Photovoltaic diode detection device

Abstract

The present invention discloses a photovoltaic diode detection device, which belongs to the field of diode technology. A photovoltaic diode detection device includes a device body, a feeding groove is provided at the upper end of the device body, and a rectangular slide groove is provided on the inner cavity surface of the device body, a fixing component is provided at one end of the rectangular slide groove, a photosensitive detection component is connected to the upper end of the fixing component, and an electric telescopic rod is provided below the fixing component, and a fixing block is driven by a first driving motor to move toward the direction of the photovoltaic diode until the fixing block contacts the outer surface of the photovoltaic diode, and the fixing block changes the resistance value of the resistor block during the movement, so that the light intensity of the lighting lamp becomes stronger and stronger, thereby simulating the sunlight intensity within a day, and screening out the diodes that pass the photosensitive detection, so that the overall quality of the photovoltaic diode can be improved, and the efficiency of converting sunlight into electrical energy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diodes, and more particularly to a photovoltaic diode detection device. Background Art

[0002] Photovoltaic diode is a device that can convert light energy into electrical energy. It is the core component of solar photovoltaic system, which is used to convert sunlight into electrical energy.

[0003] In addition, when the photovoltaic diode is affected by light during the detection process, the photon energy will be absorbed by the electrons in the semiconductor, so that the electrons gain enough energy to jump from the valence band to the conduction band, increasing the number of carriers, thereby increasing the flow of current and further increasing the output current of the photovoltaic diode.

[0004] The current detection method for photovoltaic diodes is to test the diode current and perform performance tests under temperature conditions, thus ignoring the effect of light on the diode. The photovoltaic diode will change its current output according to the light intensity it receives during a day. For example, when the light intensity is equivalent to 15 watts, the diode current output will change from 20MA to 25MA. In this way, the diode will change its output current as the light intensity changes. However, photovoltaic diodes that have not undergone photosensitivity detection will cause some diodes to short-circuit while constantly changing their current output, thereby reducing the efficiency of converting sunlight into electrical energy, and further reducing the quality of the photovoltaic diode. Summary of the invention

[0005] The object of the present invention is to provide a photovoltaic diode detection device to solve the problems raised in the above background technology.

[0006] A photovoltaic diode detection device comprises a device body, wherein a feeding groove is provided at the upper end of the device body, and a rectangular slide groove is provided on the inner cavity surface of the device body, a fixing component is provided at one end of the rectangular slide groove, a photosensitive detection component is connected to the upper end of the fixing component, and an electric telescopic rod is provided below the fixing component, the upper end of the electric telescopic rod is connected to the detection component, and the upper end surface of the photosensitive detection component is fixedly connected to the upper surface of the inner cavity of the device body;

[0007] The fixing assembly includes a first driving motor, a first rotating rod is sleeved on the output end of the first driving motor, first rotating belts are sleeved on the outer surfaces of both ends of the first rotating rod, a first threaded rod is sleeved on one end of each of the first rotating belts away from the rotating rod, a second rotating belt is sleeved on the outer surface of one end of the first threaded rod close to the first driving motor, a second rotating rod is sleeved on one end of the second rotating belt away from the first threaded rod, and the first rotating belt is connected to the first threaded rod by penetrating the device body;

[0008] The photosensitive detection component includes a first gear, the upper end of which is meshed with a first rack, the end of the first rack close to the first gear is connected to a rectangular slider, the lower end of the rectangular slider is connected to a resistor block, the upper end of the resistor block is provided with a sliding groove, and the end of the resistor block away from the first gear is connected to a power transmission line, one end of the power transmission line is connected to a lighting lamp, and the outer side of the resistor block is connected to a rectangular frame, and the upper end surface of the rectangular frame is fixedly connected to the upper surface of the inner cavity of the device body, and two lighting lamps are provided, and both lighting lamps are powered by the power transmission line.

[0009] Preferably, one end of the second rotating rod away from the second rotating belt is connected to the first gear, and the rectangular sliding block is slidably connected to the resistance block via a sliding groove.

