Intelligent calibration device for field angle of infrared temperature measurement sensor

Abstract

The utility model relates to the related technical field of thermal imaging, in particular to an intelligent calibration device for the field angle of an infrared temperature measurement sensor, which comprises a support frame and an imager fixedly arranged on the support frame, a measuring hole is formed in the imager, the measuring hole is in threaded connection with an adjusting cylinder, and the adjusting cylinder is controlled to move by a driving assembly which establishes communication with the imager so as to change the position of an objective lens arranged in the adjusting cylinder; the positioning assembly is installed in the measuring hole and comprises a reciprocating moving part and a cross wire plate connected with the reciprocating moving part, the position of the objective lens is adjusted by controlling the movement of the adjusting cylinder, meanwhile, the reciprocating moving part is extruded in a reciprocating mode, the cross wire plate is driven to move in a reciprocating mode in the radial direction of the measuring hole, and after focusing is finished, the cross wire plate is driven to move in a reciprocating mode. And the cross wire plate moves out of the range between the objective lens and the ocular lens, so that the measurement accuracy is ensured, and the shooting quality of the imaging instrument on the target object is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of thermal imaging technology, specifically an intelligent calibration device for the field of view of an infrared temperature sensor. Background Technology

[0002] An infrared temperature sensor is a non-contact temperature measurement device based on the principle of infrared radiation. Its main function is to calculate the surface temperature of an object by receiving the infrared radiation energy emitted by the target object. Infrared temperature sensors require photographing the object during temperature measurement, primarily due to the principles and application requirements of infrared imaging technology. This technology captures the infrared radiation energy emitted by the object's surface and converts it into a visualized thermal image, thereby enabling temperature measurement and analysis.

[0003] Infrared temperature sensors receive the radiant energy of the object being measured through their optical system (i.e., field of view) and calculate the average temperature. If the object being measured does not completely cover the sensor's field of view, or if the field of view is too large and causes background temperature interference, it will lead to measurement errors.

[0004] By calibrating the field of view, reliable temperature data from the sensor at different distances can be ensured. Field of view calibration enables the optical system and imaging device to cover the target being measured. Normally, it involves three main steps: calculating the field of view (calculated based on the range of the target being measured), preparing the imaging device (using the imaging device to take pictures and using a standard-sized marker plate with scales or grids for data measurement), and adjustment (including adjusting the imaging focal length to ensure the markings on the standard plate are clear). When adjusting the focal length, the crosshair plate can help the user determine whether there is relative movement between the target image and the crosshairs, thereby eliminating parallax by repeatedly adjusting the focal length and ensuring the accuracy of the measurement results. However, after focusing, the presence of the crosshairs may interfere with the quality of the thermal imaging image, affecting the image clarity. Utility Model Content

[0005] The purpose of this invention is to provide an intelligent calibration device for the field of view of an infrared temperature sensor, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An intelligent calibration device for the field of view of an infrared temperature sensor includes a support frame and an imager fixedly mounted on the support frame.

[0008] The imager has a measuring hole, and an adjusting cylinder is threaded onto the measuring hole. The adjusting cylinder is controlled to move by a drive component that communicates with the imager, so as to change the position of the objective lens set inside the adjusting cylinder.

[0009] A positioning component, installed inside the measuring hole, includes a reciprocating moving part and a crosshair plate connected to the reciprocating moving part. When the adjusting cylinder rotates, it reciprocates and presses the reciprocating moving part. The crosshair plate can be offset radially along the measuring hole.

[0010] The infrared temperature sensor field of view intelligent calibration device as described above: the driving component includes a knob arranged along the axial direction of the adjusting cylinder and fixed to the adjusting cylinder, and the rotation of the knob is driven by a reduction motor arranged on the imager, and the reduction motor establishes communication with the imager.

[0011] As described above, the infrared temperature sensor field of view intelligent calibration device has a first limiting ring rotatably installed inside the measuring hole and slidably connected to the adjusting cylinder. The first limiting ring has a plurality of first locking teeth arranged along its circumference that can reciprocately squeeze the reciprocating moving part.

