Calibration instrument

Abstract

The invention relates to a calibration instrument, and belongs to the technical field of measuring instrument calibration, the calibration instrument comprises a base, a support rod, an upper clamping mechanism, a lower clamping mechanism and a detection mechanism, the support rod is arranged on the base, the upper clamping mechanism is arranged on the support rod and used for supporting a measuring instrument, the lower clamping mechanism is arranged on the support rod, and the detection mechanism is arranged on the support rod. The lower clamping mechanism comprises a lower cantilever, a guide cylinder, a reset cylinder, a lower guide rod and a driving assembly, the lower cantilever is arranged on the supporting rod, the guide cylinder is arranged on the lower cantilever, the reset cylinder is slidably arranged on the outer wall of the guide cylinder in a sleeving mode, and the lower guide rod is arranged on the reset cylinder and slidably arranged on the guide cylinder in a penetrating mode; the driving assembly is arranged on the base and used for driving the lower guide rod to move towards the upper clamping mechanism. The detection mechanism is arranged on the base and used for detecting the movement amount of the lower clamping mechanism. The device has the advantages that the lower guide rod moves stably and is stressed evenly in the whole process, and the detection precision of a trace deformation measuring instrument is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of calibrating measuring instruments, and particularly to a calibrator. Background Art

[0002] An extensometer is a commonly used instrument in mechanical experiments. It is an instrument for measuring the linear deformation between two points of a component and other objects, and is an indispensable precision instrument in mechanical testing. In order to ensure the detection accuracy of the extensometer, a calibrator is required to calibrate the extensometer.

[0003] The patent with the authorization announcement number CN112033320B discloses a fully automatic high-precision extensometer calibrator. The upper end of the motor axial guiding base is provided with a motor guiding plate. Deep groove ball bearings that move along the waist-shaped through groove are arranged in the waist-shaped through grooves. A balance rod passes through the deep groove ball bearing holes. The lower end of the motor connection flange is connected with a closed-loop stepping motor, and the upper end of the motor connection flange is connected with a dividing shaft guide rod. A stroke guide sleeve is sleeved on the outer periphery of the dividing shaft guide rod. A guide rod flange is connected between the dividing shaft guide rod and the stroke guide sleeve. An extensometer clamping and moving guide rod connected to the dividing shaft guide rod is inserted into the stroke guide sleeve. The upper end of the main support column is connected with a main support sub-column. The upper end of the extensometer clamping and moving guide rod is provided with a centering rod. The fully automatic high-precision extensometer calibrator also includes a grating micrometer and a thermal printer. By using a closed-loop stepping motor with a high-precision photoelectric encoder as the power and measurement core component, the displacement change amount of the extensometer can be accurately detected, and the resolution can reach 0.1um.

[0004] However, this extensometer calibrator realizes the action of pushing out or retracting the extensometer clamping and moving guide rod through the rebound and contraction of the compression spring in the stroke guide sleeve. During the expansion and contraction process of the compression spring, the stability is difficult to guarantee, the acting force on the extensometer clamping and moving guide rod is prone to deviation, and the acting force of the compression spring on the extensometer clamping and moving guide rod will change when it is compressed and contracted, which will affect the detection accuracy of measuring instruments with high precision requirements for micro deformation such as extensometers and micrometers. Summary of the Invention

[0005] In order to improve the detection accuracy of measuring instruments for micro deformation, this application provides a calibrator.

[0006] The calibrator provided by this application adopts the following technical solutions: A calibrator, comprising a base, a support rod, an upper clamping mechanism, a lower clamping mechanism and a detection mechanism. The support rod is arranged on the base. The upper clamping mechanism is arranged on the support rod and is used for supporting a measuring instrument. The lower clamping mechanism is arranged on the support rod and is used for driving the measuring instrument to move towards the upper clamping mechanism. The lower clamping mechanism includes a lower cantilever, a guide cylinder, a reset cylinder, a lower guide rod and a driving component. The lower cantilever is arranged on the support rod. The guide cylinder is arranged on the lower cantilever. The reset cylinder is slidably sleeved on the outer wall of the guide cylinder. The lower guide rod is arranged on the reset cylinder and slidably penetrates through the guide cylinder. The driving component is arranged on the base and is used for driving the lower guide rod to move towards the upper clamping mechanism. The detection mechanism is arranged on the base and is used for detecting the moving amount of the lower clamping mechanism.

