Radiation thermometer calibration device and operation method

Abstract

The present invention discloses a radiation thermometer calibration device and an operation method thereof. The device comprises a bracket body, a first clamp and a second clamp, wherein the first clamp comprises a base, a support part, a first slide bar, a second slide bar, a first clamp bar, a second clamp bar and an adjustment mechanism, wherein the support part and the adjustment mechanism are both arranged on the base, one end of the first clamp bar is connected to the first slide bar, and the other end is connected to the support part, one end of the second clamp bar is connected to the second slide bar, and the other end is connected to the support part, a clamping space is formed between the first clamp bar, the second clamp bar and the support part, the first slide bar and the second slide bar are both connected to the adjustment mechanism, and the first clamp and the second clamp are both connected to the moving mechanism of the bracket body. The radiation thermometer calibration device can clamp thermometers of various shapes, thereby improving the application range of the radiation thermometer calibration device and facilitating improving the accuracy of measurement.

Description

Technical Field

[0001] The invention belongs to the field of temperature measurement, and in particular relates to a radiation thermometer verification and calibration device and an operation method. Background Art

[0002] A radiation thermometer is a non-contact temperature measuring instrument designed based on the correspondence between the thermal radiation characteristics of an object and its temperature (blackbody radiation law). During measurement, the temperature sensing element does not directly contact the object being measured and does not destroy the temperature field of the object being measured. The measured temperature is affected by factors such as the object's emissivity, the intermediate medium, and the measurement distance.

[0003] At present, radiation thermometers are increasingly widely used in various industries. The accuracy of their measurement results has an important impact on whether related work can be carried out smoothly. Therefore, the calibration of radiation thermometers is particularly important. In the calibration process of radiation thermometers, the position and posture of the thermometer under test when measuring with respect to the radiation source are very important to ensure that the calibration results are accurate and reliable.

[0004] At present, when domestic metrology technical institutions conduct verification and calibration work in accordance with the "JJG 856-2015 Verification Procedure for Working Radiation Thermometers", there are two operating modes: handheld and clamped. Among them, the handheld mode means that the verifier holds the thermometer under test and stands in front of the radiation source, adjusts the position and posture of the thermometer under test by the movement of the arm and wrist, and completes a series of operations such as aiming and repeatable measurement under the vision and subjective judgment of the human eye. The clamped operation mode means that the thermometer under test is fixed with a fixture, and the position and posture of the thermometer under test are gradually adjusted by the movement of mechanical parts. A series of operations such as aiming and measurement are also completed under the vision and subjective judgment of the human eye; the clamped mode is to use a fixture to clamp the thermometer for verification.

[0005] Although the hand-held method is flexible, it is difficult to maintain the posture of the hand-held thermometer, and it is impossible to ensure that the measurement area is consistent, resulting in poor measurement accuracy. In addition, during verification and calibration, the radiation thermometer is required to be located on the extension line of the central axis of the radiation source furnace cavity, and there is a clearly specified verification distance. The verification distances of different thermometers are also different. It is difficult for the hand-held method to strictly meet this requirement, which also leads to large measurement uncertainty.

[0006] The clamping method can improve the accuracy of measurement, but handheld radiation thermometers of different specifications have various appearances and shapes. The existing fixtures cannot adapt to radiation thermometers of various shapes with one fixture. Calibrators often need to configure multiple different fixtures at the same time. However, due to the limited types of current fixtures, they cannot fully adapt to radiation thermometers of various shapes. Summary of the invention

[0007] The object of the present invention is to provide a radiation thermometer verification and calibration device and an operating method, wherein the verification and calibration device can be installed with radiation thermometers of various shapes, thereby improving the versatility of the radiation thermometer verification and calibration device and facilitating improving the measurement accuracy and repeatability.

[0008] The technical solution is as follows:

[0009] A radiation thermometer verification and calibration device includes a bracket body, a first clamp and a second clamp, the first clamp includes a base, a support part, a first slide bar, a second slide bar, a first clamp bar, a second clamp bar and an adjustment mechanism, the support part and the adjustment mechanism are both arranged on the base, one end of the first clamp bar is connected to the first slide bar, and the other end is connected to the support part, one end of the second clamp bar is connected to the second slide bar, and the other end is connected to the support part, a clamping space is formed between the first clamp bar, the second clamp bar and the support part, the first slide bar and the second slide bar are both connected to the adjustment mechanism, the second clamp includes a fixed block with a fixing groove, a clamping mechanism and a lifting mechanism, the clamping mechanism and the lifting mechanism are both connected to the fixed block, a moving mechanism is provided on the bracket body, and the first clamp and the second clamp are both connected to the moving mechanism.

