Automatic switching device for different waveband filters

Abstract

The utility model relates to a kind of different waveband filter automatic switching device, including fixed plate, lifting platform, camera, still including filter platform, the lifting platform is assembled on lifting mechanism, lifting platform is equipped with camera, the light-transmitting hole is opened in lifting platform, the lens of camera is aligned with light-transmitting hole, filter platform is equipped between the camera and lifting platform, filter platform and lifting platform are mutually parallel, and not contact, the filter platform is assembled on side slide platform, side slide platform is assembled on lifting platform, at least two through holes are opened in the filter platform, the filter platform is assembled in the through hole place, the utility model can use a camera, filter platform is moved by side slide platform, to replace different filter, realize the photography of different waveband, save cost;By adjusting object distance, realize focusing, so that the imaging of different waveband is more clear, test rhythm is compact, and test efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of solar cell testing technology, and in particular to an automatic switching device for filters of different wavelength bands. Background Technology

[0002] Tandem solar cells typically employ a multi-junction stacked design. A typical triple-junction gallium arsenide (GaAs) cell consists of GaInP (top junction, ~1.8 eV), GaAs (middle junction, ~1.42 eV), and Ge (bottom junction, ~0.67 eV), each absorbing different wavelengths of sunlight. Electron imaging (EL) is a commonly used inspection method for solar cells. Its principle is as follows: First, defect detection identifies abnormal areas such as dark spots and dark lines, locating material defects or process problems (such as cracks or poor contact). Then, efficiency distribution is evaluated, analyzing the carrier transport characteristics and efficiency distribution of each sub-junction through brightness uniformity analysis. Finally, structural verification verifies the quality of the tunneling junction and interconnect layer, ensuring that each sub-junction works collaboratively. Therefore, EL imaging of GaAs multi-junction cells achieves efficient detection of material quality and process defects in each junction by exciting the radiative recombination emission of each sub-junction and combining it with wavelength resolution technology. EL images are captured using a compatible camera. The effects of filters and the exposure of the film are used to understand the intrinsic transitions in spontaneous emission. The relationship between minority carrier lifetime, density, and light intensity is analyzed, and the exposure of the film is used to determine the presence of defects in the silicon wafer. EL testing uses one camera to capture images of the top-mounted cell twice. This translates to 62 pixels per mm of a 150mm test stage, or 0.016mm / pixel (9344 / 150mm). Different filters are used to simultaneously acquire and image EL images in band 1 (640nm–690nm) and band 2 (850–950nm), which are saved and displayed on a screen. Defect classification (such as microcracks) is performed manually or automatically.

[0003] Currently, two cameras are generally used, each corresponding to a different filter, for image capture. For example, Chinese patent document with application number 202510244409.6 discloses a multimodal perovskite and tandem solar cell integrated testing system and method. The system includes a darkroom, a testing platform, an LED light source module, a CCD camera, a laser, an adjustable constant current source, an electronic load, and a host computer. The darkroom is used to shield ambient light and provide a dark testing environment. The testing platform is installed inside the darkroom and is used to place the battery under test. The LED light source module is used to provide the test light source. The CCD camera is used to capture the light signal generated by the battery under test during the test. Furthermore, there are two CCD cameras (3), and the two CCD cameras (3) are equipped with different filters to capture light signals of different wavelengths. This method has the following disadvantages: First, the camera cost itself is high. One tester uses two cameras, and other supporting mechanisms also need to be increased accordingly, which significantly increases the cost. Second, the solar cell needs to be moved under the two cameras, and the relevant actions need to be performed twice, resulting in low testing efficiency. Summary of the Invention

[0004] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide an automatic switching device for filters of different wavelength bands.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automatic switching device for different band filters, including a fixed plate, a lifting platform, a camera, and a filter platform. The lifting platform is mounted on a lifting mechanism and has a camera. A light-transmitting hole is opened on the lifting platform, and the lens of the camera is aligned with the light-transmitting hole. A filter platform is provided between the camera and the lifting platform. The filter platform and the lifting platform are parallel to each other and do not contact each other. The filter platform is mounted on a side slide, which is mounted on the lifting platform. At least two through holes are opened on the filter platform, and filters are installed at the through holes. Driven by the side slide, the filter platform can move along the upper surface of the lifting platform to change different filters in order to take pictures of different bands.

[0006] Specifically, the lifting mechanism includes a servo motor, a lead screw body, and a lead screw nut. The output end of the servo motor is connected to the upper end of the lead screw body via a coupling. The lead screw body is equipped with a lead screw nut, which is mounted on a lifting plate. The lifting plate is fixed to a lifting back plate, which is fixed to one side of the lifting platform.

