Electromagnetic induction comprehensive demonstration instrument

Abstract

The utility model discloses an electromagnetic induction comprehensive demonstration appearance relates to electromagnetic induction teaching aid technical field including magnetic block and many turns coil, and magnetic block inserts inside many turns coil, still includes vertical board, transparent pipeline, indicator plate and moving groove, and vertical board horizontal swing joint is in moving groove inside, and vertical board is fixed with first emitting diode, second emitting diode, and is set up with coil through -hole, and coil through -hole is connected with many turns coil, and transparent pipeline inserts many turns coil, and magnetic block sliding connection is in transparent pipeline, and many turns coil passes through coil through -hole and first emitting diode and second emitting diode electricity connection forms the inductive circuit of circulation, through the different installation position of many turns coil and transparent pipeline, and cooperate the setting of gyro wheel, realize the detection of electric current and the direct manifestation of force, improved the integrity of device, through the setting of display board, emitting diode and sensitive galvanometer and transparent pipeline, abstract concept carries out dynamic presentation to the physical process directly.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic induction teaching aids technology, and more specifically, to an electromagnetic induction integrated demonstration device. Background Technology

[0002] Lenz's law is a difficult point in the chapter on electromagnetic induction. The concept of electromagnetic induction experiments is abstract and not easy to understand. Traditional teaching methods tend to lead to rote memorization by students. Therefore, it is necessary to use visualization experiments to transform the abstract "change in magnetic flux" into an observable phenomenon, thereby breaking through the teaching focus of "the relationship between the magnitude of induced electromotive force and the rate of change of magnetic flux".

[0003] While existing demonstration devices can display core concepts of electromagnetic induction such as Faraday's law of electromagnetic induction, Lenz's law, and electromagnetic damping, they can only perform single experiments, require numerous teaching aids, and are inconvenient to move; the experimental demonstrations are not intuitive enough, resulting in poor teaching demonstration effectiveness. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides an electromagnetic induction integrated demonstration instrument, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: an electromagnetic induction integrated demonstration instrument, including a magnetic block, an indicator plate and a multi-turn coil, wherein the magnetic block is inserted into the multi-turn coil, characterized in that: it also includes a vertical plate, a transparent pipe and a movable groove;

[0006] The upright plate is horizontally and movably connected inside the movable slot; the upright plate is fixed with a first light-emitting diode and a second light-emitting diode, and has a coil through hole, through which a multi-turn coil is connected; the front side of the movable slot has two pairs of positioning screw holes, which are located directly below the coil through hole and outside the indicator plate, close to the multi-turn coil, respectively; the lower end of the upright plate is detachably connected to any pair of positioning screw holes by mounting bolts; the upper end of the upright plate is threaded with a connecting bolt, and the protruding end of the connecting bolt is threaded with a transparent pipe; the magnetic block is slidably connected to the transparent pipe; the transparent pipe is inserted into the multi-turn coil; the setting of the light-emitting diodes visually indicates the direction of the current, and the movement of the upright plate when the magnetic block moves visually indicates the "resistance" effect in the electromagnetic induction phenomenon, so as to conduct an electromagnetic induction experiment.

[0007] The multi-turn coil passes through the coil hole and is electrically connected to the first and second light-emitting diodes to form a loop induction circuit. The first and second light-emitting diodes are connected in parallel and have opposite polarities. A fuse resistor is connected in the induction circuit to prevent the light-emitting diodes from burning out.

[0008] As a further preferred embodiment of this utility model, a circuit diagram is drawn on the front side of the indicator plate, wiring is connected on the back side of the indicator plate, and there are four coil holes arranged in a rectangular array on the sensing circuit. The coil holes at the diagonal positions are directly connected to the sensing circuit, which facilitates the adjustment of the vertical and horizontal connection of the multi-turn coil and the replacement of coils with different numbers of turns, and all of them are connected to the sensing circuit.

