CN217484999U

CN217484999U - Ampere force demonstration device

Info

Publication number: CN217484999U
Application number: CN202221023473.XU
Authority: CN
Inventors: 吴育吉; 黄多智; 杨漪; 陆银琳; 蒙荣海; 张宽金; 彭俊铭; 瞿中华
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-09-23
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses an ampere force demonstration device, which comprises a bracket, a support body and a spring, wherein the bracket is the support body; a force sensor disposed above the support; an energized conductor suspended below the force sensor; the electromagnet group is arranged below the force sensor, and the electrified conducting wire is vertically arranged in a uniform magnetic field generated by the electromagnet group; the first power supply and the first current detection device are connected with the electromagnet group in series, and the first power supply is a variable power supply; a second power source, a second current sensing device and the sliding rheostat connected in series with the energizing wire. The utility model discloses can be effectively quantitative measurement ampere force respectively with circular telegram wire electric current, length and the relation between the magnetic field.

Description

Ampere force demonstration device

Technical Field

The utility model relates to an experimental device field particularly, especially relates to an ampere force presentation device.

Background

The force of the magnetic field on the current is commonly referred to as an ampere force; this is to memorialize the french physicist ampere (1775-. The ampere force is the acting force of the electrified lead in the magnetic field; the calculation formula of the magnitude of the ampere force F received in the uniform magnetic field B is as follows: f = ILB; the direction of the ampere force is determined by the left-hand rule.

In the prior art, demonstration of the magnitude of the ampere force is a difficult point in physical teaching, although the formula F = ILB shows that the magnitude of the ampere force is related to the magnetic field intensity, the magnitude of the current and the length of a power-on conducting wire, the relationship between the magnitude of the ampere force and the current and the magnetic induction intensity in a textbook can only be compared through qualitative experiments, and quantitative experiments cannot be used for analysis; the left-hand rule reflects the direction of the current, the magnetic field, and the ampere force. However, the magnetic field is invisible and untouchable, so that the magnetic field is very abstract for students; although the ampere force can be measured, the ampere force is too small, equipment in a physical laboratory of a school cannot measure the ampere force at all, and a layer of mysterious veil is covered on the ampere force. The existing ampere force demonstration equipment generally adopts a U-shaped magnet as an electrified lead, so that the magnetic field force is small, the phenomenon is not obvious, and students cannot observe easily; although the current in the electrified lead can be changed, the magnetic induction intensity cannot be changed, and the relationship between the ampere force and the magnetic induction intensity cannot be quantitatively explained; meanwhile, the U-shaped magnet is adopted for demonstration, which can only qualitatively explain the relationship between the magnitude of the ampere force and the magnitude of the current and cannot quantitatively explain the quantitative relationship between the magnitude of the ampere force and the magnitude of the current. Therefore, it is important to conveniently measure the ampere force and demonstrate the relationship among the ampere force, the magnetic field strength, the current magnitude and the length of the conducting wire. Therefore, in view of the defects of the above solutions in actual manufacturing and implementation, the present invention provides an ampere force demonstration device to solve the above problems, which is based on the spirit and concept, with the assistance of professional knowledge and experience, and after many kinds of puzzles and experiments, the present invention is created.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ampere force presentation device to solve above-mentioned problem.

The utility model relates to an ampere force presentation device can realize through following technical scheme:

the utility model relates to an ampere force demonstration device, which comprises a bracket, which is a supporting main body; a force sensor disposed above the support; an energized conductor suspended below the force sensor; the power-on conducting wire is vertically arranged in a uniform magnetic field generated by the electromagnet group; the first power supply and the first current detection device are connected with the electromagnet group in series, and the first power supply is a variable power supply; a second power source, a second current sensing device and the sliding rheostat connected in series with the energizing wire.

In one embodiment, the support is a wooden support, two layers of support plates are arranged above and below the wooden support, the two support plates are horizontally arranged and parallel, the force sensor is horizontally arranged on the upper support plate, and the electromagnet group is horizontally arranged on the lower support plate.

