CN110779627A

CN110779627A - Radiation thermometer verification and calibration device and operation method

Info

Publication number: CN110779627A
Application number: CN201911289492.XA
Authority: CN
Inventors: 蔡永洪; 梁满兵; 吴珍菊
Original assignee: GUANGZHOU INSTITUTE OF MEASURING AND TESTING TECHNOLOGY
Current assignee: GUANGZHOU INSTITUTE OF MEASURING AND TESTING TECHNOLOGY
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-02-11

Abstract

The invention discloses a radiation thermometer calibration and calibration device and an operation method thereof, the device comprises a bracket body, a first clamp and a second clamp, the first clamp comprises a base, a supporting part, a first slide rod, a second slide rod, a first clamping strip, a second clamping strip and an adjusting mechanism, the supporting part and the adjusting mechanism are arranged on the base, one end of the first clamping strip is connected with the first slide rod, the other end of the first clamping strip is connected with the supporting part, one end of the second clamping strip is connected with the second slide rod, the other end of the second clamping strip is connected with the supporting part, a clamping space is formed among the first clamping strip, the second clamping strip and the supporting part, the first slide rod and the second slide rod are connected with the adjusting mechanism, and the first clamp and the second clamp are connected with a moving mechanism of the bracket body. The radiation thermometer calibrating and calibrating device can clamp thermometers in various shapes, improves the application range of the radiation thermometer calibrating and calibrating device, and is favorable for improving the accuracy of measurement.

Description

Radiation thermometer verification and calibration device and operation method

Technical Field

The invention belongs to the field of temperature measurement, and particularly relates to a radiation thermometer calibration device and an operation method.

Background

The radiation thermometer is a non-contact temperature measuring instrument designed based on the corresponding relation (blackbody radiation law) between the heat radiation characteristic and the temperature of an object; during measurement, the temperature sensing element is not in direct contact with the measured object, and the temperature field of the measured object is not damaged; the measured temperature is affected by factors such as the emissivity of the object, the intermediate medium and the measurement distance.

Currently, radiation thermometers are widely applied to various industries, and the accuracy of a measurement result has an important influence on whether related work can be smoothly performed, so that the radiation thermometer is particularly important for verification work. In the calibration process of the radiation thermometer, the position and the posture of the thermometer to be tested when the thermometer is aligned with the radiation source for measurement are very important, so that the calibration result is accurate and reliable.

At present, a domestic metering technology institution has two operation modes of a handheld type and a clamping type when carrying out verification and calibration work according to a radiation thermometer verification procedure for JJJG 856-2015 work. The handheld thermometer is characterized in that an inspector holds a thermometer to be tested and stands right in front of a radiation source, the position and the posture of the thermometer to be tested are adjusted through the movement of an arm and a wrist, and a series of operations such as aiming, repeated measurement and the like are completed under the vision of human eyes and subjective judgment. The clamping type operation mode is that a thermometer to be detected is fixed by using a clamp, the position and the posture of the thermometer to be detected are gradually adjusted through the movement of a mechanical part, and a series of operations such as aiming, measurement and the like are completed under the vision and subjective judgment of human eyes; the clamping type is to use a clamp to clamp the thermometer for verification.

Although the handheld mode is flexible, the posture of the handheld thermometer is difficult to maintain, and the front and back of a measurement area cannot be ensured to be consistent, so that the measurement accuracy is poor; in addition, the radiation thermometer is required to be positioned on the axial extension line of the radiation source furnace chamber during verification and calibration, and the verification distances of different thermometers are different, so that the requirement is difficult to be strictly met in a handheld mode, and the measurement uncertainty is larger.

Adopt the centre gripping mode can improve measuring accuracy, but the handheld radiation thermometer of different specifications, the outward appearance shape is various, and the radiation thermometer of a fixture adaptation multiple shape can't be accomplished to current anchor clamps, and the inspector often need dispose many different anchor clamps simultaneously. However, since the number of types of the current jigs is small, it is not possible to completely adapt to radiation thermometers of various shapes.

Disclosure of Invention

The invention aims to provide a verification and calibration device for a radiation thermometer and an operation method thereof, wherein the verification and calibration device can be used for installing radiation thermometers with various shapes, improves the universality of the verification and calibration device for the radiation thermometer, and is favorable for improving the measurement accuracy and the repeatability precision.

