Tire Pressure Monitoring Mode Switching Decay Timer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Tire pressure monitoring devices consume excessive energy due to frequent switching to high-frequency monitoring modes, even for minor pressure changes, which reduces their service life and efficiency.
Innovation Solution
Implementing a method with two operating modes: an energy-saving mode for regular pressure measurements without transmission and a more energy-intensive mode for frequent measurements and transmission, using timers and reference values to differentiate between rapid and minor pressure changes, thereby preventing unnecessary mode switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system switches to high-frequency monitoring mode whenever pressure change exceeds 100 mbar, then rapid pressure changes can be detected, but energy consumption increases significantly due to frequent unnecessary mode switches
Solution Approach 1:
The patent applies dynamics by making the monitoring frequency adaptive rather than static. The system dynamically adjusts between low-frequency and high-frequency monitoring modes based on actual pressure change conditions. The key innovation is introducing a decay time parameter that prevents premature mode switching by ensuring pressure changes persist beyond a threshold for a specified duration, thereby reducing false activations while maintaining rapid detection capability when genuine rapid pressure changes occur.
2Weight of moving object
If the system uses smaller energy storage capacities for weight reduction, then system weight decreases, but service life is reduced due to insufficient energy for frequent high-frequency monitoring
Solution Approach 1:
The patent applies periodic action by implementing intermittent monitoring rather than continuous high-frequency monitoring. The system operates in cycles, switching between energy-saving low-frequency mode and energy-intensive high-frequency mode based on detected pressure change conditions. This periodic activation of high-frequency monitoring, controlled by the decay time parameter, allows the system to maintain detection capability while significantly reducing overall energy consumption, thereby extending service life with smaller battery capacities.
3Reliability
If the system monitors tire pressure continuously at high frequency, then rapid pressure changes are detected immediately, but energy is wasted during minor pressure changes like tire cooling
Solution Approach 1:
The patent applies preliminary action by implementing a pre-switching verification step using the decay time parameter. Before activating high-frequency monitoring mode, the system checks whether the pressure change persists for the specified decay time duration. This preliminary verification prevents premature mode switching caused by transient pressure fluctuations, such as those during normal tire cooling, thereby eliminating energy waste while maintaining the ability to detect genuine rapid pressure changes reliably.
Data Source
Figure 1
AI summary
A method for actuating an operating mode of a tyre-pressure-monitoring device, wherein the tyre-pressure-monitoring device is mounted on a wheel of a vehicle and has a pressure-measuring device and a transmitting device for transferring pressure measurement data by radio. The tyre-pressure-monitoring device can assume at least two operating modes, wherein in a first operating mode tyre pressure is repeatedly measured at first time intervals, and in a second operating mode the tyre pressure is measured at second time intervals, wherein the second time intervals are shorter than the first time intervals, and wherein in the second operating mode pressure measurement data is emitted by the tyre-pressure-monitoring device. When the first operating mode is entered, a first reference value is calculated from previously output pressure values and stored. A timer is started which monitors a time interval up to a first predefined decay period, and after the expiry of the decay period the pressure value measured last is stored as the first reference value.