[0010] The thermometer to be tested is placed in the clamping space of the first clamp, and the first sliding bar and the second sliding bar are gradually brought together by controlling the adjustment mechanism, and the first clamp and the second clamp are gradually brought together. The thermometer to be tested is clamped between the first clamp and the second clamp. The cooperation of the first clamp and the second clamp can clamp thermometers of various shapes and types, thereby improving the application range of the radiation thermometer verification and calibration device, and at the same time making it difficult for the thermometer to loosen and affect the normal measurement, thereby improving the accuracy of the measurement; in addition, connecting the first clamp and the second clamp with the moving mechanism is conducive to the rapid translation, positioning and interchange of the first clamp and the second clamp.

[0011] In one embodiment, the first clamp and the second clamp are integrally arranged to form a long clamp, the material of the long clamp is an elastic material, the middle part of the long clamp is movably connected to the support part, one end of the long clamp is connected to the first slide bar, and the other end is connected to the second slide bar. The long clamp is made of elastic material, and can be deformed according to the thermometer to be tested when pressed against the thermometer to be tested, making it easier to adapt to the thermometer to be tested; the middle part of the long clamp is movably connected to the support part, which increases the freedom of horizontal movement of the two ends of the long clamp, which is conducive to the normal operation of the long clamp.

[0012] In one embodiment, the adjustment mechanism includes a first fixed column, a second fixed column and an adjustment member, the first fixed column and the second fixed column are both arranged on the base, a guide rod is connected between the first fixed column and the second fixed column, the first slide rod and the second slide rod are movably connected to the guide rod, and the adjustment member is arranged on the second fixed column and connected to the first slide rod and the second slide rod. Under the guidance of the guide rod, the first slide rod and the second slide rod both move along the guide rod in a specified direction, so that the long clamping strip can effectively clamp the thermometer.

[0013] In one embodiment, the adjusting member includes a fixed portion, a screwing portion and a movable portion, the fixed portion is arranged on the second fixed column, one end of the movable portion is provided with a thread, the screwing portion is provided with a threaded hole corresponding to the thread of the movable portion, the other end of the movable portion is fixedly connected to the first slide bar, the second slide bar is sleeved on the outer wall of the movable portion and is close to the screwing portion of the adjusting member. The movable portion is moved by rotating the screwing portion, when the screwing portion is rotated clockwise, the first slide bar and the second slide bar drive the long clamping strip to move toward the middle; when the screwing portion is rotated counterclockwise, the first slide bar and the second slide bar drive the long clamping strip to move toward both ends, so that the thermometer under test can be clamped and removed.

[0014] In one embodiment, the adjusting member includes a fixed portion, a screwing portion and a movable portion, the fixed portion is arranged on the second fixed column, the movable portion is provided with a first thread segment and a second thread segment, the threads of the first thread segment and the second thread segment are arranged in opposite directions, the first slide bar is provided with a threaded hole corresponding to the first thread segment, the second thread segment is provided with a threaded hole corresponding to the second thread segment, one end of the movable portion is fixedly connected to the screwing portion, and the other end is provided with a limit block. By rotating the screwing portion, the movable portion is driven to rotate, and during the rotation of the movable portion, the first slide bar and the second slide bar move relative to or in opposite directions, thereby driving the long clamping strip to move closer to the middle or to both ends, so as to achieve the clamping and removal of the thermometer to be tested; the setting of the limit hole prevents the slide bar from falling off the adjusting member.

[0015] In one embodiment, there are two guide rods, which are arranged flush along the longitudinal direction of the fixed column, and there is a gap between the two guide rods. One end of the first slide rod is movably connected to one of the guide rods, and the other end is movably connected to the other guide rod. One end of the second slide rod is movably connected to one of the guide rods, and the other end is movably connected to the other guide rod. Both ends of the first slide rod and the second slide rod are respectively connected to the two guide rods, so that the first slide rod and the second slide rod move along the guide direction of the guide rod, which is beneficial to the movement of the first slide rod and the second slide rod; at the same time, the first slide rod and the second slide rod are not easy to swing during the movement, which improves the stability of the first slide rod and the second slide rod during the movement.

[0016] In one embodiment, the clamping mechanism includes a positioning member and a pressing plate arranged in a fixed groove, a threaded hole is arranged on the side wall of the fixed block, a corresponding thread is arranged on the positioning member, the positioning member passes through the threaded hole and is movably connected to the pressing plate, one end of the lifting mechanism is connected to the fixed block, and the other end is connected to the moving mechanism. The reference thermometer is placed in the fixed groove, the movement of the pressing plate is controlled by controlling the positioning member, and the pressing plate is pressed against the reference thermometer, thereby completing the installation of the reference thermometer, which is easy to operate and can be adjusted in the position of the reference thermometer in conjunction with the lifting mechanism.

