Autonomous Mobile Radar Mapping via Self-Rotating SAR Frame
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Solution Overview
Problem
Autonomous mobile devices, such as robots and drones, face challenges in creating accurate surroundings maps and localizing themselves without colliding with objects, especially during initial propulsion, due to limited detection capabilities and the need for additional moving components.
Innovation Solution
The integration of a synthetic aperture radar (SAR) sensor that rotates with the device frame to form a circular synthetic aperture, allowing for simultaneous localization and mapping (SLAM) and enabling collision-free propulsion by generating a surroundings map and ascertaining the device's location before translatory movement, using existing components like the drive unit and chassis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a synthetic aperture radar sensor is integrated with the device frame to form a circular synthetic aperture through self-rotation, then accurate localization and surroundings mapping are achieved, but the device complexity increases
Solution Approach 1:
The synthetic aperture radar sensor is merged with the device frame to form an integrated detection system. The sensor rotates together with the frame to create a circular synthetic aperture, eliminating the need for separate mounting structures and reducing overall system complexity while maintaining high measurement precision for localization and mapping
Solution Approach 2:
The device frame serves multiple functions: it provides structural support for the device and simultaneously acts as a mounting structure for the radar sensor that enables circular aperture formation. This multi-functionality reduces the number of separate components needed, addressing the device complexity issue while achieving accurate localization
2Measurement precision
If the synthetic aperture radar sensor rotates with the device frame to form a circular synthetic aperture, then high-resolution surroundings maps are generated, but the area occupied by the detection unit increases
Solution Approach 1:
The radar sensor is combined with the device frame into a single integrated unit. By utilizing the frame's existing structure and rotation capability, the system generates high-resolution surroundings maps without requiring additional space for separate sensor mounting, thereby maintaining compact device dimensions
3Device complexity
If the drive unit is used to generate self-rotation of the device frame for forming the circular synthetic aperture, then additional moving components are eliminated, but the propulsion force generation is affected
Solution Approach 1:
The drive unit is designed to perform multiple functions: it generates propulsion force for device movement and simultaneously generates the self-rotation needed for the radar sensor to form a circular synthetic aperture. This multi-functionality eliminates the need for separate rotation mechanisms, reducing the number of moving components while maintaining adequate propulsion capability
Solution Approach 2:
The drive unit's operation is dynamically adjusted to serve different purposes at different times. During certain operational phases, it provides forward propulsion, while during others, it enables self-rotation for aperture formation. This dynamic versatility allows a single drive unit to fulfill multiple roles without compromising either propulsion or detection functionality
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 provides a low-wear, space-saving, and cost-effective detection unit for autonomous mobile devices, enabling accurate localization and collision-free operation by generating a high-resolution surroundings map and ensuring safe initial propulsion.
Implementation Method 1
the detection unit including at least one synthetic aperture radar (SAR) sensor
Data Source
AI summary
An autonomous mobile device, in particular an autonomous work device. The device includes at least one device frame; at least one drive unit for generating a propulsion force; at least one detection unit, situated in or at the device frame, for detecting the surroundings of the device frame, the detection unit including at least one synthetic aperture radar sensor; and at least one control or regulation unit for controlling or regulating the drive unit and/or the detection unit. The control or regulation unit is configured to activate the drive unit in such a way that a self-rotation of the device frame about a vertical axis of the device frame to form a circular synthetic aperture takes place with the aid of the synthetic aperture radar sensor.