CN209746892U - Experimental system for demonstrating Biao-Safaer law - Google Patents
Experimental system for demonstrating Biao-Safaer law Download PDFInfo
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- CN209746892U CN209746892U CN201821800887.2U CN201821800887U CN209746892U CN 209746892 U CN209746892 U CN 209746892U CN 201821800887 U CN201821800887 U CN 201821800887U CN 209746892 U CN209746892 U CN 209746892U
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Abstract
The utility model discloses an experimental system for demonstrating the biot-sakaval law, including box, control panel, air track, gas compressor, magnetism slider, static carousel, brush and static electrification ware. The utility model has the advantages of through an experimental system who demonstrates the law of the biot-sakaval, make annular current in order to arouse magnetic field according to the rotation of electrified disc to promote the magnet and slide and reach the effect of demonstrating the law of the biot-sakaval. The instrument is simple to operate, vividly demonstrates the characteristics of the current excitation magnetic field, can excite the learning interest of students, arouses the learning desire of the students, cultivates the scientific experiment literacy of the students, and effectively cultivates the observation ability and practical ability of the students.
Description
Technical Field
the utility model relates to a physics demonstration experiment technical field, concretely relates to demonstration biot-sakaval law's experimental system.
background
The biot-saxafarl law is an important law in electromagnetism that explains the quantitative relationship between current and the magnetic field it excites. This law states that: the magnetic induction intensity generated by a section of current element at a certain point is in direct proportion to the size of the current element, in direct proportion to the sine of an included angle between the current element and the vector of the current element to the point, and in inverse proportion to the square of the current element to the point, and then according to the superposition principle, the total magnetic field of the point is the vector sum of the magnetic fields generated by the current elements at the point. In the form of current generation, current may be present in the wire or may be generated by the movement of electrostatic charges. For example, an electrically charged disc generates an electric current on the surface of the rotating disc when rotating around the axis, and the intensity of the electric current varies with the rotation speed of the disc, thereby generating a magnetic field around the disc. To directly observe the presence or absence and intensity of a magnetic field, it is necessary to use the mechanical behavior. Since the magnet can be acted upon by a force in the region having the magnetic field gradient, the generation and variation of the magnetic field is represented by the movement of the magnet under the action of the magnetic field force. In addition, establish the demonstration effect of frictionless environment further reinforcing experiment, air track can make magnet suspension, and a very weak magnetic field force all can make it move to it is more obvious to make the experimental phenomenon.
Because the Biot-Safaer law is expressed by mathematics and is difficult to understand, an interesting experimental system is designed to show that the law of the current excitation magnetic field is an indispensable component in the course of college physics classroom teaching, can excite the learning interest of students, arouse the learning desire of the students, cultivate the scientific experimental literacy of the students, and effectively cultivate the observation ability and practical and manual ability of the students. The design of the system needs to be simple in structure, simple and convenient to operate, and vivid and interesting. The utility model discloses use rotatory static carousel and air track to design the experimental system of demonstration biot-sakaval law as the main part device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an experimental system of demonstration biot-sakaval law, its rotation according to electrified disc makes annular current in order to arouse magnetic field to promote magnet slip and reach the effect of demonstration biot-sakaval law.
the utility model discloses a following technical scheme realizes above-mentioned purpose:
An experimental system for demonstrating the Biao-Saval law comprises a box body, a control panel, an air cushion guide rail, a gas compressor, a magnetic slider, an electrostatic turntable, an electric brush and an electrostatic generator;
The box is assembled by transparent shrouding and is formed, and the top shrouding of box establishes to openable structure, control panel establishes on one of them side shrouding of box, the air cushion guide rail transversely establishes inside the box, gas compressor is connected with the air cushion guide rail for provide the air supply for the air cushion guide rail, the activity of magnetism slider sets up on the air cushion guide rail, the static carousel has two, opposites respectively and establishes in the first department in the both ends of air cushion guide rail, and makes the air cushion guide rail be located the centre of a circle line of two static carousels, the brush has two, contacts with the interior dish face of two static carousels respectively, the static electrification ware passes through the wire and is connected with two brushes respectively.
the further improvement lies in that a power switch for controlling the on-off of the power supply of the experimental system, a reverse switch for controlling the rotation direction of the electrostatic turntable, a rotating speed adjusting knob for adjusting the rotation speed of the electrostatic turntable and an electric quantity adjusting knob for adjusting the output electric quantity of the electrostatic generator are arranged on the control panel.
