Wireless energy transfer comprehensive experiment device and experiment method

Abstract

The invention belongs to the technical field of physical experiment equipment, and particularly relates to a wireless energy transfer comprehensive experiment device and experiment method.The wireless energy transfer comprehensive experiment device comprises a bottom plate, a large turntable with scales, a lead screw, a first bottom column, a second bottom column, a small dial, a transmitting coil assembly and a receiving coil assembly; the large turntable with the scales is mounted on the bottom plate and can rotate around the bottom plate by 360 degrees, and the first bottom column penetrates through a central through hole of the large turntable with the scales and is fixedly connected with the bottom plate; the lead screw is arranged on the large rotary disc with the scales, the second bottom column is connected to a sliding block of the lead screw, and the lead screw can drive the second bottom column to move within the range of 50 cm. By changing controllable factors in the experiment, the change of the studied physical quantities (such as mutual inductance coefficient, transmission efficiency and the like) along with the change of the changed parameters can be intuitively observed, so that an experimenter can better understand the physical principle.

Description

Technical Field

[0001] The present invention belongs to the technical field of physical experimental equipment, and in particular relates to a wireless energy transmission comprehensive experimental device and an experimental method. Background Art

[0002] In existing wireless energy transfer experimental setups for teaching and popularizing physics, two fixed coils are typically attached to linear slides. While the angles of the coils can be partially adjusted, these setups present significant limitations. For one thing, the inability to change the relative angle between the two coils significantly restricts experiments investigating the relationship between power transmission and angles. Furthermore, the inability to interchange coils of different specifications significantly hinders research into the impact of different coil properties on experimental results. Furthermore, existing setups offer limited experimental content, making it impossible to conduct comparative experiments on electromagnetic induction and electromagnetic resonance, making them difficult to meet the needs of both teaching and in-depth research.

[0003] Due to the above defects, the original technology can only change the linear relative distance and angle of the coil to conduct limited experiments during the experiment. Its modules and functions are relatively simple and its operability is low, which greatly limits the diversity and flexibility of the experiments. It cannot provide students and researchers with a comprehensive and in-depth experimental experience, and is not conducive to the understanding and research of knowledge related to electromagnetic induction and electromagnetic resonance. Summary of the Invention

[0004] The purpose of the present invention is to provide a wireless energy transmission comprehensive experimental device and experimental method to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a wireless energy transmission comprehensive experimental device, comprising a base plate, a large turntable with a scale, a lead screw, a first base column, a second base column, a small dial, a transmitting coil group and a receiving coil group; the large turntable with a scale is mounted on the base plate and can rotate 360° around the base plate, the first base column passes through the central through hole of the large turntable with a scale and is fixedly connected to the base plate; the lead screw is arranged on the large turntable with a scale, the second base column is connected to the slider of the lead screw, and the lead screw can drive the second base column to move within a range of 50 cm; the two small dials are fixed to the top of the first base column and the second base column by glue respectively and the centers are aligned; the transmitting coil group is pluggable and mounted in the central hole at the top of the first base column, and the receiving coil group is pluggable and mounted in the central hole at the top of the second base column; except for the glue bonding and plug-in connection parts, the other components are fixedly connected by screws; the transmitting coil group and the receiving coil group can both rotate 360° around their own axes The large dial with scale can rotate freely, and when the large dial with scale rotates, it can drive the lead screw, the second base column, the small dial and the receiving coil group to rotate 360 ​​degrees around the transmitting coil group.

[0006] Preferably, the transmitting coil assembly and the receiving coil assembly each include a central circular plate, a base for fixing the central circular plate, and first and second side plates arranged opposite each other; the central circular plate is used to fix the shape of the coil, the coil is sandwiched between the first and second side plates, and the center of the coil coincides with the center of the central circular plate; the bottom of the base is provided with a connecting portion adapted to the center hole at the top end of the first base column or the center hole at the top end of the second base column to enable plug-in installation of the transmitting coil assembly and the receiving coil assembly, and the base can rotate freely around its central axis.

[0007] Preferably, the coil is led out with two lead wires, and the first side panel and the second side panel are correspondingly provided with lead wire holes for the lead wires to pass through. The lead wires are led out from between the first side panel and the second side panel through the lead wire holes and are used to connect to an external signal generator, oscilloscope or load test equipment.

[0008] Preferably, a distance scale is provided on the lead screw for accurately indicating the linear movement distance of the receiving coil assembly relative to the transmitting coil assembly.

