A test bench for diagnosing I-V curve of light source

Abstract

This utility model discloses a test stand for I-V curve diagnosis with adjustable light source, relating to the field of I-V curve diagnostic testing technology. It includes a main unit, a first cover plate, a second cover plate, a control panel, and a second adjustment block. A dimming mechanism is provided above the main unit, comprising a lamp disk, an adjustment bolt, a limiting flap, and an orientation groove. The orientation groove is located on the side of the main unit, the limiting flap is located on the side of the lamp disk, the adjustment bolt is located on the side of the limiting flap, and the limiting flap is installed in the orientation groove. The test stand is equipped with a dimming mechanism including a lamp disk, an adjustment bolt, a plum blossom-shaped limiting flap, and an orientation groove. Twisting the adjustment bolt causes the limiting flap to rotate within the orientation groove, achieving precise adjustment of the lamp disk angle and stable positioning, avoiding vibration and deviation. Three different types of light source beads are evenly distributed on the side of the lamp disk, allowing for switching of light source types without disassembly to adapt to different sample testing needs.

Description

Technical Field

[0001] This utility model relates to the field of IV curve diagnostic testing technology, specifically to a test stand for IV curve diagnosis with adjustable light source. Background Technology

[0002] The V-curve diagnostic test bench, also known as the current-voltage curve diagnostic test platform, is a professional equipment system that generates IV characteristic curves by accurately measuring the current response under voltage excitation. Based on the curve shape and parameters, it analyzes the performance of devices / systems and locates faults. Its core value is to transform the electrical characteristics of devices into a visualized "curve language", thereby achieving quantitative evaluation of performance and accurate diagnosis of faults. An IV curve tester with application number CN202322659670.1 is described. The device, through its overall structural design, allows for sealed placement of the tester body in dusty environments, effectively reducing the impact of wind and dust on the tester body. The fastening assembly makes the tester portable and does not require handheld use. It relies solely on an external light source (such as a sunlight simulator) and has no built-in adjustable light source, making it unable to independently complete IV tests with controllable light intensity and type. Based on this, this solution proposes "a test stand for IV curve diagnosis with adjustable light source" to address the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a test stand for IV curve diagnosis with adjustable light source, so as to solve the problem mentioned in the background art that existing equipment on the market only relies on external light source and cannot independently complete IV tests with controllable light intensity / type.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a test stand for IV curve diagnosis with adjustable light source, comprising a main unit, a first cover plate, a second cover plate, a control panel, and a second adjustment block; A dimming mechanism is installed on the top of the main unit. The dimming mechanism includes a lamp panel, an adjustment bolt, a limiting flap, and a directional groove. The directional groove is located on the side of the main unit, the limiting flap is located on the side of the lamp panel, the adjustment bolt is located on the side of the limiting flap, and the limiting flap is installed in the directional groove.

[0005] As a preferred technical solution of this utility model, a second cover plate is hinged to the top of the main unit, and a handle is vertically fixed to the upper surface of the second cover plate. A limiting hole is opened on the bottom surface of the second cover plate, and two limiting holes are symmetrically distributed. A first cover plate is hinged to the side of the main unit. A wiring board is fixedly connected to the inner wall of the first cover plate, and a display screen is fixedly connected to the outer side of the first cover plate. A control panel is configured on the side of the display screen. The control panel includes control buttons and control knobs. A pair of limiting bolts are fixedly connected to the side of the first cover plate. The first cover plate is engaged with the second cover plate through the limiting bolts and the limiting hole. Using the above technical solution, a handle is vertically fixed to the second cover plate hinged to the top of the main unit. The second cover plate can be quickly opened and closed via the handle, facilitating the inspection or adjustment of components such as the lamp panel inside the main unit. A wiring board is fixed to the inner wall of the first cover plate hinged to the side of the main unit. Flipping the first cover plate allows for convenient operation of the wiring board to plug and unplug test leads without disassembling the cover plate. At the same time, a display screen is fixed to the outside of the first cover plate, and a control panel with control buttons and control knobs is provided. This allows for intuitive display of IV curve test data and quick adjustment of equipment parameters without relying on external equipment, simplifying the operation process. In addition, the limiting bolts on the side of the first cover plate engage with two symmetrical limiting holes on the bottom of the second cover plate, which can tightly lock the positions of the two covers plate, preventing the covers from loosening during equipment use. It also encloses core components such as the wiring board and lamp panel inside the main unit, preventing dust and external force damage and extending the service life of the components.