[0010] Preferably, a first slider is connected to the outer surface of one end of each first threaded rod away from the first rotating belt, and a fixed block is connected to one end of each first slider. An induction component is arranged above the end of the first slider away from the first driving motor, and a first slide groove is provided on the lower surface of the inner cavity of the device body, and the first slider and the fixed block are installed in the inner cavity of the first slide groove, and a triangular fixing groove is provided at one end of each fixed block facing the middle part of the first rotating rod.

[0011] Preferably, the induction component includes an induction lamp, the end of the induction lamp is connected to a first power transmission line, the two ends of the first power transmission line are connected to lifting blocks, each of the lifting blocks is connected to a guide rod at one end away from the induction lamp, and each of the lifting blocks is slidably connected to a circular guide block at one end away from the guide rod, a return spring is sleeved on the outer surface of the lower end of each circular guide block, a rectangular connecting block is arranged on the outer side of each return spring, and a third slide groove is opened on the surface of each rectangular connecting block near one end of the return spring, the circular guide block is installed in the inner cavity of the third slide groove, and one rectangular connecting block is fixed on the outer surface of the first slider, and the other rectangular connecting block is fixed on the outer surface of the fixed block, and the two guide rods are located at the lower ends of the two end leads of the diode.

[0012] Preferably, one end of each first threaded rod close to the first rotating belt is rotatably connected to the inner wall of the device body, the first threaded rod is rotatably connected to the first rotating rod through the first rotating belt, and the second rotating rod is rotatably connected to the first threaded rod through the second rotating belt.

[0013] Preferably, the detection component includes a placement block, and second racks are connected to both sides of one end of the placement block away from the photosensitive detection component, each of the second racks is meshed with a second gear at one end away from the placement block, and each of the second gears is connected to a first friction wheel at one end away from the placement block.

[0014] Preferably, each of the first friction wheels is meshed with a second friction wheel at one end close to the second rack, each of the second friction wheels is sleeved with a third rotating belt at one end away from the placing block, each of the third rotating belt is sleeved with a second threaded rod at one end away from the second friction wheel, and each of the second friction wheels is sleeved with a rectangular sliding block at one end away from the third rotating belt, the upper end of each rectangular sliding block is connected to a circular electrode block, the lower end of each circular electrode block is connected to a semi-arc supporting plate, each of the semi-arc supporting plates is provided with a guide groove at one end away from the third rotating belt, and the second threaded rod is rotatably connected to the second friction wheel through the third rotating belt.

[0015] Preferably, an arc-shaped groove is provided on the upper end surface of the placement block, the diameter of the second friction wheel is equal to one-fourth of the diameter of the first friction wheel, the rectangular sliding block is connected to the circular electrode block through a penetrating guide groove, and the end of the semi-arc support plate close to the guide groove is connected to the inner wall of the device body, and at the same time, the center of the semi-arc support plate and the center point of the triangular groove provided at one end of the fixed block are on the same plane, and the circular electrode block is slidingly connected to the semi-arc support plate through the guide groove.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. In the present invention, the first driving motor drives the fixed block to move toward the photovoltaic diode until the fixed block contacts the outer surface of the photovoltaic diode, and the fixed block changes the resistance value of the resistor block during the movement, so that the light intensity of the lighting lamp becomes stronger and stronger, thereby simulating the sunlight intensity in a day and screening out the diodes that pass the photosensitive detection. This can improve the overall quality of the photovoltaic diode and ensure that the photovoltaic diode can convert sunlight into electrical energy under light of different intensities, thereby improving the working efficiency of the photovoltaic diode.

[0018] 2. In the present invention, the downward movement of the placement block will drive the two circular electrode blocks to move toward the direction of the photovoltaic diode until the two circular electrode blocks touch the outer surfaces of both ends of the photovoltaic diode, thus forming a complete loop and performing current and voltage tests, thereby realizing automatic detection of the diode. At the same time, the photovoltaic diode can also be calibrated so that the tube body of the diode is located in the center of the two fixed blocks during the detection process. During the current and voltage test of the photovoltaic diode, if a short circuit occurs, the induction lamp will stop emitting light, thereby screening out photovoltaic diodes that do not meet the production requirements, thereby improving the overall quality of the photovoltaic diode.

