CN203910128U - Lenz's law demonstrator - Google Patents
Lenz's law demonstrator Download PDFInfo
- Publication number
- CN203910128U CN203910128U CN201420348214.3U CN201420348214U CN203910128U CN 203910128 U CN203910128 U CN 203910128U CN 201420348214 U CN201420348214 U CN 201420348214U CN 203910128 U CN203910128 U CN 203910128U
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- light
- coil
- lamp band
- light emitting
- operated switch
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Abstract
The utility model relates to a Lenz's law demonstrator, comprising a first hollow cylinder, a coil and a bar-shaped magnet. Two light emitting diodes are connected in parallel and then connected in series with the coil to form a closed loop (1). A lamp strip driving and controlling circuit is connected with an LED lamp strip, and a closed loop (2) is formed through being arranged with an independent stabilized voltage supply in addition. A first light-operated switch and a second light-operated switch are electrically connected with the lamp strip driving and controlling circuit. The coil and the LED lamp strip are wound on the cylinder. The first light-operated switch and one light emitting diode are arranged in parallel. The second light-operated switch and the other light emitting diode are arranged in parallel. According to the Lenz's law demonstrator provided by the utility model, teaching of the Lenz's law is easy and visual.
Description
Technical field
The utility model relates to a kind of physical electromagnetic teaching demonstration equipment, specifically a kind of apparatus for demonstrating of Lenz law teaching use.
Background technology
In Middle School Physics, there is the teaching of a joint content of Lenz law.Mainly how the student of church understands Lenz law (how judging faradic direction).And association is used.In the past, the method that teacher adopts in teaching is with a reometer, when using bar magnet, when inserting or extracting coil, judge the direction of induction current table from the yawing moment of ammeter pointer, this method is very practical, but is saying time service, the relation between the direction of current in swaying direction and the solenoid of the pointer that need get across and solenoidal direction of winding three, this point, say time service teacher, often need to spend a large amount of time to guide, student could understand.
Why occur above problem, main cause is just, electric current is invisible, needs teacher to describe with language, and the power of expression and student's the understandability that are subject to teacher are limit, thereby grasp that can not be very fast to Lenz law.And in current trend in reometer and helical, the trend of electric current has very large difference.
Therefore be necessary to design a kind of new demonstrator for Lenz law, to improve above-mentioned defect.
Utility model content
The problems referred to above that exist in order to solve prior art, the utility model provide a kind of length adjustable, save timber, Simple steel keel that anti-twist property is strong.For achieving the above object, the technical solution adopted in the utility model is:
A kind of Lenz law demonstrator, comprise: the first hollow cylinder, coil and bar magnet, after two light emitting diode parallel connections and coil tandem formation closed-loop path (), the driving of lamp band and control circuit are connected in series with LED lamp band, additional one independently stabilized voltage supply form closed-loop path (two), the first light-operated switch, the second light-operated switch and the 3rd light-operated switch drive with lamp band respectively and control circuit is electrically connected, its coil and LED lamp band are wrapped on cylinder, the first light-operated switch and the first light emitting diode are laid in the unglazed casing of sealing side by side, the second light-operated switch and the second light emitting diode are laid in the unglazed casing of sealing side by side.
Preferably, LED lamp band is wrapped on the first hollow cylinder, and coil winding is being compared on the second hollow cylinder that the first hollow cylinder diameter is less.
Preferably, in sensitive reometer serial connection closed-loop path ().
Preferably, LED lamp band is composed in series by a string high-brightness light emitting diode.
Preferably, LED lamp band is respectively by the diode of a string highlighted glow diode and a string highlighted green light and connect and form.
Preferably, LED lamp band around to the wire of coil around to consistent, and exit is also arranged in together side by side.
Preferably, closed-loop path (one) also comprises current amplifier, after this current amplifier and two light emitting diode series connection in parallel, connects with coil again.
Adopt Lenz law demonstrator of the present utility model, will make the teaching of Lenz law become very light and directly perceived.
Brief description of the drawings:
Fig. 1 is the utility model structural principle schematic diagram.
Fig. 2 is another example structure schematic diagram of the utility model.
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, this
The schematic description and description of utility model is used for explaining the utility model, does not form this reality
With novel improper restriction.
Description of reference numerals: 1, the first hollow cylinder, 2, LED lamp band, 3, the second hollow cylinder, 4, coil, 5, magnet, 6, sensitive reometer, 7, the first light-operated switch, 8, the second light-operated switch, 9, lamp band drives and control circuit, and 10, the first light emitting diode, 11, the second light emitting diode, 12, current amplifier, 13, the 3rd light-operated switch.
Embodiment:
The utility model demonstrator for Lenz law, can be intuitively, demonstrating electromagnetic induction direction of current and Lenz law phenomenon enjoyably.
