Ampere force demonstration instrument

Abstract

An amper force demonstration instrument, including base, the upper end middle part of base is equipped with pressure sensor, the upper end of pressure sensor is equipped with adjustable coil, the upper end of base is equipped with support rod in left and right opposite sides vertically, support rod is connected with crosspiece between, the middle part of crosspiece is vertically equipped with connecting rod, crosspiece and connecting rod rotate and cooperate, the upper end of connecting rod is equipped with limit rotation subassembly for limiting rotation angle, the middle part lower end of crosspiece is equipped with angle scale, be equipped with pointer on connecting rod, the lower end of connecting rod is connected with placing rack, the lower end of placing rack is equipped with the subassembly that can adjust magnetic induction intensity and keep magnetic field size distribution uniform. The utility model discloses through pressure sensor and adjustable coil cooperation, can directly measure amper force size, and can enhance magnetic induction intensity, and realized the multiple superposition of magnetic induction intensity, accurate adjustment magnetic induction intensity makes the magnetic force size distribution of magnetic field uniform, satisfies different experimental demand.

Description

Technical Field

[0001] This utility model relates to the field of teaching experiment technology, and in particular to an Ampere force demonstrator. Background Technology

[0002] As one of the three fundamental experiments in electromagnetism, the Ampere force experiment originated from a series of studies following Oersted's discovery of the magnetic effect of electric current in 1820. French physicist Ampère established a mathematical model (F=ILBsinθ) describing the force on a current element through precise quantitative experiments. This experiment transformed the abstract electromagnetic field theory into an observable mechanical phenomenon, leading to the determination of the Ampere force. The Ampere force is influenced by magnetic induction intensity, the magnitude of the conductor current, the effective length of the conductor, and the angle between the magnetic field direction and the current direction. Verification is achieved by controlling different variables. Many existing devices can demonstrate the Ampere force and are used as teaching aids. However, the control of variables in these devices is not rigorous. For example, changing the "number of magnets" leads to uneven magnetic field distribution, making it impossible to precisely control the magnetic induction intensity B. Furthermore, traditional horseshoe magnets have weak magnetic fields, and the conductors are greatly affected by gravity and friction, making it difficult to observe minute force changes. Utility Model Content

[0003] The purpose of this invention is to provide an Ampere force demonstrator that combines powerful magnets and electromagnets, increases the number of powerful magnets to enhance magnetic induction intensity, and adjusts the electromagnets to make the magnetic field distribution uniform, so that it has the effect of multiple controllable variables in the experiment.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: An Ampere force demonstrator includes a base, characterized in that: a pressure sensor is provided at the upper center of the base, an adjustable coil is provided on the pressure sensor, support rods are vertically provided on the left and right sides of the adjustable coil at the upper end of the base, a crossbar is connected between the support rods, a connecting rod is vertically provided at the middle of the crossbar, the crossbar and the connecting rod are rotatably engaged, the connecting rod rotates along its own axis, a rotation limiting component is provided at the upper end of the connecting rod for limiting the rotation angle of the connecting rod, an angle scale is provided at the lower middle end of the crossbar, and a pointer is provided on the connecting rod; The lower end of the connecting rod is connected to a placement frame. The lower end of the placement frame is provided with a first placement slot and a second placement slot on the left and right sides of the adjustable coil, respectively. A detachable first electromagnet is provided in the first placement slot, and a detachable second electromagnet is provided in the second placement slot. Multiple third placement slots are provided on the right side of the first placement slot, and multiple first strong magnets are detachably installed in each of the third placement slots. Multiple fourth placement slots are provided on the left side of the second placement slot, and multiple second strong magnets are detachably installed in each of the fourth placement slots. The first electromagnet, the second electromagnet, the first strong magnet, and the second strong magnet are used in conjunction with the adjustable coil.

[0005] By adopting the above technical solution, the first electromagnet, the second electromagnet, the first strong magnet, and the second strong magnet form a strong magnetic field, which, together with the adjustable magnet, generates an Ampere force. The pressure sensor, in conjunction with the adjustable coil, can measure the magnitude of the Ampere force. The angle scale and pointer can accurately perform variable experiments on the effective length of the conductor and the angle between the magnetic field direction and the current direction. The magnetic field can be adjusted using the first and second electromagnets, and the number of the first and second strong magnets on the left and right sides can be increased to change the magnetic induction intensity.

