Anchor Point Orientation Calibration for Accurate Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for calibrating anchor points in positioning systems require manual or mechanical measurement of orientation, which is cumbersome and prone to errors, especially when the orientation of anchor points changes due to mechanical alterations or maintenance.
Innovation Solution
An improved calibration method that automatically updates the anchor orientation by determining the deviation between estimated and reference directions using a mobile device's ground truth position, iteratively adjusting the anchor orientation based on localization signals, and employing a steepest decent algorithm to minimize errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual or mechanical measurement of anchor point orientation is used, then the calibration process can be performed with simple equipment, but the calibration accuracy and time efficiency deteriorate
Solution Approach 1:
The patent replaces manual or mechanical measurement methods with an automated computational approach. The system uses localization signals between mobile devices and anchor points to calculate orientation deviations through coordinate transformations and optimization algorithms, eliminating the need for physical measurement tools and manual input while significantly improving both accuracy and efficiency
Solution Approach 2:
The calibration system performs self-calibration by automatically detecting orientation deviations and adjusting anchor point orientations without requiring external measurement equipment or manual intervention. The system uses its own localization signals and mathematical models to identify and correct orientation errors, making the calibration process autonomous and efficient
2Ease of manufacture
If manual input of anchor orientation is performed, then the system setup is simple, but the calibration accuracy deteriorates when mechanical alterations occur
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors the consistency between localization signals and anchor point orientations. When mechanical alterations occur, the system detects orientation deviations through coordinate transformations and automatically adjusts the anchor point orientations to restore accuracy, ensuring reliable calibration even after physical changes to the system
Solution Approach 2:
The system performs preliminary calibration by establishing initial anchor point orientations and then continuously validates them against localization signals. This preliminary setup maintains simplicity while the ongoing automated validation ensures accuracy is maintained after any mechanical alterations, as the system can detect and correct deviations
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method for calibrating an anchor point (ANC) in a positioning system comprises transmitting a localization signal between a mobile device (TG) and the anchor point (ANC), determining a first direction between the mobile device (TG) and the anchor point (ANC) in a local coordinate system based on the transmitted localization signal, and determining a second direction between the mobile device (TG) and the anchor point (ANC) in a global coordinate system based on the determined first direction and a stored anchor orientation of the anchor point (ANC). The anchor orientation defines the local coordinate system of the anchor point (ANC) with respect to the global coordinate system. A target position of the mobile device (TG) is acquired, wherein the target position is associated with the transmitted localization signal. A third direction between the mobile device (TG) and the anchor point (ANC) is determined in the global coordinate system based on a known anchor position and the target position. The stored anchor orientation is adjusted based on the first direction and a difference between the second and the third direction.