Non-magnetic beam size adjusting mechanism

Abstract

The utility model discloses a non-magnetic beam size adjusting mechanism which comprises a slit structure and a slit adjusting mechanism, the slit structure and the slit adjusting mechanism are installed on a high-voltage spectrometer front end interchange system, and the slit mechanism is installed above the slit structure and the slit adjusting mechanism. The influence on the magnetic field and the superconducting coil is zero; a non-magnetic ultrasonic motor is adopted as a driving mode, different from a traditional permanent magnet motor which needs to be driven through electromagnetic induction, the non-magnetic ultrasonic motor achieves motor driving through the piezoelectric ceramic principle, interference of a magnetic field to the motor can be avoided, and therefore it is guaranteed that equipment normally operates at high precision in the high-intensity magnetic field environment; and the straightness of the blade in the full-stroke motion is ensured through precise matching of the guide rail and the sliding block.

Description

Technical Field

[0001] The invention relates to the technical field of neutron scattering spectrometers, in particular to a non-magnetic beam flow size adjustment mechanism. Background Art

[0002] Neutron scattering spectrometer is a device used for neutron scattering experiments, mainly detecting the microstructure and movement of matter. High-pressure neutron diffraction spectrometer is a neutron powder diffraction spectrometer that integrates two working modes, diffraction and imaging, equipped with a relatively comprehensive special pressure environment equipment, and has high / low temperature and magnetic field environment, and has a certain degree of versatility. The four-knife diaphragm is a key optical component in the neutron spectrometer, which plays a role in coordinating the observation of different sample types to adjust the neutron beam size to match them. In addition, the high-pressure spectrometer also has a collimator at the front end of the sample environment with the front and rear four-knife diaphragms to achieve the switching between the first scattering chamber and the second scattering chamber.

[0003] At present, there are few designs for neutron beam size adjustment mechanisms, especially in the current beam adjustment technology, which usually uses a magnetic field to control the movement and size of the beam. However, there are some problems with using a magnetic field for beam adjustment. First, the magnetic field device is usually bulky, which increases the complexity of the beam adjustment system. Second, the magnetic field device has high energy consumption, which increases the operating cost of the beam adjustment system. Therefore, a high-precision non-magnetic beam size adjustment mechanism is needed to solve these problems. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a non-magnetic beam flow size adjustment mechanism and an installation and alignment method thereof.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a magnetic-free beam size adjustment mechanism, including a slit structure and a slit adjustment mechanism, the slit structure and the slit adjustment mechanism are installed on the front-end interchange system of a high-pressure spectrometer, the slit mechanism is installed above the slit structure and the slit adjustment mechanism, the slit structure includes an installation base plate and a support system, a control feedback system, a drive system, a blade and a shielding system; the drive system is installed on both sides of the installation base plate and the support system, the blade and the shielding system are installed at the end of the drive system, a target system is arranged below it, the target system is installed on both sides of the installation base plate and the support system, and a control feedback system is arranged above the blade and the shielding system.

[0006] The mounting base plate and the supporting system include a mounting base plate, a mounting vertical plate, and a guide rail slider assembly. The mounting base plate is connected to the slit structure and the slit adjustment mechanism, and the mounting vertical plate is mounted on the mounting base plate.

[0007] The guide rail slider assembly is installed on both sides of the installation vertical plate to play a supporting and guiding role.

[0008] The control feedback system comprises a grating system, a limit switch bracket, a zero position switch bracket, a limit switch and a zero position switch.

[0009] The guide rail slider assembly is a double guide rail structure consisting of two parallel distributed guide rail bodies, including a reference side guide rail and a driven side guide rail. The reference side guide rail and the driven side guide rail are installed in sequence from left to right and from top to bottom respectively, and a slider is installed on the guide rail slider assembly.

[0010] The mounting base plate is mounted on the slit structure and the slit adjustment mechanism. The mounting base plate is connected and fixed by positioning pins and screws. The mounting vertical plate is mounted on the mounting base plate. The mounting vertical plate and the mounting base plate are connected and fixed by screws. The mounting vertical plate provides a reference for the overall installation. The mounting vertical plate is provided with a finely machined surface as the installation reference surface of the guide rail in the guide rail slider assembly and the installation surface of the guide rail.

