CN211319543U

CN211319543U - Experiment demonstration instrument for measuring electricity and magnetism related physical quantity

Info

Publication number: CN211319543U
Application number: CN201921584829.5U
Authority: CN
Inventors: 黄妙逢; 陈森; 许昊; 程翔; 杨嘉杰
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-08-21
Anticipated expiration: 2029-09-23

Abstract

The utility model provides a measure experiment demonstration appearance of electricity and relevant physical quantity of magnetism belongs to physics demonstration instrument technical field. This experiment demonstration appearance includes the ya keli board, the coil track, the recess track, rectangular coil, the speech control switch, single-pole single-throw switch, battery and strong magnet, and the ya keli board is the base, places coil track and recess track on it, and recess track and coil track link to each other, penetrate rectangular coil in the track, and the other speech control switch and the single-pole single-throw switch of being equipped with of track, the switch passes through the wire and links to each other with the track, and the battery that the strong magnet was inhaled on both sides moves on the track. The test device is an oscilloscope, a current measurer and a teslameter. The experiment demonstration instrument is simple in structure, easy to assemble and operate and low in cost.

Description

Experiment demonstration instrument for measuring electricity and magnetism related physical quantity

Technical Field

The utility model relates to a technical field of electricity and magnetism in the physics especially indicates an experiment demonstration appearance of measuring electricity and the relevant physical quantity of magnetism.

Background

At present, magnetic field distribution, electromagnetic induction law and Lenz law are contents of several electromagnetics which are essential to college physics, almost all college students can learn several knowledge points, most students mainly use learning theories, although the theories are not difficult to master, the theories are combined together to easily confuse concepts, and the dead memory is obviously not an effective method. The magnetic field exists around the electrified lead, the magnetic field distribution outside the coil and inside the coil is judged by a right-hand spiral rule according to the magnetic field direction, and the direction of induced current and the direction of the magnetic field generated by the induced current are drawn according to the electromagnetic induction law. The complex expressions of Lenz's law together with the concepts of ' electromagnetic generation ' and ' magnetic generation ' are the difficult points for learning the theories.

SUMMERY OF THE UTILITY MODEL

The utility model discloses provide a to prior art problem an experiment demonstration appearance of measuring electricity and relevant physical quantity of magnetism. This demonstration appearance application has related to foretell knowledge point that easily obscures in the physics experiment teaching, can carry out the experiment demonstration after the student has carried out corresponding theoretical study, lets the student initiatively go to think and explore the fundamental principle wherein, deepens the understanding to above-mentioned theory, lets the student understand more thoroughly more deeply to knowledge point, is difficult for forgetting.

In order to solve the technical problems, the invention adopts the following technical scheme:

this experiment demonstration appearance includes the ya keli board, the coil track, the recess track, rectangular coil, voice control switch, single-pole single-throw switch, the strong magnet, battery and test instrument, the ya keli board is the base, place coil track and recess track on the ya keli board, recess track and coil track link to each other and form complete ring rail, penetrate rectangular coil in the ring rail, voice control switch and single-pole single-throw switch are equipped with to the track side, voice control switch passes through the wire with single-pole single-throw switch and links to each other with ring rail, the battery that the strong magnet was inhaled on both sides moves on ring rail, test instrument passes through the wire and links to each other with ring rail.

Wherein the thickness of the acrylic plate is 4-7 mm.

The coil track is a curved part of the annular track, and is made by winding a copper wire into a coil and placing the coil in a silicone tube or an acrylic tube; the groove track is a straight line part of the annular track, and is made by winding a copper wire on a silicone tube. The inner diameter of the silica gel tube is 25mm, the outer diameter is 35mm, and the wall thickness is 5 mm.

The rectangular coil is formed by winding enameled wires, and the inner diameter of the rectangular coil is 0.9-1.0 mm.

The copper wires of the coil track and the groove track are both bare copper wires, and the inner diameters of the coil track and the groove track are 0.9-1.0 mm.

The groove track is composed of two silicone tubes wound with spiral tubes or a single silicone tube wound with groove-shaped spiral tubes.

The test instrument comprises an oscilloscope, a current measurer and a teslameter, wherein the oscilloscope is connected with the rectangular coil, and the current measurer is connected with the groove track.

The strong magnet is neodymium iron boron strong magnet with diameter of 18-20mm and a hole in the middle.

The battery is a fifth battery with 1.5V.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

when the experiment demonstration instrument is used in experiment teaching, the experiment demonstration instrument has the advantages of ornamental performance, easiness in operation and the like.

Drawings

Fig. 1 is a schematic structural diagram of the experiment demonstration instrument for measuring electricity and magnetism related physical quantities.

Wherein: the device comprises a 1-acrylic plate, a 2-coil track, a 3-groove track, a 4-rectangular coil, a 5-voice control switch, a 6-single-pole single-throw switch, a 7-testing instrument, an 8-battery and a 9-strong magnet.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model provides an experiment demonstration instrument for measuring electricity and magnetism related physical quantities (such as voltage, current and magnetic field intensity).