In one embodiment, the energizing wire is a rectangular coil, the bottom edges of the rectangular coil are all vertically arranged in the electromagnet group, and the rectangular coil is suspended below the force sensor through a thin wire.

In one embodiment, the electromagnet group comprises two electromagnets, and the two electromagnets are horizontally arranged in parallel.

In one embodiment, the electromagnet includes a housing and a magnetic core, the housing is formed by two plastic sheets symmetrically, and the magnetic core is disposed between the two plastic sheets and is connected in series with the first power source and the first current detection device, respectively.

In one embodiment, the magnetic core is formed by sequentially arranging and overlapping a plurality of silicon steel sheets, and copper enameled wires are wound on the silicon steel sheets.

In one embodiment, the first power supply is a voltage-adjustable transformer.

In one embodiment, a rectifier is disposed at the back end of the first power source.

In one embodiment, the first current detection device and the second current detection device are an ammeter or a multimeter.

In one embodiment, the second power source is a student power source.

Compared with the prior art, the utility model relates to an ampere force presentation device's beneficial effect does:

the utility model discloses an ampere force demonstration device, which can quantitatively verify the relationship between the length of a power-on wire and the ampere force by changing the length of the power-on wire and simultaneously keeping the current and the magnetic field in the power-on wire unchanged and observing the numerical value change of a force sensor in real time; the resistance value of the slide rheostat is changed, so that the current in the electrified lead is changed, the length of the electrified lead and the magnetic field are unchanged, and the relationship between the current in the electrified lead and the ampere force can be quantitatively verified by observing the numerical value change of the force sensor in real time; the magnitude of a uniform magnetic field generated by the electromagnet group is changed by changing the voltage of the first power supply, the length of the electrified lead and the magnitude of current flowing through the electrified lead are unchanged, and the relationship between the magnitude of the magnetic field and the ampere force can be quantitatively verified by observing the numerical value change of the force sensor in real time; simultaneously the utility model discloses a measuring part all be laboratory equipment, and connection structure is simple, has certain practicality and teaching and promotes the potentiality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of the components of an ampere force demonstration device of the present invention.

FIG. 2 is a schematic diagram showing the relationship between the ampere force and the length of the electrified wire in the uniform magnetic field of the electrified wire in the ampere force demonstration device shown in FIG. 1;

fig. 3 is a schematic diagram showing the relationship between the ampere force of the current-carrying wire in the uniform magnetic field and the current in the current-carrying wire in the ampere force demonstration apparatus shown in fig. 1.

The following are marked in the figure: 11, a bracket; 12, a force sensor; 13, electrifying the lead; 14, electromagnet groups; 141, a housing; 142, a magnetic core; 15, a first power supply; 151, a rectifier; 16, a first current detection device; 17, a second power supply; 18, a second current detection device; and 19, sliding the rheostat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships usually placed when the products of the present invention are used, and are only for convenience of description and simplification of the description, but not for indicating or implying that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention.

Further, in the present disclosure, unless expressly stated or limited otherwise, the first feature may comprise directly contacting the first and second features above or below the second feature, or may comprise contacting the first and second features not directly but through additional features therebetween. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature being below, beneath or beneath a second feature includes the first feature being directly below and obliquely below the second feature or simply indicating that the first feature is at a lesser level than the second feature.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the ampere force demonstration apparatus of the present invention mainly includes a bracket 11, a force sensor 12, a current conducting wire 13, an electromagnet group 14, a first power supply 15, a first current detecting device 16, a second power supply 17, a second current detecting device 18, and a slide rheostat 19; the bracket 11 is a supporting main body; the force sensor 12 is arranged above the bracket 11 and is used for accurately measuring the magnitude of ampere force applied to the electrified lead 13 in a magnetic field; the electrified conducting wire 13 is suspended below the force sensor 12, and because the electrified conducting wire 13 has certain mass, certain reading can be obtained on the force sensor 12, and the reading can be cleared through the zero clearing function of the force sensor 12, the gravity borne by the reading can be ignored; the electromagnet group 14 is arranged below the force sensor 12, and the electrified conducting wire 13 is vertically arranged in a uniform magnetic field generated by the electromagnet group 14; the first power supply 15 is a variable power supply, and is connected in series with the first current detection device 16 and the electromagnet group 14, and the magnitude of the magnetic induction intensity of the magnetic field generated by the electromagnet group 14 is changed by changing the magnitude of the output voltage of the first power supply 15, and the first current detection device 16 is used for measuring the magnitude of the current in the electromagnet group 14 in real time; the second power supply 17, the second current detecting device 18, the sliding rheostat 19 and the live wire 13 are connected in series, the second power supply 17 supplies direct current to the live wire 13, the second current detecting device 18 is used for measuring the current in the live wire 13 in real time, and the sliding rheostat 19 is used for changing the resistance value of the sliding rheostat to change the current in the live wire 13.

