Vehicle Data Fusion Device for GPS-Denied Communication
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Solution Overview
Problem
Current vehicle architectures are limited in their ability to effectively distribute and process data from various sensors for vehicle-to-vehicle communication, particularly in scenarios where GPS signals are unavailable, and they lack an integrated solution for fusing and filtering sensor data for reliable communication.
Innovation Solution
A vehicle electrical system with a device for distributing data, featuring a fusion device that combines and filters sensor data from position and steering angle sensors, and a Car2X antenna for wireless communication, enabling the generation of reliable data for vehicle-to-vehicle communication even without GPS signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor data is transmitted directly from individual sensors to communication interfaces, then data transmission is simple, but data reliability and consistency deteriorate when GPS signals are unavailable
Solution Approach 1:
The patent merges multiple sensor data sources (GPS receiver, inertial sensors, wheel speed sensors, steering angle sensors) into a single centralized evaluation unit. This fusion device consolidates data from various sensors to generate reliable position and movement data even when GPS signals are unavailable, thereby improving data reliability while managing device complexity through centralized processing.
Solution Approach 2:
The evaluation unit acts as an intermediary between individual sensors and the communication interface. It receives raw data from multiple sensors, processes and fuses this data to generate reliable position and movement information, then transmits the processed data to the communication interface. This intermediary layer ensures data consistency and reliability without requiring complex changes at each sensor level.
2Adaptability or versatility
If multiple sensor data sources are used for vehicle-to-vehicle communication, then data availability improves, but data processing and fusion complexity increases
Solution Approach 1:
The evaluation unit performs multiple functions: it processes GPS data, inertial sensor data, wheel speed data, and steering angle data; it generates position data, movement data, and derived parameters; it maintains data availability across different communication protocols. This multi-functional design improves data availability while consolidating processing complexity into a single universal unit rather than distributing complexity across multiple specialized systems.
3Measurement precision
If GPS-dependent communication systems are used, then position accuracy is high, but system reliability deteriorates in GPS-denied environments
Solution Approach 1:
The system preliminarily establishes alternative data sources (inertial sensors, wheel speed sensors, steering angle sensors) that can be activated when GPS signals are unavailable. The evaluation unit is pre-configured to process multiple sensor types and switch between GPS-based positioning and sensor-fusion-based positioning, ensuring continuous reliable operation without sacrificing position accuracy even in GPS-denied environments.
Solution Approach 2:
The system changes operational parameters dynamically: when GPS signals are available, it uses GPS-based positioning for high accuracy; when GPS signals are unavailable, it transitions to sensor-fusion-based positioning using inertial sensors, wheel speed sensors, and steering angle sensors. This parameter change approach maintains both position accuracy and system reliability across different operating conditions.
Data Source
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AI summary
A device for distributing data about a vehicle, has a first sensor data reception interface for receiving first sensor data from a first sensor, a second sensor data reception interface for receiving second sensor data from a second sensor, and a transmission interface for transmitting the data about the vehicle on the basis of the first sensor data and the second sensor data to a receiver. A vehicle and an on-board system which incorporate the devise are also encompassed herein.