CN203931286U - A kind of skin effect demonstration experimental provision - Google Patents
A kind of skin effect demonstration experimental provision Download PDFInfo
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- CN203931286U CN203931286U CN201420194581.2U CN201420194581U CN203931286U CN 203931286 U CN203931286 U CN 203931286U CN 201420194581 U CN201420194581 U CN 201420194581U CN 203931286 U CN203931286 U CN 203931286U
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- resistance
- skin effect
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- emitting diode
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Abstract
The utility model belongs to teaching and uses lecture experiment field, is specially a kind of experimental provision of demonstrating skin effect.It comprises: a bundle bundle conductor, an AC signal source, one group of resistance, a light emitting diode, an A.C. voltmeter and a high-frequency signal line interface etc.; Wherein, bundle conductor is tied up or is bonded by the diameter of a large amount of parallel connections, copper thin wire (or enameled wire) equal in length, is similar to one whole solid conductor, as measured object in macroscopic view; AC signal source provides the sinusoidal ac signal of adjustable frequency, for demonstrating the degree of strength of skin effect under different frequency; The difference of the Inside and Outside of Conductor layer electric current power that skin effect shows is converted into voltage signal via one group of identical resistance of resistance and samples, and represent by the brightness of light emitting diode or the registration of A.C. voltmeter, also or by high-frequency signal line interface, export the equipment such as oscillograph to and observe.
Description
Technical field
The utility model belongs to teaching and uses lecture experiment field, is specifically related to a kind of experimental provision of demonstrating skin effect, especially utilizes bundle conductor to substitute the method for solid conductor with the experimental provision of demonstration skin effect.
Background technology
When exchange current passes through conductor, because inductive action causes that on cross-sectional area of conductor, distribution of current is inhomogeneous, more approach conductive surface current density larger, this phenomenon claims " skin effect ".The conductor of round section of take is example, more near conductor center, is subject to the self-induction electromotive force that the outside magnetic line of force produces larger; More near surface, be not subject to the impact of its inner magnet line of force growth and decline, thereby self-induction electromotive force is less.At present generally for demonstrating the experimental provision of skin effect, be mostly hollow structure, utilize bulb or AC ammeter to demonstrate or measure conductor axis and outer wall size of current different in High-frequency and low-frequency situation.But circular solids wire conventional in this structure and reality greatly differs from each other, cannot be for expressing on solid conductor cross section current conditions everywhere.
Summary of the invention
It is a kind of for demonstrating the skin effect demonstration experimental provision of solid conductor cross section, current conditions under skin effect impact that the purpose of this utility model has been to provide, this device utilizes with the approximate solid conductor method of bundle conductor, can react qualitatively the skin effect in solid conductor.
Skin effect demonstration experimental provision provided by the utility model, it mainly comprises bundle conductor 1, AC signal source 2, several pistol sockets 4, several resistance 3, light emitting diode 5, A.C. voltmeter 6, high-frequency signal line interface 7 and rifle plug 8; Wherein,
Described bundle conductor 1 comprises the wire that several are in parallel, and the end of each root wire is connected with one end of a resistance 3 respectively; Described pistol socket 4 is arranged in each root wire of bundle conductor 1 and the junction of resistance 3, for deriving the voltage signal on each resistance 3; After the other end polymerization of described resistance 3, polymerization end is by an AC signal source 2, with the wire head end of bundle conductor 1, is together in series and forms one group of loop; The polymerization end of described resistance 3 is connected in parallel with one end of light emitting diode 5, A.C. voltmeter 6 and high-frequency signal line interface 7 respectively again; The other end of light emitting diode 5, A.C. voltmeter 6 and high-frequency signal line interface 7 is connected respectively a rifle plug 8.
During this use is novel, the sinusoidal ac signal that described AC signal source 2 is 0-3MHz.
During this use is novel, the internal resistance of described light emitting diode 5 is greater than the resistance of resistance 3.
In the utility model, the diameter of wire of described bundle conductor 1, equal in length, is copper thin wire or enameled wire.
