Novel photoelectric effect demonstrator

Abstract

The utility model relates to the technical field of experiment demonstration instruments, in particular to a novel photoelectric effect demonstrator which comprises a back plate, the front face of the back plate is fixedly connected with a panel, one side of the front face of the back plate is provided with a long groove hole, the inner wall of the long groove hole is connected with a light source box in a clamped mode, and the rear end of the light source box is fixedly connected with a copper net. A zinc plate is fixedly connected to the rear end of the copper net, a square groove hole is formed in the other side of the front face of the back plate, a galvanometer is clamped to the inner wall of the square groove hole, a groove hole is formed in the side, close to the galvanometer, of the square groove hole, a transformer is clamped to the inner wall of the groove hole, and a galvanometer zeroing knob is fixedly connected to the side, away from the galvanometer, of the square groove hole. According to the structural design of the utility model, a vertical demonstration blackboard box type integrated structure is adopted, key maintenance parts are in a module plug type, the experiment operation is simple and safe, the face-to-face explanation to students is facilitated, and the high-performance sensitive galvanometer and the experiment schematic diagram are integrated on the panel.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental demonstration instruments, in particular to a novel photoelectric effect demonstrator. Background Art

[0002] The utility model relates to a photoelectric effect demonstrator for teaching. The photoelectric effect demonstrator is an important physical experimental instrument, which verifies Einstein's theory that light is a particle and is recognized by the physics community. Since then, the properties of light as a particle have been widely accepted, which in turn led to the formation of a consensus that light has a wave-particle duality.

[0003] Traditional photoelectric effect demonstrators have many deficiencies and shortcomings in teaching and use.

[0004] 1. Structurally, the horizontal or fully disassembled type is adopted, which is inconvenient for demonstration and teaching. It is not convenient to explain to students face to face. The fully disassembled type also requires complex external connections, especially high-voltage lines, and there are safety hazards.

[0005] 2. In terms of power supply, it is necessary to connect to 220V AC power and several dry batteries, which is very inconvenient. If left for a long time, the dry batteries will leak and corrode the instrument.

[0006] 3. The sensitivity of the electronic circuit is low, and the experimental results are often not very satisfactory. Utility Model Content

[0007] The purpose of the utility model is to provide a novel photoelectric effect demonstrator to solve the problems raised in the above background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A new type of photoelectric effect demonstrator, comprising

[0010] A back panel is fixedly connected to the front of the back panel, an elongated slot is provided on one side of the front of the back panel, a light source box is clamped on the inner wall of the elongated slot, a copper mesh is fixedly connected to the rear end of the light source box, a zinc plate is fixedly connected to the rear end of the copper mesh, a square slot is provided on the other side of the front of the back panel, an ammeter is clamped on the inner wall of the square slot, a slot is provided on the side close to the ammeter, a transformer is clamped on the inner wall of the slot, an ammeter zero adjustment knob is fixedly connected to the side away from the ammeter, an indicator light is fixedly connected to the side close to the ammeter zero adjustment button, and a power switch is fixedly connected to the side close to the indicator light.

[0011] Preferably, a right side bar is clamped on one side of the back panel, and a left side bar is fixedly connected on the other side of the back panel.

[0012] Preferably, an upper aluminum alloy profile is fixedly connected to the top end of the back plate, and a lower aluminum alloy profile is fixedly connected to the bottom end of the back plate.

[0013] Preferably, a left foot is fixedly connected to one side of the bottom end of the lower aluminum alloy profile, and a right foot is fixedly connected to the other side of the bottom end of the lower aluminum alloy profile.

[0014] Preferably, a circuit board is fixedly connected to the inner wall of the back plate, and a front side of the circuit board is fixedly connected to the zero adjustment knob of the ammeter.

[0015] Preferably, a socket slot is provided on one side close to the light source box, and a light source box socket is fixedly connected to the inner wall of the socket slot.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. This is a new type of photoelectric effect demonstrator. Its structural design adopts a vertical demonstration blackboard box-type integrated structure. The key maintenance components are modular plug-in types. The experimental operation is simple and safe, and it is also convenient to explain to students face to face. The high-performance sensitive ammeter and experimental schematic diagram are integrated on the panel.

[0018] 2. This new type of photoelectric effect demonstrator adopts 220V mains power supply design, does not need to be connected to dry batteries, and uses isolation transformer linear voltage regulation instead of battery power supply, which is convenient and simple to use.

[0019] 3. This is a new type of photoelectric effect demonstrator. In terms of electronic circuit design, it adopts a differential anti-interference multi-stage amplifier circuit to increase circuit sensitivity and reduce mains interference. It can output a high-sensitivity stable signal without battery power supply. The experimental effect can reach up to 200uA or more, which greatly improves the experimental effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the utility model;

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

[0022] Figure 3 It is a schematic diagram of the internal cross-section of the utility model;

[0023] Figure 4 It is a circuit principle block diagram of the utility model.