The technical scheme is as follows:

the radiation thermometer calibration and calibration device comprises a bracket body, a first clamp and a second clamp, wherein the first clamp comprises a base, a supporting part, a first sliding rod, a second sliding rod, a first clamping strip, a second clamping strip and an adjusting mechanism, the supporting part and the adjusting mechanism are both arranged on the base, one end of the first clamping strip is connected with the first sliding rod, the other end is connected with the supporting part, one end of the second holding strip is connected with the second sliding rod, the other end of the second holding strip is connected with the supporting part, a holding space is formed among the first holding strip, the second holding strip and the supporting part, the first slide bar and the second slide bar are both connected with an adjusting mechanism, the second clamp comprises a fixed block provided with a fixed groove, a pressing mechanism and a lifting mechanism, the pressing mechanism and the lifting mechanism are connected with the fixed block, the support body is provided with a moving mechanism, and the first clamp and the second clamp are connected with the moving mechanism.

The thermometer to be detected is placed in a clamping space of a first clamp, the first slide rod and the second slide rod are gradually closed by controlling the adjusting mechanism, the first clamping strip and the second clamping strip are simultaneously driven to gradually close, the thermometer to be detected is clamped between the first clamping strip and the second clamping strip, the thermometer to be detected in various shapes and types can be clamped by the cooperation of the first clamping strip and the second clamping strip, the application range of the radiation thermometer calibrating and calibrating device is improved, meanwhile, the thermometer is not easy to loosen, the normal operation of measurement is influenced, and the accuracy of measurement is improved; in addition, the first clamp and the second clamp are connected with the moving mechanism, so that the first clamp and the second clamp can be quickly translated, positioned and interchanged.

In one embodiment, the first holding strip and the second holding strip are integrally arranged to form a long holding strip, the long holding strip is made of elastic materials, the middle part of the long holding strip is movably connected with the supporting part, one end of the long holding strip is connected with the first sliding rod, and the other end of the long holding strip is connected with the second sliding rod. The long clamping strip is made of elastic materials, can tightly abut against the thermometer to be detected, can deform according to the thermometer to be detected, and is more easily adapted to the thermometer to be detected; the middle part of the long holding strip is movably connected with the supporting part, so that the degree of freedom of horizontal movement of the two ends of the long holding strip is improved, and the normal work of the long holding strip is facilitated.

In one embodiment, the adjusting mechanism comprises a first fixed column, a second fixed column and an adjusting piece, the first fixed column and the second fixed column are arranged on the base, a guide rod is connected between the first fixed column and the second fixed column, the first sliding rod and the second sliding rod are movably connected to the guide rod, and the adjusting piece is arranged on the second fixed column and connected with the first sliding rod and the second sliding rod. Under the guiding action of the guide rod, the first slide rod and the second slide rod both move towards the designated direction along the guide rod, so that the long holding strip can effectively hold the thermometer.

In one embodiment, the adjusting member includes a fixed portion, a screwing portion and a movable portion, the fixed portion is disposed on the second fixed column, one end of the movable portion is provided with a screw thread, the screwing portion is provided with a screw hole corresponding to the screw thread of the movable portion, the other end of the movable portion is fixedly connected with the first sliding rod, and the second sliding rod is sleeved on an outer wall of the movable portion and is close to the screwing portion of the adjusting member. The movable part is moved by rotating the screwing part, and when the screwing part is rotated clockwise, the first slide bar and the second slide bar drive the long holding strip to approach to the middle; when the screwing part is rotated anticlockwise, the first slide bar and the second slide bar drive the long clamping strips to move towards two ends, and the thermometer to be tested can be clamped and dismounted.

In one embodiment, the adjusting member includes a fixing portion, a screwing portion and a moving portion, the fixing portion is disposed on the second fixing column, the moving portion is provided with a first thread section and a second thread section, threads of the first thread section and threads of the second thread section are arranged in an opposite direction, the first slide bar is provided with a threaded hole corresponding to the first thread section, the second thread section is provided with a threaded hole corresponding to the second thread section, one end of the moving portion is fixedly connected to the screwing portion, and the other end of the moving portion is provided with a limiting block. The movable part is driven to rotate by rotating the screwing part, and in the rotating process of the movable part, the first slide bar and the second slide bar move oppositely or reversely, so that the long clamping strips are driven to approach to the middle or move towards the two ends, and the clamping and the dismounting of the thermometer to be tested are realized; the setting of spacing hole prevents that the slide bar from coming off from the regulating part.

In one embodiment, the number of the guide rods is two, the two guide rods are arranged in a flush manner along the longitudinal direction of the fixed column, a gap is arranged between the two guide rods, one end of the first sliding rod is movably connected with one of the guide rods, the other end of the first sliding rod is movably connected with the other guide rod, one end of the second sliding rod is movably connected with one of the guide rods, and the other end of the second sliding rod is movably connected with the other guide rod. The two ends of the first sliding rod and the second sliding rod are respectively connected with the two guide rods, so that the first sliding rod and the second sliding rod move along the guide direction of the guide rods, and the first sliding rod and the second sliding rod can move conveniently; meanwhile, the first sliding rod and the second sliding rod are not easy to swing in the moving process, and the stability of the first sliding rod and the second sliding rod in the moving process is improved.

