Vehicle-to-Vehicle RF Detection via SPMT Switch
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Solution Overview
Problem
Current active safety technologies for vehicles, such as ABS and autonomous emergency braking, face challenges in accurately determining the relative positions and distances of nearby vehicles, especially for autonomous driving, due to the limitations of GPS accuracy and existing detection methods.
Innovation Solution
A vehicle-to-vehicle identification and detection system using radio frequency (RF) communication units with a master communication module and SPMT switch, employing time-sharing polling or simultaneous communication schemes to transmit and receive identification information, allowing for precise calculation of distances and relative positions between vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS is used for vehicle positioning, then the system is simple and cost-effective, but the positioning accuracy is insufficient (5 meters) for autonomous driving requirements
Solution Approach 1:
The system divides the positioning task into multiple components: RF communication units for signal exchange, SPMT switch for signal routing, master communication module for coordination, and information processor for calculation. Each component handles a specific aspect of the positioning process, achieving high accuracy through distributed functionality rather than a single complex device.
Solution Approach 2:
The patent introduces RF communication signals as an intermediary medium between vehicles to establish relative position relationships. Instead of relying solely on GPS coordinates, the system uses RF signal transmission and reception as a mediator to calculate distances and positions, achieving centimeter-level accuracy without requiring complex satellite positioning infrastructure.
2Measurement precision
If traditional detection technologies are used for vehicle identification, then the system structure is simple, but the ability to determine relative positions and distances accurately is insufficient
Solution Approach 1:
The RF communication units serve multiple functions: they transmit identification information, establish communication links, measure signal strength for distance calculation, and determine relative positions. This multi-functionality eliminates the need for separate detection devices, achieving high measurement precision without proportionally increasing system complexity.
Solution Approach 2:
The system uses the vehicles' own communication systems to perform detection and positioning functions. The RF communication units inherently capable of transmitting and receiving signals are also used to measure distance and position through signal analysis, making the communication system serve itself for positioning purposes without requiring additional dedicated detection hardware.
3Measurement precision
If multiple RF communication units are deployed for comprehensive vehicle detection, then the measurement accuracy improves, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple RF communication units into a coordinated network where units work together through the SPMT switch and master communication module. Rather than treating each unit as independent, the system merges their capabilities through centralized control and signal routing, achieving comprehensive detection coverage while managing complexity through integration.
Solution Approach 2:
The SPMT switch enables dynamic signal routing between RF communication units, allowing the system to adaptively allocate communication resources based on detection needs. The master communication module dynamically coordinates which units are active and how signals are routed, providing flexibility that reduces the need for permanently active units in all configurations.
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
This system provides accurate and precise positioning of vehicles within an area, supporting active safety control and enabling data requirements for autonomous driving, while being cost-effective and easily installable on various vehicles, including bicycles.
Implementation Method 1
a vehicle (the present vehicle) receives communication requests in the form of radio frequency (RF) signals from nearby vehicles
Data Source
AI summary
A method for vehicle-to-vehicle identification and detection and a system for the same are revealed. A plurality of radio frequency (RF) communication units with different communication directions is arranged at a vehicle body. Each RF communication unit sends identification information of the vehicle to nearby vehicles in response to communication requests from the nearby vehicles. The vehicle sends communication requests to the nearby vehicles in different communication directions by antennas of the RF communication units using time-sharing polling or simultaneous communication scheme. Thus RF communication between vehicles is achieved for identification and detection of the nearby vehicles. The precise and accurate positioning of the respective vehicle within the area is achieved to support vehicle active safety control or provide data required for autonomous driving for improving driving safety.