CN210466940U - Electric excitation magnetic suspension experimental device - Google Patents
Electric excitation magnetic suspension experimental device Download PDFInfo
- Publication number
- CN210466940U CN210466940U CN201921080198.3U CN201921080198U CN210466940U CN 210466940 U CN210466940 U CN 210466940U CN 201921080198 U CN201921080198 U CN 201921080198U CN 210466940 U CN210466940 U CN 210466940U
- Authority
- CN
- China
- Prior art keywords
- excitation
- electro
- experimental apparatus
- lifting mechanism
- magnetic levitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an electric excitation magnetic suspension experimental apparatus, include: a mounting frame; the excitation iron core is arranged at the upper part of the mounting frame; the lifting mechanism is arranged at the lower part of the mounting rack; and a position sensor provided to the elevating mechanism, for detecting a position of the suspended sample in a suspended state between the excitation core and the elevating mechanism, and outputting a feedback signal to the control device to control a change in current of the excitation core. The utility model discloses be provided with but height-adjusting's elevating system, the elevating system upper end is equipped with position sensor, can adjust the distance between the body of being surveyed (suspension appearance spare) and the excitation iron core according to its feedback signal, for the body of being surveyed provides sufficient suspension scope, is convenient for carry out the research of the relation of magnetic force, electric current, interval in wide enough scope.
Description
Technical Field
The utility model relates to a magnetic suspension experiment teaching field, in particular to relevant experimental apparatus who realizes the magnetic suspension through the electric current excitation mode.
Background
The magnetic levitation transmission technology is a typical electromechanical integration technology integrating electromagnetism, electronic technology, control engineering, signal processing, dynamics and the like. With the development of electronic technology, control engineering, signal processing, electromagnetic theory and novel electromagnetic materials, the magnetic levitation technology has been developed greatly and has been widely applied in many fields, such as magnetic levitation trains, active control magnetic levitation bearings, magnetic levitation balances, magnetic levitation transmission equipment, magnetic levitation measuring instruments, magnetic levitation robot wrists, etc., and particularly, the magnetic levitation trains are most representative.
In the magnetic suspension teaching experiment, the excitation iron core generates a controllable magnetic field by mainly exciting controllable current of the enameled wire winding, so that the stable suspension (the balance of electromagnetic attraction and gravity) of the suspended matter with single degree of freedom (the direction of gravity) is realized. The inventor finds that most of the existing magnetic suspension experimental devices are in single-point forms (namely, the distance from suspended matters to the electromagnet/permanent magnet is not adjustable and is similar to a magnetic suspension globe), and the existing magnetic suspension demonstration device has the technical problem that the controllable stroke is small (<10mm), so that the magnetic suspension demonstration device cannot provide experimental data wide enough to further research the relationship among magnetic force, current and distance, and the limitation is obvious and needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at developing an adjustable, stable magnetic suspension experimental apparatus on a large scale to provide comparatively wide range test data, be convenient for research carries out the relation of magnetic force, electric current, interval.
The utility model discloses a following technical scheme realizes:
electric excitation magnetic suspension experimental apparatus includes:
a mounting frame;
the excitation iron core is arranged at the upper part of the mounting frame;
the lifting mechanism is arranged at the lower part of the mounting rack;
and a position sensor provided to the elevating mechanism, for detecting a position of the suspended sample in a suspended state between the excitation core and the elevating mechanism, and outputting a feedback signal to the control device to control a change in current of the excitation core.
In one embodiment, the lifting mechanism comprises a telescopic rod, the lower end of the telescopic rod is fixed at the lower position of the mounting frame, and the position sensor is arranged at the upper end of the telescopic rod.
In one embodiment, the telescopic rod comprises:
the fixed cylinder is arranged at the lower part of the mounting rack;
and the sliding rod is slidably arranged in the fixed cylinder and can be locked by an adjusting knob arranged outside the fixed cylinder.
In one embodiment, the upper end of the lifting mechanism is further provided with a drop-proof tray, and the position sensor passes through the drop-proof tray and is exposed out of the upper surface of the drop-proof tray.
