CN208521509U - Faraday's electromagnetic induction law quantitative demonstrator - Google Patents
Faraday's electromagnetic induction law quantitative demonstrator Download PDFInfo
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- CN208521509U CN208521509U CN201820454212.0U CN201820454212U CN208521509U CN 208521509 U CN208521509 U CN 208521509U CN 201820454212 U CN201820454212 U CN 201820454212U CN 208521509 U CN208521509 U CN 208521509U
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- faraday
- electromagnetic induction
- insulated lift
- lift pipe
- induction law
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Abstract
The utility model discloses Faraday's electromagnetic induction law quantitative demonstrators, including insulated lift pipe, strong magnet, measuring coil and induced potential measurement plate, measuring coil is cased on the insulated lift pipe, measuring coil includes the coil being wound on insulation tube, the upper and lower ends setting installation disk of insulation tube, the center for installing disk are equipped with diameter through-hole identical with insulation bore；Rubber ring is equipped between insulation tube and insulated lift pipe；The side of installation disk is fixedly connected with induced potential measurement plate, and induced potential measurement plate includes plate body, and the plate body is equipped with digital voltmeter, power supply, diode, power switch, capacitor and capacitor reset switch；The inside of insulated lift pipe is equipped with strong magnet, and the top center of strong magnet is fixedly connected with drawstring；The Faraday's electromagnetic induction law quantitative demonstrator structure is simple, at low cost, does not need the cooperation of DIS system and computer, conducive to popularizing, is worth promoting.
Description
Technical field
The utility model relates to teaching and experiment equipment field, especially a kind of Faraday's electromagnetic induction law is quantitatively demonstrated
Device.
Background technique
The law of electromagnetic induction is also Faraday's electromagnetic induction law, and electromagnetic induction phenomenon refers to because magnetic flux change generates sense
The phenomenon that answering electromotive force, for example, when a part of conductor of closed circuit does the movement of cutting magnetic induction line in magnetic field, in conductor just
Electric current can be generated, the electric current of generation is known as induced current, and the electromotive force of generation is known as induced electromotive force.
It is by qualitative analysis electromagnetic induction that " Faraday's electromagnetic induction law " is taught in version teaching material as experimental laws people
Related experiment directly gives, and lacks quantitative experiment.With the development of education skill and the raising of teachers' innovation ability, very much
The experimental method that teacher's research practice is quantitatively probed into.But often experimental principle is complicated, and the acquisition and display of data rely on DIS system
System and computer, it is universal in the more backward area of economy that this is unfavorable for experimental method.
Utility model content
The utility model is intended to provide a kind of quantitative experiment that can conveniently carry out Faraday's electromagnetic induction law
Faraday's electromagnetic induction law quantitative demonstrator.
To achieve the above object, the utility model provides the following technical solutions: Faraday's electromagnetic induction law is quantitatively demonstrated
Device, including insulated lift pipe, strong magnet, measuring coil and induced potential measurement plate are cased with measurement line on the insulated lift pipe
Circle, measuring coil include the coil being wound on insulation tube, and the upper and lower ends setting installation disk of insulation tube is installed in disk
The heart is equipped with diameter through-hole identical with insulation bore；Rubber ring is equipped between insulation tube and insulated lift pipe；Disk is installed
Side is fixedly connected with induced potential measurement plate, and induced potential measurement plate includes plate body, the plate body be equipped with digital voltmeter,
Power supply, diode, power switch, capacitor and capacitor reset switch, coil, diode, capacitor are sequentially connected in series, electricity
Container, capacitor reset switch and digital voltmeter are parallel with one another, and voltmeter connects power supply by power switch；Insulated lift
The inside of pipe is equipped with strong magnet, and the top center of strong magnet is fixedly connected with drawstring.
Further scheme as the utility model: the insulated lift pipe is lucite tube.
Further scheme as the utility model: the surface of the insulated lift pipe is equipped with graduation mark.
Further scheme as the utility model: the measuring coil be equipped with one or two or it is multiple.
Further scheme as the utility model: the rubber ring is located on the bottom of insulation tube.
