Photovoltaic module surface soiling state monitoring device based on spectral radiance collection

Abstract

The application discloses a kind of photovoltaic module surface dust state monitoring device based on spectral radiation force acquisition;Wherein the detection device includes: detector and controller, in detector, emission system horizontal support rod and dust side receiver support rod are fixed to the upper and lower ends of main mounting rod respectively, laser emitter is installed in the end of emission system horizontal support rod by laser emission system mounting frame, dust side power receiver is fixed to the end of dust side receiver support rod, the laser emission part of laser emitter is opposite the dust side power receiver below, the photovoltaic glass plate to be measured is located between laser emitter and dust side power receiver;Dust side power receiver is connected with signal collection and transfer module in controller.The application uses power receiver to collect the spectral radiation force after laser emitter is vertically shot into dust glass plate, instead of the generated power of photovoltaic panel for monitoring, avoid the influence of environmental factors on monitoring index.

Description

Technical Field

[0001] This invention belongs to the field of clean power generation equipment technology, specifically a device for monitoring the surface dust accumulation of photovoltaic modules based on spectral radiative force acquisition. Background Technology

[0002] Photovoltaic power generation is one of the main forms of solar energy utilization. With its decreasing cost, the world's installed photovoltaic capacity continues to increase. To receive solar energy, photovoltaic glass panels need to be installed outdoors. Affected by climate, environment, and geographical factors, dust accumulates on the surface of photovoltaic glass panels to varying degrees. Dust accumulation is one of the main reasons for the power degradation of photovoltaic glass panels. During the photovoltaic power generation process, light passes through the glass and strikes the surface of the solar cells. The light energy excites electrons to jump from the valence band to the conduction band, generating electron-hole pairs. The directional movement of charged particles generates photocurrent. Dust accumulation on the module surface reduces the light incident on the solar cell surface, resulting in fewer electron-hole pairs, thus affecting the maximum power, output power, and conversion efficiency of the photovoltaic glass panel. Previous research has shown that dust accumulation leads to a decrease in the glass transmittance and power of photovoltaic glass panels, which significantly reduces the power output of large-scale photovoltaic power plants and reduces their economic viability. Therefore, dust removal is necessary for photovoltaic power plants.

[0003] A method for monitoring the dust accumulation status of photovoltaic glass panels based on spectral radiative force acquisition has been validated in principle. This method can achieve high-precision and accurate monitoring of dust accumulation status. This achievement has wide applicability, low equipment cost, and is worthy of widespread application, enabling it to become competitive within this technological field. Existing technologies mainly fall into three categories: those based on reflectivity detection, those based on transmittance detection, and those based on relative power change detection.

[0004] Devices that monitor dust accumulation by measuring reflectance changes use a built-in light source to intermittently illuminate a viewing window, thus obtaining reflectance. However, the reflectance variation range is relatively small. Relative power change detection devices use a clean panel and a panel in a naturally dusty state, collecting the power difference between the two to compare the degree of natural dust accumulation. The problem with this method is that power or current is influenced by many factors, making it difficult to accurately reflect power differences. Transmittance monitoring devices consist of two transmittance sensors, one kept relatively clean and the other in a naturally dusty state, determining the dust accumulation state by the difference in transmittance. The problem with this type of device is that ordinary transmittance sensors have large relative errors; if the errors of the two sensors are not consistent, a significant relative error will occur. Summary of the Invention

[0005] To address the problems existing in the background technology, this invention provides a photovoltaic module surface dust accumulation status monitoring device based on spectral radiance acquisition. It achieves monitoring through the spectral radiance of a laser rather than light illumination, thus reducing errors in light intensity, dust accumulation, and spectral radiance magnitude from multiple aspects. The monitoring device comprises a detector and a controller. The detector includes a laser emitter, a laser emission system mounting bracket, a photovoltaic glass panel under test, and a main mounting rod. A horizontal support rod for the emission system and a dust-side receiver support rod are fixed to the upper and lower ends of the main mounting rod, respectively. The laser emitter is mounted on the end of the horizontal support rod of the emission system via the laser emission system mounting bracket. The dust-side power receiver is fixed to the end of the dust-side receiver support rod, with the laser emitting part of the laser emitter facing the dust-side power receiver below. The photovoltaic glass panel under test is located between the laser emitter and the dust-side power receiver. The dust-side power receiver is connected to a signal collection and transmission module in the controller.

[0006] The laser emitter is an 808nm wavelength laser emitter.

[0007] The main mounting rod is equipped with a handle.