[0009] As a further preferred embodiment of this utility model, a transparent fixing block is fixed to the outer side of the transparent pipe. The fixing block is rectangular and located on the side of the transparent pipe away from the multi-turn coil. The fixing block includes a limiting baffle, a block frame, rolling copper pillars, a through hole, and a fixing copper pillar. The through hole is opened in the center of the block frame and is fitted and fixed to the transparent pipe. A limiting baffle with a break in the middle is fixed on the side of the block frame away from the multi-turn coil. The transparent pipe passes through the limiting baffle. There are two fixing copper pillars, fixed inside the block frame and located on both sides of the transparent pipe. There are two rolling copper pillars, movably connected inside the block frame, located on both sides of the transparent pipe, and movably connected to the fixing copper pillars. By setting the fixing block, the two moving copper pillars inside can be observed to move closer and further apart, and an "increase, decrease, and expand" experiment can be performed.

[0010] As a further preferred embodiment of this utility model, a sensitive galvanometer is connected to the induction circuit between the fuse resistor and the multi-turn coil. A switch is connected in series below the sensitive galvanometer at the induction circuit to further confirm the generation and direction of the current. The switch is used to prevent damage to electrical components. At the same time, the circuit at the sensitive galvanometer can be disconnected to connect to the left terminal for external connection, thereby enabling digital display. The conditions for the generation of induced current are determined by the on / off state of the switch.

[0011] As a further preferred embodiment of this utility model, two rollers are installed at the bottom of the upright plate, and the rollers roll in the moving groove; two limiting bolts are threadedly connected to the front of the moving groove, and the limiting bolts abut against the outer side of the corresponding roller to restrict the movement of the indicator plate.

[0012] As a further preferred embodiment of this invention, an extension rod is fixed to one side of the magnetic block. The extension rod is a slender rod, which facilitates the movement of the magnetic block.

[0013] As a further preferred embodiment of this utility model, the indicator plate is fixed with a left terminal and a right terminal that penetrate the indicator plate. The right terminal is located above and below the sensing circuit where the second light-emitting diode is located, and the left terminal is located above and below the sensing circuit where the sensitive galvanometer and the switch are connected in series. The front and rear sides of the left and right terminals protrude from the indicator plate. The arrangement of the terminals facilitates the connection of external sensors for the digital display of current and voltage data.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. By using different installation positions of multi-turn coils and transparent pipes, and in conjunction with the setting of rollers, current detection and force visualization can be achieved. By setting fixed slots on the transparent pipes, expansion and contraction experiments can be carried out to enable various experiments, improve the overall integrity of the device, and facilitate overall transportation.

[0016] 2. By using display boards, LEDs, sensitive galvanometers, and transparent pipes, abstract concepts are presented dynamically, and physical processes are made more intuitive, improving teaching effectiveness and helping students build a complete knowledge network of "magnetism generating electricity - electricity generating magnetism - energy conversion". Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this disclosure, some embodiments of this disclosure will be described below.

[0018] The accompanying drawings used will be briefly introduced. Obviously, the drawings described below are only some of the drawings of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the electromagnetic induction integrated demonstration instrument of this utility model.

[0020] Figure 2 This is a three-dimensional view of the electromagnetic induction integrated demonstration device of this utility model from another perspective.

[0021] Figure 3 This is a schematic diagram of another mounting position of the central plate in the electromagnetic induction integrated demonstration instrument of this utility model.

[0022] Figure 4 This is a rear view of the electromagnetic induction integrated demonstration device of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the fixed slot block in the electromagnetic induction integrated demonstration instrument of this utility model, after removing the limiting baffle.