[0012] The infrared temperature sensor field of view intelligent calibration device as described above: the reciprocating moving part includes:

[0013] A connecting shaft tube is arranged axially along the measuring hole and fixed to the inner wall of the measuring hole. An L-shaped connecting plate is fixedly connected to the connecting shaft tube, and a movable plate fixed to the crosshair plate is slidably arranged on the connecting plate.

[0014] The second limiting ring is slidably disposed on the connecting shaft tube, and the second limiting ring is provided with multiple sets of second teeth that mesh with the first teeth along the circumference. The end of the second limiting ring is hinged to a connecting rod, and the end of the connecting rod away from the second limiting ring is hinged to a protruding post disposed on the movable plate.

[0015] A spring is sleeved on the connecting shaft tube, with one end of the spring abutting against the connecting shaft tube and the other end abutting against the end of the second limiting ring away from the second retaining tooth.

[0016] The infrared temperature sensor field of view intelligent calibration device described above: at least one set of strip grooves is formed on the connecting shaft tube, and a strip block that slides with the strip grooves is provided on the second limiting ring.

[0017] The infrared temperature sensor field of view intelligent calibration device described above: a sensor for measuring the temperature of the target object is fixedly installed on the imager, and the sensor's activation system establishes communication with the imager.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] By comparing the image of the target object captured by the imager with its set resolution, if the set image resolution is not achieved, the imager can control the adjustment cylinder to rotate. With the threaded engagement, the adjustment cylinder rotates relative to the measuring hole and moves linearly along the axis of the measuring hole, causing a change in the distance between the objective lens and the eyepiece, thereby adjusting the field of view of the imager. At the same time as the adjustment cylinder rotates, it reciprocates and compresses the reciprocating moving part. When the reciprocating moving part moves back and forth along the axis of the measuring hole, it compresses the crosshair plate to move back and forth along the radial direction of the measuring hole, thereby causing the crosshair plate to move back and forth between the objective lens and the eyepiece. After focusing, the crosshair plate moves to outside the range between the objective lens and the eyepiece, avoiding the presence of the crosshair plate from affecting the imager's shooting, ensuring measurement accuracy without affecting the image quality of the target object captured by the imager. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the intelligent calibration device for the field of view of an infrared temperature sensor.

[0021] Figure 2 This is a cross-sectional schematic diagram of the imager in the intelligent calibration device for the field of view of the infrared temperature sensor.

[0022] Figure 3 This is a schematic diagram of the measuring hole and adjusting cylinder in the intelligent calibration device for the field of view of an infrared temperature sensor.

[0023] Figure 4 This is a schematic diagram of the first limiting ring in the intelligent calibration device for the field of view of an infrared temperature sensor.

[0024] Figure 5 This is a schematic diagram of the reciprocating moving parts in the intelligent calibration device for the field of view of an infrared temperature sensor.

[0025] In the diagram: 1. Support frame; 2. Imager; 3. Sensor; 4. Adjustment cylinder; 5. Objective lens; 6. Eyepiece; 7. Knob; 8. First limiting ring; 801. Limiting groove; 802. First locking tooth; 9. Second limiting ring; 901. Strip block; 902. Second locking tooth; 10. Connecting shaft tube; 1001. Strip groove; 11. Spring; 12. Cross screw plate; 13. Connecting plate; 14. Movable plate; 1401. Protruding post; 15. Connecting rod. Detailed Implementation

[0026] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0028] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0029] Please see Figures 1-5 In this embodiment of the present invention, an intelligent calibration device for the field of view of an infrared temperature sensor includes a support frame 1 and an imager 2 fixedly mounted on the support frame 1.

[0030] The imager 2 has a measuring hole, and an adjusting cylinder 4 is threadedly connected to the measuring hole. The adjusting cylinder 4 is controlled to move by a drive component that communicates with the imager 2, so as to change the position of the objective lens 5 set in the adjusting cylinder 4.

[0031] The positioning component, installed in the measuring hole, includes a reciprocating moving part and a crosshair plate 12 connected to the reciprocating moving part. When the adjusting cylinder 4 rotates, it reciprocates and presses the reciprocating moving part. The crosshair plate 12 can be offset radially along the measuring hole.

