Teaching aid for demonstrating amplification principle of triode

Abstract

The utility model discloses a triode amplification principle demonstration teaching aid, which comprises a water storage tank, a Y-shaped pipe and a water collection tank, the water storage tank is connected with the water collection tank through a return pipe and a return pipe valve, a right pipeline at the upper end of the Y-shaped pipe is communicated with the water storage tank, a lower pipeline at the upper end of the Y-shaped pipe is communicated with the water collection tank, and a magnetic suction valve is arranged in a left pipeline at the upper end of the Y-shaped pipe. A non-linear valve is arranged at the joint of the interiors of a left pipeline and a right pipeline at the upper end of the Y-shaped pipe, one end of the non-linear valve is in shaft connection with a U-shaped interconnecting rod, a spring is arranged at the other end of the U-shaped interconnecting rod, and the other end of the spring is fixedly connected with the weak magnetic blocks. Based on the similarity between water flow pressure and current voltage, the utility model provides a transistor amplification principle demonstration teaching aid which uses a circuit to simulate a circuit, and can display an abstract triode amplification circuit principle to students through the transistor amplification principle demonstration teaching aid, thereby playing a good teaching demonstration effect and improving classroom teaching efficiency.

Description

Technical Field

[0001] The utility model relates to the field of electronic teaching aids, in particular to a triode amplification principle demonstration teaching aid. Background Art

[0002] The transistor amplifier circuit is an important part of electronics teaching. The traditional teaching method is to show students the working process of the transistor through books and animation principles. This is relatively abstract and not easy for students to understand the working process of the transistor amplifier circuit. Therefore, teaching experiments are needed to help students understand and learn the principles of the transistor amplifier circuit. In teaching, teachers can only explain the working process through relatively abstract theoretical content and examples, which cannot achieve a good teaching demonstration effect and is not conducive to improving classroom teaching efficiency.

[0003] At present, there is no teaching aid on the market that demonstrates the principle of transistor amplification. Since the human eye cannot directly observe the flow of current in the circuit, students can only understand its working principle through imagination. Therefore, it takes a long time to help students establish the cognition of the principle of transistor amplification in the process of explaining to students. For this reason, based on the similar concepts of current voltage and water flow and water pressure, a teaching aid for demonstrating the principle of transistor amplification is proposed, which uses water circuits to simulate circuits, to help students understand the principle of transistor amplification. Summary of the invention

[0004] The utility model aims at the above problems and provides a teaching aid for demonstrating the principle of transistor amplification, which solves the problems that there is no teaching aid for demonstrating the principle of crystal transistor amplification on the market and students have difficulty in understanding the principle of transistor amplification.

[0005] The technical solution adopted by the utility model is: a triode amplification principle demonstration teaching aid, comprising a water storage tank, a Y-shaped tube and a water collection tank;

[0006] The water storage tank includes a main water storage tank and an auxiliary water storage tank. A reflux pipe is respectively provided between the main water storage tank and the auxiliary water storage tank and the water collecting tank. The two reflux pipes are both provided with reflux pipe valves near the water storage tanks.

[0007] The left pipe at the upper end of the Y-shaped tube is connected to the auxiliary water storage tank, the right pipe at the upper end of the Y-shaped tube is connected to the main water storage tank, and the pipe at the lower end of the Y-shaped tube is connected to the water collection tank;

[0008] A magnetic suction valve is provided inside the left pipe at the upper end of the Y-shaped tube, and a pair of weak magnetic suction blocks are provided at both ends of the side of the magnetic suction valve away from the left pipe of the Y-shaped tube, one pole of the weak magnetic suction block is fixedly connected to the left pipe of the Y-shaped tube, and the other pole is fixedly connected to the magnetic suction valve;

[0009] A nonlinear valve is provided at the intersection of the left pipe and the right pipe at the upper end of the Y-shaped pipe, and the nonlinear valve is connected to the inner wall of the right pipe of the Y-shaped pipe through a shaft;

[0010] One end of the nonlinear valve is axially connected to a U-shaped interconnecting rod, the other end of the U-shaped interconnecting rod is fixedly provided with a spring, and the other end of the spring is fixedly connected to a weak magnetic attraction block fixedly connected to the magnetic attraction valve.

[0011] Furthermore, the volume of the main water storage tank is greater than the volume of the auxiliary water storage tank.

[0012] Furthermore, the pipe diameter ratio of the left pipe at the upper end of the Y-shaped tube to the right pipe at the upper end of the Y-shaped tube is 1:3.

[0013] Furthermore, a linear switch is provided at one end of the left pipe at the upper end of the Y-shaped tube.

[0014] Furthermore, the magnetic valve is connected to the pipeline wall axis on the left side of the Y-shaped tube.

[0015] Furthermore, a limit clamp is provided in the middle of the nonlinear valve, the movable end of the limit clamp is fixedly connected to the nonlinear valve, and the fixed end of the limit clamp is fixedly connected to the right side pipeline wall of the upper end of the Y-shaped tube, and the limit clamp is used to limit the rotation angle of the nonlinear valve around the axis.

