Wheel Assembly ID Identification Using Angle Range Segmentation
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Solution Overview
Problem
Existing tire condition monitoring systems struggle to accurately identify the wheel assembly to which each transmitter is attached, especially when the vehicle is traveling on bad roads due to deviations in transmission angles from specific angles.
Innovation Solution
A receiver and transmitter unit configuration that divides possible rotation angles into equal parts, assigns rotation angles to these ranges, and identifies the wheel assembly based on the frequency of transmission data receipt, using ID codes and angle differences to associate transmission data with the correct wheel assembly, even under varying road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the transmitter transmits data at a specific rotation angle, then the identification accuracy is improved, but the transmission angle deviates on bad roads causing identification failure
Solution Approach 1:
The patent divides the rotation angle into multiple equal angle ranges (first angle range, second angle range, etc.) instead of using a single specific angle for transmission. This segmentation allows the system to handle angle deviations by distributing transmission opportunities across multiple ranges, thereby maintaining identification reliability even when the transmission angle deviates from the specific angle due to bad road conditions.
Solution Approach 2:
The patent changes the parameter of transmission angle from a fixed specific angle to multiple possible angle ranges. By defining multiple angle ranges with different weights and adjusting the transmission probability based on the detected angle's position within these ranges, the system adapts to varying road conditions while maintaining accurate wheel assembly identification.
2Reliability
If multiple angle ranges are used to handle deviation, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the rotation angle into multiple equal angle ranges that are systematically defined based on the specific angle and a predetermined angle. This segmentation approach provides a structured and manageable way to handle angle deviations without requiring complex algorithms, as each range can be processed independently with predetermined weights.
Solution Approach 2:
The patent performs preliminary classification of the detected rotation angle into one of multiple angle ranges before transmission decision-making. This preliminary action simplifies the subsequent processing by pre-determining which angle range the detected angle falls into, allowing the system to efficiently select appropriate transmission parameters without complex real-time calculations.
Data Source
Figure 1A~1B
Figure 2~4
Figure 5A~6
AI summary
A reception control section obtains the rotation angles of wheel assemblies when receiving transmission data by a reception circuit. The reception control section divides 360°, which is the range of the possible rotation angles of the wheel assembly, into equal parts to obtain angle ranges and assigns each of the obtained rotation angles to one of angle ranges. The reception control section derives the angle range in which the number of times (frequency) the obtained rotation angles are included is a maximum value. The reception control section calculates a reception-side angle difference, which is the difference between the median values of the angle ranges in which the number of times the obtained rotation angle is included is a maximum value. The reception control section associates the ID codes with the wheel assemblies based on the correspondence between the reception-side angle difference and the angle difference between specific angles.