[0008] The grip is equipped with a laser emission switch connected to the laser emitter.

[0009] The detector also includes: a beam splitter, a clean photovoltaic glass panel, and a clean-side power receiver. The beam splitter is installed in the laser emission system mounting frame and is positioned between the laser emitting part of the laser emitter and the dust-accumulated power receiver. The clean-side power receiver is fixed in the middle of the main mounting rod and faces the inclined surface of the beam splitter. The clean photovoltaic glass panel is positioned between the clean-side power receiver and the beam splitter and is also installed in the laser emission system mounting frame. The clean-side power receiver is connected to the signal collection and transmission module.

[0010] The monitoring device also includes: a glass plate clamping device, a photovoltaic panel, a stepper motor, a detector holder, and a controller integrating a signal collection and transmission module. The glass plate clamping device is directly fixed to one side of the photovoltaic panel, and the photovoltaic glass plate to be tested is installed in the glass plate clamping device. The housing of the stepper motor is fixedly connected to the glass plate clamping device through a fixed bracket. The power output of the stepper motor is fixedly connected to the detector holder, and the detector holder clamps the main mounting rod of the detector.

[0011] The controller includes: a laser emitting module, a signal collection and transmission module, and a result judgment module connected in sequence, wherein the signal collection and transmission module is connected to the clean-side power receiver, the dust-side power receiver, the laser emitter, and the stepper motor;

[0012] The laser emission module receives the number of collections (m) from an external input and sends this number of collections to the signal collection and transmission module. The signal collection and transmission module then sends m single-collection commands to the laser emitter, while simultaneously receiving clean electrical signals from the clean-side power receiver and dust electrical signals from the dust-side power receiver. After each single-collection command, a single rotation command is sent to the stepper motor to rotate the photovoltaic glass panel under test. After collecting m sets of electrical signals, the signal collection and transmission module sends them to the result judgment module. The result judgment module quickly calculates the average of the differences between the m sets of electrical signals and compares it with the previously measured relationship between the dust density and attenuation power of the photovoltaic glass panel in the laboratory, thus determining the dust accumulation state of the photovoltaic glass panel and outputting either a high or low signal for direct judgment.

[0013] The specific working process of the single collection command is as follows: the original laser beam emitted by the laser emitter hits the beam splitter placed below, and then the beam splitter splits the incident light into transmitted light and reflected laser beams in two directions. The reflected light is perpendicularly shot to the clean side power receiver and collected and converted into a clean electrical signal, which is sent to the signal collection and transmission module in the controller. The transmitted light is perpendicularly shot to the photovoltaic glass panel under test and collected by the dust accumulation side power receiver below, which is converted into a dust accumulation electrical signal and sent to the signal collection and transmission module in the controller.

[0014] The photovoltaic glass panel under test and the photovoltaic panel have the same tilt angle.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The power receiver used collects the spectral radiance after the laser emitter is perpendicularly incident on the dust-accumulating glass plate, which replaces the conventional method of monitoring the power generation generated by the photovoltaic glass plate, thus avoiding the influence of environmental factors on the monitoring indicators.

[0017] 2. It solves the contradiction between the cost and measurement accuracy of traditional monitoring instruments, so that the data does not need to be verified and the results can be directly output, which basically eliminates the error. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of an embodiment 1 of a photovoltaic module surface ash accumulation state monitoring device based on spectral radiative force acquisition according to the present invention;

[0019] Figure 2 This is a front view schematic diagram of Embodiment 2 of the present invention;

[0020] Figure 3 This is a front view schematic diagram of Embodiment 3 of the present invention;

[0021] Figure 4This is a schematic diagram of the working process of the controller in Embodiment 3 of the present invention;

[0022] Figure 5 This is an experimental distribution diagram of the process of obtaining the relationship threshold in Embodiment 3 of the present invention.

[0023] Among them, 1-detector, 2-photovoltaic panel, 3-fixed bracket, 4-main mounting rod, 5-glass plate clamping device, 6-stepper motor, 7-horizontal support rod of the emission system, 8-dust-side receiver support rod, 9-detector clamp, 41-handle, 101-laser emitter, 102-beam splitter, 103-laser emission system mounting frame, 203-clean photovoltaic glass panel, 204-clean side power receiver, 409-dust-side power receiver, 410-photovoltaic glass panel under test. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 The monitoring device shown in Embodiment 1 of the present invention includes: a detector 1 and a controller (not shown in the figure).