The anti-falling tray mainly prevents the suspended sample pieces from falling to a table top or the ground under special conditions.
In one embodiment, the bottom of the excitation core is further provided with an anti-collision baffle, and the anti-collision baffle covers at least the bottom of the excitation core in a whole manner so as to avoid direct collision between the suspension sample piece and the excitation core under special conditions.
In one embodiment, the device further comprises a coupling seat through which the field core is coupled to the mounting bracket. Preferably, a level gauge is arranged on the connecting seat.
In one embodiment, the bottom of the mounting frame is also provided with a plurality of leveling foot pads. The foot pads are matched with the gradienter to finely adjust the directions of a magnetic field and a magnetic force caused by the iron core, so that the floating direction of the suspended sample piece is basically kept in the gravity direction.
In one embodiment, the position sensor is an eddy current displacement sensor.
In one embodiment, a sample holder is further arranged on the mounting frame between the excitation iron core and the lifting mechanism, and the sample holder is used for bearing a distance measuring disc for testing the output characteristic of the position sensor.
When carrying out the test of eddy current sensor output characteristic, will find range the dish and place on the sample holds in the palm, through the lift of rotatory lifter, change the distance between eddy current displacement sensor and the range finding disc to the eddy current displacement sensor output characteristic under the different materials of research.
The utility model has the advantages that:
the utility model is provided with a lifting mechanism with adjustable height, the upper end of the lifting mechanism is provided with a position sensor, the distance between a measured body (suspension sample piece) and an excitation iron core can be adjusted according to the feedback signal of the position sensor, and a sufficient suspension range is provided for the measured body, so that the research on the relation of magnetic force, current and distance can be conveniently carried out in a sufficiently wide range; in addition, when the position sensor adopts a non-contact eddy current displacement sensor as a position feedback device, the system stability (the suspension sample piece is stabilized at a certain position) during the experiment of the device can be further ensured by the control device electrically connected with the eddy current displacement sensor.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a three-dimensional structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
reference numerals: 1. a level gauge; 2. a field core; 3. a position sensor; 4. a lifting mechanism; 5. a base; 6. leveling the foot pad; 7. a sample holder; 8. a drop-proof tray; 9. an anti-collision baffle plate; 10. a cross beam; 11. erecting a rod; 12. a connecting seat; 13. a supporting plate; 14. adjusting a knob; 15. and a lifting scale.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present application, unless otherwise expressly specified or limited, the terms "mounted," "attached," "connected," "secured," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present application, it is to be understood that the orientation or positional relationship as indicated by the following terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., is based on the orientation or positional relationship as shown in the drawings and is for convenience only to facilitate the description and to simplify the description, but does not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus is not to be construed as limiting the invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the present embodiment discloses an electric excitation magnetic levitation experimental apparatus, which includes:
a mounting frame;
an excitation iron core 2 provided on the upper part of the mounting frame;
the lifting mechanism 4 is arranged at the lower part of the mounting rack;
and a position sensor 3 provided in the elevating mechanism 4, for detecting a position of the floating sample in a floating state between the field core 2 and the elevating mechanism 4, and outputting a feedback signal to a control unit to control a change in current of the field core 2.
For realizing the utility model discloses an objective, with position sensor 3 electric connection's controlling means adopts PID closed loop control's mode, and this control mode is a closed loop dynamic feedback control, produces control signal according to the position of the body (the suspension appearance) of being surveyed and the difference of anticipating the setting position, as long as there is the difference this control mode will last control output, the change of 2 electric currents of control signal direct control excitation iron core, realize magnetic force's change then, order about the body of being surveyed (like the magnetism steel ball) to setting for the position motion or keep setting for the position.
Preferably, the position sensor 3 is an eddy current displacement sensor to generate a "clean" position feedback signal and achieve a larger levitation range; specifically in the utility model discloses in, eddy current displacement sensor and excitation iron core separately set up (eddy current displacement sensor is located elevating system), under the PID control mode, set up a balanced voltage Vset usually (eddy current displacement sensor's voltage and the distance that suspends appearance piece to eddy current displacement sensor are the one-to-one, therefore to a certain extent, eddy current displacement sensor's output voltage can represent the distance), like this under PID control, eddy current displacement sensor is unchangeable for the fixed value to the distance that suspends appearance piece, control "single point" or "very little stroke near single point" that has used eddy current displacement sensor in other words, this very little stroke can be considered linear by approximation, thereby realized a great suspension scope.