[0007] Specifically, the fixed plate is provided with a lifting slide rail, the lifting slide rail is equipped with a lifting slider, the lifting slider is fixedly installed on the lifting back plate, and there are two lifting slide rails.

[0008] Specifically, the filter is mounted at the through hole of the support plate, and the support plate is detachably mounted on the filter table by bolts.

[0009] Specifically, the side slide table includes a slide table cylinder and a side slide rail. The slide table cylinder is fixedly mounted on the lifting back plate, and the side slide rail is mounted on the slide table cylinder. A vertical connecting plate is fixedly provided at the end of the telescopic rod of the slide table cylinder. A horizontal connecting plate is provided on one side of the vertical connecting plate. The horizontal connecting plate is fixed on the filter table. A side slide groove is opened on the horizontal connecting plate, and the side slide rail is mounted in the side slide groove.

[0010] Specifically, the fixed plate is equipped with a photoelectric sensor, and the lifting platform is equipped with a photoelectric sensing sheet. The photoelectric sensor is a slotted photoelectric sensor, and the photoelectric sensing sheet is located on the side of the lifting slider.

[0011] Specifically, a camera mounting plate is provided on the front side of the lifting back panel, and a camera connecting plate is installed on the camera mounting plate by bolts. The camera mounting plate is detachably connected to the camera housing.

[0012] Specifically, it also includes a lifting mounting frame, which includes an upper frame plate, a vertical support plate, and a lower frame plate. The upper frame plate and the lower frame plate are located on both sides of the vertical support plate. The vertical support plate is fixedly mounted on a fixed plate by bolts. The servo motor is mounted on the upper frame plate. An upper lead screw support is mounted on the lower frame plate. The upper end of the lead screw body is mounted on the upper lead screw support and passes through the upper lead screw support to connect with a coupling. The lower end of the lead screw body is mounted on the lower lead screw support, which is fixedly mounted below the fixed plate.

[0013] The beneficial effects of this utility model are as follows: This utility model can use a single camera, which drives the filter stage to move via a side slide to change different filters and achieve shooting at different wavelengths, thus saving costs; under the drive of the lifting mechanism, the shooting distance can be adjusted to achieve focusing, making the imaging of different wavelengths clearer; the design of the lifting mechanism and the side slide makes the movement of the camera and the filter stage more stable and the space more compact, ensuring effective testing; the lifting platform and the side slide have small movement ranges, the testing cycle is compact, there is no need to move the battery cells or other coordinated actions, and the testing efficiency is high. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0016] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0017] Figure 4 This is a side view of the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of this utility model without the camera assembled.

[0019] Figure 6 This is a schematic diagram of the side slide structure of this utility model.

[0020] In the diagram: 1. Fixed plate; 2. Lifting platform; 201. Lifting back plate; 202. Lifting slider; 203. Lifting slide rail; 204. Lifting plate; 205. Camera mounting plate; 3. Servo motor; 301. Coupling; 302. Lead screw body; 303. Lead screw nut; 304. Upper lead screw support; 305. Lower lead screw support; 4. Filter stage; 401. Vertical connecting plate; 402. Horizontal connecting plate; 5. Filter; 501. Support plate; 6. Lifting mounting frame; 601. Upper frame plate; 602. Vertical support plate; 603. Lower frame plate; 7. Camera; 701. Camera mounting plate; 702. Lens; 8. Side slide; 801. Slide cylinder; 802. Side slide rail. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] like Figures 1 to 6 The device shown is an automatic switching device for different band filters, including a fixed plate 1, a lifting platform 2, a camera 7, and a filter platform 4. The lifting platform 2 is mounted on a lifting mechanism and has a camera 7 mounted on it. The lifting platform 2 has a light-transmitting hole, and the lens 702 of the camera 7 is aligned with the light-transmitting hole. The filter platform 4 is located between the camera 7 and the lifting platform 2. The filter platform 4 and the lifting platform 2 are parallel to each other and do not contact each other. The filter platform 4 is mounted on a side slide 8, which is mounted on the lifting platform 2. The filter platform 4 has at least two through holes, and filters 5 of different models are mounted at the through holes. The filters 5 can move along the upper surface of the lifting platform 2 under the action of the side slide 8.