In one embodiment, the pressing mechanism comprises a position adjusting part and a pressing plate arranged in a fixing groove, a threaded hole is formed in the side wall of the fixing block, a corresponding thread is formed in the position adjusting part, the position adjusting part penetrates through the threaded hole and is movably connected with the pressing plate, one end of the lifting mechanism is connected with the fixing block, and the other end of the lifting mechanism is connected with the moving mechanism. The reference thermometer is placed in the fixing groove, the movement of the pressing plate is controlled by controlling the position adjusting piece, the pressing plate abuts against the reference thermometer, the installation of the reference thermometer is further completed, the operation is convenient, and the position of the reference thermometer is adjusted by matching with the lifting mechanism.

In one embodiment, the moving mechanism comprises a first guide rail and a second guide rail, the first guide rail and the second guide rail are both arranged on the support body, the first guide rail is arranged along the horizontal transverse direction of the support body, the second guide rail is arranged along the horizontal longitudinal direction of the support body, a connecting block is arranged on the second guide rail, the first guide rail is movably connected with the second guide rail through the connecting block, and the first clamp and the second clamp are both movably connected with the first guide rail. The first clamp and the second clamp are movable on the first guide rail and can horizontally and transversely move along the first guide rail, so that the rapid translation and positioning are facilitated, and the flexibility of the clamp is improved; the first guide rail moves along the second guide rail, and the distance between the clamp and the test point can be adjusted.

In one embodiment, a first sliding block and a second sliding block are arranged on the first guide rail, the first clamp is movably connected with the first guide rail through the first sliding block, the second clamp is movably connected with the first guide rail through the second sliding block, and positioning parts are arranged on the first sliding block and the second sliding block. The slider is provided with and does benefit to first anchor clamps and second anchor clamps and moves on first guide rail, through the position of setting element with fixed slider, prevents that first anchor clamps and second anchor clamps from removing, influences the normal clear of measuring.

A method of operating a radiation thermometer certification calibration apparatus comprising the steps of:

a. installing a first clamp: mounting a first clamp to a moving mechanism;

b. installing a thermometer to be tested: placing the thermometer to be tested in a clamping space of a first clamp, controlling a first sliding rod and a second sliding rod to move by controlling an adjusting mechanism, further driving a first clamping strip and a second clamping strip to move, clamping the thermometer to be tested to a state with an adjustable posture, aligning the thermometer to be tested with the test point, and then controlling the adjusting mechanism to fix and maintain the posture of the thermometer to be tested;

c. installing a reference thermometer: placing a reference thermometer in a fixing groove of a second fixture, fixing the reference thermometer by adjusting a pressing mechanism, and adjusting the position of the reference thermometer by an elevating mechanism;

d. and (3) verification and calibration of temperature points: the second clamp provided with the reference thermometer is moved to a test position to measure a temperature reference value, then the second clamp is moved towards the direction far away from the test position, then the first clamp provided with the tested thermometer is moved to the test position to measure a temperature measurement value, and the temperature average value is obtained by repeating multiple times of measurement.

The calibration device for the radiation thermometer provided by the invention fixes the thermometer to be tested by using the clamp, has higher aiming precision and improves the measurement accuracy; the long clamping strips are used for clamping the thermometer to be detected, so that the device can adapt to thermometers in various shapes, the application range of the radiation thermometer calibration device is enlarged, and the device has remarkable universality; the radiation thermometer is arranged on the device, the posture of the thermometer to be detected can be flexibly, conveniently and quickly adjusted and fixedly kept, and the detection operation is simpler and more convenient.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles and effects of the invention.

Unless otherwise specified or defined, the same reference numerals in different figures refer to the same or similar features, and different reference numerals may be used for the same or similar features.

Fig. 1 is a schematic view showing the overall configuration of a radiation thermometer verification and calibration apparatus according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a in fig. 1.

Fig. 3 is a schematic structural diagram of a first clamp according to a first embodiment of the invention.

Fig. 4 is a schematic structural diagram of a first clamp according to a second embodiment of the present invention.

