Tire Testing Chamber Volume Control for Turbulence-Free Pressure Changes
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Solution Overview
Problem
Conventional tire testing apparatuses using negative pressure pumps suffer from air turbulence, poor image quality, longer testing times, and high energy consumption due to air flow issues and inexact pressure control.
Innovation Solution
A testing apparatus that changes the volume of the testing chamber using a movable wall element to control pressure, excluding air from the surroundings, allowing for precise pressure control and reduced air movements, and incorporates an energy recovery unit to enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a negative pressure pump is used to generate negative pressure in the testing chamber, then the pressure can be changed, but air turbulence occurs leading to movements of the measurement object and poorer image quality
Solution Approach 1:
The patent removes the harmful air flow generation method (pump) from the system and replaces it with a volume change mechanism (movable wall element) that achieves pressure change without introducing air turbulence, thereby eliminating the source of measurement object movement and image quality degradation
Solution Approach 2:
The patent replaces the pneumatic system (pump and pipelines) with a mechanical volume change system (movable wall element driven by actuator), substituting a mechanism that directly changes chamber volume rather than moving air, thereby eliminating air turbulence while achieving pressure control
2Stress or pressure
If a negative pressure pump is used to generate negative pressure, then pressure change is achieved, but settling times are necessary leading to longer testing times
Solution Approach 1:
The movable wall element can be positioned in advance to achieve the desired pressure state without requiring gradual pressure adjustment and settling time, as the volume change directly establishes the target pressure condition immediately
Solution Approach 2:
The patent replaces the gradual pressure adjustment process of a pump with direct mechanical volume change, eliminating the need for settling time while achieving the same pressure change objective
3Stress or pressure
If a negative pressure pump is used, then pressure control is achieved, but exact control of the negative pressure profile is not possible
Solution Approach 1:
The patent incorporates pressure sensors and control units that monitor the actual pressure and adjust the movable wall element position to achieve the desired pressure profile, enabling precise control through closed-loop feedback
Solution Approach 2:
The movable wall element system allows dynamic adjustment of chamber volume with precise control over the pressure change rate and profile, enabling exact pressure control trajectories that were not achievable with pump-based systems
4Stress or pressure
If a negative pressure pump is used, then pressure change is achieved, but high noise level and high energy consumption occur
Solution Approach 1:
The patent replaces the high-energy-consuming pump system with a mechanical volume change system using a movable wall element, which requires significantly less energy to achieve the same pressure change by altering chamber volume rather than moving large volumes of air
Solution Approach 2:
The patent converts what would be waste energy in a pump system (energy spent moving air) into useful work by directly changing the chamber volume, thereby eliminating energy waste while achieving pressure control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves image quality, reduces testing time, and lowers energy consumption and noise emissions by minimizing air turbulence and optimizing pressure control, while also enabling efficient energy recovery.
Implementation Method 1
the pressure loading unit changes the volume of the testing chamber while excluding air from the surroundings
Implementation Method 2
the pressure loading unit includes a wall element of the testing chamber which is movable with respect to the testing chamber structure and by the movement of which the volume of the testing chamber can be changed
Data Source
AI summary
A testing apparatus, in particular a tire testing apparatus, includes a testing chamber, a pressure loading unit for changing the pressure in the testing chamber and at least one measuring head for measuring a measurement object arranged in the testing chamber at different pressure values produced by the pressure loading unit. It is provided here that, for changing the pressure in the testing chamber, the pressure loading unit changes the volume of the testing chamber while excluding air from the surroundings.