[0011] The driving system comprises a motor, a coupling and a lead screw. The motor is connected to the lead screw through the coupling and then installed on the mounting plate via a motor bracket and a bearing seat.

[0012] The motor bracket is installed on the mounting plate, and a motor is installed on the motor bracket. One side of the output shaft of the motor is fixedly connected to a moving plate via a connecting nut and a screw. The moving plate is connected to a lead screw via a nut and is installed on a guide rail slider assembly.

[0013] The moving plate is installed on the slider guide rail and fixed to the slider by screws. The moving plate provides the installation position of the blade and boron carbide. The moving plate also serves as a limit switch and a zero switch signal trigger. The limit switch bracket is installed on the upper part of the mounting plate, and the limit switch is installed on the limit switch bracket. The limit switch is a small mechanical limit switch and is located on both sides of the moving plate.

[0014] One end of the guide rail slider assembly is connected to the mounting vertical plate, and the other end is connected to the moving plate; the reference side guide rail is tightened by an eccentric positioning pin; and the reference side slider is tightened by a hexagon socket screw.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The entire set of equipment in the present invention uses non-magnetic materials, which have zero impact on magnetic fields and superconducting coils. The drive method uses a non-magnetic ultrasonic motor. Different from the traditional permanent magnet motor that needs to be driven by electromagnetic induction, the non-magnetic motor relies on the principle of piezoelectric ceramics to achieve motor drive, which can avoid the interference of the magnetic field on the motor, thereby ensuring the high-precision normal operation of the equipment in a strong magnetic field environment; more specifically, the materials are made of non-magnetic aluminum alloy and copper, partially 316LN stainless steel, and titanium alloy for screws. The overall magnetic permeability of the equipment is less than 1.05, and the equipment has little impact on the magnetic field equipment; the motor uses a non-magnetic ultrasonic motor, which can move normally with high precision in a strong magnetic field environment; the mounting surface of the main pipe on the mounting plate is processed with high precision as the installation reference for the guide rail, slider and moving plate, and the operation A high-precision mounting reference surface is processed on the movable plate to mount the blade. The mounting reference surface on the movable plate is vertical to the mounting reference surface of the guide tube on the mounting vertical plate with high precision. The straightness of the blade in the full stroke movement is ensured by the precise matching of the guide rail and the slider. The four surfaces of the inner opening of the blade and the front and back surfaces of the mounting vertical plate are measured in the present invention to establish a local area network coordinate system. Four or six target seats on the mounting vertical plate are measured under the coordinate system, and the position of the entire slit device in space is characterized by the coordinates of the six target seats in space. A laser tracker is used to align the four or six target seats on the device to the theoretical value in space, so that the device is installed at the theoretical position in space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of the present invention;

[0018] Figure 2 It is a side view structural schematic diagram of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the top structure of the present invention.

