Tire Pressure Monitoring with Auto-Scaling Resolution
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Solution Overview
Problem
Existing tire pressure monitoring systems require multiple units for different vehicle applications and pressure ranges, leading to increased complexity and costs in stocking and maintenance, as well as potential for false readings due to inadequate pressure range adjustments.
Innovation Solution
A tire pressure monitoring wheel unit capable of operating in multiple pressure ranges, automatically switching between them based on detected pressure thresholds, and transmitting signals to a control unit for user notification, reducing the need for multiple units and enhancing precision with adjustable scaling factors and offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single tire pressure monitoring unit is used for multiple pressure ranges, then device complexity and stocking requirements are reduced, but measurement precision may deteriorate due to inadequate pressure range adjustments
Solution Approach 1:
The system dynamically adjusts the pressure range based on detected tire pressure levels. The control unit automatically switches between first and second pressure ranges depending on whether pressure is below or above a threshold, allowing a single unit to adapt to different measurement conditions and maintain precision across varying pressure levels
Solution Approach 2:
The system changes the measurement parameters (pressure range and scaling factor) based on the detected pressure level. By switching between different pressure ranges and adjusting the scaling factor accordingly, the system maintains measurement precision across a wide pressure spectrum without requiring multiple specialized units
2Ease of operation
If pressure range thresholds are not automatically adjusted, then device operation is simpler, but false readings occur due to inadequate pressure range adaptations
Solution Approach 1:
The system performs self-adjustment by automatically detecting tire pressure and switching between pressure ranges without user intervention. The control unit autonomously determines when to switch ranges based on detected pressure levels, eliminating the need for manual configuration while ensuring accurate readings across different pressure conditions
Solution Approach 2:
The system uses feedback from pressure sensor readings to automatically adjust the pressure range. The control unit continuously monitors pressure levels and switches ranges based on whether readings exceed thresholds, creating a closed-loop system that maintains reliability without requiring user input
3Adaptability or versatility
If multiple pressure ranges are supported with automatic switching, then adaptability to different vehicle applications is improved, but device complexity increases due to range switching mechanisms
Solution Approach 1:
The system achieves multi-functionality by incorporating multiple pressure ranges within a single monitoring unit. The ability to switch between first and second pressure ranges allows the same device to serve different vehicle applications (passenger vehicles, heavy duty vehicles, dual placard vehicles) without requiring separate specialized units
4Measurement precision
If pressure data is transmitted with high resolution scaling, then measurement precision is improved, but data transmission volume increases
Solution Approach 1:
The system dynamically changes the scaling factor parameter based on the detected pressure range. In the first pressure range, a first scaling factor is applied, and in the second pressure range, a second scaling factor is applied. This adaptive approach maintains measurement precision while optimizing data transmission by using appropriate resolution levels for each pressure range
Data Source
AI summary
The present disclosure relates to methods, system and devices for monitoring tire pressure data of vehicle wheel units. In an example a method of monitoring and expressing tire pressure data information is provided. The method includes selecting a first threshold pressure value for a tire to establish a first pressure range and a second pressure range. The method also includes monitoring pressure of the tire and generating signals indicative of tire pressure. The method further includes that in the first pressure range the signals are converted to digital signals according to a first conversion variable and in the second pressure range the signals are converted according to a second conversion variable.