The mounting bracket comprises a base 5, a main frame is arranged on the base 5, an excitation iron core 2 and a lifting mechanism 4 are respectively arranged on the top of the main frame and the lower part of the main frame, a position sensor 3 is arranged on the top of the lifting mechanism 4, and the lifting mechanism 4 can drive the position sensor 3 to lift so as to change the distance between the position sensor and the excitation iron core 2.
Specifically, the base 5 is an A-shaped base 5 which is in a regular triangle shape, and three vertexes at the bottom of the base 5 are respectively provided with a leveling foot pad 6; the body frame is the portal frame, and on this portal frame was located to experimental apparatus's part, the portal frame included two pole settings 11 of locating on base 5, and the mid point department on 5 limits of base is located respectively to two pole settings 11, and two pole settings 11 tops are equipped with crossbeam 10, and the crossbeam 10 level is arranged, and two stand tops are connected respectively at the both ends of crossbeam 10. Be equipped with connecting seat 12 on crossbeam 10, connecting seat 12 is cylindrical, the cavity has been seted up to connecting seat 12, connecting seat 12 top and crossbeam 10 fixed connection, be equipped with excitation iron core 2 in the connecting seat 12, the excitation iron core is cylindrical, excitation iron core 2 stretches out in by connecting seat 12, 2 bottoms of excitation iron core are equipped with anticollision baffle 9, anticollision baffle 9 is the circular slab, anticollision baffle and 2 coaxial line settings of excitation iron core, its diameter is greater than excitation iron core 2 for its lower extreme that is enough to wrap up excitation iron core 2. Preferably, the crash barrier 9 may be made of ABS. The connecting base 12 is also provided with a current input interface for energizing the field core 2. The top of the connecting base 12 is also provided with a level gauge 1, and the direction of the device is adjusted through the level gauge 1, so that the magnetic force direction of the excitation iron core 2 is basically consistent with the gravity direction of the tested body. Preferably, the spirit level 1 is a spirit level.
Two pole settings 11 are last to be equipped with a sample respectively and to hold in the palm 7, and two samples hold in the palm 7 and locate same horizontal plane, and the sample holds in the palm 7 the level and is less than crashproof baffle 9, and two samples hold in the palm 7 relative sides and be equipped with the recess, and the recess is the arc. The sample holders 7 are mainly used for holding distance measuring discs (not shown in the figures and belonging to elements under specific use environments), and the distance measuring discs are arranged on the two sample holders 7 through grooves. When the output characteristic of the eddy current displacement sensor is tested, the distance between the eddy current displacement sensor and the distance measuring disc is changed through the lifting mechanism, and the output characteristic of the eddy current displacement sensor is checked.
In addition, still be equipped with fagging 13 on two pole settings 11, fagging 13 level sets up in pole setting 11 lower parts, fagging 13 both ends and two pole settings 11 fixed connection, are equipped with elevating system 4 in the middle of fagging 13, and elevating system 4 includes a telescopic link, the lower extreme of telescopic link is fixed in on the fagging 13, position sensor 3 locates the upper end position of telescopic link. Preferably, the telescopic rod may comprise: a fixed cylinder arranged on the supporting plate 13; and the sliding rod is arranged in the fixed cylinder in a sliding manner and can be locked by an adjusting knob 14 arranged outside the fixed cylinder. The sliding rod can be kept fixed with the fixed cylinder by screwing the adjusting knob 14, and the sliding rod can be stretched in the fixed cylinder by unscrewing the adjusting knob 14. In addition, the slide bar is provided with a lifting scale 15, and the expansion and contraction amount of the slide bar is controlled by the lifting scale 15.
