CN2618366Y - Multifunctional magnetic suspension devices - Google Patents
Multifunctional magnetic suspension devices Download PDFInfo
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- CN2618366Y CN2618366Y CN 03221875 CN03221875U CN2618366Y CN 2618366 Y CN2618366 Y CN 2618366Y CN 03221875 CN03221875 CN 03221875 CN 03221875 U CN03221875 U CN 03221875U CN 2618366 Y CN2618366 Y CN 2618366Y
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Abstract
The utility model relates to a multifunctional magnetic levitation device, wherein, a bracket is arranged on a base to support an electromagnetic box, and an electromagnet is arranged in the electromagnetic box so that a suspended substance can be arranged under the electromagnetic box; the utility model is characterized in that a sensor is arranged under the electromagnet, and a permanent magnet is arranged on top of the suspended substance. As the suspended substance can be controlled by a single point controlling method on the same electromagnet, the structure of the device is optimized as well as the control circuit is simplified. An adjusting knob arranged on the exterior of the device is used to adjust the distance between the suspended substance and the electromagnet within a certain range. The utility model can be used as a combined apparatus for experiments in education and research as well as for presentation equipments. According to different requirements, not only the shape of the electromagnetic box but also the suspended substance can be arranged into a plurality of different combinations to achieve a plurality of functions in order to inspire users for direct participating as well as increase interactions result.
Description
Technical field:
The utility model belongs to electromagnetic application and automatic control technology field, particularly relates to magnetic levitation system.
Background technology:
At present domestic to the existing a lot of researchs of magnetic suspension.A kind of magnetic levitation system that China Patent No. ZL99252312.5 introduces is to be placed permanent magnet by the upper and lower end face of levitated object, and support upper ends electromagnet is placed two transducers and a deflecting force generator on the base.This device is owing to adopt being controlled at two ends up and down by suspended matter, and circuit structure complicated and device is restricted.
A kind of magnetic levitation ball device that China Patent No. ZL00251936.4 introduces is to place electromagnet at a top of the trellis, and drive magnet is installed on the base, also is to be placed magnetic conductor by the upper and lower side of suspended matter, and transducer is placed on the both sides of spheroid." automation and instrument " the 16th volume calendar year 2001 the 1st interim " magnetic levitation ball Study of fuzzy control system " literary composition has been done detailed argumentation theoretically for the control of the magnetic levitation system of this structure.But this structure exists circuit structure complicated and device to be controlled the problem of the restriction of mode equally.
Similar patent is abroad also arranged, and its structure and principle and above-mentioned patent are similar substantially.
More than device is all taked two ends control up and down, though object is suspended in the air, the structure of device is controlled mode and limits; Having relatively high expectations in installation site for magnet and transducer, when there is error the installation site, know from experience is produced vibration, deflection by suspended matter even come off; In case after the said apparatus Installation and Debugging were good, it was by the just fixing conversion arbitrarily of suspended matter, function singleness; And it adopts a plurality of control points, and used electronic devices and components are more, and circuit is complicated, and power consumption is big.
Technology contents:
The utility model proposes a kind of multifunctional maglev device, adopt the single-point control mode to control, with structure, the simplified control circuit of optimization means and realize multi-functional by suspended matter.
The utility model multifunctional maglev device, the support (2) that supports electromagnetism box (5) is installed on base (1), be equipped with electromagnet (6) in this electromagnetism box (5), placed under the electromagnetism box (5) by suspended matter (3), adjusting knob (8) and control circuit (9) are placed on the base (1); It is characterized in that:
Transducer (4) is installed in the bottom of electromagnet (6), and permanent magnet (7) is installed in by the top of suspended matter (3);
Described control circuit (9) can adopt the basic circuit that comprises circuit for signal conditioning (201), negative-feedback circuit (202) and power amplification circuit (203) to realize the most basic control: the output of transducer (4) is connected to the input (P1) of circuit for signal conditioning (201), the output of circuit for signal conditioning (201) is connected to the input of negative-feedback circuit (202), the output of negative-feedback circuit (202) is connected to power amplification circuit (203), and the output of power amplification circuit (203) (P3, P4) is connected to electromagnet (6);
Described adjusting knob (8) is connected with the adjustable side (P2) of regulating resistor (Rx) in the control circuit (9).
