CN207264642U - Electromagnetic wave teaching experimental provision - Google Patents
Electromagnetic wave teaching experimental provision Download PDFInfo
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- CN207264642U CN207264642U CN201720637362.0U CN201720637362U CN207264642U CN 207264642 U CN207264642 U CN 207264642U CN 201720637362 U CN201720637362 U CN 201720637362U CN 207264642 U CN207264642 U CN 207264642U
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- current detecting
- sensing current
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- detecting subsystem
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Abstract
The utility model discloses a kind of electromagnetic wave teaching experimental provision, including moving coil type microphone, iron core, hot-wire coil, power supply, experimental bench and sensing current detecting system, the sensing current detecting system includes the first sensing current detecting subsystem, second sensing current detecting subsystem, 3rd sensing current detecting subsystem and the 4th sensing current detecting subsystem, the first sensing current detecting subsystem, the second sensing current detecting subsystem, the 3rd sensing current detecting subsystem and the 4th sensing current detecting subsystem include induction coil, micro-current table, weak current amplifier, two-way switch and indicator light.The utility model can reflect hot-wire coil surrounding magnetic field power, people is directly acquainted with branch's situation of hot-wire coil surrounding magnetic field, but also can be produced in induction coil sensing electric current it is smaller when direct viewing to hot-wire coil changes of magnetic field.
Description
Technical field
Experiment device for teaching is the utility model is related to, more particularly, to a kind of electromagnetic wave teaching experimental provision.
Background technology
Magnetic field is a kind of invisible colourless particular matter, and magnetic field is not by atom or molecular composition, but magnetic field is
Objective reality.Magnetic field has the radiation characteristic of wave-particle.There are magnetic field around magnet, the interaction between magnet is exactly with magnetic field
As medium, so two magnets do not have to contact with regard to that can have an effect.It is empty around electric current, moving charge, magnet or changing electric field
Between a kind of existing material of specific form.Since the magnetism of magnet derives from electric current, electric current is the movement of electric charge, thus is summarized
Say that magnetic field is the change by moving charge or electric field and produces in ground.Faraday's electromagnetic induction law and maxwell theory are said
Understand electricity and the relation between magnetic --- the electric field and changing magnetic field of change are inseparable, and how to allow people more directly perceived
Ground understands the relation of electricity and magnetic, and people devise electromagnetic wave experimental provision.And existing experimental provision is only capable of allowing it is seen that electromagnetism
Between relation, but can not reflect the strong and weak difference of hot-wire coil surrounding magnetic field, people can not be allowed to be directly acquainted with hot-wire coil week
The distribution situation in magnetic field is enclosed, and when the sensing electric current produced in induction coil is smaller, people will be unable to direct viewing to magnetic
The change of field.
Utility model content
The utility model aim is to be to provide a kind of electromagnetic wave religion that can reflect hot-wire coil surrounding magnetic field power
Experimental provision is learned, people is directly acquainted with branch's situation of hot-wire coil surrounding magnetic field, but also can sense
Changes of magnetic field of the direct viewing to hot-wire coil when the sensing electric current produced in coil is smaller.
To reach above-mentioned purpose, the utility model uses following technical proposals：Electromagnetic wave teaching experimental provision, including moving-coil
Microphone, iron core, hot-wire coil, power supply, experimental bench and sensing current detecting system, the sensing current detecting system include first
Sense current detecting subsystem, the second sensing current detecting subsystem, the 3rd sensing current detecting subsystem and the 4th induced electricity
Stream detection subsystem, the first sensing current detecting subsystem, the second sensing current detecting subsystem, the 3rd sense
Induced current, which detects subsystem and the 4th sensing current detecting subsystem, includes induction coil, micro-current table, weak current
Amplifier, two-way switch and indicator light, one end of the induction coil are electrically connected with one end of the two-way switch, described two-way
The other end of switch is electrically connected with one end of the micro-current table and one end of the indicator light respectively, the micro-current table it is another
The other end of the other end of one end and the indicator light respectively with the induction coil is electrically connected, the weak current amplifier with
The micro-current table is in parallel；The moving coil type microphone, the hot-wire coil, the power supply are sequentially connected electrically；The hot-wire coil, institute
State induction coil, the indicator light, the two-way switch, the micro-current table and the weak current amplifier and be respectively provided at institute
State in the first plate face of experimental bench, the first sensing current detecting subsystem, the second sensing current detecting subsystem, institute
State the 3rd sensing current detecting subsystem and the 4th sensing current detecting subsystem is set around the hot-wire coil, described the
The induction coil of the induction coil of one sensing current detecting subsystem and the 3rd sensing current detecting subsystem
It is coaxially disposed with the hot-wire coil, the induction coil of the second sensing current detecting subsystem and the 4th sensing
The induction coil of current detecting subsystem is arranged in parallel with the hot-wire coil, and the iron core is located at the hot-wire coil
It is interior.