The sliding rod top portion is equipped with the carrier post, and the carrier post is cylindrical structure, and the carrier post is connected with the sliding rod coaxial line, and the carrier post top is equipped with prevents falling tray 8, prevents falling tray 8 and is the disc structure, and its diameter is greater than the diameter of carrier post, prevents falling tray 8 and carrier post coaxial line setting, is provided with the annular baffle of one deck along preventing falling tray 8 edge for suspension appearance spare falls desktop or ground under the special circumstances. When the bearing column is arranged
When the tray 8 is prevented from falling, the eddy current displacement sensor should penetrate the tray 8 and be exposed out of the upper surface, and a signal output port of the eddy current displacement sensor is further arranged on the side surface of the bearing column.
Before use, the level of the excitation iron core 2 is adjusted according to the level meter 1 and the leveling foot pad 6, so that the direction of the magnetic force generated by the iron core connected with the excitation power supply is basically consistent with the gravity direction.
When the relation between the magnetic force and the current of the excitation iron core and the distance between the suspension sample piece is researched and tested, the target value (set value) of the eddy current displacement sensor is set to be unchanged, so that the distance from the suspension sample piece to the eddy current displacement sensor 3 is unchanged, the distance between the suspension sample piece and the excitation iron core 2 is changed through the lifting of the lifting mechanism 4, and the changing conditions of the current and the magnetic force are observed when the distance is changed.
When studying the test of the output characteristic of the eddy current displacement sensor, the distance measuring disc is placed on the sample support 7, the lifting mechanism 4 is lifted by loosening the adjusting knob 14, and the output characteristic of the eddy current displacement sensor under different materials (the distance measuring disc is replaced and the material of the distance measuring disc is different) is observed by changing the distance between the eddy current displacement sensor and the distance measuring disc.
The utility model discloses both can accomplish the relation of magnetic force and exciting current and suspension interval, can study PID control characteristic again, still can study eddy current displacement sensor's output characteristic simultaneously, can realize the stable suspension of long stroke (20mm), so that carry out the research of the relation of magnetic force, electric current, interval in enough wide range, adopt non-contact eddy current displacement sensor as position feedback device, and use down the installation, single-point control (to sensor range) mode, the stability of assurance system that can step forward.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. Electric excitation magnetic suspension experimental apparatus, its characterized in that includes:
a mounting frame;
an excitation iron core (2) arranged on the upper part of the mounting frame;
the lifting mechanism (4) is arranged at the lower part of the mounting rack;
and a position sensor (3) provided in the lifting mechanism (4) for detecting a position of the suspended sample in a suspended state between the field core (2) and the lifting mechanism (4) and outputting a feedback signal to a control device to control a change in current of the field core (2).
2. The electro-excitation magnetic levitation experimental apparatus as recited in claim 1, wherein the lifting mechanism (4) comprises a telescopic rod, the lower end of the telescopic rod is fixed at the lower position of the mounting frame, and the position sensor (3) is arranged at the upper end of the telescopic rod.
3. The electro-active magnetic levitation experimental apparatus as claimed in claim 2, wherein the telescopic rod comprises: the fixed cylinder is arranged at the lower part of the mounting rack;
and the sliding rod is arranged in the fixed cylinder in a sliding manner and can be locked by an adjusting knob (14) arranged outside the fixed cylinder.
4. The electro-excitation magnetic suspension experimental facility as claimed in claim 1, wherein the upper end of the lifting mechanism (4) is further provided with a drop-proof tray (8), and the position sensor (3) passes through the drop-proof tray (8) and is exposed out of the upper surface of the drop-proof tray (8).
5. The electric excitation magnetic levitation experimental device as recited in any one of claims 1-4, wherein the bottom of the excitation core (2) is further provided with a collision-prevention baffle (9), and the collision-prevention baffle (9) at least covers the whole bottom of the excitation core (2).
6. The electro-magnetic levitation experimental apparatus as recited in claim 5, further comprising a connection base (12), wherein the field core (2) is connected to the mounting frame through the connection base (12).
7. The electro-magnetic levitation experimental apparatus as claimed in claim 6, wherein a level (1) is arranged on the connecting base (12).