During use, energized, electromagnet (6) produces electromagnetic force, attract permanent magnet (7) to be suspended under the electromagnetism box (5) by suspended matter (3), adjusting knob (8) by the adjustable side (P2) of regulating resistor (Rx) in the control circuit (9) regulate flow through electromagnet (6) thus in the coil size of electric current with the size change suspended matter (3) and the distance between the electromagnet (6) of control magnetic force and adapt to Different Weight by suspended matter (3); When by the variable in distance between suspended matter (3) and the electromagnet (6), the output signal of transducer (4) and then changes, electric current by electromagnet (6) is changed thereupon, changed round about by the distance between suspended matter (3) and the electromagnet (6) and finally tend to balance thereby force.
The utility model adopts the bottom that transducer (4) is installed in electromagnet (6), permanent magnet (7) is contained in by the mode on the top of suspended matter (3) and controls by suspended matter, because transducer (4) and electromagnet (6) are installed together, can utilize and be located automatically by the gravity of suspended matter and tend towards stability, the place that need not beyond electromagnet is provided with the control point, thereby control circuit of the present utility model can be comparatively simple.The utility model is installed together transducer (4) and electromagnet (6) and realize having optimized control circuit to by the control of the single-point of levitated object, has simplified the structure of device and has reduced cost.Because the utility model is placed on the outside of device with adjusting knob, can be regulated by the distance between suspended matter and the electromagnet; Can the suspend object of Different Weight, shape etc. of same device can be realized multiple function; After the utility model is made, it is replaceable by suspended matter, can utilize the utility model device support, base, electromagnetism box shape and done multiple conversion combination by levitated object, make science and education experiment, demonstration equipment as basic framework, workmanship, novel suspension toy, suspension tellurion+desk lamp+multiple products such as composite set such as clock+penholder; The user can be according to the interest arbitrary objects that suspends, thereby has increased mystique, can bring out people's curiosity, can excite the user to participate in directly, increases interaction effect, excites its aspiration to knowledge, gives beautiful enjoyment.
Description of drawings:
Fig. 1 is the structural representation of the utility model multifunctional maglev device;
Fig. 2 is the theory diagram of control circuit.
Fig. 3 is the specially designed a kind of control circuit that comprises current feedback and distance feedback of the present invention;
Fig. 4 is a kind of concrete control circuit that embodiment 2 adopts;
Fig. 5 is a kind of control circuit that embodiment 3 adopts.
Embodiment:
Embodiment 1: the multifunctional maglev device
The multifunctional maglev device of present embodiment is as shown in Figure 1: base (1) is a hollow base, control circuit (9) is installed in its bottom, support (2) is installed on the base (1), electromagnetism box (5) is suspended on the support (2), settle electromagnet (6) in the electromagnetism box (5), transducer (4) is installed in the bottom of electromagnet (6), and support (2) is a hollow sting; The electric wire of control circuit (9) from the central duct of support (2) by linking to each other with transducer (4) with electromagnet (6), adjusting knob (8) is installed on the base (1), and the adjustable side (P2) of the regulating resistor (Rx) in adjusting knob (8) and the control circuit shown in Figure 3 links to each other; Wherein electromagnetism box (5) is made with stainless steel, and electromagnet (6) is for including the square electromagnet of pure iron cuboid iron core; Selected for use permanent magnet (7) to be fixed in the present embodiment by the top of suspended matter (3) with rectangular shape; By suspended matter (3) can be according to the parameter of selected element particularly electromagnet parameter and object in the definite constant weight scope is for example selected earth model for use, permanent magnet (7) can be bonded at the inner upper end of earth model;
