A method, device, equipment and medium for detecting front and back surfaces of photovoltaic glass

Abstract

The embodiment of the present invention discloses a front and back side detection method, device, equipment and medium of photovoltaic glass. The detection method firstly controls the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass within a target acquisition period, and receives the echo beam signal reflected by the photovoltaic glass; wherein the target acquisition period is the time range from the photovoltaic glass entering the preset detection area corresponding to the spectral confocal sensor to the photovoltaic glass moving out of the preset detection area corresponding to the spectral confocal sensor, and then converts the received multiple echo beam signals into the thickness data of the photovoltaic glass respectively, and finally determines whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass. The above method avoids the waste of the product quality of solar cells and even the scrapping of products and property losses caused by the wrong use of the front and back sides of the photovoltaic glass.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of industrial visual inspection technology, and in particular to a method, device, equipment and medium for inspecting the front and back sides of photovoltaic glass. Background Art

[0002] As a clean energy, solar power generation can achieve sustainable development of energy and environment. As a key component of photovoltaic power generation system, photovoltaic glass has been widely used in the manufacture of solar cells. Since photovoltaic glass needs to distinguish between the front and back sides (it can be understood that one side of photovoltaic glass is the smooth side and the other side of photovoltaic glass is the velvet side. The purpose of the velvet side is to reduce the reflection of light by solar cells, thereby increasing the photoelectric conversion efficiency of solar cells), in the deep processing production process, if the front and back sides of photovoltaic glass are used incorrectly, it will seriously affect the product quality of solar cells, and even these solar cells will be scrapped, which is a serious defect and will cause unnecessary property losses.

[0003] At present, the current manufacturers mainly rely on manual visual or tactile inspection for the front and back sides of photovoltaic glass. There are problems such as being greatly affected by subjective factors, low inspection efficiency, high false detection rate / missed detection rate, high cost, inability to link with production line equipment (inspection equipment, robots, etc.), and difficulty in data statistics. In addition, the method cannot promptly adapt to the corresponding changes when different manufacturers switch to different specifications in terms of embossing type, silk screen pattern, coating process, glass thickness, etc. Summary of the invention

[0004] The embodiments of the present invention provide a method, device, equipment and medium for detecting the front and back sides of photovoltaic glass. Based on the signal transmission and reception of the spectral confocal sensor, the front and back sides of the surface of the photovoltaic glass facing the spectral confocal sensor are distinguished, thereby effectively improving the production quality and efficiency.

[0005] In a first aspect, an embodiment of the present invention provides a method for detecting the front and back surfaces of photovoltaic glass, comprising:

[0006] During a target acquisition period, the spectral confocal sensor is controlled to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass; wherein the target acquisition period is a time range from when the photovoltaic glass enters a preset detection area corresponding to the spectral confocal sensor to when the photovoltaic glass moves to leave the preset detection area corresponding to the spectral confocal sensor;

[0007] Convert the received multiple echo beam signals into thickness data of the photovoltaic glass respectively;

[0008] According to the thickness data of the photovoltaic glass, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface.

[0009] Optionally, determining, according to the thickness data of the photovoltaic glass, whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface comprises:

[0010] According to the values ​​of the thickness data of the photovoltaic glass, the plurality of thickness data of the photovoltaic glass are correspondingly divided into a valid data group and an empty data group;

[0011] According to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, it is determined whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface.

[0012] Optionally, determining whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group comprises:

[0013] The ratio of the number of the thickness data of the photovoltaic glass in the valid data group to the total number of the thickness data of the photovoltaic glass is defined as a first duty cycle;

[0014] When the first duty cycle is greater than or equal to a first preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface;

[0015] When the first duty cycle is less than the first preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

[0016] Optionally, determining whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group comprises:

[0017] defining a ratio of the number of the photovoltaic glass thickness data in the empty data group to the total number of the photovoltaic glass thickness data as a second duty cycle;

[0018] When the second duty cycle is less than a second preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface;

[0019] When the second duty cycle is greater than or equal to the second preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

[0020] Optionally, converting the received multiple echo beam signals into thickness data of the photovoltaic glass respectively includes:

[0021] When the signal strength of the echo light beam signal is less than a third preset threshold, the converted thickness data of the photovoltaic glass is empty data.

[0022] Optionally, during the target acquisition period, after timing controlling the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receiving an echo beam signal reflected by the photovoltaic glass, the method further includes:

[0023] Respectively acquiring peak data of spectral sub-peaks corresponding to a plurality of the echo beam signals, and defining a third duty cycle as a ratio of the number of the echo beam signals corresponding to which the peak data of the spectral sub-peaks is greater than or equal to a fourth preset threshold to the total number of the echo beam signals;

[0024] When the third duty cycle is greater than or equal to a fifth preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface;

[0025] When the third duty cycle is less than the fifth preset threshold, it is determined that the surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

[0026] Optionally, during the target acquisition period, after timing controlling the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receiving an echo beam signal reflected by the photovoltaic glass, the method further includes:

[0027] Respectively acquiring light intensity data corresponding to a plurality of the echo light beam signals, and defining a ratio of the number of the echo light beam signals corresponding to the light intensity data being greater than or equal to a sixth preset threshold to the total number of the echo light beam signals as a fourth duty cycle;

[0028] When the fourth duty cycle is greater than or equal to a seventh preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface;

[0029] When the fourth duty cycle is less than the seventh preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

[0030] In a second aspect, an embodiment of the present invention further provides a front and back surface detection device for photovoltaic glass, comprising:

[0031] A signal acquisition module is used to control the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass during a target acquisition period; wherein the target acquisition period is the time range from when the photovoltaic glass enters a preset detection area corresponding to the spectral confocal sensor to when the photovoltaic glass moves out of the preset detection area corresponding to the spectral confocal sensor;

[0032] A data conversion module, used for converting the received multiple echo beam signals into thickness data of the photovoltaic glass respectively;

[0033] The front and back determination module is used to determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass.