[0006] A further feature of this invention is that the base is provided with a first transformer and a second transformer, the first transformer is located on the upper left side of the base and is electrically connected to the first electromagnet, and the second transformer is located on the upper right side of the base and is electrically connected to the second electromagnet.

[0007] By adopting the above technical solution, the first transformer can adjust the magnetic force of the first electromagnet, and the second transformer can adjust the magnetic force of the second electromagnet, thereby making the total magnetic field distribution uniform.

[0008] A further feature of this invention is that a third transformer is provided on the upper rear side of the base, and the third transformer is electrically connected to the adjustable coil.

[0009] By adopting the above technical solution, the third transformer can adjust the current of the adjustable coil, thereby accurately changing the current of the conductor.

[0010] A further feature of this invention is that the adjustable coil includes multiple sets, and at least two sets, of energized coils with different numbers of turns. One side of the adjustable coil is provided with a first terminal and multiple second terminals. The number of second terminals corresponds to the number of each energized coil. The first terminals are all electrically connected to the negative terminal of each energized coil, and the second terminals are respectively electrically connected to the positive terminal of each energized coil.

[0011] By adopting the above technical solution, the effective length of the conductor can be accurately changed by electrically connecting energized coils with different numbers of turns.

[0012] A further configuration of this utility model is as follows: the rotation limiting component includes a disc, an inner ratchet, a slide cylinder, a pawl, and a spring. The disc is connected to the upper middle part of the crossbar. The disc is hollow inside. The upper end of the connecting rod is inserted into the disc. The connecting rod rotatably engages with the disc. The inner ratchet is fixedly disposed inside the disc. The slide cylinder is connected to the upper end of the connecting rod. The pawl is slidably disposed inside the slide cylinder. The spring is disposed inside the slide cylinder. One end of the spring is connected to the pawl, and the other end of the spring is connected to the connecting rod. The end of the pawl away from the spring engages with the inner ratchet.

[0013] By adopting the above technical solution, the cooperation of the inner ratchet and pawl causes the connecting rod to drive the placement frame to rotate at the same angle, so that the electromagnetic field and the energized coil form an angle change of equal multiple, which can accurately change the angle between the magnetic field direction and the current direction.

[0014] A further feature of this invention is that a display screen is provided on the front side of the base, and the pressure sensor, the first transformer, and the second transformer are all electrically connected to the display screen.

[0015] By adopting the above technical solution, the display screen provides feedback and adjusts the data on the magnitude of the current and magnetic field, and can also observe the magnitude of the Ampere force.

[0016] In summary, this utility model has the following beneficial effects: Firstly, this utility model can directly measure the magnitude of the Ampere force by using a pressure sensor in conjunction with an adjustable coil. The magnetic field can be adjusted by using a first electromagnet and a second electromagnet. The number of the first and second strong magnets on the left and right sides can be increased simultaneously to change the magnetic induction intensity and enhance the magnetic induction intensity. Furthermore, the magnetic induction intensity can be multiplied to meet different experimental needs.

[0017] Secondly, in terms of controlling the current magnitude, this utility model allows for the adjustment of the magnetic induction intensity of the first and second electromagnets through the first and second transformers, accurately controlling the magnetic field magnitude and solving the problem of uneven magnetic force distribution. The third transformer is used to adjust the current magnitude, facilitating the adjustment of the current magnitude in experiments and reducing errors.

[0018] Thirdly, this utility model uses an adjustable coil as a substitute. The adjustable coil has multiple sets of energized coils with different numbers of turns, and the number of turns connected can be selected according to the needs of the experiment, so as to accurately change the effective length of the wire.