Control circuit in the present embodiment (9) has adopted and has specially designedly a kind ofly comprised current feedback and apart from the control circuit of feedback circuit, as shown in Figure 3:
The output of transformer (T1) is connected to the input of bridge-type ballast unit (D1), the output of bridge-type ballast unit (D1) by filter capacitor (C1) filtering after as the DC power supply (VCC) of supplying with entire circuit and be connected to the input of voltage regulation unit (IC9), voltage regulation unit (IC9) outputs to transducer (IC8), two outputs of transducer (IC8) are connected respectively to the positive terminal of amplifier (IC1) and amplifier (IC2) by resistance (R1) and resistance (R2), the output of amplifier IC1 is connected to the positive terminal of amplifier (IC3) by resistance (R6), the output of amplifier (IC2) is by resistance (R7, R8) be connected to the negative phase end of amplifier (IC3), wherein three amplifier (IC1, IC2, IC3) constitute the homophase differential amplifier jointly; The two ends of the fixed resistance value of regulating resistor (Rx) connect DC power supply (VCC) and power supply ground respectively, the normal phase input end of amplifier (IC4) is received in its adjustable side (P2) by resistance (R26), the output of amplifier (IC4) is connected to the negative phase end of amplifier (IC3) by resistance (R25) and resistance (R8), amplifier (IC3) normal phase input end links to each other with its output by resistance R 35, the output of amplifier (IC3) is connected to the normal phase input end of amplifier (IC6) by resistance (R9), the output of amplifier (IC6) is connected to the base stage of triode (Q1) by resistance (R14), the emitter of triode (Q1) is by resistance (R17) ground connection, and its collector electrode connects power supply (VCC) by resistance (R15) through resistance (R16); The drain electrode of field effect transistor (Q2) connects power supply (VCC), and its grid is connected between resistance (R15) and the resistance (R16), and the coil (L) of source electrode (S) and electromagnet (6) links to each other; The plus earth of diode (D2), negative pole connects the source electrode (S) of field effect transistor (Q2), it is in parallel after light-emitting diode (D4) and diode (D3) reverse parallel connection, electric capacity (C3) and resistance (R33) are connected with light-emitting diode (D4) and diode (D3) with diode (D2); The source electrode (S) of electromagnet (6) coil (L) termination field effect transistor (Q2), the other end is received resistance (R31) and resistance (R32), the other end ground connection of resistance (R32), the other end of resistance (R32) is connected to the normal phase input end of amplifier (IC5), amplifier (IC5)) output be connected to resistance R 23 and resistance R 24; Again and resistance (R23) parallel connection, be connected to the reverse input end of amplifier (IC6) through resistance (R11) after the series connection of resistance (R24) and electric capacity (C2); The two ends of adjustable resistance (R20) fixed resistance value connect DC power supply (VCC) and power supply ground respectively, and the normal phase input end of amplifier (IC7) is received in the adjustable side, and amplifier (IC7) output is connected to the inverting input of amplifier (IC6) through resistance (R13); Resistance (R3) two ends connect amplifier (IC1) output and inverting input respectively, resistance (R4) two ends connect big device (IC2) output and inverting input respectively, resistance (R5) two ends connect big device (IC1) respectively and connect big device (IC2) inverting input, resistance (R28) two ends connect big device (IC4) output and inverting input respectively, resistance (R29) two ends connect big device (IC5) output and inverting input respectively, and resistance (R12) two ends connect big device (IC7) output and inverting input respectively; Described adjusting knob (8) is connected with the adjustable side (P2) of regulating resistor (Rx) among control circuit (9) Fig. 3.
In the present embodiment, the parameter of each electronic component is respectively, T1:220/17V; D1:2A 100V; C1:2200U/36, C2:0.051U, C3:10U/36; IC1～IC7:LM324, IC8:THS103A type HALL element, IC9:LM7805; R1～R14, R20, R21, R25, R26, R28, R31:10K Ω; R15, R16, R33:1K Ω; R17:220 Ω; R23:270K Ω; R20, R24, Rx, R29:100K Ω; R32:0.33 Ω; R35:10K; Q1:5551; Q2:IRF9540; D2:MUR1010; D3:4148; D4:LED; L:2000T 0.27D, iron core: 20 * 20 * 40mm; VCC:DC17V3A; Under these conditions, the gross mass that is added permanent magnet (7) by suspended matter (3) can be 100～400 grams.