[0009] The present invention also discloses an experimental method for the wireless energy transmission comprehensive experimental device, including an electromagnetic induction experimental method and an electromagnetic resonance experimental method: Electromagnetic induction experiment method: Connect the two pins of the transmitting coil to a fixed-frequency AC power source, and the two pins of the receiving coil to an oscilloscope. Change at least one of the structural parameters, relative angle, center position, and coil spacing of the transmitting and receiving coils. Based on the definition of mutual inductance, use an oscilloscope to measure relevant physical quantities and explore the relationship between the mutual inductance and each variable. Electromagnetic resonance experimental method: Connect the transmitting coil to a signal generator and the receiving coil to an oscilloscope. Use the signal generator to sweep the frequency to find the resonant frequency of the LC circuit between the transmitting and receiving coils. In the resonant state, change at least one of the coils' relative angle, center position, coil spacing, load, and input voltage, measure the transmission efficiency, and study the impact of each variable on the transmission efficiency.

[0010] Preferably, the relevant structural parameters of the transmitting coil and the receiving coil include the radius and the number of turns of the coil.

[0011] The beneficial effects of the present invention are: strong intuitiveness: by changing the controllable factors in the experiment, it is possible to intuitively observe that the physical quantities being studied (such as mutual inductance, transmission efficiency, etc.) change with the changes in the changed parameters, which helps the experimenter to better understand the physical principles.

[0012] High flexibility: The distance and relative angle between the transmitting coil and the receiving coil, the angle between the transmitting coil and the receiving coil, the input voltage and the relevant structural parameters of the coil can be flexibly adjusted to meet diverse experimental needs.

[0013] Outstanding contrast: Through experiments, students can intuitively feel the difference between electromagnetic induction and electromagnetic resonance, deepen their knowledge and understanding of these two wireless power transmission methods, and improve the effectiveness of experimental teaching and physics popularization.

[0014] Good economic efficiency: the required equipment and materials are simple and low-cost, making it suitable for promotion and use in various teaching and research scenarios.

[0015] Rich experimental diversity: Based on this device, a total of 14 experiments can be carried out (among which, based on electromagnetic induction research: (1) explore the relationship between mutual inductance and excitation voltage; (2) explore the effect of coil spacing on mutual inductance; (3) explore the effect of coil radius on mutual inductance; (4) explore the effect of the number of turns of the receiving coil on transmission efficiency; (5) explore the relationship between mutual inductance and coil angle; (6) explore the effect of the center position of the receiving and transmitting coils on the mutual inductance; (7) expansion experiment: find the maximum receiving voltage and map the magnetic flux lines.

[0016] Research based on electromagnetic resonance: (1) Find the resonance point by changing the frequency; (2) Explore the effect of the resonance frequency on the transmission efficiency; (3) Explore the effect of the load on the transmission efficiency; (4) Explore the effect of the input voltage on the transmission efficiency; (5) Explore the effect of the coil spacing on the transmission efficiency; (6) Explore the effect of the receiving coil deflection angle on the transmission efficiency; (7) Explore the effect of the center point offset on the transmission efficiency. ) Covering the research of multiple aspects of electromagnetic induction and electromagnetic resonance, it greatly expanded the breadth and depth of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the present invention; Figure 2 A perspective view of the present invention with the transmitter coil and the receiver coil removed; Figure 3 A three-dimensional diagram of a transmitting coil or a receiving coil in the present invention; Figure 4 It is a cross-sectional view of the transmitting coil or the receiving coil in the present invention. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixedly connected," and "fixed connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0022] like Figure 1 and Figure 2 As shown, a wireless energy transmission comprehensive experimental device is mainly composed of a base plate 1, a large turntable with a scale 2, a lead screw 3, a first base column 4, a second base column 5, a small scale plate 6, a transmitting coil group 7, and a receiving coil group 8. These components are combined together through specific connection methods to achieve the various functions required for the experiment.

[0023] Installation and connection of components Baseplate and Large Turntable with Scale: The large turntable with scale is rotatably mounted on the baseplate, allowing it to rotate 360° around the baseplate. The first base post passes through the center hole of the large turntable with scale and is then fixedly connected to the baseplate. This ensures that the first base post remains fixed as the turntable rotates.

[0024] Screw and Large Rotary Disc with Scale: The screw is mounted on the large rotary disc with scale. The slider on the screw is connected to the second base column. Operating the screw drives the second base column within a 50cm range along the screw axis. The distance scale on the screw accurately indicates the linear distance the receiving coil assembly has moved relative to the transmitting coil assembly.

