Virtual Sensor Network for Heterogeneous Vehicle Data Synchronization
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Solution Overview
Problem
The development and verification of intelligent vehicle systems involving heterogeneous sensors are hindered by the need for costly and time-consuming driving tests, as each sensor and algorithm combination requires extensive testing under the same conditions, leading to inefficiencies in the development process.
Innovation Solution
A virtual sensor network system that includes a virtual sensor node for storing and synchronizing sensor data, a master node for controlling and processing this data, and a convergence sensor node for command transfer, allowing for reliable algorithm verification without actual sensor input, using time synchronization and standard protocols to unify sensor interfaces and protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If actual sensor data from heterogeneous sensors is used for algorithm verification, then measurement precision and reliability are improved, but development time and cost increase due to extensive driving tests
Solution Approach 1:
The patent creates virtual sensor nodes that generate synthetic sensor data replicating the characteristics of actual heterogeneous sensors. These virtual copies allow algorithm verification without requiring physical test vehicles and extensive driving tests, thereby maintaining reliability while dramatically reducing development time
Solution Approach 2:
The system performs preliminary data synchronization and calibration by collecting actual sensor data during normal vehicle operation, processing it offline to create synchronized virtual sensor datasets. This preliminary action prepares verification-ready data in advance, eliminating the need for time-consuming real-time driving tests
2Adaptability or versatility
If heterogeneous sensors with different characteristics are integrated, then adaptability and sensor coverage are improved, but device complexity and data processing difficulty increase
Solution Approach 1:
The patent implements a universal time synchronization mechanism that works across all heterogeneous sensor types. The master node coordinates multiple virtual sensor nodes using a common time reference, allowing diverse sensors to be integrated without increasing processing complexity, as they all adhere to the same synchronization protocol
Solution Approach 2:
The master node acts as an intermediary that receives data from multiple heterogeneous virtual sensor nodes, synchronizes their timestamps, and provides a unified time-referenced dataset. This mediator approach simplifies the integration of diverse sensors by handling the complexity of coordination centrally
3Measurement precision
If driving verification is performed for each sensor and algorithm combination, then measurement precision under same conditions is improved, but productivity and development efficiency decrease
Solution Approach 1:
The system creates virtual test environments using synthesized sensor data that replicates real-world conditions. This allows multiple algorithm-sensor combinations to be verified efficiently against the same standardized virtual test cases, maintaining verification accuracy while enabling parallel testing and significantly improving development throughput
Data Source
AI summary
A virtual sensor network system is provided that includes a virtual sensor node that stores sensor data collected from a sensor mounted within a vehicle in time synchronization therewith and provides the stored sensor data in time synchronization therewith, in addition, a master node performs a control on the virtual sensor node and executes an algorithm used in an intelligent vehicle using the sensor data. The master node receives the sensor data stored in the virtual sensor node as the virtual sensor data in time synchronization therewith, without inputting actual sensor data from the sensor mounted within the vehicle when executing the algorithm.