[0006] As a preferred technical solution of this utility model, a focusing cover is fixedly connected to the inner wall of the main unit, and a lamp plate is movably connected below the focusing cover. Three replaceable lamp beads are evenly fixed on the side of the lamp plate, and a limiting petal is fixedly connected to the shaft end of the side of the lamp plate. The limiting petal has a plum blossom structure, and an adjusting bolt is fixedly connected to the shaft end of the limiting petal. An directional groove is opened on the side of the main unit, and the main unit is engaged with the lamp plate through the directional groove and the limiting petal. Using the above technical solution, the focusing cover fixed to the inner wall of the main unit can concentrate the light emitted by the movable lamp plate below and guide it to the test sample, reducing light scattering, ensuring uniform and stable illumination on the sample surface, avoiding fluctuations in current and voltage data due to differences in light intensity, and ensuring accurate test results. Three replaceable lamp beads are evenly fixed on the side of the lamp plate. With the help of the plum blossom structure limiting petals fixed to the shaft end of the lamp plate side, the adjusting bolt at the shaft end of the limiting petals, and the directional groove on the side of the main unit, turning the adjusting bolt can drive the limiting petals to rotate in the directional groove, realizing the adjustment of the lamp plate angle and the switching of the light source type. There is no need to disassemble the lamp plate or replace the light source module. It can meet the IV curve testing requirements of test samples of different materials and specifications, reduce the equipment operating cost, and the plum blossom structure limiting petals can provide stable limiting to prevent the lamp plate from shifting due to vibration, ensuring that the light source is always aligned with the sample test area.

[0007] As a preferred technical solution of this utility model, a limiting sleeve is fixedly connected to the side of the main unit, a guide rod is fixedly connected above the limiting sleeve, a first spring is fitted on the outside of the guide rod, a limiting strip is slidably connected inside the limiting sleeve, a lamp plate is rotatably connected above the limiting strip, and the limiting strip is fitted on the top of the guide rod. Using the above technical solution, a limiting strip is slidably connected inside a limiting sleeve fixed on the side of the main unit. The limiting strip is fitted onto a guide rod above the limiting sleeve, and a lamp disk is rotatably connected above the limiting strip. When adjusting the height of the lamp disk, the guide rod can restrict the limiting strip to move only in the vertical direction, preventing the lamp disk from shifting and causing the light source illumination position to deviate from the sample, thus ensuring the relative position stability between the light source and the sample. The first spring fitted on the outside of the guide rod has an elastic buffering effect, which can slow down the movement speed of the limiting strip and prevent the lamp disk from "rising and falling" and causing sudden changes in light source intensity, thus avoiding affecting the acquisition of IV curve data. At the same time, the elastic force of the first spring can balance the weight of the lamp disk, so that the lamp disk remains stable at any height position without the need for additional locking components. This allows for flexible adjustment of the distance between the light source and the sample according to the sample thickness, adapting to the testing needs of samples of different sizes.

