An infrared movement non-uniformity correction device

Abstract

The utility model belongs to infrared movement core test technical field, concretely relates to a kind of infrared movement core non-uniformity correction equipment, including rack, target blackbody assembly, product fixing mechanism and the movable module mechanism for driving product fixing mechanism to move to make infrared movement core and target blackbody assembly alignment, product fixing mechanism includes the product jig for placing infrared movement core and the quick clip for fixing infrared movement core in product jig, target blackbody assembly and movable module mechanism are all set on rack.The utility model can realize automation data acquisition, greatly promote data acquisition efficiency, and when bad point correction, infrared movement core can be accurately moved to bad point correction position, ensure the consistency of bad point correction position, avoid the problem of inaccurate correction caused by manual operation position deviation, improve the overall quality and reliability of infrared movement core K test, to eliminate the adverse effects caused by non-uniformity as far as possible.

Description

Technical Field

[0001] This utility model belongs to the field of infrared core testing technology, specifically relating to an infrared core non-uniformity correction device. Background Technology

[0002] The widespread use of infrared thermal imagers has greatly improved the human field of vision. However, due to the inconsistent response of different detection units in infrared detection devices, the output images exhibit spatial non-uniformity, which seriously affects image quality and causes problems for subsequent processing. This non-uniformity is inherent to infrared detection devices, and currently, image correction is generally performed by conducting K-tests on the infrared sensor to minimize the adverse effects of this non-uniformity.

[0003] Currently, K-testing (multi-point calibration) of infrared sensors is performed manually by hand. This method is not only inefficient and time-consuming, but also unsustainable when demand is high. Furthermore, when dead pixels appear during testing, they need to be corrected by a host computer. However, manual operation cannot guarantee the consistency of the dead pixel location each time it is corrected, thus affecting the host computer's accurate judgment during correction. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an infrared core non-uniformity correction device, which can improve data acquisition efficiency and ensure the consistency of bad pixel correction position.

[0005] To achieve the above objectives, the technical solution of this utility model is an infrared core non-uniformity correction device, including a frame, a target blackbody assembly, a product fixing mechanism for fixing the infrared core, and a movable module mechanism for moving the product fixing mechanism to align the infrared core with the target blackbody assembly. The product fixing mechanism includes a product fixture for placing the infrared core and a quick clamp for fixing the infrared core in the product fixture. The target blackbody assembly and the movable module mechanism are both mounted on the frame.

[0006] As one embodiment, the target blackbody assembly includes a plurality of blackbody bodies arranged at intervals along the X-axis.

[0007] As one embodiment, the plurality of blackbodies sequentially include a first blackbodies for providing a 30° thermal radiation source, a second blackbodies for providing a 25° thermal radiation source, a third blackbodies for providing a 20° thermal radiation source, a fourth blackbodies for providing a 100° thermal radiation source, and a fifth blackbodies for providing a 40° thermal radiation source.

[0008] As one implementation method, the first blackbody, the second blackbody, and the third blackbody are arranged at equal intervals according to a first spacing, and the third blackbody, the fourth blackbody, and the fifth blackbody are arranged at equal intervals according to a second spacing.

[0009] As one implementation method, the first spacing is 230-260mm, and the second spacing is 290-320mm.

[0010] As one implementation method, a carrier plate is provided inside the frame, and each of the black bodies is fixed to the carrier plate by a fixing adjustment block.

[0011] As one embodiment, the quick clamp includes a base, a handle, a pressure rod, and a clamping head for pressing the infrared movement into the product fixture. One end of the pressure rod is connected to the clamping head, and the other end is rotatably connected to the base. The bottom of the handle is rotatably connected to the base, and the middle part of the handle is rotatably connected to the middle part of the pressure rod via a connecting rod.

[0012] As one embodiment, the movable module mechanism includes an X-axis module for moving the infrared sensor along the X-axis direction, a Y-axis module for moving the infrared sensor along the Y-axis direction, and a Z-axis module for moving the infrared sensor along the Z-axis direction.

[0013] As one embodiment, the X-axis module is disposed on the frame, the Z-axis module is slidably mounted on the X-axis module, the Y-axis module is slidably mounted on the Z-axis module, and the product fixing mechanism is slidably mounted on the Y-axis module.