Further scheme as the utility model: the strong magnet be set to insulator seal tubulature in, insulator seal tubulature it is upper
Lower both ends are equipped with end cap, and the outer diameter of insulator seal tubulature and the internal diameter diameter of insulated lift pipe are identical.
Further scheme as the utility model: being equipped with several strong magnets in the insulated lift pipe, strong magnet and absolutely
Edge lifting pipe is fixedly connected, and gap is equipped between the insulation tube and insulated lift pipe of measuring coil, and the bottom of measuring coil is installed
On annular base, one end of annular base connects slide by connecting rod, and slide is mounted on upright slide rail by sliding block, and
Connect the feed screw nut of vertical screw pair, upright slide rail and vertical screw pair be it is vertical be mounted on column, vertical screw rod
The output shaft of the bottom end connection wire rod driving motor of secondary screw rod.
Further scheme as the utility model: detachable connection between the measuring coil and annular base.
Further scheme as the utility model: the annular base two sides connect a cunning by connecting rod respectively
Seat, slide are mounted on upright slide rail by sliding block, and one of slide connects the feed screw nut of vertical screw pair.
Compared with prior art, the utility model has the beneficial effects that the Faraday's electromagnetic induction law quantitative demonstrator
Structure is simple, at low cost, does not need the cooperation of DIS system and computer, conducive to popularizing, can utilize the movement of falling object
Principle realize that magnet passes through the speed of coil to probe into the factor for influencing induced electromotive force size, carry out quantitative demonstration with it is real
It tests, it is concise, it is worth promoting.
Detailed description of the invention
Fig. 1 is that the control magnetic flux quantitative change rate Δ φ/Δ t of the utility model in embodiment one is constant, probes into induction electric
The structural schematic diagram when relationship of gesture and turn number N；
Fig. 2 is that control the number of turns N of the utility model in embodiment one is constant, probes into induced electromotive force and variation rate of magnetic flux
Structural schematic diagram when Δ φ/Δ t relationship；
Fig. 3 is the measuring coil of the utility model and the structural schematic diagram of induced potential measurement plate in embodiment one；
Fig. 4 is the structural schematic diagram of the induced potential measurement plate of the utility model in embodiment one；
Fig. 5 is the circuit connection diagram of the utility model in embodiment one；
The relational graph of 42 the number of turns N of induced electromotive force and coil when Fig. 6 is variation rate of magnetic flux Δ φ/Δ t constant；
Induced electromotive force and variation rate of magnetic flux Δ φ/Δ t relational graph when Fig. 7 is the number of turns N constant；
Fig. 8 is the structural schematic diagram of the utility model in embodiment two；
Fig. 9 is the structural schematic diagram of the utility model in embodiment three.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
Please refer to Fig. 1-7, in the utility model embodiment, Faraday's electromagnetic induction law quantitative demonstrator, including insulation
Lifting pipe 1, strong magnet 2, measuring coil 4 and induced potential measurement plate 5 are cased with measuring coil 4 on the insulated lift pipe 1, survey
Amount coil 4 includes the coil 42 being wound on insulation tube 41, and the upper and lower ends setting installation disk 43 of insulation tube 41 installs disk
43 center is equipped with diameter through-hole identical with 41 internal diameter of insulation tube；Rubber ring is equipped between insulation tube 41 and insulated lift pipe 1；
The side of installation disk 43 is fixedly connected with induced potential measurement plate 5, and induced potential measurement plate 5 includes plate body 51, institute
Plate body 51 is stated equipped with digital voltmeter 52, power supply 53, diode 54, power switch 55, capacitor 56 and capacitor reset
Switch 57, coil 42, diode 54, capacitor 56 are sequentially connected in series, capacitor 56, capacitor reset switch 57 and digital
Voltmeter 52 is parallel with one another, and voltmeter connects power supply 53 by power switch 55；The inside of insulated lift pipe 1 is equipped with strong magnet 2,
The top center of strong magnet 2 is fixedly connected with drawstring 3.Strong magnet 2 is easily promoted using drawstring 3.
Further, insulated lift pipe 1 is lucite tube.