[0019] Fourthly, this utility model uses a graduated disc to measure angles. The placement frame is rotated while the coil frame remains stationary. The placement frame is rotated at equal angles via the inner ratchet and pawl, which facilitates angle adjustment. Furthermore, the angle between the magnetic field and the coil is less susceptible to influence from other factors during the experiment, making it convenient to investigate the relationship between the Ampere force and the angle between the magnetic field direction and the current direction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a cross-sectional view of the inner ratchet in this utility model; In the diagram: 1. Base; 2. Pressure sensor; 3. Support rod; 4. Adjustable coil; 401. Energized coil; 402. First connector; 403. Second connector; 5. Crossbar; 501. Connecting rod; 6. Rotation limiting assembly; 601. Disc; 602. Inner ratchet; 603. Slide cylinder; 604. Pawl; 605. Spring; 7. Angle scale; 8. Pointer; 9. Placement rack; 901. First placement slot; 902. Second placement slot; 903. Third placement slot; 904. Fourth placement slot; 10. First electromagnet; 11. Second electromagnet; 12. First strong magnet; 1201. Second strong magnet; 13. First transformer; 1301. Second transformer; 1302. Third transformer; 14. Display screen. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Examples, such as Figure 1 and Figure 2 As shown, an Ampere force demonstrator includes a base 1. A pressure sensor 2 is provided at the upper middle part of the base 1 for detecting the magnitude of the Ampere force. An adjustable coil 4 is provided on the pressure sensor 2. The pressure sensor 2 cooperates with the adjustable coil 4, and the pressure sensor 2 can directly measure the magnitude of the Ampere force. Support rods 3 are vertically provided on the left and right sides of the adjustable coil 4 at the upper end of the base 1. A crossbar 5 is connected between the support rods 3. A connecting rod 501 is vertically provided in the middle of the crossbar 5. The connecting rod 501 rotates along its own axis. The crossbar 5 and the connecting rod 501 are rotatably engaged. A rotation limiting component 6 is provided at the upper end of the connecting rod 501 to limit the rotation angle of the connecting rod 501. An angle scale 7 is provided at the lower middle part of the crossbar 5. A pointer 8 is provided on the connecting rod 501. The pointer 8 follows the rotation of the connecting rod 501. The connecting rod 501 and the angle scale 7 are rotatably engaged. The angle scale 7 and the pointer 8 can accurately perform variable experiments on the effective length of the conductor and the angle between the magnetic field direction and the current direction. The lower end of the connecting rod 501 is connected to a placement frame 9. The lower end of the placement frame 9 has a first placement slot 901 and a second placement slot 902 on the left and right sides of the adjustable coil 4, respectively. A detachable first electromagnet 10 is installed in the first placement slot 901, and a detachable second electromagnet 11 is installed in the second placement slot 902. Multiple third placement slots 903 are located to the right of the first placement slot 901, and multiple first strong magnets 12 are detachably installed in each of the third placement slots 903. Multiple fourth placement slots 904 are located to the left of the second placement slots 902, and multiple second strong magnets 1201 are detachably installed in each of the fourth placement slots 904. The first electromagnet 10, second electromagnet 11, and first strong magnet 1201 are... The first electromagnet 12 and the second strong electromagnet 1201 are used in conjunction with the adjustable coil 4. The first electromagnet 10, the second electromagnet 11, the first strong electromagnet 12 and the second strong electromagnet 1201 form a strong magnetic field, which in turn forms an Ampere force with the adjustable magnet. The pressure sensor 2 works in conjunction with the adjustable coil 4. The pressure sensor 2 can directly measure the magnitude of the Ampere force. The angle scale 7 and the pointer 8 can accurately perform variable experiments on the effective length of the conductor and the angle between the magnetic field direction and the current direction. The magnetic field can be adjusted by using the first electromagnet 10 and the second electromagnet 11. The number of the first strong electromagnet 12 and the second strong electromagnet 1201 on the left and right sides can be increased to change the magnetic induction intensity and meet different experimental needs.

[0026] The base 1 is equipped with a first transformer 13 and a second transformer 1301. The first transformer 13 is located on the upper left side of the base 1 and is electrically connected to the first electromagnet 10. The second transformer 1301 is located on the upper right side of the base 1 and is electrically connected to the second electromagnet 11. The upper rear side of the base 1 is equipped with a third transformer 1302 and is electrically connected to the adjustable coil 4. The first transformer 13 can adjust the magnetic force of the first electromagnet 10, and the second transformer 1301 can adjust the magnetic force of the second electromagnet 11. By adjusting, the magnetic induction intensity of the total magnetic field is evenly distributed. The third transformer 1302 can adjust the current of the adjustable coil 4, so as to accurately change the current of the wire.

