Vehicle Wheel Unit Localization via Mobile RF Signal Analysis
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Solution Overview
Problem
Existing wheel information systems struggle to accurately identify and localize wheel units on a vehicle using mobile communication devices without access to the vehicle's data communication bus, as they lack the necessary operational parameters for learning and localization tasks.
Innovation Solution
A method and system utilizing a mobile communication device with RF communication capabilities, such as a smartphone, to detect wheel units by measuring RF signal strengths around the vehicle, analyzing peak shapes and positions, and identifying wheel units and their mounting positions based on signal patterns, enabling bidirectional communication for improved reliability and data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mobile communication device is used to detect wheel units without access to vehicle data communication bus, then the system can operate independently and provide off-vehicle processing capabilities, but the device lacks access to operational parameters needed for accurate learning and localization
Solution Approach 1:
The patent introduces an intermediary approach by using a mobile communication device as a standalone detector that communicates with wheel units directly via RF signals. This mediator device performs learning and localization tasks independently without needing access to the vehicle's internal data communication bus, thus resolving the contradiction between independence and accuracy by creating a new communication pathway.
Solution Approach 2:
The patent replaces the traditional mechanical/electrical connection to vehicle sensors with wireless RF communication. Instead of accessing operational parameters through physical connections to the vehicle's data bus, the mobile device uses radio frequency signals to detect and identify wheel units, substituting a wireless communication mechanism for the traditional wired sensor access system.
2Device complexity
If RF signal strength measurement is used for wheel unit localization, then the system can identify wheel mounting positions without additional sensors, but signal strength variations may lead to identification errors
Solution Approach 1:
The patent applies preliminary action by having the mobile communication device move along a predetermined path around the vehicle before performing localization. This pre-positioning and systematic movement allows the device to collect RF signal strength data from multiple positions, enabling more reliable identification of wheel units and their mounting positions through pattern recognition rather than relying on a single measurement point.
Solution Approach 2:
The system uses feedback by continuously measuring RF signal strengths at different positions along the path and using this information to identify and confirm wheel unit locations. The measured signal strengths provide feedback that helps distinguish between different wheel units and their mounting positions, improving localization reliability through iterative measurement and recognition.
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
Enables effective identification and localization of wheel units on a vehicle using a mobile device, improving reliability and allowing for off-vehicle processing of wheel information, even without access to the vehicle's internal sensors, by leveraging signal strength analysis and user input for path tracking.
Implementation Method 1
wheel units, i.e. electronic modules that are placed at one or more wheels of the respective vehicle and are configured to send RF signals, and a receiver that is placed in the vehicle and is suitable for receiving the RF signals from the wheel units
Data Source
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AI summary
A method for detecting wheel units (10-1 to 10-4) mounted at wheels (W1-W4) of a vehicle (1) and for detecting wheel mounting positions (FL, FR, RL, RR) belonging to each of the wheel units (10-1 to 10-4) is disclosed. The method comprises the steps of: (a) positioning a mobile communication device (50) at a predetermined start position (52) with respect to the vehicle (1), (b) moving the mobile communication device (50) from the start position (52) along a path (54) around the vehicle (1), (c) receiving RF signals (R1-R4) from the wheel units (10-1 to 10-4) and measuring the RF signal strengths (RSSI) thereof by the mobile communication device (50) when moving along the path (54) around the vehicle (1), (d) performing an analysis of variations of the measured RF signal strengths (RSSI) of the received RF signals (R1-R4) depending on the position of the mobile communication device (50) along the path (54), (e) identifying the wheel units (10-1 to 10-4) and identifying the wheel mounting positions (FL, FR, RL, RR) based on a result of the analysis.