[0019] 3. In the present invention, the photovoltaic diode is placed in the semi-arc groove opened at the upper end of the placement block, and then the electric telescopic rod is started to allow the placement block to drive the photovoltaic diode to move downward. When the two ends of the photovoltaic diode contact the semi-arc support plate, the downward movement is stopped. In this way, the photovoltaic diode can be automatically fed to avoid the photovoltaic diode from being broken during the loading process, thereby reducing the loss rate of the photovoltaic diode. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a partial structural schematic diagram of the present invention.

[0022] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the fixing component of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the sensing component of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the photosensitive detection component of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the detection component of the present invention.

[0027] Explanation of the reference numerals in the figure: 1. device body; 2. feeding groove; 3. rectangular slide; 4. fixing assembly; 401. first driving motor; 402. first rotating rod; 403. first rotating belt; 404. first threaded rod; 405. first sliding block; 406. fixing block; 407. second rotating belt; 408. second rotating rod; 409. induction assembly; 410. induction lamp; 411. first transmission line; 412. lifting block; 413. guide rod; 414. circular guide block; 415. reset spring; 416. rectangular connecting block; 5 , photosensitive detection component; 501, first gear; 502, first rack; 503, rectangular slider; 504, resistor block; 505, sliding groove; 506, transmission line; 507, lighting lamp; 6, electric telescopic rod; 7, detection component; 701, placement block; 702, second rack; 703, second gear; 704, first friction wheel; 705, second friction wheel; 706, third rotating belt; 707, second threaded rod; 708, circular electrode block; 709, semi-arc support plate; 710, guide groove; 711, rectangular sliding block. DETAILED DESCRIPTION

[0028] Example: See Figure 1 , Figure 2 and Figure 3 A photovoltaic diode detection device comprises a device body 1, a feeding groove 2 is provided at the upper end of the device body 1, and a rectangular chute 3 is provided on the inner cavity surface of the device body 1, a fixing component 4 is provided at one end of the rectangular chute 3, a photosensitive detection component 5 is connected to the upper end of the fixing component 4, and an electric telescopic rod 6 is provided below the fixing component 4, a detection component 7 is connected to the upper end of the electric telescopic rod 6, and the upper end surface of the photosensitive detection component 5 is fixedly connected to the upper surface of the inner cavity of the device body 1;

[0029] See also Figure 4 The fixing assembly 4 includes a first driving motor 401, the output end of the first driving motor 401 is sleeved with a first rotating rod 402, the outer surfaces of both ends of the first rotating rod 402 are sleeved with first rotating belts 403, one end of each first rotating belt 403 away from the first rotating rod 402 is sleeved with a first threaded rod 404, the outer surface of one end of the first threaded rod 404 close to the first driving motor 401 is sleeved with a second rotating belt 407, and one end of the second rotating belt 407 away from the first threaded rod 404 is sleeved with a second rotating rod 408, and the first rotating belt 403 is connected to the first threaded rod 404 by penetrating the device body 1;

[0030] See also Figure 6The photosensitive detection component 5 includes a first gear 501, the upper end of the first gear 501 is meshed with a first rack 502, the end of the first rack 502 close to the first gear 501 is connected to a rectangular slider 503, the lower end of the rectangular slider 503 is connected to a resistor block 504, the upper end of the resistor block 504 is provided with a sliding groove 505, and the end of the resistor block 504 away from the first gear 501 is connected to a power transmission line 506, one end of the power transmission line 506 is connected to a lighting lamp 507, and the outer side of the resistor block 504 is connected to a rectangular frame, and the upper end surface of the rectangular frame is fixedly connected to the upper surface of the inner cavity of the device body 1, and two lighting lamps 507 are provided, and the lighting lamps 507 are both powered by the power transmission line 506.

[0031] One end of the second rotating rod 408 away from the second rotating belt 407 is connected to the first gear 501 , and the rectangular sliding block 503 is slidably connected to the resistance block 504 through the sliding groove 505 .

[0032] See also Figure 4 A first slider 405 is connected to the outer surface of one end of each first threaded rod 404 away from the first rotating belt 403, and a fixed block 406 is connected to one end of each first slider 405. A sensing component 409 is arranged above the end of the first slider 405 away from the first driving motor 401, and a first slide groove is opened on the lower surface of the inner cavity of the device body 1, and the first slider 405 and the fixed block 406 are installed in the inner cavity of the first slide groove, and a triangular fixing groove is opened at one end of each fixed block 406 facing the middle part of the first rotating rod 402.

