Calibration device and calibration method of infrared temperature measurement system

Abstract

The invention relates to the technical field of infrared temperature measurement, in particular to an infrared temperature measurement system calibration device and method. An infrared temperature measurement system calibration device comprises a detector platform, a detector moving assembly, a reflector assembly and a black body platform assembly. The infrared detector is connected to the detector moving assembly; the detector moving assembly is connected to the upper surface of the front end of the detector platform; the upper surface of the rear end of the detector platform is provided with a rectangular groove, and the reflector assembly is hinged in the rectangular groove and can swing up and down. And the black body platform assembly is hinged and accommodated at two sides of the bottom of the rear end of the detector platform. The detector calibration device is compact in structure, easy to carry and erect and suitable for calibration requirements of infrared temperature measurement systems in various occasions, the detector is calibrated through the high-temperature end and the low-temperature end of the blackbody radiation source, calibration accuracy and reliability are improved, and the problems that an existing calibration process is complex in operation and low in efficiency are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of infrared temperature measurement, and in particular to a calibration device and a calibration method for an infrared temperature measurement system. Background Art

[0002] In infrared temperature measurement technology, the measurement accuracy of the infrared temperature measurement system directly affects the credibility of the data collected by the system, and accurate calibration is crucial to obtain reliable temperature measurement results. However, the existing infrared temperature measurement system may have inaccurate measurements due to various factors during use. Therefore, an effective calibration device and method are needed to ensure the accuracy of the infrared temperature measurement system. The current calibration method has problems such as complex operation and low efficiency, which makes it difficult to meet the needs of practical applications and brings inconvenience to practical applications. Summary of the invention

[0003] In order to solve the problem that the existing calibration method is complex in operation and inefficient, the present invention provides an infrared temperature measurement system calibration device and method.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an infrared temperature measurement system calibration device, used for calibrating the temperature of an infrared detector, characterized in that it includes a detector platform, a detector moving assembly, a reflector assembly and a blackbody platform assembly; the detector moving assembly is connected to the upper surface of the front end of the detector platform; the infrared detector is connected to the detector moving assembly; a rectangular groove is provided on the upper surface of the rear end of the detector platform, the reflector assembly is hinged in the rectangular groove and can swing up and down around the hinge in the groove; the blackbody platform assembly is hinged and accommodated at the bottom of the rear end of the detector platform.

[0005] The detector platform is a table-shaped structure with a rectangular table top built from a square tube frame, with a vertical square tube fixed to each of the four corners of the lower surface of the rectangular table top, and a square card slot fixed to each of the inner sides of the lower parts of the two vertical square tubes on the side of the detector platform close to the blackbody platform assembly, the bottom of the blackbody platform assembly is inserted into the square card slot, and the blackbody platform assembly is stored under the detector platform; two positioning pins are provided on the upper surface of the detector platform table top, and the detector moving assembly is positioned by the positioning pins and is movably connected to the detector platform; a snap-fit ​​assembly is provided on the lower surface of the rectangular table top of the detector platform, and one end of the reflector assembly is hinged to the snap-fit ​​assembly and can swing up and down in the rectangular slot.

[0006] The locking assembly is a chamfered right-angled U-shaped groove structure, whose upper surface is connected to the lower surface of the detector platform, and a spring pin shaft structure is connected in the groove, and the spring pin shaft structure includes a spring pin, a spring, a stop screw and a spring pin guide sleeve; the spring pin guide sleeve is connected between the two side walls of the U-shaped groove, and the spring pin horizontally passes through the entire U-shaped groove and is slidably connected in the spring pin guide sleeve; a strip groove is axially opened on the side of the spring pin guide sleeve, and the stop screw is fixed on the side of the spring pin and passes through the strip groove to limit the freedom of the spring pin to rotate around its own axis; the spring pin is an integrated structure composed of two cylinders of different diameters, one end of the large diameter cylinder passes through the side wall of one end of the U-shaped groove and engages with the reflector assembly; one end of the small diameter cylinder passes through the side wall of the other end of the U-shaped groove; the spring is sleeved on one end of the small diameter cylinder of the spring pin, one end of the spring abuts against the side wall of the U-shaped groove, and the other end abuts against the large cylindrical end of the spring pin.

[0007] The detector moving assembly includes a guide rail slider assembly and a lifting platform, wherein the lifting platform is connected to the guide rail slider assembly and can slide along the guide rail slider assembly; The guide rail and slider assembly comprises a guide rail, a slider and a first limit block. A groove is provided at the bottom of the slider to cooperate with the guide rail for linear sliding, and the first limit block limits the extreme positions at both ends. The guide rail is fixedly connected to the detector platform, and a first limit block is fixed at each end of the top surface of the guide rail to limit the movement range of the slider and realize the rapid positioning of the infrared detector. A boss is provided at the front end of the slider. The lifting platform is a scissors-type lifting structure, including a rotating knob, a lifting platform support rod group, a lifting platform moving platform, and a lifting platform static platform; the lifting platform moving platform is arranged above the lifting platform static platform, the lifting platform static platform is connected to the slider, and the edge of the lifting platform static platform is close to the boss arranged at the front end of the slider to ensure its orientation; the lifting platform support rod group is arranged between the lifting platform moving platform and the lifting platform static platform, and the rotating knob is connected to one end of the lifting platform support rod group. By rotating the knob, the scissors angle of the support rod group can be adjusted, thereby changing the relative height of the moving platform relative to the lifting platform static platform.

[0008] The reflector assembly comprises a lens barrel, a lens, a reflective lens, a reflector connecting rod assembly, a support block and a second stop block, wherein the reflector connecting rod assembly comprises an upper connecting rod, a lower connecting rod and a lens connecting rod; Two lens connecting rods are hinged at both ends of the lens barrel, and a lens is fixed on each of the two lens connecting rods, and the cavity of the lens is coaxial with the lens barrel; a reflective lens is fixed inside each lens, and the two reflective lenses are parallel and form an angle of 45° with the axis of the lens barrel; the free end of the lens connecting rod is hinged to one end of the lower connecting rod, and the other end of the lower connecting rod is hinged to the detector platform, and a pin hole is provided at the end; The upper connecting rod is a rod structure with hinge points at both ends and the middle. The three hinge points are not in a straight line, and the distances between the hinge points at both ends and the middle hinge point are different. It includes a long rod end and a short rod end. The middle hinge points of the two upper connecting rods are hinged to the outer circular surface in the middle of the lens barrel and can rotate freely around the lens barrel; the hinge points of the long rod ends of the two upper connecting rods are respectively hinged to the hinge supports above the detector platform; the hinge points of the short rod ends of the two upper connecting rods are hinged to a support block together, and the support block can rotate freely around the hinge points, and a second limit block is fixed on the top of the support block; the detector platform, the upper connecting rod, the lens connecting rod, and the lower connecting rod cooperate to form a parallelogram connecting rod mechanism to realize the up and down swing of the lens.

