CN214897198U

CN214897198U - Lenz law demonstration instrument

Info

Publication number: CN214897198U
Application number: CN202121315651.1U
Authority: CN
Inventors: 张一�; 郭威良; 高祎康; 黄家钟; 李东洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-11-26
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to the field of teaching articles, in particular to a Lenz's law demonstration instrument, which comprises a base and a workbench arranged on the base, wherein an air cushion guide rail is arranged on the table surface of the workbench, the air cushion guide rail is fixedly arranged on the table surface of the workbench, a bar-shaped magnet and a spiral metal coil are arranged on the air cushion guide rail, a photoelectric gate is erected on the air cushion guide rail, the bar-shaped magnet can pass through the photoelectric gate and the spiral metal coil to slide back and forth on the air cushion guide rail, a current sensor, a DIS data collector and a computer are arranged on the workbench, the computer is connected with the DIS data collector, the spiral metal coil is connected with the current sensor, the current sensor is connected with the DIS data collector, the photoelectric gate is connected with the DIS data collector, and the technical problem that the teaching demonstration instrument in the prior art only stays on a surface layer for demonstration experiments is solved, so as to lead students to know the principle of Lenz law more accurately and deeply.

Description

Lenz law demonstration instrument

Technical Field

The utility model relates to a teaching articles for use field especially relates to a lenz's law demonstration appearance.

Background

The Lenz's law is an important component of high school physics, which only uses a subsection to explain phenomena and causes of the Lenz's law, but as an important component of high school teaching, it is important to explain the experimental principle and research in detail to students by experiments, and the students can understand more deeply by means of experiments.

Through the study on Lenz law, students can better understand the mutual relation between magnetism and electricity and the internal relation between the magnetism and the electricity, on one hand, the students can review and perfect the previously learned knowledge on the aspects of magnetism and electricity through the study on Lenz law, and on the other hand, the students lay a foundation for the later study and understanding of the mutual action between magnetism and electricity.

The conventional lenz law demonstration teaching aid can only reflect the effect of induced current and always resist the reason causing the induced current and judge the direction of electromotive force generated by electromagnetic induction, cannot quantitatively explore specific influence factors, and cannot further study and explore by qualitative experimental students. The prior teaching aid is only a surface layer demonstration experiment, so that students are difficult to deeply explore the learning space, and a novel teaching aid is urgently needed to be invented.

The invention patent with Chinese patent application number 202010734664.6 discloses an integrated lenz law demonstration instrument, which comprises a base, a coil rack and a bar magnet, wherein the coil rack is fixedly connected to one side of the base, a coil and an outer shaft pipe are arranged on the coil rack, an inner shaft pipe is arranged in the outer shaft pipe, a turntable is arranged at the outer end of the inner shaft pipe, direction signs of induced current and magnetic field in the coil are marked on the turntable, and a gear is arranged at the inner end of the inner shaft pipe; a guide rail is arranged on the other side of the base, the bar magnet is arranged on the guide rail, a cross shaft is arranged at the left end of the bar magnet, a rotating plate is arranged on the cross shaft, and two racks are respectively arranged on two sides of the rotating plate; the inner shaft tube is internally provided with a rotating shaft, the inner end of the rotating shaft is provided with a magnetic strip control rod, the outer end of the rotating shaft is provided with a rotating window, and a window on the rotating window is matched with the direction sign on the turntable. Because the invention is an integrated structure, the complicated process of assembling, demonstrating and disassembling is avoided, and the direction of the current and the magnetic field induced in the coil when the magnetic flux changes is displayed on the rotating window only by pushing or pulling the bar magnet into the coil rack during operation. However, the invention is only a surface layer demonstration experiment, so that students are difficult to have a deeper study space.

SUMMERY OF THE UTILITY MODEL

Therefore, to foretell problem, the utility model provides a lenz law demonstration appearance solves prior art teaching demonstration appearance and only stops in the technical problem of top layer demonstration experiment to let the principle of the more accurate deeper understanding lenz law of student.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a lenz's law demonstration appearance, includes the base, sets up the workstation on the base, be provided with air track on the mesa of workstation, air track fixed set up in the mesa of workstation, be provided with bar magnet and spiral metal coil on the air track, air track is put on the shelf and is equipped with the photogate, bar magnet can pass the photogate with spiral metal coil is in the slip of making a round trip on the air track, be provided with current sensor, DIS data collection station and computer on the workstation, the computer with DIS data collection station is connected, spiral metal coil with current sensor is connected, current sensor with DIS data collection station is connected, the photogate with DIS data collection station is connected.

Further, the current sensor, the DIS data collector and the computer are arranged around the air cushion guide rail in a surrounding mode.

Further, the overall length of the air cushion guide rail is 18 cm-20 cm.

Further, the height of the photoelectric gate is 10cm to 15 cm.

Further, the photoelectric door is arranged at the center of the air cushion guide rail.

Further, the lower surface of base is provided with the rubber pad, the rubber pad set up in four edges of the lower surface of base.