[0023] The principle is as follows: the fixing plate 1 is assembled in a suitable position above the test platform, the battery cell to be tested is placed on the test platform and powered on. At a specific distance, the first band filter 5 is aligned with the light-transmitting hole to take a picture in the first band (640nm~690nm). After the picture is taken, the side slide is activated, which moves the second band filter 5 to the light-transmitting hole. At the same time, the lifting platform moves the camera 7 and the filter 5 to adjust the object distance and achieve focus in the second band (850~950nm). This is to avoid the inability to focus due to different bands, which would affect the clarity. Through the lifting structure, a single camera can obtain clear images in two bands.

[0024] Specifically, the lifting mechanism includes a servo motor 3, a lead screw body 302, and a lead screw nut 303. The output end of the servo motor 3 is connected to the upper end of the lead screw body 302 via a coupling 301. The lead screw body 302 is equipped with a lead screw nut 303, which is mounted on a lifting plate 204. The lifting plate 204 is fixed to a lifting back plate 201, which is fixed to one side of the lifting platform 2. When the servo motor 3 drives the lead screw body 302 to rotate, the lead screw nut 303 on the lead screw body 302 moves up and down along the lead screw body 302, thereby driving the lifting platform 2 to move up and down.

[0025] Specifically, the fixed plate 1 is provided with a lifting slide rail 203, and a lifting slider 202 is mounted on the lifting slide rail 203. The lifting slider 202 is fixedly installed on the lifting back plate 201. There are two lifting slide rails 203, which can make the lifting platform 2 more stable when the lifting mechanism is running.

[0026] Specifically, the filter 5 is assembled at the through hole of the support plate 501, and the support plate 501 is detachably assembled on the filter stage 4 by bolts.

[0027] Specifically, the side slide table 8 includes a slide table cylinder 801 and a side slide rail 802. The slide table cylinder 801 is fixedly mounted on the lifting back plate 201, and the side slide rail 802 is mounted on the slide table cylinder 801. A vertical connecting plate 401 is fixedly provided at the end of the telescopic rod of the slide table cylinder 801. A horizontal connecting plate 402 is provided on one side of the vertical connecting plate 401. The horizontal connecting plate 402 is fixed on the filter table 4. A side slide groove is provided on the horizontal connecting plate 402, and the side slide rail 802 is mounted in the side slide groove. The side slide rail 802 can move relative to the side slide groove. In this way, the filter table 4 is moved laterally by the side rail cylinder 402. The cooperation of the side slide rail 802 and the side slide groove can make the operation of the filter table 4 more stable. The side slide rail 802 is fixed on the slide table cylinder 801, which can also save space.

[0028] Specifically, the fixed plate 1 is equipped with a photoelectric sensor 9, and the lifting platform 2 is equipped with a photoelectric sensing sheet 901. When the photoelectric sensing sheet reaches the photoelectric sensor 9, it will transmit a signal to the controller to stop the lifting mechanism. Furthermore, the photoelectric sensor 9 is a slotted photoelectric sensor, and the photoelectric sensing sheet 901 is located on the side of the lifting slider 202. The photoelectric sensing sheet 901 can be inserted into the slot of the photoelectric sensor 9, making its position sensing more accurate and effectively ensuring the height of the lifting platform 2, thereby ensuring that the optimal object distance can be achieved and making the imaging clearer.

[0029] Specifically, the lifting back panel 201 has a camera mounting plate 205 on its front side. A camera connecting plate 701 is mounted on the camera mounting plate 205 by bolts. The camera mounting plate 701 is detachably connected to the camera housing. This detachable structure facilitates later maintenance.

[0030] Specifically, it also includes a lifting mounting frame 6, which includes an upper frame plate 601, a vertical support plate 602, and a lower frame plate 603. The upper frame plate 601 and the lower frame plate 603 are located on both sides of the vertical support plate 602. The vertical support plate 602 is fixedly mounted on the fixed plate 1 by bolts. The servo motor 3 is mounted on the upper frame plate 601. An upper lead screw support 304 is mounted on the lower frame plate 602. The upper end of the lead screw body 302 is mounted on the upper lead screw support 304. The upper end of the lead screw body 302 passes through the upper lead screw support 304 and is connected to the coupling 301. The lower end of the lead screw body 302 is mounted on the lower lead screw support 305. The lower lead screw support 305 is fixedly mounted below the fixed plate 1. This makes the lead screw body 302 less prone to deformation and makes the operation more stable.