Above-mentioned electromagnetic wave teaching experimental provision, the indicator light, described in the first sensing current detecting subsystem
The indicator light in the indicator light, the 3rd sensing current detecting subsystem in second sensing current detecting subsystem
Red indicating light, green indicator light, purple are followed successively by with the indicator light in the described 4th sensing current detecting subsystem to refer to
Show lamp and yellow indicator lamp.
Above-mentioned electromagnetic wave teaching experimental provision, further includes electro-acoustic conversion device, the electro-acoustic conversion device, the live wire
Circle and the power supply are sequentially connected electrically.
Above-mentioned electromagnetic wave teaching experimental provision, described second senses the induction coil and institute in current detecting subsystem
The induction coil stated in the 4th sensing current detecting subsystem is symmetrically arranged at the hot-wire coil both sides；First sensing
It is described in the coil turn of the induction coil in current detecting subsystem and the 3rd sensing current detecting subsystem
The coil turn of induction coil than described second sensing current detecting subsystem in the induction coil coil turn and
The coil turn of the induction coil in the 4th sensing current detecting subsystem is more.
The beneficial effects of the utility model are as follows：
1. the utility model is simple in structure, easy to operate, is conducive to teacher and demonstrates electromagnetic conversion on classroom for student.
2. the weak current amplifier in the utility model will can make micro-current table measure produced in sensor circuit it is smaller
Electric current so that the strong and weak change in hot-wire coil magnetic field is found in the change of people's micro-current list index amplitude of oscillation, so that people
Further appreciate that the relation between electromagnetism.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model electromagnetic wave teaching experimental provision.
In figure：1- power supplys；2- moving coil type microphones；3- electro-acoustic conversion devices；4- sound proof boxs；5- experimental benches；6- hot-wire coils；
7- iron cores；8- indicator lights；9- micro-current tables；10- weak current amplifiers；11- two-way switch；12- induction coils；13- first
Sense current detecting subsystem；14- second senses current detecting subsystem；15- the 3rd senses current detecting subsystem；16-
Four sensing current detecting subsystems.
Embodiment
In order to illustrate more clearly of the utility model, the utility model is done into one with reference to preferred embodiments and drawings
The explanation of step.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that below
Specifically described content is illustrative and be not restrictive, and should not limit the scope of protection of the utility model with this.
As shown in Figure 1, the utility model electromagnetic wave teaching experimental provision, including moving coil type microphone 2, iron core 7, hot-wire coil 6,
Power supply 1, experimental bench 5 and sensing current detecting system, the sensing current detecting system include the first sensing current detecting point and are
The sensing current detecting of system 13, second subsystem the 14, the 3rd senses 15 and the 4th sensing current detecting point of current detecting subsystem
System 16, the first sensing current detecting subsystem 13, the second sensing current detecting subsystem 14, the 3rd induced electricity
Stream detection subsystem 15 and the 4th sensing current detecting subsystem 16 include induction coil 12, micro-current table 9, faint
Current amplifier 10, two-way switch 11 and indicator light 8, one end of the induction coil 12 and one end electricity of the two-way switch 11
Connection, the other end of the two-way switch 11 are electrically connected with one end of the micro-current table 9 and one end of the indicator light 8 respectively
Connect, the other end of the micro-current table 9 and the other end of the indicator light 8 are electric with the other end of the induction coil 12 respectively
Connection, the weak current amplifier 10 are in parallel with the micro-current table 9；The moving coil type microphone 2, the hot-wire coil 6, institute
Power supply 1 is stated to be sequentially connected electrically；The hot-wire coil 6, the induction coil 12, the indicator light 8, the two-way switch 11, institute
State micro-current table 9 and the weak current amplifier 10 is respectively provided in the first plate face of the experimental bench 5, first sensing
Current detecting subsystem 13, the second sensing current detecting subsystem 14,15 and of the 3rd sensing current detecting subsystem
The 4th sensing current detecting subsystem 16 is set around the hot-wire coil 6, the first sensing current detecting subsystem 13
The induction coil 12 and the 3rd sensing current detecting subsystem 15 the induction coil 12 and the hot-wire coil 6
It is coaxially disposed, the induction coil 12 of the second sensing current detecting subsystem 14 and the 4th sensing current detecting point
The induction coil 12 of system 16 is arranged in parallel with the hot-wire coil 6, and the iron core 7 is located in the hot-wire coil 6.