[0007] By adopting the above technical solution, the measuring instrument to be detected is placed between the upper clamping mechanism and the lower clamping mechanism. The driving component drives the lower guide rod to move towards the upper clamping mechanism. During the process, the lower guide rod drives the reset cylinder to move. The guide cylinder guides the movement of the lower guide rod to ensure the stability of the movement of the lower guide rod. The lower guide rod presses the measuring instrument to cause the measuring instrument to generate displacement. The detection mechanism detects the moving amount of the lower clamping mechanism, so as to detect the displacement amount of the measuring instrument, and further realize the calibration of the measuring instrument. After the detection is completed, the driving component no longer drives the lower guide rod. The lower guide rod moves and resets in the direction away from the upper clamping mechanism under the gravity of the reset cylinder. During the whole process, the lower guide rod moves stably and is evenly stressed, effectively improving the detection accuracy of the micro-deformation measuring instrument.

[0008] Optionally, a limiting hole is formed in the guide cylinder along the direction towards the upper clamping mechanism. A guide post is arranged on the reset cylinder. The guide post passes through the limiting hole and is connected to the lower guide rod.

[0009] By adopting the above technical solution, during the movement of the reset cylinder and the lower guide rod, the side wall of the limiting hole guides the movement of the guide post, so as to guide the movement of the reset cylinder and the lower guide rod, so that the reset cylinder and the lower guide rod can only move in the direction towards the upper clamping mechanism, improving the stability of the movement of the reset cylinder and the lower guide rod.

[0010] Optionally, the driving component includes a driving motor and a driving rod. The driving motor is arranged on the base. The driving rod is threadedly penetrated through the guide cylinder and is coaxially connected to the output shaft of the driving motor. The driving rod abuts against the lower guide rod.

[0011] By adopting the above technical solution, when the driving motor is started, the output shaft of the driving motor drives the driving rod to rotate. The driving rod moves upward in the guide cylinder and abuts against the lower guide rod, and then the lower guide rod can be driven to move towards the upper clamping mechanism.

[0012] Optionally, the upper clamping mechanism includes an upper cantilever, an upper guide rod, a locking component, and a positioning member. The upper cantilever is slidably disposed on the support rod. The upper guide rod slidably penetrates through the upper cantilever and faces the lower guide rod. The locking component is disposed on the upper cantilever and is used to position the upper guide rod. The positioning member is disposed on the upper cantilever and is used to position the upper cantilever.

[0013] By adopting the above technical solution, the upper cantilever is driven to slide on the support rod, and then the upper cantilever is positioned by the positioning member. Then, the upper guide rod is slidably penetrated through the upper cantilever so that the upper guide rod faces the lower guide rod, and the upper guide rod is positioned by the locking component, thus completing the installation and position adjustment of the upper guide rod and improving the applicability of the upper guide rod and the lower guide rod for different distance requirements.

[0014] Optionally, the locking component includes a deformation sleeve and a locking bolt. A clamping hole is formed on the upper cantilever. The deformation sleeve is disposed in the clamping hole. A deformation slit is formed on the deformation sleeve. The upper guide rod slidably penetrates through the deformation sleeve. A deformation slit is formed on the upper cantilever communicating with the clamping hole. The locking bolt is threadedly disposed on the upper cantilever on one side of the deformation slit and is threadedly connected to the upper cantilever on the other side of the deformation slit.

[0015] By adopting the above technical solution, the upper guide rod is passed through the deformation sleeve. After adjusting the distance between the upper guide rod and the lower guide rod, the locking bolt is screwed, so that the two side walls of the deformation slit approach each other, the upper cantilever on both sides of the deformation slit tightens to clamp the deformation sleeve, and the two sides of the deformation slit are driven to approach each other, thereby causing the deformation sleeve to tighten and clamp the upper guide rod, facilitating the installation and positioning of the upper guide rod quickly and conveniently.

[0016] Optionally, the detection mechanism includes a laser interferometer, an angle mirror, a linear mirror, and a control host. The laser interferometer is disposed on the base and is used to emit and receive light. The angle mirror is disposed on the base and is used to reflect the light emitted by the laser interferometer and reflect the light back to the laser interferometer. The linear mirror is disposed on the reset cylinder and is used to reflect the light reflected by the angle mirror to the angle mirror. The control host is disposed on the base and is electrically connected to the laser interferometer.

[0017] By adopting the above technical solution, during the detection process, the reset cylinder drives the linear mirror to move. The laser interferometer emits light. The light is reflected by the angle mirror to the linear mirror. The linear mirror reflects the light back to the angle mirror. The angle mirror reflects the light to the receiving end of the laser interferometer. The laser interferometer then transmits the optical path received by the receiving end of the laser interferometer at the initial position of the linear mirror and the optical path received by the receiving end of the laser interferometer when the linear mirror moves to the farthest distance along with the reset cylinder to the control host. Through the change of the two optical paths, the moving distance of the reset cylinder can be obtained, and then the displacement of the measuring instrument can be obtained, accurately calibrating the measuring instrument.