[0034] In a third aspect, an embodiment of the present invention further provides a terminal device, including:

[0035] one or more processors;

[0036] A storage device for storing one or more programs;

[0037] When the one or more programs are executed by the one or more processors, the one or more processors implement the front and back surface detection method of photovoltaic glass as described in any one of the first aspects.

[0038] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for detecting the front and back surfaces of photovoltaic glass as described in any one of the first aspects.

[0039] The embodiments of the present invention provide a front and back side detection method, device, equipment and medium for photovoltaic glass. The detection method firstly controls the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass within a target acquisition period, and receives an echo beam signal reflected by the photovoltaic glass; wherein the target acquisition period is the time range from the photovoltaic glass entering a preset detection area corresponding to the spectral confocal sensor to the photovoltaic glass moving out of the preset detection area corresponding to the spectral confocal sensor, and then converts the received multiple echo beam signals into the thickness data of the photovoltaic glass respectively, and finally determines whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass. By using the above method, based on the signal emission and reception of the spectral confocal sensor, the corresponding conversion is made into the thickness data of the detected photovoltaic glass, so as to quickly, accurately and efficiently distinguish the front and back of the surface of the photovoltaic glass facing the spectral confocal sensor. Photovoltaic glass of various specifications can be covered, and the complete detection process applicable to various detection subdivision scenarios is adopted. According to the changes caused by different specifications, a non-contact and unified detection method is adopted to ensure the detection consistency, which effectively improves the production quality and production efficiency, improves the reliability and stability of the front and back detection of photovoltaic glass, avoids the waste such as affecting the product quality of solar cells and even causing product scrapping and property loss due to the incorrect use of the front and back of photovoltaic glass, and solves the problems brought by manual detection, such as being greatly affected by subjective factors, low detection efficiency, high false detection rate / missed detection rate, and high cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a schematic flow chart of a method for detecting the front and back surfaces of photovoltaic glass provided by an embodiment of the present invention;

[0042] Figure 2 It is a schematic diagram of light path propagation of a photovoltaic glass provided by an embodiment of the present invention, in which a surface on one side facing a spectral confocal sensor is a light surface;

[0043] Figure 3 It is a schematic diagram of light path propagation of a photovoltaic glass provided by an embodiment of the present invention, wherein the surface of one side facing the spectral confocal sensor is a velvet surface;

[0044] Figure 4 It is a schematic flow chart of another method for detecting the front and back surfaces of photovoltaic glass provided by an embodiment of the present invention;

[0045] Figure 5 It is a schematic diagram of a spectral sub-peak provided by an embodiment of the present invention, in which a surface of a photovoltaic glass facing a spectral confocal sensor is a light surface;

[0046] Figure 6 It is a schematic diagram of a spectral sub-peak provided by an embodiment of the present invention, in which a photovoltaic glass has a velvet surface on one side facing a spectral confocal sensor;

[0047] Figure 7 It is a structural schematic diagram of a front and back surface detection device of photovoltaic glass provided by an embodiment of the present invention;

[0048] Figure 8 It is a structural diagram of a terminal device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0050] Figure 1 This is a schematic flow chart of a method for detecting the front and back sides of a photovoltaic glass provided by an embodiment of the present invention. The method for detecting the front and back sides of the photovoltaic glass can be applied to the production process before the photovoltaic glass is assembled into a solar cell. The method for detecting the front and back sides of the photovoltaic glass can be performed by a device for detecting the front and back sides of the photovoltaic glass. The device can be implemented in the form of hardware and / or software, and the device can be configured in a control panel. Figure 1 As shown, the front and back detection method includes:

[0051] S110. During a target acquisition period, the spectral confocal sensor is controlled to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass. The target acquisition period is the time range from when the photovoltaic glass enters a preset detection area corresponding to the spectral confocal sensor to when the photovoltaic glass moves out of the preset detection area corresponding to the spectral confocal sensor.

[0052] First of all, it should be noted that the photovoltaic glass includes a front side and a back side that are opposite to each other and need to be distinguished. The surface roughness of the front side and the back side is different. For example, the front side of the photovoltaic glass can be a smooth surface, and the back side of the photovoltaic glass can be a velvet surface (velvet surface can also be understood as a non-glossy surface), or, for example, the front side of the photovoltaic glass can be a velvet surface, and the back side of the photovoltaic glass can be a smooth surface. It can be understood that the smooth surface and velvet surface discussed in this embodiment are two relative concepts. The side surface with a smaller roughness on the front and back sides of the photovoltaic glass can be understood as a smooth surface, and the side surface with a larger roughness on the front and back sides of the photovoltaic glass can be understood as a velvet surface. The purpose of the velvet surface is to reduce the reflection of light by solar cells, thereby increasing the photoelectric conversion efficiency of solar cells. For example, the velvet surface can include an embossed pattern (cloth pattern, hexagon), a silk screen pattern (black glaze, white glaze), laser drilling, etc., and the side surface formed with an embossed pattern can also be understood as an embossed surface, which is formed by a calender roller on the surface of the photovoltaic glass. Specific textures and patterns are formed to change the reflection characteristics of light. For example, the light surface may include a coating layer, etc., which is a coating process to increase transmittance and reduce reflection, so as to have a more obvious mirror reflection characteristic. In addition, for example, photovoltaic glass can be divided into two types: front glass and back glass according to its installation position, among which the front glass can maximize the use of transmitted light, and the back glass can carry and protect the solar cells and reflect the unabsorbed light.