[0016] Advantages of the utility model:

[0017] Based on the similarity between water flow and water pressure and current and voltage, the utility model proposes a transistor amplification principle demonstration teaching aid which uses a water path to simulate a circuit. The cut-off region, amplification region and saturation region of a crystal triode are simulated by a nonlinear control valve with a weak magnetic attraction. The abstract triode amplification circuit principle can be presented to students through the utility model for students to learn, which has a good teaching demonstration effect and improves classroom teaching efficiency.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model when the linear switch is not turned on;

[0021] Figure 2 It is a schematic diagram of the structure of A of the utility model;

[0022] Figure 3 This is a schematic diagram of the overall structure of the utility model when the linear switch is turned on;

[0023] Figure 4 It is a schematic diagram of the structure of B of the utility model;

[0024] Figure 5 It is a schematic diagram of the connection relationship between the nonlinear valve and the U-shaped interconnecting rod of the utility model;

[0025] Figure 6 It is a schematic diagram of the working process of the limit snap ring of the utility model (the left figure is a schematic diagram of the limit snap ring in the open state, and the right figure is a schematic diagram of the limit snap ring in the closed state).

[0026] Reference numerals:

[0027] 1- water storage tank, 2- Y-type pipe, 3- water collection tank, 4- reflux pipe, 5- magnetic valve, 6- non-linear valve;

[0028] 11-main water storage tank, 12-auxiliary water storage tank, 21-linear switch, 41-return pipe valve, 51-weak magnetic suction block, 61-limiting clamp ring, 71-U-type interconnecting rod, 72-spring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] refer to Figures 1 to 6 , a teaching aid for demonstrating the principle of triode amplification, comprising a water storage tank 1, a Y-shaped tube 2 and a water collecting tank 3;

[0032] refer to Figure 3 The water storage tank 1 includes a main water storage tank 11 and an auxiliary water storage tank 12. A reflux pipe 4 is respectively provided between the main water storage tank 11 and the auxiliary water storage tank 12 and the water collecting tank 3. The two reflux pipes 4 are both provided with a reflux pipe valve 41 near the water storage tank 1.

[0033] The left pipe at the upper end of the Y-shaped tube 2 is connected to the auxiliary water storage tank 12, the right pipe at the upper end of the Y-shaped tube 2 is connected to the main water storage tank 11, and the pipe at the lower end of the Y-shaped tube 2 is connected to the water collection tank 3;

[0034] refer to Figure 2 A magnetic suction valve 5 is provided inside the left pipe at the upper end of the Y-shaped tube 2. A pair of weak magnetic suction blocks 51 are provided at both ends of the side of the magnetic suction valve 5 away from the left pipe of the Y-shaped tube 2. One pole of the weak magnetic suction block 51 is fixedly connected to the left pipe of the Y-shaped tube 2, and the other pole is fixedly connected to the magnetic suction valve 5.

[0035] A nonlinear valve 6 is provided at the intersection of the left pipe and the right pipe at the upper end of the Y-shaped tube 2, and the nonlinear valve 6 is connected to the inner wall of the right pipe of the Y-shaped tube 2 through an axis;

[0036] One end of the nonlinear valve 6 is axially connected to a U-shaped interconnecting rod 71 , the other end of the U-shaped interconnecting rod 71 is fixedly provided with a spring 72 , and the other end of the spring 72 is fixedly connected to a weak magnetic attraction block 51 fixedly connected to the magnetic attraction valve 5 .

[0037] The volume of the main water storage tank 11 is greater than that of the auxiliary water storage tank 12 .

[0038] The pipe diameter ratio of the left pipe at the upper end of the Y-shaped pipe 2 to the right pipe at the upper end of the Y-shaped pipe 2 is 1:3.

[0039] A linear switch 21 is provided at one end of the left pipe at the upper end of the Y-shaped tube 2 .

[0040] refer to Figure 2 The magnetic valve 5 is connected to the left side pipeline wall axis of the Y-shaped tube 2.

[0041] refer to Figure 2 , Figure 4 and Figure 6 A limit clamp 61 is provided in the middle of the nonlinear valve 6, the movable end of the limit clamp 61 is fixedly connected to the nonlinear valve 6, and the fixed end of the limit clamp 61 is fixedly connected to the right side pipeline wall of the upper end of the Y-shaped tube 2. The limit clamp 61 is used to limit the rotation angle of the nonlinear valve 6 around the axis.