[0027] The adjustable coil 4 includes multiple sets, and at least two sets, of energized coils 401 with different numbers of turns. One side of the adjustable coil 4 is provided with a first terminal 402 and multiple second terminals 403. The number of second terminals 403 corresponds to the number of each energized coil 401. The first terminals 402 are all electrically connected to the negative terminal of each energized coil 401, and the second terminals 403 are respectively electrically connected to the positive terminal of each energized coil 401. By connecting energized coils 401 with different numbers of turns, the effective length of the conductor can be accurately changed. Connectors are provided at the 50-turn, 100-turn, and 150-turn terminals of the energized coils 401, allowing the selection of the number of turns to be connected according to experimental needs, thus achieving accurate adjustment of the effective length of the conductor.

[0028] like Figure 3 As shown, the rotation limiting assembly 6 includes a disc 601, an inner ratchet 602, a slide cylinder 603, a pawl 604, and a spring 605. The disc 601 is connected to the upper middle part of the crossbar 5. The disc 601 is hollow inside. The upper end of the connecting rod 501 is inserted into the disc 601, and the connecting rod 501 is rotatably engaged with the disc 601. The inner ratchet 602 is fixedly installed inside the disc 601. The slide cylinder 603 is connected to the upper end of the connecting rod 501, and the pawl 604 is slidably installed inside the slide cylinder 603. Spring 605 is located inside slide cylinder 603. One end of spring 605 is connected to pawl 604, and the other end of spring 605 is connected to connecting rod 501. The end of pawl 604 away from spring 605 is engaged with inner ratchet 602. The cooperation between inner ratchet 602 and pawl 604 causes connecting rod 501 to drive placement frame 9 to rotate at equal angles, so that the electromagnetic field and the current-carrying coil 401 form an angle change of equal multiple, which can accurately change the angle between the direction of the magnetic field and the direction of the current.

[0029] The front side of the base 1 is equipped with a display screen 14. The pressure sensor 2, the first transformer 13, and the second transformer 1301 are all electrically connected to the display screen 14. The display screen 14 provides feedback on the magnitude of the current and the magnitude of the magnetic field, and allows for adjustment. It also allows observation of the magnitude of the Ampere force. The display screen 14 is a sensitive current display that shows the magnitude of the current, which solves the problem of large adjustment error in the original experiment current.

[0030] Instructions for use: First, zero the display data of pressure sensor 2 on display screen 14. Then, adjust the voltage using the data from the first transformer 13 and the second transformer 1301 fed back from display screen 14 to adjust the magnitude of the magnetic field to meet experimental requirements. Investigate the relationship between Ampere force and the effective length of energized coil 401. Using the controlled variable method, maintain the angle between the magnetic field direction and the current direction. The third transformer 1302 keeps the current magnitude of energized coil 401 constant. Conduct experiments by connecting energized coils 401 with different numbers of turns. Investigate the relationship between the magnitude of Ampere force and the current flowing through the coil. Maintain the angle between the magnetic field direction and the current direction constant. Connect energized coils 401 with the same number of turns. Conduct experiments by changing the current magnitude of energized coil 401 using the third transformer 1302. Investigate the relationship between the magnitude of Ampere force and the current flowing through the coil. To investigate the relationship between the magnetic field and the magnetic field, while maintaining the angle between the magnetic field direction and the current direction, a current-carrying coil 401 with the same number of turns is connected to the ground. The third transformer 1302 keeps the current magnitude of the current-carrying coil 401 constant. A first strong magnet 12 and a second strong magnet 1201 are added to the left and right sides respectively. The current magnitude of the electromagnet is adjusted, and the Ampere force is recorded. Then, one or two more magnets are added to each side in turn, and the current magnitude of the electromagnet is finely adjusted. The Ampere force is recorded, and the experiment is compared. To investigate the effect of the angle θ between the coil current and the magnetic field direction on the Ampere force, the magnetic field magnitude is kept constant, and a current-carrying coil 401 with the same number of turns is connected to the ground. The third transformer 1302 keeps the current magnitude of the current-carrying coil 401 constant. By rotating the placement frame 9, the magnetic field direction and the current direction are made to form an angle. The rotation limiting component 6 makes it rotate at the same angle to facilitate the collection of experimental data.

[0031] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An Ampere force demonstrator, comprising a base (1), characterized in that: A pressure sensor (2) is provided at the middle of the upper end of the base (1). An adjustable coil (4) is provided on the pressure sensor (2). Support rods (3) are vertically provided on the left and right sides of the adjustable coil (4) at the upper end of the base (1). A crossbar (5) is connected between the support rods (3). A connecting rod (501) is vertically provided in the middle of the crossbar (5). The crossbar (5) and the connecting rod (501) are rotatably engaged. The connecting rod (501) rotates along its own axis. A rotation limiting component (6) is provided at the upper end of the connecting rod (501) to limit the rotation angle of the connecting rod (501). An angle scale (7) is provided at the lower end of the middle of the crossbar (5). A pointer (8) is provided on the connecting rod (501). The lower end of the connecting rod (501) is connected to a placement rack (9). The lower end of the placement rack (9) is provided with a first placement slot (901) and a second placement slot (902) on the left and right sides of the adjustable coil (4). A detachable first electromagnet (10) is provided in the first placement slot (901), and a detachable second electromagnet (11) is provided in the second placement slot (902). A plurality of third placement slots (903) are provided on the right side of the first placement slot (901). A plurality of first strong magnets (12) are detachably installed in the third placement slots (903). A plurality of fourth placement slots (904) are provided on the left side of the second placement slots (902). A plurality of second strong magnets (1201) are detachably installed in the fourth placement slots (904). The first electromagnet (10), the second electromagnet (11), the first strong magnet (12), and the second strong magnet (1201) are used in conjunction with the adjustable coil (4).

2. The Ampere force demonstrator according to claim 1, characterized in that: The base (1) is provided with a first transformer (13) and a second transformer (1301). The first transformer (13) is located on the upper left side of the base (1) and is electrically connected to the first electromagnet (10). The second transformer (1301) is located on the upper right side of the base (1) and is electrically connected to the second electromagnet (11).

3. The Ampere force demonstrator according to claim 2, characterized in that: A third transformer (1302) is provided on the upper rear side of the base (1), and the third transformer (1302) is electrically connected to the adjustable coil (4).

4. The Ampere force demonstrator according to claim 3, characterized in that: The adjustable coil (4) includes at least two sets of energized coils (401) with different numbers of turns. One side of the adjustable coil (4) is provided with a first terminal (402) and a plurality of second terminals (403). The number of second terminals (403) corresponds to the number of each energized coil (401). The first terminals (402) are all electrically connected to the negative terminal of each energized coil (401), and the second terminals (403) are respectively electrically connected to the positive terminal of each energized coil (401).

5. An Ampere force demonstrator according to claim 4, characterized in that: The rotation limiting component (6) includes a disc (601), an inner ratchet (602), a slide cylinder (603), a pawl (604), and a spring (605). The disc (601) is connected to the upper middle part of the crossbar (5). The disc (601) is hollow inside. The upper end of the connecting rod (501) is inserted into the disc (601). The connecting rod (501) and the disc (601) are rotatably engaged. The inner ratchet (602) is fixedly mounted on the disc (601). Inside the slide cylinder (603), the slide cylinder (603) is connected to the upper end of the connecting rod (501), the pawl (604) is slidably disposed inside the slide cylinder (603), the spring (605) is disposed inside the slide cylinder (603), one end of the spring (605) is connected to the pawl (604), the other end of the spring (605) is connected to the connecting rod (501), and the end of the pawl (604) away from the spring (605) engages with the inner ratchet (602).

6. The Ampere force demonstrator according to claim 5, characterized in that: The base (1) is provided with a display screen (14) on the front side, and the pressure sensor (2), the first transformer (13) and the second transformer (1301) are all electrically connected to the display screen (14).

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