Wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system

Abstract

The invention discloses a wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system, and relates to the technical field of physical property measurement, the wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system comprises a hollow sample rod and a supporting frame, the supporting frame is provided with a temperature sensor, and the wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system further comprises a sample holder, a first rotating mechanism, a first driving mechanism, a second driving mechanism and a reset component, through cooperation of the first rotating mechanism, the first driving mechanism, the second driving mechanism and the like, a pull rope transmission mode is adopted, and compared with a gear transmission mode in the prior art, on the one hand, the cooling capacity leakage speed is reduced, and the accuracy of detection data is improved; secondly, the cable arrangement mode is simple, and the wiring difficulty in the prior art is reduced; thirdly, the problems that in the prior art, a cable is prone to rotating along with the hollow sample rod, poor contact is prone to occurring, the cable is abraded, and the service life of equipment is short are solved; fourthly, compared with gear drive, the pull rope drive is small in return stroke difference, and the measurement precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of physical property measurement, and in particular relates to a cantilever beam testing magnetic moment system with multiple degrees of freedom in a wide temperature range. Background Art

[0002] In the process of research and development of new materials, physical property measurement is an indispensable link. Through accurate measurement of material properties, we can understand the performance characteristics of materials and provide a basis for material optimization and application. When measuring physical properties, samples are often placed in a low-temperature strong magnetic environment to measure the magnetic properties of materials.

[0003] The Chinese patent with publication number CN217180667U discloses a dual-axis rotating low-temperature sample rod, which includes: a connecting rod and a sample holder at the lower end of the connecting rod, the top of the connecting rod is provided with a motor drive motor for driving the sample to rotate; the sample holder includes a fixed frame, the fixed frame is provided with a first rotating unit and a second rotating unit, the first rotating unit can complete the vertical rotation of the sample, and the second rotating unit can complete the horizontal rotation of the sample. The above invention adopts a combination of multiple sets of gears and a rotary displacement stage to achieve high-precision two-axis rotation of low-dimensional magnetic materials with variable temperature and temperature control between 1.6K and 400K and in a strong magnetic field environment, that is, the sample's rotation axis direction is horizontal and longitudinal, wherein the horizontal direction relies on the motor drive motor and the longitudinal direction relies on the rotary displacement stage; the fixed retaining spring design that always maintains elastic force effectively solves the rotation backlash generated when the electric control gear rotates in the opposite direction.

[0004] Although the above patent can effectively solve the problem of rotational backlash generated when the electronically controlled gear rotates in the opposite direction, since the measurement is performed in a low temperature environment and a strong magnetic environment, the above patent directly uses an ordinary motor and gear drive to drive the sample holder to rotate, and the thermal conductivity of the gear transmission is relatively high, resulting in cold leakage. At the same time, the gear drive is directly used to drive the sample holder to rotate. Since data transmission is required during the detection process, cables need to be arranged inside the connecting rod. The above patent directly uses an ordinary motor and gear drive to drive the sample holder to rotate, which increases the difficulty of wiring. At the same time, the cable is easy to follow the rotation of the connecting rod, resulting in cable wear and poor contact.

[0005] Therefore, it is necessary to invent a cantilever beam testing magnetic moment system with multiple degrees of freedom in a wide temperature range to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range, comprising a hollow sample rod and a support frame, wherein a temperature sensor is provided on the support frame, and further comprising: A sample holder is placed in a support frame, and a cantilever capacitive magnetic moment sensor is arranged on the top of the sample holder. The cantilever capacitive magnetic moment sensor comprises a support frame, a cantilever is arranged on the top of the support frame, an insulating substrate is arranged on the bottom of the support frame, an upper capacitor plate is arranged on the bottom of the cantilever, and a lower capacitor plate is arranged on the top of the insulating substrate; A first rotating mechanism, which is rotatably connected to the support frame and driven by a first driving mechanism, and an angle sensor is provided between the first rotating mechanism and the support frame, so as to enable the sample holder to rotate in a first degree of freedom direction; A second driving mechanism, which is disposed in the middle of the first rotating mechanism and is connected to the sample holder, and is capable of rotating the sample holder in a second degree of freedom direction; a reset component, which is placed in a support frame at the bottom of the first rotating mechanism and is transmission-connected to the first rotating mechanism, and is used to reset the first rotating mechanism; The first driving mechanism includes a protective cover and a first wire wheel sleeved on the outer side wall of the first rotating mechanism. The protective cover is sleeved on the top of the hollow sample rod. A second wire wheel driven by an outer rotor motor is rotatably arranged inside the protective cover. The first wire wheel and the second wire wheel are connected by a pull rope.

[0008] Preferably, the first rotating mechanism comprises two rotating shafts rotatably connected to the support frame; The connecting frame is placed between the two rotating shafts and connected to the two rotating shafts.

[0009] Preferably, the second driving mechanism is a micro motor, and the micro motor is a stepping motor, a servo motor or a piezoelectric motor.

[0010] Preferably, the reset component comprises a reset shaft, both ends of which are rotatably connected to the inner side wall of the support frame; Two third wire wheels connected by a pull rope transmission, which are distributed up and down, and are respectively sleeved on the reset shaft and the peripheral side wall of the first rotating mechanism; The reset torsion member has one end connected to the side wall of the third wire wheel on the reset shaft, and the other end connected to the support frame.

