Slow-ascending and slow-descending magnetic suspension display stand

Abstract

The utility model discloses a slow-ascending and slow-descending magnetic suspension display stand, which realizes automatic slow ascending and slow descending of a suspension body through PWM (Pulse Width Modulation) gradual change control of an electromagnetic coil group, and avoids power-off impact. The wireless power supply module is used for continuously supplying power to the suspension body, and a built-in battery is not needed; the Hall sensor and the deviation rectifying coil detect and adjust the position of the suspension body in real time, and stable suspension is ensured. The device solves the problems of inconvenient power supply, complex operation and poor stability of the existing magnetic suspension equipment, and is suitable for small night lamps, commodity display and other scenes.

Description

Technical Field

[0001] This utility model relates to the field of magnetic levitation technology, and in particular to a magnetically levitation display platform with slow ascent and descent. Background Technology

[0002] Currently, magnetic levitation display devices or nightlights have the following technical problems:

[0003] The suspended object needs to be powered by a built-in battery, which has limited battery life and requires frequent battery replacements.

[0004] The lifting and lowering of the levitation body depends on manual placement or removal, which is inconvenient.

[0005] When the power is off, the suspended body will directly impact the base due to gravity, which can easily cause damage.

[0006] The levitation process lacks stability and requires manual intervention for adjustment.

[0007] Existing technologies have failed to effectively solve the above problems, therefore there is an urgent need for a magnetic levitation device with automatic gradual ascent and descent, wireless power supply, and stable levitation. Summary of the Invention

[0008] In order to overcome the shortcomings of the prior art, this application proposes a slowly rising and falling magnetic levitation display platform to solve the problems existing in the prior art.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0010] A magnetically levitated display platform with gradual ascent and descent includes a base and a levitation body. The base is equipped with a magnetic levitation module, a wireless power supply module, a correction module, and an LED light-emitting module. The magnetic levitation module includes an electromagnetic coil group, a relay, and a microcontroller. The wireless power supply module includes an NE555 pulse generator, a transmitting coil L1, and a receiving coil L2. The correction module includes a Hall sensor, a comparator, and a correction coil.

[0011] As a further technical solution of this utility model: the electromagnetic coil group consists of 8 electromagnetic coils, which are connected to a microcontroller. The microcontroller controls the current of the electromagnetic coils to gradually increase or decrease at 500ms intervals to realize the slow rise or slow fall of the levitated body.

[0012] As a further technical solution of this utility model: In the wireless power supply module, the NE555 pulse generator outputs a 50kHz high-frequency pulse to the transmitting coil L1, and the receiving coil L2 senses the magnetic field and converts it into electrical energy, which is then regulated by the 78L05 to power the LED module in the levitation body.

[0013] As a further technical solution of this utility model: In the correction module, the Hall sensor detects the magnetic field of the suspended body and generates an electrical signal. After being processed by the LM324 comparator and the CD4066 analog switch, the signal drives the push-pull amplifier circuit to control the correction coil to work and pull the suspended body back to the center position.

[0014] As a further technical solution of this utility model: a permanent magnet is provided at the bottom of the levitation body, which forms a dynamic balance with the electromagnetic force generated by the electromagnetic coil group of the base, thereby achieving contactless levitation.

[0015] As a further technical solution of this utility model: the microcontroller is model SN8P2711B, which controls the current of the electromagnetic coil through PWM duty cycle variable technology, so that the lifting speed of the levitation body is ≤5mm / s.

[0016] As a further technical solution of this utility model: the base is equipped with a relay, which disconnects after a 2-second delay when the power is off, ensuring that the suspended body completely lands on the surface of the base.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0018] 1. Wireless power supply: The levitation body does not require a built-in battery. It is continuously powered by electromagnetic induction, providing unlimited battery life and being environmentally friendly.