[0018] Optionally, an angular interferometer group for reflecting the light reflected by the angular mirror back to the angular mirror is provided on the lower guide rod.

[0019] By adopting the above technical solution, when the lower guide rod moves, it drives the angular interferometer group to move. The angular mirror reflects the light to the angular interferometer group, and the angular interferometer group then reflects the light back to the angular mirror. The angular mirror reflects the light to the receiving end of the laser interferometer. By analyzing the optical path received by the receiving end of the laser interferometer at the initial position of the angular interferometer group and the change in the optical path received by the receiving end of the laser interferometer when the angular interferometer group moves to the farthest distance along with the lower guide rod, the moving distance of the lower guide rod can be obtained. Furthermore, the displacement of the measuring instrument can be measured from the movement of the lower guide rod, and compared with the measurement of the displacement of the measuring instrument from the movement of the reset cylinder, to ensure the accuracy of calibrating the measuring instrument.

[0020] Optionally, the base includes a chassis, a level gauge, and support feet. The level gauge is arranged on the chassis and is used to detect the levelness of the chassis. A plurality of support feet are arranged on the chassis, and the heights of the plurality of support feet are all adjustable.

[0021] By adopting the above technical solution, the level gauge detects the levelness of the chassis, and then by adjusting the heights of the support feet at different positions, the chassis can be adjusted to be level, ensuring the installation levelness of the calibrator.

[0022] Optionally, a lifting assembly for driving the chassis to lift is arranged on the chassis. The lifting assembly includes a jacking block, a wedge block, a support block, and a control member. The jacking block is arranged on the chassis, the wedge block is slidably arranged on the jacking block, the support block is slidably arranged on the wedge block, the fitting surface between the wedge block and the support block is inclined, and the control member is arranged on the chassis and is used to drive the wedge block to slide.

[0023] By adopting the above technical solution, when adjusting the levelness of the chassis, the control member drives the wedge block to slide, so that the wedge block squeezes the support block, and the wedge block drives the jacking block to lift the chassis. Then, directly adjust the height of the support feet on the offset side to improve the convenience of adjusting the levelness of the chassis, and it can also provide auxiliary support for the chassis to improve the stability of the chassis.

[0024] Optionally, a telescopic rod is arranged on the support block, the length of the telescopic rod is telescopic, and the telescopic rod is connected to the jacking block.

[0025] By adopting the above technical solution, when the wedge block drives the jacking block to lift or lower, the jacking block pulls the telescopic rod to expand and contract synchronously. The telescopic rod connects the jacking block and the support block, reducing the possibility of the support block generating horizontal displacement under the extrusion of the wedge block and improving the stability of the support block.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the whole process, the lower guide rod moves stably and is evenly stressed, effectively improving the accuracy of detecting the micro deformation measuring instrument; 2. During the movement of the lower guide rod, due to the limiting effect of the limiting hole on the guiding column, it will not rotate with the driving rod. Therefore, the driving of the lower guide rod can be more precisely controlled by the driving motor, improving the detection accuracy; 3. The wedge block squeezes the supporting block, and the wedge block drives the jacking block to lift the chassis, and then directly adjusts the height of the supporting feet on the offset side, improving the convenience of adjusting the levelness of the chassis, and can also assist in supporting the chassis, improving the stability of the chassis. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the calibrator according to an embodiment of the present application.

[0028] Figure 2 It is a schematic structural diagram of the base according to an embodiment of the present application.

[0029] Figure 3 It is a schematic sectional structural diagram according to an embodiment of the present application.

[0030] Figure 4 It is a schematic structural diagram of the detection mechanism according to an embodiment of the present application.

[0031] Reference numerals: 1, base; 11, chassis; 12, level; 13, support feet; 2, support rod; 21, guide groove; 3, upper clamping mechanism; 31, upper cantilever; 311, clamping hole; 312, deformation joint; 32, upper guide rod; 33, locking assembly; 331, deformation sleeve; 3311, deformation joint; 332, locking bolt; 34, positioning member; 341, handle bolt; 342, slider; 343, support bolt; 4, lower clamping mechanism; 41, lower cantilever; 42, guide cylinder; 421, limiting hole; 43, reset cylinder; 44, lower guide rod; 45, driving assembly; 451, driving motor; 452, driving rod; 5, detection mechanism; 51, laser interferometer; 52, angle mirror; 53, linear mirror; 54, control host; 6, guiding column; 7, angle interference mirror group; 8, lifting assembly; 81, jacking block; 82, wedge block; 83, support block; 84, control member; 9, telescopic rod. Detailed Embodiment

[0032] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0033] An embodiment of the present application discloses a calibrator.