[0026] The testing instrument 1 includes: a laser emitter 101, a laser emission system mounting bracket 103, a photovoltaic glass panel 410 to be tested, and a main mounting rod 4. The horizontal support rod 7 of the emission system and the dust-side receiver support rod 8 are respectively fixed to the upper and lower ends of the main mounting rod 4. The laser emitter 101 is mounted on the end of the horizontal support rod 7 of the emission system through the laser emission system mounting bracket 103. The dust-side power receiver 409 is fixed to the end of the dust-side receiver support rod 8. The laser emitting part of the laser emitter 101 faces the dust-side power receiver 409 below. The photovoltaic glass panel 410 to be tested is located between the laser emitter 101 and the dust-side power receiver 409. The dust-side power receiver 409 is connected to the signal collection and transmission module in the controller and transmits the collected signal to the signal collection and transmission module in the controller.

[0027] In this embodiment, the horizontal support rod 7 of the transmitting system and the dust-accumulated receiver support rod 8 are parallel to each other, and the main mounting rod 4 is provided with a handle 41. The handle 41 is provided with a laser emission switch connected to the laser transmitter 101, so as to perform handheld operation.

[0028] In this embodiment, the laser emitter 101 used is an 808nm wavelength laser emitter;

[0029] In this embodiment, the signal collection and transmission module is connected to a display screen and / or a database, and can display and / or store data.

[0030] In this embodiment, when the device is in operation, it is held or fixed near the photovoltaic glass panel under test, so that the original laser beam α emitted by the laser emitter 101 is as perpendicular as possible into the photovoltaic glass panel 410 under test. The laser emission switch is pressed to make the laser emitter 101 emit laser light, and then the signal collection and transmission module collects data.

[0031] like Figure 2 The undescribed parts of Example 2 shown are the same as those in Example 1;

[0032] The detector 1 also includes: a beam splitter 102, a clean photovoltaic glass panel 203, and a clean-side power receiver 204. The beam splitter 102 is installed inside the laser emission system mounting bracket 103 and is positioned between the laser emitting part of the laser emitter 101 and the dust-accumulated power receiver 409. The clean-side power receiver 204 is fixed in the middle of the main mounting rod 4 and faces the inclined surface of the beam splitter 102. The clean photovoltaic glass panel 203 is positioned between the clean-side power receiver 204 and the beam splitter 102 and is also installed inside the laser emission system mounting bracket 103. The clean-side power receiver 204 is also connected to the signal collection and transmission module.

[0033] In this embodiment, when the device in embodiment 2 is held or fixed near the photovoltaic glass panel to be tested, the angle is adjusted so that the original laser beam α emitted by the laser emitter 101 is as perpendicular as possible into the photovoltaic glass panel 410 to be tested. After the laser emission switch is pressed, a single collection command is sent.

[0034] The specific working process of a single collection command is as follows: the original laser beam α emitted by the 808nm laser emitter 101 is directed onto the beam splitter placed below. The beam splitter 102 then splits the incident light into two beams: a transmitted light γ and a reflected light β. The reflected light β is directed perpendicularly to the clean-side power receiver 204 and collected and converted into a clean electrical signal, which is then sent to the signal collection and transmission module in the controller. The transmitted light γ is directed perpendicularly to the photovoltaic glass panel 410 under test and collected by the dust-accumulated power receiver 409 below, which is then converted into a dust-accumulated electrical signal and sent to the signal collection and transmission module in the controller for display and / or storage in the database.

[0035] like Figure 3 and Figure 4 The undescribed parts of Example 3 shown are the same as those in Example 2;

[0036] like Figure 3The monitoring device shown also includes: a glass plate clamping device 5, a photovoltaic panel 2, a stepper motor 6, a detector clamp 9, and a controller integrating a signal collection and transmission module. The glass plate clamping device 5 is directly fixed to one side (any side, top, bottom, left, or right) of the photovoltaic panel 2. The photovoltaic glass panel 410 to be tested is installed in the glass plate clamping device 5. The housing of the stepper motor 6 is fixed to the glass plate clamping device 5 through a fixing bracket 3. The power output of the stepper motor 6 is fixed to the detector clamp 9, and the detector clamp 9 clamps the main mounting rod 4 of the detector 1.

[0037] In this embodiment, the photovoltaic glass panel 410 and the photovoltaic panel 2 are tilted at the same angle.

[0038] like Figure 5 The controller shown includes a laser emitting module, a signal collection and transmission module, and a result judgment module connected in sequence. The signal collection and transmission module is connected to the clean-side power receiver 204, the dust-side power receiver 409, the laser emitter 101, and the stepper motor 6.