Further, the surface of insulated lift pipe 1 is equipped with graduation mark.Convenient for the reading of 2 height of strong magnet.
Further, measuring coil 4 be equipped with one or two or it is multiple.Mode and type selection according to specific experiments.
Further, rubber ring is located at the bottom of insulation tube 41.Rubber ring sleeve bears insulation tube 41 on insulated lift pipe 1
And 5 bring gravity of coil 42 and induced potential measurement plate, it is propped up using the frictional force of rubber ring and insulated lift pipe 1
Support.
Further, the internal diameter of insulation tube 41 is greater than or equal to the outer diameter of insulated lift pipe 1.
Further, digital voltmeter 52, power switch 55 and capacitor reset switch 57 are the electricity on plate body 51
Source 53, diode 54 and capacitor 56 are pasted on plate body 51.
Further, capacitor 56 be electrolytic capacitor 56 (50V, 11 μ F), 54 model IN4001 of diode, power supply 53 by
3 batteries of section 7, which are mounted in battery case, to be constituted (for digital voltmeter power supply), and power switch 55 is ship type switch, model
KCD1, (voltmeter power switch 55), capacitor reset switch 57 are self-resetting switch, model LA16-11M (capacitor 56
Electric discharge), digital voltmeter 52 be 0.56 cun of size three line 4-digit number voltmeters；Coil 42, diode 54, capacitor 56
It is followed in series to form behind circuit again capacitor 56, capacitor reset switch 57 and digital voltmeter 52 is parallel with one another, then leads to
It crosses power switch 55 and connect digital voltmeter 52 with power supply 53 and powered to digital voltmeter 52 by power supply 53.
Further, strong magnet 2 is set in insulator seal tubulature, and the upper and lower ends of insulator seal tubulature are equipped with end cap, insulation-encapsulated
The outer diameter of pipe is identical as the internal diameter diameter of insulated lift pipe 1.
Further, plate body 51 is connect by connecting plate with installation disk 43, and connecting plate and plate body 51 are glued, connecting plate and peace
It is bolted to connection between dress disk 43, opens up screw hole for fixing on connecting plate and installation disk 43.
The design feature and its working principle of the utility model: basic principle is: strong magnet 2 is done in insulated lift pipe 1
The movement of falling object, the magnetic flux across measuring coil 4 change, and generate induced electromotive force, and be connected with measuring coil 4
Induced electromotive force measurement plate in show.When generating induced electromotive force in coil 42, charge to capacitor 56, due to diode
54 unilateral conduction, capacitor 56 cannot be discharged by diode 54, and the four figures for being connected in parallel on 56 both ends of capacitor at this time is aobvious
Formula voltmeter can measure the maximum value of voltage, i.e. the maximum value of induced electromotive force, circuit connection is as shown in Figure 5.
The teaching demonstration example of the utility model:
One, control magnetic flux quantitative change rate Δ φ/Δ t is constant, probes into the relationship of 42 the number of turns N of induced electromotive force and coil
When magnet is fallen from sustained height, the magnetic flux change across same widths coil 42 is identical, and the time is identical, Δ
φ/Δ t is maintained for constant, and the coil 42 for changing different the number of turns probes into the relationship of induced electromotive force and the number of turns N.
Experimentation and data: the line of 3 measuring coils, 4,3 measuring coils 4 is arranged in replacement respectively on insulated lift pipe 1
The number of turns of circle 42 is respectively 300 circles, 600 circles, 900 circles, and the height apart from 2 point of release of strong magnet is that (strong magnet 2 utilizes drawing to 90cm
Rope 3 can be promoted conveniently).Experimental data is recorded in detail such as table 1, in conjunction with table 1, it will be seen from figure 6 that Δ φ/
In the case that Δ t is remained unchanged, induced electromotive force E size is directly proportional to 42 the number of turns N of coil.
Table 1: the relationship of 42 the number of turns N of induced electromotive force and coil when variation rate of magnetic flux Δ φ/Δ t is constant.
