CN213123481U - Faraday electromagnetic induction demonstration instrument - Google Patents
Faraday electromagnetic induction demonstration instrument Download PDFInfo
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- CN213123481U CN213123481U CN202021833180.9U CN202021833180U CN213123481U CN 213123481 U CN213123481 U CN 213123481U CN 202021833180 U CN202021833180 U CN 202021833180U CN 213123481 U CN213123481 U CN 213123481U
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- electromagnetic induction
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Abstract
The utility model discloses a Faraday electromagnetic induction demonstration instrument, a magnet is fixed at the lower end of a swing rod by a connector, the upper end of the swing rod is rotatably connected with a beam on a bracket by a bearing, a coil is positioned under the swing rod, the coil, a first diode and a first indicator lamp are connected by a first lead to form a first closed loop, the coil, a second diode and a second indicator lamp are connected by a second lead to form a second closed loop, the conducting direction of the first diode is opposite to that of the second diode, the swing rod drives the magnet to pass through the upper part of the coil, the lead on the coil cuts a magnetic induction wire, the first indicator lamp in the first closed loop or the second indicator lamp in the second closed loop can be lighted, the induced current direction in the first closed loop or the second closed loop is determined according to the conducting direction of the first diode or the second diode, thereby realizing the intuitive experiment for indicating the electromagnetic induction phenomenon, the closed circuit induces the generation of current and the direction of the induced current.
Description
Technical Field
The utility model belongs to teaching demonstration instrument field especially relates to a Faraday electromagnetic induction demonstration instrument.
Background
The Electromagnetic induction (Electromagnetic induction) phenomenon refers to a conductor placed in a changing magnetic flux, and generates an electromotive force. This electromotive force is called induced electromotive force or induced electromotive force, and when this conductor is closed into a loop, the electromotive force drives electrons to flow, and the formation of induced current (induced current) michael · faraday is generally recognized as a person who discovered electromagnetic induction in 1831, although the work of francisco Zantedeschi1829 may foresee this.
The electromagnetic induction refers to a phenomenon in which an induced electromotive force is generated due to a change in magnetic flux. The discovery of the electromagnetic induction phenomenon is one of the greatest achievements in the field of electromagnetism. The method not only reveals the internal relation between electricity and magnetism, but also lays an experimental foundation for the mutual conversion between electricity and magnetism, opens up a road for human to obtain huge and cheap electric energy, and has great significance in practical use. The discovery of the phenomenon of electromagnetic induction has marked the arrival of a significant industrial and technical revolution. The fact proves that the wide application of electromagnetic induction in electricians, electronic technology, electrification and automation plays an important role in promoting the development of social productivity and scientific technology, and the generation conditions of the electromagnetic induction phenomenon have two points, namely 1, closing a circuit and 2, changing the magnetic flux passing through the closed circuit; there are two methods for changing the magnetic flux, one is to make the conductor in the closed circuit do the motion of cutting the magnetic induction line in the magnetic field; another approach is to move a magnetic field within the conductor.
The existing experimental demonstration instrument for the electromagnetic induction law adopts an ammeter to indicate whether current exists in a closed circuit or not, the phenomenon is not intuitive, and students are very labored when understanding the generation of induced current and the direction of the induced current.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the electromagnetic induction demonstration instrument can intuitively indicate the generation of the induced current of the closed circuit and the direction of the induced current in an experiment of an electromagnetic induction phenomenon.
The utility model adopts the technical scheme as follows:
a Faraday electromagnetic induction demonstration instrument is characterized in that: the LED lamp comprises a bracket, a swing rod, a magnet, a coil, a first diode, a second diode, a first indicator light and a second indicator light, wherein the bracket is provided with a beam, and the central axis of the beam is in the horizontal direction; the upper end of the swing rod is rotatably connected with the cross beam by a bearing, the magnet is fixed at the lower end of the swing rod by a connector, and a connecting line from the N pole to the S pole of the magnet is mutually vertical to the central axis of the cross beam; the coil is located under the swing rod, the coil, the first diode and the first indicator light are connected through a first lead to form a first closed loop, the coil, the second diode and the second indicator light are connected through a second lead to form a second closed loop, and the conducting direction of the first diode in the first closed loop is opposite to the conducting direction of the second diode in the second closed loop.
The further technical scheme is as follows: the connector includes slide bar, sliding sleeve, extension spring and bandage, the slide bar is fixed in the pendulum rod lower extreme, and the inside cavity of slide bar, the sliding sleeve cover is located on the slide bar and rather than sliding connection, the extension spring is located inside the slide bar, and extension spring one end is fixed with the slide bar inner wall, the extension spring other end is fixed with the sliding sleeve inner wall, the draw-in groove has been seted up to the pendulum rod lower extreme, the sliding sleeve has the fixture block towards the one end of pendulum rod, the fixture block is located inside the draw-in groove, the bandage is located the sliding sleeve, and the magnet is.
The further technical scheme is as follows: one end of the bandage is fixed with the sliding sleeve and the other end of the bandage is fixed with the sliding sleeve through the magic tape.
The further technical scheme is as follows: the first indicator light is an LED light.
The further technical scheme is as follows: the second indicating lamp is an LED lamp.
The further technical scheme is as follows: the magnet is a rectangular magnet.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
in the utility model, the magnet is fixed at the lower end of the swing rod by means of the connector, the upper end of the swing rod is rotatably connected with the cross beam on the bracket by means of a bearing, the coil is positioned under the swing rod, the coil, the first diode and the first indicator lamp are connected by means of a first wire to form a first closed loop, the coil, the second diode and the second indicator lamp are connected by means of a second wire to form a second closed loop, the conducting direction of the first diode in the first closed loop is opposite to the conducting direction of the second diode in the second closed loop, the magnet passes through the upper part of the coil when the swing rod swings, the wire on the coil cuts the magnetic induction line, the first indicator lamp in the first closed loop or the second indicator lamp in the second closed loop can be lighted, and the induced current direction in the first closed loop or the second closed loop can be determined according to the conducting direction of the first diode or the second diode, therefore, the generation of the induced current of the closed circuit and the direction of the induced current in the experiment of intuitively indicating the electromagnetic induction phenomenon are realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of the connector of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1 and 2, a faraday electromagnetic induction demonstration instrument comprises a bracket 1, a swing rod 2, a magnet 3, a coil 4, a first diode 5, a second diode 6, a first indicator light 7 and a second indicator light 8, wherein a beam 9 is arranged on the bracket 1, and the central axis of the beam 9 is in the horizontal direction; the upper end of the swing rod 2 is rotatably connected with the cross beam 9 by a bearing, the magnet 3 is fixed at the lower end of the swing rod 2 by a connector, and a connecting line from the N pole to the S pole of the magnet 3 is mutually vertical to the central axis of the cross beam 9; the coil 4 is located right below the swing rod 2, the coil 4, the first diode 5 and the first indicator light 7 are connected through a first lead to form a first closed loop, the coil 4, the second diode 6 and the second indicator light 8 are connected through a second lead to form a second closed loop, and the conducting direction of the first diode 5 in the first closed loop is opposite to the conducting direction of the second diode 6 in the second closed loop.
When the device is used, when the swing rod 2 swings to drive the magnet 3 to pass through the coil 4, if the first indicator light 7 in the first closed loop is lighted, induction current is generated in the first closed loop, the direction of the induction current in the first closed loop is consistent with the conduction direction of the first diode 5, and the device can be used for right-hand rule experiments, and no induction current exists in the second closed loop in the process;
if the second indicator light 8 in the second closed loop is turned on when the swing rod 2 drives the magnet 3 to pass through the coil 4, it is indicated that induced current is generated in the second closed loop, and the direction of the induced current in the second closed loop is consistent with the conducting direction of the second diode 6, and no induced current exists in the second closed loop in the process, and the magnet 3 should be a rectangular magnet 3.
In the utility model, the magnet 3 is fixed at the lower end of the swing rod 2 by means of the connector, the upper end of the swing rod 2 is rotatably connected with the beam 9 on the bracket 1 by means of a bearing, the coil 4 is positioned under the swing rod 2, the coil 4, the first diode 5 and the first indicator light 7 are connected by means of a first wire to form a first closed loop, the coil 4, the second diode 6 and the second indicator light 8 are connected by means of a second wire to form a second closed loop, the conducting direction of the first diode 5 in the first closed loop is opposite to that of the second diode 6 in the second closed loop, the magnet 3 passes through the upper part of the coil 4 when the swing rod 2 swings, the wire on the coil 4 cuts the magnetic induction wire, the first indicator light 7 in the first closed loop or the second indicator light 8 in the second closed loop can be lighted, and the direction in the first closed loop or the second closed loop can be determined according to the conducting direction of the first diode 5 or the second diode 6, therefore, the generation of the induced current of the closed circuit and the direction of the induced current in the experiment of intuitively indicating the electromagnetic induction phenomenon are realized.
The connector includes slide bar 10, sliding sleeve 11, extension spring 12 and bandage 13, slide bar 10 is fixed in 2 lower extremes of pendulum rod, and the inside cavity of slide bar 10, sliding sleeve 11 cover is located on slide bar 10 and rather than sliding connection, extension spring 12 is located inside slide bar 10, and 12 one end of extension spring and the fixed, 12 other ends of extension spring and the 11 inner wall of sliding sleeve of slide bar 10 are fixed, draw-in groove 14 has been seted up to 2 lower extremes of pendulum rod, sliding sleeve 11 has fixture block 15 towards the one end of pendulum rod 2, fixture block 15 is located inside draw-in groove 14, bandage 13 is located sliding sleeve 11, and magnet 3 is fixed in 11 lower extremes of sliding sleeve through bandage 13.
The sliding sleeve 11 can be slid to separate the clamping block 15 from the clamping groove 14, and the sliding sleeve 11180 degrees is rotated to adjust the magnetic pole of the magnet 3, so that the direction of the magnetic induction line is changed, and the magnetic induction line can be used for right-hand rule determination in experiments.
One end of the binding band 13 is fixed with the sliding sleeve 11 and the other end of the binding band 13 is fixed with the sliding sleeve 11 by the magic tape 16.
The first indicator light 7 is an LED light.
The second indicator light 8 is an LED light.
The magnet 3 is a rectangular magnet.
The above description is only the preferred embodiment of the present invention.
Claims (6)
1. A Faraday electromagnetic induction demonstration instrument is characterized in that: the LED lamp comprises a bracket (1), a swing rod (2), a magnet (3), a coil (4), a first diode (5), a second diode (6), a first indicator light (7) and a second indicator light (8), wherein a cross beam (9) is arranged on the bracket (1), and the central axis of the cross beam (9) is in the horizontal direction; the upper end of the swing rod (2) is rotatably connected with the cross beam (9) by a bearing, the magnet (3) is fixed at the lower end of the swing rod (2) by a connector, and a connecting line from the N pole to the S pole of the magnet (3) is mutually vertical to the central axis of the cross beam (9); the coil (4) is located right below the swing rod (2), the coil (4), the first diode (5) and the first indicator light (7) are connected through a first lead to form a first closed loop, the coil (4), the second diode (6) and the second indicator light (8) are connected through a second lead to form a second closed loop, and the conducting direction of the first diode (5) in the first closed loop is opposite to the conducting direction of the second diode (6) in the second closed loop.
2. A faraday electromagnetic induction demonstration apparatus according to claim 1, wherein: the connector includes slide bar (10), sliding sleeve (11), extension spring (12) and bandage (13), slide bar (10) are fixed in pendulum rod (2) lower extreme, and slide bar (10) inside cavity, sliding sleeve (11) cover is located on slide bar (10) and rather than sliding connection, extension spring (12) are located inside slide bar (10), and extension spring (12) one end and slide bar (10) inner wall are fixed, extension spring (12) other end and sliding sleeve (11) inner wall are fixed, draw-in groove (14) have been seted up to pendulum rod (2) lower extreme, sliding sleeve (11) have fixture block (15) towards the one end of pendulum rod (2), fixture block (15) are located inside draw-in groove (14), bandage (13) are located sliding sleeve (11), and magnet (3) are fixed in sliding sleeve (11) lower extreme through bandage (13).
3. A faraday electromagnetic induction demonstration apparatus according to claim 2, wherein: one end of the binding band (13) is fixed with the sliding sleeve (11) and the other end of the binding band (13) is fixed with the sliding sleeve (11) by means of a magic tape (16).
4. A faraday electromagnetic induction demonstration apparatus according to claim 1, wherein: the first indicator lamp (7) is an LED lamp.
5. A faraday electromagnetic induction demonstration apparatus according to claim 1, wherein: the second indicator light (8) is an LED light.
6. A faraday electromagnetic induction demonstration apparatus according to claim 1, wherein: the magnet (3) is a rectangular magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021833180.9U CN213123481U (en) | 2020-08-28 | 2020-08-28 | Faraday electromagnetic induction demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021833180.9U CN213123481U (en) | 2020-08-28 | 2020-08-28 | Faraday electromagnetic induction demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213123481U true CN213123481U (en) | 2021-05-04 |
Family
ID=75656822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021833180.9U Expired - Fee Related CN213123481U (en) | 2020-08-28 | 2020-08-28 | Faraday electromagnetic induction demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213123481U (en) |
-
2020
- 2020-08-28 CN CN202021833180.9U patent/CN213123481U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210504 Termination date: 20210828 |