Description of reference numerals:

10. a stent body; 20. a first clamp; 21. a base; 211. a fixing hole; 22. a support portion; 23. a first slide bar; 24. a second slide bar; 25. a long holding strip; 251. a first holding strip; 252. a second holding strip; 30. a second clamp; 31. a fixed block; 32. fixing grooves; 33. a hold-down mechanism; 331. a positioning member; 332. pressing a plate; 34. a lifting mechanism; 40. an adjustment mechanism; 41. a first fixed column; 42. a second fixed column; 43. an adjustment member; 431. a fixed part; 432. a screwing part; 433. a movable portion; 44. a guide bar; 45. a limiting block; 50. a moving mechanism; 51. a first guide rail; 511. a first positioning hole; 512. a second positioning hole; 52. a second guide rail; 53. connecting blocks; 54. a graduated scale; 60. a first slider; 601. a spring ball plunger is tightly fixed; 61. a second slider; 611. a stop bolt; 70. a drive motor; 71. a linkage assembly; 72. an upper computer; 73. a lower computer; 80. a sighting mechanism; 81. an aiming ring; 82. a shielding plate; 83. a square frame; 84. a support screw; 85. adjusting the nut; 90. a radiation source; 91. the center of reference.

Detailed Description

In order to facilitate an understanding of the invention, specific embodiments thereof will be described in more detail below with reference to the accompanying drawings.

Unless specifically stated or otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the case of combining the technical solutions of the present invention in a realistic scenario, all technical and scientific terms used herein may also have meanings corresponding to the purpose of achieving the technical solutions of the present invention.

As used herein, unless otherwise specified or defined, "first" and "second" … are used merely for name differentiation and do not denote any particular quantity or order.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items, unless specified or otherwise defined.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.

As shown in fig. 1 to 4, the radiation thermometer calibrating and calibrating device includes a support body 10, a first clamp 20 and a second clamp 30, where the first clamp 20 includes a base 21, a support portion 22, a first slide bar 23, a second slide bar 24, a first clamping bar 251, a second clamping bar 252 and an adjusting mechanism 40, the support portion 22 and the adjusting mechanism 40 are both disposed on the base 21, one end of the first clamping bar 251 is connected to the first slide bar 23, the other end is connected to the support portion 22, one end of the second clamping bar 252 is connected to the second slide bar 24, the other end is connected to the support portion 22, a clamping space is formed between the first clamping bar 251, the second clamping bar 252 and the support portion 22, the first clamping bar 251 and the second clamping bar 252 are integrally disposed and form a long clamping bar 25, and both the first slide bar 23 and the second slide bar 24 are connected to the adjusting mechanism 40; the second clamp 30 comprises a fixed block 31 provided with a fixed groove 32, a pressing mechanism 33 and a lifting mechanism 34, wherein the pressing mechanism 33 and the lifting mechanism 34 are connected with the fixed block 31; the support body 10 is provided with a moving mechanism 50, and the first clamp 20 and the second clamp 30 are both connected with the moving mechanism 50.

The thermometer to be detected is placed in the clamping space of the first clamp 20, the first slide bar 23 and the second slide bar 24 are gradually closed by controlling the adjusting mechanism 40, the first clamping strip 251 and the second clamping strip 252 are simultaneously driven to gradually close, the thermometer to be detected is clamped between the first clamping strip 251 and the second clamping strip 252, the thermometer to be detected in various shapes and types can be clamped by matching the first clamping strip 251 and the second clamping strip 252, the application range of the radiation thermometer calibrating device is improved, the thermometer is not easy to loosen and influence the normal operation of measurement, and the accuracy of measurement is improved; in addition, connecting the first fixture 20 and the second fixture 30 with the moving mechanism 50 facilitates rapid translation, positioning, and interchanging positions.

In one embodiment, the long clamping strip 25 is an elastic sheet, and when the long clamping strip 25 abuts against the thermometer to be tested, the long clamping strip 25 can deform according to the shape of the thermometer to be tested, so that the long clamping strip can be more easily adapted to the thermometer to be tested; the middle part of the long holding strip 25 is bent to form a recess and is movably connected with the supporting part 22, one end of the long holding strip 25 is connected with the first sliding rod 23, the other end of the long holding strip is connected with the second sliding rod 24, and the middle part of the long holding strip 25 is movably connected with the supporting part 22, so that the degree of freedom of horizontal movement of the two ends of the long holding strip 25 is improved, and the normal work of the long holding strip 25 is facilitated; two long clamping strips 25 are arranged, and the two long clamping strips 25 are longitudinally arranged along the supporting part 22, so that the clamping stability is improved, and the thermometer to be tested is clamped more tightly.

The radiation thermometer calibration device is matched with the radiation source 90 to work, the radiation source 90 is provided with a reference center 91 mark, which is a furnace chamber center external reference point marked on the surface of the radiation source 90 shell and is positioned on the same horizontal plane with the furnace chamber center, so as to improve the aiming accuracy of the thermometer to be tested.