[0039] The laser emission module receives the number of collections m from an external input and sends the number of collections m to the signal collection and transmission module. The signal collection and transmission module then sends m single-collection commands to the laser emitter 101, while simultaneously receiving clean electrical signals from the clean-side power receiver 204 and dust electrical signals from the dust-side power receiver 409. After each single-collection command, a single rotation command is sent to the stepper motor 6 to rotate the photovoltaic glass panel 410 under test (the rotation angle can be set via external input). After collecting m sets of electrical signals, the signal collection and transmission module sends them to the result judgment module. The result judgment module quickly calculates the average of the differences between the m sets of electrical signals and compares it with the previously measured relationship between the dust density and attenuation power of the photovoltaic glass panel stored in the result judgment module. This yields the dust accumulation state of the photovoltaic glass panel, and outputs either a high or low signal for direct judgment. By comparing the data from the laser emission m times, this controller can greatly reduce or even eliminate the influence of external factors other than the dust accumulation state on the measurement results, thus allowing direct output of results without manual judgment.

[0040] When this embodiment is in operation, it includes:

[0041] Step 1: First, clamp and fix the detector 1 to the detector holder 9;

[0042] Step 2: After installing the detector 1 on the detector holder 9, the signal collection and transmission module and the stepper motor 6 in the controller are connected through a plug-in interface or wireless connection. Then, the laser emission module is responsible for receiving the single collection count m input from the outside and sending the single collection count m to the signal collection and transmission module; that is, at this time, the controller activates the laser emission module, the signal collection and transmission module and the result judgment module and accepts the input single collection count m.

[0043] Step 3: Subsequently, the signal collection and transmission module sends m single collection commands to the laser emitter 101, and simultaneously receives the clean electrical signal from the clean-side power receiver 204 and the dust-accumulation electrical signal from the dust-accumulation power receiver 409; after each single collection command is sent, a single rotation command is sent to the stepper motor 6 to rotate the photovoltaic glass panel 410 under test (the rotation angle can be set by external input); that is, the signal collection and transmission module in the controller then performs m single collection commands and rotates the stepper motor 6 in two single collection commands;

[0044] Step 4: After the signal collection and transmission module collects m sets of electrical signals, it sends them to the result judgment module.

[0045] Step 5: The result judgment module quickly calculates the average difference within each of the m groups of electrical signals and compares it with the threshold value for the relationship between the dust density of the photovoltaic glass panel and the attenuation power previously measured in the laboratory and stored in the result judgment module. The average difference within each group is compared with the laboratory threshold value to obtain the dust accumulation state of the photovoltaic glass panel and output either a high or low signal to directly complete the judgment. This controller can greatly reduce or even eliminate the influence of external factors other than the dust accumulation state on the measurement results by comparing the data from the m laser emission, and therefore can directly output the results without manual judgment.

[0046] In this embodiment, the relationship threshold is determined by a combination of the beam splitter's splitting ratio and the required cleanliness of the photovoltaic panel surface. The laser power P on the dust-covered surface is determined when the dust density x is 0 g / m². T With clean surface laser power P R The power ratio x is the splitting ratio K. sr ;

[0047] As shown in Table 1 below, when the splitting ratio When the value is 0.56201, the laser power P of the clean surface R =0.75923W, at this time if the dust density is 0g / m², the laser power P on the dust accumulation surface is... T =0.42602W, laser power P on the dust accumulation surface T The formula for the relationship between ash density and ash accumulation is: When the dust density is 1 g / m², the laser power P on the dust accumulation surface is...T =0.414377044, a decrease of 0.011643W as a percentage of the cleanroom laser power P R 1.5335%, accounting for 0 g / m² of laser power P on the ash accumulation surface T 2.733%; when the dust density is 5g / m², the laser power P on the dust accumulation surface T =0.370901413W, a decrease of 0.055118587W, accounting for the laser power P of the clean surface. R 7.2598%, accounting for 7.2598% of the laser power P on the zero-time dust accumulation surface. T 12.9380%; when the dust density is 10g / m², the laser power P on the dust accumulation surface T =0.322914084W, a decrease of 0.103105916W, accounting for the laser power P of the clean surface. R 13.5803%, accounting for 0 g / m² of the laser power P on the ash accumulation surface T The ratio of laser power transmitted from the front to that reflected from the side decreased from 0.57 to 0.42, a decrease of 26.32%.