[0009] The blackbody platform assembly is a rectangular table structure constructed with a square tube frame, including a blackbody platform and a folding rod assembly. There are two groups of folding rod assemblies, one end of each group of folding rod assemblies is hinged to two vertical square tubes at the rear end of the detector platform, and the other end is hinged to the lower surface of the front end of the blackbody platform. The folding rod assembly can be folded or unfolded by rotating around the end hinge point, so that the blackbody platform can be in two states: storage and use.

[0010] The reflective lens is made of H-K9L optical glass, one side of which is coated with an external reflective film, and the other side is not treated.

[0011] The detector platform is a rectangular table structure built with a square tube frame, with a vertical square tube fixed to each of the four corners of the lower surface of the rectangular table, and a square slot fixed to each of the lower inner sides of the two vertical square tubes on the side of the detector platform close to the blackbody platform assembly. The bottom of the blackbody platform assembly is inserted into the square slot to store the blackbody platform assembly under the detector platform; two positioning pins are provided on the upper surface of the detector platform table, and the detector moving assembly is positioned by the positioning pins and is movably connected to the detector platform; a snap-fit ​​assembly is provided on the lower surface of the detector platform table, one end of the reflector assembly is hinged to the snap-fit ​​assembly and can swing up and down in the rectangular slot; the snap-fit ​​assembly is a right-angled U-shaped slot structure, the upper surface of which is connected to the lower surface of the detector platform, and a spring pin shaft structure is connected in the slot, and the spring pin shaft structure includes a spring pin, a spring, and a stop screw nail and spring pin guide sleeve; the spring pin guide sleeve is connected between the two side walls of the U-shaped groove, and the spring pin horizontally passes through the entire U-shaped groove and is slidably connected in the spring pin guide sleeve; a strip groove is opened axially on the side of the spring pin guide sleeve, and a stop screw is fixed on the side of the spring pin and passes through the strip groove to limit the freedom of the spring pin to rotate around its own axis; the spring pin is an integrated structure composed of two cylinders of different diameters, one end of the large diameter cylinder passes through the side wall of one end of the U-shaped groove and engages with the reflector assembly; one end of the small diameter cylinder passes through the side wall of the other end of the U-shaped groove; the spring is sleeved on one end of the small diameter cylinder of the spring pin, one end of the spring abuts against the side wall of the U-shaped groove, and the other end abuts against the large cylindrical end of the spring pin; the detector moving assembly includes a guide rail slider assembly and a lifting platform, the lifting platform is connected to the guide rail slider assembly, and can slide along the guide rail slider assembly; The guide rail and slider assembly comprises a guide rail, a slider and a first limit block. A groove is provided at the bottom of the slider to cooperate with the guide rail for linear sliding, and the first limit block limits the extreme positions at both ends. The guide rail is fixedly connected to the detector platform, and a first limit block is fixed at each end of the top surface of the guide rail to limit the movement range of the slider and realize the rapid positioning of the infrared detector. A boss is provided at the front end of the slider. The lifting platform is a scissor-type lifting structure, including a rotating knob, a lifting platform support rod group, a lifting platform moving platform, and a lifting platform static platform; the lifting platform moving platform is arranged above the lifting platform static platform, the lifting platform static platform is connected to the slider, and the edge of the lifting platform static platform is close to the boss arranged at the front end of the slider to ensure its orientation; the lifting platform support rod group is arranged between the lifting platform moving platform and the lifting platform static platform, and the rotating knob is connected to one end of the lifting platform support rod group. By rotating the knob, the scissor angle of the support rod group can be adjusted, thereby changing the relative height of the moving platform relative to the lifting platform static platform; The reflector assembly comprises a lens barrel, a lens, a reflective lens, a reflector connecting rod assembly, a support block and a second limit block, wherein the reflector connecting rod assembly comprises an upper connecting rod, a lower connecting rod and a lens connecting rod; two lens connecting rods are hinged at both ends of the lens barrel, a lens is fixed on each of the two lens connecting rods, and the cavity of the lens is coaxial with the lens barrel; a reflective lens is fixed inside each of the lenses, the two reflective lenses are parallel and form an angle of 45° with the axis of the lens barrel; the free end of the lens connecting rod is hinged to one end of the lower connecting rod, and the other end of the lower connecting rod is hinged to the detector platform, and a pin hole is provided at the end; the upper connecting rod is a rod structure with hinge points at both ends and the middle, the three hinge points are not in a straight line, and the distances between the hinge points at both ends and the middle hinge point are different, including a long rod end and a short rod end, the middle hinge points of the two upper connecting rods are hinged to the outer circular surface in the middle of the lens barrel, and can rotate freely around the lens barrel; the long rod ends of the two upper connecting rods The hinge points are respectively hinged to the hinge supports above the detector platform; the hinge points of the short rod ends of the two upper connecting rods are jointly hinged to a support block, the support block can rotate freely around the hinge points, and a second limit block is fixed on the top of the support block; the detector platform, the upper connecting rod, the lens connecting rod, and the lower connecting rod cooperate to form a parallelogram connecting rod mechanism to realize the up and down swing of the lens; the blackbody platform assembly is a rectangular table structure built with a square tube frame, including a blackbody platform and a folding rod assembly, and the folding rod assembly has two groups, one end of each group of folding rod assemblies is respectively hinged to the two vertical square tubes at the rear end of the detector platform, and the other end is respectively hinged to the lower surface of the front end of the blackbody platform, and the folding rod assembly can be rotated around the end hinge point to fold or unfold the folding rod assembly, so that the blackbody platform can be stored and used in two states; the reflective lens uses H-K9L optical glass, one side is coated with an external reflective film, and the other side is not treated.