8. The electro-magnetic levitation experimental apparatus as recited in claim 6 or 7, wherein a plurality of leveling foot pads (6) are further provided at the bottom of the mounting frame.
9. The electro-magnetic levitation experimental apparatus as recited in any one of claims 1-4, wherein the position sensor (3) is an eddy current displacement sensor.
10. The electro-magnetic levitation experimental apparatus as recited in claim 5, wherein a sample holder (7) is further disposed on the mounting frame between the excitation core (2) and the lifting mechanism (4), and the sample holder (7) is used for carrying a distance measuring disc for testing the output characteristics of the position sensor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921080198.3U CN210466940U (en) | 2019-07-11 | 2019-07-11 | Electric excitation magnetic suspension experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921080198.3U CN210466940U (en) | 2019-07-11 | 2019-07-11 | Electric excitation magnetic suspension experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210466940U true CN210466940U (en) | 2020-05-05 |
Family
ID=70445481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921080198.3U Active CN210466940U (en) | 2019-07-11 | 2019-07-11 | Electric excitation magnetic suspension experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210466940U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630708A (en) * | 2020-12-15 | 2021-04-09 | 中车株洲电机有限公司 | Electromagnet eddy current test device and method |
| CN113899432A (en) * | 2021-09-30 | 2022-01-07 | 武汉大学 | Magnetic suspension balance and mass measurement method |
-
2019
- 2019-07-11 CN CN201921080198.3U patent/CN210466940U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630708A (en) * | 2020-12-15 | 2021-04-09 | 中车株洲电机有限公司 | Electromagnet eddy current test device and method |
| CN112630708B (en) * | 2020-12-15 | 2022-09-23 | 中车株洲电机有限公司 | Electromagnet eddy current test device and method |
| CN113899432A (en) * | 2021-09-30 | 2022-01-07 | 武汉大学 | Magnetic suspension balance and mass measurement method |
| CN113899432B (en) * | 2021-09-30 | 2023-11-21 | 武汉大学 | Magnetic suspension balance and mass measurement method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7859157B2 (en) | Magnetic levitation system | |
| CN210466940U (en) | Electric excitation magnetic suspension experimental device | |
| CN107076604B (en) | Balance with a free-floating weighing pan | |
| CN101357096B (en) | Operating table | |
| CN102072790A (en) | Device for measuring micro impulse | |
| US20130037689A1 (en) | Device for Damping of Pendular Movements and Method of Using Same | |
| US20210116344A1 (en) | Measuring system, measuring arrangement and method for determining measuring signals during a penetration movement of a penetration body into a surface of a test body | |
| US2856238A (en) | Method and means for suspension of a rotatable object in space | |
| JP2009527207A (en) | Levitating equipment | |
| CN208012526U (en) | Adjustable portable measuring microscope | |
| US6799462B1 (en) | Gravimetric measurement method and system | |
| CN112762795B (en) | Brinell hardness indentation diameter measurement auxiliary device | |
| CN110376274A (en) | A kind of magnetic suspension detection method and device of the shrinkage cavity defect of aluminum alloy part | |
| DE102018210216B4 (en) | Weighing device | |
| US20220181054A1 (en) | Magnetic levitation apparatus and measurement apparatus using the same | |
| CN109596299B (en) | Vertical and horizontal dual-purpose vibrating table | |
| Pinot et al. | Static phase improvements in the LNE watt balance | |
| CN103063278B (en) | Space mass measurement device by utilizing sensing property of ferromagnetic droplets in gradient magnetic field | |
| JP2003075290A (en) | Oscillatory balance for wind tunnel experiment | |
| JP3760181B2 (en) | Drag calibration method in magnetic support balance device | |
| CN211149875U (en) | Magnetic suspension weighing demonstration mechanism | |
| JP2003262547A (en) | Electronic balance | |
| CN114527298B (en) | Active/passive vibration suppression fusion nano platform | |
| CN117711247A (en) | Novel magnetic suspension experiment device | |
| CN210896138U (en) | Boer resonance experimental instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |