CN203351097U - Faraday electromagnetic induction law exploration instrument - Google Patents
Faraday electromagnetic induction law exploration instrument Download PDFInfo
- Publication number
- CN203351097U CN203351097U CN 201320412483 CN201320412483U CN203351097U CN 203351097 U CN203351097 U CN 203351097U CN 201320412483 CN201320412483 CN 201320412483 CN 201320412483 U CN201320412483 U CN 201320412483U CN 203351097 U CN203351097 U CN 203351097U
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- guide rail
- coil
- electromagnetic induction
- induction law
- bar
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Abstract
The utility model discloses a Faraday electromagnetic induction law exploration instrument capable of assisting in perceiving the Faraday electromagnetic induction law. The exploration instrument is low in cost. The Faraday electromagnetic induction law exploration instrument disclosed in the utility model comprises a wire coil, a guide rail and a magnet body, wherein the guide rail is fixedly mounted on an installation platform, the guide rail is in a vertical state, the guide rail is formed by a transparent plastic tube or a glass tube, the wire coil is sleeved on the guide rail and can be fixed on different places of the guide rail, a bar-shaped magnet is mounted on the guide rail, the bar-shaped magnet can smoothly and completely pass through the wire coil, graduations are made on the guide rail and therefore the distance between the bar-shaped magnet and the wire coil can be measured conveniently, a sponge cushion and an opening are arranged below the guide rail and therefore the bar-shaped magnet can be taken out conveniently, and the sponge cushion can exert buffering effects. Furthermore, an induced-current generated by the wire coil is connected to an MICIN interface of a sound card through a conducting wire, and the sound card can be used for reading signals.
Description
Technical field
The utility model relates to the teaching aid field, specifically is applied to assisted learning and cognitive Faraday's electromagnetic induction law.
Background technology
Faraday's electromagnetic induction law is an important content of high school physics, is also a teaching difficulty simultaneously, and its content is: the size of induction electromotive force is directly proportional with the rate of change of magnetic flux.This law is not easy to do quantitative experiment with the conventional instrument be equipped with in laboratory, main problem is the bad direct measurement of magnetic flux, and to allow the magnetic flux even variation, and keep a period of time, this point is difficult to accomplish, if electric current is not steady current, with reometer, measures and just can not accurately read reading.The school had now can well complete this quantitative experiment by the DIS sensor.But because the DIS sensor is mostly expensive, not general school can be equipped with, and the more impossible student of allowing does grouping experiment.
What consider the utilization of moving-coil microphone is exactly the Faradic electricity magnetic induction principle, and the sound card that all computers all are equipped with is exactly, a good signal amplifies, processor, if can utilize it to replace reometer, just can measure easily the weak current caused by small-sized magnet.
LabVIEW is powerful and instrument and analysis software application development platform flexibly of of being released by American National instrument company (NI).The LabVIEW program is called virtual instrument, referred to as VI, the G language that LabVIEW is used is the most wieldy graphics data style of stream programming language, is specially adapted to the exploitation of the engineering application software of the aspects such as test, measurement, instrument control, process monitoring and industrial automation.It has simplified the exploitation of science calculating, process monitoring and controlling, test and process of measurement, has shortened the construction cycle greatly.
Summary of the invention
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, and a kind of Faraday's electromagnetic induction law exploring instrument that can assist cognitive Faraday's electromagnetic induction law is provided, this exploring instrument realize that cost is lower.
The utility model solves the technical scheme that its technical matters adopts: the Faraday's electromagnetic induction law exploring instrument, comprise coil, guide rail, magnet, and guide rail is fixedly mounted on mounting platform, and guide rail is in vertical state; Guide rail consists of lucite pipe or glass tube, and coil is enclosed within the outside of guide rail, can be fixed on the diverse location on guide rail; Bar magnet is installed on guide rail, and bar magnet can be smooth, complete passes through coil; Be manufactured with scale on guide rail, be convenient for measuring the distance of bar magnet to coil; The below of guide rail is provided with foam-rubber cushion and also is provided with opening simultaneously, the convenient bar magnet that takes out; Sponge paves buffer action.
Further, the induction current that above-mentioned coil produces is connected to the MIC IN interface of sound card by wire, utilize sound card to carry out read signal.
The utility model compared with prior art has the following advantages:
The utility model Faraday's electromagnetic induction law exploring instrument, realized by simple structure the measurement structure through coil that magnet strip is complete, after practice this instrument of proof have cheap, operation is simple and reliable, reading accuracy is than advantages of higher, and the teaching of Faraday's electromagnetic induction law is had to certain Practical significance.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is system controlling party block diagram of the present utility model.
Description of reference numerals:
The 1-bar magnet, 2-guide rail, 3-coil, 4-foam-rubber cushion, 5-mounting platform.
