Vehicle Sensor Data Collection via Optical Fiber Synchronization
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Solution Overview
Problem
The existing vehicle driving data collection methods face challenges with slow transmission rates, bandwidth bottlenecks, data compression delays, electromagnetic interference, and increased weight and cost due to the use of copper cables for data transmission.
Innovation Solution
Utilizing optical fiber for high-speed data transmission, employing orthogonal frequency-division multiplexing (OFDM) for control signals, and synchronizing data with time stamps to enhance data collection and processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If copper cables are used for data transmission, then electromagnetic compatibility is achieved, but transmission rate is limited and bandwidth is bottlenecked
Solution Approach 1:
The patent replaces traditional copper cable electrical signal transmission with optical fiber optical signal transmission. This substitution eliminates electromagnetic interference inherent in copper cables while providing significantly higher bandwidth and transmission rates, directly resolving the contradiction between transmission speed and electromagnetic compatibility.
2Productivity
If data is compressed before transmission, then bandwidth usage is optimized, but data delay increases
Solution Approach 1:
The patent extracts and eliminates the data compression step from the transmission process. By transmitting raw uncompressed sensor data directly through optical fiber, the system avoids compression delays while the high bandwidth of optical fiber compensates for the increased data volume, resolving the contradiction between bandwidth efficiency and transmission delay.
3Loss of information
If multiple sensors are installed to collect comprehensive driving data, then information completeness is improved, but transmission requirements and system complexity increase
Solution Approach 1:
The patent implements a universal optical fiber transmission infrastructure that handles all sensor data types (cameras, radar, LIDAR, etc.) through a single high-bandwidth channel. This multi-functional transmission system replaces multiple specialized copper cable connections, reducing system complexity while supporting comprehensive multi-sensor data collection.
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
Optical fiber transmission enables high bandwidth, reduced data delay, retention of original information details, immunity to electromagnetic interference, and reduced weight and volume, facilitating advanced autonomous driving capabilities.
Implementation Method 1
transmit uncompressed digital signal to the vehicle central processor through an optical fiber
Implementation Method 2
sending, by a vehicle central processor, a data collection instruction and a synchronization clock signal to each onboard sensor
Implementation Method 3
synchronize the collected vehicle driving data and environmental data according to the time stamp
Data Source
AI summary
The present disclosure provides a method and system for vehicle driving data collection. The method includes: sending, by a vehicle central processor, a data collection instruction and a synchronization clock signal to each onboard sensor, wherein the data collection instruction is a control signal for the sensor to be turned on or off; converting vehicle driving data and environmental data collected by the onboard sensor into a digital signal, adding a time stamp to the collected vehicle driving data and environmental data, and transmitting uncompressed digital signal to the vehicle central processor through an optical fiber; and synthesizing, by the vehicle central processor, the collected vehicle driving data and environmental data, and synchronizing the collected vehicle driving data and environmental data according to the time stamp, to obtain a driving state of the vehicle.