[0032] In this embodiment, before measuring the target position, the target object needs to completely cover the field of view of the imager 2. At this time, the image captured by the imager 2 of the target object is compared with its set resolution. If the set image resolution is not achieved, the imager 2 can control the adjustment cylinder 4 to rotate. With the threaded engagement, the adjustment cylinder 4 rotates relative to the measuring hole and moves linearly along the axis of the measuring hole, causing the distance between the objective lens 5 and the eyepiece 6 to change, thereby completing the adjustment of the field of view of the imager 2. At the same time as the adjustment cylinder 4 rotates, it reciprocates and squeezes the reciprocating moving part. When the reciprocating moving part moves back and forth along the axis of the measuring hole, it squeezes the crosshair plate 12 to move back and forth along the radial direction of the measuring hole, thereby causing the crosshair plate 12 to move back and forth between the objective lens 5 and the eyepiece 6. After focusing, the crosshair plate 12 moves to outside the range between the objective lens 5 and the eyepiece 6, avoiding the presence of the crosshair plate 12 from affecting the image capture of the imager 2, ensuring measurement accuracy without affecting the image quality of the target object captured by the imager 2.

[0033] For further solutions to this utility model, please refer to [link / reference]. Figure 2The drive assembly includes a knob 7 that is axially arranged along the adjusting cylinder 4 and fixed to the adjusting cylinder 4, and the rotation of the knob 7 is driven by a reduction motor arranged on the imager 2, and the reduction motor establishes communication with the imager 2.

[0034] A first limiting ring 8 is rotatably installed inside the measuring hole and slidably connected to the adjusting cylinder 4. The first limiting ring 8 has a plurality of first locking teeth 802 arranged along the circumference to reciprocately squeeze the reciprocating moving part.

[0035] The reciprocating moving part includes:

[0036] A connecting shaft tube 10 is arranged along the axial direction of the measuring hole and fixed to the inner wall of the measuring hole. A connecting plate 13 with an L-shaped structure is fixedly connected to the connecting shaft tube 10. A movable plate 14 fixed to the cross screw plate 12 is slidably arranged on the connecting plate 13.

[0037] The second limiting ring 9 is slidably disposed on the connecting shaft tube 10, and the second limiting ring 9 is provided with multiple sets of second locking teeth 902 along the circumference that mesh with the first locking teeth 802. The end of the second limiting ring 9 is hinged to a connecting rod 15, and the end of the connecting rod 15 away from the second limiting ring 9 is hinged to a protrusion 1401 disposed on the movable plate 14.

[0038] Spring 11 is sleeved on the connecting shaft tube 10. One end of the spring 11 abuts against the connecting shaft tube 10, and the other end abuts against the end of the second limiting ring 9 away from the second retaining tooth 902.

[0039] Preferably, at least one set of strip grooves 1001 are formed on the connecting shaft tube 10, and the second limiting ring 9 is provided with a strip block 901 that slides with the strip grooves 1001.

[0040] The inner ring of the adjusting cylinder 4 is provided with at least one set of limiting blocks, and the outer wall of the first limiting ring 8 is formed with a limiting groove 801 that is slidably connected to the limiting blocks. With the cooperation of the limiting blocks and the limiting groove 801, the adjusting cylinder 4 can move relative to the first limiting ring 8, and the first limiting ring 8 can rotate synchronously when the adjusting cylinder 4 rotates, and the position of the first limiting ring 8 is always changing.

[0041] Specifically, when the adjusting cylinder 4 rotates relative to the measuring hole, the rotation of the adjusting cylinder 4 can drive the first limiting ring 8 to rotate synchronously. At this time, the inclined surface of the first locking tooth 802 presses against the inclined surface of the second locking tooth 902. The second limiting ring 9 is restricted by the connecting shaft tube 10 and cannot rotate synchronously with the rotation of the first limiting ring 8. Under the action of the spring 11, the second limiting ring 9 moves linearly along the axial direction of the connecting shaft tube 10 until the triangular tip formed by the second locking tooth 902 and the triangular tip formed by the first locking tooth 802 are on the same horizontal plane. Then the first limiting ring 8 continues to rotate, and under the action of the spring 11, the second locking tooth 902 returns to its original position. The second limiting ring 9 is moved back and forth within the placement groove formed by the first locking tooth 802. Under the pull of the connecting rod 15, when the tip of the second locking tooth 902 is at the same horizontal plane as the tip of the first locking tooth 802, the crosshair plate 12 is completely outside the range between the objective lens 5 and the eyepiece 6. When the second locking tooth 902 is completely in the placement groove, the crosshair plate 12 is in the middle position between the objective lens 5 and the eyepiece 6. Thus, when focusing the objective lens 5, the crosshair plate 12 moves back and forth between the objective lens 5 and the eyepiece 6. After focusing, the crosshair plate 12 is hidden to avoid the presence of the crosshair plate 12 affecting the image quality of the imager 2.