[0031] For example, in this embodiment, the EL test uses a 65-megapixel camera to capture images of the top and middle cells of the stacked solar cells in two separate shots. This translates to 62 pixels per mm of the 150mm test stage, or 0.016mm / pixel (9344 / 150mm). Two different filters are used: one captures images in the first wavelength band (640nm–690nm), and the other captures images in the second wavelength band (850–950nm). The camera is connected to a PC, which uses existing software to display the EL images on the top and middle sides of the software interface connected to the camera, corresponding to the EL image areas of the cells in their respective wavelength bands. Defect classification (such as microcracks) can be performed manually or automatically. The software can also be used to switch the image wavelength bands to be captured. This is a specific usage method, existing technology, and is only used to illustrate its usage without further protection; it will not be elaborated upon here.

[0032] Based on capturing one solar cell image twice, with a combined image size of 60MB, and assuming a rate of 92 cells per hour and 15 hours of operation per day, the total testing capacity at full production is approximately 15 * 92 * 60 ≈ 83GB, effectively improving testing efficiency. In use, a 4TB hard drive is sufficient, allowing for up to (1024 * 4) / 83GB = 49 days of local image storage. It can connect to a server, automatically deleting images after a certain period of local retention following upload.

[0033] This utility model is not limited to the described embodiments. Anyone should know that any structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

[0034] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A different waveband filter automatic switching device, comprising a fixed plate, a lifting platform, a camera, characterized in that: It also includes a filter table, the lifting platform is mounted on the lifting mechanism, the lifting platform is equipped with a camera, the lifting platform has a light-transmitting hole, the camera lens is aligned with the light-transmitting hole, the filter table is provided between the camera and the lifting platform, the filter table and the lifting platform are parallel to each other and do not contact each other, the filter table is mounted on a side slide, the side slide is mounted on the lifting platform, the filter table has at least two through holes, and a filter is installed at the through holes.

2. The automatic switching device of different waveband filter according to claim 1, characterized in that: The lifting mechanism includes a servo motor, a lead screw body, and a lead screw nut. The output end of the servo motor is connected to the upper end of the lead screw body via a coupling. The lead screw body is equipped with a lead screw nut, which is mounted on a lifting plate. The lifting plate is fixed to a lifting back plate, which is fixed to one side of the lifting platform.

3. The automatic switching device of different waveband filter according to claim 2, characterized in that: The fixed plate is provided with a lifting slide rail, and a lifting slider is mounted on the lifting slide rail. The lifting slider is fixedly installed on the lifting back plate, and there are two lifting slide rails.

4. The automatic switching device of different waveband filter according to claim 2, characterized in that: The side slide table includes a slide table cylinder and a side slide rail. The slide table cylinder is fixedly mounted on the lifting back plate, and the side slide rail is mounted on the slide table cylinder. A vertical connecting plate is fixedly provided at the end of the telescopic rod of the slide table cylinder. A horizontal connecting plate is provided on one side of the vertical connecting plate. The horizontal connecting plate is fixed on the filter table. A side slide groove is opened on the horizontal connecting plate, and the side slide rail is mounted in the side slide groove.

5. The automatic switching device of different waveband filter according to claim 1 or 2 or 3 or 4, characterized in that: The filter is assembled at the through hole of the support plate, and the support plate is detachably assembled to the filter table by bolts.

6. The automatic switching device of different waveband filter according to claim 1 or 2 or 3 or 4, characterized in that: The fixed plate is equipped with a photoelectric sensor, and the lifting platform is equipped with a photoelectric sensor sheet.

7. The automatic switching device of different waveband filter according to claim 6, characterized in that: The photoelectric sensor is a slotted photoelectric sensor, with the photoelectric sensing element located on the side of the lifting slider.

8. The automatic switching device of different waveband filter according to claim 2 or 3 or 4, characterized in that: The lifting back panel has a camera mounting plate on its front side. A camera connecting plate is installed on the camera mounting plate by bolts. The camera mounting plate is detachably connected to the camera housing.

9. The automatic switching device of different waveband filter according to claim 2 or 3 or 4, characterized in that: It also includes a lifting mounting frame, which includes an upper frame plate, a vertical support plate, and a lower frame plate. The upper frame plate and the lower frame plate are located on both sides of the vertical support plate. The vertical support plate is fixedly mounted on a fixed plate by bolts. The servo motor is mounted on the upper frame plate. An upper lead screw support is mounted on the lower frame plate. The upper end of the lead screw body is mounted on the upper lead screw support and passes through the upper lead screw support to connect with a coupling. The lower end of the lead screw body is mounted on the lower lead screw support, which is fixedly mounted below the fixed plate.

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