[0053] Figure 2 FIG. 1 is a schematic diagram of light path propagation of a photovoltaic glass provided by an embodiment of the present invention, wherein the surface of one side facing the spectral confocal sensor is a light surface. Figure 2 As shown, the photovoltaic glass includes upper surfaces that are separated from each other (the upper surface can be understood as a side surface of the photovoltaic glass facing the spectral confocal sensor, at this time Figure 2 The light side is shown) and the lower surface (the lower surface can be understood as the side surface of the photovoltaic glass away from the spectral confocal sensor. Figure 2 The velvet surface is shown. If incident light is incident on the upper surface (i.e., the glossy surface), the generated reflected light can be reflected back along the original path, and the difference in signal intensity between the incident light beam and the reflected light beam is small. Figure 3 FIG. 1 is a schematic diagram of light path propagation of a photovoltaic glass provided by an embodiment of the present invention, wherein the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface. Figure 3 As shown, the photovoltaic glass includes upper surfaces that are separated from each other (the upper surface can be understood as a side surface of the photovoltaic glass facing the spectral confocal sensor, at this time Figure 3 The velvet surface is shown) and the lower surface (the lower surface can be understood as the side surface of the photovoltaic glass away from the spectral confocal sensor. Figure 3The upper surface (shown as the smooth surface) is the same as the upper surface (the velvet surface). If incident light is incident on the upper surface (i.e., the velvet surface), the reflected light generated cannot be reflected back along the original path, and the signal intensity of the incident light beam and the reflected light beam differ greatly. In this way, the reflection characteristics generated are different according to the different roughness of the front and back surfaces of the photovoltaic glass, so as to facilitate the subsequent detection of the specific surface shape of the front and back surfaces of the photovoltaic glass.

[0054] Specifically, in the detection process of the front and back sides of the photovoltaic glass in this embodiment, the photovoltaic glass to be detected can be placed on the assembly line, the photovoltaic glass to be detected can move with the assembly line, and the spectral confocal sensor is placed directly above the assembly line, and the height position and horizontal position of the spectral confocal sensor are appropriately adjusted accordingly. The spectral confocal sensor can emit a detection beam signal to the photovoltaic glass to be detected on the assembly line, and a small light spot can be observed on the surface of the photovoltaic glass, so that the subsequent detection can be used to obtain that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface. Further, in order to effectively improve the detection accuracy of the front and back sides of the photovoltaic glass, and the photovoltaic glass to be detected moves with the assembly line, the spectral confocal sensor can be set to perform a detection process with a corresponding photovoltaic glass to be detected. That is, within the time range from the photovoltaic glass entering the preset detection area corresponding to the spectral confocal sensor to the photovoltaic glass moving out of the preset detection area corresponding to the spectral confocal sensor, that is, within the target acquisition cycle, it means that the spectral confocal sensor can perform a detection process on a complete photovoltaic glass to be detected. During the target acquisition cycle, the spectral confocal sensor can be controlled to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass. That is, for any photovoltaic glass to be detected, the spectral confocal sensor needs to emit a detection beam signal toward the photovoltaic glass to be detected multiple times. For example, by setting a suitable timing control frequency, it is possible to prevent the burden of too many signal acquisitions on the subsequent analysis and processing process, and to avoid the inaccurate accuracy caused by too few signal acquisitions on the subsequent analysis and processing process. During the time outside the target acquisition cycle, the spectral confocal sensor can be controlled to sleep to save energy, indicating that the photovoltaic glass to be detected moves with the assembly line at this time and has not yet moved to the preset detection area corresponding to the spectral confocal sensor. At this time, if the spectral confocal sensor is still used to generate a detection beam signal, the corresponding signal acquisition result may have a large deviation, thereby affecting the subsequent analysis results of the specific surface shape of the front and back sides of the photovoltaic glass.

[0055] S120, converting the received multiple echo beam signals into thickness data of the photovoltaic glass respectively.

[0056] It can be understood that, within the target acquisition period, the spectral confocal sensor can intermittently emit multiple detection beam signals toward the photovoltaic glass, and correspondingly receive the echo beam signal reflected by the photovoltaic glass. Of course, the number of echo beam signals is also multiple. The received multiple echo beam signals can be converted into the thickness data of the photovoltaic glass respectively, and the thickness measurement mode of the spectral confocal sensor is used to facilitate the subsequent specific analysis of the thickness data of the photovoltaic glass obtained by the conversion, so as to determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface. In addition, it should be noted that after the spectral confocal sensor emits the detection beam signal toward the photovoltaic glass, the spectral confocal sensor can receive the echo beam signal accordingly, and the received echo beam signal can be converted into the thickness data of the photovoltaic glass, and the thickness data of the photovoltaic glass is specific data / specific value / valid data / valid value, and after the spectral confocal sensor emits the detection beam signal toward the photovoltaic glass, the spectral confocal sensor does not actually receive the corresponding echo beam signal, then it can be understood that the thickness data of the photovoltaic glass obtained by converting the echo beam signal corresponding to the spectral confocal sensor is empty data / empty value.

[0057] S130. Determine, based on the thickness data of the photovoltaic glass, whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface.

[0058] Specifically, the thickness data of the photovoltaic glass obtained by the conversion when the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface is different from the thickness data of the photovoltaic glass obtained by the conversion when the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface. According to these differences, the present embodiment can determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface. Exemplarily, when the smooth surface of the photovoltaic glass faces upward, that is, when the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface, the thickness data of the photovoltaic glass can be converted and obtained, and the specific data / specific values / valid data / valid values ​​are more, and the empty data / empty values ​​are less. When the velvet surface of the photovoltaic glass is facing upwards, that is, when the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface, the thickness data of the photovoltaic glass can also be converted at this time, and the specific data / specific value / valid data / valid value in the thickness data of the photovoltaic glass is less, and the empty data / empty value is more, or it can be understood that the thickness data of the photovoltaic glass cannot be converted at this time, because the detection beam signal emitted by the spectral confocal sensor cannot pass through the velvet surface of the photovoltaic glass, and a characteristic of an effective thickness value cannot be obtained. In this way, this embodiment can distinguish the front and back sides of the photovoltaic glass based on the number of valid data and empty data corresponding to the thickness data of the side surface of the photovoltaic glass facing the spectral confocal sensor as a light surface or a velvet surface. In addition, this embodiment collects specific data (thickness data) based on the spectral confocal sensor, and designs an efficient and accurate data processing algorithm, significantly reduces the probability of false alarms, and analyzes the upper surface state of the photovoltaic glass to distinguish the front and back sides of the photovoltaic glass, that is, to distinguish the light surface or the velvet surface of the photovoltaic glass, which is conducive to the detection of the front and back sides of the photovoltaic glass in multiple scenes and specifications.

