Autonomous Mobile Station Positioning Under Satellite Signal Blocking
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Solution Overview
Problem
The presence of large objects such as buildings and tall trees can block normal communication between satellite systems, base stations, and self-propelled devices, adversely affecting positioning and navigation control.
Innovation Solution
A self-propelled device equipped with a housing, traveling assembly, mobile station, and controller, which includes a satellite receiving antenna for acquiring satellite signals, a radio station for receiving radio signals from a base station, and a controller to detect blocking conditions by comparing satellite observation data with ephemeris data, allowing it to adjust its path and maintain communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a differential positioning system is used to improve positioning accuracy, then positioning precision is improved, but the system becomes vulnerable to blocking by large objects such as buildings and tall trees
Solution Approach 1:
The patent introduces an intermediary detection mechanism (satellite signal blocking detection module) that detects blocking conditions caused by large objects. This intermediary system monitors satellite signal reception quality and identifies blocking situations, allowing the positioning system to adapt or switch modes when blocking is detected, thus resolving the vulnerability to environmental obstructions while maintaining positioning accuracy
2Reliability
If satellite observation data is collected continuously to maintain positioning accuracy, then positioning reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of satellite observation data collection based on detected blocking conditions. When blocking is detected, the system adjusts its observation strategy (such as increasing sampling frequency or switching to alternative satellites) only in the affected time periods and spatial directions, rather than maintaining maximum observation intensity continuously. This dynamic adaptation maintains positioning reliability when needed while reducing energy consumption during normal operating conditions
Data Source
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AI summary
A self-propelled device includes a housing; a traveling assembly including traveling wheels and a traveling electric motor, where the traveling assembly is coupled to the housing; and a mobile station including a satellite receiving antenna and a radio station, where the satellite receiving antenna is configured to acquire a satellite signal, the satellite signal includes satellite observation data of the mobile station, the radio station is configured to receive a radio signal from a base station, and the radio signal includes satellite observation data of the base station. The self-propelled device further includes a controller configured to control the self-propelled device to autonomously travel and perform a work task.