[0017] In one embodiment, the moving mechanism includes a first guide rail and a second guide rail, both of which are arranged on the bracket body, the first guide rail is arranged along the horizontal transverse direction of the bracket body, and the second guide rail is arranged along the horizontal longitudinal direction of the bracket body, and a connecting block is arranged on the second guide rail, and the first guide rail is movably connected to the second guide rail through the connecting block, and the first clamp and the second clamp are movably connected to the first guide rail. The first clamp and the second clamp are movable on the first guide rail and can move horizontally and transversely along the first guide rail, which is conducive to rapid translation and positioning and improves the flexibility of the clamp; the first guide rail moves along the second guide rail to adjust the distance between the clamp and the test point.

[0018] In one embodiment, the first guide rail is provided with a first slider and a second slider, the first fixture is movably connected to the first guide rail through the first slider, the second fixture is movably connected to the first guide rail through the second slider, and the first slider and the second slider are both provided with positioning members. The provision of the slider facilitates the movement of the first fixture and the second fixture on the first guide rail, and the positioning member is used to fix the position of the slider to prevent the first fixture and the second fixture from moving and affecting the normal measurement.

[0019] The operation method of the radiation thermometer verification and calibration device comprises the following steps:

[0020] a. Install the first fixture: install the first fixture on the moving mechanism;

[0021] b. Install the thermometer to be tested: place the thermometer to be tested in the clamping space of the first clamp, and control the adjustment mechanism to control the first slide bar and the second slide bar to move, thereby driving the first clamp bar and the second clamp bar to move, clamp the thermometer to be tested to a state where the posture can be adjusted, align the thermometer to be tested with the test point, and then control the adjustment mechanism to fix and maintain the posture of the thermometer to be tested;

[0022] c. Install the reference thermometer: place the reference thermometer in the fixing groove of the second fixture, fix the reference thermometer by adjusting the clamping mechanism, and adjust the position of the reference thermometer by the lifting mechanism;

[0023] d. Verification and calibration of temperature points: The second fixture equipped with the reference thermometer is first moved to the test position to measure the temperature reference value, and then the second fixture is moved away from the test position. Then the first fixture equipped with the thermometer to be tested is moved to the test position to measure the temperature value, and the measurement is repeated multiple times to obtain the temperature average value.

[0024] The radiation thermometer verification and calibration device provided by the present invention utilizes a clamp to fix the thermometer to be tested, has higher aiming accuracy, and improves the measurement accuracy; utilizes a long clamp bar to clamp the thermometer to be tested, can adapt to thermometers of various shapes, improves the application scope of the radiation thermometer verification and calibration device, and has significant versatility; by installing the radiation thermometer to the device, the posture of the thermometer to be tested can be flexibly, conveniently, and quickly adjusted and fixed, making the detection operation simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0026] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0027] Figure 1 It is a schematic diagram of the overall structure of the radiation thermometer verification and calibration device according to an embodiment of the present invention.

[0028] Figure 2 yes Figure 1 A is an enlarged schematic diagram.

[0029] Figure 3 It is a schematic diagram of the structure of the first clamp in the first embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of the structure of the first clamp in the second embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 10. bracket body; 20. first clamp; 21. base; 211. fixing hole; 22. support part; 23. first slide bar; 24. second slide bar; 25. long clamp bar; 251. first clamp bar; 252. second clamp bar; 30. second clamp; 31. fixing block; 32. fixing groove; 33. clamping mechanism; 331. adjusting member; 332. pressing plate; 34. lifting mechanism; 40. adjusting mechanism; 41. first fixing column; 42. second fixing column; 43. adjusting member; 431. fixing part; 432. screwing part; 433. movable part; 44. guide rod; 45. Limit block; 50. Moving mechanism; 51. First guide rail; 511. First positioning hole; 512. Second positioning hole; 52. Second guide rail; 53. Connecting block; 54. Scale; 60. First slider; 601. Tightening spring ball plunger; 61. Second slider; 611. Stop bolt; 70. Drive motor; 71. Linkage assembly; 72. Upper computer; 73. Lower computer; 80. Aiming mechanism; 81. Aiming ring; 82. Shielding plate; 83. Square frame; 84. Support screw; 85. Adjusting nut; 90. Radiation source; 91. Reference center. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0034] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In the case of combining the technical solution of the present invention with a realistic scenario, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solution of the present invention.