[0034] Refer to Figure 1The calibration instrument includes a base 1, a support rod 2, an upper clamping mechanism 3, a lower clamping mechanism 4 and a detection mechanism 5.

[0035] Reference Figure 1 , Figure 2 The base 1 includes a chassis 11, a spirit level 12 and supporting feet 13. The spirit level 12 is installed on the chassis 11. The spirit level 12 is used to detect the horizontality of the chassis 11. In the present embodiment, the spirit level 12 is an electronic spirit level 12. A plurality of supporting feet 13 are installed at the bottom of the chassis 11. The height of the supporting feet 13 is adjustable. In the present embodiment, one supporting foot 13 is installed at each of the four corners of the bottom of the chassis 11. The supporting feet 13 include adjusting bolts and rubber pads. The adjusting bolts are threadedly installed on the chassis 11, and the rubber pads are installed on the adjusting bolts.

[0036] When installing the calibrator, after placing the calibrator on the base surface, the levelness of the chassis 11 can be detected by the level meter 12. If the chassis 11 is tilted, lift the tilted side of the chassis 11, and then turn the adjusting bolts of the supporting feet 13 on the tilted side to raise and lower the supporting feet 13. After lowering the chassis 11, the four supporting feet 13 can support the chassis 11 to maintain the stability and levelness of the chassis 11, thereby ensuring the horizontal installation of the calibrator.

[0037] Reference Figure 1 , Figure 2 A lifting assembly 8 is installed on the chassis 11. The lifting assembly 8 is used to drive the chassis 11 to move up and down. The lifting assembly 8 includes a lifting block 81, a wedge block 82, a support block 83 and a control member 84. The lifting block 81 is installed at the bottom of the chassis 11. The wedge block 82 is slidably installed in the horizontal direction on the side of the lifting block 81 away from the chassis 11. The support block 83 is slidably fitted on the wedge block 82. The fitting surfaces of the wedge block 82 and the support block 83 are inclined. The control member 84 is installed on the chassis 11. The control member 84 is used to drive the wedge block 82 to slide. In the present embodiment, the control member 84 is a control screw, which is rotatably mounted on the chassis 11 and is threadedly connected to the wedge block 82. A telescopic rod 9 is vertically mounted on the support block 83. The length of the telescopic rod 9 is retractable. The telescopic rod 9 is connected to the lifting block 81. In the present embodiment, the telescopic rod 9 includes a sleeve and a sliding rod. The sleeve is mounted on the lifting block 81, and the sliding rod is slidably inserted in the sleeve, and the sliding rod is connected to the support block 83.

[0038] When the level of the chassis 11 needs to be adjusted, the staff rotates the control screw. The control screw drives the wedge block 82 to move towards the support block 83. The inclined surface of the support block 83 squeezes the wedge block 82, driving the wedge block 82 to rise. The wedge block 82 drives the jacking block 81 and the chassis 11 to rise. During the rising process of the jacking block 81, the telescopic rod 9 extends accordingly, continuously connecting the jacking block 81 and the support block 83, reducing the possibility of the support block 83 generating displacement during the process of the wedge block 82 moving and squeezing the support block 83, and improving the stability of the support block 83. After jacking up the chassis 11, then the staff directly adjusts the support feet 13 on the inclined side of the chassis 11 to extend, so that the support feet 13 on the inclined side of the chassis 11 are pressed against the base surface to support the chassis 11, saving the process of lifting the chassis 11, and thus conveniently adjusting the level of the chassis 11. And the subsequent lifting assembly 8 can also assist in supporting the chassis 11, effectively improving the stability of the chassis 11.