[0014] As one implementation method, the X-axis module and the Y-axis module are belt modules, and the Z-axis module is a lead screw module.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) This utility model uses a movable module mechanism to move the infrared core in the product fixing mechanism to the test position and quickly align it with the target blackbody component. This enables automated data acquisition, greatly improving data acquisition efficiency. In addition, during bad spot correction, the infrared core can be precisely moved to the bad spot correction position to ensure the consistency of the bad spot correction position. This avoids the problem of inaccurate correction caused by the position deviation of manual operation, improves the overall quality and reliability of infrared core K test, and thus eliminates the adverse effects of non-uniformity as much as possible.

[0017] (2) This utility model directly calibrates the infrared core, ensuring that different products can collect data at the same position, reducing data deviation caused by positional deviation, improving product consistency, and ensuring that the center of each product is concentric with the center of the blackbody target, reducing inaccurate temperature data during collection due to positional deviation, and improving product temperature measurement accuracy.

[0018] (3) The equipment of this utility model has high working efficiency, high reliability and strong applicability. It can effectively solve the problems of low manual operation efficiency, high labor intensity of employees and difficulty in meeting the demand due to large demand when the existing infrared core is used for K. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of the infrared core non-uniformity correction device provided in this embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the frame provided in an embodiment of this utility model;

[0022] Figure 3 A partial schematic diagram of the infrared core non-uniformity correction device provided in an embodiment of this utility model;

[0023] Figure 4 A partial schematic diagram of the infrared core non-uniformity correction device provided in an embodiment of this utility model;

[0024] Figure 5 A schematic diagram of the target blackbody assembly provided in this embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the movable module mechanism provided in this embodiment of the utility model;

[0026] Figure 7 A schematic diagram of the movable module mechanism provided in this embodiment of the utility model;

[0027] Figure 8 A schematic diagram of the product fixing mechanism provided in this embodiment of the utility model;

[0028] In the diagram: 1. Frame; 11. Frame; 12. Carrier plate; 13. Acrylic plate; 14. Foot cup; 15. Handle; 16. Tri-color light; 17. Electrical control box; 18. Human-machine interface controller; 19. Caster wheel; 2. Target blackbody assembly; 21. First blackbody; 22. Second blackbody; 23. Third blackbody; 24. Fourth blackbody; 25. Fifth blackbody; 26. Fixing adjustment block; 3. Product fixing mechanism; 31. Product fixture; 32. Quick clamp; 321. Base; 322. Handle; 323. Pressure rod; 324. Pressure head; 325. Connecting rod; 4. Movable module mechanism; 41. X-axis cable chain; 42. X-axis module; 43. X-axis slide rail; 44. Z-axis module fixing plate; 45. Y-axis cable chain; 46. Y-axis module; 47. Z-axis module; 471. Z-axis ball screw; 472. Z-axis locking buckle; 473. Hand crank; 48. X-axis motor protective cover; 49. Y-axis module fixing plate; 5. Infrared sensor; 6. Host computer. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] like Figures 1-4As shown, this embodiment provides an infrared core non-uniformity correction device, including a frame 1, a target blackbody assembly 2, a product fixing mechanism 3 for fixing the infrared core 5, and a movable module mechanism 4 for moving the infrared core 5 to align it with the target blackbody assembly 2. The product fixing mechanism 3 includes a product fixture 31 for placing the infrared core 5 and a quick clamp 32 for fixing the infrared core 5 in the product fixture 31. The target blackbody assembly 2 and the movable module mechanism 4 are both mounted on the frame 1. In this embodiment, the movable module mechanism 4 moves the infrared core 5 in the product fixing mechanism 3 to the test position and quickly aligns it with the target blackbody assembly 2, enabling automated data acquisition and greatly improving data acquisition efficiency. Furthermore, during dead pixel correction, the infrared core 5 can be precisely moved to the dead pixel correction position, ensuring the consistency of the dead pixel correction position and avoiding inaccurate correction caused by manual operation position deviations. This improves the overall quality and reliability of the infrared core K test, thereby minimizing the adverse effects of non-uniformity.

[0033] In some embodiments, the target blackbody assembly 2 includes a plurality of blackbodies arranged at intervals along the X-axis. In this embodiment, the multiple blackbodies have different temperatures, allowing for in-situ calibration of the infrared sensor over a wider temperature range, significantly improving the accuracy of the measurement results.