[0042] In the embodiment of the utility model, the specific use and working process of the triode amplification principle demonstration teaching aid are as follows:

[0043] Close the return pipe valves 41 on the two return pipes 4, and add an appropriate amount of colored water into the water storage tank 1 at the upper end of the teaching aid;

[0044] The linear switch 21 located at the left pipe at the upper end of the Y-shaped tube 2 is turned on, and the water in the auxiliary water storage tank 12 flows into the left pipe at the upper end of the Y-shaped tube 2. Due to the effect of water pressure, the impact force of water pressure on the magnetic valve 5 gradually becomes greater than the magnetic force between the weak magnetic blocks 51, and the magnetic valve 5 is pushed open by the water flow. When the magnetic valve 5 is not pushed open, the state of the entire device simulates the cut-off region of the triode;

[0045] When the magnetic valve 5 is pushed open by the water flow, the spring 72 is hard, so the spring 72 pushes the U-shaped interconnection rod 71 without compression, and the U-shaped interconnection rod 71 pushes the nonlinear valve 6 to rotate clockwise, and the rotation angle is between 0-90°;

[0046] When the opening and closing angle of the nonlinear valve 6 gradually increases, the flow rate of the water in the main water storage tank 11 flowing downward into the water collection tank 3 also increases linearly. This process simulates the amplification area of ​​the triode;

[0047] Increasing the opening amplitude of the linear switch 21 causes the water flow in the left tube of the Y-shaped tube 2 to continue to increase, and the opening and closing angle of the magnetic valve 5 to continue to increase. Due to the existence of the limit clamp 61, the nonlinear valve 6 can only rotate 90° clockwise around the middle axis. When the opening and closing angle of the nonlinear valve 6 is the largest (i.e., 90°), the magnetic valve 5 can only compress the spring 72. At this time, the flow rate of the main water tank 11 flowing into the water collection tank 3 has reached the maximum value. This process simulates the saturation area of ​​the triode;

[0048] When the teaching aid demonstration is finished, the return pipe valve 41 on the return pipe 4 is opened, and the entire teaching aid is turned upside down, so that the water flowing into the water collecting tank 3 can flow back to the water storage tank 1 through the return pipe 4, and the demonstration can be repeated.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A teaching aid for demonstrating the principle of triode amplification, characterized in that: It comprises a water storage tank (1), a Y-shaped pipe (2) and a water collecting tank (3); The water storage tank (1) comprises a main water storage tank (11) and a secondary water storage tank (12), and a return pipe (4) is respectively provided between the main water storage tank (11) and the secondary water storage tank (12) and the water collecting tank (3), and the two return pipes (4) are both provided with a return pipe valve (41) near the water storage tank (1); The left pipe at the upper end of the Y-shaped tube (2) is connected to the auxiliary water storage tank (12), the right pipe at the upper end of the Y-shaped tube (2) is connected to the main water storage tank (11), and the lower pipe at the Y-shaped tube (2) is connected to the water collection tank (3); A magnetic suction valve (5) is provided inside the left pipeline at the upper end of the Y-shaped tube (2); a pair of weak magnetic suction blocks (51) are provided at both ends of the side of the magnetic suction valve (5) away from the side connected to the left pipeline of the Y-shaped tube (2); one pole of the weak magnetic suction block (51) is fixedly connected to the left pipeline of the Y-shaped tube (2), and the other pole is fixedly connected to the magnetic suction valve (5); A nonlinear valve (6) is provided at the intersection of the left pipe and the right pipe at the upper end of the Y-shaped tube (2), and the nonlinear valve (6) is connected to the inner wall of the right pipe of the Y-shaped tube (2) via a shaft; One end of the nonlinear valve (6) is axially connected to a U-shaped interconnecting rod (71), the other end of the U-shaped interconnecting rod (71) is fixedly provided with a spring (72), and the other end of the spring (72) is fixedly connected to a weak magnetic attraction block (51) fixedly connected to the magnetic attraction valve (5).

2. The triode amplification principle demonstration teaching aid according to claim 1, characterized in that: The volume of the main water storage tank (11) is greater than the volume of the auxiliary water storage tank (12).

3. The triode amplification principle demonstration teaching aid according to claim 1, characterized in that: The pipe diameter ratio between the left pipe at the upper end of the Y-shaped pipe (2) and the right pipe at the upper end of the Y-shaped pipe (2) is 1:

3.

4. The triode amplification principle demonstration teaching aid according to claim 1, characterized in that: A linear switch (21) is provided at one end of the left pipe at the upper end of the Y-shaped tube (2).

5. The triode amplification principle demonstration teaching aid according to claim 1, characterized in that: The magnetic valve (5) is axially connected to the left side pipe wall of the Y-shaped tube (2).

6. The triode amplification principle demonstration teaching aid according to claim 1, characterized in that: A limiting clamp ring (61) is provided in the middle of the nonlinear valve (6); a movable end of the limiting clamp ring (61) is fixedly connected to the nonlinear valve (6); a fixed end of the limiting clamp ring (61) is fixedly connected to the right side pipeline wall of the upper end of the Y-shaped tube (2); and the limiting clamp ring (61) is used to limit the rotation angle of the nonlinear valve (6) around the axis.

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