LiDAR Angular Resolution Control for Power and Range Optimization
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Solution Overview
Problem
Existing mechanical lidars have fixed uniform angular resolution along the horizontal direction, which is inadequate for varying application scenarios, leading to increased power consumption, limited detection range, and difficulty in meeting customization requirements.
Innovation Solution
A lidar system with a non-uniform angular resolution along the horizontal direction is achieved by controlling the emission frequencies of multiple laser emitters, adjusting their frequencies based on different horizontal fields of view and application scenarios, such as vehicle orientation and detected obstacles, to optimize detection density and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If uniform angular resolution is used along the horizontal direction, then the detection coverage is comprehensive, but the power consumption increases and detection range is limited
Solution Approach 1:
The patent applies local quality by setting different angular resolutions for different horizontal fields of view. Specifically, the lidar uses a first angular resolution in a first horizontal field of view and a second angular resolution in a second horizontal field of view, where the first angular resolution is smaller than the second angular resolution. This allows the system to concentrate detection resources in critical areas while reducing resources in less critical areas, thereby reducing overall power consumption while maintaining adequate detection range.
Solution Approach 2:
The patent implements dynamic adjustment of angular resolution based on detection requirements. The control unit dynamically switches between different angular resolutions for different horizontal fields of view according to the detection needs, making the system adaptable to varying operational conditions rather than using a fixed uniform resolution throughout.
2Adaptability or versatility
If fixed angular resolution is used, then the system structure is simple, but it cannot meet customization requirements for different application scenarios
Solution Approach 1:
The patent makes the angular resolution dynamic and adjustable based on different application scenarios. The control unit is configured to set different angular resolutions for different horizontal fields of view according to detection requirements, allowing the system to be customized for various applications without changing the physical structure.
Solution Approach 2:
The patent changes the operational parameters (angular resolution values) of the lidar system to meet different customization requirements. By adjusting the angular resolution parameters for different horizontal fields of view, the system can be adapted to various application scenarios without modifying the hardware structure, thus achieving customization while maintaining structural simplicity.
3Measurement precision
If all laser emitters operate at the same frequency, then the control is simple, but the detection density cannot be optimized for different regions
Solution Approach 1:
The patent applies local quality by assigning different emission frequencies to laser emitters in different horizontal fields of view. The control unit sets a first emission frequency for laser emitters in the first horizontal field of view and a second emission frequency for laser emitters in the second horizontal field of view. This allows optimization of detection density in specific regions while keeping the control mechanism relatively simple.
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 approach reduces power consumption, maximizes limited flight time, and enhances the detection range by dynamically adjusting the angular resolution according to specific scenarios, improving the lidar's ability to detect obstacles and environment effectively.
Implementation Method 1
a emitting unit including a plurality of laser emitters, the plurality of laser emitters being configured to emit laser beams for detecting a target object
Implementation Method 2
receiving echoes of the emitted laser beams reflected by a target object
Data Source
AI summary
A detection method (100) of a lidar (200), the lidar (200), and a system for a vehicle (300) including the same. The lidar (200) is capable of rotating around a rotating shaft, and includes an emitting unit (210) having a plurality of laser emitters (211). The detection method (100) includes: step S101, controlling the plurality of laser emitters (211) to emit laser beams for detection so that the lidar (200) has a non-uniform angular resolution along a horizontal direction; step S102, receiving echoes of the emitted laser beams for detection reflected by a target object and converting the echoes into electrical signals; and step S103, calculating a distance and/or reflectivity of the target object according to the electrical signals. Thereby, an angular resolution along a horizontal direction of the lidar (200) is flexibly configured, flight time and power consumption are reduced, and a detection range of the lidar (200) is improved.