Moving Robot UWB Antenna Spacing for Accurate Virtual Boundaries
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Solution Overview
Problem
Existing moving robots face challenges in accurately determining the relative location of Ultra-Wideband (UWB) tags, especially when signal disturbances occur, and in environments with changing frequencies, due to limitations in antenna placement and physical characteristics, which affect the determination of the tag's position relative to the robot.
Innovation Solution
A moving robot equipped with a communication unit featuring adjustable antennas that can change their distance based on the frequency used, allowing for precise determination of the UWB tag's location using a combination of antennas and sliding guide modules, and light emitting diodes to indicate the correct positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed antenna placement is used, then device complexity is reduced, but measurement precision of UWB tag location deteriorates
Solution Approach 1:
The patent implements adjustable antenna spacing where the distance between the first and second antennas can be dynamically changed based on the operating frequency. This dynamic adjustment allows the system to maintain optimal measurement precision across different frequencies while avoiding the need for multiple fixed antenna configurations, thus resolving the contradiction between measurement accuracy and device complexity.
Solution Approach 2:
The system changes the physical parameter of antenna spacing according to the operating frequency. By adjusting the distance between antennas based on frequency requirements, the system optimizes location determination accuracy for different UWB frequency bands without requiring a completely different antenna configuration, thereby maintaining measurement precision while controlling device complexity.
2Adaptability or versatility
If single frequency operation is used, then device complexity is reduced, but adaptability to different frequency environments deteriorates
Solution Approach 1:
The patent employs a dynamic antenna spacing mechanism that automatically adjusts the distance between antennas based on the detected operating frequency. This allows the system to adapt to different frequency environments (e.g., different UWB bands) while maintaining optimal performance, resolving the contradiction between adaptability and device complexity through a single adjustable configuration rather than multiple fixed systems.
3Measurement precision
If antenna distance is fixed, then manufacturing precision requirements are reduced, but measurement precision of tag location deteriorates
Solution Approach 1:
The system uses an adjustable antenna mechanism that allows post-manufacturing configuration of the antenna spacing. This dynamic adjustment capability enables precise positioning of antennas after manufacturing, reducing the stringency of manufacturing precision requirements while still achieving high measurement precision for UWB tag location determination.
Data Source
AI summary
A moving robot and a controlling method thereof are disclosed. A moving robot according to the present disclosure includes a traveling unit to move a main body, a communication unit to communicate with a location information transmitter for transmitting signals within an area, and a control unit to set a virtual boundary with respect to a location calculated based the signals, and to control the traveling unit to move the main body without departing from the boundary. The communication unit includes first and antennas provided at respective transceivers that transceive signals with the location information transmitter, and the first and second antennas have an adjustable distance. When signals are received through the first and second antennas, the control unit determines a relative location of the location information transmitter based on a current location of the main body using a frequency corresponding to the distance between the first and second antennas.