[0024] The attached diagram is labeled as follows: 1. Extension rod; 2. Magnetic block; 3. Connecting bolt; 4. Fixing slot block; 5. Vertical plate; 6. Positioning bolt; 7. Transparent pipe; 8. Multi-turn coil; 9. Indicator plate; 10. Coil hole; 11. Sensitive galvanometer; 12. First LED; 13. Second LED; 14. Right side terminal; 15. Roller; 16. Limiting bolt; 17. Moving slot; 18. Fuse resistor; 19. Positioning screw hole; 20. Switch; 21. Left side terminal; 401. Limiting baffle; 402. Slot block frame; 403. Rolling copper column; 404. Through hole; 405. Fixing copper column. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] See Figure 1 , Figure 2 and Figure 4As shown, an electromagnetic induction integrated demonstration device includes a magnetic block 2, an indicator plate 9, and a multi-turn coil 8. The magnetic block 2 is inserted into the multi-turn coil 8. It also includes a vertical plate 5, a transparent pipe 7, and a movable groove 17. The vertical plate 5 is horizontally movably connected to the movable groove 17. Two rollers 15 are installed at the bottom of the vertical plate 5, and the rollers 15 roll in the movable groove 17. Two limiting bolts 16 are threadedly connected to the front of the movable groove 17. The limiting bolts 16 abut against the outer side of the corresponding roller, thereby limiting the movement of the indicator plate 9. A first light-emitting diode 12 and a second light-emitting diode 13 are fixed on the vertical plate 5, and a coil through-hole 10 is provided, through which the multi-turn coil 8 is connected. The moving slot 17 has two pairs of positioning screw holes 19 on its front side. The positioning screw holes 19 are located directly below the coil through hole 10 and outside the indicator plate 9, close to the multi-turn coil 8. The lower end of the upright plate 5 is detachably connected to any pair of positioning screw holes 19 by mounting bolts. The upper end of the upright plate 5 is threaded with a connecting bolt 3. The protruding end of the connecting bolt 3 is threaded with a transparent pipe 7. The magnetic block 2 is slidably connected to the transparent pipe 7. The transparent pipe 7 is inserted into the multi-turn coil 8. The direction of current is intuitively shown by the setting of light-emitting diodes. An extension rod 1 is threadedly fixed on one side of the magnetic block 2. The extension rod 1 is a slender rod, which facilitates the movement of the magnetic block 2 and allows for the replacement of magnetic blocks 2 with different magnetic forces. The multi-turn coil 8 passes through the coil hole 10 and is electrically connected to the first light-emitting diode 12 and the second light-emitting diode 13 to form a loop induction circuit. The first light-emitting diode 12 and the second light-emitting diode 13 are connected in parallel and have opposite polarities. A fuse resistor 18 is connected in the induction circuit. A sensitive galvanometer 11 is connected at the induction circuit between the fuse resistor 18 and the multi-turn coil 8. A switch 20 is connected in series below the sensitive galvanometer at the induction circuit. The switch is a push-button switch to further confirm the generation and direction of the current. The switch 20 is designed to prevent damage to electrical components. It can also be used to disconnect the circuit at the sensitive galvanometer and connect it to the left terminal for external connection, thereby enabling digital display. Furthermore, the switch setting can be used to conduct circuit opening and closing experiments to determine the conditions for the generation of induced current.

[0027] like Figure 1 and 2 As shown, in this practical work process, the upright plate 5 is installed in the positioning screw hole 19 on the left side, the transparent pipe 7 is set horizontally, and the right end is inserted into the multi-turn coil 8. The limiting bolt 16 is rotated and unscrewed to release the restriction on the roller 15. The magnetic block 2 is inserted into the transparent pipe 7, and the left and right movement of the display plate is observed to carry out the "repulsion and attraction" experiment.

[0028] During the operation of this utility model, the generation and direction of current are confirmed by setting up diodes and sensitive galvanometer 11 to verify the magnetoelectric experiment.

[0029] like Figure 4 As shown in this embodiment of the utility model, a circuit diagram is drawn on the front side of the indicator plate 9, and the wiring is connected on the back side of the indicator plate 9. There are four coil through holes 10, which are arranged in a rectangular array on the sensing line. The coil through holes 10 at the diagonal position are directly connected to the sensing line, which facilitates changing the insertion position and adjusting the vertical and horizontal connection of the multi-turn coil 8, as well as facilitating the replacement of multi-turn coils with different numbers of turns. All of them are connected to the sensing line. The above arrangement facilitates the horizontal or vertical connection of the multi-turn coil 8 and ensures that it is connected inside the sensing line.

