2D Laser Scanner Profile Correction via Inclination Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 2D laser scanners face challenges in accurately determining profile sections of objects and spaces due to potential misalignment of the measuring plane with respect to a horizontal or vertical reference plane, leading to distorted measurements that are not well-suited for further evaluation.
Innovation Solution
A method that uses a 2D laser scanner with a laser rangefinder to record distance measurement values and directions in a measuring plane, and corrects the profile section by determining the angle of inclination of the measuring plane using calibration measurements or trigonometric calculations, allowing for projection of data onto an ideal reference plane without the need for additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the laser scanner is used to measure objects and spaces, then distance measurement values and directions can be recorded, but the measurements become distorted when the measuring plane is misaligned with the reference plane
Solution Approach 1:
The patent applies parameter changes by mathematically transforming the measured data from the inclined measuring plane to the reference plane using inclination angle parameters. The computing unit calculates the angle of inclination and uses trigonometric transformations to correct the distance measurement values, converting them from the distorted state to an accurate reference-aligned state without requiring physical realignment of the device
Solution Approach 2:
The patent replaces the mechanical alignment system with a computational correction system. Instead of requiring the laser scanner to be physically aligned with the reference plane through mechanical adjustment, the system uses software-based correction algorithms that process the raw measurement data and mathematically realign it to the reference plane using the determined inclination angle
2Measurement precision
If additional sensors are added to determine the angle of inclination, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The laser scanner performs self-measurement of its own inclination angle by using its existing laser rangefinder to measure distance values at different angles. The system calculates the inclination angle from these self-collected measurement data without requiring external sensors or additional measurement devices, making the system self-sufficient
Solution Approach 2:
The laser rangefinder serves multiple functions: it both measures the distance to target objects for profile section determination and simultaneously measures the inclination angle of the measuring plane. This multi-functionality eliminates the need for separate inclination sensors, reducing device complexity while maintaining measurement precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and efficient determination of profile sections by correcting for inclination, ensuring that measurements are aligned with a reference plane, thus providing undistorted data for evaluation and processing, such as surface calculations and floor plans.
Implementation Method 1
From the emitted laser radiation and the laser radiation reflected from the surface of the target object, a light transit time is determined by means of a phase comparison and the desired distance measurement value between the laser rangefinder, i.e. the 2D laser scanner, and the target object is determined from the speed of light
Implementation Method 2
Alternatively, the light transit time can also be determined from a flight time determination
Implementation Method 3
The 2D laser scanner is specifically configured to have the laser beam of the laser rangefinder traverse a measuring plane at least partially in the radial direction—starting from the laser rangefinder in the center
Data Source
AI summary
The disclosure relates to a method for determining a profile section of an object and/or space by means of a 2D laser scanner having a laser rangefinder, including:recording mutually assignable distance measurement values and distance measurement directions by means of the laser rangefinder in a measuring plane traversed radially by a laser beam of the laser rangefinder,determining the profile section,from the distance measurement values and distance measurement directions,determining an angle of inclination of the measuring plane with respect to a reference plane, andcorrecting the profile section using the angle of inclination of the measuring plane.According to the disclosure, the angle of inclination of the measuring plane is determined by using the laser rangefinder.The disclosure also relates to a 2D laser scanner and to a system.