[0022] Numbers in the figure: 1, slit structure and slit adjustment mechanism; 2, installation base plate and support system; 3, drive system; 4, blade and shielding system; 5, target system; 6, control feedback system; 7, installation base plate; 8, installation vertical plate; 9, guide rail slider assembly; 10, slider; 11, motor bracket; 12, motor; 13, motion board; 14, limit switch bracket; 15, zero switch bracket; 16, limit switch; 17, zero switch; 18, grating ruler; 19, reading head; 20, blade; 21, boron carbide plate; 22, target seat; 23, third slit nut; 24. Adjustment base plate; 25. Horizontal adjustment plate; 26. Horizontal adjustment device; 27. M12 double-rod horizontal adjustment mechanism; 28. Elevation adjustment device; 29. ​​Elevation adjustment plate; 30. Spacer; 31. Horizontal adjustment fixing block; 32. Horizontal adjustment stud; 33. Horizontal adjustment nut; 34. M12 side plate; 35. M12 flange; 36. M12 push rod; 37. First nut; 38. M12 pull rod; 39. M12 nut; 40. Second nut; 41. Third nut; 42. Slit bolt; 43. First slit nut; 44. Second slit nut. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5The present invention provides a technical solution: a non-magnetic beam size adjustment mechanism, including a slit structure and a slit adjustment mechanism 1, the slit structure and the slit adjustment mechanism 1 are installed on the front-end interchange system of the high-pressure spectrometer, and the slit mechanism is installed above the slit structure and the slit adjustment mechanism 1. The slit structure includes an installation base plate and a support system 2, a control feedback system 6, a drive system 3, a blade and a shielding system 4, and the blade and the shielding system 4 include two horizontal blades and two vertical blades. The blade thickness is 5mm, and the material is sintered boron carbide, wherein the mass fraction of B4C is greater than 98%, and the blade edge is chamfered with 2mm on the beam inlet side, which can reduce neutron edge scattering and effectively reduce the background. The inner size of the rectangle formed by the four blade edges is the beam passing through. The opening size, the four blades are staggered in space, and can achieve zero gap and complete closure. Before installing the blade, the installation surface needs to be processed with high precision, and a high-precision cubic auxiliary installation block is built. The blade is installed with a laser tracker to assist in alignment, so that the parallelism of the two blades is less than 10μm, and the verticality of adjacent blades is less than 10μm. In addition, the whole set of equipment is made of non-magnetic materials, which has zero effect on the magnetic field and superconducting coils. The drive mode adopts non-magnetic ultrasonic motor. Different from the traditional permanent magnet motor that needs to be driven by electromagnetic induction, the non-magnetic motor relies on the piezoelectric ceramic principle to realize motor drive, which can avoid the interference of the magnetic field on the motor, thereby ensuring the high-precision normal operation of the equipment in a strong magnetic field environment;

[0025] A drive system 3 is installed on both sides of the installation base plate and support system 2, a blade and shielding system 4 is installed at the end of the drive system 3, a target system 5 is arranged below it, the target system 5 is installed on both sides of the installation base plate and support system 2, and a control feedback system 6 is arranged above the blade and shielding system 4. The installation base plate and support system 2 includes a mounting base plate 7, a mounting vertical plate 8, and a guide rail slider assembly 9. The mounting base plate 7 is connected to the slit structure and the slit adjustment mechanism 1, the mounting vertical plate 8 is installed on the mounting base plate 7, and the guide rail slider assembly 9 is installed on both sides of the mounting vertical plate 8 to play a supporting and guiding role. The control feedback system 6 includes a grating system, a limit switch bracket 1 4. Zero switch bracket 15, limit switch 16 and zero switch 17. The grating system is installed on the mounting plate 8 and the moving plate 13 to provide overall motion feedback. The limit switch 16 is installed on the mounting plate 8 to provide over-travel protection. The zero switch 17 is installed on the mounting plate 8 to facilitate the replacement of the encoder. The control feedback system 6 cooperates with the motor drive system to achieve high-precision positioning of the blade 20. The zero switch bracket 15 is installed on the upper part of the mounting plate 8, and the zero switch 17 is installed on the zero switch bracket 15. The zero switch 17 is a high-precision mechanical touch switch with a positioning accuracy of less than 5 microns and is located on one side of the moving plate 13.

[0026] The mounting base plate 7 is mounted on the slit structure and the slit adjustment mechanism 1, and a mounting vertical plate 8 is mounted on the top thereof. Guide rail slider assemblies 9 are mounted on both sides of the mounting vertical plate 8. The guide rail slider assembly 9 is a double guide rail structure composed of two parallel guide rail bodies, including a reference side guide rail and a driven side guide rail. The reference side guide rail and the driven side guide rail are respectively installed in order from left to right and from top to bottom. A slider 10 is mounted on the guide rail slider assembly 9. The mounting base plate 7 is mounted on the slit structure and the slit adjustment mechanism 1. The mounting base plate 7 is connected and fixed by positioning pins and screws. The mounting vertical plate 8 is mounted on the mounting base plate 7. The mounting vertical plate 8 and the mounting base plate 7 are connected and fixed by screws. The mounting vertical plate 8 provides a reference for the overall installation. The mounting vertical plate 8 is provided with a finely machined surface as the installation reference surface of the guide rail in the guide rail slider assembly 9 and the installation surface of the guide rail;