[0059] In addition, if what is required is that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface, that is, the upper surface of the photovoltaic glass is a smooth surface, that is, the light surface of the photovoltaic glass faces upward, after determining that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface, the assembly line continues to run, and the photovoltaic glass can be sent to the next process. After determining that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface, a reminder signal can be sent through an audible and visual alarm device to remind relevant staff that the front and back sides of the photovoltaic glass are wrong. The assembly line can send the photovoltaic glass to the position corresponding to the defective material, and finally after manual processing (changing the front and back sides of the photovoltaic glass so that the light surface of the photovoltaic glass faces upward), it is sent to the next process through the assembly line. Similarly, if what is required is that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface, the same judgment and operation can be performed, which effectively avoids the problem of low production quality of the solar cells prepared subsequently.

[0060] The technical solution in the embodiment of the present invention is based on the signal emission and reception of the spectral confocal sensor, and the corresponding conversion is into the thickness data of the detected photovoltaic glass, so as to quickly, accurately and efficiently distinguish the front and back of the surface of the photovoltaic glass facing the spectral confocal sensor. It can cover photovoltaic glass of various specifications and is suitable for the complete detection process of various detection subdivision scenarios. In view of the changes caused by different specifications, a non-contact and unified detection method is adopted to ensure the detection consistency, which effectively improves the production quality and production efficiency, and improves the reliability and stability of the front and back detection of photovoltaic glass, avoids the waste of product quality of solar cells and even product scrapping, property loss and other wastes caused by the incorrect use of the front and back of photovoltaic glass, and solves the problems brought by manual detection, such as large influence of subjective factors, low detection efficiency, high false detection rate / missed detection rate, and high cost.

[0061] Figure 4 1 is a flow chart of another method for detecting the front and back sides of photovoltaic glass provided by an embodiment of the present invention. This embodiment is optimized on the basis of the above embodiment. Optionally, according to the thickness data of the photovoltaic glass, determining whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface includes:

[0062] According to the values ​​of the thickness data of the photovoltaic glass, the thickness data of the plurality of photovoltaic glasses are divided into a valid data group and an empty data group;

[0063] According to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, it is determined whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface.

[0064] For details not yet provided in this embodiment, please refer to the above embodiments. Figure 4 As shown, the front and back detection method includes:

[0065] S210. During a target acquisition period, the spectral confocal sensor is controlled to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass. The target acquisition period is the time range from when the photovoltaic glass enters a preset detection area corresponding to the spectral confocal sensor to when the photovoltaic glass moves out of the preset detection area corresponding to the spectral confocal sensor.

[0066] S220, converting the received multiple echo beam signals into thickness data of the photovoltaic glass respectively.

[0067] S230. According to the values ​​of the thickness data of the photovoltaic glass, the thickness data of the plurality of photovoltaic glasses are divided into a valid data group and an empty data group.

[0068] Specifically, after the spectral confocal sensor emits a detection beam signal toward the photovoltaic glass, the spectral confocal sensor can receive the corresponding echo beam signal. At this time, the thickness data of the photovoltaic glass obtained by converting the echo beam signal is specific data / specific value / valid data / valid value, and the thickness data of the photovoltaic glass can be divided into a valid data group. After the spectral confocal sensor emits a detection beam signal toward the photovoltaic glass, the spectral confocal sensor does not actually receive the corresponding echo beam signal. It can be understood that the thickness data of the photovoltaic glass obtained by converting the echo beam signal corresponding to the spectral confocal sensor is empty data / empty value, and the thickness data of the photovoltaic glass can be divided into an empty data group.

[0069] S240: Determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group.

[0070] In a specific embodiment, the surface of the photovoltaic glass facing the spectral confocal sensor may be determined as a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group. That is, optionally, the surface of the photovoltaic glass facing the spectral confocal sensor may be determined as a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, including: defining the ratio of the number of the thickness data of the photovoltaic glass in the valid data group to the total number of the thickness data of the photovoltaic glass as a first duty cycle; when the first duty cycle is greater than or equal to the first preset threshold, determining that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface; when the first duty cycle is less than the first preset threshold, determining that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface.

[0071] Specifically, the first preset threshold can be set according to the actual situation of the production line. The setting of the first preset threshold is conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The specific value of the first preset threshold can be reasonably set to magnify the difference between the light surface and the velvet surface of the photovoltaic glass, which is more conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The first preset threshold is compared with the size of the first duty cycle. When the first duty cycle is greater than or equal to the first preset threshold, it means that the number of thickness data of the photovoltaic glass in the valid data group accounts for the majority of the total number of thickness data of the photovoltaic glass. The more specific data / specific value / valid data / valid value in the thickness data of the photovoltaic glass, the more the surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the light surface. When the first duty cycle is less than the first preset threshold, it means that the number of thickness data of the photovoltaic glass in the valid data group accounts for a smaller number of the total number of thickness data of the photovoltaic glass. The less specific data / specific value / valid data / valid value in the thickness data of the photovoltaic glass is, the surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the velvet surface.