As shown in fig. 1, the utility model provides a measure electricity and relevant physical quantity's of magnetism experiment demonstration appearance includes ya keli board 1, coil track 2, recess track 3, rectangular coil 4, voice control switch 5, single-pole single-throw switch 6, strong magnet 9, battery 8 and testing instrument 7, ya keli board 1 is the base, place coil track 2 and recess track 3 on the ya keli board 1, recess track 3 and coil track 2 link to each other and form complete looped rail, penetrate rectangular coil 4 in the looped rail, voice control switch 5 and single-pole single-throw switch 6 are equipped with to the track side, voice control switch 5 passes through the wire with single-pole single-throw switch 6 and links to each other with the looped rail, the battery 8 that attracts strong magnet 9 on both sides moves on the looped rail, testing instrument 7 links to each other with the looped rail through the wire.

In the actual design, the acrylic plate 1 is used as a base, the coil track 2 and the groove track 3 are placed on the acrylic plate, and the groove track 3 is connected with the coil track 2 to form a track. Two rectangular coils 4 are respectively inserted between one groove track 3 and the coil track 2, a single-pole single-throw switch 6 and a voice control switch 5 are connected with one end of the groove track 3 through a conducting wire, an oscilloscope in a test instrument 7 is connected with the rectangular coils 4 through a conducting wire, two strong magnets 9 are respectively attracted to two ends of a 1.5V battery 8, and the same poles N or S of the two magnets face outwards or face inwards.

The working principle is as follows: after the oscilloscope and the voice control switch 5 are connected with a power supply, a battery 8 which is attracted by a strong magnet 9 is put in, so that the small train can be used as a small train, the small train can run on the coil track 2 and the groove track 3, and the small train can be controlled to run or stop at the position where the single-pole single-throw switch 6 is connected with the groove track 3 through the voice control switch 5 and the single-pole single-throw switch 6. When the 'small train' runs close to the rectangular coil 4, a magnetic field is generated due to the fact that currents pass through the 'small train' and the coil track 2 or the groove track 3 connected with the 'small train', the magnetic flux of the rectangular coil 4 is changed, induction current is generated, the voltage value can be measured from the oscilloscope, and the magnitude of the induction current can be obtained through calculation. Because the change rates of the magnetic fluxes are all instantaneous values, the waveform has a plurality of peaks with different heights, two peaks with the largest peak value are found out, the time on the oscilloscope is read, the distance between two rectangular coils 4 is measured, and the speed of the small train can be calculated.

The utility model provides an experiment demonstration appearance need not lead to the electric current for whole track, as long as inhale battery 8 and the track formation closed circuit of strong magnet 9, battery power is sufficient, it will oneself move, only need for equipment such as oscilloscope, speech control switch 5 to lead to the electricity can, can demonstrate many times and can not too much power consumptive in the experiment demonstration in-process. The utility model has the characteristics of easy operation, strong ornamental value, more related physical principles and the like.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An experiment demonstration instrument for measuring electricity and magnetism related physical quantities is characterized in that: the device comprises an acrylic plate (1), a coil track (2), a groove track (3), a rectangular coil (4), a voice control switch (5), a single-pole single-throw switch (6), a strong magnet (9), a battery (8) and a testing instrument (7), wherein the acrylic plate (1) is a base, the coil track (2) and the groove track (3) are placed on the acrylic plate (1), the groove track (3) and the coil track (2) are connected to form a complete annular track, the rectangular coil (4) penetrates into the annular track, the voice control switch (5) and the single-pole single-throw switch (6) are arranged beside the track, the voice control switch (5) and the single-pole single-throw switch (6) are connected with the annular track through a wire, the battery (8) sucking the strong magnet (9) at two sides runs on the annular track, and the testing instrument (7) is connected with the annular track through a wire.

2. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 1 wherein: the thickness of the acrylic plate (1) is 4-7 mm.

3. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 1 wherein: the coil track (2) is a curved part of the annular track, and the coil track (2) is made by winding a copper wire into a coil and placing the coil in a silicone tube or an acrylic tube; the groove track (3) is a straight line part of the annular track, and the groove track (3) is made by winding a copper wire on a silicone tube.

4. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 1 wherein: the rectangular coil (4) is formed by winding an enameled wire, and the inner diameter of the rectangular coil (4) is 0.9-1.0 mm.

5. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 3, wherein: the inner diameter of the silica gel tube is 25mm, the outer diameter is 35mm, and the wall thickness is 5 mm.

6. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 3, wherein: the copper wires of the coil track (2) and the groove track (3) are bare copper wires, and the inner diameters of the coil track (2) and the groove track (3) are 0.9-1.0 mm.

7. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 3, wherein: the groove track (3) is composed of two silica gel tubes wound with spiral tubes or a single silica gel tube wound with groove-shaped spiral tubes.

8. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 1 wherein: the testing instrument comprises an oscilloscope, a current measurer and a Tesla meter, wherein the oscilloscope is connected with the rectangular coil (4), and the current measurer is connected with the groove track (3).

9. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 1 wherein: the strong magnet (9) is a neodymium iron boron strong magnet, the diameter of the strong magnet is 18-20mm, and the middle of the strong magnet is provided with a hole.

10. An experimental demonstration apparatus for measuring an electrical and magnetic related physical quantity according to claim 1 wherein: the battery (8) is a fifth battery with 1.5V.