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![Mobile phone base station communication tower The most used cellular mobile phone base station communication tower is usually built at a certain distance due to the requirements of layout and coverage. The tower is about 30~60m high. There are 2~3 floors on the tower and 5~6 m apart from each other. As such communication towers are widely distributed in urban and rural areas, their size is huge, and the number is astonishing. During the service life, due to long-term load action or sudden disaster [2], the steel tower structure will have potential safety hazards, which will seriously endanger the safety of human life and property. So it is necessary to carry out regular structural health monitoring for such steel tower structures. Our country structure for structural monitoring foreign communications tower is relatively late, in recent years has been found in the relevant monitoring products, most of these products are based on the deformation sensors collect information, monitoring is a method of contact. Contactless monitoring methods will undoubtedly bring a lot of trouble and danger, such as workers need to climb the tower for maintenance of the instrument, the limited life of the sensor and monitoring costs higher. This paper introduces a method of monitoring the deformation of a non-contact, monitoring the deformation of steel tower structure using the PDMS (photography dynamic monitoring system). This method not only overcomes all the obvious flaws of previous contact measurement, but also greatly reduces the cost of monitoring, the current method has been successfully applied to steel, masonry structures, bridges, dam structure, aircraft structure, and high-rise buildings the steel has a large venue [3-7] or the like deformation monitoring good effect.](publication/344563778/figure/fig1/AS:947486164258816@1602909713373/Mobile-phone-base-station-communication-tower-The-most-used-cellular-mobile-phone-base.png)
Mobile phone base station communication tower The most used cellular mobile phone base station communication tower is usually built at a certain distance due to the requirements of layout and coverage. The tower is about 30~60m high. There are 2~3 floors on the tower and 5~6 m apart from each other. As such communication towers are widely distributed in urban and rural areas, their size is huge, and the number is astonishing. During the service life, due to long-term load action or sudden disaster [2], the steel tower structure will have potential safety hazards, which will seriously endanger the safety of human life and property. So it is necessary to carry out regular structural health monitoring for such steel tower structures. Our country structure for structural monitoring foreign communications tower is relatively late, in recent years has been found in the relevant monitoring products, most of these products are based on the deformation sensors collect information, monitoring is a method of contact. Contactless monitoring methods will undoubtedly bring a lot of trouble and danger, such as workers need to climb the tower for maintenance of the instrument, the limited life of the sensor and monitoring costs higher. This paper introduces a method of monitoring the deformation of a non-contact, monitoring the deformation of steel tower structure using the PDMS (photography dynamic monitoring system). This method not only overcomes all the obvious flaws of previous contact measurement, but also greatly reduces the cost of monitoring, the current method has been successfully applied to steel, masonry structures, bridges, dam structure, aircraft structure, and high-rise buildings the steel has a large venue [3-7] or the like deformation monitoring good effect.
Source publication
With the advent of next-generation cellular mobile communication technology, the world ushered in a new communications tower construction boom to protect the safe operation of the communication towers without delay. In this paper, we monitored the dynamic deformation of the communication tower using the PDMS (photography dynamic monitoring system)....
Context in source publication
Context 1
... antenna on the communications tower, there are mobile phone antennas or Other sectors antennas, generally. Figure 1 shows the four kinds of the communication tower. In recent years, infrastructure in China has improved steadily, all kinds of new communication technology constantly emerging, especially the latest generation of cellular mobile communication technology, 5th generation mobile networks, once again aroused the climax of communication tower construction in China. ...
Citations
... It can monitor several sites simultaneously and acquire transient deformation information. At present, this technology has been applied successfully to the dynamic deformation monitoring of several objects, such as steel structures [22], bridges [23,24] masonry walls [25], aeroplane wings [26] and large steel-structure buildings [27,28]. Studies on dynamic deformation monitoring using digital close-range photogrammetry technology based on digital cameras are relatively mature. ...
