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ZoPMethod and device for monitoring and detecting ground deformation and settlement by using high altitude digital beat Technology
autorzy: Tao Yanglin
I. Overview: In the past, the topographic deformation caused by the drift effect of the earth's plate and the surface subsidence and collapse caused by the over-harvesting of underground minerals and groundwater were all measured with a set ruler to measure the displacement and orientation caused by the deformation. The method of inter-location variables is not only inefficient, but also cannot perform large-scale cloud measurements, so it is not conducive to earthquake prediction and its large-scale monitoring. The present invention uses a large number of digital cameras to take a large number of digital photos on the top of the mountain, the roof of the building, using aerial photography or through synchronous satellites, and adopts a fixed place, a fixed angle, a fixed field of view, and a fixed background and regular continuous shooting methods to collect digital signals for analysis. By comparing photos in different periods, you can find the change points, change groups and changes in the picture, and understand the quantitative indicators of these changes through the change values of consecutive photos. This method can support computer modeling, analyze the trends of these variables, and alert abnormal conditions, and can provide a large amount of data to the field of seismic geography for scientific research, which is of great significance. 2. Principle 1. Fixed-point continuous shooting method: Fix the camera on the top of the mountain, the roof, and the synchronous satellite to shoot for several days, months, or even years. If the terrain remains unchanged, you will get multiple identical photos, and once there is abnormal geological activity somewhere, the image will be The digital value of the image will also change accordingly. As long as these changing values are taken out and analyzed using image recognition technology, the law can be grasped. 2. Stereo images and stereo analysis Using three cameras to photograph the same position from three different angles, a stereo image can be obtained, and the stereo value of the variable can be obtained. 3. For mobile photos taken by unmanned aircraft, manned aircraft and synchronous satellites, as long as the flight route and altitude remain unchanged, the same photos and videos can be obtained. If the terrain changes, the corresponding photos, Photo and digital values will change. 4. Since the digital camera probe has been widely used, the cost is low. It is possible to install a certain scale of camera groups on a large number of mountain tops to achieve automatic shooting and wireless transmission, so as to obtain a large amount of image data; Cloud detection and cloud measurement for large-scale topographic changes; based on these data, even weak intra-earth stress changes can be detected, enabling earthquake prediction and range prediction. 5. Image variable anti-interference technology If it is due to local changes in the image caused by clouds and vehicles, anti-interference technology can be used in future software to automatically eliminate these variables. 6. Image recognition technology software and earthquake risk prediction platform Software that studies and uses image recognition technology to automatically identify, adopt, compare, and graph these variables based on theory; after the collected data is scaled, the plate activity and earthquake history in the region will be aggregated into a specific platform, according to Bayesian Statistical models predict the probability and scope of earthquake occurrence. 3. Experimental research Experimental materials: two cameras; one LAN device control box; several connecting devices; several power supplies and network cables; one self-made scene sandbox model; camera network control platform; (See Figure 1 for the equipment construction diagram) Experimental method: Use two cameras to shoot the variables in the scene model in multiple directions, set the mode to timed tour shooting, and set two preset points as the shooting start and end points; after all images are obtained, the displacement and orientation are analyzed on the computer , Photoshop software was used to process abnormal variables and perform image overlap analysis.
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