Tire Casing Life Prediction Using Pressure and Temperature History
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for predicting the remaining life of a retreaded tire casing are inadequate, as they fail to accurately account for varying usage conditions, leading to potential waste of tread rubber and inefficient tire management.
Innovation Solution
A system that includes a tire condition measurement unit, a temperature history estimation unit, a member physical property calculation unit, and a remaining drivable distance prediction unit, which measures internal pressure and temperature history to calculate the physical property values of casing structural members and predict the drivable distance until failure, adjusting for usage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If retreaded tires are used to extend casing life, then cost reduction is achieved, but accurate prediction of remaining casing life becomes difficult
Solution Approach 1:
The system performs preliminary actions by continuously measuring tire condition parameters (internal pressure, temperature) and calculating current physical property values of casing structural members before the casing actually fails. This allows prediction of remaining drivable distance by comparing current values against pre-determined limit values, enabling proactive tire management rather than reactive replacement.
Solution Approach 2:
The system establishes a feedback loop where tire condition measurement units continuously monitor parameters, the server calculates current physical property values based on temperature history and pressure data, compares these against limit values, and provides feedback on remaining casing life. This closed-loop feedback enables dynamic adjustment and accurate prediction of when the casing will reach its physical property limit.
2Loss of information
If inspection methods are used to ascertain casing condition, then some information can be obtained, but accurate remaining life prediction remains difficult
Solution Approach 1:
The system replaces traditional mechanical inspection methods with a electronic sensing and computational approach. Instead of physical inspection of casing condition, the system uses tire condition measurement units to monitor internal pressure and temperature, then uses server-based calculations to determine current physical property values of casing structural members, providing more accurate and continuous information than periodic inspections.
Solution Approach 2:
The system introduces an intermediary computational layer (the server) that processes raw measurement data from tire condition sensors and transforms it into meaningful predictions of casing remaining life. The server calculates current physical property values by integrating temperature history and pressure data, acting as an intermediary between simple sensor readings and complex casing degradation assessment.
3Productivity
If tread rubber is replaced without knowing casing remaining life, then tire can be used, but tread rubber may go to waste if casing fails first
Solution Approach 1:
The system performs preliminary assessment of casing remaining life before tread rubber replacement decisions are made. By calculating current physical property values and comparing them against limit values, the system determines the predicted drivable distance remaining for the casing, allowing users to plan tread replacements in advance and avoid replacing tread rubber unnecessarily when the casing is still viable.
Solution Approach 2:
The system enables self-service tire management by providing users with accurate predictions of casing remaining life and recommended replacement timing. Users can independently make informed decisions about when to replace tread rubber based on the predicted drivable distance, without requiring external expert assessment, thereby optimizing tire utilization and reducing waste.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A system for predicting tire casing life remaining for a casing in a tire, the system including: a tire condition measurement unit that measures one characteristic value including tire internal pressure information indicating at least one of a tire condition and a vehicle running condition; a temperature history estimation unit that estimates a temperature history of at least one location in at least one casing structural member based on the characteristic value; a member physical property calculation unit that calculates at least one current physical property value of the at least one casing structural member that degrades due to tire internal air temperature based on at least the tire internal pressure information and the temperature history; and a remaining drivable distance prediction unit that predicts a drivable distance of the tire until the current physical property value reaches a physical property value limit set in advance.