The penetration of large-diameter tubular piles and their relevant construction effect have significant influences on the bearing capacity of piles and nearby buildings (structures). This study focuses on developing an indoor test model device for the dynamic field monitoring of the construction effect of penetrated large-diameter tubular piles based on monocular visual digital photography. The results show that the relationship between the penetration of the tubular piles and time function (blow counts) changes from a logarithmic function to a linear function when piles penetrate from the loose layer to the sandy layer, and then to the silty soil layer. The penetration rates differ significantly under different formation conditions. There are obvious plugging and squeezing effects as tubular piles penetrate different strata. The plugging effect radiates outward in a rectangular shape. The influence sphere of the squeezing effect is divided into the shear failure zone, radial squeezing zone, and hemispherical expansion zone. According to the measurement data, the squeezing effect increases first and then weakens during the construction of tubular piles. This makes the adjacent pile deviate from the initial position by 17.4 mm, making the next pile deviate from the initial position by 6.4 mm, to the maximum extent. This further verifies the superiority of pile-jumping construction. The research conclusions can provide reasonable suggestions and a reference basis to improve the penetration parameters of tubular piles and optimise their construction techniques.
... In order to carry out geomorphic change research [9] and Hydraulic Research [10,11] With the development of computer vision technology, some scholars combine it with photogrammetry technology, carry out image matching through SFM [12] or MVS (Multiview-stereo) and other algorithms [13,14], and establish three-dimensional models of geomorphology and historical monuments [15] such as river channels [16]. Some scholars use digital photogrammetry for slope monitoring, [17,18] and deformation monitoring of common structures [19,20,21]. ...
In order to clearly understand the current status and application trends of digital photogrammetry domestic and overseas research, taking the core journals of Web of Science as the data source, using bibliometric methods and CiteSpace to carry out statistical analysis of the relevant literature of digital photogrammetry research. The results show that since 2011, the research literature on digital photogrammetry has shown a steady growth year by year. Digital photogrammetry is most closely related to the three disciplines of geology, earth science integration, and physical geography; countries such as the United States, the United Kingdom, Italy, and China publish the most papers, and these countries have strong research capabilities. Lane SN and Chandler JH have been shared with a high number of citations, who are representative scholars in this field; Digital photogrammetry contains multiple research directions. This article studies the research hotspots and frontiers of digital photogrammetry through keyword co-occurrence analysis and mutation detection analysis.
... Photography, as a noncontact measurement technology, has attracted more and more attention in the past decades, mainly because of its nondestructive imaging characteristics of high precision and sensitivity. Some scholars have successfully applied photogrammetry technology to the deformation monitoring of engineering structures such as steel towers [2], bridges structures [3], masonry structures [4], and so on [5][6][7]. e DLT (direct linear transformation) method [8] and the MP (motion parallax) method [9] are two conventional methods used to obtain the deformation of the monitoring points. ...
The height irregularity and complexity of steel structures bring difficulties to dynamic deformation monitoring. PDMS (photogrammetric dynamic monitoring system) can obtain the dynamic deformation of the steel structure, but the flexibility of monitoring is limited because the camera station can only be placed on the ground. In this study, UAV (unmanned aerial vehicle) -PDMS is innovatively proposed to be used in monitoring dynamic deformation of steel structures, and it is verified in the steel frame test and Jinan Olympic Sports Center Tennis Stadium test. To solve the problem that the attitude of UAV cannot be strictly maintained in the hovering process, the improved Z-MP (zero-centered motion parallax) method is used, and the monitoring results are compared with the original Z-MP method. The feasibility of UAV-PDMS applied to steel structure deformation monitoring and the feasibility of improving the Z-MP method to reduce UAV hovering error are verified. The monitoring results showed that the steel structures of the Jinan Olympic Sports Center Tennis Stadium were robust, and the deformations were elastic and within the permissible value.
The spatial structure building is a type of building system; it is necessary to monitor deformation to determine its stability and robustness. Under the dynamic deformation of structures, it is challenging to determine appropriate zero image (the reference image) if we use the PST-IM- MP (photograph scale transformation-image matching-motion parallax) method to obtain the deformation of structures. This paper offers the Z-MP (zero-centered motion parallax) method to solve these problems and offers PDMS (Photography Dynamic Monitoring System) based on the digital photography system to monitor the dynamic deformation of the tennis stadium located in Jinan Olympic Sports Center. The results showed that the spatial structures of the tennis stadium were robust, and the deformations were elastic and within the permissible value. Compared with the PST-IM-MP method, the Z-MP method is more suitable for deformation monitoring structures under real-time deformation. This paper indicates PDMS has advantages of the simplicity of operations, automation, and the ability of non-contact dynamic deformation monitoring for multiple points in a short period. In the future, it will have broader application prospects.