[0012] A calibration method for an infrared temperature measurement system calibration device comprises the following steps: Step 1: unfold the folding rod assembly, place the detector platform and the blackbody platform stably, and place the blackbody emission source on the blackbody platform; Step 2: Turn on the blackbody radiation source and start preheating; Step 3: Install the infrared detector to be calibrated on the detector moving assembly, turn on the external display, adjust the lifting platform so that the image of the infrared detector to be calibrated is at the center of the black body radiation source, and fix it with fastening screws; Step 4: Calibrate the low temperature section of the detector: Place the infrared detector to be calibrated at the rear end of the guide rail slider assembly, set the display temperature value of the black body at the low temperature end to the working point of 0°C, record the reading after the black body temperature stabilizes, set the temperature points to 20°C, 30°C, 40°C, 50°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 150°C in sequence, and record the detector readings; Step 5: Calibrate the high temperature section of the detector: Move the infrared detector to be calibrated to the front end of the track slider assembly, turn on the reflector assembly at the same time, set the display temperature value of the black body at the high temperature end to the working point of 160°C, record the reading after the black body temperature stabilizes, set the temperature points to 180°C, 200°C, 260°C, 300°C, and 400°C in sequence, and record the detector readings; Step 6: The calibration of the low temperature section and the high temperature section can be performed alternately as needed. Repeat steps 4 to 5 to save time waiting for the black body temperature to stabilize. Step 7: Fit the detector readings at each temperature value to obtain a calibration curve; fit the relationship curve between the radiation data and the temperature based on the radiation data and the blackbody temperature value, that is, the relationship curve between the detector and the standard temperature value.

[0013] Beneficial effects: 1. The blackbody platform and infrared temperature measurement system of the integrated calibration device of the present invention can realize the rapid construction and folding storage of the platform, greatly simplifying the preparation process; 2. The present invention can accurately ensure the relative position relationship between the calibrated infrared detector and the black body by folding and unfolding the black body platform to the positioning position, thereby achieving effective control of the calibration error; 3. The present invention realizes the rapid switching of the high temperature and low temperature black body temperature ranges by lifting the reflector assembly without moving the black body and the calibrated infrared detector, thereby reducing the alignment operation between the detector and the black body and further reducing the calibration error; 4. The present invention utilizes the reflector assembly to quickly switch the black body temperature segment, effectively allocates the waiting time for adjusting the temperature using the black body, and alternately performs the calibration process of the high temperature segment and the low temperature segment, thereby effectively improving the calibration efficiency.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the calibration device of the present invention in a folded state; Figure 2 It is a schematic diagram of the structure of the calibration device of the present invention in the unfolded use state; Figure 3 is a schematic structural diagram of a reflector assembly of the present invention; Figure 4 It is a structural schematic diagram of the detector moving assembly of the present invention; Figure 5 It is a structural schematic diagram of the spring pin assembly of the present invention.

[0017] In the figure: 1. detector platform; 2. detector moving assembly; 21. guide rail and slider assembly; 211. guide rail; 212. slider; 213. first limit block; 22. lifting platform; 221. knob; 222. lifting platform support rod group; 223. lifting platform moving platform; 224. lifting platform static platform; 23. infrared detector; 3. reflector assembly; 31. lens barrel; 32. lens; 33. reflector lens; 34. reflector connecting rod assembly; 341. upper connecting rod; 342. lower connecting rod; 343. lens connecting rod; 35. support block; 36. second limit block; 37. spring pin shaft structure; 371. spring pin; 372. spring; 373. stop screw; 374. spring pin guide sleeve; 4. blackbody platform assembly; 41. blackbody platform; 42. folding rod assembly; 43. blackbody radiation source. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example: according to Figure 1-Figure 5 The infrared temperature measurement system calibration device shown is used for temperature calibration of the infrared detector 23, including a detector platform 1, a detector moving assembly 2, a reflector assembly 3 and a blackbody platform assembly 4; the detector moving assembly 2 is connected to the upper surface of the front end of the detector platform 1; the infrared detector 23 is connected to the detector moving assembly 2; a rectangular groove is provided on the upper surface of the rear end of the detector platform 1, and the reflector assembly 3 is hinged in the rectangular groove and hingedly swings in the groove; the blackbody platform assembly 4 is hingedly received on both sides of the bottom of the rear end of the detector platform 1, and the blackbody platform assembly 3 is flush with the upper surface of the detector platform 1 after unfolding. A square card slot is fixed on the inner side of each of the two vertical square tubes close to one side of the blackbody platform assembly, and screws are screwed in. After the blackbody platform assembly 4 is folded, it is positioned by the friction of the screws.

[0020] Further, such as Figure 2As shown, the detector platform 1 is a table-shaped structure with a rectangular table top built from a square tube frame, and a vertical square tube is fixed to each of the four corners of the lower surface of the rectangular table top. A square slot is fixed to each of the lower inner sides of the two vertical square tubes on the side of the detector platform 1 close to the blackbody platform component 4. The bottom of the blackbody platform component 4 is inserted into the square slot, and the blackbody platform component 4 is stored under the detector platform; two positioning pins are provided on the upper surface of the table top of the detector platform 1, and the detector moving component 2 is positioned by the positioning pins and is movably connected to the detector platform 1; a snap-fit ​​component is provided on the lower surface of the rectangular table top of the detector platform 1, and one end of the reflector component 3 is hinged to the snap-fit ​​component and can swing up and down in the rectangular slot.

[0021] Further, such as Figure 5 As shown, the snap-fit ​​assembly is a chamfered right-angle U-shaped groove structure, the upper surface of which is connected to the lower surface of the detector platform 1, and a spring pin shaft structure 37 is connected in the groove, and the spring pin shaft structure 37 includes a spring pin 371, a spring 372, a stop screw 373 and a spring pin guide sleeve 374; the spring pin guide sleeve 374 is connected between the two side walls of the U-shaped groove, and the spring pin 371 horizontally passes through the entire U-shaped groove and is slidably connected in the spring pin guide sleeve 374; the side of the spring pin guide sleeve 374 is provided with a strip groove along the axial direction, and the stop screw 373 It is fixed on the side of the spring pin 371 and passes through the strip groove to limit the freedom of the spring pin 371 to rotate around its own axis; the spring pin 371 is an integrated structure composed of two cylinders of different diameters, one end of the large diameter cylinder passes through the side wall of one end of the U-shaped groove and engages with the reflector assembly 3; one end of the small diameter cylinder passes through the side wall of the other end of the U-shaped groove; the spring 372 is fitted on one end of the small diameter cylinder of the spring pin 371, one end of the spring 372 abuts against the side wall of the U-shaped groove, and the other end abuts against the large cylindrical end of the spring pin 371.