[0008] As a preferred technical solution of this utility model, a guide rail is fixedly connected to the bottom surface of the main unit, a second adjusting block is slidably connected to the side of the guide rail, a guide groove is opened on the side of the second adjusting block, the center line of the second adjusting block is a tube sleeve structure, and a second spring is fixedly connected inside the tube sleeve of the guide groove. The top of the second spring is fixedly connected to the first adjusting block, a piston rod is fixedly connected to the bottom center line of the first adjusting block, a guide strip is fixedly connected to the side of the first adjusting block, the guide strip is slidably connected in the guide groove, and four connecting rods are rotatably connected between the second adjusting block and the first adjusting block, and a clamping plate is clamped between the connecting rods. Four rubber friction pads are evenly fixed on the inner wall of the clamping plate. Using the above technical solution, the guide rail fixed to the bottom of the main unit allows the second adjusting block, which is slidably connected to the side, to move left and right. A second spring is fixed inside the sleeve at the center position of the second adjusting block. The top of the second spring is fixed to the first adjusting block with a piston rod at the bottom. The guide strip on the side of the first adjusting block is slidably connected to the guide groove of the second adjusting block. Four connecting rods rotatably connected between the second and first adjusting blocks clamp a clamping plate. The elastic force of the second spring can be transmitted to the connecting rods through the first adjusting block, causing the clamping plate to automatically clamp the sample without the need for manual tightening of bolts. This method is highly efficient and can accommodate samples of different widths. At the same time, the friction pads uniformly fixed on the inner wall of the clamping plate can increase the friction with the sample, prevent the sample from sliding during the test, ensure the stability of the sample position, and avoid affecting the accuracy of IV curve data acquisition due to sample displacement.

[0009] Compared with the prior art, the beneficial effects of this utility model are: In terms of light source adjustment and control, the test stand is equipped with a dimming mechanism including a lamp plate, an adjustment bolt, a plum blossom-shaped limiting petal, and an orientation groove. Turning the adjustment bolt will cause the limiting petal to rotate in the orientation groove, achieving precise adjustment of the lamp plate angle and stable positioning, avoiding vibration and deviation. Three different types of light source beads are evenly distributed on the side of the lamp plate, allowing switching of light source types without disassembly to adapt to different sample testing needs. The condenser on the inner wall of the main unit can concentrate light and reduce scattering, ensuring uniform illumination on the sample surface, avoiding fluctuations in IV curve data caused by differences in light intensity, and improving testing accuracy. At the same time, in conjunction with the height adjustment structure of the limiting sleeve, guide rod, and first spring, the guide rod can restrict the lamp plate to move only vertically, and the first spring can buffer the adjustment speed and balance the weight of the lamp plate, allowing the lamp plate to stay stably at any height, adapting to the light source distance requirements of samples with different thicknesses. Regarding sample fixation, the test bench uses a linkage fixing structure consisting of a guide rail on the bottom of the main unit, a second adjusting block, a second spring, a first adjusting block, a connecting rod, and a clamping plate. The elastic force of the second spring can be transmitted to the connecting rod through the first adjusting block, causing the clamping plate to automatically clamp the sample without manual locking, and it can accommodate samples of different widths. The friction pads on the inner wall of the clamping plate can also increase friction, prevent the sample from sliding during testing, ensure the stability of the sample position, and avoid displacement that could affect data acquisition. In terms of operation and component protection, the top of the main unit is hinged to a second cover with a handle, and the side is hinged to a first cover integrating a junction box, display screen and control panel. The handle facilitates quick opening and closing of the cover for inspection of internal components, the junction box allows direct operation of test lead plugging and unplugging, and the display screen and control panel can intuitively display test data and quickly adjust parameters without relying on external equipment. At the same time, the first cover engages with the second cover through a limit bolt and a limit hole, which can cover the core components after closing to prevent dust contamination or external impact and extend the service life of the equipment. Attached Figure Description

[0010] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the focusing cover and guide rail structure of this utility model; Figure 3 This is a side view of the cross-sectional structure of this utility model; Figure 4 This is a schematic diagram of the lamp panel and limiting strip structure of this utility model; Figure 5 This is a schematic diagram of the main unit and the focusing cover structure of this utility model; Figure 6 This is a schematic diagram of the adjusting bolt and limiting valve structure of this utility model; Figure 7 This is a schematic diagram of the guide bar and the second spring structure of this utility model; Figure 8 This utility model Figure 5Enlarged structural diagram at point A in the middle.