Embodiment
Below in conjunction with drawings and Examples, the utility model embodiment is described:
Fig. 1 shows a kind of concrete structure of the present utility model, as shown in the figure, the Faraday's electromagnetic induction law exploring instrument of our development, hardware components is comprised of coil 3, guide rail 2, magnet three parts, and instrument is assembled as shown in Figure 1; Guide rail 2 consists of lucite pipe or glass tube, and its effect is to allow the coil that passes through that bar magnet 1 can be smooth, complete; On guide rail 2, scale is arranged, be convenient for measuring the distance of bar magnet 1 to coil 3; There is foam-rubber cushion 4 guide rail 2 belows is provided with opening, the convenient bar magnet 1 that takes out; 4 buffer actions of foam-rubber cushion, the bar magnet 1 that protection is fallen can not damage; Coil 3 is enclosed within the guide rail outside, can be fixed on easily the diverse location of guide rail 2; Whole device is fixed on mounting platform 5, guarantees that guide rail 2 is in vertical state.
In the utility model, bar-shaped magnet 1 is always from static whereabouts, fixed position, guide rail top, and on the foam-rubber cushion 4 that drops on the guide rail below after coil, the distance of setting drop point and coil 3 is H, when magnet passes through coil, and the speed of magnet
.It is research process (this process can be seen and move with uniform velocity) that magnet is got minimum one section △ h during by coil,
, can release thus
, magnet is through the time of coil and the height of its each whereabouts
be directly proportional.Due to magnet, in dropping process, can make the magnetic flux of lower planar coil constantly change, form a series of pulse signals, the maximal value of the induction electromotive force produced when peak value wherein is exactly magnet through coil.So we can adopt control variate method to be probed into.The difficult point here is exactly how to measure this of short duration pulse signal.
The measurement of the utility model pulse signal:
The induction current that we produce coil is received the MIC IN interface of sound card, utilizes sound card to carry out read signal.And adopt LabVIEW11.0 to develop to the process software of signal.Software mainly comprises that on function signal acquisition module, signal analyse block and data processing module three parts form.System block diagram as shown in Figure 2.
The course of work of system is:
The weak current produced by coil by the application program collection, utilize sound card to convert digital signal to, sends into calculator memory, and draw out waveform on graphoscope; Simultaneity factor is carried out pre-service, analysis to waveform, automatically identifies maximal value, and result is shown to deposit, and data processing module can show with the form of form and chart induction current and height H, the relation of coil turn n.
The above is explained in detail the utility model preferred implementation by reference to the accompanying drawings, but the utility model is not limited to above-mentioned embodiment, in the ken possessed those of ordinary skills, can also under the prerequisite that does not break away from the utility model aim, make a variety of changes.
Do not break away from design of the present utility model and scope and can make many other changes and remodeling.Should be appreciated that the utility model is not limited to specific embodiment, scope of the present utility model is defined by the following claims.
Claims (2)
1. Faraday's electromagnetic induction law exploring instrument is characterized in that: comprise coil (3), guide rail (2), magnet, it is upper that guide rail (2) is fixedly mounted on mounting platform (5), and guide rail (2) is in vertical state; Guide rail (2) consists of lucite pipe or glass tube, and coil (3) is enclosed within the outside of guide rail (2), can be fixed on the diverse location on guide rail (2); Bar magnet (1) is installed on guide rail (2), and bar magnet (1) can be smooth, complete passes through coil (3); Guide rail is manufactured with scale on (2), is convenient for measuring the distance of bar magnet (1) to coil (3); The below of guide rail (2) is provided with foam-rubber cushion (4) and also is provided with opening simultaneously, the convenient bar magnet (1) that takes out; Foam-rubber cushion (4) plays buffer action.
2. Faraday's electromagnetic induction law exploring instrument as claimed in claim 1 is characterized in that: the induction current that above-mentioned coil (3) produces is connected to the MIC IN interface of sound card by wire, utilize sound card to carry out read signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320412483 CN203351097U (en) | 2013-07-11 | 2013-07-11 | Faraday electromagnetic induction law exploration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320412483 CN203351097U (en) | 2013-07-11 | 2013-07-11 | Faraday electromagnetic induction law exploration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203351097U true CN203351097U (en) | 2013-12-18 |
Family
ID=49750967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320412483 Expired - Fee Related CN203351097U (en) | 2013-07-11 | 2013-07-11 | Faraday electromagnetic induction law exploration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203351097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652692A (en) * | 2016-12-30 | 2017-05-10 | 罗春春 | Faraday's electromagnetic induction law quantitative experimental exploration instrument |
-
2013
- 2013-07-11 CN CN 201320412483 patent/CN203351097U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652692A (en) * | 2016-12-30 | 2017-05-10 | 罗春春 | Faraday's electromagnetic induction law quantitative experimental exploration instrument |
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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: 20131218 Termination date: 20140711 |
|
| EXPY | Termination of patent right or utility model |