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Laser Pulse-Driven Multi-Sensor Time Synchronization Method for LiDAR Systems.

Jiazhi Yang^1,2,3, Xingguo Han^1,2,3, Wenzhong Deng^1,2,3

¹Guangxi Region Precious Metal Materials Advanced Process Research Center, Guilin University of Aerospace Technology, Guilin 541004, China.

Sensors (Basel, Switzerland)

|December 31, 2025

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This summary is machine-generated.

This study introduces a novel laser pulse-driven time synchronization (LPTS) method for multi-sensor systems. LPTS improves timing accuracy to 0.1 μs, overcoming limitations of Global Navigation Satellite System (GNSS) synchronization.

Area of Science:

Sensor Fusion and Data Integration
Precision Measurement and Metrology
Optical Sensing Technologies

Background:

Multi-sensor systems demand precise time synchronization for effective data fusion.
Current Global Navigation Satellite System (GNSS) synchronization methods lack accuracy and are susceptible to signal interference.
Existing methods often rely on external, potentially unreliable, time references.

Purpose of the Study:

To introduce and evaluate a novel laser pulse-driven time synchronization (LPTS) method for Light Detecting and Ranging (LiDAR) systems.
To address the limitations of traditional time synchronization methods in multi-sensor applications.
To enhance the accuracy and reliability of time synchronization without external hardware dependencies.

Main Methods:

Keywords:

LiDAR MCU laser pulse driven multi-sensor time synchronization

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Development of a custom LiDAR system incorporating the LPTS method.
Utilizing electrical pulses synchronized with laser beams to drive Micro-Controller Unit (MCU) timers.
Implementing interpolation techniques for precise data synchronization with laser pulses.
Comparative experimental analysis of LPTS against traditional time synchronization (TRTS) methods.

Main Results:

The LPTS method achieves a timing accuracy of 0.1 μs.
LPTS eliminates reliance on external time references like GNSS, mitigating signal dependency issues.
The method minimizes laser jitter originating from third-party time sources.
Internal time synchronization resolution is enhanced to 0.1 μs, significantly improving relative timing precision.

Conclusions:

The novel LPTS method offers a robust and accurate solution for time synchronization in multi-sensor systems, particularly within LiDAR applications.
LPTS circumvents the drawbacks of GNSS-based synchronization, providing superior performance and reliability.
The technique enhances internal timing precision and reduces susceptibility to external timing interferences without additional hardware.