Coverage Robot Beacon Navigation for Room Transition Control
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Solution Overview
Problem
Autonomous coverage robots face challenges in navigating between bounded areas without continuous human guidance, particularly in distinguishing between different rooms and transitioning between cleaning and migration modes efficiently.
Innovation Solution
The implementation of a directional receiver system on the robot, including omni-directional and directional receivers, allows the robot to detect emissions and align its drive direction, combined with a navigation beacon system that uses gateway and vectoring emissions to manage transitions between areas, enabling autonomous navigation and cleaning within bounded areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a directional receiver system with multiple component receivers is implemented to accurately detect emission direction, then the robot's navigation precision is improved, but the device complexity increases
Solution Approach 1:
The directional receiver is segmented into multiple component receivers (first and second component receivers) positioned at different locations on the chassis. Each component receiver detects emissions independently, and the controller processes these separate signals to determine the direction of the emission source, thereby improving angular resolution and detection precision.
Solution Approach 2:
The patent combines the signals from multiple component receivers through signal processing in the controller. By merging the detection data from spatially separated receivers, the system achieves more accurate emission direction determination than a single receiver could provide, while integrating the complexity into a unified navigation system.
2Reliability
If the robot uses both omni-directional and directional receivers for navigation, then the navigation reliability is improved, but the device complexity increases
Solution Approach 1:
The receiver system is designed with multi-functionality: the omni-directional receiver provides 360-degree emission detection for general navigation and room detection, while the directional receiver provides precise angular measurement for alignment and positioning. Both receivers serve multiple navigation functions, improving overall system reliability without requiring entirely separate systems for each function.
Solution Approach 2:
The controller acts as an intermediary that processes and integrates signals from both the omni-directional and directional receivers. It reconciles the data from both sensor types, determining when to use each receiver's information based on the navigation context, thereby harmonizing their combined output into reliable navigation decisions.
3Extent of automation
If the robot autonomously transitions between cleaning and migration modes based on emission detection, then the automation level is improved, but the difficulty of detecting and measuring environmental cues increases
Solution Approach 1:
The robot dynamically adjusts its navigation behavior based on real-time emission detection. The controller continuously monitors signals from both receivers and automatically transitions between cleaning mode (when emissions indicate a defined cleaning area) and migration mode (when emissions indicate transition to a new area), adapting its operation without human intervention.
Solution Approach 2:
The system uses feedback from the receiver signals to automatically determine when to switch between cleaning and migration modes. The controller processes the directional and omni-directional emission data, and when specific emission patterns are detected (such as emissions from a gateway beacon), it triggers automatic mode transitions, creating a closed-loop control system.
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 solution enables the robot to autonomously traverse and clean within bounded areas, accurately detect transitions between areas, and initiate migration modes, ensuring efficient room navigation and cleaning operations without human intervention.
Implementation Method 1
The conical reflector is disposed on an upper surface of the cavity to reflect emissions incident on the upper portion of the housing down into the cavity
Implementation Method 2
first and second component receivers housed in the receptacle and positioned to be responsive to the emission received through the first and second apertures, respectively
Data Source
AI summary
A navigation beacon controls movement of a mobile robot in first and second areas. The navigation beacon includes a portable housing, a power source, and an emitter. The emitter is operable to emit a gateway marking emission when the robot is within a field of detection that extends between the areas. The gateway marking emission is detectable by the robot and prevents the robot from moving from one of the areas, through the field of detection, to the other of the areas. A switch is operable to switch the navigation beacon to be in an OFF mode in which the gateway beacon emitter is in an OFF state, a confinement mode in which the gateway beacon emitter is in an ON state, and a navigation mode in which the gateway beacon emitter is in the ON state and automatically switches to the OFF state in response to a predetermined condition.