[0019] 2. Gradual ascent and descent: The electromagnetic coil current gradually changes to control the ascent and descent speed of the suspended body, avoiding manual operation and impact from power failure;

[0020] 3. Stable Suspension: Hall sensors and correction coils correct deviation in real time to ensure dynamic balance of the suspended body;

[0021] 4. Low noise and long lifespan: Non-contact operation reduces friction and improves equipment reliability. Attached Figure Description

[0022] Figure 1 This is the motherboard circuit schematic;

[0023] Figure 2 This is a schematic diagram of a magnetic induction electromagnetic coil;

[0024] Figure 3 This is a schematic diagram of wireless power supply.

[0025] Figure 4 This is a flowchart illustrating the process of this utility model. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1, as Figure 1-4 As shown, a slowly rising and falling magnetic levitation display platform includes magnetic levitation, wireless charging, an electromagnetic coil, a wireless power supply module, and an LED light-emitting module.

[0028] 1. Magnetic levitation;

[0029] Working principle:

[0030] Magnetic levitation display stands are based on electromagnetic levitation technology. By configuring the space appropriately to make the direction of the electromagnetic force opposite to the direction of gravity, and by changing the power supplied by the high-frequency source to make the electromagnetic force equal to the gravitational force, electromagnetic levitation can be achieved. A magnetic levitation display stand typically consists of three parts: a base, a levitation element, and a power cord. The base contains the magnetic levitation system, and the levitation element contains a matching magnet.

[0031] Classification:

[0032] Magnetic levitation display stands can be divided into two types based on their levitation principle: downward levitation and upward levitation.

[0033] Suspension: The base is located above, and the exhibit is suspended below. It utilizes the principle of magnetic attraction; the magnetic attraction balances with Earth's gravity, causing the exhibit to levitate. The suspended weight is generally under 500g, suitable for displaying lightweight goods such as mobile phones, cigarettes, and models.

[0034] Suspension: The base is located below, and the exhibit is suspended above. It utilizes the principle of magnetic repulsion; the repulsive force of the magnets balances the Earth's gravity, causing the exhibit to levitate. Suitable for displaying heavier goods, such as wine and footwear.

[0035] In summary, the magnetic levitation display stand utilizes advanced electromagnetic levitation technology to achieve contactless levitation display of items. It features low noise, stable levitation, and creative display capabilities, making it suitable for various product display needs. During use, attention should be paid to power management and avoiding frequent contact with the suspended objects to ensure the normal operation and safety of the equipment.

[0036] 2. Wireless charging module:

[0037] Wireless charging technology is a non-contact energy transfer method.

[0038] 3. Electromagnet module:

[0039] Utilizing PWM variable duty cycle technology, the electromagnet of the base gradually strengthens its magnetism, causing the suspended magnet to rise and separate from the base, hovering in the air after reaching a certain distance. When it needs to be turned off, the electromagnet of the base gradually weakens its magnetism, causing the suspended object to gradually descend until its bottom surface contacts the surface of the display stand, where it is stably placed.

[0040] 4. Wireless power supply module: Figure 3 This is the circuit diagram of a wireless power supply module. The upper part of the diagram, consisting of the NE555 and surrounding components, forms a pulse generator. The parameters in the diagram ensure that the output pulse frequency is 50kHz. The frequency can be adjusted according to the inductance of the coil to achieve the maximum output power. The pulse frequency calculation formula is: f = 0.693 * RP1 * C7. The output PWM pulse is fed to the inductor coil L1, which converts the electric field into a magnetic field.

[0041] Figure 3 The lower half is the wireless power supply receiver module. The inductor coil L2 converts the magnetic field into electrical energy, which is then used to charge capacitors EC and C1 through D2. After filtering, the voltage is regulated by 78L05 and output to power the LED. Resistor RLED acts as a current limiter.