[0011] Preferably, it also includes a box body, which is sleeved outside the support frame and has a temperature control mechanism and a magnetic field adjustment mechanism inside; A sleeve, which is sleeved outside the hollow sample rod, with a top connected to the first driving mechanism and a bottom connected to the box; The gas washing system includes a first solenoid valve, which is disposed on the top side wall of the sleeve and one end of which is connected to the interior of the sleeve; A second solenoid valve is disposed on the bottom side wall of the sleeve and one end of the second solenoid valve is connected to the interior of the sleeve; A third solenoid valve, one end of which is connected to the other end of the first solenoid valve and the other end of the second solenoid valve through the first conduit, and the other end of which is connected to a vacuum pump; The helium inflation device is connected with the first conduit through the electromagnetic inflation valve and the second conduit.

[0012] Preferably, the first driving mechanism further comprises a first planetary gear reduction mechanism, the input shaft of which is drivingly connected to the output shaft of the outer rotor motor; The second planetary gear reduction mechanism has an input shaft drivingly connected to the output shaft of the first planetary gear reduction mechanism through a transmission sleeve, and an output shaft drivingly connected to the second wire wheel.

[0013] Preferably, it also includes a rope protection mechanism, which includes a "U"-shaped frame fixedly connected to the inner arm of the protective cover; a group of rope guide wheels are provided at both ends, and each group of rope guide wheels has two rope guide wheels, and a rope guide wheel is connected in the middle through a spring telescopic cylinder and a bracket.

[0014] Preferably, the transmission sleeve is connected to the first planetary gear reduction mechanism through an elastic reset member, and the inner wall of the top end is slidably sleeved up and down with the output shaft of the first planetary gear reduction mechanism through a spline; the middle part rotates and slides in the input shaft of the second planetary gear reduction mechanism, and the outer wall of the other end is slidably sleeved with the inner wall of the output shaft of the second planetary gear reduction mechanism through a spline, the side wall of the middle part is provided with teeth, and the inner wall of the output shaft of the second planetary gear reduction mechanism is provided with tooth grooves matching the teeth, and the output shaft of the second planetary gear reduction mechanism is provided with a rotating groove rotatably connected to the spline at the bottom of the transmission sleeve.

[0015] Preferably, it also includes a tapered sleeve, which is sleeved on the top of the transmission sleeve; An "L"-shaped connecting rod, one end of which is connected to the free end of the spring telescopic cylinder, and the other end of which is in contact with the inclined surface of the conical sleeve, an elastic deformation part is provided in the middle of the horizontal section, and an inclined plate is provided on the side wall of the middle of the horizontal section; An electric telescopic rod is placed on top of the tilting piece.

[0016] Preferably, it further comprises a brake assembly, wherein the brake assembly comprises a brake disc disposed on top of the second wire wheel; A friction plate connected to the bottom of the second planetary gear reduction mechanism housing through a return spring; A linkage member, one end of which is placed on the top of the friction plate, the other end of which is located between the tilting plate and the electric telescopic rod, and the other end of which is provided with an elastic tilting portion that cooperates with the electric telescopic rod; The side wall around the free end of the electric telescopic rod is provided with an avoidance groove for avoiding the elastic inclined part.

[0017] Technical effects and advantages of the present invention: The present invention cooperates with a first rotating mechanism, a first driving mechanism, and a second driving mechanism. On the one hand, the present invention adopts a pull rope transmission method, which reduces the cold leakage rate compared to the gear transmission method in the prior art, so that the temperature at the sample holder tends to be stable, thereby improving the accuracy of the detection data; on the second hand, the present invention adopts a pull rope transmission method, which simplifies the cable arrangement method and reduces the wiring difficulty in the prior art compared to the gear transmission method in the prior art; on the third hand, it avoids the problem of poor contact caused by the cable easily following the rotation of the hollow sample rod in the prior art, as well as the problem of cable wear and short service life of the equipment. On the fourth hand, the pull rope drive has a smaller return difference than the gear drive in the prior art.

[0018] The present invention cooperates between the first rotating mechanism, the first driving mechanism and the second driving mechanism, and adjusts the first driving mechanism so that the rotation angle of the first rotating mechanism can be adjusted coarsely and finely, thereby avoiding the problem of inaccurate detection data caused by coarse adjustment.

[0019] 3. The present invention cooperates between the first rotating mechanism, the first driving mechanism and the second driving mechanism. During the coarse adjustment process, when the pull rope passing through the support frame is stuck with the support frame, the pull rope is tightened to move the spring telescopic cylinder to the side of the second wire wheel. The extension of the telescopic end of the spring telescopic cylinder will push the "L"-shaped connecting rod to the right. The right movement of the "L"-shaped connecting rod will push the tapered sleeve downward. The downward movement of the tapered sleeve will push the transmission sleeve downward, so that the transmission sleeve slides downward from the initial position, thereby reducing the transmission ratio. By reducing the transmission ratio, the rotation speed of the second wire wheel is reduced, and sufficient actuator reaction time is given, thereby avoiding the problem of failure to timely control the second wire wheel to stop rotating when the pressure value detected by the pressure sensor is greater than the preset value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the structural connection between the first driving mechanism, the support frame, the hollow sample rod and the sleeve of the present invention.

[0022] Figure 3 For the present invention Figure 2 Exploded diagram of structural parts.

[0023] Figure 4 It is a schematic diagram of the internal structure of the support frame of the present invention.

[0024] Figure 5 It is a schematic diagram of the cantilever beam capacitive magnetic moment sensor of the present invention.

[0025] Figure 6This is a top view of the sample holder of the present invention.

[0026] Figure 7 It is a schematic diagram of the internal structure of the protective cover of the present invention.

[0027] Figure 8 It is an exploded view of the outer rotor motor, the first planetary gear reduction mechanism, the transmission sleeve and the hollow sample rod parts of the present invention.

[0028] Fig. 9 It is a cross-sectional view of the second planetary gear reduction mechanism of the present invention.

[0029] Fig.10 This is an exploded view of the parts of the second planetary gear reduction mechanism of the present invention.