[0030] Furthermore, the connecting wires can be wires with conductive clamps at both ends, and the wires can be connected through the back side to avoid the wires affecting the observation effect.

[0031] like Figure 3 As shown, during the operation of this utility model, by releasing the positioning bolt 6, adjusting the position of the upright plate 5 to below the multi-turn coil 8, and rotating it to make the transparent pipe 7 stand upright, the multi-turn coil 8 is sleeved on the transparent pipe 7, and the head and tail ends of the multi-turn coil 8 are inserted into the coil through hole 10 to connect it to the induction circuit. By placing the magnetic block 2 and rotating the position of the demonstrator to expose the transparent pipe 7, it can be observed that the speed of the extension rod 1 slows down when the magnetic block 2 falls into the part, so as to demonstrate the "rejection and retention" experiment.

[0032] Furthermore, by replacing multi-turn coils with different numbers of turns or using multi-turn coils with variable numbers of turns and magnetic blocks with different magnetic forces, and releasing them from the same height, the changes in the swing amplitude of the galvanometer and the brightness of the LED under different magnetic flux and number of turns can be observed. Additionally, when releasing from different heights, while ensuring that the number of turns of the multi-turn coil and the magnetic force of the magnetic block are constant, the changes in the swing amplitude of the galvanometer and the brightness of the LED can be observed, thereby deriving the relationship between the magnitude of the induced electromotive force and the number of turns and the rate of change of magnetic flux.

[0033] like Figure 1-5 As shown in this embodiment of the present invention, a transparent fixing block 4 is fixed to the outer side of the transparent pipe 7. The fixing block 4 is rectangular and located on the side of the transparent pipe 7 away from the multi-turn coil 8. The fixing block 4 includes a limiting baffle 401, a block frame 402, a rolling copper column 403, a through hole 404, and a fixing copper column 405. The through hole 404 is provided in the center of the block frame 402. The through hole 404 is sleeved and fixed to the transparent pipe 7. The limiting baffle 401 with a break in the middle is fixed on the side of the block frame 402 away from the multi-turn coil 8. The transparent pipe 7 passes through the limiting baffle 401. There are two fixing copper columns 405, which are fixed inside the block frame 402 and located on both sides of the transparent pipe 7. There are two rolling copper columns 403, which are movably connected inside the block frame 402, located on both sides of the transparent pipe, and movably connected to the fixing copper columns 405.

[0034] like Figure 3 As shown in the working process of this utility model, by releasing the positioning bolt 6, adjusting the position of the upright plate 5 to below the multi-turn coil 8, and rotating it to make the transparent pipe 7 stand upright, and then connecting the multi-turn coil 8 to the transparent pipe 7, inserting the head and tail ends of the multi-turn coil 8 into the coil through hole 10 so that it is connected to the induction circuit, rotating the position of the demonstrator, exposing the fixed slot block 4, manually adjusting the rolling copper column 403 to the side away from the transparent pipe 7, and by moving the magnetic block 2 up and down, observing the two movable copper columns inside approaching and moving away, and conducting the "increase, decrease, and expand" experiment.

[0035] like Figure 1 As shown in this embodiment of the utility model, the indicator plate 9 is fixed with a left terminal 21 and a right terminal 14 that pass through the indicator plate 9. The right terminal 14 is located above and below the sensing circuit where the second light-emitting diode 13 is located. The left terminal 21 is located above and below the sensing circuit where the sensitive galvanometer 11 and the switch 20 are connected in series. The front and rear sides of the left terminal 21 and the right terminal 14 protrude from the indicator plate 9. The arrangement of the terminals facilitates the connection of external sensors to display current and voltage data. That is, a closed loop is one of the conditions for the generation of induced current.

[0036] In the operation of this utility model, a multi-range current sensor and a voltage sensor are connected through the left terminal 21 and the right terminal 14. The system is connected to the Suwell intelligent digital experimental panel and a computer with Suwell iLabV12_x654Setup installed. The current sensor is installed at the left terminal and, after the switch is turned off, it replaces the sensitive galvanometer and is connected in series with the sensing circuit. The voltage sensor is installed at the right terminal and is connected in parallel with the diode. The computer is used to visually observe the changes in current and voltage. The above structure is a common structure and is readily available, so it will not be described in detail here.