[0027] The driving system 3 includes a motor 12, a coupling and a screw. The motor 12 is connected to the screw through a coupling, and then installed on the mounting plate 8 through a motor bracket 11 and a bearing seat. The motor bracket 11 is installed on the mounting plate 8, and the motor 12 is installed on the motor bracket 11. One side of the output shaft of the motor 12 is fixedly connected to a moving plate 13 through a connecting nut and a screw. The moving plate 13 is connected to the screw through a nut and installed on the guide rail slider assembly 9. The moving plate 13 is installed on the slider guide rail and fixed to the slider 10 by screws. The moving plate 13 provides the installation position of the blade 20 and the boron carbide. The moving plate 13 also serves as a signal trigger for the limit switch 16 and the zero switch 17. The limit switch bracket 14 is installed on the upper part of the mounting plate 8, and the limit switch 16 is installed on the limit switch bracket 14. The limit switch 16 is Small mechanical limit switches are provided on both sides of the moving plate 13. One end of the guide rail slider assembly 9 is connected to the mounting plate 8, and the other end is connected to the moving plate 13. The reference side guide rail is clamped with an eccentric positioning pin; the reference side slider 10 is clamped with a hexagon socket screw. In the guide rail slider assembly 9, four sliders 10 are required for a single guide rail, and the friction coefficient is 0.02. A grating system is provided on the moving plate 13. The grating system includes a grating ruler 18 and a reading head 19. The grating ruler 18 is installed on the mounting plate 8, and the reading head 19 is fixedly installed on the side of the moving plate 13. The grating system, the limit switch 16 and the zero switch 17 are respectively connected to the controller. The grating ruler 18 adopts an absolute grating ruler. The grating ruler 18 is pasted on the mounting plate 8, and the reading head 19 is fixed on the moving plate 13. The movement stroke of a single blade 20 is greater than 31mm.

[0028] There are four sets of blades and shielding system 4, each set includes blades 20 and boron carbide plates 21, the blades 20 are fixedly installed on the inner side of the moving plate 13 by screws, the boron carbide plates 21 are installed on the outer side of the moving plate 13 by screws, the blades 20 are fixed on the inner side of the moving plate 13 by screws, the blades 20 are boron carbide sheet structures, and are spatially staggered, the boron carbide plates 21 are boron-containing rubber, the thickness of the boron-containing rubber is 5mm, the mass fraction of boron carbide is greater than 70%, and it plays a role in shielding reinforcement, the boron-containing rubber is attached to the outer surface of the four-blade slits to cover all the outer surfaces of the four-blade slits, the sintered boron carbide absorbs the excess neutron beam outside the beam opening, and protects the internal components, the rectangular frame composed of four blades 20 cooperates with the external boron carbide plates 21 to control the size of the neutron beam entering the optical element; each blade 20 is directly fixed on its own moving plate 13 by screws;

[0029] The target system 5 includes a target seat 22, which is installed on both sides of the mounting plate 8. The target seat 22 is suitable for a measuring ball with a size of 0.875 inches. The assembly method of the slit structure and the slit adjustment mechanism 1 mainly includes the following steps:

[0030] S1. Install the guide rail: The reference side guide rail is in close contact with the installation reference surface of the installation vertical plate 8 and the screws are tightened in sequence from the middle to both ends; the driven side guide rail is made parallel to the transverse reference surface of the reference side guide rail through a micrometer, and the screws are tightened in sequence;

[0031] S2, install the moving plate 13 and the slider 10: the reference side slider 10 is in close contact with the installation reference surface of the moving plate 13 and the screws are tightened in sequence; the driven side slider 10 is installed on the guide rail; the moving plate 13 and the slider 10 are installed on the guide rail, and the screws are tightened when the operation is smooth;

[0032] S4, install the limit switch 16, the zero switch 17, the grating system and the base plate;

[0033] S5, installing the blades 20: first define and install one of them as the reference blade 20, the reference blade 20 is installed on the reference surface of the moving plate 13, and the other blades 20 are installed respectively based on the reference blade 20, and debug and calibrate the parallelism between the relative blades 20, the verticality between the adjacent blades 20, the parallelism between the reference blade 20 and the mounting vertical plate 8, and the movement straightness of the blades 20 on their respective support rails;

[0034] S6. Install the motor assembly: The motor assembly should be installed in accordance with the matching standard between the motor assembly and the motion board 13; when installing the motor 12, the effect of the coaxiality on the operation of the motor 12 should be considered;

[0035] S7. Install the target seat 22: The target seat 22 is selected to have a size of 0.875 inches. When the target seats 22 are arranged, six target seats 22 should be observed simultaneously in the same line of sight.

