. A clamping rod 2024 is fixedly connected at the center of the top of the clamping plate 2023.

[0038] The top of the clamping rod 2024 movably passes through the fixing frame 2021 and is slidably connected to the fixing frame 2021;

[0039] Please refer to Figures 1 to 3As shown, the calibration mechanism 3 includes a mounting shell 301 fixedly connected to the top of the calibration base plate 1, an adjustment component 302 is mounted on the mounting shell 301, and an optical calibration plate 303 is mounted on the top of the adjustment component 302;

[0040] Please refer to Figures 1 to 3 As shown, the adjustment component 302 includes a forward and reverse motor 3021 fixedly connected to the side of the mounting shell 301, a threaded shaft 3022 is fixedly connected to the output shaft of the forward and reverse motor 3021, a threaded sleeve 3023 is threadedly connected to the threaded shaft 3022, a connecting slider 3024 is fixedly connected to the top of the threaded sleeve 3023, a sliding groove slidably connected to the connecting slider 3024 is provided at the top of the mounting shell 301 and at a position corresponding to the connecting slider 3024, and the top of the connecting slider 3024 is fixedly connected to the bottom of the optical calibration plate 303.

[0041] Please refer to Figures 1 to 3 As shown, a clamping pad 20231 is fixedly connected to the bottom of the clamping plate 2023;

[0042] By adopting the above technical solution and setting the clamping pad 20231, the stability of clamping the infrared camera to be calibrated is increased, and damage to the infrared camera to be calibrated during clamping is avoided, thereby improving the practicality of the utility model.

[0043] Please refer to Figures 1 to 3 As shown, a pull ring 20241 is fixedly connected to the top of the clamping rod 2024;

[0044] By adopting the above technical solution, the pull ring 20241 is provided to facilitate pulling the clamping rod 2024, thereby improving the convenience of disassembly and assembly of the infrared camera to be calibrated.

[0045] Please refer to Figures 1 to 3 As shown, one end of the threaded shaft 3022 away from the forward and reverse motor 3021 is rotatably connected to the side of the inner wall of the mounting shell 301 through a limit bearing;

[0046] By adopting the above technical solution, the threaded shaft 3022 is limited by setting the limiting bearing, thereby increasing the stability of the threaded shaft 3022 when rotating.

[0047] In the specific implementation process, when the infrared camera needs to be calibrated, the infrared camera is first fixed on the infrared camera fixing mechanism 2 to be calibrated. Specifically, the fixing process of the infrared camera is to pull up the pull ring 20241. Since the pull ring 20241 is fixedly connected to the clamping rod 2024, the center of the top of the clamping plate 2023 is fixedly connected to the clamping rod 2024, which will drive the clamping plate 2023 to move to one side of the clamping rod 2024; since the clamping rod 2024 and the clamping plate 2023 are connected with a clamping spring 2022, when the clamping plate 2023 moves to one side of the clamping rod 2024, a compression force will be generated inside the clamping spring 2022, so that the clamping plate 2023 has a tendency to move to the side away from the clamping rod 2024 to restore the original position. At this time, the infrared camera is placed in the fixed frame 2021, so that the two ends of the infrared camera are respectively against the fixed frame 2021 and the clamping plate 2023, and the clamping spring 2022 generates a compression force inside to clamp the infrared camera. On this basis, since the top of the calibration base plate 1 is connected to the electric cylinder 201, the electric cylinder 201 is used to move the calibration base plate 1 up and down as a whole. When the infrared camera needs to be adjusted up and down, the electric cylinder 201 can be turned on, and the output end of the electric cylinder 201 is fixedly connected to the calibration base plate 1, thereby realizing the up and down adjustment of the infrared camera.

[0048] After fixing the infrared camera, when the infrared camera needs to be calibrated, adjust the forward and reverse motor 3021. Since the threaded shaft 3022 is fixedly connected to the output shaft of the forward and reverse motor 3021, when the forward and reverse motor 3021 rotates, the threaded shaft 3022 will rotate together; when the threaded shaft 3022 rotates, the threaded sleeve 3023 threadedly connected thereto can move along the axial direction of the threaded shaft 3022, thereby realizing the horizontal sliding block 3024 fixedly connected to the top of the threaded sleeve 3023 along the threaded shaft 3022, driving the optical calibration plate 303 to move relative to the infrared camera, and cooperating with the adjusting electric cylinder 201 to adjust the height of the infrared camera, so as to realize the calibration of the infrared camera.