Wherein, the induction coil 12 in the second sensing current detecting subsystem 14 and the 4th sensing current detecting point are
The induction coil 12 in system 16 is symmetrically arranged at 6 both sides of hot-wire coil；The first sensing current detecting subsystem 13
In the induction coil 12 coil turn and the 3rd sensing current detecting subsystem 15 in the induction coil 12
Coil turn than the coil turn of the induction coil 12 in the described second sensing current detecting subsystem 14 and described
The coil turn of the induction coil 12 in 4th sensing current detecting subsystem 16 is more.
For the ease of demonstrating and explaining to student, while more intuitively see electromagnetic induction for the ease of student, described the
The finger in the indicator light 8, the second sensing current detecting subsystem 14 in one sensing current detecting subsystem 13
Show lamp 8, the indicator light 8 in the 3rd sensing current detecting subsystem 15 and the 4th sensing current detecting subsystem
The indicator light 8 in 16 is followed successively by red indicating light, green indicator light, purple indicating light and yellow indicator lamp.
And in order to convert sound into the electric current of change in the case where being disturbed without external sound source, the utility model is additionally provided with electroacoustic and turns
Changing device 3, and the electro-acoustic conversion device 3 is located in sound proof box 4, the electro-acoustic conversion device 3, the hot-wire coil 6 and institute
Power supply 1 is stated to be sequentially connected electrically.
In order to demonstrate the hot-wire coil 6 to student, its surrounding, can be successively by institute there are magnetic field under electrical condition
State the first sensing current detecting subsystem 13, the second sensing current detecting subsystem 14, the 3rd sensing current detecting
It is subsystem 15 and the induction coil 12 in the 4th sensing current detecting subsystem 16, the two-way switch 11, described
Indicator light 8, the micro-current table 9 connect according to the connection relation shown in Fig. 1 with the weak current amplifier 10, and pass through institute
Stating two-way switch 11 makes the induction coil 12, the two-way switch 11 and the indicator light 8 connect into sensor circuit path, so
Afterwards when inputting sound by the moving coil type microphone 2, it can be found that the first sensing current detecting subsystem 13, described second
Sensing current detecting subsystem 14, the 3rd sensing current detecting subsystem 15 and the 4th sensing current detecting point are
The indicator light 8 in system 16 can light at the same time, and have also been found that the first sensing current detecting described in four indicator lights 8
The brightness of subsystem 13 and the indicator light 8 in the 3rd sensing current detecting subsystem 15 and second induced electricity
The brightness of stream detection subsystem 14 and the indicator light 8 in the 4th sensing current detecting subsystem 16 difference, from
And it will be seen that 63 surrounding magnetic field of hot-wire coil and non-uniform Distribution.
The 6 surrounding magnetic field non-uniform Distribution of hot-wire coil more clearly is demonstrated to student in order to more directly perceived, can be passed through
The two-way switch 11 amplifies the induction coil 12, the two-way switch 11, the micro-current table 9 and the weak current
Device 10 connects into sensor circuit path, when inputting sound by the moving coil type microphone 2, around described in the hot-wire coil 6 movement
Induction coil 12, at this time it can be found that the throw of the pointer of the micro-current table 9 varies widely, wherein first described in figure
Sense the position residing for the induction coil 12 in the sensing current detecting of current detecting subsystem 13 or described 3rd subsystem 15
When putting, the throw of the pointer of the micro-current table 9 is maximum.