[0037] In the operation of this utility model, the Suwell intelligent digital experimental panel, a multi-range current sensor, a voltage sensor, and a computer with Suwell iLabV12_x654Setup installed are connected through the external terminals 21 and 14 to intuitively observe the changes in current and voltage. The above structure is a common structure and is readily available, so it will not be described in detail here.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electromagnetic induction integrated demonstration device, comprising a magnetic block, an indicator plate, and a multi-turn coil, wherein the magnetic block is inserted inside the multi-turn coil, characterized in that: It also includes vertical panels, transparent pipes, and moving troughs; The upright plate is horizontally and movably connected to the inside of the movable slot; the upright plate is fixed with a first light-emitting diode and a second light-emitting diode, and has a coil through hole, through which a multi-turn coil is connected; the front side of the movable slot has two pairs of positioning screw holes, which are located directly below the coil through hole and outside the indicator plate, close to the multi-turn coil, respectively; the lower end of the upright plate is detachably connected to any pair of positioning screw holes by mounting bolts; the upper end of the upright plate is threaded with a connecting bolt, and the protruding end of the connecting bolt is threaded with a transparent pipe; the magnetic block is slidably connected to the transparent pipe; the transparent pipe is inserted into the multi-turn coil; The multi-turn coil passes through the coil hole and is electrically connected to the first light-emitting diode and the second light-emitting diode to form a loop induction circuit. The first light-emitting diode and the second light-emitting diode are connected in parallel and have opposite polarities. A fuse resistor is connected in the induction circuit.

2. The electromagnetic induction integrated demonstration instrument according to claim 1, characterized in that: The circuit diagram is drawn on the front side of the indicator board, the wiring is connected on the back side of the indicator board, and there are four coil holes arranged in a rectangular array on the sensing circuit. The coil holes at the diagonal positions are directly connected to the sensing circuit.

3. The electromagnetic induction integrated demonstration instrument according to claim 1, characterized in that: A transparent fixing block is fixed to the outer side of the transparent pipe. The fixing block is rectangular and located on the side of the transparent pipe away from the multi-turn coil. The fixing block includes a limiting baffle, a block frame, rolling copper pillars, a through hole, and a fixing copper pillar. The through hole is opened in the center of the block frame and is fitted and fixed to the transparent pipe. A limiting baffle with a break in the middle is fixed on the side of the block frame away from the multi-turn coil. The transparent pipe passes through the limiting baffle. There are two fixing copper pillars, which are fixed inside the block frame and located on both sides of the transparent pipe. There are two rolling copper pillars, which are movably connected inside the block frame, located on both sides of the transparent pipe, and movably connected to the fixing copper pillars.

4. The electromagnetic induction integrated demonstration instrument according to claim 1, characterized in that: A sensitive galvanometer is connected at the induction line between the fuse resistor and the multi-turn coil, and a switch is connected in series at the induction line below the sensitive galvanometer.

5. The electromagnetic induction integrated demonstration instrument according to claim 1, characterized in that: Two rollers are installed at the bottom of the upright plate, and the rollers roll in the moving groove; two limiting bolts are threadedly connected to the front of the moving groove, and the limiting bolts abut against the outer side of the roller on the corresponding side.

6. The electromagnetic induction integrated demonstration device according to claim 1, characterized in that: An extension rod is fixed to one side of the magnetic block, and the extension rod is a slender rod.

7. The electromagnetic induction integrated demonstration device according to claim 4, characterized in that: The indicator plate is fixed with a left terminal and a right terminal that pass through the indicator plate. The right terminal is located above and below the sensing circuit where the second light-emitting diode is located, and the left terminal is located above and below the sensing circuit where the sensitive galvanometer and the switch are connected in series. The front and rear sides of the left and right terminals protrude from the indicator plate.

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