Uncooled infrared thermal imager image uniformity test tool

Abstract

The utility model discloses an image uniformity test tool for an uncooled thermal infrared imager, which comprises a black body, and a black body radiation window is arranged on one side of the black body. A sleeve is arranged on one side of the black body, and the lens and the thermal imager are installed in the sleeve. The black body radiation window is arranged in the black body main body, one side of the sleeve is in contact with one side surface of the black body main body, and the sleeve covers the outer side of the black body radiation window, so that the lens and a black body radiation surface in the black body radiation window are isolated from the external environment. One side surface of the sleeve is contacted with one side of the blackbody main body, so that a lens, a blackbody radiation window and an external test environment are isolated, wind disturbance, an external interference radiation source and radiation interference of floating personnel in a test are prevented, and the problem that a lens and a blackbody radiation surface in an existing test are not effectively isolated from the external environment; and a test result numerical value generates abnormal jump, so that the device is judged abnormally.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared thermal imagers, and particularly relates to a non-cooled infrared thermal imager image uniformity test tooling. Background Technique

[0002] Non-cooled infrared thermal imagers are widely used in the fields of industrial inspection, medical diagnosis, security monitoring, building inspection, temperature measurement, etc. Among them, the image uniformity of the thermal imager, as an evaluation index for the imaging quality of the non-cooled infrared thermal imager, is generally defined as the root mean square deviation of the effective pixel response of the thermal imager under the condition of uniform thermal radiation.

[0003] At present, for the test of the image uniformity of the thermal imager, usually after the detector is connected to the lens, it is directly aimed at the blackbody radiation surface for testing. During the test process, the lens and the blackbody radiation surface are not effectively isolated from the external environment. During the test process, wind disturbance or radiation interference from external testers or moving personnel occurs, and the test result value will jump abnormally, resulting in abnormal determination of the device. Content of the Utility Model

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a non-cooled infrared thermal imager image uniformity test tooling.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A non-cooled infrared thermal imager image uniformity test tooling includes a blackbody main body, and a blackbody radiation window is arranged on one side of the blackbody main body; a base is installed on one side of the blackbody main body, a support structure is arranged on the top of the base, a sleeve is connected to the top of the support structure, and an installation structure is arranged inside the sleeve, and the lens and the thermal imager are installed inside the sleeve by using the installation structure;

[0007] One side of the sleeve is in contact with one side surface of the blackbody main body, and the sleeve covers the outside of the blackbody radiation window, so that the lens and the blackbody radiation surface in the blackbody radiation window are isolated from the external environment.

[0008] Further, the installation structure includes an inner cylinder, the outer wall of the inner cylinder is slidably connected with the inner wall of the sleeve, a flange plate is detachably installed on one side surface inside the inner cylinder, a first threaded hole is opened on one side of the flange plate for installing the thermal imager, and a second threaded hole is opened in the middle of the flange plate for installing the lens;

[0009] The outer surface of the sleeve is provided with a positioning groove; one side of the inner cylinder is connected with a positioning stopper, one side of the positioning stopper is slidably connected with the inner wall of the sleeve, the position of the positioning stopper inside the sleeve corresponds to the position of the positioning groove, and one side of the positioning stopper is threadedly connected with a locking assembly. The top of the locking assembly penetrates through the positioning groove for fixing the positioning stopper.

[0010] Furthermore, a shielding cover is slidably connected to the outer wall of the sleeve, and one side of the shielding cover is in contact with one side of the black body main body for shielding the positioning groove.

[0011] Furthermore, two sets of mounting grooves are symmetrically formed at the top of the base, and two sets of mounting stoppers are symmetrically arranged at the top of the base. Both the two sets of mounting stoppers and the two sets of mounting grooves are connected by bolts. The two mounting stoppers are symmetrically distributed on both sides of the black body main body for fixing the base on the black body main body.