The utility model Lenz law demonstrator, comprising: the first hollow cylinder 1, coil 4 and bar magnet 5, light emitting diode I with after light emitting diode II parallel connection and coil 4 be connected in series formation closed-loop path (one); Light-operated switch I with after light-operated switch II parallel connection, be connected in series with LED lamp band 2, additional one independently stabilized voltage supply form closed-loop path (two), its coil 4 and LED lamp band 2 are wrapped on cylinder 1, and LED lamp band 2 is laid side by side with the wire in loop ().
In the time that magnet 5 shifts near or inserts coil, increase through the magnetic flux of coil, at this moment faradic magnetic direction is contrary with the magnetic direction of magnet, hinders the increase of magnetic flux; In the time that magnet 5 leaves coil or therefrom extracts, reduce through the magnetic flux of coil, at this moment faradic magnetic direction is identical with the magnetic direction of magnet, hinders the minimizing of magnetic flux, this reflection be exactly Lenz law.That is to say, every induction current being caused by the increase of magnetic flux, the magnetic field that induction current excites just hinders the increase of original magnetic flux; Every induction current being caused by the minimizing of magnetic flux, the magnetic field that induction current excites just hinders the minimizing of original magnetic flux.Therefore the faradic direction in both of these case lower coil is contrary, is reflected on the utility model device, is exactly that two light emitting diodes are alternately luminous.Thereby two groups of light-operated switches are alternately connected, the light in lamp band can be flowed along two kinds of differences and direction.In addition in the time that magnet stop is motionless in coil, two light emitting diodes all do not work, unglazed in the situation that, export a signal to the 3rd light-operated switch, in figure 13 (can utilize electromagnetic relay often open or the difference of the connecting line of normally closed terminal realizes), making it control lamp band circuit is cut off, thereby make light not only not mobile but also thoroughly just unglazed, show in the time that magnet inserts but is motionless with this, in coil, influence electricity miscarriage is raw.
Below in conjunction with accompanying drawing, the utility model is further described, as shown in Figure 1:
In Fig. 1, the first hollow cylinder 1 is a hollow cylinder that diameter is larger, diameter 10cm, such diameter can allow last row's student in classroom also can see, LED lamp band 2 is the lamp bands that are connected into by the light emitting diode of a string high brightness, in the time that closed-loop path (two) connect, diode can be luminous and luminous point can flow and form the effect of flowing water sample, its driving circuit 9 can adopt the drive circuit module of ornamental horse race lamp band on sale on market, the control of direction of current is controlled by the first light-operated switch 7 and the second light-operated switch 8, these two light-operated switches are in fact two photoswitchs, wherein the first light-operated switch 7 and light emitting diode 10 are laid side by side, the second light-operated switch 8 and light emitting diode 11 are laid side by side.
It is a cylinder that diameter is less that the second hollow cylinder 3 is compared the first hollow cylinder 1, and the coil 4 being made up of enameled wire is wrapped on the second hollow cylinder 3, after light emitting diode 10 and light emitting diode 11 parallel connections, is serially connected in solenoid circuit.In the time that inserting or extract, bar magnet 5 can in solenoid coil 4, produce clockwise or counterclockwise electric current.When induction current is along clockwise direction time, 10 is luminous, now illuminates the first light-operated switch 7 being in juxtaposition with it, makes 7 connections, and now the light in lamp band is along flowing clockwise.When induction current is in the counterclockwise direction time, light emitting diode 11 is luminous, has illuminated the second light-operated switch 8 being in juxtaposition with it, and now the light in lamp band flows in the counterclockwise direction.When do not have induction current produce time, light emitting diode 10 and 11 is not luminous, now, under dark state, control circuit can make the 3rd light-operated switch 13 conductings, now, in lamp band without light, also not mobile effect.
As a kind of design that improves of the present utility model, can use the LED lamp band of burn red to be connected in series with the first light-operated switch 7, use the LED lamp band of glow green to be connected in series with the second light-operated switch 8, like this, different current directions can use red green two kinds of color displays simultaneously.Can make like this demonstration more clear lively.
If when mounted, make LED lamp band around to consistent with the wire coiling by solenoid coil 4, and exit grandfather is arranged in together side by side, like this, just can make the flow direction in LED lamp band consistent with the direction of current in wire all the time, like this, just can be very vivid be presented in electromagnetic induction phenomenon, the direction in faradic direction and former magnetic field, solenoidal around to and the variation of magnetic flux between relation, utilize such device will make the teaching of Lenz law become very easily and directly perceived.
