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Sine type optical pressure dynamic calibration cabin considering temperature control and optical path layout

A temperature-controlled, dynamic calibration technique

Active Publication Date: 2019-08-20
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although these patents or articles can dynamically calibrate the PSP, they have the disadvantages of low calibration frequency and great influence of clutter, and they have not solved the problem of optimizing the optical path layout of optical instruments, nor have they studied the temperature's effect on the dynamic response of the PSP. influences

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  • Sine type optical pressure dynamic calibration cabin considering temperature control and optical path layout
  • Sine type optical pressure dynamic calibration cabin considering temperature control and optical path layout
  • Sine type optical pressure dynamic calibration cabin considering temperature control and optical path layout

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Embodiment Construction

[0036] The present invention will now be further described in conjunction with the embodiments and drawings:

[0037] 1. Selection and connection method of connecting components with standing wave tube

[0038] Such as figure 1 Said standing wave tube 6 is a standing wave tube designed in the first edition of the dynamic pressure calibration chamber for sinusoidal optical pressure sensitive paint. The dynamic pressure sensor 1 and the PT100 pressure nose temperature sensor 2 are connected to the standing wave tube 6 through a sensor protective sleeve. The PT100 pressure-nose temperature sensor can be attached to the surface of the optical pressure-sensitive coating for temperature measurement with high temperature measurement accuracy. The sensor selection accuracy is 1 / 3B accuracy, the measurable temperature accuracy is 0.1℃, and the measurable temperature range is -50℃ to 250℃, which meets the experimental requirements. The upper part 4 of the standing wave tube main section su...

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Abstract

The invention relates to a sine type optical pressure-sensitive coating dynamic pressure calibration cabin, which is used for dynamic pressure calibration of a pressure-sensitive coating. By configuring a special optical precision platform, related components are self-designed and manufactured, and the optimization of an optical instrument alignment process of the dynamic calibration cabin is realized; and the optimization can greatly shorten the experiment time, optimize an experiment process and improve a dynamic response frequency. By selecting a PT100 temperature sensor, a heating ring anda matched temperature controller, accurate control on the temperature of the optical pressure-sensitive coating in the dynamic calibration process is realized, so that the influence of the temperature on dynamic response of the optical pressure-sensitive coating can be studied. Through the improvement of the dynamic calibration cabin, dynamic calibration of optical pressure sensitivity of all wave bands below 80kHz can be realized, the world advanced level is achieved, and the frequency is close to the practical frequency range of a turbomachinery. The calibration cabin is simple in structure, convenient to process, high in anti-interference capability and capable of effectively reducing the experiment cost.

Description

Technical field [0001] The invention relates to a dynamic pressure calibration device, in particular to an optical dynamic pressure calibration device, which belongs to the technical field of instrumentation. The invention can complete the sinusoidal periodic dynamic calibration more simply, and is mainly used for the high frequency dynamic pressure calibration of pressure sensitive paint. Background technique [0002] As one of the three thermal parameters (pressure, temperature, flow) of automatic control, pressure occupies a very important position in measurement and control. There are many ways to measure pressure, but each of them requires calibration of the measuring equipment in order to obtain measurement data, such as the functional relationship between electrical and optical signals and pressure, and the characteristics of the measurement system such as sensitivity. Calibration is divided into static calibration and dynamic calibration. The purpose of static calibratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L25/00G01L27/00
CPCG01L25/00G01L27/005
Inventor 高丽敏姜衡葛宁郑天龙杨冠华
Owner NORTHWESTERN POLYTECHNICAL UNIV
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