[0072] In addition, optionally, based on the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, it is determined that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a smooth surface or a velvet surface, including: defining the ratio of the number of thickness data of the photovoltaic glass in the valid data group to the total number of thickness data of the photovoltaic glass as a first duty cycle; when the first duty cycle is greater than the upper limit value of the first preset range, determining that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a smooth surface; when the first duty cycle satisfies the first preset range, determining that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a velvet surface including an embossed pattern and a silk-screen pattern; when the first duty cycle is less than the lower limit value of the first preset range, determining that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a velvet surface including an embossed pattern.

[0073] Specifically, for example, the velvet surface including the embossed pattern and the silk-screen pattern can be understood as the surface type of one side surface of the back panel glass, and the velvet surface including the embossed pattern can be understood as the surface type of one side surface of the front panel glass. In this way, the present embodiment can further distinguish that the photovoltaic glass is specifically the front panel glass or the back panel glass, and distinguish the front and back sides of the front panel glass and the front and back sides of the back panel glass.

[0074] In another specific embodiment, the side surface of the photovoltaic glass facing the spectral confocal sensor can be determined as a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the empty data group. That is, optionally, according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, the side surface of the photovoltaic glass facing the spectral confocal sensor is determined to be a smooth surface or a velvet surface, including: defining the ratio of the number of thickness data of the photovoltaic glass in the empty data group to the total number of thickness data of the photovoltaic glass as a second duty cycle; when the second duty cycle is less than the second preset threshold, determining that the side surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface; when the second duty cycle is greater than or equal to the second preset threshold, determining that the side surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface.

[0075] Specifically, the second preset threshold can be set according to the actual situation of the production line. The setting of the second preset threshold is conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The specific value of the second preset threshold can be reasonably set to magnify the difference between the light surface and the velvet surface of the photovoltaic glass, which is more conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The second preset threshold is compared with the size of the second duty cycle. When the second duty cycle is less than the second preset threshold, it means that the number of thickness data of the photovoltaic glass in the empty data group accounts for a small number of the total number of thickness data of the photovoltaic glass. The fewer the empty data / empty values ​​in the thickness data of the photovoltaic glass, the side surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the light surface. When the second duty cycle is greater than or equal to the second preset threshold, it means that the number of thickness data of the photovoltaic glass in the empty data group accounts for the majority of the total number of thickness data of the photovoltaic glass. The more empty data / empty values ​​in the thickness data of the photovoltaic glass, the side surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the velvet surface.

[0076] In addition, optionally, based on the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, it is determined that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a smooth surface or a velvet surface, including: defining the ratio of the number of thickness data of the photovoltaic glass in the empty data group to the total number of thickness data of the photovoltaic glass as a second duty cycle; when the second duty cycle is greater than the upper limit value of the second preset range, determining that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a velvet surface including an embossed pattern; when the second duty cycle satisfies the second preset range, determining that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a velvet surface including an embossed pattern and a silk-screen pattern; when the second duty cycle is less than the lower limit value of the second preset range, determining that the surface of the photovoltaic glass on the side facing the spectral confocal sensor is a smooth surface.

[0077] Specifically, for example, the velvet surface including the embossed pattern and the silk-screen pattern can be understood as the surface type of one side surface of the back panel glass, and the velvet surface including the embossed pattern can be understood as the surface type of one side surface of the front panel glass. In this way, the present embodiment can further distinguish that the photovoltaic glass is specifically the front panel glass or the back panel glass, and distinguish the front and back sides of the front panel glass and the front and back sides of the back panel glass.

[0078] On this basis, optionally, the received multiple echo beam signals are respectively converted into thickness data of the photovoltaic glass, including: when the signal strength of the echo beam signal is less than a third preset threshold, the converted thickness data of the photovoltaic glass is empty data.

[0079] Specifically, in the present embodiment, in the process of converting the echo beam signal into the thickness data of the photovoltaic glass, the signal strength of the echo beam signal is preliminarily screened, and the difference in the thickness data of the photovoltaic glass corresponding to the light surface and the velvet surface of the photovoltaic glass is further widened. That is, by reasonably setting the third preset threshold, when the signal strength of the echo beam signal is less than the third preset threshold, it means that the signal strength of the echo beam signal is small, and the thickness data of the photovoltaic glass converted by the echo beam signal is specific data / specific value / valid data / valid value, but these smaller specific data may interfere with the subsequent judgment result of whether the surface of the photovoltaic glass facing the spectral confocal sensor is a light surface or a velvet surface, and the thickness data of the photovoltaic glass obtained by the conversion can be empty data. In this way, the detection accuracy of whether the surface of the photovoltaic glass facing the spectral confocal sensor is a light surface or a velvet surface is effectively improved.

[0080] In another specific embodiment, this embodiment does not need to convert the received multiple echo beam signals into the thickness data of the photovoltaic glass respectively, and then detect and judge the front and back sides of the photovoltaic glass, but directly analyzes the received multiple echo beam signals. Optionally, within the target acquisition period, the spectral confocal sensor is controlled to emit a detection beam signal toward the photovoltaic glass, and after receiving the echo beam signal reflected by the photovoltaic glass, it also includes: respectively obtaining the peak value data of the spectral sub-peaks corresponding to the multiple echo beam signals, and defining the ratio of the number of echo beam signals corresponding to the fourth preset threshold value and the total number of echo beam signals when the peak value data of the spectral sub-peaks is greater than or equal to the fourth preset threshold value as the third duty cycle; when the third duty cycle is greater than or equal to the fifth preset threshold value, it is determined that the side surface of the photovoltaic glass facing the spectral confocal sensor is a light surface; when the third duty cycle is less than the fifth preset threshold value, it is determined that the side surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface.