[0024] In the figure: 1, back plate; 2, panel; 3, light source box; 4, copper mesh; 5, zinc plate; 6, ammeter; 7, transformer; 8, ammeter zero adjustment knob; 9, indicator light; 10, power switch; 11, right side bar; 12, left side bar; 13, upper aluminum alloy profile; 14, lower aluminum alloy profile; 15, left foot; 16, right foot; 17, circuit board; 18, light source box socket; DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0027] A new type of photoelectric effect demonstrator, comprising

[0028] A back plate 1, a panel 2 is fixedly connected to the front of the back plate 1, a long slot is provided on one side of the front of the back plate 1, a light source box 3 is clamped on the inner wall of the square slot, a copper mesh 4 is fixedly connected to the rear end of the light source box 3, a zinc plate 5 is fixedly connected to the rear end of the copper mesh 4, a square slot is provided on the other side of the front of the back plate 1, an ammeter 6 is clamped on the inner wall of the square slot, a slot is provided on the side close to the ammeter 6, a transformer 7 is clamped on the inner wall of the slot, a zero adjustment knob 8 of the ammeter 6 is fixedly connected to the side away from the ammeter 6, an indicator light 9 is fixedly connected to the side close to the zero adjustment knob 8 of the ammeter, a power switch 10 is fixedly connected to the side close to the indicator light 9, and the power switch 10 is manually started to drive the transformer 7 to run, the transformer 7 uses AC220V, the transformer 7 is connected to the power supply indication transmission AC7.5V for rectification and linear voltage stabilization, and then transmitted through the transmission DC6V, differential multi-stage amplification is adopted to transmit to the ammeter 6, and at the same time to the zinc plate 5, and rectified and transmitted to the copper mesh 4 through DC high voltage;

[0029] In this embodiment, preferably, a right side bar 11 is clamped on one side of the back panel 1, and a left side bar 12 is fixedly connected on the other side of the back panel 1. The right side bar 11 is used to fix the right side of the back panel 1, and the left side bar 12 is used to fix the left side of the back panel 1, thereby achieving the function of protecting the back panel 1;

[0030] In this embodiment, preferably, the top of the back plate 1 is fixedly connected with an upper aluminum alloy profile 13, and the bottom of the back plate 1 is fixedly connected with a lower aluminum alloy profile 14. The top of the back plate 1 is fixed by the upper aluminum alloy profile 13, and the bottom of the back plate 1 is fixed by the lower aluminum alloy profile 14, so as to achieve a protective effect;

[0031] In this embodiment, preferably, a left foot 15 is fixedly connected to one side of the bottom end of the lower aluminum alloy profile 14, and a right foot 16 is fixedly connected to the other side of the bottom end of the lower aluminum alloy profile 14. The left foot 15 and the right foot 16 stabilize the structure, and prevent the device from sliding and deviating during use, thereby achieving the effect of stabilizing the structure;

[0032] In this embodiment, preferably, a circuit board 17 is fixedly connected to the inner wall of the back plate 1, and the front side of the circuit board 17 is fixedly connected to the ammeter zero adjustment knob 8. The specific implementation method of the circuit board 17 is as follows: Figure 4 As shown, the ammeter zeroing knob 8 is rotated to achieve the function of zeroing the ammeter 6;

[0033] In the present embodiment, preferably, a socket 18 slot is opened on one side close to the light source box 3, and a light source box socket 18 is fixedly connected to the inner wall of the socket 18 slot. Through the setting of the light source box socket 18, the light source box socket 18 is connected to an external power supply, thereby achieving the effect of transmitting current to the light source box 3.

[0034] A novel photoelectric effect demonstrator of this embodiment adopts a vertical demonstration blackboard box-type integrated structure in terms of structural design, and the key maintenance components are modular plug-in type. The experimental operation is simple and safe, and it is also convenient to explain to students face to face. The high-performance sensitive ammeter 6 and the experimental principle diagram are integrated on the panel 2, which is clear at a glance. In terms of power supply design, 220V mains power supply is adopted, and no dry battery is required. The isolation transformer 7 linear voltage regulator is used to replace the battery power supply, which is convenient and simple to use. In terms of electronic circuit design, a differential anti-interference multi-stage amplifier circuit is adopted to increase the circuit sensitivity and reduce the mains interference. A high-sensitivity stable signal can be output without battery power supply, and the experimental effect can reach more than 200uA. The experimental effect is greatly improved.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A new type of photoelectric effect demonstrator, characterized in that: include A back plate (1), wherein a panel (2) is fixedly connected to the front of the back plate (1), an elongated slot hole is provided on one side of the front of the back plate (1), a light source box (3) is clamped on the inner wall of the elongated slot hole, a copper mesh (4) is fixedly connected to the rear end of the light source box (3), a zinc plate (5) is fixedly connected to the rear end of the copper mesh (4), a square slot hole is provided on the other side of the front of the back plate (1), an ammeter (6) is clamped on the inner wall of the square slot hole, a slot hole is provided on the side close to the ammeter (6), a transformer (7) is clamped on the inner wall of the slot hole, an ammeter zero adjustment knob (8) is fixedly connected on the side away from the ammeter (6), an indicator light (9) is fixedly connected on the side close to the ammeter zero adjustment knob (8), and a power switch (10) is fixedly connected on the side close to the indicator light (9).

2. A novel photoelectric effect demonstrator according to claim 1, characterized in that: A right side bar (11) is clamped on one side of the back panel (1), and a left side bar (12) is fixedly connected on the other side of the back panel (1).

3. A novel photoelectric effect demonstrator according to claim 1, characterized in that: An upper aluminum alloy profile (13) is fixedly connected to the top end of the back plate (1), and a lower aluminum alloy profile (14) is fixedly connected to the bottom end of the back plate (1).

4. A novel photoelectric effect demonstrator according to claim 3, characterized in that: A left foot (15) is fixedly connected to one side of the bottom end of the lower aluminum alloy profile (14), and a right foot (16) is fixedly connected to the other side of the bottom end of the lower aluminum alloy profile (14).

5. A novel photoelectric effect demonstrator according to claim 1, characterized in that: A circuit board (17) is fixedly connected to the inner wall of the back plate (1), and a front side of the circuit board (17) is fixedly connected to an ammeter zero adjustment knob (8).

6. A novel photoelectric effect demonstrator according to claim 1, characterized in that: A socket (18) slot is provided on one side close to the light source box (3), and the light source box socket (18) is fixedly connected to the inner wall of the socket (18) slot.

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