Self-Moving Navigation Control for Satellite Signal Dead Zones
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Solution Overview
Problem
Self-moving devices face navigation challenges in areas with poor satellite signal coverage, leading to reduced precision and potential damage due to inaccurate positioning, especially when obstacles block GPS or DGPS signals, and inertial navigation systems degrade over time.
Innovation Solution
A self-moving device with a control module that adjusts its movement based on satellite navigation quality, switching to inertial navigation when necessary, and using location sensors to maintain high-precision navigation by moving towards expected locations with better signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If GPS navigation is used when traveling alongside obstacles, then navigation can be performed, but positioning precision deteriorates due to signal blocking
Solution Approach 1:
The patent combines GPS navigation with inertial navigation to form a hybrid navigation system. When GPS signal quality deteriorates due to obstacles, the system seamlessly transitions to inertial navigation, maintaining both operational capability and positioning precision without relying on a single navigation method.
Solution Approach 2:
The system dynamically changes navigation parameters by switching between GPS-based positioning and inertial-based positioning based on signal quality assessment. This parameter change allows the system to adapt to varying environmental conditions and maintain precision despite signal blocking.
2Adaptability or versatility
If inertial navigation system is used, then navigation can continue without signal blocking, but positioning precision deteriorates over time
Solution Approach 1:
The system periodically switches between GPS navigation and inertial navigation based on signal quality assessment. When GPS signal quality is good, it uses GPS positioning; when signal quality deteriorates, it transitions to inertial navigation. This periodic switching maintains navigation continuity while minimizing precision loss through regular recalibration.
3Measurement precision
If device stops to perform computation for accurate coordinates, then positioning precision improves, but working efficiency deteriorates
Solution Approach 1:
The system maintains continuous navigation operation by using inertial navigation during signal-blocking periods without stopping the device. This eliminates computation pauses and maintains working efficiency while still achieving accurate positioning through the hybrid navigation approach.
Solution Approach 2:
Instead of stopping to compute accurate coordinates, the system rushes through the navigation challenge by using inertial navigation to maintain positioning continuity, thereby avoiding interruptions and maintaining working efficiency.
4Adaptability or versatility
If DGPS base station and mobile station cannot receive signals of at least four satellites together, then precise positioning can be performed, but positioning precision deteriorates due to dead zone
Solution Approach 1:
The inertial navigation system acts as an intermediary when DGPS cannot function due to satellite signal blocking. It bridges the navigation gap in dead zones, maintaining positioning precision where traditional DGPS fails.
5Ease of operation
If radio wave transmission from charging station encounters obstacles, then data communication can be performed, but signal attenuation occurs reducing positioning precision
Solution Approach 1:
The system uses a portable base station that can be temporarily positioned to establish clear signal paths, rather than relying on a fixed charging station antenna. This temporary, flexible approach overcomes obstacle-induced signal attenuation.
Data Source
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AI summary
The present invention relates to a self-moving device, including: a moving module, a task execution module, and a control module. The control module is electrically connected to the moving module and the task execution module, controls the moving module to actuate the self-moving device to move, and controls the task execution module to execute a working task. The self-moving device further includes a satellite navigation apparatus, electrically connected to the control module and configured to receive a satellite signal and output current location information of the self-moving device. The control module determines whether quality of location information output by the satellite navigation apparatus at a current location satisfies a preset condition, and controls, if the quality does not satisfy the preset condition, the moving module to actuate the self-moving device to change a moving manner, to enable quality of location information output by the satellite navigation apparatus at a location after the movement to satisfy the preset condition. A beneficial effect of the present invention is: when the self-moving device moves to an area where a satellite navigation signal is poor, by changing a moving manner, the self-moving device can maintain high-precision navigation.