Hyper Temporal Lidar Pulse Burst Scheduling
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Solution Overview
Problem
Lidar systems face challenges in operating with low latency and rapid adaptation to environmental changes, particularly in automotive applications where high-speed movement requires rapid decision-making, and the laser source's energy management is critical to avoid overheating and ensure consistent energy delivery during variable firing rates.
Innovation Solution
A transient laser energy model and transient mirror motion model are used to predict and manage energy and motion over short time intervals, allowing for precise scheduling of laser pulses and mirror positioning, enabling high-rate, low-latency operation with intelligent targeting and adaptive detection intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the laser source fires at high density to reduce latency and respond rapidly to detected objects, then the response speed and measurement precision are improved, but the laser source overheating and energy management problems worsen
Solution Approach 1:
The system performs preliminary actions by modeling the laser source's energy and thermal states before high-density firing sequences occur. The transient laser energy model predicts future energy availability, and the thermal model anticipates temperature rise, allowing the controller to pre-adjust firing schedules or insert cooling periods before critical thermal thresholds are reached.
Solution Approach 2:
The system dynamically adjusts the laser firing rate and pulse duration based on real-time feedback from the thermal model and energy model. When temperature or energy constraints are detected, the system adaptively reduces firing density or modifies pulse parameters, creating a dynamic balance between response speed and thermal management.
2Adaptability or versatility
If the laser source operates at variable firing rates to adapt to different detection needs, then the adaptability is improved, but the energy management complexity and risk of overheating increase
Solution Approach 1:
The system implements feedback mechanisms where the transient laser energy model and thermal model continuously monitor and predict the laser source's state. The controller uses this feedback to automatically adjust firing rates and pulse parameters, creating a closed-loop system that manages energy and temperature while maintaining adaptability to different detection requirements.
Solution Approach 2:
The system changes operational parameters such as pulse duration, firing rate, and pulse energy based on the current state predicted by the energy and thermal models. This allows the laser source to adapt to varying detection needs while staying within safe operational limits through parameter modulation rather than fixed-rate operation.
3Measurement precision
If the lidar system uses transient laser energy modeling to schedule pulses with high precision, then the measurement precision and energy management are improved, but the computational complexity and processing time increase
Solution Approach 1:
The system segments the laser operation into discrete time intervals and uses simplified transient models for each interval rather than requiring a single complex comprehensive model. This segmentation allows the controller to manage computational complexity by processing energy and thermal states in manageable time steps, while still achieving high precision pulse scheduling.
Data Source
AI summary
A lidar system includes a lidar transmitter and a control circuit. The lidar transmitter can controllably fire a plurality of laser pulse shots into a field of view, and the control circuit can (1) detect a target based on a return from a laser pulse shot fired at a first shot angle, and (2) in response to the detected target, (i) schedule a pulse burst to be fired at the target, wherein the pulse burst comprises a second laser pulse shot to be fired at a second shot angle and a third laser pulse shot to be fired at a third shot angle, wherein the first shot angle is between the second and third shot angles, and (ii) control the lidar transmitter to fire the scheduled pulse burst.