In the utility model, the resistance of each resistance 3 is identical, and from resistance terminal sampled signal.
During this use is novel, light emitting diode is connected with each pistol socket 4 by pistol plug, make light emitting diode can be parallel to each resistance, the big or small positive correlation of voltage amplitude on the now brightness of light emitting diode and this resistance, thus can qualitative sign the strength of current of thin wire by this resistance.In like manner, when the pistol plug of A.C. voltmeter is connected with pistol socket, what A.C. voltmeter was indicated is the voltage swing on corresponding resistor; And when the pistol plug of high-frequency signal line interface is connected with pistol socket 4, can utilize high-frequency signal line that the AC signal waveform on corresponding resistor is transported on the equipment such as oscillograph to observe.
During this use is novel, bundle conductor 1 is tied up or is bonded by the diameter of a large amount of parallel connections, copper thin wire or enameled wire equal in length, is similar to one whole solid conductor, as measured object in macroscopic view; AC signal source provides the sinusoidal ac signal of adjustable frequency, for demonstrating the degree of strength of skin effect under different frequency; The difference of the Inside and Outside of Conductor layer electric current power that skin effect shows is converted into voltage signal via one group of identical resistance of resistance and samples, and represent by the brightness of light emitting diode or the registration of A.C. voltmeter, also or by high-frequency signal line interface, export the equipment such as oscillograph to and observe.
In the utility model, utilize the signal of light emitting diode and A.C. voltmeter observation sampling gained, and the signal of sampling gained can export by interface the external units such as oscillograph to.
In the utility model, AC signal source frequency is adjustable.
Ultimate principle of the present utility model is as follows:
Use for reference the finite element method in mathematics, a whole bundle wire is tied up or be bonded into the diameter of a large amount of parallel connections, copper thin wire (or enameled wire) equal in length, and in macroscopic view, seen as one whole solid conductor, wherein the end of each root thin wire all can be similar to a bit that regard as on solid conductor cross section.At each root thin wire (or enameled wire) end equal sampling resistor of a resistance of connecting, the voltage at sampling resistor two ends be proportional to by the electric current of thin wire (or enameled wire) so, that is certain any electric current on solid conductor cross section.If a light emitting diode in parallel at sampling resistor two ends, its brightness also can reflect by the strength of current of this root thin wire (or enameled wire), thereby for demonstration.
The beneficial effects of the utility model are, utilize this approximate method of bundle conductor to realize the lecture experiment of skin effect in solid conductor, simple in structure.
Accompanying drawing explanation
Fig. 1 is device of the present utility model and wiring diagram.
Fig. 2 is the sectional view of bundle conductor 1 in the utility model Fig. 1, represents the rule of each root wire mark numbering in bundle conductor in enlarged drawing.
Number in the figure: 1 is bundle conductor, 2 is AC signal source, and 3 is resistance, and 4 is pistol socket, and 5 is light emitting diode, and 6 is A.C. voltmeter, and 7 is high-frequency signal line interface, and 8 is pistol plug.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
In Fig. 1, bundle conductor 1 is tied up or bonding bunchy by some isometric isodiametric copper thin wires (or enameled wire), all wires are in parallel, the end of each root wire (or enameled wire) is all connected with the resistance 3 of a same resistance respectively, is then together in series and forms one group of loop with the AC signal source 2 that the sinusoidal ac signal of 0-3MHz can be provided.At each root wire (or enameled wire) of bundle conductor 1 and the junction of resistance 3, place a pistol socket 4 for deriving the voltage signal on each resistance 3.The internal resistance of light emitting diode 5 is much larger than the resistance of resistance 3, can be connected with each pistol socket 4 by pistol plug 8, make light emitting diode 5 can be parallel to each resistance 3, the big or small positive correlation of voltage amplitude on the now brightness of light emitting diode 5 and this resistance 3, thus can qualitative sign the strength of current of thin wire (or enameled wire) by this resistance 3.Similarly, when pistol plug 9 is connected with pistol socket 4, what A.C. voltmeter 6 was indicated is the voltage swing on corresponding resistor 3; And when pistol plug 10 is connected with pistol socket 4, can utilize high-frequency signal line that the AC signal waveform on corresponding resistor 3 is transported on the equipment such as oscillograph to observe.
