Adaptive LIDAR Rotation Cycle for Vehicle Speed Control
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Solution Overview
Problem
Conventional LIDAR systems on vehicles face challenges in quickly acquiring detailed information about objects, especially at high speeds, and in situations like approaching stop lines or intersections, where detection timing is critical for safety.
Innovation Solution
A vehicle control system that adjusts the rotational cycle of the LIDAR based on vehicle speed, positional information, and map data, allowing for adaptive operation modes such as shorter cycles when approaching stop lines or intersections, and deceleration control to enhance detection timing and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the LIDAR rotates continuously at high speed, then detailed information of objects can be acquired quickly, but the detection timing is delayed when the vehicle is traveling at high speed
Solution Approach 1:
The LIDAR rotational speed is made dynamic rather than fixed. The controller adjusts the rotational cycle based on vehicle speed: using longer cycles at high speeds and shorter cycles at low speeds or in critical situations, allowing the system to adapt its detection strategy to current operating conditions
Solution Approach 2:
The rotational cycle parameter of the LIDAR is changed based on vehicle speed and detection needs. By varying the cycle length according to vehicle speed and situational context, the system optimizes the balance between detection timing and information quality
2Loss of time
If the LIDAR uses a longer rotational cycle at high vehicle speeds, then detection timing is improved, but detailed information acquisition is delayed
Solution Approach 1:
The system performs preliminary detection at longer cycles when appropriate, then switches to shorter cycles for detailed information acquisition when needed. This allows initial object detection to occur earlier while maintaining the capability to gather detailed information subsequently
Solution Approach 2:
The LIDAR operates with periodic rotational cycles that can be adjusted between long and short durations. The controller implements periodic detection patterns that alternate between survey-mode (longer cycle) and detail-mode (shorter cycle) based on vehicle speed and detection requirements
3Measurement precision
If the LIDAR uses a shorter rotational cycle, then detailed information is acquired quickly, but energy consumption increases
Solution Approach 1:
The system uses shorter rotational cycles partially or selectively rather than continuously. Short cycles are employed only when detailed information is actually needed (e.g., when objects are detected or in critical situations), while longer cycles are used during normal cruising, reducing overall energy consumption while maintaining detection capability
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
Enables earlier detection of objects, improving safety by adjusting LIDAR rotation speed and cycle according to vehicle speed and environmental conditions, ensuring timely detection of objects at high speeds and in critical areas.
Implementation Method 1
a LIDAR (Laser Imaging Detection and Ranging) is mounted on a vehicle... The LIDAR includes a laser, a movable mirror, a rotating table and a photodetector. The laser emits light. The movable mirror reflects light emitted from the laser
Implementation Method 2
The movable mirror reflects light emitted from the laser (hereinafter also referred to as 'laser beam') to irradiate surrounding environment. The photodetector detects the light reflected from the surrounding environment
Data Source
AI summary
The vehicle control system comprises a vehicle speed acquisition device, a rotary-typed LIDAR and a controller. The vehicle speed acquisition device is configured to acquire traveling speed of a vehicle. The LIDAR is configured to acquire surrounding information of the vehicle using a laser beam. The controller is configured to control a rotational movement of the LIDAR. The controller is configured to execute processing to set a cycle of the rotational movement based on the traveling speed. In the setting processing, the controller is configured to set the cycle during the traveling speed is relatively fast to a longer cycle than that during the traveling speed is relatively slow.