[0033] See also Figure 5 The sensing component 409 includes a sensing lamp 410, the end of the sensing lamp 410 is connected to a first transmission line 411, and both ends of the first transmission line 411 are connected to lifting blocks 412, and one end of each lifting block 412 away from the sensing lamp 410 is connected to a guide rod 413, and one end of each lifting block 412 away from the guide rod 413 is slidably connected to a circular guide block 414, and a return spring 415 is sleeved on the outer surface of the lower end of each circular guide block 414, and a rectangular connecting block 416 is arranged on the outer side of each return spring 415, and a third sliding groove is opened on the surface of one end of each rectangular connecting block 416 near the return spring 415, and the circular guide block 414 is installed in the inner cavity of the third sliding groove, and one rectangular connecting block 416 is fixed on the outer surface of the first slider 405, and the other rectangular connecting block 416 is fixed on the outer surface of the fixed block 406, and the positions of the two guide rods 413 are located at the lower ends of the two end leads of the diode.

[0034] Specifically, the first driving motor 401 drives the fixed block 406 to move toward the photovoltaic diode until the fixed block 406 contacts the outer surface of the photovoltaic diode, and the fixed block 406 changes the resistance value of the resistor block 504 during the movement, so that the light intensity of the lighting lamp 507 becomes stronger and stronger, thereby simulating the sunlight intensity in a day and screening out the diodes that pass the photosensitivity detection, thereby improving the overall quality of the photovoltaic diode.

[0035] One end of each first threaded rod 404 close to the first rotating belt 403 is rotatably connected to the inner wall of the device body 1, the first threaded rod 404 is rotatably connected to the first rotating rod 402 through the first rotating belt 403, and the second rotating rod 408 is rotatably connected to the first threaded rod 404 through the second rotating belt 407.

[0036] See also Figure 7 The detection component 7 includes a placement block 701, and the second racks 702 are connected on both sides of the end of the placement block 701 away from the photosensitive detection component 5, and each second rack 702 is meshed with a second gear 703 on the end away from the placement block 701, and each second gear 703 is connected to a first friction wheel 704 on the end away from the placement block 701, and the rectangular slide 3 is matched with the placement block 701, and the bottom end of the rectangular slide 3 is located above the first rotating rod 402. When the placement block 701 moves to the bottom end of the rectangular slide 3, it stops moving downward, and the lower end of the placement block 701 is connected to electric telescopic rods 6 on both sides.

[0037] See also Figure 7 , one end of each first friction wheel 704 close to the second rack 702 is meshed with a second friction wheel 705, one end of each second friction wheel 705 away from the placement block 701 is sleeved with a third rotating belt 706, one end of each third rotating belt 706 away from the second friction wheel 705 is sleeved with a second threaded rod 707, and the outer side of one end of each second friction wheel 705 away from the third rotating belt 706 is sleeved with a rectangular sliding block 711, the upper end of each rectangular sliding block 711 is connected to a circular electrode block 708, the lower end of each circular electrode block 708 is connected to a semi-arc support plate 709, and a guide groove 710 is provided at one end of each semi-arc support plate 709 away from the third rotating belt 706, and the second threaded rod 707 is rotationally connected to the second friction wheel 705 through the third rotating belt 706.

[0038] Specifically, the downward movement of the placement block 701 will drive the two circular electrode blocks 708 to move toward the direction of the photovoltaic diode until the two circular electrode blocks 708 touch the outer surfaces of the two ends of the photovoltaic diode. This will form a complete loop and perform current and voltage tests, thereby realizing automatic detection of the diode. At the same time, the photovoltaic diode can also be calibrated so that the tube body of the diode is located in the center of the two fixed blocks 406 during the detection process. During the current and voltage test of the photovoltaic diode, if a short circuit occurs, the induction lamp 410 will stop emitting light, thereby screening out photovoltaic diodes that do not meet the production requirements, thereby improving the overall quality of the photovoltaic diode.