the air cushion guide rail is further improved in that the air cushion guide rail is composed of a hollow triangular prism body and two baffles, the hollow triangular prism body is of an aluminum sealing structure, one side surface of the hollow triangular prism body faces downwards horizontally, an air inlet hole is formed in the side surface and used for being connected with a gas compressor, a plurality of rows of fine air outlet holes are formed in the other two side surfaces of the hollow triangular prism body, and the two baffles are respectively arranged on the bottom surfaces of the two ends of the hollow triangular prism body;
The magnetic sliding block is composed of a V-shaped sliding sheet and a bar magnet, the V-shaped sliding sheet is reversely buckled on a hollow triangular prism body of the air-cushion guide rail, and the bar magnet is arranged at the upper end of the V-shaped sliding sheet along the direction parallel to the air-cushion guide rail.
the further improvement lies in that the cross section of the hollow triangular prism is in an equilateral triangle shape, and the opening angle of the V-shaped sliding sheet is 60 degrees.
The further improvement is that the bar magnet is provided with N pole and S pole marks.
The improved structure of the static turntable is characterized in that the static turntable comprises a rotating motor, an insulating turntable, color blocks and round thin copper sheets, an output shaft of the rotating motor horizontally faces the inner side of the box body, the insulating turntable is connected to the output shaft of the rotating motor, the color blocks are marked on the circumferential edge of the insulating turntable, the radiuses of the round thin copper sheets and the insulating turntable are the same, and the round thin copper sheets are attached to the inner disk surface of the insulating turntable.
The beneficial effects of the utility model reside in that: the utility model discloses an experimental system for demonstrating the law of biot-sakaval makes annular current in order to arouse magnetic field according to the rotation of electrified disc to promote the magnet and slide and reach the effect of demonstrating the law of biot-sakaval. The instrument is simple to operate, vividly demonstrates the characteristics of the current excitation magnetic field, can excite the learning interest of students, arouses the learning desire of the students, cultivates the scientific experiment literacy of the students, and effectively cultivates the observation ability and practical ability of the students.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the construction of an air track;
FIG. 3 is a schematic structural view of a magnetic slider;
FIG. 4 is a schematic structural diagram of an electrostatic turntable;
In the figure: 1-box, 2-control panel, 21-power switch, 22-reversing switch, 23-rotating speed adjusting knob, 24-electric quantity adjusting knob, 3-air cushion guide rail, 31-hollow triangular prism, 32-baffle, 33-air inlet hole, 34-air outlet hole, 4-gas compressor, 5-magnetic slider, 51-V-shaped sliding sheet, 52-bar magnet, 6-electrostatic rotary table, 61-rotary motor, 62-insulating rotary table, 63-color block, 64-round thin copper sheet, 7-electric brush and 8-electrostatic starter.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Referring to fig. 1 to 4, an example structure of an experimental system for demonstrating the biot-sakaval law includes a box 1, a control panel 2, an air-cushion rail 3, a gas compressor 4, a magnetic slider 5, an electrostatic turntable 6, an electric brush 7, and an electrostatic generator 8. The box body 1 is formed by assembling transparent seal plates, the top seal plate of the box body 1 is arranged to be of an openable structure and can be opened manually, the control panel 2 is arranged on one seal plate on one side of the box body 1, the air cushion guide rail 3 is transversely arranged in the box body 1, the gas compressor 4 is connected with the air cushion guide rail 3 and used for providing a gas source for the air cushion guide rail 3, the magnetic slide block 5 is movably arranged on the air cushion guide rail 3, the two electrostatic rotary tables 6 are respectively and oppositely arranged at two ends of the air cushion guide rail 3, and the air cushion guide rail 3 is positioned on a circle center connecting line of the two electrostatic rotary tables 6; the number of the electric brushes 7 is two, the electric brushes are respectively contacted with the inner disc surfaces of the two electrostatic turntables 6, and the electrostatic starter 8 is respectively connected with the two electric brushes 7 through a conducting wire. After the experimental system is powered on, the two electrostatic turntables 2 form a ring current generation system, and the electrostatic starter 8 and the electric brush 7 are used as an electrostatic supply system.