[0049] When the infrared camera completes calibration, turn off the forward and reverse motor 3021 to stop the movement of the optical calibration plate 303 relative to the infrared camera; when the infrared camera needs to be removed and released, pull up the pull ring 20241 to drive the clamping plate 2023 to move toward the side of the clamping rod 2024; when the clamping plate 2023 moves toward the side of the clamping rod 2024, a greater compression force will be generated inside the clamping spring 2022, so that the clamping plate 2023 is separated from the infrared camera, and the infrared camera can be removed at this time.

[0050] The working principle of the utility model is: not only the threaded shaft 3022 is driven to rotate by the forward and reverse motor 3021, but also the optical calibration plate 303 is driven to reciprocate under the action of the thread of the threaded sleeve 3023 through the connecting slider 3024, so as to realize the convenient adjustment of the calibration interval, at the same time, the clamping rod 2024 is pulled by the pull ring 20241, and then the clamping plate 2023 is driven to move up, and then the infrared camera to be calibrated is placed in the fixed frame 2021, and the pull ring 20241 is released, so that the infrared camera can be conveniently fixed under the action of the elastic force of the clamping spring 2022, and the height adjustment of the clamped infrared machine can be realized through the electric cylinder 201, so that the infrared camera can be accurately aligned with the optical calibration plate 303, thereby ensuring the calibration quality of the infrared camera.

[0051] The selection and specifications of the power supply components involved in the above-mentioned embodiment, such as the electric cylinder 201 and the forward and reverse motor 3021, are selected according to the existing technology in the field. The circuit connection involved in the above-mentioned embodiment adopts the conventional power supply method in the field. The present utility model does not involve improvements to the circuit or other electronic components. In this embodiment, the output end of the electric cylinder 201 refers to the linearly adjustable output shaft in the electric cylinder 201. This component is a commonly used component in the field. This embodiment is a selection of its overall function and does not involve improvements to the component itself.

[0052] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. An infrared camera calibration tool, characterized in that: include: Calibration base plate (1); A fixing mechanism (2) for the infrared camera to be calibrated is installed on one side of the top of the calibration base plate (1), the fixing mechanism (2) for the infrared camera to be calibrated comprises an electric cylinder (201) fixedly connected to the top of the calibration base plate (1), and a fixing component (202) for fixing the infrared camera to be calibrated is installed on the top of the electric cylinder (201); A calibration mechanism (3) installed on the other side of the top of the calibration base plate (1), the calibration mechanism (3) comprising a mounting shell (301) fixedly connected to the top of the calibration base plate (1), an adjustment component (302) being installed on the mounting shell (301), and an optical calibration plate (303) being installed on the top of the adjustment component (302); The adjustment component (302) comprises a forward and reverse motor (3021) fixedly connected to the side of the mounting shell (301); a threaded shaft (3022) is fixedly connected to the output shaft of the forward and reverse motor (3021); a threaded sleeve (3023) is threadedly connected to the threaded shaft (3022); a connecting slider (3024) is fixedly connected to the top of the threaded sleeve (3023); a sliding groove slidably connected to the connecting slider (3024) is provided at the top of the mounting shell (301) and at a position corresponding to the connecting slider (3024); and the top of the connecting slider (3024) is fixedly connected to the bottom of the optical calibration plate (303).

2. An infrared camera calibration tool according to claim 1, characterized in that: The fixing assembly (202) comprises a fixing frame (2021) fixedly connected to the output end of the electric cylinder (201); two symmetrically arranged clamping springs (2022) are fixedly connected to the top of the inner wall of the fixing frame (2021); the bottoms of the two clamping springs (2022) are fixedly connected via a clamping plate (2023); and a clamping pull rod (2024) is fixedly connected at the center of the top of the clamping plate (2023).

3. An infrared camera calibration tool according to claim 2, characterized in that: The top of the clamping pull rod (2024) movably passes through the fixing frame (2021) and is slidably connected to the fixing frame (2021).

4. The infrared camera calibration tool according to claim 2, characterized in that: A clamping pad (20231) is fixedly connected to the bottom of the clamping plate (2023).

5. The infrared camera calibration tool according to claim 2, characterized in that: A pull ring (20241) is fixedly connected to the top of the clamping pull rod (2024).

6. The infrared camera calibration tool according to claim 2, characterized in that: One end of the threaded shaft (3022) away from the forward and reverse motor (3021) is rotatably connected to the side surface of the inner wall of the mounting shell (301) via a limit bearing.

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