Shielding Detection in Mobile Mapping Systems
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Solution Overview
Problem
In mobile mapping systems, shielding during mobile measurement reduces efficiency as users often discover shielded sections only during post-processing, leading to repeated measurements and decreased operational efficiency.
Innovation Solution
A shielding detection device that uses three-dimensional point group data to automatically detect shielded sections and generate a target road map distinguishing between measured and unmeasured areas, allowing users to identify and address shielding issues promptly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mobile measurement is performed with a laser scanner, then road surface measurement can be conducted efficiently, but shielding by obstacles causes unmeasured sections that reduce measurement completeness
Solution Approach 1:
The patent applies preliminary action by detecting shielding during the measurement process itself rather than waiting for post-processing. The shielding detection unit continuously monitors the measurement data to identify unmeasured sections caused by shielding, allowing operators to take corrective action (such as repositioning the measuring vehicle or adjusting measurement parameters) before completing the measurement run, thereby ensuring measurement completeness without sacrificing efficiency
Solution Approach 2:
The patent implements feedback by providing real-time information about shielding conditions to the operator. The result display unit presents detection results that show which sections are unmeasured due to shielding, enabling the operator to make informed decisions about whether to pause and address the shielding issue or continue measurement, thus maintaining both efficiency and completeness
2Loss of time
If shielding detection is performed during measurement, then shielded sections can be identified promptly, but additional processing increases system complexity
Solution Approach 1:
The patent applies universality by making the existing measurement system perform multiple functions. The laser scanner and data processing unit, which are already part of the mobile mapping system, are utilized for both primary measurement and shielding detection. The shielding detection unit analyzes the same measurement data to identify unmeasured sections, and the result display unit presents this information in an integrated interface, thereby reducing additional hardware complexity while enabling timely shielding identification
Solution Approach 2:
The patent implements self-service by having the measurement system automatically detect and report its own shielding issues. The shielding detection unit processes the measurement data generated by the system's own laser scanner to identify sections that were unmeasured due to shielding, eliminating the need for separate external detection equipment and reducing overall system complexity while providing real-time feedback
Data Source
AI summary
A shielding detection unit (111) detects one or more shielded sections in which a road surface of a target road, on which a measuring vehicle has traveled, has not been measured, based on three-dimensional point group data indicating a three-dimensional coordinate value of each measurement spot that has been measured by a laser scanner mounted on the measuring vehicle. A result display unit (112) generates a target road map and displays the target road map, the target road map indicating the target road and indicating the one or more shielded sections in a manner to distinguish the one or more shielded sections from each unshielded section in which the road surface of the target road has been measured.