[0011] In the diagram: 1. Main unit; 2. First cover plate; 3. Second cover plate; 4. Control panel; 5. Display screen; 6. Handle; 7. Limiting hole; 8. Focusing cover; 9. Guide rail; 10. Wiring board; 11. Limiting bolt; 12. Lamp panel; 13. Limiting sleeve; 14. Limiting strip; 15. First spring; 16. Guide rod; 17. Clamping plate; 18. Connecting rod; 19. First adjusting block; 20. Adjusting bolt; 21. Limiting flap; 22. Guide groove; 23. Guide strip; 24. Second spring; 25. Orientation groove; 26. Second adjusting block. Detailed Implementation

[0012] 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.

[0013] Please see Figure 1-8 The technical solution of this utility model includes: a main unit 1, a first cover plate 2, a second cover plate 3, a control panel 4, a display screen 5, a handle 6, a limiting hole 7, a focusing cover 8, a guide rail 9, a wiring board 10, a limiting bolt 11, a lamp plate 12, a limiting sleeve 13, a limiting strip 14, a first spring 15, a guide rod 16, a clamping plate 17, a connecting rod 18, a first adjusting block 19, an adjusting bolt 20, a limiting flap 21, a guide groove 22, a guide strip 23, a second spring 24, a directional groove 25, and a second adjusting block 26; A dimming mechanism is provided on the top of the main unit 1. The dimming mechanism includes a lamp panel 12, an adjustment bolt 20, a limiting petal 21, and a directional groove 25. The directional groove 25 is located on the side of the main unit 1, the limiting petal 21 is located on the side of the lamp panel 12, the adjustment bolt 20 is located on the side of the limiting petal 21, and the limiting petal 21 is installed in the directional groove 25. A second cover plate 3 is hinged to the top of the main unit 1. A handle 6 is vertically fixed to the upper surface of the second cover plate 3. Two limiting holes 7 are symmetrically distributed on the bottom surface of the second cover plate 3. A first cover plate 2 is hinged to the side of the main unit 1. A wiring board 10 is fixedly connected to the inner wall of the first cover plate 2. A display screen 5 is fixedly connected to the outer side of the first cover plate 2. A control panel 4 is configured on the side of the display screen 5. The control panel 4 includes control buttons and control knobs. A pair of limiting bolts 11 are fixedly connected to the side of the first cover plate 2. The first cover plate 2 is engaged with the second cover plate 3 through the limiting bolts 11 and the limiting holes 7. A handle 6 is vertically fixed to the second cover plate 3 hinged to the top of the main unit 1. The second cover plate 3 can be quickly opened and closed through the handle 6, which facilitates the inspection or adjustment of components such as the lamp panel 12 inside the main unit 1. The first cover plate 2, hinged to the side of the main unit 1, has a wiring board 10 fixed to its inner wall. By flipping the first cover plate 2, the wiring board 10 can be easily operated to plug and unplug test leads without disassembling the cover plate. At the same time, the display screen 5 is fixed to the outside of the first cover plate 2 and a control panel 4 with control buttons and control knobs is configured. It can intuitively display IV curve test data and quickly adjust equipment parameters without relying on external equipment, simplifying the operation process. In addition, the limiting bolt 11 on the side of the first cover plate 2 is engaged with the two symmetrical limiting holes 7 on the bottom surface of the second cover plate 3, which can tightly lock the position of the two covers, prevent the covers from loosening during equipment use, and also enclose the core components such as the wiring board 10 and the lamp panel 12 inside the main unit 1 to prevent dust and external force damage and extend the service life of the components. A condenser hood 8 is fixedly connected to the inner wall of the main unit 1. A lamp disk 12 is movably connected below the condenser hood 8. Three replaceable LEDs are evenly fixed to the side of the lamp disk 12, and the LEDs use a traditional threaded lamp holder structure. A limiting flap 21 is fixedly connected to the shaft end of the side of the lamp disk 12. The limiting flap 21 has a quincunx structure, and an adjusting bolt 20 is fixedly connected to the shaft end of the limiting flap 21. A directional groove 25 is opened on the side of the main unit 1. The main unit 1 is engaged with the lamp disk 12 through the directional groove 25 and the limiting flap 21. The condenser hood 8 fixed to the inner wall of the main unit 1 can concentrate and guide the light emitted from the movably connected lamp disk 12 to the test sample, reducing light scattering and ensuring uniform and stable illumination on the sample surface, avoiding current and electrical current fluctuations caused by differences in light intensity. To minimize data fluctuations and ensure accurate test