[0039] Refer to Figure 1 、 Figure 3 As shown in FIGS. 、, the support rod 2 is vertically installed on the chassis 11, and the upper clamping mechanism 3 is installed on the support rod 2. The upper clamping mechanism 3 is used to support measuring instruments with very high precision requirements for micro-deformation, such as extensometers and micrometers. The upper clamping mechanism 3 includes an upper cantilever 31, an upper guide rod 32, a locking assembly 33, and a positioning member 34. The upper cantilever 31 is slidably sleeved on the support rod 2, and the positioning member 34 is installed on the upper cantilever 31. The positioning member 34 is used to position the upper cantilever 31 on the support rod 2. The positioning member 34 includes a handle bolt 341, a slider 342, and a support bolt 343. The upper cantilever 31 is provided with a clamping slot communicating with the hole through which the upper cantilever 31 is sleeved on the support rod 2. The handle bolt 341 is threadedly inserted through the upper cantilever 31 on both sides of the clamping slot. The two threads of the handle bolt 341 connected to the upper cantilever 31 on both sides of the clamping slot are opposite. The support rod 2 is provided with a guide groove 21 along the vertical direction. The upper cantilever 31 is embedded in the guide groove 21 to limit the upper cantilever 31 to only slide vertically on the support rod 2. The slider 342 is slidably embedded in the guide groove 21, and the support bolt 343 is threadedly installed on the slider 342 and abuts against the support rod 2.

[0040] After the staff adjusts the position of the upper cantilever 31 on the support rod 2, turn the handle bolt 341 to make the upper cantilever 31 on both sides of the clamping slot approach each other. The upper cantilever 31 on both sides of the clamping slot can then clamp the support rod 2. Then slide the slider 342 to abut against the bottom of the upper cantilever 31, and then turn the support bolt 343 to make the support bolt 343 abut against the support rod 2, so as to firmly position the upper cantilever 31 on the support rod 2.

[0041] Refer to Figure 1 、 Figure 3The locking assembly 33 is installed on the upper cantilever 31. The locking assembly 33 is used to position the upper guide rod 32 on the upper cantilever 31. The locking assembly 33 includes a deformation sleeve 331 and a locking bolt 332. A clamping hole 311 is provided on the upper cantilever 31. The deformation sleeve 331 is penetrated in the clamping hole 311. The upper guide rod 32 is slidably penetrated on the deformation sleeve 331. A deformation gap 3311 is provided on the deformation sleeve 331. A deformation gap 312 is provided on the upper cantilever 31. The deformation gap 312 is connected to the clamping hole 311. The locking bolt 332 is threadedly installed on the upper cantilever 31 on one side of the deformation gap 312. The locking bolt 332 extends to be threadedly connected to the upper cantilever 31 on the other side of the deformation gap 312. The threads of the locking bolt 332 connected to the upper cantilever 31 on both sides of the deformation gap 312 are reversed.

[0042] After the upper cantilever 31 is positioned on the support rod 2, the upper guide rod 32 is slidably passed through the deformation sleeve 331. After the height position of the upper guide rod 32 is adjusted, the supporting bolts 343 are screwed so that the two side walls of the deformation gap 312 are close to each other, and the upper cantilever 31 on both sides of the deformation gap 312 are tightened to drive the clamping holes 311 to tighten, and the clamping holes 311 clamp the deformation sleeve 331. At the same time, after the deformation sleeve 331 is clamped, the two sides of the deformation gap 3311 are tightened, so that the deformation sleeve 331 clamps the upper guide rod 32, and the upper guide rod 32 is conveniently and quickly positioned. In addition, the height of the upper guide rod 32 can be conveniently adjusted by adjusting the height position of the upper cantilever 31 and the height position of the upper guide rod 32 passing through the deformation sleeve 331.

[0043] Reference Figure 1 , Figure 3 The lower clamping mechanism 4 is installed on the support rod 2. The lower clamping mechanism 4 is used to drive the micro-deformation measuring instruments with high precision requirements such as extensometers and micrometers to move toward the direction of the upper guide rod 32. The lower clamping mechanism 4 includes a lower cantilever 41, a guide cylinder 42, a reset cylinder 43, a lower guide rod 44 and a driving assembly 45. The lower cantilever 41 is slidably sleeved on the support rod 2. In this embodiment, a clamping hoop is installed at the bottom of the lower cantilever 41, and the clamping hoop is clamped on the support rod 2. After adjusting the height position of the lower cantilever 41, the movable clamping hoop is abutted against the lower cantilever 41. At the bottom, drive the clamp to clamp tightly on the support rod 2, and the clamp can support the lower cantilever 41 and position the lower cantilever 41 at the current height position; the guide cylinder 42 is installed on the lower cantilever 41, and the reset cylinder 43 is slidably sleeved on the outer wall of the guide cylinder 42, and the lower guide rod 44 is slidably penetrated on the guide cylinder 42, and the lower guide rod 44 is directly opposite to the upper guide rod 32. A limiting hole 421 is provided on the guide cylinder 42 along the sliding direction of the lower guide rod 44, and a guide column 6 is threadedly installed on the reset cylinder 43, and the guide column 6 passes through the limiting hole 421 and is threadedly connected with the lower guide rod 44.