As shown in fig. 3 or 4, the supporting portion 22 of the first fixture 20 is provided with a sighting mechanism 80, the sighting mechanism 80 includes a sighting ring 81, a shielding plate 82, a square frame 83, a supporting screw 84 and an adjusting nut 85, the shielding plate 82 is mounted on the square frame 83 through a hinge to open and close the shielding plate 82, the sighting ring 81 is located above the shielding plate 82, the adjusting nut 85 is disposed on the supporting screw 84 to adjust the height of the square frame 83, and the square frame 83 is connected with the supporting portion 22 through the supporting screw 84 and the adjusting nut 85; before measurement, the shielding plate 82 is closed, a probe of the thermometer to be detected is close to the shielding plate 82, auxiliary aiming laser of the thermometer penetrates through the aiming ring 81 to be aligned to the reference center 91 of the radiation source 90, the posture of the thermometer to be detected meets the measurement requirement, the thermometer to be detected aims at the reference center 91 mark of the radiation source 90 through the aiming ring 81, the shielding plate 82 is opened after shielding is not less than 30s in front of the thermometer to be detected by the shielding plate 82, measurement is carried out again, measurement errors are reduced, and accuracy is improved.

The adjusting mechanism 40 includes a first fixing column 41, a second fixing column 42 and an adjusting piece 43, the first fixing column 41 and the second fixing column 42 are both disposed on the base 21, a guide bar 44 is connected between the first fixing column 41 and the second fixing column 42, in one embodiment, two guide bars 44 are provided, the two guide bars 44 are flush with each other along a longitudinal direction of the fixing column, a gap is provided between the two guide bars 44, two ends of the first sliding bar 23 and the second sliding bar 24 are sleeved with the guide bars 44 through linear bearings, so that the first sliding bar 23 and the second sliding bar 24 can freely slide on the guide bars 44, and the adjusting piece 43 is disposed on the second fixing column 42 and connected with the first sliding bar 23 and the second sliding bar 24. The two ends of the first sliding rod 23 and the second sliding rod 24 are respectively connected with the two guide rods 44, so that the first sliding rod 23 and the second sliding rod 24 move along the guide direction of the guide rods 44, the synchronous movement of the two ends of the first sliding rod 23 and the second sliding rod 24 is facilitated, and the first sliding rod 23 and the second sliding rod 24 move more smoothly; meanwhile, the first sliding rod 23 and the second sliding rod 24 are not easy to swing in the moving process, and the stability of the first sliding rod 23 and the second sliding rod 24 in the moving process is improved.

The adjusting member 43 includes a fixing portion 431, a screwing portion 432 and a moving portion 433, the fixing portion 431 is disposed on the second fixing column 42, as shown in fig. 3, in one embodiment, the screwing portion 432 of the adjusting member 43 is a nut, the moving portion 433 is a stepped shaft having a thread at one end and an optical axis at the middle, a threaded hole corresponding to the thread of the moving portion 433 is disposed on the screwing portion 432, the other end of the moving portion 433 is fixedly connected with the middle portion of the first sliding rod 23, a through hole is disposed in the middle portion of the second sliding rod 24 and sleeved on the outer wall of the moving portion 433, and the second sliding rod 24 is close to the screwing portion 432 of the adjusting member 43. By rotating the screwing part 432 and further moving the movable part 433, when the screwing part 432 is rotated clockwise, the first sliding rod 23 and the second sliding rod 24 drive the long holding strip 25 to move closer to the middle; when the screwing part 432 is rotated counterclockwise, the first sliding rod 23 and the second sliding rod 24 drive the long holding strip 25 to move towards two ends, so that the operation of holding and detaching the thermometer to be tested is more convenient and simpler.

As shown in fig. 4, in one embodiment, the movable portion 433 is a shaft having a first thread section and a second thread section, the threads of the first thread section and the second thread section are arranged in opposite directions, the first slide bar 23 is provided with a threaded hole corresponding to the first thread section, the second slide bar 24 is provided with a threaded hole corresponding to the second thread section, one end of the movable portion 433 is fixedly connected to the screwing portion 432, and the other end is provided with a limit block 45. The screwing part 432 is rotated to drive the movable part 433 to rotate, and in the rotating process of the movable part 433, the first slide bar 23 and the second slide bar 24 move oppositely or reversely, so that the long holding strip 25 is driven to move towards the middle or move towards the two ends, and the thermometer to be tested is clamped and dismounted; the limit hole limits the slide bar from falling off the adjusting piece 43.