[0081] Specifically, after receiving multiple echo beam signals, the peak data of the spectral sub-peaks corresponding to the multiple echo beam signals can be respectively obtained, and based on the result of comparing the peak data of the spectral sub-peaks with the fourth preset threshold, the multiple echo beam signals can be divided into a first group and a second group, wherein the peak data of the spectral sub-peaks corresponding to the echo beam signals in the first group is greater than or equal to the fourth preset threshold, and the peak data of the spectral sub-peaks corresponding to the echo beam signals in the second group is less than the fourth preset threshold. The fourth preset threshold can be set according to the actual situation of the signal strength of the echo beam signal, and the specific value of the fourth preset threshold can be reasonably set to magnify the difference between the glossy surface or the velvet surface of the photovoltaic glass, which is more conducive to the correct distinction between the front and back sides of the photovoltaic glass. By way of example, Figure 5 1 is a schematic diagram of a spectral sub-peak in which a photovoltaic glass surface facing a spectral confocal sensor is a light surface provided by an embodiment of the present invention. Figure 6 is a schematic diagram of a spectral sub-peak provided by an embodiment of the present invention, wherein the surface of a photovoltaic glass facing the spectral confocal sensor is a velvet surface, such as Figure 5 and Figure 6 As shown, it can be clearly seen that when the upper surface of the photovoltaic glass is a smooth surface, the corresponding spectral sub-peak data has a larger value (greater than the fourth preset threshold), and when the upper surface of the photovoltaic glass is a velvet surface, the corresponding spectral sub-peak data has a smaller value (less than the fourth preset threshold). Afterwards, the ratio of the number of peak data of spectral sub-peaks corresponding to the echo beam signal in the first group to the total number of peak data of spectral sub-peaks corresponding to the echo beam signal can be defined as the third duty cycle.

[0082] The fifth preset threshold can be set according to the actual situation of the production line. The setting of the fifth preset threshold is conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The specific value of the fifth preset threshold can be reasonably set to magnify the difference between the light surface and the velvet surface of the photovoltaic glass, which is more conducive to correctly distinguishing the front and back sides of the photovoltaic glass. Comparing the third duty cycle with the fifth preset threshold, when the third duty cycle is greater than or equal to the fifth preset threshold, it means that the number of peak data of the spectral sub-peaks corresponding to the echo beam signal in the first group accounts for the majority of the total number of peak data of the spectral sub-peaks corresponding to the echo beam signal. The more the peak data of the spectral sub-peaks corresponding to the echo beam signal is greater than or equal to the fourth preset threshold, the more the surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the light surface. When the third duty cycle is less than the fifth preset threshold, it means that the number of peak data of spectral sub-peaks corresponding to the echo beam signal in the first group accounts for a smaller number of the total number of peak data of spectral sub-peaks corresponding to the echo beam signal. The smaller the number of peak data of spectral sub-peaks corresponding to the echo beam signal is greater than or equal to the fourth preset threshold, the surface of the photovoltaic glass facing the spectral confocal sensor can be determined as velvet.

[0083] In another specific embodiment, this embodiment does not need to convert the received multiple echo beam signals into the thickness data of the photovoltaic glass respectively, and then detect and judge the front and back sides of the photovoltaic glass, but directly analyzes the received multiple echo beam signals. Optionally, within the target acquisition period, the spectral confocal sensor is controlled to emit a detection beam signal toward the photovoltaic glass, and after receiving the echo beam signal reflected by the photovoltaic glass, it also includes: respectively obtaining the light intensity data corresponding to the multiple echo beam signals, and defining the ratio of the number of echo beam signals corresponding to the light intensity data greater than or equal to the sixth preset threshold to the total number of echo beam signals as the fourth duty cycle; when the fourth duty cycle is greater than or equal to the seventh preset threshold, determining that the side surface of the photovoltaic glass facing the spectral confocal sensor is a light surface; when the fourth duty cycle is less than the seventh preset threshold, determining that the side surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface.

[0084] Specifically, after receiving multiple echo beam signals, the light intensity data corresponding to the multiple echo beam signals can be obtained respectively, and the multiple echo beam signals can be divided into a third group and a fourth group according to the result of comparing the light intensity data with the sixth preset threshold, wherein the light intensity data corresponding to the echo beam signals in the third group is greater than or equal to the sixth preset threshold, and the light intensity data corresponding to the echo beam signals in the fourth group is less than the sixth preset threshold. The sixth preset threshold can be set according to the actual situation of the signal strength of the echo beam signal, and the specific value of the sixth preset threshold can be reasonably set to magnify the difference between the glossy surface or the velvet surface of the photovoltaic glass, which is more conducive to the correct distinction between the front and back sides of the photovoltaic glass. Afterwards, the ratio of the number of light intensity data corresponding to the echo beam signals in the third group to the total number of light intensity data corresponding to the echo beam signals can be defined as the fourth duty cycle.

[0085] The seventh preset threshold can be set according to the actual situation of the production line. The setting of the seventh preset threshold is conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The specific value of the seventh preset threshold can be reasonably set to magnify the difference between the light surface and the velvet surface of the photovoltaic glass, which is more conducive to correctly distinguishing the front and back sides of the photovoltaic glass. The fourth duty cycle is compared with the seventh preset threshold. When the fourth duty cycle is greater than or equal to the seventh preset threshold, it means that the number of light intensity data corresponding to the echo beam signal in the third group accounts for the majority of the total number of light intensity data corresponding to the echo beam signal. The more the number of light intensity data corresponding to the echo beam signal is greater than or equal to the sixth preset threshold, the side surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the light surface. When the fourth duty cycle is less than the seventh preset threshold, it means that the number of light intensity data corresponding to the echo beam signal in the third group accounts for a smaller number of the total number of light intensity data corresponding to the echo beam signal. The fewer the number of light intensity data corresponding to the echo beam signal is greater than or equal to the sixth preset threshold, the side surface of the photovoltaic glass facing the spectral confocal sensor can be determined as the velvet surface.