[0048] When the spectrophotometer ratio K sr When the value is 0.53044, the laser power P of the clean surface R =0.7915; At this time, when the dust density is 0 g / m², the laser power P on the dust accumulation surface is... T =0.42228W, laser power P on the dust accumulation surface T The formula for the relationship between ash density and ash accumulation is: When the dust density is 1 g / m², the laser power P on the dust accumulation surface is... T =0.409930897, a decrease of 0.012349W, accounting for the laser power P of the clean surface. R 1.5602%, accounting for 1.5602% of the laser power P on the zero-time dust accumulation surface. T 2.3244%; when the dust density is 5g / m², the laser power P on the dust accumulation surface T =0.364041765, a decrease of 0.058238235W, accounting for the laser power P of the clean surface. R 7.3580%, accounting for 7.3580% of the laser power P on the zero-time dust accumulation surface. T 13.7914%; when the dust density is 10g / m², the laser power P on the dust accumulation surface T =0.313835386W, a decrease of 0.108444614W, accounting for the laser power P of the clean surface. R 13.7012%, accounting for 0 g / m² of the laser power P on the ash accumulation surface. TThe ratio of laser power transmitted from the front to that reflected from the side decreased from 0.57 to 0.4, a decrease of 29.82%.

[0049] When the spectrophotometer ratio K sr When the value is 0.69671, the laser power P of the clean surface R =0.78988. At this point, when the dust density is 0 g / m², the laser power P on the dust accumulation surface is... T =0.55194W, laser power P on the dust accumulation surface T The formula for the relationship between ash density and ash accumulation is: When the dust density is 1 g / m², the laser power P on the dust accumulation surface is... T =0.538242577, a decrease of 0.013697W as a percentage of the cleanroom laser power P R 1.7341%, accounting for 1.7341% of the laser power P on the zero-time dust accumulation surface. T 2.4817%; when the dust density is 5g / m², the laser power P on the dust accumulation surface T =0.486768838W, a decrease of 0.065171162W, accounting for the laser power P of the clean surface. R 8.2508%, accounting for 0% of the laser power P on the dust accumulation surface at zero time. T 11.8077%; when the dust density is 10g / m², the laser power P on the dust accumulation surface T =0.429292861W, a decrease of 0.122647139W, accounting for the laser power P of the clean surface. R 15.5273%, accounting for 15.5273% of the laser power P on the zero-time dust accumulation surface. T The ratio of laser power transmitted from the front to that reflected from the side decreased from 0.7 to 0.55, a decrease of 8.57%.

[0050] Table 1. Effect of different beam splitters on laser power on the dust accumulation surface

[0051] <![CDATA[Splitting ratio K sr > <![CDATA[Laser power P of the dust-accumulating surface T > <![CDATA[n=P T / P R <!-- 5 -->]]> 0.56201 <![CDATA[P T =0.42602*exp(-0.02771*x)]]> n = 0.56201 * exp(-0.02790 * x) 0.53044 <![CDATA[P T =0.42228*exp(-0.02968*x)]]> n = 0.53044 * exp(-0.02885 * x) 0.69671 <![CDATA[P T =0.55194*exp(-0.02513*x)]]> n = 0.69671 * exp(-0.02475 * x)

[0052] Based on the experimental results obtained from all the beam splitters in this embodiment, at a splitting ratio of 0.53044, the ratio of front-transmitted laser power to side-reflected laser power varies more widely and has higher monitoring accuracy within a certain range of dust density. For information on dust density and collected laser power, please see [link to relevant documentation]. Figure 5 , Figure 5 In the middle (a), K is... sr The distribution of test results for laser power on clean surfaces (top dot) and on dusty surfaces (bottom triangle) when K = 0.56201 is shown in Figure (b). srThe distribution of test results for laser power on clean surfaces (top dot) and on dusty surfaces (bottom triangle) at K = 0.53044, (c) is the distribution of K. sr The distribution of test results for laser power on clean surfaces (top dot) and on dusty surfaces (bottom triangle) when the laser power is 0.69671.

[0053] In this embodiment, based on all data, the threshold for the laser power decrease ratio is set to 13%, which corresponds to a dust density of 10 g / m²; that is, in this embodiment (the beam splitter used has a splitting ratio of 0.53044), the threshold selected in the result judgment module (P) R -P T ) / P R =13% is the optimal cleaning time; the result judgment module compares the average difference between each group of electrical signals with this value and outputs two signals, high and low.

