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An Accurate Positioning Method for Underground Pipelines Based on Geographical Coordinate Information of a Single Nozzle
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A technology of geographic coordinates and underground pipelines, applied in the directions of measuring instruments, instruments, surveying and navigation, etc., can solve the problem of inability to solve the precise geographic spatial position of the pipeline, and achieve the effect of high precision, high accuracy and fast measurement speed.
Active Publication Date: 2020-06-05
广东零偏科技有限公司
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[0007] The underground pipeline positioning technology in the above two patents can obtain the three-dimensional information of the pipeline when the geographical coordinate information of the starting point and the end point of the pipeline is known, but it cannot solve the position of the entire pipeline when there is only one geographical information of the pipeline point precise geospatial location
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Embodiment 1
[0035] like figure 1As shown, the pipeline to be tested is AB, where A is a known nozzle, and the geographic coordinates of the nozzle at end B are unknown. In this embodiment, the precise positioning of the pipeline AB is carried out, and a method for precise positioning of the underground pipeline based on the geographical coordinate information of a single nozzle is adopted, which includes the following steps:
[0036] ① Measure the coordinates of the known nozzle A of the pipeline, and prepare for measurement by wearing a traction rope in the pipeline to be tested;
[0037] ②A virtual point method is used to set a virtual extension pipeline AC at the nozzle of the known pipeline;
[0038] ③ Use instruments to measure the three-dimensional information of the pipeline from the nozzle C of the extension pipeline to the nozzle B of the unknown pipeline;
[0039] ④ Convert and obtain the three-dimensional geographic coordinate information of underground pipelines, and perform...
Embodiment 2
[0059] like figure 2 As shown, the pipeline AB to be tested, wherein A is a known nozzle, and B is a position nozzle, and the pipeline AB is accurately positioned in this embodiment.
[0060] Embodiment 2 is similar to Embodiment 1, the difference is that in step ②, the actual extension line method is used to obtain an extended section of curve CA by extending a section of actual pipeline at the known nozzle, and the length of the pipeline extension line is 1 Meter.
Embodiment 3
[0062] like image 3 As shown, the pipeline to be tested is AB, wherein A is a known nozzle, and the geographic coordinates of the nozzle at the B end are unknown. In this embodiment, the pipeline AB is accurately positioned.
[0063] Embodiment 3 is similar to Embodiment 1, the difference is that the working conditions of this embodiment cannot satisfy the actual pipeline along the outer section, so in step ③, the dotted line extension method is adopted, and a laser is used to extend a section in the tangential direction of the end A of the nozzle For the straight line MN, the length of the virtual extension line is 3.8 meters.
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Abstract
The invention provides an underground pipeline accurate positioning method based on single pipe orifice geographic coordinate information. The method includes steps of: 1) measuring coordinates of a known pipe orifice of a pipeline, and arranging pulling ropes through the to-be-tested pipeline in a penetrating manner for preparation of measurement; 2) by means of virtual point method, setting a virtual extending pipeline at the known pipe orifice of pipeline; 3) measuring the three-dimensional information of the pipeline from the pipe orifice of the extending pipeline to the pipe orifice of anunknown pipeline; 4) acquiring the three-dimensional geographic coordinate information of the underground pipeline through conversion, and performing data processing. The method is applied to the field of underground pipeline detection with combination of inert navigation technology and can accurately acquire the three-dimensional geographic coordinate information of the whole to-be-tested pipeline even only one tubular well is available in engineering practice.
Description
technical field [0001] The invention relates to the field of urban planning and safety, in particular to an underground pipeline positioning technology based on the geographic coordinate information of a single nozzle and inertial navigation technology. Background technique [0002] With the development of the economy and the expansion of cities, the number of urban underground pipelines such as water supply and drainage, electricity, and gas is increasing day by day. At the same time, there are more and more accidents caused by pipelines, and the economic losses are also increasing. The most important causes of accidents are the lack of archived pipeline data, changes in cities, outdated measurement methods, and sparse data points. In order to avoid huge economic losses and casualties caused by urban pipeline accidents, and to improve the utilization efficiency and management level of urban underground space, it is imperative to improve the accuracy and reliability of unde...
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