[0030] Fig.11 It is a schematic diagram of the structural connection between the transmission sleeve of the present invention and the input shaft in the second planetary gear reduction mechanism and the output shaft of the second planetary gear reduction mechanism when the transmission sleeve is in the initial position.

[0031] Fig.12 It is a schematic diagram of the structural connection between the transmission sleeve and the input shaft in the second planetary gear reduction mechanism and the output shaft of the second planetary gear reduction mechanism when the transmission sleeve is located at the fine adjustment position of the present invention.

[0032] Fig.13 It is a schematic diagram of the structural connection between the pull rope protection mechanism, the conical sleeve, the "L"-shaped connecting rod, the electric telescopic rod and the brake assembly of the present invention.

[0033] Fig.14 For the present invention Fig.13 Three-dimensional schematic diagram of the structure from another angle.

[0034] Fig.15 For the present invention Fig.14 Front view of the structure.

[0035] Fig.16 It is a schematic diagram of the structural connection of the "L"-shaped connecting rod and the linkage member of the present invention.

[0036] In the figure: 1, hollow sample rod; 101, heat shield plate; 2, support frame; 21, isolation cover; 3, sample holder; 31, support frame; 32, cantilever beam; 33, insulating substrate; 34, upper plate of capacitor; 35, lower plate of capacitor; 4, first rotating mechanism; 41, rotating shaft; 42, connecting frame; 5, first driving mechanism; 51, protective cover; 5101, upper cover body; 5102, lower cover plate; 52, first wire wheel; 53, outer rotor motor; 54, second wire wheel; 55, first planetary gear reduction mechanism; 56, second planetary gear reduction mechanism; 57, transmission sleeve; 571, teeth; 572, tooth groove; 573, rotating groove; 58, rope protection mechanism; 581, "U"-shaped frame; 582, rope guide wheel; 583, spring telescopic cylinder; 59, elastic reset member; 510, conical sleeve; 511, "L"-shaped connecting rod; 5111, elastic deformation part; 5112, inclined plate; 512, electric telescopic rod; 513, brake assembly; 5131, brake disc; 5132, friction plate; 5133, linkage member; 5134, elastic inclined part; 5135, avoidance groove; 6, second driving mechanism; 7, reset component; 71, reset shaft; 72, third wire wheel; 73, reset torsion member; 8, box; 81, gate valve; 9, sleeve; 10, first solenoid valve; 11, second solenoid valve; 12, third solenoid valve; 13, first conduit; 14, electromagnetic inflation valve; 15, second conduit; 16, pull rope conduit. DETAILED DESCRIPTION

[0037] 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. Embodiment 1

[0038] like Figure 1-6 As shown, a cantilever beam testing magnetic moment system with multiple degrees of freedom in a wide temperature range includes a hollow sample rod 1 and a support frame 2, on which a temperature sensor is provided. The present invention arranges the hollow sample rod 1 as a hollow structure to facilitate the passage of cables, and arranges a temperature sensor to monitor the temperature near the support frame 2 in real time, so as to adjust the temperature in time.

[0039] like Figure 5 and Figure 6As shown, it also includes a sample holder 3, which is placed in the support frame 2, and a cantilever beam capacitive magnetic moment sensor is provided on the top of the cantilever beam capacitive magnetic moment sensor, which includes a support frame 31, a cantilever beam 32 is provided on the top of the support frame 31, an insulating substrate 33 is provided on the bottom of the support frame 31, an upper capacitor plate 34 is provided on the bottom of the cantilever beam 32, and a lower capacitor plate 35 is provided on the top of the insulating substrate 33; the present invention obtains the capacitance between the upper capacitor plate 34 and the lower capacitor plate 35, reverses the capacitor spacing through the capacitance obtained in real time, and then reverses the magnetic moment according to the capacitor spacing.

[0040] like Figure 4 As shown, the first rotating mechanism 4 is rotatably connected to the support frame 2 and is driven by the first driving mechanism 5. A rotation angle sensor is provided between the first rotating mechanism 4 and the support frame 2, so that the sample holder 3 can rotate in the first degree of freedom direction. The present invention arranges a rotation angle sensor to detect the rotation angle of the first rotating mechanism 4, so as to accurately control the rotation angle of the first rotating mechanism 4.

[0041] like Figure 4 As shown, the second driving mechanism 6 is placed in the middle of the first rotating mechanism 4, and is connected to the sample holder 3, so that the sample holder 3 can rotate in the second degree of freedom direction; specifically, the second driving mechanism 6 in this embodiment is a micro motor, and the micro motor is a stepping motor or a servo motor or a piezoelectric motor. The preferred embodiment of the present invention is a piezoelectric motor, and the output shaft of the piezoelectric motor is connected to the sample holder 3. The present invention controls the operation of the piezoelectric motor, and the operation of the piezoelectric motor will drive the sample holder 3 to rotate in the second degree of freedom direction, thereby realizing the second degree of freedom angle adjustment. Thereby, multiple degrees of freedom adjustment are realized.

[0042] like Figure 4 As shown, the reset component 7 is placed in the support frame 2 at the bottom of the first rotating mechanism 4 and is transmission-connected to the first rotating mechanism 4 for resetting the first rotating mechanism 4. The present invention sets a reset component 7 to drive the first rotating mechanism 4 to reset to the initial position after detection.