results, three replaceable LED beads are evenly fixed on the side of the lamp panel 12. These, along with the plum blossom-shaped limiting petals 21 fixed to the shaft end of the lamp panel 12, the adjusting bolt 20 at the shaft end of the limiting petals 21, and the directional groove 25 on the side of the main unit 1, allow the limiting petals 21 to rotate within the directional groove 25 by turning the adjusting bolt 20. This enables the lamp panel 12 to be adjusted in angle and the light source type to be switched without disassembling the lamp panel 12 or replacing the light source module. This meets the IV curve testing requirements for samples of different materials and specifications, reducing equipment operating costs. Furthermore, the plum blossom-shaped limiting petals 21 provide stable positioning, preventing the lamp panel 12 from shifting due to vibration and ensuring that the light source is always aligned with the sample testing area. A limiting sleeve 13 is fixedly connected to the side of the main unit 1. A guide rod 16 is fixedly connected above the limiting sleeve 13. A first spring 15 is fitted on the outside of the guide rod 16. A limiting strip 14 is slidably connected inside the limiting sleeve 13. A lamp disk 12 is rotatably connected above the limiting strip 14. The limiting strip 14 is fitted above the guide rod 16. The limiting strip 14 is slidably connected inside the limiting sleeve 13 fixed to the side of the main unit 1. The limiting strip 14 is fitted on the guide rod 16 above the limiting sleeve 13, and the lamp disk 12 is rotatably connected above the limiting strip 14. When adjusting the height of the lamp disk 12, the guide rod 16 can restrict the limiting strip 14 to move only in the vertical direction. The guide rod 16 is designed to prevent the lamp plate 12 from shifting and causing the light source to deviate from the sample, thus ensuring the relative position of the light source and the sample is stable. The first spring 15 fitted on the outside of the guide rod 16 has an elastic buffering effect, which can slow down the movement speed of the limit bar 14 and prevent the lamp plate 12 from "rising and falling" and causing sudden changes in the light source intensity, thus avoiding affecting the acquisition of IV curve data. At the same time, the elastic force of the first spring 15 can balance the weight of the lamp plate 12, so that the lamp plate 12 remains stable at any height position without the need for additional locking parts. This allows for flexible adjustment of the distance between the light source and the sample according to the sample thickness, adapting to the testing needs of samples of different sizes. A guide rail 9 is fixedly connected to the bottom of the main unit 1. A second adjusting block 26 is slidably connected to the side of the guide rail 9. A guide groove 22 is formed on the side of the second adjusting block 26. The center line of the second adjusting block 26 is a sleeve structure, and a second spring 24 is fixedly connected inside the sleeve of the guide groove 22. The top of the second spring 24 is fixedly connected to a first adjusting block 19. A piston rod is fixedly connected to the center line of the bottom of the first adjusting block 19. A guide strip 23 is fixedly connected to the side of the first adjusting block 19 and slidably connected within the guide groove 22. Four connecting rods 18 are rotatably connected between the second adjusting block 26 and the first adjusting block 19, and a clamping plate 17 is clamped between the connecting rods 18. Four rubber friction pads are evenly fixed to the inner wall of the clamping plate 17. The guide rail 9 fixed to the bottom of the main unit 1 allows the second adjusting block 26, which is slidably connected to the side, to move left and right. A second spring 24 is fixed inside the sleeve at the center position of the second adjusting block 26. The top of the second spring 24 is fixed to the first adjusting block 19 with a piston rod at the bottom. The guide strip 23 on the side of the first adjusting block 19 is slidably connected in the guide groove 22 of the second adjusting block 26. Four connecting rods 18 rotatably connected between the second adjusting block 26 and the first adjusting block 19 clamp the clamping plate 17. The elastic force of the second spring 24 can be transmitted to the connecting rods 18 through the first adjusting block 19, which drives the clamping plate 17 to automatically clamp the sample without the need to manually tighten the bolts. The operation is efficient and can adapt to samples of different widths. At the same time, the friction pads uniformly fixed on the inner wall of the clamping plate 17 can increase the friction with the sample, prevent the sample from sliding during the test, ensure the stability of the sample position, and avoid the accuracy of IV curve data acquisition due to sample displacement.