The control panel 2 is provided with a power switch 21 for controlling the on-off of the power supply of the experimental system, a reversing switch 22 for controlling the rotation direction of the electrostatic turntable 6, a rotating speed adjusting knob 23 for adjusting the rotation speed of the electrostatic turntable 6, and an electric quantity adjusting knob 24 for adjusting the electric quantity output by the electrostatic initiator 8.
The air cushion guide rail 3 is composed of a hollow triangular prism 31 and a baffle 32, the hollow triangular prism 31 is an aluminum sealing structure, one side surface of the hollow triangular prism 31 faces downwards horizontally, an air inlet 33 with a larger aperture is formed in the side surface and is used for connecting the gas compressor 4, and a plurality of rows of fine air outlet holes 34 are formed in the other two side surfaces of the hollow triangular prism 31, wherein the rows of fine air outlet holes are generally three; two baffles 32 are respectively arranged on the bottom surfaces of two ends of the hollow triangular prism 31 and used for installing the hollow triangular prism 31 and protecting the magnetic slide block 5 from sliding off; the magnetic slider 5 is composed of a V-shaped sliding sheet 51 and a bar magnet 52, the V-shaped sliding sheet 51 is reversely buckled on the hollow triangular prism 31 of the air-cushion guide rail 3, and the bar magnet 52 is arranged at the upper end of the V-shaped sliding sheet 51 along the direction parallel to the air-cushion guide rail 3.
the cross section of the hollow triangular prism 31 is an equilateral triangle, and the opening angle of the V-shaped sliding piece 51 is 60 °. When the air outlet 34 is used for air injection, an upward driving force for the V-shaped sliding sheet 51 can be formed, a layer of air cushion is formed on the contact surface, the magnetic sliding block 5 is suspended or close to a suspended state, and the influence of friction force on an experiment is reduced. The bar magnet 52 is provided with N and S pole designations to distinguish the north and south poles of the magnet.
The electrostatic rotary disc 6 is composed of a rotary motor 61, an insulating rotary disc 62, a color block 63 and a round thin copper sheet 64, wherein the rotary motor 61 is a variable speed direct current motor capable of rotating bidirectionally, an output shaft of the rotary motor 61 horizontally faces the inner side of the box body 1, the insulating rotary disc 62 is connected to the output shaft of the rotary motor 61, the color block 63 is marked on the circumferential edge of the insulating rotary disc 62, the radius of the round thin copper sheet 64 is the same as that of the insulating rotary disc 62, and the round thin copper sheet 64 is attached to the inner disc surface of the insulating rotary disc.
When the experimental system is used for carrying out demonstration experiments, the experimental system comprises the following steps:
step one, opening a gas compressor 4 to enable gas to be sprayed out from the upper end of the air cushion guide rail 3, then opening a top sealing plate of the box body 1, placing a magnetic slider 5 at one third of the air cushion guide rail 3, and covering the top sealing plate;
Step two, turning on the power supply of the experimental system through the power switch 21 on the control panel 2, so that the electrostatic starter 8 starts to supply power to the electrostatic turntables 6, meanwhile, the two electrostatic turntables 6 start to rotate, a magnetic field is generated between the two electrostatic turntables 6, and the magnetic slide block 5 starts to slide under the action of the magnetic field force;
Step three, when the magnetic slide block 5 slides to one side of the air cushion guide rail 3, the two electrostatic turntables 6 are controlled to rotate reversely through a reverse switch 22 on the control panel 2, the magnetic field is reversed, and the magnetic slide block 5 moves reversely;
Step four, adjusting the output electric quantity of the electrostatic starter 8 through an electric quantity adjusting knob 24 on the control panel 2, repeating the step three, and observing the movement of the magnetic slider 5;
fifthly, adjusting the rotating speed of the electrostatic turntable 6 through a rotating speed adjusting knob 23 on the control panel 2, repeating the third step, and observing the movement of the magnetic slider 5;
and step six, closing the power supply of the experimental system through the control panel 2, opening the top sealing plate of the box body 1, taking out the magnetic slide block 5, closing the gas compressor 4, covering the top sealing plate, and ending the experiment.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (6)
1. An experimental system for demonstrating the biot-sakaval law is characterized in that: the device comprises a box body (1), a control panel (2), an air cushion guide rail (3), a gas compressor (4), a magnetic slider (5), an electrostatic turntable (6), an electric brush (7) and an electrostatic starter (8);
the box body (1) is formed by splicing transparent seal plates, the top seal plate of the box body (1) is of an openable and closable structure, the control panel (2) is arranged on one side sealing plate of the box body (1), the air cushion guide rail (3) is transversely arranged in the box body (1), the air compressor (4) is connected with the air cushion guide rail (3), used for providing an air source for the air cushion guide rail (3), the magnetic slide block (5) is movably arranged on the air cushion guide rail (3), two electrostatic turntables (6) are respectively and oppositely arranged at the two ends of the air cushion guide rail (3), and the air cushion guide rail (3) is positioned on the circle center connecting line of the two electrostatic turntables (6), the two electric brushes (7) are respectively contacted with the inner disc surfaces of the two electrostatic turntables (6), the electrostatic starter (8) is respectively connected with the two electric brushes (7) through leads.
