Tire Testing Phase Calculation Using Reference Point Detection

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Solution Overview

Problem

Existing tire testing methods require precise positioning of a reference point before detecting a singular point, necessitating expensive and complex components like servo motors, which increases costs and complicates the process.

Innovation Solution

A tire testing method and device that apply a lubrication solution to a tire's bead while rotating, detect the phase of a reference point and spindle origin, calculate the phase from the reference point to the singular point, and mark the tire at the singular point location, using a two-dimensional code as a reference point and inexpensive components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If precise positioning of the reference point is implemented before detecting the singular point, then measurement precision is improved, but device complexity and cost increase due to requiring servo motors

Engineering Contradiction:

Improvephase calculation precisionVSAvoidpositioning system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The reference point is detected and its phase is recorded before the tire mounting process. This preliminary detection allows the system to know the reference point's initial position, eliminating the need for complex real-time positioning during the test. The phase information is stored and used later for calculating the singular point's position relative to the reference point.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex mechanical positioning systems (servo motors) with a phase calculation method. Instead of mechanically positioning the reference point to a fixed location, the system detects the reference point's phase, records it, and uses mathematical calculation to determine the singular point's position. This substitution of mechanical systems with detection and calculation systems reduces device complexity while maintaining measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If precise positioning of the reference point is implemented before detecting the singular point, then measurement precision is improved, but manufacturing cost increases due to expensive components

Engineering Contradiction:

Improvephase calculation precisionVSAvoidmanufacturing cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent uses simple, inexpensive components such as sensors for detecting the reference point and spindle rotation detection, replacing expensive servo motors. The system relies on detecting phase information and performing calculations rather than using costly positioning hardware. This approach maintains measurement precision while significantly reducing manufacturing costs.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent replaces expensive mechanical positioning systems with detection and calculation systems. Instead of using servo motors that cost thousands of dollars, the system uses simple sensors to detect the reference point's phase and calculates the singular point's position mathematically. This substitution dramatically reduces manufacturing costs while maintaining or even improving measurement precision through phase calculation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If the reference point is not precisely positioned, then device complexity is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvepositioning system complexityVSAvoidsingular point position accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The system detects the reference point's phase, records it as feedback information, and uses this feedback to calculate the singular point's position. The phase difference between the reference point and the singular point is computed based on the recorded reference phase and the detected singular point position, providing accurate measurement without requiring precise mechanical positioning.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces mechanical positioning precision requirements with mathematical calculation precision. Instead of relying on mechanical systems to position the reference point accurately, the system uses sensors to detect the reference point's phase and performs phase difference calculations. This substitution allows the use of simple, non-positioning components while achieving high measurement precision through computational methods.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11274993B2Tire testing method and tire testing device for locating a position on a tire based on a reference point on the tire and a rotation origin of a spindle

Publication Date: 2022.03.15 KOBE STEEL LTD

AI summary

A tire testing method includes: applying a lubrication solution to a bead part of a tire; detecting a phase of a reference point of the tire; detecting a phase of a rotation origin of a spindle at common coordinates shared with coordinates at which the phase of the reference point is indicated; detecting a singular point present on the tire by conducting a tire test while rotating the tire on the spindle, and detecting a phase from the rotation origin to the singular point; calculating a phase from the reference point to the singular point based on the phase of the reference point, the phase of the rotation origin, and the phase from the rotation origin to the singular point; storing information about the reference point and information about the rotation origin at the common coordinates; and marking the tire at a position where the singular point is present.