Two, control the number of turns N is constant, probes into induced electromotive force and variation rate of magnetic flux Δ φ/Δ t relationship
Strong magnet 2 is fallen from insulated lift pipe 1, successively identical across several the number of turns, the height (itself) of different height
Coil 42, due to coil 42 height d compared to falling height very little, magnet pass through coil 42 Δ t it is minimum, magnetic
The speed for the coil 42 that iron passes through can be replaced with the instantaneous velocity v for reaching coil 42, according to movement of falling object rule v=√
2gh, when the height ratio of several coils 42 is 1:4:9, the ratio between speed is 1:2:3 and Δ t=d/v, then by coil 42 when
Between the ratio between be 3:2:1, the ratio between change rate of magnetic flux be 1:2:3, can thus probe into induced electromotive force and magnetic flux change
The relationship of rate；
Experimentation and data: 42 the number of turns of coil be 900 circles three measuring coils 4, be sequentially sleeved in insulated lift pipe 1 away from
10cm from 2 point of release of strong magnet, 40cm, at 90cm, variation rate of magnetic flux Δ φ when magnet passes through 3 measuring coil 4/
The ratio between Δ t is 1:2:3, is obtained in conjunction with table 2 from Fig. 7, in the case where 42 the number of turns N of coil is certain, the size and Δ of induced electromotive force E
φ/Δ t is directly proportional.
Table 2: induced electromotive force and variation rate of magnetic flux Δ φ/Δ t relationship when the number of turns N is constant
This teaching aid is ingenious in design, " it is big to influence induced electromotive force to probe into the speed of coil 42 is passed through with magnet in teaching material
The experimental program of small factor " is connected, and in conjunction with falling experimental principle, student understands at a glance；Data are accurate, utilize digital display
Voltmeter visuality is good, easy to operate；Compared with DIS experiment external member up to ten thousand easily, computer, cheap, structure is simple,
It is easy to make by oneself and imitated.
Embodiment two
Referring to Fig. 8, different from embodiment one, in order to further increase the accuracy of experiment, the utility model provides another
Several strong magnets 2 are equipped in a kind of improvement structure, specifically insulated lift pipe 1, strong magnet 2 is fixedly connected with insulated lift pipe 1,
Gap is equipped between the insulation tube 41 and insulated lift pipe 1 of measuring coil 4, the bottom of measuring coil 4 is mounted on annular base 6
On, one end of annular base 6 connects slide 8 by connecting rod 7, and slide 8 is mounted on upright slide rail 9 by sliding block, and is connected
The feed screw nut of vertical screw pair 10, upright slide rail 9 and vertical screw pair 10 be it is vertical be mounted on column, vertical screw rod
The output shaft of the bottom end connection wire rod driving motor of the screw rod of pair 10.The rotation of screw rod decelerating motor drives vertical screw pair 10 to rotate
The uniform motion on upright slide rail 9 of slide 8 is driven, and then measuring coil 4 is driven by slide 8, connecting rod 7 and annular base 6
And induced potential measurement plate 5 at the uniform velocity rises or falls.
Further, connection detachable between measuring coil 4 and annular base 6 specifically can be the bottom of measuring coil 4
It is connected by screw between the installation disk 43 and annular base 6 in portion, the screw hole being adapted to it is equipped at the top of annular base 6.
In the present embodiment, experimental method needs are suitably changed, and control magnetic flux quantitative change rate Δ φ/Δ t is constant, are visited
It is equally the measuring coil 4 for replacing three groups of difference the number of turns coils 42, so when studying carefully the relationship of 42 the number of turns N of induced electromotive force and coil
The lifting of 4 constant speed of measuring coil is driven by vertical screw pair 10 afterwards, due to devising multiple strong magnets 2, does not need repeatedly to measure, energy
Obtain multiple groups experimental data.
It is constant to control the number of turns N, when probing into induced electromotive force and variation rate of magnetic flux Δ φ/Δ t relationship, does not need at this time
Replace measuring coil 4, it is only necessary to by vertical screw pair 10 drive measuring coil 4 with friction speed lifting you can get it experiment number
According to.
Measuring coil 4 is driven to obtain stable lifting using vertical screw pair 10, slide 8, annular base 6 after improving
Posture and stable lifting speed will not be rubbed, air drag etc. influences.