The pressing mechanism 33 comprises a positioning part 331 and a pressing plate 332 arranged in the fixing groove 32, the positioning part 331 is a bolt, a threaded hole is formed in the side wall of the fixing block 31, a corresponding thread is formed in the positioning part 331, and the positioning part 331 penetrates through the threaded hole and is movably connected with the pressing plate 332. The reference thermometer is placed in the fixing groove 32, the movement of the pressing plate 332 is controlled by controlling the positioning piece 331, the pressing plate 332 abuts against the reference thermometer, and therefore the installation of the reference thermometer is completed, and the operation is convenient; the lifting mechanism 34 employs an existing X-shaped scissor lift.

The moving mechanism 50 comprises 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 support body 10, the first guide rail 51 and the second guide rail 52 are mutually vertical in the horizontal direction, the second guide rail 52 is parallel to the central axis of the furnace chamber of the radiation source 90, the first guide rail 51 is arranged along the horizontal transverse direction of the support body 10, the second guide rail 52 is arranged along the horizontal longitudinal direction of the support 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 over against the center of the furnace chamber, the second positioning hole 512 is over against the reference center 91, the hole spacing is equal to the center distance between the center of the furnace chamber and the reference center 91, and the first guide rail 51 is further provided with a graduated scale 54;

the second guide rail 52 is provided with a connecting block 53, the first guide rail 51 is movably connected with the second guide rail 52 through the connecting block 53, the first guide rail 51 is movably connected with a first slide block 60 and a second slide block 61, the first clamp 20 is movably connected with the first guide rail 51 through the first slide block 60, one end of the lifting mechanism 34 of the second clamp 30 is connected with the fixed block 31, the other end is connected with the second slide block 61, in one embodiment, the base 21 is wedge-shaped, and has fixing holes 211 at both sides, so as to quickly mount the first clamp 20, a wedge-shaped groove (not shown in the figure) corresponding to the base 21 is arranged on the upper surface of the first slide block 60, a locking spring ball plunger 601 is mounted on two sides in the groove, the first clamp 20 can be quickly installed and fixed through the wedge-shaped groove and the cooperation of the ball plunger and the fixing hole 211 of the base 21 of the first clamp 20; the first slider 60 is further provided with a locking spring ball plunger 601 which is matched with the first positioning hole 511 and the second positioning hole 512 of the first guide rail 51, so that the slider can be quickly positioned, and the locking spring ball plunger 601 is a positioning part of the first slider 60; the positioning member of the second slider 61 is a stop bolt 611, and the second slider 61 can be prevented from moving by screwing the stop bolt 611 against the first rail 51.

The support body 10 is further provided with a driving motor 70, a linkage assembly 71, an upper computer 72 and a lower computer 73, the driving motor 70 is connected with the connecting block 53 through the linkage assembly 71, the linkage assembly 71 is driven to drive the connecting block 53 to move, so that the first guide rail 51 is driven to move along the second guide rail 52, and the linkage assembly 71 is a ball screw; the control of the driving motor 70 is realized by sending an instruction through the upper computer 72 and executing the instruction by the lower computer 73, the verification personnel sets the verification distance through the upper 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 positions; the verification process adopts program control and the driving motor 70 to control the verification distance, thereby improving the automation and mechanization degree of verification and calibration operation, lightening the working strength, improving the verification accuracy and simultaneously realizing the electronization and data digitization of the certificate.

The first embodiment is as follows:

as shown in fig. 2, the adjusting part 43 of the first clamp 20 adopts a screwing part 432 as a nut, the movable part 433 is a stepped shaft with a thread at one end and an optical axis in the middle, a threaded hole corresponding to the thread of the movable part 433 is formed in the screwing part 432, the other end of the movable part 433 is fixedly connected with the middle part of the first sliding rod 23, a through hole is formed in the middle part of the second sliding rod 24 and sleeved on the outer wall of the movable part 433, and the second sliding rod 24 is close to the screwing part 432 of the adjusting part 43.

The method of operating a radiation thermometer verification and calibration apparatus, comprising the steps of:

a. installation reference center 91: firstly, adjusting the position of the support body 10 to make the second guide rail 52 parallel to the central axis of the furnace chamber of the radiation source 90 and the first positioning hole 511 of the first guide rail 51 opposite to the center of the furnace chamber; the reference center 91 is then marked at a horizontal position where the housing surface of the radiation source 90 is at a distance from the oven cavity center, such that the reference center 91 is in positive alignment with the second positioning hole 512 of the first guiding rail 51.