[0044] When driving the lower guide rod 44 to move towards the upper guide rod 32 to detect measuring instruments for micro-deformation with high precision requirements such as extensometers and dial indicators, the lower guide rod 44 drives the reset cylinder 43 to move synchronously. The guide cylinder 42 guides the reset cylinder 43, and the side wall of the limiting hole 421 guides the guide post 6, thereby guiding the movement of the reset cylinder 43 and the lower guide rod 44. At the same time, in cooperation with the inner wall of the guide cylinder 42 to guide the lower guide rod 44, the reset cylinder 43 and the lower guide rod 44 can only move towards the direction of aligning with the upper guide rod 32, effectively improving the accuracy and stability of the movement of the reset cylinder 43 and the lower guide rod 44.

[0045] Refer to Figure 1 、 Figure 3 As shown in FIGS. and, the driving assembly 45 is installed on the chassis 11. The driving assembly 45 is used to drive the lower guide rod 44 to move towards the upper guide rod 32. The driving assembly 45 includes a driving motor 451 and a driving rod 452. The driving motor 451 is installed on the base 1. The driving rod 452 is threadedly inserted through the guide cylinder 42. The driving rod 452 is coaxially connected to the output shaft of the driving motor 451. The driving rod 452 abuts against the lower guide rod 44. In this embodiment, the driving rod 452 includes a lead screw and an abutting sleeve. The lead screw is coaxially installed on the output shaft of the driving motor 451. The abutting sleeve is slidably installed on the guide cylinder 42 along the sliding direction of the lower guide rod 44. The lead screw is threadedly inserted through the abutting sleeve. The abutting sleeve abuts against the lower guide rod 44.

[0046] Start the driving motor 451. The output shaft of the driving motor 451 drives the lead screw to rotate. The lead screw can drive the abutting sleeve to move towards the direction close to the lower guide rod 44 and abut against the lower guide rod 44, and then drive the lower guide rod 44 to move towards the upper guide rod 32. Thus, the lower guide rod 44 is precisely driven by the driving motor 451. After the detection is completed, the reset cylinder 43 moves downward due to gravity to reset. The reset cylinder 43 drives the lower guide rod 44 to move downward for reset, so that the reset cylinder 43 and the lower guide rod 44 can be reset downward to the position where the guide post 6 abuts against the bottom wall of the limiting hole 421. During the whole process, the lower guide rod 44 moves stably and is evenly stressed, effectively improving the detection accuracy of measuring instruments for micro-deformation with high precision requirements such as extensometers and dial indicators.

[0047] Refer to Figure 1 、 Figure 4, The detection mechanism 5 is installed on the chassis 11. The detection mechanism 5 is used to detect the movement amount of the lower guide rod 44. The detection mechanism 5 includes a laser interferometer 51, an angle mirror 52, a linear mirror 53, and a control host 54. The laser interferometer 51 is installed on the chassis 11 and is used to emit and receive light. The angle mirror 52 is installed on the chassis 11 and is used to reflect the light emitted by the laser interferometer 51 and reflect the light to the receiving end of the laser interferometer 51. The linear mirror 53 is installed on the reset cylinder 43 and is used to receive and reflect the light reflected by the angle mirror 52 to the angle mirror 52. The control host 54 is installed on the chassis 11 and is electrically connected to the laser interferometer 51.

[0048] When the reset cylinder 43 is in the initial position, the laser interferometer 51 emits light to the reflecting mirror. The reflecting mirror reflects the light to the linear mirror 53. The linear mirror 53 then reflects the light to the angle mirror 52. The angle mirror 52 reflects the light to the receiving end of the laser interferometer 51 to obtain the optical path at the initial position. When the lower guide rod 44 moves upward to detect measuring instruments for micro-deformation with high precision requirements such as extensometers and micrometers, the lower guide rod 44 drives the reset cylinder 43 to move upward. The reset cylinder 43 drives the linear mirror 53 to move upward. The light emitted by the laser interferometer 51 to the reflecting mirror is reflected by the reflecting mirror to the linear mirror 53, and then reflected by the linear mirror 53 to the reflecting mirror. The reflecting mirror then reflects the light to the receiving end of the laser interferometer 51 to obtain the optical path at the maximum upward position of the lower guide rod 44. The laser interferometer 51 then transmits the optical path received by the receiving end of the laser interferometer 51 at the initial position of the linear mirror 53 and the optical path received by the receiving end of the laser interferometer 51 when the linear mirror 53 moves to the farthest distance along with the reset cylinder 43 to the control host 54. By the change of the two optical paths, the moving distance of the reset cylinder 43 can be obtained, and then the displacement of measuring instruments for micro-deformation with high precision requirements such as extensometers and micrometers can be obtained, and the measuring instruments for micro-deformation with high precision requirements such as extensometers and micrometers can be accurately calibrated.