By adopting the technical scheme, the beneficial effects of the utility model are that:

1. air cushion rail is fixed to be set up on the workstation, has guaranteed that bar magnet back and forth movement's on air cushion rail in-process air cushion rail can not produce and rock, through being provided with current sensor, DIS data collection station and computer, conveniently gathers and the analysis to data, through being provided with the computer, can be with bar magnet on the screen of computer through photoelectric door and spiral metal coil's all kinds of data direct reaction, whole more directly perceived and data analysis is more accurate.

2. Will current sensor, DIS data collection station and computer encircle set up in around the air track, put through the reasonable position of each accessory, neither can produce the process and the principle of conveniently watching the research experiment by the student simultaneously to the work of whole instrument and interfere.

3. The whole length of the air cushion guide rail is set to be 18 cm-20 cm, so that the air cushion guide rail does not occupy too large use area, and meanwhile, the workbench is convenient to place on a teaching desktop.

4. The height of the photoelectric gate is 10cm to 15cm, and reasonable height can ensure that the strip-shaped magnet collects data through the photoelectric gate.

5. The lower surface of base is provided with the rubber pad, the rubber pad set up in four edges of the lower surface of base department avoids the instrument to cause wearing and tearing to the surface of teaching desktop.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic top view of the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 2, the first embodiment provides a lenz's law demonstrator, which includes a base 1 and a workbench 2 disposed on the base 1, an air cushion guide rail 3 is disposed on a table top of the workbench 2, the air cushion guide rail 3 is fixedly disposed on the table top of the workbench 2, a bar magnet 31 and a spiral metal coil 33 are disposed on the air cushion guide rail 3, a photoelectric gate 32 is disposed on the air cushion guide rail 3, the bar magnet 31 can pass through the photoelectric gate 32 and the spiral metal coil 33 to slide back and forth on the air cushion guide rail 3, a current sensor 4, a DIS data collector 6 and a computer 5 are disposed on the workbench 2, the computer 5 is connected to the DIS data collector 6, the spiral metal coil 33 is connected to the current sensor 4, and the current sensor 4 is connected to the DIS data collector 6, the photoelectric door 32 is connected with the DIS data collector 6, the current sensor 4, the DIS data collector 6 and the computer 5 are arranged around the air cushion guide rail 3 in a surrounding mode, the whole length of the air cushion guide rail 3 is 18cm, the photoelectric door 32 is arranged at the center of the air cushion guide rail 3, the height of the photoelectric door 32 is 10cm, the rubber pads 7 are arranged on the lower surface of the base 1, and the rubber pads 7 are arranged at four corners of the lower surface of the base 1.

The length of the air cushion guide rail 3 can be any value between 18cm and 20cm, such as 19cm or 20cm, the height of the photoelectric door 32 can be any value between 10cm and 15cm, such as 13cm or 15cm, the DIS data collector 6 is a known device in the electrical field, specifically a device combining a displacement sensor, a data collector and a microcomputer, and is not described herein in detail.

The utility model discloses a working method does: before the experiment, the computer 5 is in a state of data to be collected, when the experiment is started, the bar magnet 31 is pushed by hand, the bar magnet 31 has an initial speed and passes through the photoelectric door 32 and the spiral metal coil 33, when the bar magnet 31 passes through the photoelectric door 32, the collected signal of the photoelectric door 32 is transmitted into the computer 5, the speed of the bar magnet 31 is obtained by direct processing of software of the computer 5, when the bar magnet 31 passes through the spiral metal coil 33, the collected signal of the spiral metal coil 33 is transmitted into the DIS data collector 6, the DIS data collector 6 collects data and transmits the data to the computer 5, the current of the spiral metal coil 33 is calculated, then the initial speed and the number of the bar magnet 31 are changed to repeat the above operations, the computer 5 analyzes and processes a plurality of groups of generated data, and a generated mechanical image graph can be directly reflected on a display screen of the computer 5, in the process, the student can carry out close-range observation and analysis on the data in the whole process, so that the Lenz law can be deeply understood.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a lenz's law demonstration appearance, includes the base, sets up the workstation on the base, its characterized in that: the table top of the workbench is provided with an air cushion guide rail, the air cushion guide rail is fixedly arranged on the table top of the workbench, a bar magnet and a spiral metal coil are arranged on the air cushion guide rail, a photoelectric door is erected on the air cushion guide rail, the bar magnet can penetrate through the photoelectric door and the spiral metal coil to slide back and forth on the air cushion guide rail, a current sensor, a DIS data collector and a computer are arranged on the workbench, the computer is connected with the DIS data collector, the spiral metal coil is connected with the current sensor, the current sensor is connected with the DIS data collector, and the photoelectric door is connected with the DIS data collector.

2. The Lenz's law demonstrator according to claim 1, wherein: the current sensor, the DIS data collector and the computer are arranged around the air cushion guide rail in a surrounding mode.

3. The Lenz's law demonstrator according to claim 1, wherein: the overall length of the air cushion guide rail is 18 cm-20 cm.

4. The Lenz's law demonstrator according to claim 1, wherein: the height of the photoelectric gate is 10cm to 15 cm.

5. The Lenz's law demonstrator according to claim 4, wherein: the photoelectric door is arranged in the center of the air cushion guide rail.

6. A Lenz's law demonstrator according to any one of claims 1 to 5, wherein: the lower surface of base is provided with the rubber pad, the rubber pad set up in four edges of the lower surface of base department.