Referring to fig. 1, in this embodiment, a wooden support is adopted as the support 11, two layers of support plates are arranged above and below the wooden support, the two support plates are horizontally arranged and parallel, the force sensor 12 is horizontally arranged on the upper support plate, the electromagnet group 14 is horizontally arranged on the lower support plate, and the electrifying wire 13 is suspended below the force sensor 12 and vertically arranged in a uniform magnetic field in the electromagnet group 14. In the present embodiment, the current-carrying conductor 13 is a rectangular coil, and one bottom side of the rectangular coil is all vertically disposed in the electromagnet group 14, and is suspended below the force sensor 12 by a thin wire.

Referring to fig. 1, in the present embodiment, the electromagnet group 14 includes two electromagnets, and the two electromagnets are horizontally arranged in parallel, so as to simulate a uniform magnetic field. In this embodiment, the length of the electromagnet is 20CM, the width thereof is 5CM, the height thereof is 6CM, and the electromagnet comprises a housing 141 and a magnetic core 142, wherein the housing 141 is formed by two plastic sheets which are symmetrically arranged, and the magnetic core 142 is arranged between the two plastic sheets and is respectively connected in series with the first power supply 15 and the first current detection device 16; the magnetic core 142 is formed by sequentially arranging and overlapping a plurality of silicon steel sheets, and copper enameled wires are wound on the silicon steel sheets. In this embodiment, an enameled copper wire having a diameter of 1MM is wound on the silicon steel sheet for 200 turns. In the experimental process, the two electromagnets are horizontally arranged in parallel, and the magnetic field formed between the two electromagnets can be regarded as a uniform magnetic field within an error allowable range. The magnitude of the magnetic induction can also be measured by a special wire drawing meter.

Referring to fig. 1, in this embodiment, the first power supply 15 is a voltage-adjustable transformer, the output voltage of the voltage-adjustable transformer is 0 to 300V, the voltage of the voltage-adjustable transformer can be adjusted arbitrarily according to requirements, because the voltage-adjustable transformer outputs alternating current and the electromagnet group 14 uses direct current, a rectifier 151 is further disposed at the rear end of the first power supply 15, and the rectifier 151 converts the alternating current into direct current to power the electromagnet group 14. The first current detection device 16 and the second current detection device 18 may adopt an ammeter or a multimeter, and in the present embodiment, the first current detection device 16 and the second current detection device 18 adopt an ammeter. In the present embodiment, the second power supply 17 is a student power supply.

Referring to fig. 2, fig. 2 is a schematic diagram showing a relationship between an ampere force applied to the electrified lead 13 in a uniform magnetic field simulated by the electromagnet group 14 and a length of the electrified lead 13, and by changing the length of the electrified lead 13 while a current in the electrified lead 13 and the uniform magnetic field generated by the electromagnet group 14 are not changed, the ampere force applied to the electrified lead 13 can be observed in real time by the force sensor 12, and as can be seen from fig. 2, the length of the electrified lead 13 is in direct proportion to the ampere force applied to the electrified lead in the uniform magnetic field.