Embodiment three
Referring to Fig. 9, unlike embodiment two, in order to improve the stability of the lifting of measuring coil 4, i.e. annular base
6 two sides pass through connecting rod 7 respectively and connect a slide 8, and slide 8 is mounted on upright slide rail 9 by sliding block, one of slide
The feed screw nut of the 8 vertical screw pairs 10 of connection.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (9)
1. Faraday's electromagnetic induction law quantitative demonstrator, which is characterized in that including insulated lift pipe, strong magnet, measuring coil
With induced potential measurement plate, measuring coil is cased on the insulated lift pipe, measuring coil includes the line being wound on insulation tube
Circle, the upper and lower ends setting installation disk of insulation tube, the center for installing disk is equipped with diameter through-hole identical with insulation bore；
Rubber ring is equipped between insulation tube and insulated lift pipe；The side of installation disk is fixedly connected with induced potential measurement plate, induced electricity
Gesture measurement plate includes plate body, and the plate body is equipped with digital voltmeter, power supply, diode, power switch, capacitor and capacitor
Device reset switch, coil, diode, capacitor are sequentially connected in series, capacitor, capacitor reset switch and digital voltmeter
Parallel with one another, voltmeter connects power supply by power switch；The inside of insulated lift pipe is equipped with strong magnet, in the top of strong magnet
The heart is fixedly connected with drawstring.
2. Faraday's electromagnetic induction law quantitative demonstrator according to claim 1, which is characterized in that the insulated lift
Pipe is lucite tube.
3. Faraday's electromagnetic induction law quantitative demonstrator according to claim 1, which is characterized in that the insulated lift
The surface of pipe is equipped with graduation mark.
4. Faraday's electromagnetic induction law quantitative demonstrator according to claim 1, which is characterized in that the measuring coil
Equipped with one or two or it is multiple.
5. Faraday's electromagnetic induction law quantitative demonstrator according to claim 1, which is characterized in that the rubber ring position
In on the bottom of insulation tube.
6. Faraday's electromagnetic induction law quantitative demonstrator according to claim 1, which is characterized in that the strong magnet is set
In in insulator seal tubulature, the upper and lower ends of insulator seal tubulature are equipped with end cap, and the outer diameter of insulator seal tubulature is interior with insulated lift pipe
Diameter diameter is identical.
7. Faraday's electromagnetic induction law quantitative demonstrator according to claim 1, which is characterized in that the insulated lift
Several strong magnets are equipped in pipe, strong magnet is fixedly connected with insulated lift pipe, the insulation tube and insulated lift pipe of measuring coil it
Between be equipped with gap, the bottom of measuring coil is mounted on annular base, and one end of annular base connects slide, cunning by connecting rod
Seat is mounted on upright slide rail by sliding block, and connects the feed screw nut of vertical screw pair, and upright slide rail and vertical screw pair are equal
Be it is vertical be mounted on column, the output shaft of the bottom end connection wire rod driving motor of the screw rod of vertical screw pair.
8. Faraday's electromagnetic induction law quantitative demonstrator according to claim 7, which is characterized in that the measuring coil
The detachable connection between annular base.
9. Faraday's electromagnetic induction law quantitative demonstrator according to claim 7, which is characterized in that the annular base
Two sides connect a slide by connecting rod respectively, and slide is mounted on upright slide rail by sliding block, one of slide connection
The feed screw nut of vertical screw pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820454212.0U CN208521509U (en) | 2018-04-02 | 2018-04-02 | Faraday's electromagnetic induction law quantitative demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820454212.0U CN208521509U (en) | 2018-04-02 | 2018-04-02 | Faraday's electromagnetic induction law quantitative demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208521509U true CN208521509U (en) | 2019-02-19 |
Family
ID=65341635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820454212.0U Expired - Fee Related CN208521509U (en) | 2018-04-02 | 2018-04-02 | Faraday's electromagnetic induction law quantitative demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208521509U (en) |
-
2018
- 2018-04-02 CN CN201820454212.0U patent/CN208521509U/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: 20190219 Termination date: 20200402 |