[0035] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0036] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0038] like Figures 1 to 4 As shown, the radiation thermometer calibration device includes a bracket body 10, a first clamp 20 and a second clamp 30, wherein the first clamp 20 includes a base 21, a support portion 22, a first slide bar 23, a second slide bar 24, a first clamp 251, a second clamp 252 and an adjustment mechanism 40, wherein the support portion 22 and the adjustment mechanism 40 are both arranged on the base 21, one end of the first clamp 251 is connected to the first slide bar 23, and the other end is connected to the support portion 22, one end of the second clamp 252 is connected to the second slide bar 24, and the other end is connected to the support portion 22, and the first clamp 251 is connected to the second slide bar 24. A clamping space is formed between the first clamp 251, the second clamp 252 and the support portion 22, the first clamp 251 and the second clamp 252 are integrally arranged and form a long clamp 25, the first slide bar 23 and the second slide bar 24 are both connected to the adjustment mechanism 40; the second clamp 30 includes a fixed block 31 with a fixed groove 32, a clamping mechanism 33 and a lifting mechanism 34, the clamping mechanism 33 and the lifting mechanism 34 are both connected to the fixed block 31; a moving mechanism 50 is provided on the bracket body 10, and the first clamp 20 and the second clamp 30 are both connected to the moving mechanism 50.

[0039] The thermometer to be tested is placed in the clamping space of the first clamp 20, and the first slide bar 23 and the second slide bar 24 are gradually brought together by controlling the adjustment mechanism 40, and at the same time, the first clamp bar 251 and the second clamp bar 252 are gradually brought together, and the thermometer to be tested is clamped between the first clamp bar 251 and the second clamp bar 252. The cooperation of the first clamp bar 251 and the second clamp bar 252 can clamp thermometers of various shapes and types to be tested, thereby improving the application range of the radiation thermometer verification and calibration device, and at the same time making it difficult for the thermometer to loosen and affect the normal measurement, thereby improving the accuracy of the measurement; in addition, connecting the first clamp 20 and the second clamp 30 with the moving mechanism 50 is conducive to rapid translation, positioning and interchange of positions.

[0040] In one of the embodiments, the long clamp 25 is an elastic sheet. When pressed against the thermometer to be tested, the long clamp 25 can be deformed according to the shape of the thermometer to be tested, making it easier to adapt to the thermometer to be tested; the middle part of the long clamp 25 is bent to form a depression and is movably connected to the support part 22. One end of the long clamp 25 is connected to the first slide bar 23, and the other end is connected to the second slide bar 24. By movably connecting the middle part of the long clamp 25 with the support part 22, the freedom of horizontal movement of the two ends of the long clamp 25 is improved, which is beneficial to the normal operation of the long clamp 25; there are two long clamps 25, and the two long clamps 25 are arranged longitudinally along the support part 22, which is beneficial to improving the stability of clamping and making the thermometer to be tested be clamped more tightly.

[0041] The radiation thermometer verification and calibration device works in conjunction with a radiation source 90, which is provided with a reference center 91 mark, which is an external reference point of the furnace cavity center marked on the surface of the radiation source 90 shell and is located in the same horizontal plane as the furnace cavity center to improve the accuracy of aiming of the thermometer being tested.

[0042] like Figure 3 or Figure 4 As shown, the support portion 22 of the first clamp 20 is provided with an aiming mechanism 80, and the aiming mechanism 80 includes an aiming ring 81, a shielding plate 82, a square frame 83, a support screw 84 and an adjusting nut 85. The shielding plate 82 is installed on the square frame 83 through a hinge to realize the opening and closing of the shielding plate 82. The aiming ring 81 is located above the shielding plate 82. The adjusting nut 85 is arranged on the support screw 84 to adjust the height of the square frame 83. The square frame 83 is adjusted by the support screw 84 and the adjusting nut 85. The nut 85 is connected to the support portion 22; before measurement, first close the shielding plate 82, the detection head of the tested thermometer is close to the shielding plate 82, the auxiliary aiming laser of the thermometer passes through the aiming ring 81 to aim at the reference center 91 of the radiation source 90, ensure that the posture of the tested thermometer meets the measurement requirements, the tested thermometer is aimed at the reference center 91 mark of the radiation source 90 through the aiming ring 81, and the shielding plate 82 is opened to block the tested thermometer for at least 30 seconds before measuring, so as to reduce measurement errors and improve accuracy.