Present embodiment adopts and to comprise Current Negative Three-Point Capacitance and apart from the control circuit of negative-feedback circuit, after alternating current passes through bridge-type ballast and voltage stabilizing, become low-voltage DC and supply with entire circuit, transducer (IC8) is to being converted to the signal of telecommunication by the magnetic induction of permanent magnet (7) in the suspended matter (3), through the differential operational circuit (IC1 that is in parallel together, IC2, IC3) output to amplifier (IC6), be amplified to the electric current that field effect transistor (Q2) control flows is crossed electromagnet coil (L) through triode (Q1), the electric current of electromagnet coil (L) flows through ratio circuit (IC5), pass through amplifier (IC6) again and relatively be amplified to the electric current that amplifier (IC2) is controlled electromagnet coil (L) by triode (Q1) in the back, when being changed by the distance between suspended matter (3) and the electromagnet (6), transducer (IC8) is transformed into the signal of telecommunication with its distance increment, by the electric current of circuit controling line circle (L), thereby keep by the balance of suspended matter; Wherein, (IC4 IC7) is the circuit that is used to regulate by suspended matter and electromagnet distance to circuit, regulates distance and balance between suspended matter and the electromagnet by regulating resistance (R20) and regulating resistor (Rx).Described adjusting knob (8) links to each other with the adjustable side (P2) of regulating resistor (Rx) among control circuit (9) Fig. 3; The present embodiment device according to by the weight of suspended matter, is regulated resistance (R20) and knob (8) among Fig. 3 earlier when mounted, makes suspended matter (3) and electromagnet reach granitational equilibrium, and after this resistance (R20) generally just needn't be transferred again.
During use, regulate by the distance between suspended matter and the electromagnet by adjusting knob (8), stir suspended matter gently, suspended matter will rotate continuously, and the present embodiment device just becomes a multifunctional maglev device.According to the above-mentioned parameter of selected element, being added permanent magnet (7) gross mass by suspended matter (3) and can in 100～400 gram weight scopes, choose in the present embodiment; Described base (1), support (2) and electromagnetism box (5) also can adopt other structure and different mutual alignment relations, thereby can embody different functions.
Owing to adopted electric current and apart from feedback circuit, feedback speed is very fast, be easy to keep in the present embodiment by the suspended matter balance; Can adopt light-emitting diode (LED) to show its operating state; If adopt square electromagnet, can be rotated automatically by levitated object, then need not rotating driving device.
Embodiment 2: the electromagnetism experiment instrument
In the present embodiment, apparatus structure is with embodiment 1: transducer (4) is installed in the bottom of electromagnet (6), by the top of suspended matter (3) permanent magnet is housed, thereby realizes the single-point control mode.Control circuit is installed in base (1) bottom, support (2) is installed on the base (1), support (2) supports electromagnetism box (5), settle electromagnet (6) in the electromagnetism box (5), transducer (4) is installed in the bottom of electromagnet (6), support (2) is a hollow sting, the electric wire that passes through of control circuit links to each other with transducer (4) with electromagnet (6), electric wire passes through from support (2) center, adjusting knob (8) is installed on the base (1), and adjusting knob (8) links to each other with the adjustable side (P2) of regulating resistor shown in Figure 4 (Rx); Wherein electromagnetism box (5) is made with engineering plastics, and electromagnet is for including cylinder pure iron iron core cylinder, and the magnet spool number of turns and line footpath are certain; The shape of permanent magnet (7) is selected oblate cylinder, and suspended matter (3) is the counterweight of constant weight, and permanent magnet (7) and suspended matter (3) stick together by magnetic force, and adjusting knob (8) is suspended in the air suspended matter reposefully.