[0012] Furthermore, the support structure includes a lifting rod. The bottom of the lifting rod is arranged on the base, the top of the lifting rod is connected with a support seat, and the top of the support seat is connected with the outer wall of the sleeve.

[0013] Furthermore, an automatic adjustment mechanism is arranged between the lifting rod and the base for calibrating the relative positions of the sleeve and the black body radiation window;

[0014] The automatic adjustment mechanism includes an adjustment table, and a driving assembly is arranged on one side of the adjustment table for driving the adjustment table to move;

[0015] A code scanner is arranged on the side of the adjustment table close to the black body main body;

[0016] A distance sensor is arranged on the side of the sleeve close to the black body main body.

[0017] Furthermore, the driving assembly includes a first driving structure installed on the base. The output end of the first driving structure is connected with a threaded rod. One side of the threaded rod is threadedly connected with a threaded column. The bottom of the threaded column is slidably connected with the base. One side of the threaded column is connected with a second driving structure, and one end of the second driving structure is connected with the adjustment table.

[0018] Compared with the prior art, the non-cooled infrared thermal imager image uniformity test tooling has the following beneficial effects:

[0019] 1. When the present utility model conducts image uniformity testing, the radiation window of the box body and the lens are covered by a sleeve, and one side of the sleeve is in contact with one side of the black body main body, isolating the lens, the black body radiation window from the external testing environment, preventing wind disturbance, external interference radiation sources, and radiation interference from flowing personnel during the test, and solving the problem that in existing tests, the lens and the black body radiation surface are not effectively isolated from the external environment, resulting in abnormal fluctuations in the test result values and causing abnormal device determination.

[0020] 2. The present utility model is provided with a positioning groove at the top of the sleeve, and the positioning stop block is positioned and controlled by a screw passing through the positioning groove, facilitating the front and back movement of the inner cylinder and the lens relative to the radiation surface, and facilitating the quick adjustment of the depths of the lens and the black body radiation source to be compatible and matched with each other.

[0021] 3. The present utility model is provided with a movable mounting stop block on the base, facilitating the fitting of the base with the black body part. At the same time, when installing black body main bodies of different models, the mounting stop block can be adjusted to make the center of the tooling coincide with the center of the black body, thereby ensuring test consistency. Description of the Drawings

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0023] Figure 2 is a cross-sectional view of the flange plate in the present utility model;

[0024] Figure 3 is a cross-sectional view of the sleeve in the present utility model;

[0025] Figure 4 is a three-dimensional structural schematic diagram of the adjustment table in the present utility model;

[0026] Figure 5 is a three-dimensional structural schematic diagram of the threaded post in the present utility model.

[0027] In the figure: 1. Black body main body; 2. Black body radiation window; 3. Base; 4. Sleeve; 5. First threaded hole; 6. Second threaded hole; 7. Inner cylinder; 8. Flange plate; 9. Positioning groove; 10. Locking assembly; 11. Shielding cover; 12. Positioning stop block; 13. Threaded post; 14. Installation groove; 15. Mounting stop block; 16. Lifting rod; 17. Support seat; 18. Adjustment table; 19. Scanner; 20. Threaded rod. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figures 1-5 shown, the present invention provides a technical solution: a non-cooled infrared thermal imager image uniformity test tooling, including a blackbody main body 1, and a blackbody radiation window 2 is provided on one side of the blackbody main body 1; a base 3 is installed on one side of the blackbody main body 1, and the base 3 and the blackbody radiation window 2 are located on the same side. A support structure is provided on the top of the base 3, and a sleeve 4 is connected to the top of the support structure. A movable mounting structure is provided inside the sleeve 4. One side of the mounting structure is used to mount a lens, and the lens is located between the blackbody radiation window 2 and the mounting structure. The other side of the mounting structure is used to mount a thermal imager; one side of the sleeve 4 is in contact with one side surface of the blackbody main body 1, and the sleeve 4 covers the outside of the blackbody radiation window 2, so that the blackbody radiation surface in the lens and the blackbody radiation window 2 is isolated from the external environment; during the image uniformity test, the sleeve 4 is installed on one side of the blackbody main body 1 through the base 3, and the sleeve 4 covers the blackbody radiation window 2, ensuring that the blackbody radiation surface and the lens are isolated from the external test environment, eliminating the wind disturbance, external interference radiation sources and radiation interference of flowing personnel during the test, ensuring the reliability and stability of the test results, and solving the abnormal test situation caused by external interference in the image uniformity test.