[0043] The adjustment mechanism 40 includes a first fixed column 41, a second fixed column 42 and an adjustment member 43. The first fixed column 41 and the second fixed column 42 are both arranged on the base 21. A guide rod 44 is connected between the first fixed column 41 and the second fixed column 42. In one embodiment, two guide rods 44 are provided. The two guide rods 44 are arranged flush along the longitudinal direction of the fixed column, and a gap is provided between the two guide rods 44. The two ends of the first slide bar 23 and the second slide bar 24 are sleeved with the guide rod 44 through linear bearings, so that the first slide bar 23 and the second slide bar 24 can slide freely on the guide rod 44. The adjustment member 43 is arranged on the second fixed column 42 and is connected to the first slide bar 23 and the second slide bar 24. Both ends of the first slide bar 23 and the second slide bar 24 are respectively connected to the two guide rods 44, so that the first slide bar 23 and the second slide bar 24 move along the guide direction of the guide rod 44, which is beneficial to the synchronous movement of the first slide bar 23 and the second slide bar 24, so that the first slide bar 23 and the second slide bar 24 move more smoothly; at the same time, the first slide bar 23 and the second slide bar 24 are not easy to swing during the movement, thereby improving the stability of the first slide bar 23 and the second slide bar 24 during movement.

[0044] The adjusting member 43 includes a fixing portion 431, a screwing portion 432 and a movable portion 433. The fixing portion 431 is disposed on the second fixing column 42. Figure 3As shown, in one embodiment, the screwing portion 432 of the adjusting member 43 is a nut, the movable portion 433 is a stepped shaft with a thread at one end and an optical axis in the middle, the screwing portion 432 is provided with a threaded hole corresponding to the thread of the movable portion 433, the other end of the movable portion 433 is fixedly connected to the middle of the first slide bar 23, the middle of the second slide bar 24 is provided with a through hole, and is sleeved on the outer wall of the movable portion 433, and the second slide bar 24 is close to the screwing portion 432 of the adjusting member 43. By rotating the screwing portion 432 and thus moving the movable portion 433, when the screwing portion 432 is rotated clockwise, the first slide bar 23 and the second slide bar 24 drive the long clamping strip 25 to move toward the middle; when the screwing portion 432 is rotated counterclockwise, the first slide bar 23 and the second slide bar 24 drive the long clamping strip 25 to move toward both ends, making the clamping and removal operations of the thermometer to be tested more convenient and simple.

[0045] like Figure 4 As shown, in one embodiment, the movable part 433 is a shaft provided with a first thread segment and a second thread segment, and the threads of the first thread segment and the second thread segment are arranged in opposite directions. The first slide bar 23 is provided with a threaded hole corresponding to the first thread segment, and the second slide bar 24 is provided with a threaded hole corresponding to the second thread segment. One end of the movable part 433 is fixedly connected to the screwing part 432, and the other end is provided with a stop block 45. By rotating the screwing part 432, the movable part 433 is driven to rotate. During the rotation of the movable part 433, the first slide bar 23 and the second slide bar 24 move relative to or in opposite directions, thereby driving the long clamping strip 25 to move closer to the middle or to both ends, so as to achieve the clamping and removal of the thermometer under test; the stop hole limits the slide bar from falling off the adjusting member 43.

[0046] The clamping mechanism 33 includes a positioning member 331 and a pressing plate 332 disposed in the fixing groove 32. The positioning member 331 is a bolt. A threaded hole is disposed on the side wall of the fixing block 31. The positioning member 331 is provided with a corresponding thread. The positioning member 331 passes through the threaded hole and is movably connected to the pressing plate 332. The reference thermometer is placed in the fixing groove 32, and the movement of the pressing plate 332 is controlled by controlling the positioning member 331. The pressing plate 332 is pressed against the reference thermometer, thereby completing the installation of the reference thermometer, which is easy to operate. The lifting mechanism 34 adopts an existing X-shaped scissor lifting platform.

[0047] The moving mechanism 50 includes a first guide rail 51 and a second guide rail 52. The first guide rail 51 and the second guide rail 52 are both arranged on the bracket body 10. The first guide rail 51 and the second guide rail 52 are perpendicular to each other in the horizontal direction. The second guide rail 52 is parallel to the central axis of the furnace cavity of the radiation source 90. The first guide rail 51 is arranged along the horizontal transverse direction of the bracket body 10, and the second guide rail 52 is arranged along the horizontal longitudinal direction of the bracket body 10. The first guide rail 51 is provided with a first positioning hole 511 and a second positioning hole 512. The first positioning hole 511 is directly opposite to the center of the furnace cavity, and the second positioning hole 512 is directly opposite to the reference center 91. The hole spacing is equal to the center distance between the center of the furnace cavity and the reference center 91. The first guide rail 51 is also provided with a scale 54.