[0043] like Figure 3 and Figure 4As shown, the first driving mechanism 5 includes a protective cover 51 and a first wire wheel 52 sleeved on the outer wall of the first rotating mechanism 4, the protective cover 51 is sleeved on the top of the hollow sample rod 1, and a second wire wheel 54 driven by an outer rotor motor 53 is rotatably arranged in the protective cover 51, and the first wire wheel 52 and the second wire wheel 54 are connected by a pull rope. Specifically, the pull rope in this embodiment is a pull rope made of a polymer nylon material, which can be a Kevlar or a Dyneema. The present invention controls the outer rotor motor 53 to rotate, and the rotation of the outer rotor motor 53 will drive the second wire wheel 54 to rotate, and the rotation of the second wire wheel 54 will reel up the pull rope, so that under the action of the pull rope, the first wire wheel 52 is driven to rotate, and then the first rotating mechanism 4 is driven to rotate, thereby realizing the rotation in the first degree of freedom direction. The outer rotor motor 53 is a prior art and will not be repeated here. It should be emphasized that the outer rotor motor 53 is sleeved on the top of the hollow sample rod 1.

[0044] like Figure 4 As shown, further, the first rotating mechanism 4 includes two rotating shafts 41 rotatably connected to the supporting frame 2 .

[0045] The connecting frame 42 is disposed between the two rotating shafts 41 and connected to the two rotating shafts 41 .

[0046] When the first wire wheel 52 rotates, it will drive the rotating shaft 41 to rotate, and the rotation of the rotating shaft 41 will drive the connecting frame 42 to rotate, and finally realize the rotation in the direction of the first degree of freedom.

[0047] Furthermore, the reset component 7 includes a reset shaft 71 , both ends of which are rotatably connected to the inner wall of the support frame 2 .

[0048] Two third wire wheels 72 connected by a pull rope transmission are distributed up and down, and are respectively sleeved on the reset shaft 71 and the side walls of the first rotating mechanism 4.

[0049] The reset torsion member 73 has one end connected to the side wall of the third wire wheel 72 on the reset shaft 71 , and the other end connected to the support frame 2 .

[0050] The present invention sets the third pulley 72. When the first driving mechanism 5 drives the first rotating mechanism 4 to rotate, the rotation of the first rotating mechanism 4 will drive the third pulley 72 on the first rotating mechanism 4 to rotate. At the same time, the pull rope on the third pulley 72 on the first rotating mechanism 4 will drive the third pulley 72 on the reset shaft 71 to rotate. The rotation of the third pulley 72 on the reset shaft 71 will drive the reset shaft 71 to rotate after overcoming the torque of the reset torsion member 73. The rotation of the reset shaft 71 will cause the reset torsion member 73 to twist and store energy, so as to drive the first rotating mechanism 4 to reset when the first driving mechanism 5 stops working.

[0051] It also includes a box body 8, which is sleeved outside the support frame 2 and has a temperature control mechanism and a magnetic field adjustment mechanism inside.

[0052] The sleeve 9 is sleeved outside the hollow sample rod 1, and its top is connected to the first driving mechanism 5, and its bottom is connected to the box 8. Further, in this embodiment, if the system requires static exchange gas cooling, the sleeve 9 and the box 8 can be directly sealed and connected.

[0053] In another embodiment, if Figure 1 As shown, if the system needs to perform dynamic exchange gas refrigeration, the sleeve 9 and the box body 8 are sealed and connected via a gate valve 81.

[0054] Specifically, the protective cover 51 includes an upper cover body 5101 and a lower cover plate 5102 . The lower cover plate 5102 is fixedly sleeved with the side wall of the hollow sample rod 1 . The top of the lower cover plate 5102 is connected to the upper cover body 5101 . The bottom of the lower cover plate 5102 is connected to the top of the box body 8 through the sleeve 9 .

[0055] Furthermore, the present embodiment also includes a gas washing system, which includes a first solenoid valve 10 , which is placed on the top side wall of the sleeve 9 and one end of which is connected to the interior of the sleeve 9 .

[0056] The second solenoid valve 11 is disposed on the bottom side wall of the sleeve 9 , and one end of the second solenoid valve 11 is communicated with the interior of the sleeve 9 .

[0057] One end of the third solenoid valve 12 is connected to the other end of the first solenoid valve 10 and the other end of the second solenoid valve 11 through the first conduit 13, and the other end of the third solenoid valve 12 is connected to a vacuum pump.

[0058] The helium inflation device is connected to the first conduit 13 via the electromagnetic inflation valve 14 and the second conduit 15 .

[0059] The present invention sets a gas washing component. During gas washing, the first solenoid valve 10, the second solenoid valve 11, the third solenoid valve 12 and the electromagnetic inflation valve 14 are controlled to be closed; the vacuum pump is started, and then the third solenoid valve 12, the second solenoid valve 11 and the first solenoid valve 10 are opened in sequence; the gas is evacuated until the air pressure is less than a preset value, and then the third solenoid valve 12 is closed, the electromagnetic inflation valve 14 is opened, helium is filled, and then the electromagnetic inflation valve 14 is closed, and the third solenoid valve 12 is opened again, and the above-mentioned inflation and exhaust steps are repeated, and inflation and exhaust are performed three to four times to complete gas washing.

[0060] To further reduce the loss of cold, the present embodiment also includes an isolation cover 21, which is threadedly connected to the outer wall of the support frame 2 and has micro-pores at the bottom thereof that are connected to the box body 8. The present invention prevents the air flow from affecting the accuracy of the detection data of the cantilever beam capacitive magnetic moment sensor during the dynamic exchange of cold by setting the isolation cover 21; at the same time, the loss of cold can be reduced.

[0061] A plurality of heat shield plates 101 are arranged in an array around the side wall of the hollow sample rod 1.

[0062] It also includes a pull rope conduit 16, one end of which is connected to the support frame 2, and the other end is connected to the protective cover 51, and the middle part of which passes through the heat shield plate 101. The present invention reduces the exchange of cold energy in the sleeve 9 and the cold energy in the isolation cover 21 by setting the pull rope conduit 16, thereby reducing cold energy loss.