[0030] The mounting structure includes an inner cylinder 7. The outer wall of the inner cylinder 7 is slidably connected to the inner wall of the sleeve 4. A Faraday disk is detachably installed on one side surface inside the inner cylinder 7. A first threaded hole 5 is provided on one side of the Faraday disk for installing a thermal imager, and a second threaded hole 6 is provided in the middle of the Faraday disk for installing a lens; a positioning groove 9 is provided on the outer surface of the sleeve 4; a positioning block 12 is connected to one side surface of the inner cylinder 7. One side of the positioning block 12 is slidably connected to the inner wall of the sleeve 4. The position of the positioning block 12 inside the sleeve 4 corresponds to the position of the positioning groove 9. A locking assembly 10 is threadedly connected to one side of the positioning block 12. The top of the locking assembly 10 penetrates through the positioning groove 9 for fixing the positioning block 12.

[0031] During use, the locking assembly 10 can adopt a threaded rod 20 with a disk sleeved on the outside. The size of the disk is larger than the width of the positioning groove 9. The threaded rod 20 is threadedly connected with the positioning stop block 12. By rotating the threaded rod 20, the threaded rod 20 moves downward, thereby driving the disk to press against the outer surface of the sleeve 4, locking the sliding positioning stop block 12. Screws can also be used. By loosening and tightening the screws on the positioning stop block 12, the positioning stop block 12 is moved back and forth in the positioning groove 9, thereby realizing the forward and backward movement of the inner cylinder 7 and the lens relative to the radiation surface, enabling the tooling to be appropriately adjusted according to the size of the lens and the depth of the blackbody radiation source, making the two compatible;

[0032] The inner cylinder 7 and the flange 8 can be detachably connected by bolts. At the same time, the inside of the inner cylinder 7 is connected to the thermal imager and the lens through the Faraday disk. There are multiple Faraday disks. The first threaded holes 5 and the second threaded holes 6 on the flange 8 are set with corresponding sizes and positions according to different models of thermal imagers and lenses, so that when using different thermal imagers and lenses, only by replacing the corresponding Faraday disk, the corresponding thermal imager and lens can be installed to adapt to different models of thermal imagers and different lenses.

[0033] A shielding cover 11 is slidably connected to the outer wall of the sleeve 4. One side of the shielding cover 11 is in contact with one side of the blackbody main body 1, and is used to shield the positioning groove 9; the shape of the shielding cover 11 is arc-shaped, and the part corresponding to the positioning groove 9 bulges upward. The upwardly bulging part is higher than the threaded rod 20 or the screw, so as to be easy to cover. After the positioning stop block 12 is locked and fixed, by sliding the shielding cover 11, the shielding cover 11 is moved above the positioning groove 9, and one side is in contact with one side surface of the blackbody main body 1, thereby shielding the screw positioning groove 9.

[0034] Two sets of mounting grooves 14 are symmetrically opened at the top of the base 3. Two sets of mounting blocks 15 are symmetrically arranged at the top of the base 3. Both the two sets of mounting blocks 15 and the two sets of mounting grooves 14 are connected by bolts. The two mounting blocks 15 are symmetrically distributed on both sides of the blackbody main body 1 and are used to fix the base 3 on the blackbody main body 1; during use, by adjusting the mounting blocks 15 left and right, it is convenient to make appropriate adjustments according to different blackbody main bodies 1, so that the working center coincides with the center of the blackbody main body 1, and then the mounting blocks 15 are fixed by bolts. At the same time, one side of the base 3 is in contact with the front part of the blackbody main body 1, and one side surface of the base 3 is coplanar with one side surface of the sleeve 4, so as to facilitate the contact and fitting of the sleeve 4 with the box body main body 1 to cover the blackbody radiation window.

