T/CAS 452-2020 Ground-based Three-Dimensional Trajectory Inertial Positioning Measurement Techniques for Underground Pipelines Specification

Scope

Scope: This standard specifies the basic requirements, technical preparations, data collection, data processing, quality inspection and control, and result preparation for inertial positioning measurement of three-dimensional trajectories of underground pipelines. This standard applies to inertial positioning measurement of three-dimensional trajectories of underground pipelines. Main technical content: 1. Scope: This standard specifies the basic requirements, technical preparations, data collection, data processing, quality inspection and control, and result preparation for inertial positioning measurement of three-dimensional trajectories of underground pipelines. This standard applies to inertial positioning measurement of three-dimensional trajectories of underground pipelines. 2. Normative references: The following documents are essential for the application of this document. For any referenced document with a date, only the version dated on that date applies to this document. For any referenced document without a date, the latest version (including all amendment sheets) applies to this document. CH/T 1033 Technical Regulations for Quality Inspection of Pipeline Measurement Results 3. Terms and definitions: The following terms and definitions apply to this standard. 3.1 Inertial positioning: A fully autonomous navigation and positioning technology that uses inertial sensors (gyroscopes, accelerometers, etc.) to calculate the instantaneous velocity, relative position, and attitude of the measurement carrier based on its acceleration (inertia) and angular rate. 3.2 Three-dimensional trajectory of underground pipelines: A curve diagram that reflects the spatial position information of underground pipelines, including plane coordinates and elevation. 3.3 Inertial positioning of three-dimensional trajectories of underground pipelines: A measurement technology that involves traveling through the pipeline with inertial sensors (gyroscopes, accelerome

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