[0036] The slit structure and slit adjustment mechanism 1 include an adjustment base plate 24, which is installed on the workbench of the high-pressure spectrometer front-end interchange system by screws, and a horizontal adjustment plate 25 is installed on the adjustment base plate 24 by screws, a horizontal adjustment device 26 is fixedly installed on one end of the top of the adjustment base plate 24 by screws, and the other end of the horizontal adjustment device 26 is directly in contact with the horizontal adjustment plate 25 by screws, and an M12 double-rod horizontal adjustment mechanism 27 is fixedly installed on one end of the adjustment base plate 24 by screws, and the other end of the M12 double-rod horizontal adjustment mechanism 27 is fixed on the horizontal adjustment plate 25 by screws, and the horizontal adjustment plate 25 is fixed by screws. The elevation adjustment device 28 is fixedly installed by threaded cooperation, one end of the elevation adjustment device 28 is directly in contact with the adjustment base plate 24, and is fixedly installed on the horizontal adjustment plate 25 by threaded cooperation. A pad 30 is installed on the elevation adjustment plate 29. The horizontal adjustment device 26 includes a horizontal adjustment fixing block 31, which is fixedly installed on the adjustment base plate 24 by screws, and a horizontal adjustment stud 32 is threadedly connected to the horizontal adjustment fixing block 31, and a horizontal adjustment nut 33 is threadedly connected to the horizontal adjustment stud 32. The horizontal adjustment nut 33 is close to the horizontal adjustment fixing block 31, and the M12 double-rod horizontal adjustment mechanism 27 includes an M12 side plate 34 and an M12 flange 35, the M12 side plate 34 is fixedly mounted on the adjustment base plate 24 by screws, and an M12 push rod 36 is threadedly connected to the M12 side plate 34, and a first nut 37 is threadedly connected to the M12 push rod 36, and the first nut 37 is close to the M12 side plate 34, the M12 flange 35 is fixedly mounted on the horizontal adjustment plate 25 by screws, and an M12 pull rod 38 is threadedly connected to the M12 flange 35, and an M12 nut 39, a second nut 40 and a third nut 41 are respectively threadedly connected to the M12 pull rod 38, and the M12 nut 39 is close to the M12 side plate 34 The second nut 40 is close to the M12 nut 39, the third nut 41 is close to the M12 flange 35, the elevation adjustment device 28 includes a slit bolt 42, the slit bolt 42 is threadedly connected to the elevation adjustment plate 29 and the horizontal adjustment plate 25, and one end of the slit bolt 42 is close to the adjustment base plate 24, and the first slit nut 43, the second slit nut 44 and the third slit nut 23 are threadedly connected to the slit bolt 42 respectively, the first slit nut 43 is close to the upper surface of the elevation adjustment plate 29, the second slit nut 44 is close to the lower surface of the elevation adjustment plate 29, and the third slit nut 23 is close to the upper surface of the horizontal adjustment plate 25.

[0037] The installation and alignment method of the non-magnetic beam flow size adjustment mechanism comprises the following steps:

[0038] S1: Process non-standard parts with set processing accuracy;

[0039] S2: Assemble non-standard parts and standard parts under the set assembly accuracy and assembly requirements of standard parts, specifically including the following steps:

[0040] S21: First, the guide rail slider assembly 9 is installed according to the installation requirements of the guide rail slider assembly 9, and after installation, the parallelism of the guide rail slider assembly 9 and the verticality between the guide rail slider assembly 9 and the installation reference plane of the neutron beam size adjustment mechanism are measured, which specifically includes the following steps:

[0041] S211: The reference side guide rail is in close contact with the mounting reference surface of the mounting vertical plate 8 and the screws are tightened in sequence;

[0042] S212: Use a micrometer to make the driven side guide rail parallel to the transverse reference plane of the reference side guide rail, and tighten the screws in sequence;