Referring to fig. 3, fig. 3 is a schematic diagram showing a relationship between an ampere force received by the electrified lead 13 in a uniform magnetic field simulated by the electromagnet group 14 and a current in the electrified lead 13, the magnitude of the current in the electrified lead 13 is changed by adjusting the resistance value of the sliding rheostat 19, and meanwhile, the length of the electrified lead 13 and the uniform magnetic field generated by the electromagnet group 14 are unchanged, so that the ampere force received by the electrified lead 13 can be observed in real time from the force sensor 12, and as can be seen from fig. 3, the magnitude of the current in the electrified lead 13 is in direct proportion to the ampere force received by the electrified lead 13 in the uniform magnetic field.

It should be noted that, the utility model discloses an ampere force presentation device is through changing the length of circular telegram wire 13, the even strong magnetic field that current size in circular telegram wire 13 and electro-magnet group 14 produced is unchangeable, through observing the numerical value change of force transducer 12 in real time, can see that the length of circular telegram wire 13 is directly proportional with the ampere force that receives in its even strong magnetic field; the current in the electrified lead 13 is changed by changing the resistance value of the slide rheostat 19, meanwhile, the length of the electrified lead 13 and the uniform magnetic field generated by the electromagnet group 14 are not changed, and the direct proportion relation between the current of the electrified lead 13 and the ampere force in the uniform magnetic field can be seen by observing the numerical value change of the force sensor 12 in real time; by changing the voltage of the first power supply 15, the size of the uniform magnetic field generated by the electromagnet group 14 is changed, meanwhile, the length of the electrified conducting wire 13 and the current size in the electrified conducting wire are not changed, and by observing the numerical value change of the force sensor 12 in real time, the direct proportion relationship between the size of the uniform magnetic field generated by the electromagnet group 14 and the ampere force applied to the electrified conducting wire 13 in the uniform magnetic field can be seen.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

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 concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An ampere force demonstration device is characterized by comprising a bracket, a support body and a spring, wherein the bracket is a support body; a force sensor disposed above the support; an energized conductor suspended below the force sensor; the electromagnet group is arranged below the force sensor, and the electrified conducting wire is vertically arranged in a uniform magnetic field generated by the electromagnet group; the first power supply and the first current detection device are connected with the electromagnet group in series, and the first power supply is a variable power supply; a second power source, a second current sensing device and a sliding rheostat connected in series with the energized conductor.

2. The ampere-force demonstration device according to claim 1, wherein the support is a wooden support, two layers of support plates are arranged above and below the wooden support, the two support plates are horizontally arranged and parallel, the force sensor is horizontally arranged on the upper support plate, and the electromagnet group is horizontally arranged on the lower support plate.

3. An ampere-force demonstration device according to claim 2 wherein the current carrying conductor is a rectangular coil having its base sides all disposed vertically in the electromagnet array and suspended below the force sensor by a thin wire.

4. An ampere-force demonstration device according to claim 1 wherein the electromagnet assembly comprises two electromagnets, the two electromagnets being arranged horizontally in parallel.

5. An ampere-force demonstration device according to claim 4, wherein the electromagnet comprises a housing and a magnetic core, the housing is formed by two plastic sheets which are symmetrically arranged, and the magnetic core is arranged between the two plastic sheets and is respectively connected with the first power supply and the first current detection device in series.

6. An ampere force demonstration device according to claim 5, wherein the magnetic core is formed by sequentially stacking a plurality of silicon steel sheets, and the silicon steel sheets are wound with enameled wires made of copper.

7. An ampere-force demonstration device according to claim 1 wherein the first power supply comprises a variable voltage transformer.

8. An ampere-force demonstration device according to claim 7 wherein a rectifier is provided at the rear end of the first power source.

9. An Ampere force demonstration apparatus according to any one of claims 1 to 8 wherein the first current detection means and the second current detection means are current meters or multimeters.

10. An ampere-force demonstration apparatus as claimed in any one of claims 1 to 8, wherein the second power supply is a student power supply.