[0042] It should be noted that when the adjusting cylinder 4 is not rotating, the second locking tooth 902 acts as a limit to the first locking tooth 802. In the initial state, the spring 11 is in a compressed state to prevent the adjusting cylinder 4 from rotating under external force when shooting after focusing.

[0043] As a further embodiment of this invention, a sensor 3 for measuring the temperature of the target object is fixedly installed on the imager 2, and the activation system of the sensor 3 establishes communication with the imager 2.

[0044] Temperature markers are typically used to indicate critical parts or abnormal areas of a target object. When the image is clear and the target object completely covers the field of view, temperature markers are easier to identify and analyze, and a clear image can help operators quickly locate abnormal areas and take appropriate measures.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent calibration device for the field of view of an infrared temperature sensor, comprising a support frame (1) and an imager (2) fixedly mounted on the support frame (1), characterized in that... ； The imager (2) has a measuring hole, and an adjusting cylinder (4) is threaded onto the measuring hole. The adjusting cylinder (4) is controlled to move by a drive component that communicates with the imager (2) to change the position of the objective lens (5) set inside the adjusting cylinder (4). The positioning component, installed in the measuring hole, includes a reciprocating moving part and a cross screw plate (12) connected to the reciprocating moving part. When the adjusting cylinder (4) rotates, it reciprocates and squeezes the reciprocating moving part. The cross screw plate (12) can be offset radially along the measuring hole.

2. The infrared temperature sensor field-of-view intelligent calibration device according to claim 1, characterized in that, The drive assembly includes a knob (7) arranged axially along the adjusting cylinder (4) and fixed to the adjusting cylinder (4), and the rotation of the knob (7) is driven by a reduction motor arranged on the imager (2), and the reduction motor establishes communication with the imager (2).

3. The infrared temperature sensor field-of-view intelligent calibration device according to claim 1, characterized in that, The measuring hole is rotatably installed with a first limiting ring (8) that is slidably connected to the adjusting cylinder (4). The first limiting ring (8) is provided with a plurality of first locking teeth (802) along the circumference that can reciprocate and squeeze the reciprocating moving part.

4. The infrared temperature sensor field-of-view intelligent calibration device according to claim 3, characterized in that, The reciprocating moving parts include A connecting shaft tube (10) is arranged along the axial direction of the measuring hole and fixed to the inner wall of the measuring hole. A connecting plate (13) with an L-shaped structure is fixedly connected to the connecting shaft tube (10). A movable plate (14) fixed to the cross screw plate (12) is slidably arranged on the connecting plate (13). The second limiting ring (9) is slidably disposed on the connecting shaft tube (10), and the second limiting ring (9) is provided with multiple sets of second locking teeth (902) that mesh with the first locking teeth (802) along the circumference. The end of the second limiting ring (9) is hinged to a connecting rod (15), and the end of the connecting rod (15) away from the second limiting ring (9) is hinged to a protrusion (1401) disposed on the movable plate (14). Spring (11) is sleeved on the connecting shaft tube (10). One end of the spring (11) abuts against the connecting shaft tube (10), and the other end abuts against the end of the second limiting ring (9) away from the second retaining tooth (902).

5. The infrared temperature sensor field-of-view intelligent calibration device according to claim 4, characterized in that, At least one set of strip grooves (1001) are formed on the connecting shaft tube (10), and a strip block (901) is provided on the second limiting ring (9) to slide in cooperation with the strip groove (1001).

6. The infrared temperature sensor field-of-view intelligent calibration device according to claim 1, characterized in that, The imager (2) is fixedly equipped with a sensor (3) for measuring the temperature of the target object, and the starting system of the sensor (3) establishes communication with the imager (2).

Images