[0014] Working principle: When using an IV curve diagnostic test stand with adjustable light source, the operator flips open the second cover plate 3 on the top of the main unit 1 by using the handle 6 on the second cover plate 3. Then, the operator releases the engagement between the side limit bolt 11 of the first cover plate 2 and the bottom limit hole 7 of the second cover plate 3, flips open the first cover plate 2, and exposes the internal test area and wiring board 10. Then, the sample to be tested is placed in the test area on the bottom of the main unit 1. The spacing is initially adjusted by sliding the second adjustment block 26 using the guide rail 9. The second spring 24 inside the sleeve of the second adjustment block 26 pushes the first adjustment block 19 to move upward. Through the limit of the guide bar 23 and the guide groove 22, the four connecting rods 18 are driven to link the clamping plate 17. The rubber friction pad on the inner wall of the clamping plate 17 firmly clamps the sample to prevent slippage during the test. According to the sample testing requirements, the adjusting bolt 20 on the side shaft end of the lamp plate 12 is turned, which drives the plum blossom structure limiting petal 21 to rotate in the orientation groove 25 on the side of the main unit 1. This not only achieves precise adjustment of the angle of the lamp plate 12 to align with the sample, but also allows switching between three different types of light source beads on the side of the lamp plate 12. Different samples can be adapted without disassembling the lamp plate 12. If the height of the light source needs to be adjusted, the lamp plate 12 is pressed so that the limiting strip 14 slides vertically along the limiting sleeve 13 and the guide rod 16. The first spring 15 provides buffering and balances the weight of the lamp plate 12, ensuring that the lamp plate 12 stays stably at the target height. At the same time, the light-concentrating cover 8 on the inner wall of the main unit 1 concentrates the light and guides it to the sample, reducing scattering to ensure uniform illumination and providing a stable light source environment for data acquisition. The operator connects the external test leads to the terminal block 10 on the inner wall of the first cover plate 2 to construct a test circuit. The equipment is started and test parameters such as voltage range and sampling frequency are set through the control panel 4 on the outer side of the first cover plate 2, which includes control buttons and knobs. The display screen 5 shows the parameter settings in real time. After the equipment is running, the light source continuously illuminates the sample. The test circuit collects current data under different voltages to form an IV curve. The data is transmitted to the display screen 5 in real time for intuitive viewing. If it is necessary to fine-tune parameters such as the brightness of the light source, it can be adjusted in real time through the control panel 4. The adjustment effect is synchronously fed back to the display screen 5 to ensure the accuracy of the test data. Turn off the device via control panel 4, disconnect the test circuit on terminal block 10, pull the clamping plate 17 outward to move the connecting rod 18 and the first adjusting block 19 downward to compress the second spring 24, release the sample fixation and take out the sample; finally flip and close the first cover plate 2 and the second cover plate 3, so that the limiting bolt 11 of the first cover plate 2 is inserted into the limiting hole 7 of the second cover plate 3, and the core components such as terminal block 10 and lamp plate 12 are wrapped in the host 1 to prevent dust contamination and external force collision, thus completing the device reset and component protection.

