Dual-Laser Robot Localization in Unreliable Mapping Zones
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Solution Overview
Problem
Existing mobile robot localization systems face challenges in accurately determining the location of robots in dynamic or unreliable environments, where changes in the environment, such as unmapped areas or high traffic zones, can lead to confusion and loss of location.
Innovation Solution
A mobile robot system equipped with dual laser scanners that can operate in both a full 360-degree mode and a single-laser-scanner mode, switching based on the robot's position and orientation relative to designated areas, allowing the system to adapt and avoid unreliable data for localization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single laser scanner is used for localization, then the device complexity is reduced, but the reliability of localization in dynamic environments deteriorates
Solution Approach 1:
The system employs multiple laser scanners that can serve different functions depending on the operational context. The first laser scanner is used for general localization, while the second laser scanner is activated specifically when the robot enters a designated area with unreliable localization conditions. This multi-functionality allows the system to maintain high reliability without permanently increasing device complexity.
Solution Approach 2:
The system dynamically switches between single laser scanner mode and dual laser scanner mode based on the robot's location and environmental conditions. The localization system adapts its configuration in real-time, activating the second laser scanner only when needed in designated areas with unreliable localization, thereby optimizing the balance between device complexity and localization reliability.
2Measurement precision
If dual laser scanners operate simultaneously in all modes, then the measurement precision of robot location is improved, but the use of energy increases
Solution Approach 1:
Instead of continuously operating both laser scanners at full capacity, the system applies partial action by activating the second laser scanner only partially (only when the robot is in designated areas with unreliable localization). This selective activation maintains measurement precision when needed while significantly reducing overall energy consumption compared to continuous dual-scanner operation.
Solution Approach 2:
The system changes the operational parameters of the laser scanners based on environmental conditions and robot location. By monitoring the robot's position relative to designated areas and adjusting which scanners are active, the system optimizes the balance between measurement precision and energy consumption, maintaining high accuracy in critical zones while conserving energy in normal operating conditions.
3Productivity
If the robot uses laser scan data from unreliable areas, then the productivity of localization updates is maintained, but the reliability of location determination deteriorates
Solution Approach 1:
The system extracts and excludes unreliable laser scan data from designated areas with dynamic or unreliable environmental conditions. By identifying and separating problematic data sources from the localization process, the system maintains continuous localization updates using reliable data while filtering out data that would compromise accuracy, thus resolving the contradiction between update frequency and location accuracy.
Solution Approach 2:
The system implements feedback mechanisms to monitor the reliability of laser scan data from different areas. When the robot enters designated areas with unreliable localization conditions, the system detects this through feedback from its position system and adjusts its data selection accordingly, maintaining both productivity and reliability by dynamically adapting which scan data is used for localization updates.
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
Enhances the robot's ability to maintain accurate localization even in dynamic environments by selectively using data from either laser scanner, reducing the risk of becoming lost and improving navigation.
Implementation Method 1
a first laser scanner, a second laser scanner
Data Source
AI summary
A mobile robot can include a first laser scanner and a second laser scanner. The robot position can be compared to a designated area to determine whether the robot is inside the designated area. One of the first laser scanner or the second laser scanner can be selected to use for localization based at least on whether the robot is inside the designated area. A laser scan can be performed using the selected one of the first laser scanner or the second laser scanner to provide laser scan information. The laser scan information can be compared to a mapping of an area around the robot to determine a location of the robot.