Cleaning Robot UWB Positioning and Radar Obstacle Detection
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Solution Overview
Problem
Existing cleaning robots face difficulties in accurately detecting the position of users and obstacles due to external influences such as color, light, and noise, which affects their precision and operation.
Innovation Solution
The implementation of ultra-wide band communication methods using impulse signals for precise user and obstacle detection, employing multiple ultra-wide band communication modules to calculate distances and triangulate positions, and using radar sensors to sense obstacles robustly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared light or ultrasonic waves are used for obstacle detection, then the cleaning robot can sense and avoid obstacles, but the detection precision is low due to external influences such as color, light, temperature, and noise
Solution Approach 1:
The patent replaces optical and acoustic detection systems (infrared light, ultrasonic waves) with electromagnetic wave-based radar detection. The radar sensor transmits electromagnetic waves and detects reflected waves to determine obstacle position, eliminating susceptibility to visible light color, ambient lighting conditions, and acoustic noise while maintaining obstacle detection capability.
Solution Approach 2:
The patent changes the detection parameter from optical/infrared wavelength to electromagnetic wave frequency used in radar systems. This parameter change allows the detection system to operate independently of visible light conditions and color variations, achieving stable obstacle detection regardless of environmental lighting or temperature changes.
2Ease of operation
If the user uses a remote control to move the cleaning robot to a specific location, then the user can control the cleaning robot, but the user has difficulties in controlling driving of the cleaning robot when not knowing its position
Solution Approach 1:
The patent implements a feedback mechanism where the cleaning robot automatically transmits its position information to the user terminal device. The user can view the robot's real-time location on a map interface, providing continuous feedback about robot position without requiring the user to physically search for the robot. This enables informed remote control operations.
Solution Approach 2:
The cleaning robot performs self-positioning and automatically reports its location to the user terminal. This self-service function eliminates the need for the user to manually locate the robot before each control operation, allowing the user to remotely guide the robot to specific cleaning locations based on accurate position information.
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 precision and reliability of user and obstacle detection, allowing the cleaning robot to accurately follow users and navigate around obstacles without interference from external factors.
Implementation Method 1
a controller configured to transmit a position detecting signal to the user terminal, and detect a position of the user terminal based on a time difference between the position detecting signal and a response signal transmitted from the user terminal
Implementation Method 2
a front-obstacle sensing unit configured to transmit a front-sensing radio wave toward a front of the main body and detect a front-reflected radio wave reflected from a front obstacle
Data Source
AI summary
Provided is a cleaning robot including a main body; a driving unit configured to move the main body; a communication unit configured to establish wireless communication with a user terminal to which a manipulation command is input; and a controller configured to transmit a position detecting signal to the user terminal, and detect a position of the user terminal based on a time difference between the position detecting signal and a response signal transmitted from the user terminal.