The control circuit of present embodiment (9) adopts physical circuit shown in Figure 4 to realize: the output of transducer (4) is connected to the normal phase input end of amplifier (IC1) by terminals (T0), and the negative-phase input of amplifier (IC1) links to each other with the output of amplifier (IC1); Regulating resistor (Rx) end ground connection, the other end is connected to the normal phase input end of amplifier (IC2), resistance (R2) termination power (VCC), the other end is connected to the normal phase input end of amplifier (IC2), and the negative-phase input of amplifier (IC2) links to each other with the output of amplifier (IC2); The negative-phase input of amplifier (IC3) is by resistance (R3), and the normal phase input end of amplifier (IC3) connects the output from amplifier (IC2), and the negative-phase input of amplifier (IC3) links to each other with the output of amplifier (IC3) by resistance (R4); The output of resistance (R5) and electric capacity (C1) back in parallel one termination amplifier (IC3), the normal phase input end of another termination amplifier (IC4), the normal phase input end of resistance (R10) termination amplifier (IC4), other end ground connection; The negative-phase input of amplifier (IC4) is by resistance (R9) ground connection, and resistance (R6) two ends connect the negative-phase input and the output of amplifier (IC4) respectively; The base stage of triode (Q1) is connected to the output of amplifier (IC4) by resistance (R7), the grounded emitter of triode (Q1), the collector electrode of triode (Q1) are connected to the positive terminal of solenoid (L), diode (D1) and the negative phase end of light-emitting diode (D2) respectively; Be connected to after diode (D1) and solenoid (L) parallel connection power supply (+VCC), light-emitting diode (D2) by resistance (R8) be connected to power supply (+VCC); The positive-negative power input of amplifier (IC1, IC2, IC3, IC4) be connected to respectively positive-negative power (+VCC ,-VCC); Positive supply (+VCC) by electric capacity (C2) ground connection, negative supply is (VCC) by electric capacity (C3) ground connection; Light-emitting diode (D3) positive terminal by resistance (R1) connect power supply (+VCC), negative phase end ground connection, light-emitting diode (D4) positive terminal ground connection, negative phase end connects power supply (VCC) by resistance (R12); Described adjusting knob (8) is connected with regulating resistor (Rx) adjustable side (P2) among control circuit (9) Fig. 4.
Respectively at amplifier IC1, IC2 input and output, the output of amplifier IC3, IC4 and inductance L two ends are provided with measurement point A1, A2, A3, A4, A5, A6, A7 and A8, and go up the relevant position at base shown in Figure 1 (1) and reserve measured hole, by measuring the electric weight of each measurement point, the variation of electric weight that can observe each measurement point is to by the influence of suspended matter, and the utility model is the electromagnetism experiment instrument just.This electromagnetism experiment instrument can be used for demonstrating and testing flowing into the current of electromagnet size to the magnetic field of electromagnet generation and the influence of attraction.
In the present embodiment, the parameter of each electronic component is respectively, R1, R12:1K Ω; R2:20 K Ω; R3:11K Ω; R4:100K Ω; R5:150K Ω; R6:370 K Ω; R7:300 Ω; R8:1K Ω; R9:1.5K Ω; R10:22K Ω; Rx:100K Ω; C2, C3:47uF; C1:0.1uF; Q1:2N3055; D2-D4:LED; D1:1N4001; IC1-4:LM741; The VCC:+ of+/-/-15V3A; L:1680T0.21D, iron core: Φ 20 * 30mm; Under these conditions, the gross mass that is added permanent magnet (7) by suspended matter (3) can be 100～300 grams; Transducer: OH004 type HALL element.
Embodiment 3: the magnetic suspension toy
In the present embodiment, base (1), support (2), electromagnetism box (5) are made as a whole hollow design, for example: the little dog model of squatting.Control circuit (9) is installed in its bottom, electromagnet (6) is installed in doggie in the mouth, transducer (4) is installed in the bottom of electromagnet (6), made bone shaped by suspended matter (3), permanent magnet (7) is installed in the suspended matter (3), during work, bone is suspended in below the mouth of doggie, and present embodiment just is the magnetic suspension toy that a doggie gnaws a bone; The curiosity that present embodiment magnetic suspension toy can bring out child, thus can excite its aspiration to knowledge.