[0022] Further, such as Figure 4 As shown, the detector moving assembly 2 includes a guide rail slider assembly 21 and a lifting platform 22, and the lifting platform 22 is connected to the guide rail slider assembly 21 and can slide along the guide rail slider assembly 21; The guide rail and slider assembly 21 includes a guide rail 211, a slider 212 and a first limit block 213. The bottom of the slider 212 is provided with a groove to cooperate with the guide rail 211 for linear sliding, and the first limit block 213 limits the extreme positions of both ends; the guide rail 211 is fixedly connected to the detector platform 1, and a first limit block 213 is fixed at both ends of the top surface of the guide rail 211 to limit the movement range of the slider 212 and realize the rapid positioning of the infrared detector 23; a boss is provided at the front end of the slider 212; The lifting platform 22 is a scissor-type lifting structure, including a rotating knob 221, a lifting platform support rod group 222, a lifting platform moving platform 223, and a lifting platform static platform 224; the lifting platform moving platform 223 is arranged above the lifting platform static platform 224, the lifting platform static platform 224 is connected to the slider 212, and the edge of the lifting platform static platform 224 is close to the boss arranged at the front end of the slider 212 to ensure its orientation; the lifting platform support rod group 222 is arranged between the lifting platform moving platform 223 and the lifting platform static platform 224, and the rotating knob 221 is connected to one end of the lifting platform support rod group 222. By rotating the knob 221, the scissor angle of the support rod group 222 can be adjusted, thereby changing the relative height of the moving platform 223 relative to the lifting platform static platform 224.

[0023] Further, such as Figure 3 As shown, the reflector assembly 3 includes a lens barrel 31, a lens 32, a reflective lens 33, a reflector link assembly 34, a support block 35 and a second stop block 36, wherein the reflector link assembly 34 includes an upper link 341, a lower link 342, and a lens link 343; Two lens connecting rods 343 are hinged at both ends of the lens barrel 31, and a lens 32 is fixed on each of the two lens connecting rods, and the cavity of the lens 32 is coaxial with the lens barrel 31; the reflective lens 33 includes two lenses, which are respectively bonded to the two lenses at both ends of the lens barrel. Under the geometric constraints of the reflective mirror connecting rod assembly 34, the mirror planes of the two reflective lenses 33 always remain vertical, and the two lenses 33 are always parallel and form a 45° angle with the lens barrel 31; in this way, the radiation light incident on one lens can be reflected twice by the two reflective lenses and then emitted from the other lens in the same direction and parallel. The free end of the lens connecting rod 343 is hinged to one end of the lower connecting rod 342, and the other end of the lower connecting rod 342 is hinged to the detector platform 1; Furthermore, the upper connecting rod 341 is a rod structure with hinge points at both ends and the middle, the three hinge points are not in a straight line, the distances between the hinge points at both ends and the middle hinge point are different, the middle hinge points of the two upper connecting rods 341 are hinged to the stepped outer circular surface in the middle of the lens barrel 31, and can rotate freely around the lens barrel 31; the hinge points of the long rod ends of the two upper connecting rods 341 are respectively hinged to the hinge supports above the detector platform 1; the hinge points of the short rod ends of the upper connecting rods 341 are jointly hinged to a support block 35, the support block 35 can rotate freely around the hinge points, and a second limit block 36 is fixed on the top of the support block 35; the two ends of the upper connecting rod 341 are respectively It is hinged with the detector platform 1 and the lens barrel 31; the detector platform 1, the upper connecting rod 341, the lens connecting rod 343, and the lower connecting rod 342 cooperate to form a parallelogram plane four-bar linkage mechanism to realize the circular motion of the lens 32; the lens connecting rod 343 is a connecting rod structure with different diameters at both ends, and the large diameter ends of the two lens connecting rods 343 are respectively hinged with the two ends of the lens barrel 31, and the two lens connecting rods 343 can rotate freely around the lens barrel 31; a lens 32 is fixed on the outer side of each of the two lens connecting rods 343, and there is no relative movement between the two, and the lens 32 is positioned in the circumferential direction by a positioning pin so that its direction is always kept horizontal. A reflective lens 33 is fixed in each of the two lenses; one end of the two lower connecting rods 342 is respectively hinged with the small diameter end of the lens connecting rod 343, and the other end is respectively hinged with the hinge support below the platform surface of the detector platform 1, and the lower connecting rod 342 can rotate freely relative to the hinge parts of the hinge points at both ends. The positions of the two sets of hinge points on the detector platform 1 are always fixed, and the connecting line thereof is always kept vertical, so the connecting line of the two hinge points of the lens connecting rod 343 is also always vertical, that is, the direction of the lens connecting rod 343 is always unchanged. Since the lens 32 is fixedly connected to the lens connecting rod 343, the lens 32 also always keeps the same direction, that is, it is always kept horizontal. The parallelogram mechanism drives the lens barrel 31 to make a circular motion around the hinge point of the long rod end of the upper connecting rod 341, so that the lens barrel 31 is stored below the surface of the detector platform 1, or extends above the surface of the detector 1.

[0024] When the high temperature end of the black body platform assembly 4 is used for calibration, the reflector assembly 3 is not used. The reflector assembly 3 is stored below the platform surface of the detector platform 1, and the lower connecting rod 342 swings accordingly. When the lower connecting rod 342 contacts the spring pin 371, the inclined surface of the pin head of the spring pin 371 is squeezed, and the spring pin 371 is squeezed into the support. The lower connecting rod 342 continues to swing, and when the pin holes of the spring pin 371 and the lower connecting rod 342 are aligned, the compressed spring 372 recovers, driving the spring pin 371 to be inserted into the pin hole of the lower connecting rod 342. At this time, the lower connecting rod is constrained from two different directions by the spring pin 371 and the detector platform 1, and the position is locked. The spring pin head fixes a stop screw 373, and the stop screw 373 can only slide in the support groove, limiting the freedom of the spring pin 371 to rotate around its own axis, and preventing the spring pin 371 from rotating and losing the limiting function. When using the low temperature end of the black body for calibration, it is necessary to extend the reflector assembly 3, pull the spring pin 371 to disengage it from the pin hole of the lower connecting rod 342, and then lift the reflector assembly 3 to extend it above the surface of the detector platform 1. The support block 35 extends out of the slot of the detector platform 1 together with the reflector assembly 3 in the storage state. The reflector assembly 3 moves as a whole above the surface of the detector platform 1, and the support block 35 is rotated until the second limit block 36 abuts against the upper connecting rod 341 and cannot continue to rotate. The support block 35 is placed on the upper surface of the detector platform 1; the reflector assembly 3 tends to move downward due to gravity, but its movement is limited by the support block 35 and the second limit block 36 to complete the positioning.

[0025] Furthermore, the blackbody platform assembly 4 includes a blackbody platform 41 and a folding rod assembly 42. One end of the two folding rod assemblies 42 is hinged to the square tubes on both sides of the rear end of the detector platform 1, and the other end is hinged to the blackbody platform 41. The folding rod assembly 42 can be folded or unfolded by rotating around the end hinge point, so that the blackbody platform 41 can be in two states: storage and use.

[0026] The blackbody platform 41 is a rectangular table structure constructed with a square tube frame, and a square tube perpendicular to the platform surface is fixed on the inner side of each end of the two long sides of the rectangular platform. The folding rod assembly 42 is composed of two groups of connecting rods, and the structures and connection relationships of the two groups of connecting rods are the same: each group contains two connecting rods, and their ends are hinged together and can rotate freely; one end of the two free ends is hinged to the hinge support of the blackbody platform 41, and the other end is hinged to the hinge support of the detector platform 1, and both can rotate freely. The two groups of connecting rods are respectively located on both sides of the detector platform 1 and the blackbody platform 41, and the two move synchronously. When the blackbody platform 41 is in the storage state, the folding rod assembly 42 is folded, and the two connecting rods of each group of connecting rods are folded into the detector platform 1 and the platform surface of the blackbody platform 41 rotates; When the blackbody platform 41 is in the storage state, the folding rod assembly 42 is folded, and the two connecting rods of each connecting rod assembly are folded into the detector platform 1, and the platform surface of the blackbody platform 41 is rotated to a vertical state, and the two vertical square tubes under the platform surface of the blackbody platform 41 are inserted into the square card grooves on the inner side of the vertical square tubes of the detector platform 1, and the screws are tightened to lock the position of the blackbody platform; when the blackbody platform 41 is in the unfolded state, the folding rod assembly 42 is unfolded, and the two connecting rods of each connecting rod assembly are unfolded in a direction away from the detector platform 1, and the connecting rod hinged to one end of the blackbody platform 41 is abutted against the second limit block on the connecting rod at one end of the detector platform 1. At this time, the angle between the two connecting rods is 180°, and the four vertical square tubes under the platform surface stand on the horizontal ground, so that the platform surface of the blackbody platform 41 is rotated to a horizontal state, and the blackbody emission source 43 is placed on the blackbody platform 41, and the center of the low-temperature end of the blackbody emission source 43 faces the detector.

[0027] The reflective lens is made of H-K9L optical glass, one side of which is coated with an external reflective film, and the other side is not treated.

[0028] Furthermore, the detector platform 1 is a table-shaped structure with a rectangular table top constructed from a square tube frame, and a vertical square tube is fixed to each of the four corners of the lower surface of the rectangular table top, and a square slot is fixed to each of the lower inner sides of the two vertical square tubes on the side of the detector platform 1 close to the blackbody platform component 4, and the bottom of the blackbody platform component 4 is inserted into the square slot to store the blackbody platform component 4 under the detector platform; two positioning pins are provided on the upper surface of the table top of the detector platform 1, and the detector moving component 2 is positioned by the positioning pins and is movably connected to the detector platform 1; a snap-fitting component is provided on the lower surface of the rectangular table top of the detector platform 1, and one end of the reflector component 3 is hinged to the snap-fitting component and can swing up and down in the rectangular slot; the snap-fitting component is a right-angled U-shaped slot structure, and its upper surface is connected to the lower surface of the detector platform 1, and a spring pin shaft structure 37 is connected in the slot, and the spring pin shaft structure 37 includes a spring pin 371, a spring 372, a stop screw 373 and a spring pin guide The spring pin guide sleeve 374 is connected between the two side walls of the U-shaped groove, and the spring pin 371 horizontally passes through the entire U-shaped groove and is slidably connected in the spring pin guide sleeve 374; the side of the spring pin guide sleeve 374 is provided with a strip groove along the axial direction, and the stop screw 373 is fixed to the side of the spring pin 371 and passes through the strip groove to limit the freedom of the spring pin 371 to rotate around its own axis; the spring pin 371 is an integrated structure composed of two cylinders of different diameters, and the larger diameter cylinder One end of the column passes through the side wall of one end of the U-shaped groove and engages with the reflector assembly 3; one end of the small diameter cylinder passes through the side wall of the other end of the U-shaped groove; the spring 372 is sleeved on one end of the small diameter cylinder of the spring pin 371, one end of the spring 372 abuts against the side wall of the U-shaped groove, and the other end abuts against the large cylindrical end of the spring pin 371; the detector moving assembly 2 includes a guide rail slider assembly 21 and a lifting platform 22, and the lifting platform 22 is connected to the guide rail slider assembly 21 and can slide along the guide rail slider assembly 21; The guide rail slider assembly 21 includes a guide rail 211, a slider 212 and a first limit block 213. The bottom of the slider 212 is provided with a groove to cooperate with the guide rail 211 to slide linearly, and the first limit block 213 limits the extreme positions at both ends; the guide rail 211 is fixedly connected to the detector platform 1, and a first limit block 213 is fixed at both ends of the top surface of the guide rail 211 to limit the movement range of the slider 212 and realize the rapid positioning of the infrared detector 23; a boss is arranged at the front end of the slider 212; the lifting platform 22 is a scissor-type lifting structure, including a rotating knob 221, a lifting platform support rod group 222, a lifting platform moving platform 223, and a lifting platform static platform 224; the lifting platform moving platform 223 is arranged above the lifting platform static platform 224, the lifting platform static platform 224 is connected to the slider 212, and the edge of the lifting platform static platform 224 is close to the boss arranged at the front end of the slider 212 to ensure its orientation;The lifting platform support rod group 222 is arranged between the lifting platform moving platform 223 and the lifting platform static platform 224, and the rotating knob 221 is connected to one end of the lifting platform support rod group 222. By rotating the knob 221, the scissor angle of the support rod group 222 can be adjusted, thereby changing the relative height of the moving platform 223 relative to the lifting platform static platform 224; the reflector assembly 3 includes a lens barrel 31, a lens 32, a reflector lens 33, a reflector connecting rod assembly 34, a support block 35 and a second limit block 36, wherein the reflector connecting rod assembly 34 includes an upper connecting rod 341, a lower connecting rod 342, and a lens connecting rod 343; Two lens connecting rods 343 are respectively hinged at the two ends of the lens barrel 31, and a lens 32 is fixed on each of the two lens connecting rods, and the cavity of the lens 32 is coaxial with the lens barrel 31; a reflective lens 33 is respectively fixed inside the lens 32, and the two reflective lenses 33 are parallel and form an angle of 45° with the axis of the lens barrel; the free end of the lens connecting rod 343 is hinged to one end of the lower connecting rod 342, and the other end of the lower connecting rod 342 is hinged to the detector platform 1, and a pin hole is provided at the end; the upper connecting rod 341 is a rod structure with hinge points at both ends and the middle, and the three hinge points are not in a straight line, and the hinge points at both ends are 50 meters away from the hinge point in the middle. The distances of the two upper connecting rods 341 are different, including a long rod end and a short rod end. The middle hinge point of the two upper connecting rods 341 is hinged to the outer circular surface of the middle part of the lens barrel 31, and can rotate freely around the lens barrel 31; the hinge points of the long rod ends of the two upper connecting rods 341 are respectively hinged to the hinge support above the detector platform 1; the hinge points of the short rod ends of the two upper connecting rods 341 are jointly hinged to a support block 35, and the support block 35 can rotate freely around the hinge point. A second limit block 36 is fixed on the top of the support block 35; the detector platform 1, the upper connecting rod 341, the lens connecting rod 343, and the lower connecting rod 342 cooperate to form a parallelogram connecting rod mechanism to realize the lens 32 swings up and down; the blackbody platform assembly 4 is a rectangular table structure built with a square tube frame, including a blackbody platform 41 and a folding rod assembly 42. There are two groups of folding rod assemblies 42. One end of each group of folding rod assemblies 42 is hinged to two vertical square tubes at the rear end of the detector platform 1, and the other end is hinged to the lower surface of the front end of the blackbody platform 41. The folding rod assembly 42 rotates around the end hinge point to fold or unfold the folding rod assembly 42, so that the blackbody platform 41 can be stored and used; the reflective lens uses H-K9L optical glass, one side is coated with an external reflective film, and the other side is not treated. ;

[0029] Different from the above-mentioned embodiment, a calibration method of an infrared temperature measurement system calibration device comprises the following steps: Step 1: unfold the folding rod assembly 42 and place the detector platform 1 and the black body platform 41 stably; Step 2: Turn on the black body radiation source 43 and start preheating; Step 3: Install the infrared detector 23 to be calibrated on the detector moving assembly 2, turn on the external display, adjust the lifting platform 22 so that the image of the infrared detector 23 to be calibrated is at the center of the black body radiation source 43, and fix it firmly with fastening screws; Step 4: calibrate the low temperature section of the detector; place the infrared detector 23 to be calibrated at the rear end of the guide rail slider assembly 21, set the display temperature value of the black body at the low temperature end to the working point of 0°C, record the reading after the black body temperature stabilizes, set the temperature points to 20°C, 30°C, 40°C, 50°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 150°C in sequence, and record the detector reading; Step 5: Calibrate the high temperature section of the detector: Move the infrared detector 23 to be calibrated to the front end of the track slider assembly 21, and turn on the reflector assembly 3 at the same time, set the display temperature value of the high temperature end black body to the working point 160°C, and record the reading after the black body temperature stabilizes, and set the temperature points to 180°C, 200°C, 260°C, 300°C, and 400°C in sequence, and record the detector readings; Step 6: The calibration of the low temperature section and the high temperature section can be performed alternately as needed, repeating steps 4 to 5 to save time waiting for the blackbody temperature to stabilize. Step 7: Fit the detector readings at each temperature value to obtain the calibration curve. According to the radiation data and the black body temperature value, fit the relationship curve between the radiation data and the temperature, and the relationship curve between the detector and the standard temperature value. Device installation: Install the detector moving assembly, reflector assembly and blackbody platform assembly onto the detector platform and ensure that all components are firmly connected.

[0030] Adjust the hinge position of the mirror assembly so that it can be opened and retracted flexibly.

[0031] Connect the blackbody radiation source to the blackbody platform and ensure that the radiation source is stable and reliable.

[0032] The reflector assembly is hinged on the detector platform, and the blackbody platform assembly is connected to the detector platform. The blackbody radiation source is placed on the unfolded blackbody platform, and the detector to be calibrated is fixed on the detector platform. The high temperature end and low temperature end of the blackbody radiation source are used to radiate infrared energy from different distances to calibrate the detector. When the low temperature end is used, the reflector assembly is retracted, and the radiation from the low temperature end directly irradiates the detector. When the high temperature end is used, the reflector assembly is opened, and the radiation from the high temperature end is reflected by the reflector to reach the detector. The detector reading corresponding to each standard blackbody temperature value is recorded, and a calibration curve is obtained by fitting. The relationship curve between the radiation data and the blackbody temperature value is fitted, that is, the relationship curve between the detector and the standard temperature value.

[0033] The present invention realizes rapid construction and folding and storage of the platform by integrating the blackbody platform of the calibration device and the calibration device of the infrared temperature measurement system, thereby greatly simplifying the preparation process; the present invention can accurately ensure the relative position relationship between the calibrated infrared detector and the blackbody by folding and unfolding the blackbody platform to the positioning position, thereby realizing effective control of the calibration error; the present invention realizes rapid switching of the two blackbody temperature ends, high temperature and low temperature, without moving the blackbody and the calibrated infrared detector by lifting the reflector assembly, thereby reducing the alignment operation between the detector and the blackbody, thereby reducing the calibration error; the present invention utilizes the reflector assembly to rapidly switch the blackbody temperature segment, effectively allocates the waiting time for adjusting the temperature by using the blackbody, intersperses and alternately performs the calibration process of the high temperature segment and the low temperature segment, thereby realizing effective improvement of the calibration efficiency.

[0034] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0037] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A calibration device for an infrared temperature measurement system, used for calibrating the temperature of an infrared detector (23), characterized in that: The invention comprises a detector platform (1), a detector moving assembly (2), a reflector assembly (3) and a black body platform assembly (4); the detector moving assembly (2) is connected to the upper surface of the front end of the detector platform (1); the infrared detector (23) is connected to the detector moving assembly (2); a rectangular groove is provided on the upper surface of the rear end of the detector platform (1); the reflector assembly (3) is hinged in the rectangular groove and can swing up and down around the hinge in the groove; the black body platform assembly (4) is hingedly received at the bottom of the rear end of the detector platform (1).

2. The infrared temperature measurement system calibration device according to claim 1, characterized in that: The detector platform (1) is a table-shaped structure with a rectangular tabletop constructed from a square tube frame, wherein a vertical square tube is fixed to each of the four corners of the lower surface of the rectangular tabletop, and a square slot is fixed to each of the inner sides of the lower parts of the two vertical square tubes on the side of the detector platform (1) close to the blackbody platform component (4), wherein the bottom of the blackbody platform component (4) is inserted into the square slot, and the blackbody platform component (4) is stored under the detector platform; two positioning pins are provided on the upper surface of the tabletop of the detector platform (1), and the detector moving component (2) is positioned by the positioning pins and is movably connected to the detector platform (1); a snap-fit ​​component is provided on the lower surface of the rectangular tabletop of the detector platform (1), and one end of the reflector component (3) is hinged to the snap-fit ​​component and can swing up and down in the rectangular slot.

3. The infrared temperature measurement system calibration device according to claim 2, characterized in that: The engaging assembly is a right-angled U-shaped groove structure, the upper surface of which is connected to the lower surface of the detector platform (1), and a spring pin shaft structure (37) is connected in the groove, and the spring pin shaft structure (37) includes a spring pin (371), a spring (372), a stop screw (373) and a spring pin guide sleeve (374); the spring pin guide sleeve (374) is connected between the two side walls of the U-shaped groove, and the spring pin (371) horizontally passes through the entire U-shaped groove and is slidably connected in the spring pin guide sleeve (374); a strip groove is opened in the axial direction on the side of the spring pin guide sleeve (374), and the stop screw (373) is connected to the spring pin guide sleeve (374). 73) is fixed on the side of the spring pin (371) and passes through the strip groove to limit the freedom of the spring pin (371) to rotate around its own axis; the spring pin (371) is an integrated structure composed of two cylinders of different diameters, one end of the large diameter cylinder passes through the side wall of one end of the U-shaped groove and engages with the reflector assembly (3); one end of the small diameter cylinder passes through the side wall of the other end of the U-shaped groove; the spring (372) is fitted on one end of the small diameter cylinder of the spring pin (371), one end of the spring (372) abuts against the side wall of the U-shaped groove, and the other end abuts against the large cylindrical end of the spring pin (371).

4. The infrared temperature measurement system calibration device according to claim 1, characterized in that: The detector moving assembly (2) comprises a guide rail slider assembly (21) and a lifting platform (22); the lifting platform (22) is connected to the guide rail slider assembly (21) and can slide along the guide rail slider assembly (21); The guide rail and slider assembly (21) comprises a guide rail (211), a slider (212) and a first limit block (213); a groove is provided at the bottom of the slider (212) to cooperate with the guide rail (211) to slide linearly, and the first limit blocks (213) limit the extreme positions at both ends; the guide rail (211) is fixedly connected to the detector platform (1); a first limit block (213) is respectively fixed at both ends of the top surface of the guide rail (211) to limit the movement range of the slider (212) and realize the rapid positioning of the infrared detector (23); a boss is provided at the front end of the slider (212); The lifting platform (22) is a scissor-type lifting structure, comprising a rotating knob (221), a lifting platform support rod group (222), a lifting platform moving platform (223), and a lifting platform static platform (224); the lifting platform moving platform (223) is arranged above the lifting platform static platform (224), the lifting platform static platform (224) is connected to the slider (212), and the edge of the lifting platform static platform (224) is close to the boss arranged at the front end of the slider (212) to ensure its orientation; The lifting platform support rod group (222) is arranged between the lifting platform moving platform (223) and the lifting platform static platform (224); the rotating knob (221) is connected to one end of the lifting platform support rod group (222); by rotating the knob (221), the scissor angle of the support rod group (222) can be adjusted, thereby changing the relative height of the moving platform (223) relative to the lifting platform static platform (224).

5. The infrared temperature measurement system calibration device according to claim 1, characterized in that: The reflector assembly (3) comprises a lens barrel (31), a lens (32), a reflective lens (33), a reflector connecting rod assembly (34), a support block (35) and a second stop block (36), wherein the reflector connecting rod assembly (34) comprises an upper connecting rod (341), a lower connecting rod (342) and a lens connecting rod (343); Two lens connecting rods (343) are respectively hinged at both ends of the lens barrel (31), a lens (32) is respectively fixed on the two lens connecting rods, and the cavity of the lens (32) is coaxial with the lens barrel (31); a reflective lens (33) is respectively fixed inside the lens (32), and the two reflective lenses (33) are parallel and form an angle of 45° with the axis of the lens barrel; the free end of the lens connecting rod (343) is hinged to one end of the lower connecting rod (342), and the other end of the lower connecting rod (342) is hinged to the detector platform (1), and a pin hole is provided at the end; The upper connecting rod (341) is a rod structure having hinge points at both ends and a middle part, the three hinge points are not on a straight line, the distances between the hinge points at both ends and the middle hinge point are different, and the upper connecting rod (341) includes a long rod end and a short rod end, the middle hinge points of the two upper connecting rods (341) are hinged to the outer circular surface at the middle part of the lens barrel (31), and can rotate freely around the lens barrel (31); the hinge points of the long rod ends of the two upper connecting rods (341) are respectively hinged to the hinge support above the detector platform (1); the hinge points of the short rod ends of the two upper connecting rods (341) are hinged to a support block (35), and the support block (35) can rotate freely around the hinge points, and a second limit block (36) is fixed on the top of the support block (35); the detector platform (1), the upper connecting rod (341), the lens connecting rod (343), and the lower connecting rod (342) cooperate to form a parallelogram connecting rod mechanism to realize the up and down swinging of the lens (32).

6. The infrared temperature measurement system calibration device according to claim 2, characterized in that: The blackbody platform assembly (4) is a rectangular table structure constructed of a square tube frame, comprising a blackbody platform (41) and a folding rod assembly (42). There are two groups of folding rod assemblies (42), one end of each group of folding rod assemblies (42) is hinged to two vertical square tubes at the rear end of the detector platform (1), and the other end is hinged to the lower surface of the front end of the blackbody platform (41). The folding rod assembly (42) can be rotated around the end hinge point to fold or unfold the folding rod assembly (42), so that the blackbody platform (41) can be stored or used.

7. The infrared temperature measurement system calibration device according to claim 1, characterized in that: The reflective lens is made of H-K9L optical glass, one side of which is coated with an external reflective film, and the other side is not treated.

8. The infrared temperature measurement system calibration device according to claim 1, characterized in that: The detector platform (1) is a table-shaped structure with a rectangular tabletop constructed from a square tube frame, wherein a vertical square tube is fixed to each of the four corners of the lower surface of the rectangular tabletop, and a square slot is fixed to each of the inner sides of the lower parts of the two vertical square tubes on the side of the detector platform (1) close to the blackbody platform component (4). The bottom of the blackbody platform component (4) is inserted into the square slot, and the blackbody platform component (4) is stored under the detector platform; two positioning pins are arranged on the upper surface of the tabletop of the detector platform (1), and the detector moving component (2) is positioned by the positioning pins and is movably connected to the detector platform (1); a snap-fit ​​component is arranged on the lower surface of the rectangular tabletop of the detector platform (1), and one end of the reflector component (3) is hinged to the snap-fit ​​component and can be moved. The spring pin guide sleeve (374) is connected between the two side walls of the U-shaped groove, and the spring pin (371) horizontally passes through the entire U-shaped groove and is slidably connected to the spring pin guide sleeve (374); a strip groove is provided on the side of the spring pin guide sleeve (374) along the axial direction, and the stop screw (373) is fixed on the side of the spring pin (371) and passes through the strip groove to limit the spring pin (371) from rotating around its own axis. The spring pin (371) is an integrated structure composed of two cylinders of different diameters, one end of the large diameter cylinder passes through the side wall of one end of the U-shaped groove and engages with the reflector assembly (3); one end of the small diameter cylinder passes through the side wall of the other end of the U-shaped groove; the spring (372) is sleeved on one end of the small diameter cylinder of the spring pin (371), one end of the spring (372) abuts against the side wall of the U-shaped groove, and the other end abuts against the large cylinder end of the spring pin (371); the detector moving assembly (2) includes a guide rail slider assembly (21) and a lifting platform (22), the lifting platform (22) is connected to the guide rail slider assembly (21) and can slide along the guide rail slider assembly (21); the guide rail slider assembly (21) includes a guide rail (211), a slider (212) and a first limit block (213); a groove is provided at the bottom of the slider (212) to cooperate with the guide rail (211) to slide linearly, and the first limit block (213) limits the extreme positions of both ends; the guide rail (211) is fixedly connected to the detector platform (1), and a first limit block (213) is respectively fixed at both ends of the top surface of the guide rail (211) to limit the movement range of the slider (212) and realize the rapid positioning of the infrared detector (23); a boss is provided at the front end of the slider (212); the lifting platform (22) is a scissor-type lifting structure, including a rotating knob (221), a lifting platform support rod group (222), a lifting platform moving platform (223), and a lifting platform static platform (224);The lifting platform moving platform (223) is arranged above the lifting platform static platform (224), the lifting platform static platform (224) is connected to the slider (212), and the edge of the lifting platform static platform (224) is close to the boss arranged at the front end of the slider (212) to ensure its orientation; The lifting platform support rod group (222) is arranged between the lifting platform moving platform (223) and the lifting platform static platform (224); the rotating knob (221) is connected to one end of the lifting platform support rod group (222); by rotating the knob (221), the scissor angle of the support rod group (222) can be adjusted, thereby changing the relative height of the moving platform (223) relative to the lifting platform static platform (224); the reflector assembly (3) comprises a lens barrel (31), a lens (32), a reflector lens (33), a reflector connecting rod assembly (34), a support block (35) and a second stop block (36); wherein the reflector connecting rod assembly (34) comprises an upper connecting rod (341), a lower connecting rod (342), The lens connecting rod (343) is hinged at both ends of the lens barrel (31), and a lens (32) is fixed on each of the two lens connecting rods, and the cavity of the lens (32) is coaxial with the lens barrel (31); a reflective lens (33) is fixed inside each of the lenses (32), and the two reflective lenses (33) are parallel and form an angle of 45° with the axis of the lens barrel; the free end of the lens connecting rod (343) is hinged to one end of the lower connecting rod (342), and the other end of the lower connecting rod (342) is hinged to the detector platform (1), and a pin hole is provided at the end; the upper connecting rod (341) is a rod structure with hinge points at both ends and the middle, and the three hinge points are not on a straight line, and the two ends are hinged. The distances from the middle hinge point are different, including a long rod end and a short rod end. The middle hinge points of the two upper connecting rods (341) are hinged to the outer circular surface of the middle of the lens barrel (31) and can rotate freely around the lens barrel (31); the hinge points of the long rod ends of the two upper connecting rods (341) are respectively hinged to the hinge support above the detector platform (1); the hinge points of the short rod ends of the two upper connecting rods (341) are hinged to a support block (35) together, and the support block (35) can rotate freely around the hinge point. A second limit block (36) is fixed on the top of the support block (35); the detector platform (1), the upper connecting rod (341), the lens connecting rod (343), and the lower connecting rod (342) cooperate to form a parallelogram connecting rod The black body platform assembly (4) is a rectangular table structure formed by a square tube frame, comprising a black body platform (41) and a folding rod assembly (42). The folding rod assembly (42) has two groups, one end of each group of folding rod assemblies (42) is respectively hinged to two vertical square tubes at the rear end of the detector platform (1), and the other end is respectively hinged to the lower surface of the front end of the black body platform (41). The folding rod assembly (42) can be folded or unfolded by rotating around the end hinge point, so that the black body platform (41) can be stored or used. The reflective lens is made of H-K9L optical glass, one side of which is coated with an external reflective film, and the other side is not treated.

9. The calibration method of the infrared temperature measurement system calibration device according to claim 8 is characterized in that: The following steps are involved: Step 1: unfold the folding rod assembly (42), place the detector platform (1) and the black body platform (41) stably, and place the black body emission source (43) on the black body platform (41); Step 2: Turn on the black body radiation source (43) and start preheating; Step 3: Install the infrared detector (23) to be calibrated on the detector moving assembly (2), turn on the external display, adjust the lifting platform (22) so that the image of the infrared detector (23) to be calibrated is at the center of the black body radiation source (43), and fix it with fastening screws; Step 4: Calibrate the low temperature section of the detector: place the infrared detector (23) to be calibrated at the rear end of the guide rail slider assembly (21), set the display temperature value of the black body at the low temperature end to the working point of 0°C, record the reading after the black body temperature stabilizes, set the temperature points to 20°C, 30°C, 40°C, 50°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, and 150°C in sequence, and record the detector reading; Step 5: Calibrate the high temperature section of the detector: Move the infrared detector (23) to be calibrated to the front end of the track slider assembly (21), and turn on the reflector assembly (3). Set the display temperature value of the black body at the high temperature end to the working point of 160°C. After the black body temperature stabilizes, record the reading. Set the temperature points to 180°C, 200°C, 260°C, 300°C, and 400°C in sequence, and record the detector reading. Step 6: The calibration of the low temperature section and the high temperature section can be performed alternately as needed. Repeat steps 4 to 5 to save time waiting for the black body temperature to stabilize. Step 7: Fit the detector readings at each temperature value to obtain a calibration curve; fit the relationship curve between the radiation data and the temperature based on the radiation data and the blackbody temperature value, that is, the relationship curve between the detector and the standard temperature value.

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