[0043] S213: Use a three-coordinate measuring machine to measure the parallelism of the guide rail slider assembly 9 and the verticality between the guide rail slider assembly 9 and the installation reference surface of the neutron beam size adjustment mechanism, and confirm that they are within the installation error range;

[0044] S22: Install the slider 10 on the moving plate 13 and install it as a whole on the guide rail slider assembly 9, and measure the parallelism relative to the moving plate 13 at full stroke, half stroke and fully closed after the installation is completed, which specifically includes the following steps:

[0045] S221: The reference side slider 10 is in close contact with the installation reference surface of the moving plate 13 and the screws are tightened in sequence;

[0046] S222: The driven side slider 10 is mounted on the moving plate 13 and screwed in, leaving adjustment space for the driven side slider 10;

[0047] S223: Install the moving plate 13 and the slider 10 onto the guide rail slider assembly 9, and tighten the driven side slider screws when the operation is smooth;

[0048] S224: Use a three-coordinate measuring machine to measure the parallelism of the relative motion plate 13 at full stroke, half stroke and fully closed, and confirm that it is within the error range;

[0049] S23: According to the position of the threaded hole, the boron carbide plate 21, the zero switch 17, the limit switch 16, the reading head 19 are installed, and the grating ruler 18 is posted, which specifically includes the following steps:

[0050] S231: Install the boron carbide plate 21 according to the threaded holes on the moving plate 13;

[0051] S232: Install the limit switch 16 and the limit switch bracket 14 according to the threaded holes on the mounting plate 8;

[0052] S233: Install the zero position switch 17 and the zero position switch bracket 15 according to the threaded holes on the mounting plate 8;

[0053] S234: Place the mounting surface of the mounting vertical plate 8 and the mounting surface in the groove of the mounting bottom plate 7 close to each other, and tighten the screws in sequence;

[0054] S235: Post the grating ruler 18 according to the groove of the mounting plate 8, and install the reading head 19 according to the threaded hole of the moving plate 13, and tighten the screws, leaving space for adjusting the position and posture of the reading head 19, and adjust the position and posture of the reading head 19 until the indicator light on the reading head 19 turns green or blue;

[0055] S24: Install the blade 20 according to the installation sequence and requirements of the blade 20, specifically including the following steps:

[0056] S241: First, install the standard blade 20, align one side of the standard blade 20 with the installation reference surface of the standard blade 20, and then use a three-dimensional coordinate measuring machine to ensure that the parallelism between the three sides of the standard blade 20 and the installation reference surface of the guide rail slider assembly 9 on the side of the standard blade 20 is less than 10 μm;

[0057] S242: Then install the other three blades 20 according to the standard blade 20, and the specific installation is as follows:

[0058] 1) The error of the rectangle formed by the three sides of the blades 20①, ②, ③, and ④ of the neutron beam size adjustment mechanism under full stroke does not exceed 15μm;

[0059] 2) The parallelism between the three faces of the blades 20 ① and ②, ③ and ④ of the neutron beam size adjustment mechanism is less than 10 μm;

[0060] 3) The verticality of the blades 20 ①, ② and ③, ④ of the neutron beam size adjustment mechanism is less than 10 μm;

[0061] 4) The parallelism between the three surfaces of the blades 20 ①, ②, ③, and ④ of the neutron beam size adjustment mechanism and the reference plane of the mounting base plate 7 is less than 10 μm;

[0062] 5) The linearity of the movement of the guide rail slider assembly 9 supported by the blades 20①, ②, ③, ④ of the neutron beam size adjustment mechanism is less than 5μm;

[0063] S25: Install the motor 12 and the motor bracket 11, and assemble the control feedback system 6 after installation, and the equipment assembly is completed;

[0064] The following is the calibration and alignment installation of the equipment.

[0065] S3: Calibration refers to characterizing the position of the device in three-dimensional space through a number of target seats 22. The basic method is: first, the slit opening is set to the maximum size through the electric system;

[0066] Secondly, measure the inner dimension end faces of the four blades 20 and the front and rear end faces of the mounting plate 8. By measuring the remaining reference surfaces, establish a local area network coordinate system with the center point of the slit as the origin;

[0067] Again, the target seat 22 on the slit is measured in the local area network coordinate system to obtain the three-dimensional coordinates of the target seat 22 in the local area network coordinate system;

[0068] Finally, since the position of the local area network coordinate system under the global coordinate system is known, the three-dimensional coordinates of the target seat 22 on the slit under the global coordinate system are obtained through coordinate conversion;

[0069] Finally, a laser tracker is used in conjunction with a bottom adjustment system to adjust the target seat 22 to a theoretical position in space, thereby positioning the entire four-blade slit at the theoretical position in space.