[0049] Refer to Figure 1 , Figure 4 , An angle interference mirror group 7 is installed on the lower guide rod 44. The angle interference mirror group 7 is used to reflect the light reflected by the angle mirror 52 to the angle mirror 52. In this embodiment, the angle interference mirror group 7 includes a beam splitter and a reflecting mirror. A connecting piece is installed on the lower guide rod 44. An opening for the connecting piece to move up and down is formed on the side wall of the guiding cylinder 42. Both the beam splitter and the reflecting mirror are installed on the connecting piece. The beam splitter is used to reflect the light reflected by the angle mirror 52 to the reflecting mirror and reflect the light reflected by the reflecting mirror to the angle mirror 52. The reflecting mirror is used to reflect the light reflected by the beam splitter to the beam splitter.

[0050] When the reset cylinder 43 is in the initial position, the laser interferometer 51 emits light to the reflector, the reflector reflects the light to the beam splitter, the beam splitter reflects the light to the reflector, the reflector reflects the light to the angle mirror 52, and the angle mirror 52 reflects the light to the receiving end of the laser interferometer 51, obtaining the optical path of the initial position of the lower guide rod 44. After the lower guide rod 44 moves up to the maximum position, through the reflection of the angle mirror 52, the beam splitter and the reflector, the optical path of the lower guide rod 44 moving up to the maximum position is obtained again. By analyzing the change in the optical path received by the receiving end of the laser interferometer 51 at the initial position of the angle interferometer group 7 and the change in the optical path received by the receiving end of the laser interferometer 51 when the angle interferometer group 7 moves to the farthest distance along with the lower guide rod 44, the moving distance of the lower guide rod 44 can be obtained. Furthermore, the displacement of measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators can be measured from the movement of the lower guide rod 44, and compared with the measurement of the displacement of measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators from the movement of the reset cylinder 43, ensuring the accuracy of calibrating measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators.

[0051] The implementation principle of a calibrator in an embodiment of the present application is as follows: Adjust the positions of the upper cantilever 31 and the lower cantilever 41 to make the distance between the upper guide rod 32 and the lower guide rod 44 match measuring instruments with very high precision requirements for micro-deformation such as the extensometers and dial indicators to be detected. Then, install the measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators between the upper guide rod 32 and the lower guide rod 44. Start the drive motor 451, and the drive rod 452 drives the lower guide rod 44 to move up, causing the measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators to generate displacement. During the process, the light emitted by the laser interferometer 51 is reflected and then received by the receiving end of the laser interferometer 51. The optical path received by the receiving end of the laser interferometer 51 at the initial position of the linear mirror 53 and the optical path received by the receiving end of the laser interferometer 51 when the linear mirror 53 moves to the farthest distance along with the reset cylinder 43 are transmitted to the control host 54, and the change in the optical path received by the receiving end of the laser interferometer 51 at the initial position of the angle interferometer group 7 and the change in the optical path received by the receiving end of the laser interferometer 51 when the angle interferometer group 7 moves to the farthest distance along with the lower guide rod 44 are analyzed. Through the change in the two optical paths, the moving distance of the reset cylinder 43 can be obtained, and then the displacement of the measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators can be obtained, accurately calibrating the measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators. After the detection is completed, the drive motor 451 drives the drive rod 452 to reset, and the lower guide rod 44 moves and resets in the direction away from the upper clamping mechanism 3 under the gravity of the reset cylinder 43. During the whole process, the lower guide rod 44 moves stably and is evenly stressed, effectively improving the detection accuracy of measuring instruments with very high precision requirements for micro-deformation such as extensometers and dial indicators.

