Electronic and efficient mapping of axonometric drawings at the inspection site is an important means to realize the digitization and intelligence of the pressure pipeline inspection process.An axonometric mapping method suitable for rapid on-site inspection of pressure pipelines was proposed.Pipeline routing data can be quickly obtained through inertial navigation.Pipeline length can be measured using the method of measuring the length of the opposite side of a triangle.The three-dimensional wire frame model of the pipeline can be transformed into two-dimensional axonometric drawing through multiple coordinate transformations.A pressure pipeline axonometric mapping instrument was developed based on the above methods.The inspection system consists of intelligent tablet computers,surveying and mapping instrument,ultrasonic thickness gauges,and other modules,which can automatically or manually draw pipeline axonometric maps and interactively input on-line inspection data in the inspection system application.The application process of the system was introduced through inspection examples.The results indicated that the efficiency of pressure pipeline inspection and the level of digitalization and intelligence of the inspection process can be greatly improved by utilizing the developed inspection system.
Pressure pipelineSingle line diagramInspectionSurveying instrumentAzimuth
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