[0039] An arc-shaped groove is provided on the upper end surface of the placement block 701, the diameter of the second friction wheel 705 is equal to one-fourth the diameter of the first friction wheel 704, the rectangular sliding block 711 is connected to the circular electrode block 708 by penetrating the guide groove 710, and the end of the semi-arc support plate 709 close to the guide groove 710 is connected to the inner wall of the device body 1, and at the same time, the center of the semi-arc support plate 709 and the center point of the triangular groove provided at one end of the fixed block 406 are on the same plane, and the circular electrode block 708 is slidingly connected to the semi-arc support plate 709 through the guide groove 710.

[0040] Specifically, the photovoltaic diode is placed in the semi-arc groove opened at the upper end of the placement block 701, and then the electric telescopic rod 6 is started to allow the placement block 701 to drive the photovoltaic diode to move downward. When the two ends of the photovoltaic diode contact the semi-arc support plate 709, the downward movement is stopped. In this way, the photovoltaic diode can be automatically fed to avoid the photovoltaic diode from being broken during the loading process, thereby reducing the loss rate of the photovoltaic diode.

[0041] Working principle: first, place the core part of the photovoltaic diode that needs to be tested in the inner cavity of the semi-arc groove opened at the upper end of the placement block 701, then start the electric telescopic rod 6 and retract it downward, thereby driving the placement block 701 to move downward. As the placement block 701 moves downward, it will drive the photovoltaic diode to move downward along the feeding groove 2. When the leads at both ends of the photovoltaic diode touch the upper end surface of the semi-arc support plate 709, it stops moving downward. During the downward movement of the photovoltaic diode, a downward force will be generated on the guide rod 413, so that the lifting block 412 moves downward along the circular guide block 414 until the photovoltaic diode stops moving downward.

[0042] When the photovoltaic diode stops moving downward, the placement block 701 continues to move downward, and in the process of the placement block 701 moving downward, the second rack 702 connected to both sides of one end of the placement block 701 will drive the second gear 703 to rotate, thereby driving the first friction wheel 704 to rotate, and then driving the second friction wheel 705 to rotate. The rotation of the second friction wheel 705 will drive the third rotating belt 706 to rotate, thereby driving the second threaded rod 707 to rotate, and then driving the rectangular sliding block 711 and the circular electrode block 708 to move along the guide groove 710 toward the direction of the photovoltaic diode. When the placement block 701 moves to the bottom of the rectangular slide groove 3, the circular electrode blocks 708 at both ends of the photovoltaic diode will contact the end of the lead, so as to detect the current of the photovoltaic diode. After the pins at both ends of the photovoltaic diode are energized, the power will be transmitted to the induction lamp 410 through the guide rod 413 and the first transmission line 411, and it will emit light;

[0043] When the photovoltaic diode is in the process of current detection, the first driving motor 401 is started and the first rotating rod 402 is driven to rotate slowly, thereby driving the first rotating belt 403 sleeved on the outer surfaces of both ends of the first rotating rod 402 to rotate, and then driving the first threaded rod 404 to rotate. The rotation of the first threaded rod 404 will drive the two fixing blocks 406 to move in the direction of the photovoltaic diode until the two fixing blocks 406 fix the photovoltaic diode. In the process of the first threaded rod 404 rotating, the second rotating belt 407 will be driven to rotate, thereby driving the rotation of the second rotating rod 408, and then driving the rotation of the first gear 501. As the first gear The rotation of 501 will drive the rotation of the first rack 502, thereby driving the rectangular slider 503 to move along the sliding groove 505, thereby reducing the resistance value, and then making the light intensity of the lighting lamp 507 stronger and stronger, and performing photosensitivity detection on the photovoltaic diode to test the current change of the photovoltaic diode under different light intensities. If the photovoltaic diode has a current load under the light intensity, causing the diode to short-circuit, the induction lamp 410 will not emit light, and it also means that the photovoltaic diode test is unqualified, and the unqualified photovoltaic diodes are screened out. If the photovoltaic diode passes the photosensitivity detection, it means that the photovoltaic diode is qualified, and all operations are ended here.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A photovoltaic diode detection device, comprising a device body (1), characterized in that: A feeding groove (2) is provided at the upper end of the device body (1), and a rectangular slide groove (3) is provided on the inner cavity surface of the device body (1); a fixing component (4) is provided at one end of the rectangular slide groove (3); a photosensitive detection component (5) is connected to the upper end of the fixing component (4); an electric telescopic rod (6) is provided below the fixing component (4); and a detection component (7) is connected to the upper end of the electric telescopic rod (6); The fixing assembly (4) comprises a first driving motor (401), the output end of the first driving motor (401) is sleeved with a first rotating rod (402), the outer surfaces of both ends of the first rotating rod (402) are sleeved with first rotating belts (403), one end of each of the first rotating belts (403) away from the first rotating rod (402) is sleeved with a first threaded rod (404), the outer surface of one end of the first threaded rod (404) close to the first driving motor (401) is sleeved with a second rotating belt (407), and one end of the second rotating belt (407) away from the first threaded rod (404) is sleeved with a second rotating rod (408); The photosensitive detection component (5) comprises a first gear (501), the upper end of the first gear (501) is meshed with a first rack (502), one end of the first rack (502) close to the first gear (501) is connected to a rectangular slider (503), the lower end of the rectangular slider (503) is connected to a resistor block (504), the upper end of the resistor block (504) is provided with a sliding groove (505), and one end of the resistor block (504) away from the first gear (501) is connected to a power transmission line (506), and one end of the power transmission line (506) is connected to a lighting lamp (507).