[0063] During installation, first control the gate valve 81 to close, then insert the docking rod into the sleeve 9, and then control the first solenoid valve 10, the second solenoid valve 11, the third solenoid valve 12 and the electromagnetic inflation valve 14 to close; start the vacuum pump, and then open the third solenoid valve 12, the second solenoid valve 11 and the first solenoid valve 10 in sequence; evacuate the air until the air pressure is less than the preset value, then close the third solenoid valve 12, open the electromagnetic inflation valve 14, fill it with helium, then close the electromagnetic inflation valve 14, open the third solenoid valve 12 again, repeat the above-mentioned inflation and evacuation three to four times to complete the gas washing.

[0064] During detection, by controlling the outer rotor motor 53 to work, the outer rotor motor 53 will drive the second wire wheel 54 to rotate, and the rotation of the second wire wheel 54 will drive the first wire wheel 52 to rotate. The rotation of the first wire wheel 52 will drive the rotating shaft 41 to rotate, and the rotation of the rotating shaft 41 will drive the third wire wheel 72, the connecting frame 42 and the sample holder 3 to rotate, thereby realizing the rotation in the first degree of freedom direction. The rotation angle of the rotating shaft 41 is monitored by the rotation angle sensor, so that the first rotating mechanism 4 is rotated to the desired position.

[0065] Then, by controlling the piezoelectric motor to work, the piezoelectric motor will drive the sample holder 3 to rotate, thereby realizing the rotation in the second degree of freedom. The present invention ensures that the magnetic field can pass through the sample at multiple arbitrary angles through the rotation of two degrees of freedom, thereby realizing multi-temperature zone and multi-angle detection.

[0066] The present invention cooperates with the first rotating mechanism 4, the first driving mechanism 5 and the second driving mechanism 6. On the one hand, the present invention adopts a pull-rope transmission method, which reduces the cold leakage rate compared to the gear transmission method in the prior art, so that the temperature at the sample holder 3 tends to be stable, thereby improving the accuracy of the detection data; on the second hand, the present invention adopts a pull-rope transmission method, which simplifies the cable arrangement method and reduces the wiring difficulty in the prior art compared to the gear transmission method in the prior art; on the third hand, it avoids the problem of poor contact caused by the cable easily following the rotation of the hollow sample rod 1 and the problem of cable wear and resulting in a short service life of the equipment in the prior art; on the fourth hand, the pull-rope drive has a smaller return difference than the gear drive. Embodiment 2

[0067] Although the first embodiment can reduce the cold leakage, the pull rope is easy to wear during long-term detection and use. When the pull rope passes through the support frame 2, it is easy to cause the pull rope to get stuck in the support frame 2. Forcibly pulling the pull rope may easily cause the pull rope to break. At the same time, when adjusting the rotation angle of the first rotating mechanism 4, the first embodiment can only perform coarse adjustment, which leads to the problem of inaccurate detection data. The following improvements are made on the basis of the first embodiment.

[0068] like Figure 7-16 As shown, the first driving mechanism 5 also includes a first planetary gear reduction mechanism 55, whose input shaft is drivingly connected to the output shaft of the outer rotor motor 53; the present invention realizes a first-stage reduction transmission by setting the first planetary gear reduction mechanism 55. The first planetary gear reduction mechanism 55 is a prior art and will not be described in detail here.

[0069] The input shaft of the second planetary gear reduction mechanism 56 is connected to the output shaft of the first planetary gear reduction mechanism 55 through a transmission sleeve 57, and the output shaft is connected to the second wire wheel 54. The present invention realizes two-stage reduction transmission by setting the first planetary gear reduction mechanism 55, thereby realizing fine adjustment.

[0070] like Fig. 9 and Fig.10 As shown, specifically, the second planetary gear reduction mechanism 56 includes a housing, an inner gear ring is provided inside the housing, a plurality of array-distributed planetary gears are meshed in the inner gear ring, the planetary gears are connected by a planet carrier, an output shaft extending to the outside of the housing is passed through the planet carrier, the planetary gears are meshed with the same sun gear, and the sun gear is provided with an input shaft passing through and extending to the outside of the housing.

[0071] The rope protection mechanism 58 includes a "U"-shaped frame 581 fixedly connected to the inner arm of the protective cover 51; a set of rope guide wheels 582 are provided at both ends, and each set of rope guide wheels 582 has two rope guide wheels, and a rope guide wheel 582 is connected to the bracket through a spring telescopic cylinder 583 in the middle; the present invention realizes the protection of the rope by setting the rope protection mechanism 58, thereby preventing the rope from breaking. A pressure sensor for detecting the tension of the rope is provided between the rope guide wheel 582 and the bracket.

[0072] When the pull rope passing through the support frame 2 is stuck with the support frame 2, the pull rope is tightened, and the spring telescopic cylinder 583 is moved to the side of the second wire wheel 54, so as to prevent the pull rope from being broken when the pull rope passing through the support frame 2 is stuck with the support frame 2. At the same time, the pressure sensor detects the pressure value for real-time detection of the pull rope tension.

[0073] The transmission sleeve 57 is connected to the first planetary gear reduction mechanism 55 through an elastic reset member 59, and the inner wall of its top end is slidably sleeved up and down with the output shaft of the first planetary gear reduction mechanism 55 through a spline; the middle part rotates and slides in the input shaft of the second planetary gear reduction mechanism 56, and the outer wall of the other end is slidably sleeved with the inner wall of the output shaft of the second planetary gear reduction mechanism 56 through a spline, the side wall of the middle part is provided with teeth 571, and the inner wall of the output shaft of the second planetary gear reduction mechanism 56 is provided with tooth grooves 572 matching with the teeth 571, and the output shaft of the second planetary gear reduction mechanism 56 is provided with a rotating groove 573 rotatably connected with the spline at the bottom of the transmission sleeve 57.

