Dual-purpose Calibration System for Optical Pressure Sensitive Paint
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Solution Overview
Problem
Current optical pressure sensitive paint (PSP) calibration systems face incompatibility between static and dynamic calibration modes, making it impossible to obtain high-precision static and dynamic characteristic parameters while considering temperature influences.
Innovation Solution
A dual-purpose calibration system for optical pressure sensitive paints, incorporating a dual-purpose calibration tube with integrated pressure and temperature transducers, a sound source for dynamic calibration, and a gas source for static calibration, along with a controller to manage the calibration processes, allowing for both static and sinusoidal dynamic calibration modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate equipment is used for static and dynamic calibration, then calibration precision is improved, but device complexity increases
Solution Approach 1:
The patent combines static calibration and dynamic calibration functions into a single integrated calibration system. The calibration chamber serves both purposes by accepting different pressure delivery configurations: a static pressure source for static calibration and a dynamic pressure source connected via adapter for dynamic calibration. This merging eliminates the need for separate equipment while maintaining calibration precision through standardized measurement protocols.
Solution Approach 2:
The calibration chamber is designed as a universal platform that can perform multiple calibration functions. It includes a standardized pressure sensor mounting interface and flexible pressure delivery systems that accommodate both static and dynamic calibration modes. The system also incorporates temperature control and measurement capabilities that serve both calibration types, making the equipment multi-functional rather than dedicated to a single purpose.
2Measurement precision
If temperature control is added to calibration system, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
Temperature control and measurement functions are integrated into the existing calibration chamber structure rather than added as separate external systems. The chamber includes built-in heating elements and temperature sensors positioned to directly monitor the pressure sensor environment. This integration allows temperature compensation and control to be part of the core calibration process without requiring additional standalone equipment.
Solution Approach 2:
The calibration system incorporates self-regulating temperature control through feedback from integrated temperature sensors. The system automatically adjusts heating to maintain stable temperature conditions during calibration, reducing the need for external temperature control equipment and manual intervention. The temperature data is automatically used to compensate pressure measurements, making the system self-correcting for thermal effects.
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
Enables simultaneous static and dynamic calibration of optical pressure sensitive paints, incorporating temperature control, thus achieving accurate and precise measurement results without the need for multiple equipment setups.
Implementation Method 1
The principle of PSP pressure measurement is based on the principle of photoluminescence and oxygen quenching. That is, under ultraviolet illumination of a certain wavelength, photosensitive molecules in the paint obtain energy from a ground state and jump up to an excited state, and return to the ground state, in which process the molecules emit excited light.
Implementation Method 2
However, after colliding with oxygen molecules, the photosensitive molecules do not emit fluorescence when returning to the ground state. As the concentration of oxygen molecules is different at different pressures, the intensity of the excited light has a certain relationship with pressure.
Implementation Method 3
a sound source, configured to provide a dynamic pressure in the form of a sound wave during a dynamic calibration mode
Implementation Method 4
the bottom cap being sleeved with a heating device outside
Data Source
AI summary
A dual-purpose calibration system for an optical pressure sensitive paint considering static and sinusoidal pressure changes, and a calibration method, in which a dual-purpose calibration tube is used in common, are provided. In the dual-purpose calibration system, a dynamic adapter and a static adapter are replaced with each other to achieve switching between dynamic calibration and static calibration, so that two calibration methods, one static and the other dynamic, can be implemented by the dual-purpose calibration system. The switching between the dynamic calibration and the static calibration includes changing between the dynamic adapter and static adapter, and setting a sound source corresponding to the dynamic adapter or setting a gas source corresponding to the static adapter.