b. Mounting the first clamp 20: the first slide block 60 is moved to be positioned on the second positioning hole 512 (corresponding to the reference center 91) of the first guide rail 51, the first fixture 20 is placed in the wedge-shaped groove of the first slide block 60, and the ball plunger on the first slide block 60 is clamped into the fixing hole 211 on the first fixture 20.

c. Installing a thermometer to be tested: placing the thermometer to be detected into the first clamp 20, controlling the adjusting mechanism 40 to control the first slide bar 23 and the second slide movement, further driving the first clamping bar 251 and the second clamping bar 252 to move, clamping the thermometer to be detected to a state that the cloth does not fall off but the posture of the cloth can be adjusted, pressing down the measuring key at this time, the thermometer to be detected can emit red laser for auxiliary aiming, adjusting the posture of the thermometer, enabling the laser point to fall on the reference center 91, and simultaneously screwing the first clamp 20, so that the aiming posture of the thermometer is kept and is firm enough; the first holder 20 with the thermometer mounted thereon is removed from the lateral slide as a whole and set aside for measurement.

d. If a plurality of first jigs 20 are used for a plurality of thermometers to be tested, the steps b and c are repeated, and all the other thermometers to be tested are mounted.

e. Installing a reference thermometer: the reference thermometer is placed in the fixing groove 32 of the second fixture 30, the second fixture 30 is moved to the right front of the center of the oven cavity, the elevating mechanism 34 of the second fixture 30 is adjusted and the necessary horizontal movement is made while observing using the eyepiece of the reference thermometer, so that the probe of the reference thermometer is aimed at the center of the oven cavity, finally the pressing mechanism 33 is adjusted to fix the reference thermometer, the stop bolt 611 is screwed to prevent the slider from sliding, and the scale 54 is observed and the scale value of the second slider 61 on the first guide rail 51 is recorded.

f. Measuring the temperature of the furnace chamber: firstly, moving the second fixture 30 with the reference thermometer to the recorded scale value, measuring the reference value of the temperature of the furnace chamber, and moving aside after the repeated measurement is finished; then, the first slider 60 is moved to the first positioning hole 511, and the first fixture 20 with the thermometer to be tested is installed and positioned; then, the upper computer 72 controls the second guide rail 52 to move, the thermometer to be detected is moved to the detection distance of the thermometer, a measurement key is pressed to obtain a measurement value, and the average value is repeatedly calculated for multiple times; similarly, the first fixture 20 equipped with other thermometers to be tested is replaced, and the testing distance is controlled by the motor, so that the measurement of all thermometers to be tested is completed.

h. Calibration of other temperature points: the set temperature of the radiation source 90 is changed and step f is repeated.

Example two:

as shown in fig. 3, the adjusting member 43 of the first clamp 20 is a shaft having a movable portion 433 and a first thread section and a second thread section, the threads of the first thread section and the second thread section are oppositely arranged, a threaded hole corresponding to the first thread section is formed in the middle of the first slide bar 23, a threaded hole corresponding to the second thread section is formed in the middle of the second thread section, one end of the movable portion 433 is fixedly connected to the screwing portion 432, and the other end of the movable portion is provided with a limiting block 45.

The operation method is the same as the first embodiment.

The calibration device for the radiation thermometer provided by the invention fixes the thermometer to be tested by using the clamp, has higher aiming precision and improves the measurement accuracy; the thermometer to be detected is clamped by the elastic clamping strip, so that the thermometer calibrating device can adapt to thermometers in various shapes, the application range of the thermometer calibrating device is improved, and the thermometer calibrating device has remarkable universality; the posture of the thermometer to be detected is adjusted by using the wrist of a person, so that the requirement of measurement on aiming can be flexibly, conveniently and quickly met, and the detection operation is simpler and more convenient.

The operation method of the verification and calibration device for the radiation thermometer, provided by the invention, combines the detected thermometers with different shapes and sizes with the unified fixture for use one by one, solves the problem of different shapes and sizes of the detected thermometers by utilizing the standardized structure and the same installation mode of the fixture, improves the work efficiency of verification and calibration, keeps the detected thermometers unchanged in measurement postures in the whole verification and calibration process, ensures the consistency of measurement areas through the accurate positioning of the fixture, and improves the accuracy of verification and calibration; in addition, the calibration operation method adopts the motor to control the calibration distance and utilizes the standardized fixture to carry out normalized installation on the thermometers to be tested with different shapes and sizes, thereby improving the automation and mechanization degree of the calibration operation.

The above embodiments are intended to be illustrative, reappear and derive the technical solutions of the present invention, and thus to fully describe the technical solutions, objects and effects of the present invention, so as to make the public more thoroughly and comprehensively understand the disclosure of the present invention, and not to limit the protection scope of the present invention; the above examples are not intended to be exhaustive of the invention and there may be many other embodiments not listed. Any alterations and modifications without departing from the spirit of the invention are within the scope of the invention.

