Scanning Device Motion Tracking with Velocity-Based Distortion Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Scanning devices, such as laser scanning devices, face inaccuracies in tracking motion due to distorted surrounding information collected over time intervals, leading to incorrect location and position determination, especially when moving quickly or with larger time intervals.
Innovation Solution
A method that calculates the velocity of the scanning device from displacement data and corrects surrounding information using this velocity to provide undistorted data for precise location and position tracking, employing algorithms like ICP for displacement measurement and iterative convergence checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the scanning device collects surrounding information at constant time intervals during scanning, then the data collection process is simple and efficient, but the surrounding information becomes distorted due to device motion, leading to inaccurate location and position tracking
Solution Approach 1:
The patent applies preliminary action by calculating the displacement of the scanning device between the current scanning cycle and a reference scanning cycle before correcting the surrounding information. This displacement calculation is performed in advance to establish a correction baseline, allowing the system to compensate for motion-induced distortions in the collected data before final processing occurs.
Solution Approach 2:
The patent replaces direct mechanical measurement of device position with an optical-based substitution method. Instead of using additional mechanical sensors to track device movement, the system uses the surrounding information itself (collected via optical scanning) to infer device displacement and correct the data, thereby avoiding complex mechanical tracking systems.
2Speed
If the scanning device moves quickly to improve tracking responsiveness, then the real-time tracking capability is enhanced, but the distortion in surrounding information increases due to larger displacement during the scanning cycle
Solution Approach 1:
The patent implements feedback by using the surrounding information from a reference scanning cycle to calculate device displacement, which then feeds back into the correction process for the current scanning cycle's surrounding information. This closed-loop feedback mechanism allows the system to dynamically compensate for motion distortions even when moving quickly, maintaining accuracy despite high-speed operation.
3Device complexity
If the time interval between data collections is increased to reduce processing load, then the system complexity is reduced, but the distortion in surrounding information becomes more severe due to greater device movement during the extended scanning cycle
Solution Approach 1:
The patent introduces an intermediary correction process that acts as a mediator between the raw surrounding information and the final processed data. By calculating displacement based on reference scanning information and applying this as a correction factor, the system bridges the gap between simplified data collection and accurate representation of surroundings, maintaining precision without proportionally increasing complexity.
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
This method enables precise tracking of scanning device motion by correcting for time delays and velocity changes, reducing errors and improving accuracy in determining location and position, even under conditions of rapid movement or large time intervals.
Implementation Method 1
the laser scanning device 5 emits a laser, at a constant time interval Δts, sequentially to each of a plurality of the points in its surroundings, and collects the distance information for each of the points in its surroundings by calculating the time taken to turn back from the points to the device
Data Source
AI summary
The motion tracking method disclosed herein suggests a method for precisely tracking the motion of a scanning device by correcting the surrounding information distortedly recognized due to the time differences between pieces of information regarding the surroundings of the device over one scanning cycle. The method, as a motion tracking method of a scanning device collecting the surrounding information corresponding to a plurality of the points of the surroundings, includes collecting the surrounding information, obtaining the displacement data of the scanning device using the surrounding information, updating the velocity of the scanning device using the displacement data of the scanning device, correcting the surrounding information using the updated velocity of the scanning device, and determining location and position information of the scanning device using the corrected surrounding information. According to the method herein, the motion of the scanning device may be more precisely tracked because the surrounding information is corrected based on the velocity of the scanning device.