Claims

1. A photovoltaic module surface soiling state monitoring device based on spectral radiometric force collection, characterized by, The utility model relates to a kind of photovoltaic glass plate detection device, including: detector (1), glass plate clamping device (5), photovoltaic panel (2), stepper motor (6), detector holder (9) and controller integrated with signal collection and transfer module, wherein glass plate clamping device (5) is directly fixed on one side of photovoltaic panel (2), the photovoltaic glass plate (410) to be measured is installed in glass plate clamping device (5), the shell of stepper motor (6) is fixed with glass plate clamping device (5) by fixed support (3);The power output of stepper motor (6) is fixed with detector holder (9), and detector holder (9) clamps the main mounting rod (4) of detector (1); The detector (1) includes: laser emitter (101), laser emission system mounting bracket (103), photovoltaic glass plate (410) to be measured, main mounting rod (4), beam splitter (102), clean photovoltaic glass plate (203) and clean side power receiver (204), emission system horizontal support rod (7) and dust side receiver support rod (8) are fixed at the upper and lower ends of main mounting rod (4) respectively, laser emitter (101) is installed at the end of emission system horizontal support rod (7) by laser emission system mounting bracket (103), dust side power receiver (409) is fixed at the end of dust side receiver support rod (8), the laser emission part of laser emitter (101) is opposite to the dust side power receiver (409) below, and the photovoltaic glass plate (410) to be measured is located between laser emitter (101) and dust side power receiver (409);Dust side power receiver (409) is connected with signal collection and transfer module in controller;Beam splitter (102) is installed in laser emission system mounting bracket (103), and beam splitter (102) is arranged between the laser emission part of laser emitter (101) and dust side power receiver (409);Clean side power receiver (204) is fixed in the middle of main mounting rod (4), and is opposite to the inclined surface of beam splitter (102);Clean photovoltaic glass plate (203) is arranged between clean side power receiver (204) and beam splitter (102), and clean photovoltaic glass plate (203) is also installed in laser emission system mounting bracket (103);Clean side power receiver (204) is connected with signal collection and transfer module; The controller includes: laser emission module, signal collection and transfer module and result judgment module connected in sequence, wherein signal collection and transfer module is connected with clean side power receiver (204), dust side power receiver (409), laser emitter (101) and stepper motor (6) ​ The laser emission module is responsible for receiving the single set of collection times m of external input, and sending the single set of collection times m to the signal collection and forwarding module; then the signal collection and forwarding module sends the single collection instruction m times to the laser emitter (101), while receiving the clean electrical signal sent by the clean side power receiver (204) and the dust accumulation electrical signal sent by the dust accumulation side power receiver (409); after each single collection instruction is sent, a single rotation instruction is sent to the step motor (6) to make the measured photovoltaic glass plate (410) rotate; after the signal collection and forwarding module collects m sets of electrical signals, it is sent to the result judgment module; the result judgment module calculates the average of the difference of the m sets of electrical signals, and compares it with the relationship between the dust accumulation density and the decay power of the photovoltaic glass plate measured in the laboratory previously stored in the result judgment module; thus the dust accumulation state of the photovoltaic glass plate is obtained, and high or low signals are outputted, directly completing the judgment; The working process of the single collection instruction is as follows: the original laser beam emitted by the laser emitter (101) is incident on the below placed beam splitter, then the beam splitter (102) divides the incident light into two directions of transmission light and reflected light beam laser, wherein the reflected light is vertically incident on the clean side power receiver (204) and is collected and converted into a clean electrical signal to be sent to the signal collection and forwarding module in the controller, and the transmission light is vertically incident on the measured photovoltaic glass plate (410) and is collected and converted into a dust accumulation electrical signal by the below dust accumulation side power receiver (409) to be sent to the signal collection and forwarding module in the controller.

2. A photovoltaic module surface soiling state monitoring device based on spectral radiometric force acquisition according to claim 1, characterized in that, The laser emitter (101) is an 808nm waveband laser emitter.

3. The photovoltaic module soiling state monitoring device based on spectral radiance collection of claim 1, wherein, The main mounting rod (4) is provided with a handle (41).

4. The photovoltaic module surface soiling state monitoring device based on spectral radiance collection according to claim 3, characterized in that, The handle (41) is provided with a laser emission switch connected with the laser emitter (101).

5. The photovoltaic module surface soiling state monitoring device based on spectral radiance collection according to claim 1, characterized in that, The inclination angle of the measured photovoltaic glass plate (410) and the photovoltaic panel (2) is the same.

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