[0035] The support structure includes a lifting rod 16. The bottom of the lifting rod 16 is arranged on the base 3. A support seat 17 is connected to the top of the lifting rod 16. The top of the support seat 17 is connected to the outer wall of the sleeve 4. The support seat 17 and the sleeve 4 are fixedly connected, or can be integrally formed. The lifting rod 16 can be an electric push rod. By driving the support seat 17 to move up and down with the electric push rod, the height of the sleeve 4 can be adjusted to facilitate the sleeve 4 to cover the outside of the blackbody radiation window 2 and adapt to the blackbody radiation windows 2 on different blackbody bodies.

[0036] An automatic adjustment mechanism is arranged between the lifting rod 16 and the base 3 for calibrating the relative positions of the sleeve 4 and the blackbody radiation window 2. The automatic adjustment mechanism includes an adjustment table 18. A driving component is arranged on one side of the adjustment table 18 for driving the adjustment table 18 to move. A barcode scanner 19 is arranged on the side of the adjustment table 18 close to the blackbody main body 1. A distance sensor is arranged on the side of the sleeve 4 close to the blackbody main body 1. A controller is installed on the base 3 for coordinating and controlling the work of each component. During use, first, a two-dimensional code, barcode, etc. are pasted on the side of the blackbody main body 1 where the base 3 is installed. The information stored in the two-dimensional code includes the width and height of the corresponding blackbody main body 1, the height and width of the blackbody radiation window 2, and the axis position, etc. Information. A coordinate system can also be established with the blackbody radiation window 2 as the origin of the coordinate system, recording the relative position relationship between the two-dimensional code and the blackbody radiation window 2, and the height of the two-dimensional code is adapted to the height of the scanner. The distance sensor uses an infrared laser distance sensor to measure the distance between the blackbody main body 1 and the sleeve 4 to facilitate the positioning of the sleeve 4.

[0037] The driving component includes a first driving structure installed on the base 3. The output end of the first driving structure is connected to a threaded rod 20. A threaded column 13 is threadedly connected to one side of the threaded rod 20. The bottom of the threaded column 13 is slidably connected to the base 3. One side surface of the threaded column 13 is connected to a second driving structure. One end of the second driving structure is connected to the adjustment table 18. A limiting groove is opened on the base 3. The inner wall of the limiting groove is slidably connected to the threaded column 13 for restricting the rotation of the threaded column 13. Installation blocks are rotatably connected to the end positions of the threaded rod 20 close to both ends. One side of the installation block is fixedly connected to the base 3. The axis of the threaded rod 20 is perpendicular to the direction of the connection line between the base 3 and the blackbody main body 1. The telescopic direction of the second driving structure is perpendicular to the axis of the threaded rod 20, driving the adjustment table 18 to approach or move away from the blackbody main body 1. The first driving structure uses a motor, and a self-locking mechanism is arranged at the outer tail. The second driving structure uses an electric push rod.

[0038] Drive the threaded rod 20 to rotate through the electric motor. Under the restriction of the limit groove, the threaded column 13 moves horizontally on the threaded rod 20, thereby driving the adjustment table 18 to move along the axis direction of the threaded rod 20. At the same time, control the electric push rod to drive the adjustment table 18 to approach the black body main body 1. After moving to an appropriate position, the code scanner 19 scans the QR code. Then, after recognizing the QR code and obtaining the information of the black body main body 1, adjust the adjustment table 18 to an appropriate position through the electric motor. Then, control the lifting rod 16 to work to adjust the sleeve 4 to an appropriate height. Then, control the electric push rod to drive the adjustment table 18 to approach the black body main body 1, and at the same time drive the sleeve 4 to approach the black body main body 1. At the same time, use the distance sensor for calibration to make the sleeve 4 fit on the black body main body 1.