[0070] The measuring arm is used to measure the reference plane of the neutron beam size adjustment mechanism that has been set, and a local coordinate system is established. Based on this, the local coordinates of the target point of the neutron beam size adjustment mechanism are obtained and converted into global coordinates, which are the theoretical coordinate values ​​of the target point. Specifically, the following steps are included:

[0071] S31: Using the measuring arm to establish a local coordinate system for the neutron beam size adjustment mechanism, specifically comprising the following steps:

[0072] S311: Using the measuring arm to measure the three surfaces of the blades 20①, ②, ③, and ④ of the neutron beam size adjustment mechanism, the plane information of the three surfaces of the blades 20①, ② can be obtained by measuring the three surfaces of the blades 20①, ②, and the YOZ plane can be obtained by taking the center plane of the three surfaces of the blades 20①, ②;

[0073] S312: By measuring the three surfaces of the blades 20③ and ④ of the neutron beam size adjustment mechanism, the plane information of the three surfaces of the blades 20③ and ④ can be obtained, and by taking the center plane of the three surfaces of the blades 20③ and ④, the XOY plane can be obtained;

[0074] S313: By measuring the four sides of the blades 20② and ④ of the neutron beam size adjustment mechanism, the plane information of the four sides of the blades 20② and ④ can be obtained, and by taking the center plane of the planes of the four sides of the blades 20② and ④, the XOZ plane can be obtained;

[0075] S314: The intersection of the three planes (YOZ plane, XOY plane and XOZ plane) is the origin of the local coordinate system, and the intersection lines of the two planes are the coordinate axes of the coordinate system, namely, the X axis, the Y axis and the Z axis;

[0076] S32: in the local coordinate system, using the measuring arm to obtain the local coordinate value of the target point of the neutron beam size adjustment mechanism;

[0077] S33: through the positional relationships of the target station spectrometer and the position of the neutron beam size adjustment mechanism in the spectrometer, the local coordinate system can be converted into a global coordinate system to obtain the theoretical global coordinates of the target point where the neutron beam size adjustment mechanism is installed;

[0078] S4: using a laser tracker to obtain a global coordinate system, and obtaining the actual global coordinate point of the target point of the neutron beam size adjustment mechanism. The actual coordinate of the target point of the neutron beam size adjustment mechanism overlaps with the theoretical coordinate (that is, the actual error value is less than the set error), indicating that the neutron beam size adjustment mechanism is aligned in place, specifically comprising the following steps:

[0079] S41: scanning a key target point set on the target station spectrometer by a laser tracker to obtain a global coordinate system of the entire target station spectrometer, and scanning a target point installed on the neutron beam size adjustment mechanism by the laser tracker to obtain the actual coordinate of the target point installed on the neutron beam size adjustment mechanism in the global coordinate system;

[0080] S42: Through the slit structure and the slit adjustment mechanism 1, the actual global coordinates of the target ball are made to coincide with the theoretical global coordinates (that is, the actual error value is less than the set error), which means that the neutron beam size adjustment mechanism is aligned and installed in place, which specifically includes the following steps:

[0081] S421: First, the target ball is magnetically attracted to a target seat 22;

[0082] S422: Then, the spatial position and posture of the neutron beam size adjustment mechanism are adjusted by using the above-mentioned slit structure and the horizontal adjustment device 26, the elevation adjustment device 28 of the slit adjustment mechanism 1 and the M12 double-rod horizontal adjustment mechanism 27, so that the actual spatial point coordinates of the target ball installed in the neutron beam size adjustment mechanism coincide with the theoretical coordinates converted from the coordinates during calibration (i.e., the actual error is less than the theoretical error);