[0052] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A calibrator, characterized in that: It includes a base (1), a support rod (2), an upper clamping mechanism (3), a lower clamping mechanism (4) and a detection mechanism (5). The support rod (2) is arranged on the base (1). The upper clamping mechanism (3) is arranged on the support rod (2) and is used to support the measuring instrument. The lower clamping mechanism (4) is arranged on the support rod (2) and is used to drive the measuring instrument to move towards the upper clamping mechanism (3). The lower clamping mechanism (4) includes a lower cantilever (41), a guide cylinder (42), a reset cylinder (43), a lower guide rod (44) and a driving component (45). The lower cantilever (41) is arranged on the support rod (2). The guide cylinder (42) is arranged on the lower cantilever (41). The reset cylinder (43) is slidably sleeved on the outer wall of the guide cylinder (42). The lower guide rod (44) is arranged on the reset cylinder (43) and slidably penetrates through the guide cylinder (42). The driving component (45) is arranged on the base (1) and is used to drive the lower guide rod (44) to move towards the upper clamping mechanism (3). The detection mechanism (5) is arranged on the base (1) and is used to detect the moving amount of the lower clamping mechanism (4).

2. The calibrator according to claim 1, characterized in that: A limiting hole (421) is opened on the guide cylinder (42) along the direction towards the upper clamping mechanism (3). A guide post (6) is arranged on the reset cylinder (43). The guide post (6) passes through the limiting hole (421) and is connected to the lower guide rod (44).

3. A calibrator according to claim 1, characterized in that: The driving component (45) includes a driving motor (451) and a driving rod (452). The driving motor (451) is arranged on the base (1). The driving rod (452) is threadedly penetrated through the guide cylinder (42) and is coaxially connected to the output shaft of the driving motor (451). The driving rod (452) abuts against the lower guide rod (44).

4. A calibration instrument according to claim 1, wherein: The upper clamping mechanism (3) includes an upper cantilever (31), an upper guide rod (32), a locking component (33) and a positioning member (34). The upper cantilever (31) is slidably arranged on the support rod (2). The upper guide rod (32) is slidably penetrated through the upper cantilever (31) and is opposite to the lower guide rod (44). The locking component (33) is arranged on the upper cantilever (31) and is used to position the upper guide rod (32). The positioning member (34) is arranged on the upper cantilever (31) and is used to position the upper cantilever (31).

5. A calibrator according to claim 4, characterized in that: The locking component (33) includes a deformation sleeve (331) and a locking bolt (332). A clamping hole (311) is opened on the upper cantilever (31). The deformation sleeve (331) is arranged in the clamping hole (311). A deformation slit (3311) is opened on the deformation sleeve (331). The upper guide rod (32) is slidably penetrated through the deformation sleeve (331). A deformation slit (312) is opened on the upper cantilever (31) communicating with the clamping hole (311). The locking bolt (332) is threadedly arranged on the upper cantilever (31) on one side of the deformation slit (312) and is threadedly connected to the upper cantilever (31) on the other side of the deformation slit (312).

6. A calibrator according to claim 1, characterized in that: The detection mechanism (5) includes a laser interferometer (51), an angle mirror (52), a linear mirror (53) and a control host (54). The laser interferometer (51) is arranged on the base (1) and is used for emitting and receiving light. The angle mirror (52) is arranged on the base (1) and is used for reflecting the light emitted by the laser interferometer (51) and reflecting the light back to the laser interferometer (51). The linear mirror (53) is arranged on the reset cylinder (43) and is used for reflecting the light reflected by the angle mirror (52) back to the angle mirror (52). The control host (54) is arranged on the base (1) and is electrically connected to the laser interferometer (51).

7. A calibrator according to claim 6, characterized in that: An angle interference mirror group (7) for reflecting the light reflected by the angle mirror (52) back to the angle mirror (52) is arranged on the lower guide rod (44).

8. A calibrator according to claim 1, characterized in that: The base (1) includes a chassis (11), a level (12) and support feet (13). The level (12) is arranged on the chassis (11) and is used for detecting the levelness of the chassis (11). A plurality of support feet (13) are arranged on the chassis (11), and the heights of the plurality of support feet (13) are all adjustable.

9. A calibrator according to claim 8, characterized in that: A lifting component (8) for driving the chassis (11) to lift is arranged on the chassis (11). The lifting component (8) includes a jacking block (81), a wedge block (82), a support block (83) and a control member (84). The jacking block (81) is arranged on the chassis (11). The wedge block (82) is slidably arranged on the jacking block (81). The support block (83) is slidably arranged on the wedge block (82). The joint surface of the wedge block (82) and the support block (83) is inclined. The control member (84) is arranged on the chassis (11) and is used for driving the wedge block (82) to slide.

10. A calibrator according to claim 9, characterized in that: A telescopic rod (9) is arranged on the support block (83). The length of the telescopic rod (9) is telescopic, and the telescopic rod (9) is connected to the jacking block (81).

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