Photovoltaic power station string number character and geographic coordinate extraction system and method

Abstract

The invention relates to a system and a method for extracting string number characters and geographic coordinates of a photovoltaic power station, and aims to improve the efficiency and the accuracy of acquiring string number characters and geographic information of the photovoltaic power station. The system comprises a data acquisition module for acquiring a design drawing AutoCAD drawing of the photovoltaic power station and positive image raster data of the photovoltaic power station; the data processing module is used for segmenting the orthographic image data of the power station into square matrix level data (including orthographic raster data and images); the data fusion module is used for enabling group strings in the square matrix orthographic picture and the design drawing to be in one-to-one correspondence through Adobe illustrator; and the string serial number geographic information extraction module is used for extracting the geographic coordinate position information of the character center of the photovoltaic string serial number from the grid data of the square matrix level by adopting a technology of fusing a pixel coordinate system and a geographic coordinate system. And the system final output module generates a data file containing the photovoltaic string number and the corresponding geographic information.

Description

[0001] The present invention relates to the field of remote sensing technology, and in particular to a system and method for extracting text and geographic coordinates of photovoltaic power station string numbers. Background Art

[0002] A photovoltaic string is a series of photovoltaic modules connected in series and serves as the smallest unit for photovoltaic plant operations and maintenance. During the operation and maintenance of a photovoltaic power plant, maintenance personnel typically locate photovoltaic modules within the photovoltaic area based on the string numbers shown on the design drawings. Therefore, the string number and location directly impact the efficiency and accuracy of maintenance personnel's troubleshooting. Therefore, it is particularly important to accurately obtain the string number and location information for each string based on the design drawings.

[0003] Existing technology for obtaining string numbers and their geographic location information involves using drones to capture aerial images of PV power plants. Post-processing generates orthographic tile datasets, which are then attached to a map. Mapping technology is then used to annotate the string locations and numbers based on the PV power plant design and actual conditions. While this method achieves string number synchronization, it requires significant labor and is often inefficient and prone to errors.

[0004] Therefore, those skilled in the art have endeavored to develop a system and method for extracting text and geographic coordinates of photovoltaic power station string numbers. Summary of the Invention

[0005] In view of the existing technology, the problem solved by the present invention is to automatically extract the photovoltaic string number text and number center geographic coordinate information from the photovoltaic station remote sensing image data based on Adobe illustrator script and raster data processing technology, thereby greatly improving the efficiency and accuracy of synchronously mapping the string number data of the photovoltaic power station from the design drawing.

[0006] Data Collection Module: This module obtains the design drawings of the PV power plant, which were created by the design institute before construction. These drawings are saved as DWG files using AutoCAD software. Photographic data of the PV plant collected through drone-based aerial photography is then used to generate orthophoto raster data of the plant using mapping software.

[0007] Data processing module: Based on the GeoJSON data of the station array boundary planned in the PV power station AutoCAD design drawing, the Rasterio class library is used to cut the PV power station orthophoto raster data to generate array-level raster data. The array-level raster data is then proportionally compressed using the PIL and OpenCV class libraries to generate the corresponding array image data;

[0008] Data fusion module: Open the square matrix orthophoto and the design drawing in DWG format respectively through Adobe illustrator, and copy the corresponding square matrix group strings in the design drawing board to the orthophoto drawing board, and match the group strings in the design drawing with the group strings in the orthophoto one by one.

[0009] String number text and pixel position extraction module: A script is written based on the development library provided by Adobe Illustrator to batch extract string number text and number pixel position information from the orthophoto drawing board of Adobe Illustrator.

[0010] String number geographic information extraction module: This module integrates the pixel coordinate system and the geographic coordinate system to extract the geographic coordinate location information of the photovoltaic string number center from the array-level raster data;

[0011] Output module: Generates data files containing PV string numbers and corresponding geographic information. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 This is a flow chart of a system and method for extracting text from photovoltaic power station string numbers and geographic coordinates according to an embodiment of the present application; DETAILED DESCRIPTION

[0012] Step 1: Data Collection

[0013] Obtain the AutoCAD drawings of the photovoltaic power station design and the photovoltaic power station orthographic image raster data.

[0014] Step 2: Data Processing

[0015] Image segmentation: Use AutoCAD to export the GeoJSON data of the photovoltaic station array, and use the Rasterio library to segment the photovoltaic station orthophoto raster data to generate an array-level orthophoto raster data set.

[0016] Image compression: OpenCV and pillow are used to extract the array-level orthophoto raster data set to generate the corresponding array-level orthophoto image set.

[0017] Step 4: Extract string number text and pixel position

[0018] This script based on Adobe Illustrator can batch extract group number text and pixel position information from Adobe Illustrator's orthophoto drawing board.

[0019] Step 5: Extracting geographical information of string numbers

[0020] A practical loop method is used to batch extract the specific geographical location coordinate set corresponding to each string number from the array-level orthophoto raster data based on the pixel position data of each string number text and number center using the GDAL library.

[0021] Step 5: Output and string number display

[0022] The extracted geographic coordinate data of the string numbers are integrated into the GIS platform to generate a geographic information map of the string numbers. Users can view the distribution of the PV string numbers on the human-computer interface.

Claims

1. A system and method for extracting text and geographic coordinates of photovoltaic power station string numbers, characterized in that: include: Data acquisition module: obtains AutoCAD drawings of photovoltaic power station design and raster data of photovoltaic power station orthographic images; Data processing module: divides the photovoltaic power station orthophoto raster data into array-level data; Data fusion module: Open the square matrix orthophoto and the design drawing in DWG format respectively through Adobe illustrator, and copy the corresponding square matrix group string in the design drawing board to the orthophoto drawing board.

2. String number text and pixel position extraction module: Based on the Adobe Illustrator script, batch extract string number text and pixel position information from the orthophoto drawing board of Adobe Illustrator.

3. String number geographic information extraction module: This module integrates the pixel coordinate system and the geographic coordinate system to extract the geographic coordinate location information of the photovoltaic string number center from the array-level raster data; Output module: Generates data files containing PV string numbers and corresponding geographic information.

4. A photovoltaic power station string number text and geographic coordinate extraction system and method according to claim 1, characterized in that: The PV power station orthophoto grid is generated from PV field image data collected through drone surveying and aerial photography, using mapping software to generate the orthophoto grid data of the station. The PV power station design AutoCAD drawings are produced by the design institute before construction of the PV power station and must be saved in DWG format.

5. The system and method for extracting the serial number and geographic coordinates of a photovoltaic power station string according to claim 1, characterized in that: The data processing process is based on the GeoJSON data of the station array boundary planned in the AutoCAD design drawing of the photovoltaic power station, and uses a program to cut the station orthophoto raster data to generate array-level raster data and compressed array image data.

6. A photovoltaic power station string numbering text and geographic coordinate extraction system and method according to claim 1, characterized in that: The data is fused into the orthographic picture drawing board of Adobe illustrator, and the strings in the design drawing are matched one by one with the strings in the orthographic picture.

7. A photovoltaic power station string numbering text and geographic coordinate extraction system and method according to claim 1, characterized in that: The Adobe illustrator script for extracting the string numbered text and pixel position is written based on the development library provided by Adobe illustrator, and is used to obtain the text and text center position information on the current drawing board.

8. The system and method for extracting text and geographic coordinates of photovoltaic power station string numbers according to claim 1, characterized in that: The image coordinate system is a direct coordinate system established with the upper left corner of the image as the origin and the pixel as the unit, and the geographic coordinate system adopts the WGS84 coordinate system.

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