Claims

1. An uncooled infrared thermal imager image uniformity test tool, comprising a black body main body (1), a black body radiation window (2) being arranged on one side of the black body main body (1); a base (3) being installed on one side of the black body main body (1), characterized in that: A support structure is provided on the top of the base (3), a sleeve (4) is connected to the top of the support structure, a mounting structure is provided inside the sleeve (4), and a lens and a thermal imager are mounted inside the sleeve (4) using the mounting structure; One side of the sleeve (4) contacts one side of the black body main body (1), and the sleeve (4) covers the outside of the black body radiation window (2), so that the lens and the black body radiation surface in the black body radiation window (2) are isolated from the external environment.

2. The uncooled infrared thermal imager image uniformity test tool according to claim 1, characterized in that: The mounting structure comprises an inner cylinder (7), the outer wall of the inner cylinder (7) being slidably connected to the inner wall of the sleeve (4), a Farah disc being detachably mounted on one side of the inner cylinder (7), a first threaded hole (5) being provided on one side of the Farah disc for mounting a thermal imager, and a second threaded hole (6) being provided in the middle of the Farah disc for mounting a lens; The outer surface of the sleeve (4) is provided with a positioning groove (9); a side surface of the inner tube (7) is connected with a positioning block (12); one side of the positioning block (12) is slidably connected to the inner wall of the sleeve (4); the position of the positioning block (12) inside the sleeve (4) corresponds to the position of the positioning groove (9); one side of the positioning block (12) is threadedly connected with a locking assembly (10); the top of the locking assembly (10) passes through the positioning groove (9) for fixing the positioning block (12).

3. The uncooled infrared thermal imager image uniformity test tool according to claim 2, characterized in that: The outer wall of the sleeve (4) is slidably connected with a shielding cover (11), and one side of the shielding cover (11) is in contact with one side of the black body (1) for shielding the positioning groove (9).

4. The uncooled infrared thermal imager image uniformity test tool according to claim 1, characterized in that: The top of the base (3) is symmetrically provided with two groups of mounting grooves (14), and the top of the base (3) is symmetrically provided with two groups of mounting blocks (15), the two groups of mounting blocks (15) and the two groups of mounting grooves (14) are connected by bolts, and the two mounting blocks (15) are symmetrically distributed on both sides of the black body (1) for fixing the base (3) on the black body (1).

5. The uncooled infrared thermal imager image uniformity test tool according to claim 1, characterized in that: The supporting structure comprises a lifting rod (16), the bottom of the lifting rod (16) is arranged on the base (3), the top of the lifting rod (16) is connected to a supporting seat (17), and the top of the supporting seat (17) is connected to the outer wall of the sleeve (4).

6. The uncooled infrared thermal imager image uniformity test tool according to claim 5, characterized in that: An automatic adjustment mechanism is provided between the lifting rod (16) and the base (3) for calibrating the relative positions of the sleeve (4) and the blackbody radiation window (2); The automatic adjustment mechanism comprises an adjustment platform (18), and a driving component is provided on one side of the adjustment platform (18) for driving the adjustment platform (18) to move; A barcode scanner (19) is provided on one side of the adjustment platform (18) close to the black body (1); A distance sensor is arranged on one side of the sleeve (4) close to the black body (1).

7. The uncooled infrared thermal imager image uniformity test tool according to claim 6, characterized in that: The driving assembly comprises a first driving structure mounted on the base (3); an output end of the first driving structure is connected to a threaded rod (20); one side of the threaded rod (20) is threadedly connected to a threaded column (13); the bottom of the threaded column (13) is slidably connected to the base (3); a side surface of the threaded column (13) is connected to a second driving structure; and one end of the second driving structure is connected to an adjustment platform (18).

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