[0015] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test stand for IV curve diagnosis with adjustable light source, comprising a main unit (1); characterized in that: A dimming mechanism is provided above the main unit (1). The dimming mechanism includes a lamp panel (12), an adjustment bolt (20), a limiting flap (21), and a directional groove (25). The directional groove (25) is located on the side of the main unit (1), the limiting flap (21) is located on the side of the lamp panel (12), the adjustment bolt (20) is located on the side of the limiting flap (21), and the limiting flap (21) is installed in the directional groove (25).

2. The IV curve diagnostic test stand with adjustable light source according to claim 1, characterized in that, The main unit (1) is hinged to the top of the second cover plate (3). The upper surface of the second cover plate (3) is vertically fixed to the handle (6). The bottom surface of the second cover plate (3) is provided with a limiting hole (7). There are two limiting holes (7) symmetrically distributed. The main unit (1) is hinged to the side of the first cover plate (2). The inner wall of the first cover plate (2) is fixedly connected to the wiring board (10). The outer side of the first cover plate (2) is fixedly connected to the display screen (5). The side of the display screen (5) is equipped with a control panel (4). The control panel (4) includes control buttons and control knobs. The side of the first cover plate (2) is fixedly connected to a pair of limiting bolts (11). The first cover plate (2) is engaged with the second cover plate (3) through the limiting bolts (11) and the limiting hole (7).

3. The IV curve diagnostic test stand with adjustable light source according to claim 2, characterized in that, The main unit (1) is fixedly connected to the inner wall of the light hood (8), and the light hood (8) is movably connected to the lamp plate (12) below. Three replaceable lamp beads are evenly fixed on the side of the lamp plate (12). The side shaft end of the lamp plate (12) is fixedly connected to the limiting petal (21). The limiting petal (21) has a plum blossom structure, and the shaft end of the limiting petal (21) is fixedly connected to the adjusting bolt (20). The main unit (1) has an orientation groove (25) on its side. The main unit (1) is engaged with the lamp plate (12) through the orientation groove (25) and the limiting petal (21).

4. The IV curve diagnostic test stand with adjustable light source according to claim 3, characterized in that, The main unit (1) is fixedly connected to the side of the limiting sleeve (13), and the guide rod (16) is fixedly connected above the limiting sleeve (13). The first spring (15) is fitted on the outside of the guide rod (16). The limiting strip (14) is slidably connected inside the limiting sleeve (13). The lamp plate (12) is rotatably connected above the limiting strip (14). The limiting strip (14) is fitted on the guide rod (16).

5. The IV curve diagnostic test stand with adjustable light source according to claim 4, characterized in that, The bottom surface of the main unit (1) is fixedly connected to the guide rail (9), the side of the guide rail (9) is slidably connected to the second adjusting block (26), the side of the second adjusting block (26) is opened with the guide groove (22), the center position of the second adjusting block (26) is a tube sleeve structure, and the tube sleeve of the guide groove (22) is fixedly connected to the second spring (24), the top of the second spring (24) is fixedly connected to the first adjusting block (19), the bottom center position of the first adjusting block (19) is fixedly connected to the piston rod, the side of the first adjusting block (19) is fixedly connected to the guide strip (23), the guide strip (23) is slidably connected in the guide groove (22), and there are four connecting rods (18) rotatably connected between the second adjusting block (26) and the first adjusting block (19), and a clamping plate (17) is clamped between the connecting rods (18), and four rubber friction plates are evenly fixed on the inner wall of the clamping plate (17).

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