[0048] The second guide rail 52 is provided with a connecting block 53, the first guide rail 51 is movably connected to the second guide rail 52 through the connecting block 53, the first guide rail 51 is movably connected to a first slider 60 and a second slider 61, the first fixture 20 is movably connected to the first guide rail 51 through the first slider 60, one end of the lifting mechanism 34 of the second fixture 30 is connected to the fixing block 31, and the other end is connected to the second slider 61. In one embodiment, the base 21 is wedge-shaped, and fixing holes 211 are provided on both sides thereof to quickly install the first fixture 20, and the upper surface of the first slider 60 is provided with a wedge-shaped corresponding to the base 21. A groove (not shown in the figure) is provided with a locking spring ball plunger 601 on both sides of the groove. The first fixture 20 can be quickly installed and fixed by cooperating with the fixing hole 211 of the base 21 of the first fixture 20 through the wedge-shaped groove and the ball plunger. The first slider 60 is also provided with a locking spring ball plunger 601 which cooperates with the first positioning hole 511 and the second positioning hole 512 of the first guide rail 51 to quickly position the slider. The locking spring ball plunger 601 is a positioning member of the first slider 60. The positioning member of the second slider 61 is a stop bolt 611. By tightening the stop bolt 611 against the first guide rail 51, the second slider 61 can be prevented from moving.

[0049] The bracket body 10 is also provided with a driving motor 70, a linkage component 71, a host computer 72 and a lower computer 73. The driving motor 70 is connected to the connecting block 53 through the linkage component 71, and then drives the connecting block 53 to move by driving the linkage component 71, thereby driving the first guide rail 51 to move along the second guide rail 52. The linkage component 71 is a ball screw; the control of the driving motor 70 is achieved by sending instructions through the host computer 72 and the lower computer 73 executing the instructions. The calibration personnel sets the calibration distance through the host computer 72, and the lower computer 73 drives the driving motor 70 to move the first clamp 20 and the second clamp 30 to the specified position; the calibration process adopts program control and the driving motor 70 controls the calibration distance, which improves the automation and mechanization of the calibration and calibration operations, reduces the work intensity and improves the accuracy of the calibration, and at the same time realizes the electronicization of the certificate and the digitization of the data.

[0050] Embodiment 1:

[0051] like Figure 2 As shown, the adjusting member 43 of the first clamp 20 adopts a screwing portion 432 as a nut, and the movable portion 433 is a stepped shaft with a thread at one end and an optical axis in the middle. The screwing portion 432 is provided with a threaded hole corresponding to the thread of the movable portion 433, and the other end of the movable portion 433 is fixedly connected to the middle part of the first sliding rod 23. A through hole is opened in the middle part of the second sliding rod 24, and is sleeved on the outer wall of the movable portion 433. The second sliding rod 24 is close to the screwing portion 432 of the adjusting member 43.

[0052] The operating method of the radiation thermometer verification and calibration device comprises the following steps:

[0053] a. Install the reference center 91: First, adjust the position of the bracket body 10 so that the second guide rail 52 is parallel to the central axis of the furnace cavity of the radiation source 90 and the first positioning hole 511 of the first guide rail 51 is directly opposite to the center of the furnace cavity; then, mark the reference center 91 on the shell surface of the radiation source 90 at a horizontal position at a certain distance from the center of the furnace cavity, so that the reference center 91 is aligned with the second positioning hole 512 of the first guide rail 51.

[0054] b. Install the first fixture 20: Move the first slider 60 to position it on the second positioning hole 512 of the first guide rail 51 (corresponding to the reference center 91), place the first fixture 20 into the wedge groove of the first slider 60, and make the ball plunger on the first slider 60 fit into the fixing hole 211 on the first fixture 20.

[0055] c. Install the thermometer to be tested: put the thermometer to be tested into the first clamp 20, and control the first slide bar 23 and the second slide bar to move by controlling the adjustment mechanism 40, thereby driving the first clamp bar 251 and the second clamp bar 252 to move, and clamp the thermometer to be tested to a state where the cloth does not fall off but the posture can be adjusted. At this time, press the measurement key, and the thermometer to be tested will emit a red laser for auxiliary aiming. Adjust the posture of the thermometer so that the laser point falls on the reference center 91, and tighten the first clamp 20 at the same time to keep the aiming posture of the thermometer and make it firm enough; remove the first clamp 20 with the thermometer installed from the horizontal slider as a whole, and put it aside for measurement.