Obviously, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model, for those of ordinary skill in the field, in described above
On the basis of can also make other variations or changes in different ways, all embodiments can not be exhaustive here,
It is every to belong to obvious changes or variations that the technical solution of the utility model is extended out still in the utility model
The row of protection domain.
Claims (2)
1. electromagnetic wave teaching experimental provision, it is characterised in that including moving coil type microphone (2), iron core (7), hot-wire coil (6), power supply
(1), experimental bench (5) and sensing current detecting system, the sensing current detecting system include the first sensing current detecting point and are
Unite (13), the second sensing current detecting subsystem (14), the 3rd sensing current detecting subsystem (15) and the 4th sensing electric current are examined
Survey subsystem (16), the first sensing current detecting subsystem (13), the second sensing current detecting subsystem (14), institute
Stating the 3rd sensing current detecting subsystem (15) and the 4th sensing current detecting subsystem (16) includes induction coil
(12), micro-current table (9), weak current amplifier (10), two-way switch (11) and indicator light (8), the induction coil (12)
One end be electrically connected with one end of the two-way switch (11), the other end of the two-way switch (11) respectively with the micro-current
One end of table (9) and one end of the indicator light (8) are electrically connected, the other end and the indicator light (8) of the micro-current table (9)
The other end of the other end respectively with the induction coil (12) be electrically connected, the weak current amplifier (10) and micro- electricity
Flow table (9) is in parallel；The moving coil type microphone (2), the hot-wire coil (6), the power supply (1) are sequentially connected electrically；The live wire
Enclose (6), the induction coil (12), the indicator light (8), the two-way switch (11), the micro-current table (9) meter and it is described
Weak current amplifier (10) is respectively provided in the first plate face of the experimental bench (5), and the first sensing current detecting point is
Unite (13), the second sensing current detecting subsystem (14), the 3rd sensing current detecting subsystem (15) and described the
Four sensing current detecting subsystems (16) are set around the hot-wire coil (6), the first sensing current detecting subsystem (13)
The induction coil (12) and the 3rd sensing current detecting subsystem (15) the induction coil (12) with it is described logical
Electric coil (6) is coaxially disposed, and the second sensing current detecting point is the induction coil (12) of (14) and the 4th sense
The induction coil (12) of induced current detection subsystem (16) is arranged in parallel with the hot-wire coil (6), and the iron core (7) sets
In the hot-wire coil (6)；The indicator light (8) in first sensing current detecting subsystem (13), described second
Sense the indicator light (8) in current detecting subsystem (14), the institute in the 3rd sensing current detecting subsystem (15)
State the indicator light (8) in indicator light (8) and the 4th sensing current detecting subsystem (16) be followed successively by red indicating light,
Green indicator light, purple indicating light and yellow indicator lamp；Further include electro-acoustic conversion device (3), the electro-acoustic conversion device (3),
The hot-wire coil (6) and the power supply (1) are sequentially connected electrically.
2. electromagnetic wave teaching experimental provision according to claim 1, it is characterised in that the second sensing current detecting point
The induction coil in the induction coil (12) and the 4th sensing current detecting subsystem (16) in system (14)
(12) hot-wire coil (6) both sides are symmetrically arranged at；The line of induction in the first sensing current detecting subsystem (13)
Enclose the coil turn of (12) and the coil turn of the induction coil (12) in the 3rd sensing current detecting subsystem (15)
Number is than the coil turn of the induction coils (12) in the described second sensing current detecting subsystem (14) and described by 4th
The coil turn for sensing the induction coil (12) in current detecting subsystem (16) is more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720637362.0U CN207264642U (en) | 2017-06-02 | 2017-06-02 | Electromagnetic wave teaching experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720637362.0U CN207264642U (en) | 2017-06-02 | 2017-06-02 | Electromagnetic wave teaching experimental provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207264642U true CN207264642U (en) | 2018-04-20 |
Family
ID=61915289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720637362.0U Expired - Fee Related CN207264642U (en) | 2017-06-02 | 2017-06-02 | Electromagnetic wave teaching experimental provision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207264642U (en) |
-
2017
- 2017-06-02 CN CN201720637362.0U patent/CN207264642U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20190602 |
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| CF01 | Termination of patent right due to non-payment of annual fee |