2. A photovoltaic diode detection device according to claim 1, characterized in that: One end of the second rotating rod (408) away from the second rotating belt (407) is connected to a first gear (501), and the rectangular sliding block (503) is slidingly connected to the resistance block (504) via a sliding groove (505).

3. A photovoltaic diode detection device according to claim 1, characterized in that: A first slider (405) is connected to the outer surface of one end of each first threaded rod (404) away from the first rotating belt (403), one end of each first slider (405) is connected to a fixing block (406), and an induction component (409) is arranged above one end of the first slider (405) away from the first driving motor (401).

4. A photovoltaic diode detection device according to claim 3, characterized in that: The induction component (409) comprises an induction lamp (410), the end of the induction lamp (410) is connected to a first transmission line (411), both ends of the first transmission line (411) are connected to lifting blocks (412), one end of each lifting block (412) away from the induction lamp (410) is connected to a flow guide rod (413), and one end of each lifting block (412) away from the flow guide rod (413) is slidably connected to a circular guide block (414), a return spring (415) is sleeved on the outer surface of the lower end of each circular guide block (414), and a rectangular connection block (416) is arranged on the outer side of each return spring (415).

5. A photovoltaic diode detection device according to claim 4, characterized in that: One end of each of the first threaded rods (404) close to the first rotating belt (403) is rotatably connected to the inner wall of the device body (1); the first threaded rod (404) is rotatably connected to the first rotating rod (402) via the first rotating belt (403); and the second rotating rod (408) is rotatably connected to the first threaded rod (404) via the second rotating belt (407).

6. A photovoltaic diode detection device according to claim 1, characterized in that: The detection component (7) comprises a placement block (701), and second racks (702) are connected to both sides of one end of the placement block (701) away from the photosensitive detection component (5), and each of the second racks (702) is meshed with a second gear (703) at one end away from the placement block (701), and each of the second gears (703) is connected to a first friction wheel (704) at one end away from the placement block (701).

7. A photovoltaic diode detection device according to claim 6, characterized in that: One end of each of the first friction wheels (704) close to the second rack (702) is meshed with a second friction wheel (705); one end of each of the second friction wheels (705) away from the placement block (701) is sleeved with a third rotating belt (706); one end of each of the third rotating belts (706) away from the second friction wheel (705) is sleeved with a second threaded rod (707); one end of each of the second friction wheels (705) away from the third rotating belt (706) is sleeved with a rectangular sliding block (711) on the outer side; the upper end of each of the rectangular sliding blocks (711) is connected to a circular electrode block (708); the lower end of each of the circular electrode blocks (708) is connected to a semi-arc support plate (709); and one end of each of the semi-arc support plates (709) away from the third rotating belt (706) is provided with a guide groove (710).

8. A photovoltaic diode detection device according to claim 7, characterized in that: An arc-shaped groove is provided on the upper end surface of the placement block (701); the diameter of the second friction wheel (705) is equal to one-fourth of the diameter of the first friction wheel (704); and the rectangular sliding block (711) is connected to the circular electrode block (708) via a penetrating guide groove (710).

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