[0086] Figure 7 The front and back detection device of a photovoltaic glass provided by an embodiment of the present invention is a schematic diagram of the structure. The front and back detection device of the photovoltaic glass can be applied to the production process before the photovoltaic glass is assembled into a solar cell. The front and back detection device can be implemented in the form of hardware and / or software and is generally configured in a control panel. Figure 7 As shown, the front and back detection device includes:

[0087] The signal acquisition module 310 is used to control the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receive the echo beam signal reflected by the photovoltaic glass during a target acquisition period; wherein the target acquisition period is the time range from the photovoltaic glass entering the preset detection area corresponding to the spectral confocal sensor to the photovoltaic glass moving out of the preset detection area corresponding to the spectral confocal sensor; the data conversion module 320 is used to convert the received multiple echo beam signals into the thickness data of the photovoltaic glass respectively; the positive and negative determination module 330 is used to determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is smooth or velvety according to the thickness data of the photovoltaic glass.

[0088] The technical solution in the embodiment of the present invention is that the detection method firstly controls the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass within a target acquisition period, and receives an echo beam signal reflected by the photovoltaic glass; wherein the target acquisition period is the time range from the photovoltaic glass entering the preset detection area corresponding to the spectral confocal sensor to the photovoltaic glass moving out of the preset detection area corresponding to the spectral confocal sensor, and then converts the received multiple echo beam signals into the thickness data of the photovoltaic glass respectively, and finally determines whether the surface of the photovoltaic glass facing the spectral confocal sensor is smooth or velvety according to the thickness data of the photovoltaic glass. By using the above method, based on the signal emission and reception of the spectral confocal sensor, the corresponding conversion is made into the thickness data of the detected photovoltaic glass, so as to quickly, accurately and efficiently distinguish the front and back of the surface of the photovoltaic glass facing the spectral confocal sensor. Photovoltaic glass of various specifications can be covered, and the complete detection process applicable to various detection subdivision scenarios is adopted. According to the changes caused by different specifications, a non-contact and unified detection method is adopted to ensure the detection consistency, which effectively improves the production quality and production efficiency, improves the reliability and stability of the front and back detection of photovoltaic glass, avoids the waste such as affecting the product quality of solar cells and even causing product scrapping and property loss due to the incorrect use of the front and back of photovoltaic glass, and solves the problems brought by manual detection, such as being greatly affected by subjective factors, low detection efficiency, high false detection rate / missed detection rate, and high cost.

[0089] Based on the above technical solution, optionally, the positive and negative determination module 330 may specifically include a data division unit and a positive and negative determination unit. The data division unit is used to divide the thickness data of multiple photovoltaic glasses into valid data groups and empty data groups according to the values ​​of the thickness data of the photovoltaic glass; the positive and negative determination unit is used to determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface based on the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group.

[0090] Optionally, the positive and negative determination unit may specifically include a first duty cycle determination subunit, a smooth surface determination subunit and a velvet surface determination subunit. The first duty cycle determination subunit is used to define the ratio of the number of thickness data of the photovoltaic glass in the valid data group to the total number of thickness data of the photovoltaic glass as a first duty cycle; the smooth surface determination subunit is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface when the first duty cycle is greater than or equal to a first preset threshold value; the velvet surface determination subunit is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface when the first duty cycle is less than the first preset threshold value.

[0091] Optionally, the positive and negative determination unit may specifically include a second duty cycle determination subunit, a smooth surface determination subunit and a velvet surface determination subunit. The second duty cycle determination subunit is used to define the ratio of the number of thickness data of the photovoltaic glass in the empty data group to the total number of thickness data of the photovoltaic glass as a second duty cycle; the smooth surface determination subunit is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface when the second duty cycle is less than a second preset threshold; the velvet surface determination subunit is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface when the second duty cycle is greater than or equal to the second preset threshold.

[0092] Optionally, the data conversion module 320 may specifically include a data conversion unit, and the data conversion unit is used to convert the thickness data of the photovoltaic glass obtained by conversion into empty data when the signal strength of the echo beam signal is less than a third preset threshold.

[0093] Optionally, the front and back side detection device also includes a third duty cycle acquisition module, a smooth surface determination module and a velvet surface determination module. The third duty cycle acquisition module is used to respectively acquire the peak data of spectral sub-peaks corresponding to multiple echo beam signals, and the ratio of the number of echo beam signals corresponding to the fourth preset threshold whose peak data of the spectral sub-peaks is greater than or equal to the fourth preset threshold to the total number of echo beam signals is defined as the third duty cycle; the smooth surface determination module is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface when the third duty cycle is greater than or equal to the fifth preset threshold; the velvet surface determination module is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface when the third duty cycle is less than the fifth preset threshold.

[0094] Optionally, the front and back side detection device also includes a fourth duty cycle acquisition module, a glossy surface determination module and a velvet surface determination module, the fourth duty cycle acquisition module is used to respectively acquire light intensity data corresponding to multiple echo beam signals, and the ratio of the number of echo beam signals corresponding to the light intensity data greater than or equal to the sixth preset threshold to the total number of echo beam signals is defined as a fourth duty cycle; the glossy surface determination module is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a glossy surface when the fourth duty cycle is greater than or equal to the seventh preset threshold; the velvet surface determination module is used to determine that the surface of the photovoltaic glass facing the spectral confocal sensor is a velvet surface when the fourth duty cycle is less than the seventh preset threshold.

[0095] The front and back side detection device of the photovoltaic glass provided in the embodiment of the present invention can execute the front and back side detection method of the photovoltaic glass provided in any embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method.