Claims

1. The radiation thermometer calibrating and calibrating device comprises a bracket body, a first clamp and a second clamp, the first clamp comprises a base, a supporting part, a first sliding rod, a second sliding rod, a first clamping strip, a second clamping strip and an adjusting mechanism, the supporting part and the adjusting mechanism are both arranged on the base, one end of the first clamping strip is connected with the first sliding rod, the other end is connected with the supporting part, one end of the second holding strip is connected with the second sliding rod, the other end of the second holding strip is connected with the supporting part, a holding space is formed among the first holding strip, the second holding strip and the supporting part, the first slide bar and the second slide bar are both connected with an adjusting mechanism, the second clamp comprises a fixed block provided with a fixed groove, a pressing mechanism and a lifting mechanism, the pressing mechanism and the lifting mechanism are connected with the fixed block, the support body is provided with a moving mechanism, and the first clamp and the second clamp are connected with the moving mechanism.

2. The verification and calibration device for the radiation thermometer according to claim 1, wherein the first holding strip and the second holding strip are integrally arranged and form a long holding strip, the long holding strip is made of elastic material, the middle part of the long holding strip is movably connected with the support part, one end of the long holding strip is connected with the first sliding rod, and the other end of the long holding strip is connected with the second sliding rod.

3. The radiation thermometer calibrating and calibrating device according to claim 1, wherein the adjusting mechanism comprises a first fixing column, a second fixing column and an adjusting piece, the first fixing column and the second fixing column are both disposed on the base, a guide rod is connected between the first fixing column and the second fixing column, the first sliding bar and the second sliding bar are movably connected to the guide rod, and the adjusting piece is disposed on the second fixing column and connected to the first sliding bar and the second sliding bar.

4. The verification and calibration device for the radiation thermometer according to claim 3, wherein the adjusting member comprises a fixed portion, a screwing portion and a movable portion, the fixed portion is disposed 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 with the first sliding rod, and the second sliding rod is sleeved on the outer wall of the movable portion and is close to the screwing portion of the adjusting member.

5. The radiation thermometer calibrating and calibrating device according to claim 3, wherein the adjusting member comprises a fixing portion, a screwing portion and a moving portion, the fixing portion is arranged on the second fixing column, the moving portion is provided with a first thread section and a second thread section, the threads of the first thread section and the second thread section are arranged in a reverse direction, the first slide bar is provided with a threaded hole corresponding to the first thread section, the second thread section is provided with a threaded hole corresponding to the second thread section, one end of the moving portion is fixedly connected with the screwing portion, and the other end of the moving portion is provided with a limiting block.

6. The radiation thermometer calibrating and calibrating device as claimed in claim 3, wherein two guide rods are provided, the two guide rods are arranged in a flush manner along the longitudinal direction of the fixed column, a gap is provided between the two guide rods, one end of the first slide rod is movably connected with one of the guide rods, the other end of the first slide rod is movably connected with the other guide rod, one end of the second slide rod is movably connected with one of the guide rods, and the other end of the second slide rod is movably connected with the other guide rod.

7. The verification and calibration device for the radiation thermometer according to any one of the claims 1 to 6, wherein the pressing mechanism comprises a positioning member and a pressing plate disposed in a fixing groove, a threaded hole is disposed on a sidewall of the fixing block, a corresponding thread is disposed on the positioning member, the positioning member passes through the threaded hole and is movably connected with the pressing plate, one end of the lifting mechanism is connected with the fixing block, and the other end of the lifting mechanism is connected with the moving mechanism.

8. The radiation thermometer calibrating and calibrating device as claimed in any one of claims 1 to 6, wherein the moving mechanism comprises a first guide rail and a second guide rail, the first guide rail and the second guide rail are both disposed on the support body, the first guide rail is disposed along a horizontal transverse direction of the support body, the second guide rail is disposed along a horizontal longitudinal direction of the support body, the second guide rail is provided with a connecting block, the first guide rail is movably connected with the second guide rail through the connecting block, and the first clamp and the second clamp are both movably connected with the first guide rail.

9. The radiation thermometer calibrating and calibrating device according to claim 8, wherein the first guide rail is provided with a first slider and a second slider, the first fixture is movably connected with the first guide rail through the first slider, the second fixture is movably connected with the first guide rail through the second slider, and the first slider and the second slider are both provided with positioning parts.

10. A method of operating a radiation thermometer verification and calibration apparatus, comprising the steps of:

a. installing a first clamp: mounting a first clamp to a moving mechanism;