[0042] The main circuit board consists of two modules: a correction coil and a Hall sensor. When the suspended body deviates, the Hall sensor detects the deviation and generates electrical signals of different intensities according to the magnitude of the deviation. After being processed by U1 (LM324A), U2 (LM324B), and U3 (CD4066), the signals are sent to the corresponding deviation correction unit 1 or deviation correction unit 2. Through push-pull output, the corresponding correction coil is activated to pull the suspended body back to the center position.

[0043] The electromagnetic coil and the wireless power supply motherboard are independent of each other, and their functions are as follows:

[0044] A): Function of the electromagnetic coil:

[0045] When powered on, one path supplies power to the relay. Since the relay is not driven, there is no current in the electromagnetic coil, and the electromagnetic coil does not generate magnetism. The other path supplies power to IC SN8P2711B after being regulated by 78L05, causing pin 6 of IC to output a low level, driving the relay to conduct. Subsequently, pins 2, 3, 4, 7, 8, 10, 11, and 12 output low levels sequentially at 500ms intervals, causing Q1 to Q8 to conduct sequentially at 500ms intervals. Since the electromagnetic coils are connected end to end, the current in each coil gradually increases according to the same pattern, and the magnetism gradually strengthens. During the process of increasing magnetism, the levitated body is slowly lifted.

[0046] When the levitation body is not needed, press the BMKEY button. When pin 13 of SN8P2711 receives a low-level signal, pins 2, 3, 4, 7, 8, 10, 11, and 12 will output high-level signals sequentially at 500ms intervals, causing Q1 to Q8 to gradually turn off sequentially at 500ms intervals, gradually reducing the current flowing through the inductor coil until the current disappears. After pins 2, 3, 4, 7, 8, 10, 11, and 12 have all output low-level signals, there is a 2-second delay before pin 6 outputs a high-level signal, turning off Q9, disconnecting the relay, and disconnecting the power supply.

[0047] B): Wireless power supply function:

[0048] The NE555 and the peripheral circuit together form a high-frequency current pulse generator. The high-frequency current pulse is output from pin 3 to the inductor L1. L1 converts the high-frequency current pulse into a high-frequency magnetic field. L2 then converts the high-frequency magnetic field into a high-frequency current. The high-frequency current is filtered by a capacitor and regulated by a 78L05 to power the LED, making the levitated body light up.

[0049] Working principle: The circuit is powered by DC 12V.

[0050] 1) Connecting the emitters (E) of NPN transistor Q6 and PNP transistor Q7 forms a push-pull amplifier, with transistors Q66 and Q77 acting as the preamplifiers for Q6 and Q7, respectively. In the schematic below, Q66, Q77, Q6, and Q7 form a push-pull amplifier unit, with the emitters of Q6 and Q7 serving as output port P1. Similarly, Q5, Q8, Q55, and Q88 form another push-pull amplifier unit, with the emitters of Q5 and Q8 serving as output port P2. Two identical electromagnetic coils T1 and T2 are connected in series between ports P1 and P2, forming a levitation magnet correction (deflection and pull-back) unit U1. Likewise, Q2, Q4, Q1, Q3, Q22, Q44, Q11, Q33, and T343 form another levitation magnet correction unit U2.

[0051] 2) After power-on, the 12V power supply first outputs 5V through U3 for regulation, powering the microcontroller U2. Pin 6 of U3 drives the relay to conduct, connecting the 12V power supply to the switching transistors Q1~Q8. Simultaneously, pins 2, 3, 4, 7, 8, 10, 11, and 12 output low-level signals sequentially at 500ms intervals, causing Q1~Q8 to gradually conduct, gradually increasing the current through the eight electromagnetic coils, thus propelling the levitation body to rise gradually. An iron rod is inserted in the middle of the electromagnetic coils to increase magnetism.