[0074] The present invention sets a transmission sleeve 57. When the transmission sleeve 57 is in the initial position, that is, the top is transmission-connected to the output shaft of the first planetary gear reduction mechanism 55, the middle is rotationally connected to the input shaft of the second planetary gear reduction mechanism 56, and the bottom is transmission-connected to the inner wall of the output shaft of the second planetary gear reduction mechanism 56. At this time, coarse adjustment is achieved by controlling the operation of the outer rotor motor 53. The transmission sleeve 57 is moved downward by adjusting the position of the transmission sleeve 57. At this time, the top of the transmission sleeve 57 is transmission-connected to the output shaft of the first planetary gear reduction mechanism 55, the middle of the transmission sleeve 57 is transmission-connected to the input shaft of the second planetary gear reduction mechanism 56, and the bottom of the transmission sleeve 57 is rotationally connected to the inner wall of the output shaft of the second planetary gear reduction mechanism 56. Then, fine adjustment is achieved by controlling the operation of the outer rotor motor 53.

[0075] It also includes a tapered sleeve 510 which is sleeved on the top of the transmission sleeve 57 .

[0076] The "L"-shaped connecting rod 511 has one end connected to the free end of the spring telescopic cylinder 583 and the other end in contact with the inclined surface of the conical sleeve 510. An elastic deformation portion 5111 is provided in the middle of its horizontal section, and an inclined sheet 5112 is provided on the side wall in the middle of its horizontal section.

[0077] The electric telescopic rod 512 is placed on the top of the inclined plate 5112.

[0078] In the first aspect, the present invention controls the electric telescopic rod 512 to extend, and the extended electric telescopic rod 512 will conflict with the inclined piece 5112. The electric telescopic rod 512 is continued to be controlled to extend, and after overcoming the elastic force of the elastic deformation part 5111 and the elastic reset part 59, the horizontal part of the "L"-shaped connecting rod 511 moves downward. The downward movement of the horizontal part of the "L"-shaped connecting rod 511 will push the conical sleeve 510 to move downward, and the downward movement of the conical sleeve 510 will push the transmission sleeve 57 to move downward, so that the transmission sleeve 57 slides downward from the initial position, that is, from the position as shown in FIG. Fig.10 Move to the position Fig.11In the position shown, the top of the transmission sleeve 57 is finally connected to the output shaft of the first planetary gear reduction mechanism 55, the middle of the transmission sleeve 57 is connected to the input shaft of the second planetary gear reduction mechanism 56, and the bottom of the transmission sleeve 57 is connected to the inner wall of the output shaft of the second planetary gear reduction mechanism 56. Then, by controlling the outer rotor motor 53 to work, the outer rotor motor 53 will drive the input shaft of the first planetary gear reduction mechanism 55 to rotate, which will be decelerated by the first planetary gear reduction mechanism 55, and finally drive the output shaft of the first planetary gear reduction mechanism 55 to rotate. The rotation of the output shaft of the first planetary gear reduction mechanism 55 will drive the transmission sleeve 57 to rotate. The rotation of the transmission sleeve 57 will drive the sun gear of the second planetary gear reduction mechanism 56 to rotate. The rotation of the sun gear of the second planetary gear reduction mechanism 56 will drive the planetary gear to rotate. The rotation of the planetary gear will drive the planet carrier to rotate. The rotation of the planet carrier drives the output shaft of the second planetary gear reduction mechanism 56 to rotate. After the second planetary gear reduction mechanism 56 is decelerated, a smaller transmission ratio is obtained, so that fine adjustment can be achieved. The rotation of the output shaft of the second planetary gear reduction mechanism 56 will drive the second wire wheel 54 to rotate, and finally drive the second wire wheel 54 to rotate for fine adjustment.

[0079] Secondly, when the spring telescopic cylinder 583 moves toward the side of the second pulley 54, it will push the "L"-shaped connecting rod 511 to collide with the tapered sleeve 510, and finally push the tapered sleeve 510 to move downward. The downward movement of the tapered sleeve 510 will drive the transmission sleeve 57 to move downward, and finally the middle part of the transmission sleeve 57 will be rotatably connected to the input shaft of the second planetary gear reduction mechanism 56, and the bottom of the transmission sleeve 57 will be rotatably connected to the output shaft of the second planetary gear reduction mechanism 56, to perform secondary deceleration, giving the outer rotor motor 53 sufficient execution reaction time, thereby avoiding the problem that when the pressure value detected by the pressure sensor is greater than the preset value, the second pulley 54 cannot be controlled to stop rotating in time.

[0080] The brake assembly 513 is also included, and the brake assembly 513 includes a brake disc 5131 disposed on the top of the second wire wheel 54. The present invention locks the second wire wheel 54 by providing the brake assembly 513, thereby preventing the second wire wheel 54 from rotating and resetting due to the resetting effect of the resetting component 7 during the switching process between coarse adjustment and fine adjustment.

[0081] The friction plate 5132 is connected to the bottom of the housing of the second planetary gear reduction mechanism 56 through a return spring.

[0082] The linkage member 5133 has one end placed on the top of the friction plate 5132 and the other end located between the inclined plate 5112 and the electric telescopic rod 512 . The other end is provided with an elastic inclined portion 5134 that cooperates with the electric telescopic rod 512 .

[0083] A side wall around the free end of the electric telescopic rod 512 is provided with an escape groove 5135 for escaping the elastic inclined portion 5134 .