Fig. 2 is the utility model preferred embodiment structural representation, and closed-loop path (one) also comprises current amplifier 12, after this current amplifier 12 and two light emitting diode 10 series connection in parallel, connects with coil 4 again.Increasing the object of current amplifier 12 is: if run into induction current hour in the time of demonstration, current amplifier 12 can guarantee that light emitting diode 10 can be luminous, is convenient to carrying out smoothly of teaching.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a Lenz law demonstrator, comprise: the first hollow cylinder (1), coil (4) and bar magnet (5), it is characterized in that: after the first light emitting diode (10) and the second light emitting diode (11) are in parallel and coil (4) be connected in series formation closed-loop path (), lamp band drives and control circuit (9) is connected in series with LED lamp band (2), additional one independently stabilized voltage supply form closed-loop path (two), the first light-operated switch (7), the second light-operated switch (8) and the 3rd light-operated switch (13) drive with lamp band respectively and control circuit (9) is electrically connected, its coil (4) and LED lamp band (2) are wrapped on cylinder (1), the first light-operated switch (7) and the first light emitting diode (10) are laid in the unglazed casing of sealing side by side, the second light-operated switch (8) and the second light emitting diode (11) are laid in the unglazed casing of sealing side by side.
2. a kind of Lenz law demonstrator according to claim 1, it is characterized in that: it is upper that LED lamp band (2) is wrapped in the first hollow cylinder (1), and coil (4) is wrapped in to be compared on the second hollow cylinder (3) that the first hollow cylinder (1) diameter is less.
3. a kind of Lenz law demonstrator according to claim 1, is characterized in that: in sensitive reometer (6) serial connection closed-loop path ().
4. a kind of Lenz law demonstrator according to claim 1, is characterized in that: LED lamp band (2) is composed in series by a string high-brightness light emitting diode.
5. according to a kind of Lenz law demonstrator described in claim 1 or 4, it is characterized in that: LED lamp band (2) is respectively by the diode of a string highlighted glow diode and a string highlighted green light and connect and form.
6. a kind of Lenz law demonstrator according to claim 1, is characterized in that: LED lamp band (2) around to the wire of coil (4) around to consistent, and exit is also arranged in together side by side.
7. a kind of Lenz law demonstrator according to claim 1, it is characterized in that: closed-loop path (one) also comprises current amplifier (12), after this current amplifier (12) and two light emitting diodes in parallel (10) series connection, connect with coil (4) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348214.3U CN203910128U (en) | 2014-06-20 | 2014-06-20 | Lenz's law demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348214.3U CN203910128U (en) | 2014-06-20 | 2014-06-20 | Lenz's law demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910128U true CN203910128U (en) | 2014-10-29 |
Family
ID=51784385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420348214.3U Expired - Fee Related CN203910128U (en) | 2014-06-20 | 2014-06-20 | Lenz's law demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910128U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047053A (en) * | 2015-07-01 | 2015-11-11 | 上海市行知实验中学 | Lenz's law demonstration instrument |
| CN105608970A (en) * | 2016-03-15 | 2016-05-25 | 河南师范大学 | Multifunctional Lenz law demonstration apparatus |
| CN106023746A (en) * | 2015-10-02 | 2016-10-12 | 刘绍家 | Visual demonstration instrument for Lenz's law |
| CN106057043A (en) * | 2016-08-08 | 2016-10-26 | 郭金虎 | Energy distribution demonstrator of working state of motor |
| CN106097858A (en) * | 2016-08-08 | 2016-11-09 | 郭金虎 | Electric tank working state energy distribution apparatus for demonstrating |
| CN109873547A (en) * | 2019-01-21 | 2019-06-11 | 姜春艳 | A kind of power supply |
-
2014
- 2014-06-20 CN CN201420348214.3U patent/CN203910128U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047053A (en) * | 2015-07-01 | 2015-11-11 | 上海市行知实验中学 | Lenz's law demonstration instrument |
| CN105047053B (en) * | 2015-07-01 | 2024-02-23 | 上海市行知实验中学 | Lenz's law demonstrator |
| CN106023746A (en) * | 2015-10-02 | 2016-10-12 | 刘绍家 | Visual demonstration instrument for Lenz's law |
| CN105608970A (en) * | 2016-03-15 | 2016-05-25 | 河南师范大学 | Multifunctional Lenz law demonstration apparatus |
| CN105608970B (en) * | 2016-03-15 | 2023-04-25 | 河南师范大学 | Multifunctional Lenz law demonstration device |
| CN106057043A (en) * | 2016-08-08 | 2016-10-26 | 郭金虎 | Energy distribution demonstrator of working state of motor |
| CN106097858A (en) * | 2016-08-08 | 2016-11-09 | 郭金虎 | Electric tank working state energy distribution apparatus for demonstrating |
| CN109873547A (en) * | 2019-01-21 | 2019-06-11 | 姜春艳 | A kind of power supply |
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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: 20141029 Termination date: 20150620 |
|
| EXPY | Termination of patent right or utility model |