[0025] Small dials and base columns: Use glue to fix the two small dials to the top of the first base column and the second base column respectively. At the same time, make sure that the centers of the small dials and the base columns are aligned to ensure coaxial rotation.

[0026] Coil Assembly and Base Column: The transmitting coil assembly is pluggable and installed in the center hole at the top of the first base column, while the receiving coil assembly is pluggable and installed in the center hole at the top of the second base column. This pluggable installation method facilitates the replacement of coil assemblies of different specifications to meet the needs of different experiments. Except for the glued and plug-in connections, all other components are fixed with screws to ensure the stability of the device structure.

[0027] Transmitting coil group and receiving coil group structure like Figure 3 and Figure 4 As shown, both the transmitting coil assembly and the receiving coil assembly include a central circular plate 9, a base 10 for securing the central circular plate, and opposing first and second side plates 11 and 12. The central circular plate secures the shape of the coil 13, which is sandwiched between the first and second side plates, with the center of the coil coinciding with the center of the central circular plate. The base has a connector 14 at the bottom that mates with the center hole at the top of the first or second base column. This connector allows for plug-in installation of the transmitting coil assembly and the receiving coil assembly, while allowing the base to rotate freely about its central axis. The coils have two leads, each with corresponding lead holes on the first and second side plates. The leads are routed through the holes between the first and second side plates for connection to an external signal generator, oscilloscope, or load test equipment.

[0028] Experimental method implementation process (1) Electromagnetic induction experimental method Experimental Preparation First, connect the two pins of the transmitting coil to an AC power source with a fixed frequency to provide an alternating current to the transmitting coil, causing it to generate an alternating magnetic field.

[0029] Next, connect the two pins of the receiving coil to the oscilloscope to measure the induced electromotive force and other related physical quantities generated in the receiving coil.

[0030] Variable control and measurement Change the relevant structural parameters of the coil: replace the transmitting coil and receiving coil with different radii, numbers of turns, and lengths. Each time the coil is changed, use an oscilloscope to measure the induced electromotive force and other related physical quantities in the receiving coil. According to the definition of mutual inductance:

[0031] , where Φ is the total magnetic flux through the second coil and I is the current in the first coil, where is the vacuum magnetic permeability (constant), N1 and N2 are the number of turns of the two coils respectively, A is the area of ​​the second coil, d is the distance between the two coils, and M is also related to the shape, size, number of turns, relative position of the two coils and the surrounding magnetic medium. Analyze the relationship between the mutual inductance coefficient and the relevant structural parameters of the coils.

[0032] Changing the relative angle: By rotating the transmitting coil group and the receiving coil group, the relative angle between them is changed. Each time the angle is adjusted, the measurement data displayed on the oscilloscope is recorded to study the effect of the relative angle on the mutual inductance coefficient.

[0033] Change the center position: Move the receiving coil group so that its center position changes relative to the transmitting coil group. Observe the changes in the oscilloscope data and explore the relationship between the center position change and the mutual inductance coefficient.

[0034] Changing the coil spacing: Operate the leadscrew to change the spacing between the transmitting coil group and the receiving coil group, measure relevant physical quantities at different spacings, and analyze the effect of the coil spacing on the mutual inductance coefficient.

[0035] (2) Electromagnetic resonance experimental method Experimental Preparation The transmitting coil is connected to a signal generator, and alternating signals of different frequencies are generated by the signal generator.

[0036] Connect the receiving coil to an oscilloscope to monitor the working condition of the receiving coil.

[0037] Finding the resonant frequency Use a signal generator to perform a frequency sweep, gradually changing the frequency of the input signal. Observe the signal changes on the oscilloscope during the sweep. When the LC circuit between the transmitter and receiver coils reaches resonance, the signal displayed on the oscilloscope will show a noticeable change (such as a maximum voltage amplitude). The corresponding frequency at this point is the resonant frequency.

[0038] Variable control and measurement of transmission efficiency Changing the relative angle: Adjust the relative angle between the transmitting coil group and the receiving coil group, measure the transmission efficiency at each angle, and analyze the relationship between the relative angle and the transmission efficiency.

[0039] Changing the center position: Move the center position of the receiving coil group and record the transmission efficiency data at different center positions to explore the impact of the center position on transmission efficiency.

[0040] Changing the coil spacing: Use a leadscrew to change the spacing between the transmitting coil group and the receiving coil group, measure the transmission efficiency at different spacings, and study the effect of coil spacing on transmission efficiency.