[0083] S423: The target ball is magnetically attracted to other target seats 22 under the same viewing angle in sequence, and is adjusted according to the above adjustment method until the above requirements are met, which means that the alignment installation is completed.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-magnetic beam flow size adjustment mechanism, comprising a slit structure and a slit adjustment mechanism (1), characterized in that: The slit structure and the slit adjustment mechanism (1) are installed on the front-end interchange system of the high-pressure spectrometer. The slit mechanism is installed above the slit structure and the slit adjustment mechanism (1). The slit structure comprises an installation base plate and a support system (2), a control feedback system (6), a drive system (3), a blade and a shielding system (4); the drive system (3) is installed on both sides of the installation base plate and the support system (2), the blade and the shielding system (4) are installed at the end of the drive system (3), and a target system (5) is arranged below the drive system (3). The target system (5) is installed on both sides of the installation base plate and the support system (2), and the control feedback system (6) is arranged above the blade and the shielding system (4).

2. The non-magnetic beam flow size adjustment mechanism according to claim 1, characterized in that: The mounting base plate and support system (2) comprises a mounting base plate (7), a mounting vertical plate (8), and a guide rail slider assembly (9); the mounting base plate (7) is connected to the slit structure and the slit adjustment mechanism (1); and the mounting vertical plate (8) is mounted on the mounting base plate (7).

3. The non-magnetic beam flow size adjustment mechanism according to claim 2, characterized in that: The guide rail slider assembly (9) is installed on both sides of the installation vertical plate (8) to play a supporting and guiding role.

4. The non-magnetic beam flow size adjustment mechanism according to claim 1, characterized in that: The control feedback system (6) comprises a grating system, a limit switch bracket (14), a zero position switch bracket (15), a limit switch (16) and a zero position switch (17).

5. The non-magnetic beam flow size adjustment mechanism according to claim 2 or 3, characterized in that: The guide rail slider assembly (9) is a double guide rail structure consisting of two parallel distributed guide rail bodies, including a reference side guide rail and a driven side guide rail. The reference side guide rail and the driven side guide rail are respectively installed in sequence from left to right and from top to bottom. A slider (10) is installed on the guide rail slider assembly (9).

6. The non-magnetic beam flow size adjustment mechanism according to claim 2, characterized in that: The mounting base plate (7) is mounted on the slit structure and the slit adjustment mechanism (1). The mounting base plate (7) is connected and fixed by positioning pins and screws. The mounting vertical plate (8) is mounted on the mounting base plate (7). The mounting vertical plate (8) and the mounting base plate (7) are connected and fixed by screws. The mounting vertical plate (8) provides a reference for overall installation. The mounting vertical plate (8) is provided with a finely machined surface as a mounting reference surface of the guide rail in the guide rail slider assembly (9) and a mounting surface of the guide rail.

7. The non-magnetic beam flow size adjustment mechanism according to claim 1, characterized in that: The driving system (3) comprises a motor (12), a coupling and a screw rod. The motor (12) is connected to the screw rod via the coupling and then mounted on the mounting plate (8) via a motor bracket (11) and a bearing seat.

8. The non-magnetic beam flow size adjustment mechanism according to claim 7, characterized in that: The motor bracket (11) is mounted on the mounting vertical plate (8), and a motor (12) is mounted on the motor bracket (11); one side of the output shaft of the motor (12) is fixedly connected to a moving plate (13) via a connecting nut and a screw; the moving plate (13) is connected to a lead screw via a nut and is mounted on a guide rail slider assembly (9).

9. The non-magnetic beam flow size adjustment mechanism according to claim 8, characterized in that: The moving plate (13) is installed on the slider guide rail and fixed on the slider (10) by screws. The moving plate (13) provides installation positions for the blade (20) and the boron carbide. The moving plate (13) also serves as a trigger for the limit switch (16) and the zero switch (17) signal. The limit switch bracket (14) is installed on the upper part of the mounting plate (8), and the limit switch (16) is installed on the limit switch bracket (14). The limit switch (16) is a small mechanical limit switch and is located on both sides of the moving plate (13).

10. The non-magnetic beam flow size adjustment mechanism according to claim 5, characterized in that: One end of the guide rail slider assembly (9) is connected to the mounting vertical plate (8), and the other end is connected to the moving plate (13); the reference side guide rail is pressed by an eccentric positioning pin; and the reference side slider (10) is pressed by a hexagon socket screw.

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