In the present embodiment, control circuit (9) can adopt circuit shown in Figure 5 to realize: the output of transducer (4) is connected to the negative-phase input of amplifier (IC1) by terminals (B0) through resistance (R1), and the normal phase input end of amplifier (IC1) resistance (R2) respectively is connected to reference voltage (V
Ref) and by regulating resistor (Rx) ground connection, resistance (R
f) negative-phase input of a termination amplifier (IC1), the output of another termination amplifier (IC1); The output of resistance (R4) and electric capacity (C1) back in parallel one termination amplifier (IC1), the other end is connected to the base stage of triode (Q1) by resistance (R6), and regulating resistor (Rx) is connected between resistance (R4) and the resistance (R6), other end ground connection; The collector electrode of triode (Q1) is connected to the positive terminal of solenoid (L) and diode (D1) respectively, is connected to power supply (VCC), the grounded emitter of triode after solenoid (L) and diode (D1) parallel connection; Described adjusting knob (8) is connected with the adjustable side (P2) of regulating resistor (Rx) among control circuit (9) Fig. 5.
Claims (2)
1, a kind of multifunctional maglev device, the support (2) that supports electromagnetism box (5) is installed on base (1), be equipped with electromagnet (6) in this electromagnetism box (5), placed under the electromagnetism box (5) by suspended matter (3), adjusting knob (8) and control circuit (9) are placed on the base (1); It is characterized in that:
Transducer (4) is installed in the bottom of electromagnet (6), and permanent magnet (7) is installed in by the top of suspended matter (3);
Described control circuit (9) adopts and to comprise that circuit for signal conditioning (201), negative-feedback circuit (202) and power amplification circuit (203) realize the most basic control: the output of transducer (4) is connected to the input (P1) of circuit for signal conditioning (201), the output of circuit for signal conditioning (201) is connected to the input of negative-feedback circuit (202), the output of negative-feedback circuit (202) is connected to power amplification circuit (203), and the output of power amplification circuit (203) (P3, P4) is connected to electromagnet (6);
Described adjusting knob (8) is connected with the adjustable side (P2) of regulating resistor (Rx) in the control circuit (9).
2, multifunctional maglev device as claimed in claim 1, be characterised in that described control circuit (9) comprising: the output of transformer (T1) is connected to the input of bridge-type ballast unit (D1), the output of bridge-type ballast unit (D1) by filter capacitor (C1) filtering after as the DC power supply (VCC) of supplying with entire circuit and be connected to the input of voltage regulation unit (IC9), voltage regulation unit (IC9) outputs to transducer (IC8), two outputs of transducer (IC8) are connected respectively to the positive terminal of amplifier (IC1) and amplifier (IC2) by resistance (R1) and resistance (R2), the output of amplifier IC1 is connected to the positive terminal of amplifier (IC3) by resistance (R6), the output of amplifier (IC2) is by resistance (R7, R8) be connected to the negative phase end of amplifier (IC3), wherein three amplifier (IC1, IC2, IC3) constitute the homophase differential amplifier jointly; The two ends of the fixed resistance value of regulating resistor (Rx) connect DC power supply (VCC) and power supply ground respectively, its adjustable side (P2) connects the normal phase input end of amplifier (IC4) by resistance (R26), the output of amplifier (IC4) is connected to the negative phase end of amplifier (IC3) by resistance (R25) and resistance (R8), amplifier (IC6) normal phase input end links to each other with its output by resistance R 35, the output of amplifier (IC3) is connected to the normal phase input end of amplifier (IC6) by resistance (R9), the output of amplifier (IC6) is connected to the base stage of triode (Q1) by resistance (R14), the emitter of triode (Q1) is by resistance (R17) ground connection, and its collector electrode connects power supply (VCC) by resistance (R15) through resistance (R16); The drain electrode of field effect transistor (Q2) connects power supply (VCC), and its grid is connected between resistance (R15) and the resistance (R16), and the coil (L) of source electrode (S) and electromagnet (6) links to each other; The plus earth of diode D2, negative pole connects the source electrode (S) of field effect transistor (Q2), it is in parallel after light-emitting diode (D4) and diode (D3) reverse parallel connection, electric capacity (C3) and resistance (R33) are connected with light-emitting diode (D4) and diode (D3) with diode (D2); The source electrode (S) of electromagnet (6) coil (L) termination field effect transistor (Q2), the other end is received resistance (R31) and resistance (R32), the other end ground connection of resistance (R32), the other end of resistance (R32) is connected to the normal phase input end of amplifier (IC5), and the output of amplifier (IC5) is connected to resistance R 23 and resistance R 24; After resistance R 24 and electric capacity (C2) series connection again with resistance R 23 parallel connections, be connected to the reverse input end of amplifier (IC6) through resistance R 11; The two ends of adjustable resistance (R20) fixed resistance value connect DC power supply (VCC) and power supply ground respectively, and the normal phase input end of amplifier (IC7) is received in the adjustable side, and amplifier (IC7) output is connected to the inverting input of amplifier (IC6) through resistance (R13); Resistance (R3) two ends connect amplifier (IC1) output and inverting input respectively, resistance (R4) two ends connect big device (IC2) output and inverting input respectively, resistance (R5) two ends connect big device (IC1) respectively and connect big device (IC2) inverting input, resistance (R28) two ends connect big device (IC4) output and inverting input respectively, resistance (R29) two ends connect big device (IC5) output and inverting input respectively, and resistance (R12) two ends connect big device (IC7) output and inverting input respectively; The adjustable side (P2) of the regulating resistor (Rx) in described adjusting knob (8) and the control circuit (9) is connected.
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| CN 03221875 CN2618366Y (en) | 2003-05-14 | 2003-05-14 | Multifunctional magnetic suspension devices |
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| CN 03221875 CN2618366Y (en) | 2003-05-14 | 2003-05-14 | Multifunctional magnetic suspension devices |
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| CN103268725A (en) * | 2013-06-06 | 2013-08-28 | 雷建设 | High-voltage control magnetic suspension teaching demonstration instrument |
| CN104763865A (en) * | 2014-01-02 | 2015-07-08 | 天津华网畅达科技有限公司 | Magnetic suspension support of acupuncture point shooting and projecting device |
| CN108154765A (en) * | 2018-01-05 | 2018-06-12 | 宝鸡文理学院 | A kind of movement of falling object experimental provision |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103268725A (en) * | 2013-06-06 | 2013-08-28 | 雷建设 | High-voltage control magnetic suspension teaching demonstration instrument |
| CN104763865A (en) * | 2014-01-02 | 2015-07-08 | 天津华网畅达科技有限公司 | Magnetic suspension support of acupuncture point shooting and projecting device |
| CN111609870A (en) * | 2015-01-29 | 2020-09-01 | 万渡江 | Large-scale production method of micro-electromechanical system sensor |
| CN111609870B (en) * | 2015-01-29 | 2022-04-01 | 万渡江 | Large-scale production method of micro-electromechanical system sensor |
| CN108154765A (en) * | 2018-01-05 | 2018-06-12 | 宝鸡文理学院 | A kind of movement of falling object experimental provision |
| CN110030199A (en) * | 2019-03-29 | 2019-07-19 | 张则羿 | It is a kind of that the floating rotary system of aspiration-type magnetic is often led based on magnechuck |
| CN110671631A (en) * | 2019-09-04 | 2020-01-10 | 南京理工大学 | Round bar formula suspension desk lamp |
| CN112706556A (en) * | 2019-10-25 | 2021-04-27 | 辽宁轻工职业学院 | Magnetic suspension gourd handicraft |
| CN115487966A (en) * | 2022-10-14 | 2022-12-20 | 青岛宏泰金属制品有限公司 | Device is paintd to passivator for copper pipe processing |
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