[0034] like Figures 3-5 As shown, the plurality of blackbodies sequentially include a first blackbody 21 for providing a 30° thermal radiation source, a second blackbody 22 for providing a 25° thermal radiation source, a third blackbody 23 for providing a 20° thermal radiation source, a fourth blackbody 24 for providing a 100° thermal radiation source, and a fifth blackbody 25 for providing a 40° thermal radiation source. The emissivity of the first blackbody 21, the second blackbody 22, the third blackbody 23, the fourth blackbody 24, and the fifth blackbody 25 is all 0.98, which is close to the emissivity of an ideal blackbody, enabling more accurate simulation of the thermal radiation of real objects. Furthermore, the temperatures of the five blackbodies cover both the commonly used lower temperature range (20°-30°), as well as higher temperatures (100°) and transitional temperatures (40°), allowing the target blackbody assembly 2 to cover various temperature scenarios that the infrared core may encounter in practical applications. This fully meets the calibration requirements of the infrared core in different temperature ranges and improves the measurement accuracy of the infrared core.

[0035] In some embodiments, the first blackbody 21, the second blackbody 22, and the third blackbody 23 are arranged at equal intervals according to a first spacing, and the third blackbody 23, the fourth blackbody 24, and the fifth blackbody 25 are arranged at equal intervals according to a second spacing. Further, the first spacing is 230-260 mm, and the second spacing is 290-320 mm. Designing the blackbody spacing to be relatively small in the lower temperature range helps to more accurately calibrate the performance of the infrared core in the lower temperature range; while appropriately increasing the blackbody spacing in the higher temperature range ensures the effectiveness of the calibration. In one embodiment, the spacing between the first blackbody 21 and the second blackbody 22, and the spacing between the second blackbody 22 and the third blackbody 23, are equal and both 250 mm; the spacing between the third blackbody 23 and the fourth blackbody 24, and the spacing between the fourth blackbody 24 and the fifth blackbody 25, are equal and both 300 mm.

[0036] Furthermore, a carrier plate 12 is provided inside the frame 1, and each of the blackbodies is fixed to the carrier plate 12 by a fixing adjustment block 26. Figure 5 As shown, the first blackbody 21, the second blackbody 22, the third blackbody 23, the fourth blackbody 24, and the fifth blackbody 25 are all fixed to the carrier plate 12 in a diagonal manner by fixing adjustment blocks 26. This can effectively prevent the blackbody from shifting or tilting due to vibration or external force during use, ensuring the positional accuracy and stability of the blackbody. At the same time, the position of the blackbody can be finely adjusted by fixing adjustment blocks 26 according to the actual installation situation, further improving the installation accuracy.

[0037] like Figure 7 As shown, the product fixture 31 is equipped with a positioning groove that matches the infrared sensor 5, ensuring that the infrared sensor 5 is accurately fixed in the predetermined position. A quick clamp 32 is provided on one side of the product fixture 31, which can firmly press the infrared sensor 5 into the positioning groove after it is placed in the groove, preventing the infrared sensor 5 from falling off during module movement. After the infrared sensor 5 has been tested, it can be lifted upwards for easy removal. The infrared sensor 5 is connected to the host computer 6 via a video output cable.

[0038] In some embodiments, the quick clamp 32 includes a base 321, a handle 322, a pressure rod 323, and a clamping head 324 for pressing the infrared movement 5 into the product fixture 31. One end of the pressure rod 323 is connected to the clamping head 324, and the other end is rotatably connected to the base 321. The bottom of the handle 322 is rotatably connected to the base 321, and the middle part of the handle 322 is rotatably connected to the middle part of the pressure rod 323 via a connecting rod 325. By holding the top of the handle 322, rotating the handle 322 causes the clamping head 324 to press the infrared movement 5 downward or release the pressure on the infrared movement 5 upward.

[0039] like Figure 8 As shown, the base 321 is mounted on the product fixture 31 and located on one side of the infrared sensor 5. The handle 322 has an inverted Y-shaped structure with a hand grip at the top and an opening at the bottom that clamps the base 321 and the pressure rod 323 in the middle. The middle part is rotatably connected to one end of two connecting rods 325, and the other ends of the two connecting rods 325 are rotatably connected to both sides of the pressure rod 323.

[0040] Furthermore, the base 321 has a slope at the top facing the infrared core 5. The pressure rod 323 is rotatably connected to the top of the slope, and the bottom of the connecting rod 325 is located at the foot of the slope. When it is necessary to fix the infrared core 5, the handle 322 is turned to vertical. At this time, the connecting rod 325 is vertically pressed against the foot of the slope, which can drive the pressure rod 323 to drive the pressing head 324 to press the infrared core 5. When it is necessary to remove the infrared core 5, the handle 322 is turned to the side closer to the top of the slope until the connecting rod 325 is pressed against the slope surface. Continue turning until the connecting rod 325 drives the pressure rod 323 to rotate upward until the pressing head 324 leaves the infrared core 5.

[0041] In some embodiments, the movable module mechanism 4 includes an X-axis module 42 for moving the infrared core 5 along the X-axis direction, a Y-axis module 46 for moving the infrared core 5 along the Y-axis direction, and a Z-axis module 47 for moving the infrared core 5 along the Z-axis direction. Since the first blackbody 21, the second blackbody 22, the third blackbody 23, the fourth blackbody 24, and the fifth blackbody 25 are arranged sequentially and at intervals along the X-axis, the infrared sensor 5 can be moved along the X-axis by the X-axis module 42, thereby aligning with the five blackbodyes respectively; the infrared sensor 5 can be moved along the Y-axis by the Y-axis module 46, adjusting the distance between the infrared sensor 5 and the blackbody target surface, and getting as close to the target surface as possible without touching it; the infrared sensor 5 can be moved along the Z-axis by the Z-axis module 47. When different infrared sensors 5 are used for K-test, the axial position of the infrared sensor 5 is different. The position of the infrared sensor 5 in the Z-axis direction is adjusted by the Z-axis module 47, so that the infrared sensor 5 is coaxial with the center of the blackbody target.

[0042] In one embodiment, the X-axis module 42 is mounted on the frame 1, the Z-axis module 47 is slidably mounted on the X-axis module 42, the Y-axis module 46 is slidably mounted on the Z-axis module 47, and the product fixing mechanism 3 is slidably mounted on the Y-axis module 46. By mounting the Z-axis module 47 on the X-axis module 42, the Y-axis module 46 on the Z-axis module 47, and the product fixing mechanism 3 on the Y-axis module 46, the infrared core 5 can be moved as close as possible to the blackbody target surface while still allowing it to move along the X, Y, and Z axes.

[0043] In some embodiments, the X-axis module 42 and the Y-axis module 46 are belt-driven modules, and the Z-axis module 47 is a lead screw module. Further, the belt-driven module is an electric belt-driven module, and the lead screw module is a hand-cranked lead screw module. Figure 6 As shown, the Z-axis module 47 is fixed on the Z-axis module fixing plate 44; the carrier plate 12 is also provided with an X-axis slide rail 43 parallel to the X-axis module 42. One end of the Z-axis module fixing plate 44 is slidably mounted on the X-axis module 42, and the other end is slidably mounted on the X-axis slide rail 43. With the guiding effect of the X-axis slide rail 43, the Z-axis module fixing plate 44 and the Z-axis module 47 on it are ensured to maintain straightness and stability during movement.

[0044] In some embodiments, the hand-cranked screw module includes a Z-axis ball screw 471, a Y-axis module fixing plate 49, and a hand crank 473. The hand crank 473 is connected to the screw of the Z-axis ball screw 471, and the Y-axis module fixing plate 49 is connected to the ball nut of the Z-axis ball screw 471. The Y-axis module 46 is mounted on the Y-axis module fixing plate 49. The hand crank 473 can drive the screw of the Z-axis ball screw 471 to rotate, thereby driving the ball nut of the Z-axis ball screw 471 and the Y-axis module fixing plate 49 to move along the Z-axis direction. This, in turn, drives the Y-axis module 46 and the product fixing mechanism 3 on the Y-axis module 46 to move along the Z-axis direction. The position of the infrared core 5 and the center of the blackbody target coaxially can be determined by the host computer 6. Furthermore, the hand crank screw module also includes a Z-axis locking buckle 472 for locking the hand crank wheel 473. After adjusting the position of the infrared core 5 to be coaxial with the center of the blackbody target, the position of the hand crank wheel 473 is fixed by the Z-axis locking buckle 472 to prevent the position of the infrared core 5 from shifting during the movement of the X-axis module 42 and the Y-axis module 46.

[0045] In this embodiment, the frame 1 includes a frame 11 and a housing, which surrounds the frame 11 to protect the internal components of the equipment. Specifically, the frame 11 is made of aluminum profiles of different lengths connected by profile corner brackets, and the housing is made of 1.5mm thick sheet metal. The equipment door frame is connected using acrylic sheet 1316.

[0046] like Figure 1 As shown, the bottom of the frame 1 has a reserved electrical control box 17 for installing the industrial computer and the PLC electrical control part of the equipment; the four corners of the bottom of the frame 1 are equipped with feet 14 and casters 19 to facilitate stable placement and easy movement of the equipment; the sides of the frame 1 are equipped with handles 15 to facilitate the operator to move the equipment.

[0047] like Figure 1As shown, a tri-color light 16 is installed on the top of the rack 1 to provide real-time indication of the equipment's operating status and abnormal alarm prompts, enabling operators to quickly understand the equipment's operating status and take appropriate measures in a timely manner. A human-machine interface controller 18 is installed on one side of the top of the rack 1. The human-machine interface controller 18 includes a touch screen and control switches. Operators can intuitively view the equipment's operating parameters and set the working mode through the touch screen, while the control switches facilitate operators to perform functions such as start, stop, and reset.

[0048] The process of performing K-test on infrared sensor 5 using the equipment in this embodiment is as follows:

[0049] The infrared sensor 5 is placed in the product fixture 31 and fixed with the quick clamp 32. The positions of the five black bodies are adjusted and the coordinate parameters of each black body are input into the host computer 6 to indicate the positioning. The hand crank 473 is manually rotated to move the product fixing mechanism 3 along the Z-axis until the host computer 6 finds that the infrared sensor 5 is coaxial with the center of the black body target. The position of the hand crank 473 is fixed by the Z-axis locking buckle 472 to locate the position of the infrared sensor 5. The relative position between each black body and the infrared sensor 5 is recorded.

[0050] Close the equipment door and press the "Start Data Acquisition and K-test" button. The host computer 6 controls the X-axis module 42 and Y-axis module 46 to acquire data at the previously set relative positions of the infrared sensor 5 and the blackbody target. The infrared sensor 5 acquires data from the five blackbodies and sends the data back to the host computer 6 for confirmation. If a defective pixel appears during the K-test, the host computer 6 needs to correct it. When the host computer 6 displays an "OK" message, the K-test of the infrared sensor 5 is complete.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An infrared core non-uniformity correction device, characterized in that: The device includes a frame, a target blackbody assembly, a product fixing mechanism for fixing an infrared sensor, and a movable module mechanism for moving the product fixing mechanism to align the infrared sensor with the target blackbody assembly. The product fixing mechanism includes a product fixture for placing the infrared sensor and a quick clamp for fixing the infrared sensor in the product fixture. The target blackbody assembly and the movable module mechanism are both mounted on the frame.

2. The infrared core non-uniformity correction device as described in claim 1, characterized in that: The target blackbody assembly includes multiple blackbody components arranged at intervals along the X-axis.

3. The infrared core non-uniformity correction device as described in claim 2, characterized in that: The plurality of blackbodies sequentially include a first blackbodies for providing a 30° thermal radiation source, a second blackbodies for providing a 25° thermal radiation source, a third blackbodies for providing a 20° thermal radiation source, a fourth blackbodies for providing a 100° thermal radiation source, and a fifth blackbodies for providing a 40° thermal radiation source.

4. The infrared core non-uniformity correction device as described in claim 3, characterized in that: The first blackbody, the second blackbody, and the third blackbody are arranged at equal intervals according to a first spacing, and the third blackbody, the fourth blackbody, and the fifth blackbody are arranged at equal intervals according to a second spacing.

5. The infrared core non-uniformity correction device as described in claim 4, characterized in that: The first spacing is 230-260mm, and the second spacing is 290-320mm.

6. The infrared core non-uniformity correction device as described in claim 2, characterized in that: The frame is equipped with a carrier plate, and each of the black bodies is fixed to the carrier plate by a fixing adjustment block.

7. The infrared core non-uniformity correction device as described in claim 1, characterized in that: The quick clamp includes a base, a handle, a pressure rod, and a clamping head for pressing the infrared movement into the product fixture. One end of the pressure rod is connected to the clamping head, and the other end is rotatably connected to the base. The bottom of the handle is rotatably connected to the base, and the middle part of the handle is rotatably connected to the middle part of the pressure rod via a connecting rod.

8. The infrared core non-uniformity correction device as described in claim 2, characterized in that: The movable module mechanism includes an X-axis module for moving the infrared sensor along the X-axis direction, a Y-axis module for moving the infrared sensor along the Y-axis direction, and a Z-axis module for moving the infrared sensor along the Z-axis direction.

9. The infrared core non-uniformity correction device as described in claim 8, characterized in that: The X-axis module is mounted on the frame, the Z-axis module is slidably mounted on the X-axis module, the Y-axis module is slidably mounted on the Z-axis module, and the product fixing mechanism is slidably mounted on the Y-axis module.

10. The infrared core non-uniformity correction device as described in claim 8, characterized in that: The X-axis module and the Y-axis module are belt-driven modules, and the Z-axis module is a lead screw module.

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