[0084] By controlling the electric telescopic rod 512 to extend, it will first come into contact with the elastic inclined portion 5134. Under the effect of the extension of the electric telescopic rod 512, the linkage member 5133 will be pushed to move downward. The downward movement of the linkage member 5133 will push the friction plate 5132 to come into contact with the brake disc 5131, thereby achieving the limitation of the second wire wheel 54.

[0085] When performing coarse adjustment, first control the outer rotor motor 53 to work. The operation of the outer rotor motor 53 will drive the input shaft of the first planetary gear reduction mechanism 55 to rotate, which will be decelerated by the first planetary gear reduction mechanism 55 and finally drive the output shaft of the first planetary gear reduction mechanism 55 to rotate. The rotation of the output shaft of the first planetary gear reduction mechanism 55 will drive the transmission sleeve 57 to rotate. Since the transmission sleeve 57 is in an initial state, its top is transmission-connected with the output shaft of the first planetary gear reduction mechanism 55, the middle is rotationally connected with the input shaft of the second planetary gear reduction mechanism 56, and the bottom is transmission-connected with the inner wall of the output shaft of the second planetary gear reduction mechanism 56. The rotation of the transmission sleeve 57 will drive the output shaft of the second planetary gear reduction mechanism 56 to rotate. The rotation of the output shaft of the second planetary gear reduction mechanism 56 will drive the second wire wheel 54 to rotate. The rotation of the second wire wheel 54 will drive the first wire wheel 52 to rotate. The rotation of the first wire wheel 52 will drive the rotating shaft 41 to rotate. The rotation of the rotating shaft 41 will drive the third wire wheel 72, the connecting frame 42 and the sample holder 3 to rotate, thereby realizing the rotation in the first degree of freedom direction and finally achieving coarse adjustment.

[0086] When fine adjustment is performed, the electric telescopic rod 512 is controlled to extend to push the linkage member 5133 downward, and the linkage member 5133 moves downward to push the friction plate 5132 to contact the brake disc 5131, thereby limiting the position of the second wire wheel 54, and then the electric telescopic rod 512 is continued to be controlled to extend until it contacts the inclined plate 5112, and the electric telescopic rod 512 is continued to be controlled to extend, and after overcoming the elastic force of the elastic deformation part 5111 and the elastic reset part 59, the horizontal part of the "L"-shaped connecting rod 511 is moved downward. The horizontal portion of the "L"-shaped connecting rod 511 moves downward, which will push the tapered sleeve 510 downward. The tapered sleeve 510 moves downward, which will push the transmission sleeve 57 downward, so that the transmission sleeve 57 slides downward from the initial position. Finally, the top of the transmission sleeve 57 is connected to the output shaft of the first planetary gear reduction mechanism 55, the middle of the transmission sleeve 57 is connected to the input shaft of the second planetary gear reduction mechanism 56, and the bottom of the transmission sleeve 57 is connected to the inner wall of the output shaft of the second planetary gear reduction mechanism 56. At this time, the avoidance groove 5135 is connected to the output shaft of the second planetary gear reduction mechanism 56. Corresponding to the elastic inclined portion 5134, the friction plate 5132 is reset upward to realize the release of the limit of the second wire wheel 54; then by controlling the operation of the outer rotor motor 53, the operation of the outer rotor motor 53 will drive the input shaft of the first planetary gear reduction mechanism 55 to rotate, which will be decelerated by the first planetary gear reduction mechanism 55, and finally drive the output shaft of the first planetary gear reduction mechanism 55 to rotate. The rotation of the output shaft of the first planetary gear reduction mechanism 55 will drive the transmission sleeve 57 to rotate. The rotation of the transmission sleeve 57 will drive the input shaft and the sun gear of the second planetary gear reduction mechanism 56 to rotate. The rotation of the sun gear of the second planetary gear reduction mechanism 56 will drive the planetary gear to rotate. The rotation of the planetary gear will drive the planetary carrier to rotate. The rotation of the planetary carrier will drive the output shaft of the second planetary gear reduction mechanism 56 to rotate. After the second planetary gear reduction mechanism 56 is decelerated, a smaller transmission ratio is obtained, so that fine adjustment can be achieved. The rotation of the output shaft of the second planetary gear reduction mechanism 56 will drive the second wire wheel 54 to rotate, and finally drive the second wire wheel 54 to rotate for fine adjustment.

[0087] During the adjustment process, when the pull rope passing through the support frame 2 is stuck with the support frame 2, the pull rope is tightened, and the spring telescopic cylinder 583 is moved toward the side of the second wire wheel 54. The pressure sensor detects the pressure value, which is used to detect the pull rope tension in real time. When the pressure value detected by the pressure sensor is greater than the preset value, the outer rotor motor 53 is controlled to stop working.

[0088] During the coarse adjustment process, when the pull rope passing through the support frame 2 is stuck with the support frame 2, the pull rope is tightened, moving the spring telescopic cylinder 583 toward the side of the second pulley 54, and the extension of the telescopic end of the spring telescopic cylinder 583 will push the "L"-shaped connecting rod 511 to the right. The right movement of the "L"-shaped connecting rod 511 will push the conical sleeve 510 to move downward, and the downward movement of the conical sleeve 510 will push the transmission sleeve 57 to move downward, thereby causing the transmission sleeve 57 to slide downward from the initial position, and finally causing the transmission sleeve 57 to change from the initial position to the fine adjustment position, thereby reducing the transmission ratio. Since the transmission ratio is high at the initial position and there is a time difference between data transmission and actuator execution, by reducing the transmission ratio, the rotation speed of the second pulley 54 is reduced, giving sufficient execution reaction time to the outer rotor motor 53, thereby avoiding the problem that when the pressure value detected by the pressure sensor is greater than the preset value, the second pulley 54 cannot be controlled to stop rotating in time.