[0041] Change the load: Connect loads of different resistance values, observe the changes in transmission efficiency, and analyze the impact of the load on transmission efficiency.

[0042] Changing the input voltage: By adjusting the output current of the signal generator, changing the current input to the transmitting coil, measuring the transmission efficiency under different input voltages, and studying the relationship between input voltage and transmission efficiency.

[0043] 3. Experimental Data Recording and Analysis During electromagnetic induction and resonance experiments, it's crucial to promptly and accurately record the relevant physical quantities and transmission efficiency data obtained after each variable change. This can be done in a table format, containing information such as variable names, variable values, measured physical quantity values, and calculated transmission efficiency. After the experiment, organize and analyze the recorded data, creating charts (such as line graphs and bar charts) to visually display the relationships between each variable, mutual inductance, and transmission efficiency. This will help you draw conclusions and deepen your understanding of the principles of wireless energy transmission and related physics.

[0044] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A wireless energy transmission comprehensive experimental device, characterized in that: The invention comprises a base plate, a large turntable with a scale, a lead screw, a first base column, a second base column, a small dial, a transmitting coil group and a receiving coil group; the large turntable with a scale is mounted on the base plate and can rotate 360° around the base plate, the first base column passes through the central through hole of the large turntable with a scale and is fixedly connected to the base plate; the lead screw is arranged on the large turntable with a scale, the second base column is connected to the slider of the lead screw, and the lead screw can drive the second base column to move within a range of 50 cm; the two small dials are fixed to the top of the first base column and the second base column by glue respectively and the centers are aligned; the transmitting coil group is pluggable and mounted in the central hole at the top of the first base column, and the receiving coil group is pluggable and mounted in the central hole at the top of the second base column; except for the glue bonding and plug-in connection parts, the other parts are fixedly connected by screws; the transmitting coil group and the receiving coil group can both rotate 360° around their own axes The large dial with scale can rotate freely, and when the large dial with scale rotates, it can drive the lead screw, the second base column, the small dial and the receiving coil group to rotate 360 ​​degrees around the transmitting coil group.

2. The wireless energy transmission comprehensive experimental device according to claim 1 is characterized in that: Each of the transmitting coil assembly and the receiving coil assembly includes a central circular plate, a base for fixing the central circular plate, and first and second side plates arranged opposite each other. The central circular plate is used to fix the shape of the coil, and the coil is sandwiched between the first and second side plates, with the center of the coil coinciding with the center of the central circular plate. The bottom of the base is provided with a connecting portion adapted to the center hole at the top of the first base column or the center hole at the top of the second base column to enable plug-in installation of the transmitting coil assembly and the receiving coil assembly, and the base can rotate freely around its central axis.

3. The wireless energy transmission comprehensive experimental device according to claim 1 is characterized in that: The coil is led out with two leads, and lead holes for the lead wires to pass through are correspondingly provided on the first side plate and the second side plate. The lead wires are led out from between the first side plate and the second side plate through the lead holes and are used to connect to an external signal generator, oscilloscope or load test equipment.

4. The wireless energy transmission comprehensive experimental device according to claim 1 is characterized in that: The lead screw is provided with a distance scale for accurately indicating the linear movement distance of the receiving coil assembly relative to the transmitting coil assembly.

5. An experimental method based on the wireless energy transmission comprehensive experimental device according to any one of claims 1 to 4, characterized in that: Including electromagnetic induction experimental method and electromagnetic resonance experimental method: Electromagnetic induction experiment method: Connect the two pins of the transmitting coil to a fixed-frequency AC power source, and the two pins of the receiving coil to an oscilloscope. Change at least one of the structural parameters, relative angle, center position, and coil spacing of the transmitting and receiving coils. Based on the definition of mutual inductance, use an oscilloscope to measure relevant physical quantities and explore the relationship between the mutual inductance and each variable. Electromagnetic resonance experiment method: Connect the transmitting coil to a signal generator and the receiving coil to an oscilloscope. Use the signal generator to sweep the frequency to find the resonant frequency of the LC circuit of the transmitting and receiving coils. In the resonant state, at least one of the coil's related structural parameters, relative angle, center position, coil spacing, load, and input voltage is changed, the transmission efficiency is measured, and the influence of each variable on the transmission efficiency is studied.

6. The experimental method according to claim 5, characterized in that The relevant structural parameters of the transmitting coil and the receiving coil include the radius and the number of turns of the coil.

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