[0056] d. When there are multiple first fixtures 20 for multiple thermometers to be tested according to test requirements, repeat steps b and c to install the other thermometers to be tested.

[0057] e. Install the reference thermometer: Place the reference thermometer into the fixing groove 32 of the second fixture 30, move the second fixture 30 to the front of the center of the furnace cavity, and while using the eyepiece of the reference thermometer for observation, adjust the lifting mechanism 34 of the second fixture 30 and make necessary horizontal movements so that the reference thermometer probe is aimed at the center of the furnace cavity. Finally, adjust the clamping mechanism 33 to fix the reference thermometer, tighten the stop bolt 611 to prevent the slider from sliding, and at the same time observe the scale 54 and record the scale value of the second slider 61 on the first guide rail 51.

[0058] f. Measurement of oven cavity temperature: First, move the second fixture 30 equipped with the reference thermometer to the recorded scale value, measure the reference value of the oven cavity temperature, and move it aside after repeated measurements; then, move the first slider 60 to the first positioning hole 511, install the first fixture 20 equipped with the thermometer to be tested, and position it; then, control the movement of the second guide rail 52 through the host computer 72, move the thermometer to be tested to the calibration distance of the thermometer, press the measurement key to obtain the measured value, and repeat several times to calculate the average value; similarly, replace the first fixture 20 equipped with other thermometers to be tested, control the calibration distance through the motor, and complete the measurement of all the thermometers to be tested.

[0059] h. Verification and calibration of other temperature points: change the set temperature of the radiation source 90 and repeat step f.

[0060] Embodiment 2:

[0061] like Figure 3 As shown, the adjustment member 43 of the first clamp 20 adopts a movable part 433 which is an axis provided with a first thread segment and a second thread segment, and the threads of the first thread segment and the second thread segment are arranged in opposite directions. The middle part of the first slide rod 23 is provided with a threaded hole corresponding to the first thread segment, and the middle part of the second thread segment is provided with a threaded hole corresponding to the second thread segment. One end of the movable part 433 is fixedly connected to the screwing part 432, and the other end is provided with a limit block 45.

[0062] The operation method is the same as that of the first embodiment.

[0063] The radiation thermometer verification and calibration device provided by the present invention utilizes a clamp to fix the thermometer to be tested, has higher aiming accuracy, and improves the accuracy of measurement; utilizes an elastic clamp to clamp the thermometer to be tested, can adapt to thermometers of various shapes, improves the application range of the thermometer verification and calibration device, and has significant versatility; utilizes a person's wrist to adjust the posture of the thermometer to be tested, can flexibly, conveniently and quickly meet the measurement requirements regarding aiming, and makes the detection operation simpler and more convenient.

[0064] The operating method of the radiation thermometer verification and calibration device provided by the present invention combines the tested thermometers of different shapes and sizes with a unified fixture one by one, and utilizes the standardized structure of the fixture and the same installation method to solve the problem of different shapes and sizes of the tested thermometers and improve the working efficiency of the verification and calibration. Moreover, during the entire verification and calibration process, the tested thermometer maintains a constant measurement posture, and through the precise positioning of the fixture, the consistency of the measurement area is ensured, thereby improving the accuracy of the verification and calibration. In addition, the verification and calibration operation method adopts a motor to control the verification distance and utilizes a standardized fixture to perform a normalized installation of the tested thermometers of different shapes and sizes, thereby improving the automation and mechanization of the verification and calibration operation.