[0096] Figure 8 It is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention. The terminal device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The terminal device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0097] like Figure 8 As shown, the terminal device 100 includes one or more processors 110, and a storage device, which is communicatively connected to the processor 110, such as a read-only memory (ROM) 120, a random access memory (RAM) 130, etc., wherein the storage device stores a computer program that can be executed by one or more processors, and the processor 110 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 120 or the computer program loaded from the storage unit 180 to the random access memory (RAM) 130. In the RAM 130, various programs and data required for the operation of the terminal device 100 can also be stored. The processor 110, the ROM 120, and the RAM 130 are connected to each other via a bus 140. An input / output (I / O) interface 150 is also connected to the bus 140.

[0098] A number of components in the terminal device 100 are connected to the I / O interface 150, including: an input unit 160, such as a keyboard, a mouse, etc.; an output unit 170, such as various types of displays, speakers, etc.; a storage unit 180, such as a disk, an optical disk, etc.; and a communication unit 190, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 190 allows the terminal device 100 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0099] The processor 110 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 110 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 110 performs the various methods and processes described above, such as the front and back detection method of photovoltaic glass.

[0100] In some embodiments, the front and back detection method of photovoltaic glass can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 180. In some embodiments, part or all of the computer program can be loaded and / or installed on the terminal device 100 via the ROM 120 and / or the communication unit 190. When the computer program is loaded into the RAM 130 and executed by the processor 110, one or more steps of the front and back detection method of photovoltaic glass described above can be performed. Alternatively, in other embodiments, the processor 110 can be configured to execute the front and back detection method of photovoltaic glass in any other appropriate manner (for example, by means of firmware).

[0101] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0102] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0103] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0104] To provide interaction with a user, the systems and techniques described herein may be implemented on a terminal device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball), through which the user can provide input to the terminal device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0105] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0106] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0107] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0108] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for detecting the front and back surfaces of photovoltaic glass, characterized in that: include: During a target acquisition period, the spectral confocal sensor is controlled to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass; wherein the target acquisition period is a time range from when the photovoltaic glass enters a preset detection area corresponding to the spectral confocal sensor to when the photovoltaic glass moves to leave the preset detection area corresponding to the spectral confocal sensor; Convert the received multiple echo beam signals into thickness data of the photovoltaic glass respectively; According to the thickness data of the photovoltaic glass, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface.

2. The front and back surface detection method according to claim 1, characterized in that: Determining, according to the thickness data of the photovoltaic glass, whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface comprises: According to the values ​​of the thickness data of the photovoltaic glass, the plurality of thickness data of the photovoltaic glass are divided into a valid data group and an empty data group; According to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group, it is determined whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface.

3. The front and back surface detection method according to claim 2, characterized in that: Determining whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group includes: The ratio of the number of the thickness data of the photovoltaic glass in the valid data group to the total number of the thickness data of the photovoltaic glass is defined as a first duty cycle; When the first duty cycle is greater than or equal to a first preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface; When the first duty cycle is less than the first preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

4. The front and back surface detection method according to claim 2, characterized in that: Determining whether a surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass in the valid data group or the thickness data of the photovoltaic glass in the empty data group includes: defining a ratio of the number of the photovoltaic glass thickness data in the empty data group to the total number of the photovoltaic glass thickness data as a second duty cycle; When the second duty cycle is less than a second preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface; When the second duty cycle is greater than or equal to the second preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

5. The front and back detection method according to claim 1, characterized in that: Converting the received multiple echo beam signals into thickness data of the photovoltaic glass respectively includes: When the signal strength of the echo light beam signal is less than a third preset threshold, the converted thickness data of the photovoltaic glass is empty data.

6. The front and back surface detection method according to claim 1, characterized in that: In the target acquisition cycle, after timing controlling the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receiving an echo beam signal reflected by the photovoltaic glass, the method further includes: Respectively acquiring peak data of spectral sub-peaks corresponding to a plurality of the echo beam signals, and defining a third duty cycle as a ratio of the number of the echo beam signals corresponding to which the peak data of the spectral sub-peaks is greater than or equal to a fourth preset threshold to the total number of the echo beam signals; When the third duty cycle is greater than or equal to a fifth preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface; When the third duty cycle is less than the fifth preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

7. The front and back surface detection method according to claim 1, characterized in that: In the target acquisition cycle, after timing controlling the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receiving an echo beam signal reflected by the photovoltaic glass, the method further includes: Respectively acquiring light intensity data corresponding to a plurality of the echo light beam signals, and defining a ratio of the number of the echo light beam signals corresponding to the light intensity data being greater than or equal to a sixth preset threshold to the total number of the echo light beam signals as a fourth duty cycle; When the fourth duty cycle is greater than or equal to a seventh preset threshold, determining that a surface of the photovoltaic glass facing the spectral confocal sensor is the light surface; When the fourth duty cycle is less than the seventh preset threshold, it is determined that a surface of the photovoltaic glass facing the spectral confocal sensor is the velvet surface.

8. A photovoltaic glass front and back detection device, characterized in that: include: A signal acquisition module is used to control the spectral confocal sensor to emit a detection beam signal toward the photovoltaic glass and receive an echo beam signal reflected by the photovoltaic glass during a target acquisition period; wherein the target acquisition period is the time range from when the photovoltaic glass enters a preset detection area corresponding to the spectral confocal sensor to when the photovoltaic glass moves out of the preset detection area corresponding to the spectral confocal sensor; A data conversion module, used for converting the received multiple echo beam signals into thickness data of the photovoltaic glass respectively; The front and back determination module is used to determine whether the surface of the photovoltaic glass facing the spectral confocal sensor is a smooth surface or a velvet surface according to the thickness data of the photovoltaic glass.

9. A terminal device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the front and back surface detection method of photovoltaic glass as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the front and back surface detection method of photovoltaic glass as described in any one of claims 1 to 7 is implemented.

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