In Fig. 2, chosen the parts of fine wire (or enameled wire) of bundle conductor 1 cross-section center so that its label mode to be described.The label of thin wire (or enameled wire) is from of bundle conductor 1 bosom, outwards increase progressively successively layer by layer, this label can be marked at resistance or the pistol socket side of connecting with each root respective wire in Fig. 1, to indicate the position of respective wire in bundle conductor 1.
Claims (5)
1. a skin effect demonstration experimental provision, is characterized in that mainly comprising bundle conductor (1), AC signal source (2), several pistol sockets (4), several resistance (3), light emitting diode (5), A.C. voltmeter (6), high-frequency signal line interface (7) and rifle plug (8); Wherein,
Described bundle conductor (1) comprises the wire that several are in parallel, and the end of each root wire is connected with one end of a resistance (3) respectively; Described pistol socket (4) is arranged in the junction of each root wire and the resistance (3) of bundle conductor (1), for deriving the voltage signal on each resistance (3); After the other end polymerization of described resistance (3), polymerization end is by an AC signal source (2), and the wire head end of same bundle conductor (1) is together in series and forms one group of loop; The polymerization end of described resistance (3) more respectively one end of same light emitting diode (5), A.C. voltmeter (6) and high-frequency signal line interface (7) be connected in parallel; The other end of light emitting diode (5), A.C. voltmeter (6) and high-frequency signal line interface (7) is connected respectively a rifle plug (8).
2. skin effect demonstration experimental provision according to claim 1, is characterized in that the sinusoidal ac signal that described AC signal source (2) is 0-3MHz.
3. skin effect demonstration experimental provision according to claim 1, is characterized in that the internal resistance of described light emitting diode (5) is greater than the resistance of resistance (3).
4. skin effect demonstration experimental provision according to claim 1, is characterized in that the diameter of wire, equal in length of described bundle conductor (1), is copper thin wire or enameled wire.
5. skin effect demonstration experimental provision according to claim 1, is characterized in that the resistance of each resistance (3) is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194581.2U CN203931286U (en) | 2014-04-22 | 2014-04-22 | A kind of skin effect demonstration experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194581.2U CN203931286U (en) | 2014-04-22 | 2014-04-22 | A kind of skin effect demonstration experimental provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203931286U true CN203931286U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420194581.2U Expired - Fee Related CN203931286U (en) | 2014-04-22 | 2014-04-22 | A kind of skin effect demonstration experimental provision |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741669A (en) * | 2019-02-28 | 2019-05-10 | 中国地质大学（武汉） | The demonstrator of method demonstration skin effect based on equivalent measuring resistance |
| CN110288889A (en) * | 2019-07-30 | 2019-09-27 | 新疆工程学院 | A kind of homogeneous half space plane electric fields distribution characteristics experimental provision and experimental method |
| CN112014626A (en) * | 2020-08-10 | 2020-12-01 | 南京信息工程大学 | Skin effect measuring device and method |
-
2014
- 2014-04-22 CN CN201420194581.2U patent/CN203931286U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741669A (en) * | 2019-02-28 | 2019-05-10 | 中国地质大学（武汉） | The demonstrator of method demonstration skin effect based on equivalent measuring resistance |
| CN110288889A (en) * | 2019-07-30 | 2019-09-27 | 新疆工程学院 | A kind of homogeneous half space plane electric fields distribution characteristics experimental provision and experimental method |
| CN110288889B (en) * | 2019-07-30 | 2024-06-04 | 新疆工程学院 | Experimental device and experimental method for uniform half-space plane electric field distribution characteristics |
| CN112014626A (en) * | 2020-08-10 | 2020-12-01 | 南京信息工程大学 | Skin effect measuring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150422 |
|
| EXPY | Termination of patent right or utility model |