2. An experimental system for demonstrating the biot-sakaval law according to claim 1, wherein: and the control panel (2) is provided with a power switch (21) for controlling the on-off of a power supply of the experimental system, a reversing switch (22) for controlling the rotating direction of the electrostatic turntable (6), a rotating speed adjusting knob (23) for adjusting the rotating speed of the electrostatic turntable (6), and an electric quantity adjusting knob (24) for adjusting the output electric quantity of the electrostatic starter (8).
3. An experimental system for demonstrating the biot-sakaval law according to claim 1, wherein: the air cushion guide rail (3) is composed of a hollow triangular prism body (31) and two baffles (32), the hollow triangular prism body (31) is of an aluminum sealing structure, one side surface of the hollow triangular prism body (31) faces downwards horizontally, an air inlet hole (33) is formed in the side surface and used for being connected with a gas compressor (4), a plurality of rows of fine and dense air outlet holes (34) are formed in the other two side surfaces of the hollow triangular prism body (31), and the two baffles (32) are respectively arranged on the bottom surfaces of the two ends of the hollow triangular prism body (31);
Magnetic sliding block (5) comprise V-arrangement gleitbretter (51) and bar magnet (52), V-arrangement gleitbretter (51) back-off is on air track guide rail's (3) cavity triangular prism body (31), bar magnet (52) are established in V-arrangement gleitbretter (51) upper end along the direction that is on a parallel with air track guide rail (3).
4. an experimental system for demonstrating the biot-sakaval law according to claim 3, wherein: the cross section of the hollow triangular prism (31) is in an equilateral triangle shape, and the field angle of the V-shaped sliding sheet (51) is 60 degrees.
5. an experimental system for demonstrating the biot-sakaval law according to claim 3, wherein: the bar magnet (52) is provided with N-pole and S-pole marks.
6. an experimental system for demonstrating the biot-sakaval law according to claim 1, wherein: the electrostatic rotary table (6) is composed of a rotary motor (61), an insulating rotary table (62), a color block (63) and a round thin copper sheet (64), an output shaft of the rotary motor (61) horizontally faces the inner side of the box body (1), the insulating rotary table (62) is connected to the output shaft of the rotary motor (61), the color block (63) is marked on the circumferential edge of the insulating rotary table (62), the radius of the round thin copper sheet (64) is the same as that of the insulating rotary table (62), and the round thin copper sheet (64) is attached to the inner disc surface of the insulating rotary table (62).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821800887.2U CN209746892U (en) | 2018-11-02 | 2018-11-02 | Experimental system for demonstrating Biao-Safaer law |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821800887.2U CN209746892U (en) | 2018-11-02 | 2018-11-02 | Experimental system for demonstrating Biao-Safaer law |
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| CN209746892U true CN209746892U (en) | 2019-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285431A (en) * | 2018-11-02 | 2019-01-29 | 安徽新华学院 | A kind of demonstration Biot-Sa farr's law experimental system and experimental method |
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2018
- 2018-11-02 CN CN201821800887.2U patent/CN209746892U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285431A (en) * | 2018-11-02 | 2019-01-29 | 安徽新华学院 | A kind of demonstration Biot-Sa farr's law experimental system and experimental method |
| CN109285431B (en) * | 2018-11-02 | 2023-11-21 | 安徽新华学院 | Experimental system and experimental method for demonstrating Biaoo-Safire law |
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