[0089] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range, comprising a hollow sample rod and a support frame, wherein a temperature sensor is provided on the support frame, characterized in that: Also includes: A sample holder is placed in a support frame, and a cantilever capacitive magnetic moment sensor is arranged on the top of the sample holder. The cantilever capacitive magnetic moment sensor comprises a support frame, a cantilever is arranged on the top of the support frame, an insulating substrate is arranged on the bottom of the support frame, an upper capacitor plate is arranged on the bottom of the cantilever, and a lower capacitor plate is arranged on the top of the insulating substrate; A first rotating mechanism, which is rotatably connected to the support frame and driven by a first driving mechanism, and an angle sensor is provided between the first rotating mechanism and the support frame, so as to enable the sample holder to rotate in a first degree of freedom direction; A second driving mechanism, which is disposed in the middle of the first rotating mechanism and is connected to the sample holder, and is capable of rotating the sample holder in a second degree of freedom direction; a reset component, which is placed in a support frame at the bottom of the first rotating mechanism and is transmission-connected to the first rotating mechanism, and is used to reset the first rotating mechanism; The first driving mechanism includes a protective cover and a first wire wheel sleeved on the outer side wall of the first rotating mechanism. The protective cover is sleeved on the top of the hollow sample rod. A second wire wheel driven by an outer rotor motor is rotatably arranged inside the protective cover. The first wire wheel and the second wire wheel are connected by a pull rope.

2. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 1, characterized in that: The first rotating mechanism includes two rotating shafts rotatably connected to the support frame; The connecting frame is placed between the two rotating shafts and connected to the two rotating shafts.

3. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 1, characterized in that: The second driving mechanism is a micro motor, and the micro motor is a stepping motor, a servo motor or a piezoelectric motor.

4. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 1, characterized in that: The reset component includes a reset shaft, both ends of which are rotatably connected to the inner side wall of the support frame; Two third wire wheels connected by a pull rope transmission, which are distributed up and down, and are respectively sleeved on the reset shaft and the peripheral side wall of the first rotating mechanism; The reset torsion member has one end connected to the side wall of the third wire wheel on the reset shaft, and the other end connected to the support frame.

5. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 1, characterized in that: It also includes a box body, which is sleeved outside the support frame and has a temperature control mechanism and a magnetic field adjustment mechanism inside; A sleeve, which is sleeved outside the hollow sample rod, with a top connected to the first driving mechanism and a bottom connected to the box; The gas washing system includes a first solenoid valve, which is disposed on the top side wall of the sleeve and one end of which is connected to the interior of the sleeve; A second solenoid valve is disposed on the bottom side wall of the sleeve and one end of the second solenoid valve is connected to the interior of the sleeve; A third solenoid valve, one end of which is connected to the other end of the first solenoid valve and the other end of the second solenoid valve through the first conduit, and the other end of which is connected to a vacuum pump; The helium inflation device is connected with the first conduit through the electromagnetic inflation valve and the second conduit.

6. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 1, characterized in that: The first driving mechanism also includes a first planetary gear reduction mechanism, whose input shaft is drivingly connected to the output shaft of the outer rotor motor; The second planetary gear reduction mechanism has an input shaft drivingly connected to the output shaft of the first planetary gear reduction mechanism through a transmission sleeve, and an output shaft drivingly connected to the second wire wheel.

7. A cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 6, characterized in that: It also includes a rope protection mechanism, which includes a "U"-shaped frame fixedly connected to the inner arm of the protection cover; a group of rope guide wheels are provided at both ends, and each group of rope guide wheels has two rope guide wheels, and a rope guide wheel is connected to the middle part through a spring telescopic cylinder and a bracket.

8. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 7, characterized in that: The transmission sleeve is connected to the first planetary gear reduction mechanism through an elastic reset member, and the inner wall of the top end thereof is slidably sleeved up and down with the output shaft of the first planetary gear reduction mechanism through a spline; the middle portion thereof rotates and is slidably sleeved in the input shaft of the second planetary gear reduction mechanism, and the outer wall of the other end thereof is slidably sleeved with the inner wall of the output shaft of the second planetary gear reduction mechanism through a spline, the circumferential side wall of the middle portion is provided with teeth, the inner wall of the output shaft of the second planetary gear reduction mechanism is provided with tooth grooves matching the teeth, and the output shaft of the second planetary gear reduction mechanism is provided with a rotating groove rotatably connected to the spline at the bottom of the transmission sleeve.

9. The cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 8, characterized in that: It also includes a tapered sleeve, which is sleeved on the top of the transmission sleeve; An "L"-shaped connecting rod, one end of which is connected to the free end of the spring telescopic cylinder, and the other end of which is in contact with the inclined surface of the conical sleeve, an elastic deformation part is provided in the middle of the horizontal section, and an inclined plate is provided on the side wall of the middle of the horizontal section; An electric telescopic rod is placed on top of the tilting piece.

10. A cantilever beam magnetic moment testing system with multiple degrees of freedom in a wide temperature range according to claim 9, characterized in that: Also included is a brake assembly, the brake assembly including a brake disc disposed on top of the second reel; A friction plate connected to the bottom of the second planetary gear reduction mechanism housing through a return spring; A linkage member, one end of which is placed on the top of the friction plate, the other end of which is located between the tilting plate and the electric telescopic rod, and the other end of which is provided with an elastic tilting portion that cooperates with the electric telescopic rod; The side wall around the free end of the electric telescopic rod is provided with an avoidance groove for avoiding the elastic inclined part.

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