[0065] The purpose of the above embodiments is to reproduce and deduce the technical solution of the present invention in an exemplary manner, and to fully describe the technical solution, purpose and effect of the present invention. The purpose is to make the public understand the disclosure of the present invention more thoroughly and comprehensively, and the protection scope of the present invention is not limited thereto; the above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementation methods not listed here. Any replacement and improvement made on the basis of not violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. Radiation thermometer verification and calibration device, characterized in that: The invention comprises a bracket body, a first clamp and a second clamp, the first clamp comprising a base, a support part, a first sliding rod, a second sliding rod, a first clamping strip, a second clamping strip and an adjusting mechanism, the support part and the adjusting mechanism are both arranged on the base, one end of the first clamping strip is connected to the first sliding rod, and the other end is connected to the support part, one end of the second clamping strip is connected to the second sliding rod, and the other end is connected to the support part, a clamping space is formed between the first clamping strip, the second clamping strip and the support part, the first sliding rod and the second sliding rod are both connected to the adjusting mechanism, the second clamp comprises a fixed block provided with a fixed groove, a clamping mechanism and a lifting mechanism, the clamping mechanism and the lifting mechanism are both connected to the fixed block, a moving mechanism is arranged on the bracket body, and the first clamp and the second clamp are both connected to the moving mechanism; The adjustment mechanism comprises a first fixed column, a second fixed column and an adjustment member, the first fixed column and the second fixed column are both arranged on the base, a guide rod is connected between the first fixed column and the second fixed column, the first slide rod and the second slide rod are movably connected to the guide rod, and the adjustment member is arranged on the second fixed column and connected to the first slide rod and the second slide rod; The clamping mechanism includes a positioning member and a pressing plate arranged in a fixing groove, a threaded hole is arranged on the side wall of the fixing block, a corresponding thread is arranged on the positioning member, the positioning member passes through the threaded hole and is movably connected to the pressing plate, one end of the lifting mechanism is connected to the fixing block, and the other end is connected to the moving mechanism; The moving mechanism includes a first guide rail and a second guide rail, both of which are arranged on the bracket body, the first guide rail is arranged along the horizontal transverse direction of the bracket body, and the second guide rail is arranged along the horizontal longitudinal direction of the bracket body, and a connecting block is provided on the second guide rail, and the first guide rail is movably connected to the second guide rail through the connecting block, and the first clamp and the second clamp are both movably connected to the first guide rail.

2. The radiation thermometer verification and calibration device according to claim 1, characterized in that: The first clamping strip and the second clamping strip are integrally arranged to form a long clamping strip, the long clamping strip is made of elastic material, the middle portion of the long clamping strip is movably connected to the support portion, one end of the long clamping strip is connected to the first sliding rod, and the other end is connected to the second sliding rod.

3. The radiation thermometer verification and calibration device according to claim 1, characterized in that: The adjusting member includes a fixed part, a screwing part and a movable part, the fixed part is arranged on the second fixed column, one end of the movable part is provided with a thread, the screwing part is provided with a threaded hole corresponding to the thread of the movable part, the other end of the movable part is fixedly connected to the first sliding rod, and the second sliding rod is sleeved on the outer wall of the movable part and close to the screwing part of the adjusting member.

4. The radiation thermometer verification and calibration device according to claim 1, characterized in that: The adjusting member includes a fixed part, a screwing part and a movable part, the fixed part is arranged on the second fixed column, the movable part is provided with a first thread segment and a second thread segment, the threads of the first thread segment and the second thread segment are arranged in opposite directions, the first sliding rod is provided with a threaded hole corresponding to the first thread segment, the second thread segment is provided with a threaded hole corresponding to the second thread segment, one end of the movable part is fixedly connected to the screwing part, and the other end is provided with a limit block.

5. The radiation thermometer verification and calibration device according to claim 1, characterized in that: There are two guide rods, and the two guide rods are arranged flush along the longitudinal direction of the fixed column, and a gap is provided between the two guide rods. One end of the first sliding rod is movably connected to one of the guide rods, and the other end is movably connected to the other guide rod. One end of the second sliding rod is movably connected to one of the guide rods, and the other end is movably connected to the other guide rod.

6. The radiation thermometer verification and calibration device according to claim 1, characterized in that: The first guide rail is provided with a first slider and a second slider, the first clamp is movably connected to the first guide rail via the first slider, the second clamp is movably connected to the first guide rail via the second slider, and both the first slider and the second slider are provided with positioning pieces.

7. An operating method for a radiation thermometer verification and calibration device, wherein the radiation thermometer verification and calibration device according to any one of claims 1 to 6 is applied to the operating method, characterized in that: The following steps are involved: a. Install the first fixture: install the first fixture on the moving mechanism; b. Install the thermometer to be tested: place the thermometer to be tested in the clamping space of the first clamp, and control the adjustment mechanism to control the first slide bar and the second slide bar to move, thereby driving the first clamp bar and the second clamp bar to move, clamp the thermometer to be tested to a state where the posture can be adjusted, align the thermometer to be tested with the test point, and then control the adjustment mechanism to fix and maintain the posture of the thermometer to be tested; c. Install the reference thermometer: place the reference thermometer in the fixing groove of the second fixture, fix the reference thermometer by adjusting the clamping mechanism, and adjust the position of the reference thermometer by the lifting mechanism; d. Verification and calibration of temperature points: The second fixture equipped with the reference thermometer is first moved to the test position to measure the temperature reference value, and then the second fixture is moved away from the test position. Then the first fixture equipped with the thermometer to be tested is moved to the test position to measure the temperature value, and the measurement is repeated multiple times to obtain the temperature average value.

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