[0052] 3) Power off via KEY: When the KEY is pressed, pins 2, 3, 4, 7, 8, 10, 11, and 12 of the microcontroller output high levels sequentially at 500ms intervals. This causes Q1~Q8 to gradually turn off sequentially at 500ms intervals, gradually reducing the current in the electromagnetic coil and decreasing its magnetism. The suspended object slowly descends to the bottom and contacts the stable display platform, avoiding a strong impact. Then, the signal driving the relay on pin 6 turns off, causing the relay switch to open and completely cutting off the power to the entire device.

[0053] 4) After the levitation body is raised after being powered on, the entire levitation body is in a dynamic equilibrium state: When the levitation body shifts to the left or right, the magnetic field of the levitation body shifts. The Hall sensor U4G detects the shifted magnetic field and outputs an electrical signal to the inverting input terminal of pin 6 of the comparator LM324A. Pin 7 outputs a low level, which is sent to pin 3 of the analog switch CD4066. Pin 4 of CD4066 outputs a low level. This low level signal is split into two paths. One path is sent to the common terminal of Q11 and Q33, and the other path returns to pin 13 of the inverting input terminal of LM324A, causing pin 14 of LM324 to also output a high level, turning on Q33 and driving Q3 to turn on. This signal also makes pin 3 of the inverting input terminal of LM324A low level, and pin 1 of LM324A outputs a low level, pulling back Q22 of unit U2 to turn on, and Q2 turns on. At this point, Q2 and Q3 are conducting, forming a circuit through T3 and T4. The coil generates magnetism, pulling the displaced levitation body back to the center position. Similarly, when the levitation body shifts forward or backward, the electromagnetic coil of the pull-back unit U1 pulls the displaced levitation body back to the center position. This process repeats continuously.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A magnetic levitation display platform with slow ascent and slow descent, comprising a base and a levitation body, characterized in that: The base is internally provided with a magnetic suspension module, a wireless power supply module, a deviation correction module and an LED light emitting module; the magnetic suspension module comprises an electromagnetic coil group, a relay and a single-chip microcomputer, the wireless power supply module comprises an NE555 pulse generator, a transmitting coil L1 and a receiving coil L2, and the deviation correction module comprises a Hall sensor, a comparator and a deviation correction coil.

2. The magnetic levitation display platform according to claim 1, characterized in that, The electromagnetic coil group is composed of 8 electromagnetic coils and is connected with the single-chip microcomputer, the single-chip microcomputer controls the electromagnetic coil current to gradually increase or decrease at an interval of 500 ms, so as to realize the slow lifting or slow descending of the suspension body.

3. The magnetic levitation display platform of slow-rising and slow-falling according to claim 1, characterized in that, In the wireless power supply module, the NE555 pulse generator outputs a 50 kHz high-frequency pulse to the transmitting coil L1, the receiving coil L2 senses a magnetic field and converts it into electric energy, and the electric energy is stabilized by a 78L05 voltage stabilizer and then is used to supply power to the LED module in the suspension body.

4. The magnetic levitation display platform of gradual increase and decrease according to claim 1, characterized in that, In the deviation correction module, the Hall sensor detects the deviation of the suspension body from a magnetic field and generates an electric signal, the electric signal is processed by an LM324 comparator and a CD4066 analog switch, and then a push-pull amplification circuit is driven to control the deviation correction coil to work, so as to pull the suspension body back to the center position.

5. The magnetic levitation display platform according to claim 1, wherein, The suspension body is provided with a permanent magnet at the bottom, and the electromagnetic force generated by the electromagnetic coil group of the base forms a dynamic balance with the permanent magnet, so as to realize the non-contact suspension.

6. The magnetic levitation display platform according to claim 1, wherein, The single-chip microcomputer is of SN8P2711B type, and the electromagnetic coil current is controlled by a PWM duty cycle variable technology, so that the lifting speed of the suspension body is ≤5 mm / s.

7. The magnetic levitation display platform according to claim 1, wherein, The base is provided with a relay, and the relay is delayed for 2 seconds to be disconnected when power is off, so as to ensure that the suspension body completely lands on the surface of the base.

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