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Temperature measurement system based on YAG: Dy fluorescence lifetime measurement as well as test method and application thereof

A technology for temperature measurement and fluorescence lifetime, which is used in heat measurement, engine testing, and machine/structural component testing. Effect

Active Publication Date: 2017-02-22
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is exactly to provide a kind of test accuracy height in order to overcome the defective that above-mentioned prior art exists, and economical practicality is good, and service life is long, the temperature measurement system based on YAG:Dy fluorescence lifetime measurement of stable performance and its testing method and Application to solve the defects of low measurement temperature in the temperature measurement of aero-engine and other high-temperature applications in the prior art

Method used

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  • Temperature measurement system based on YAG: Dy fluorescence lifetime measurement as well as test method and application thereof
  • Temperature measurement system based on YAG: Dy fluorescence lifetime measurement as well as test method and application thereof
  • Temperature measurement system based on YAG: Dy fluorescence lifetime measurement as well as test method and application thereof

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Embodiment 1

[0042] Such as Figure 1-2 Shown, based on the temperature measurement system of YAG:Dy fluorescence lifetime measurement, this temperature measurement system comprises signal transmitter 1, the UV-LED ultraviolet light source 2 that is electrically connected with signal transmitter 1, temperature measurement probe 3 and temperature measurement probe The temperature signal processing unit used in conjunction with the needle 3, the temperature signal processing unit includes a filter 4, a photomultiplier tube detector 5, a resistance box 6 and an oscilloscope 7 electrically connected to the photomultiplier tube detector 5 in sequence, and a temperature measurement probe The surface of 3 is sprayed with YAG:Dy fluorescent layer 8, and is connected with UV-LED ultraviolet light source 2, optical filter 4 respectively through optical fiber 9;

[0043] Wherein, the temperature measuring probe 3 is a single crystal aluminum oxide temperature measuring probe whose surface is plasma s...

Embodiment 2

[0060]First, YAG was prepared by solid-state reaction method: 1mol% Dy 2 o 3 powder, and then the single crystal alumina is cleaned and sandblasted. A 10 μm YAG:Dy phosphor layer 8 was prepared by plasma spraying technology. Spraying parameters: spraying current is 400A, voltage is 150V, Ar flow rate is 45L / min, H 2 The flow rate is 45L / min, the distance between the spray gun and the substrate is 150mm, and the powder feeding rate is 5g / min. The single crystal alumina sprayed with YAG:Dy fluorescent layer 8 is connected to the optical fiber 9 and divided into two outputs. One is connected to a UV-LED ultraviolet light source 2 with a wavelength of 355nm and a signal transmitter 1. The signal transmitter 1 changes the continuous light source into a pulsed light source with a pulse width of 1ms and a pulse period of 100ms. One connects the 550nm high-pass filter, the 600nm low-pass filter, the resistance box 6, the oscilloscope 7, and connects the signal transmitter 1 to the...

Embodiment 3

[0063] First, YAG was prepared by solid-state reaction method: 1mol% Dy 2 o 3 powder, and then the single crystal alumina is cleaned and sandblasted. A 10 μm YAG:Dy phosphor layer 8 was prepared by plasma spraying technology. Spraying parameters: spraying current is 400A, voltage is 150V, Ar flow rate is 60L / min, H 2 The flow rate is 20L / min, the distance between the spray gun and the substrate is 150mm, and the powder feeding rate is 5g / min. The single crystal alumina sprayed with YAG:Dy fluorescent layer 8 is connected to the optical fiber 9 and divided into two outputs. One is connected to a UV-LED ultraviolet light source 2 with a wavelength of 385nm and a signal transmitter 1. The signal transmitter 1 changes the continuous light source into a pulsed light source with a pulse width of 1ms and a pulse period of 100ms. One connects the 550nm high-pass filter, the 600nm low-pass filter, the resistance box 6, the oscilloscope 7, and connects the signal transmitter 1 to th...

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Abstract

The invention relates to a temperature measurement system based on YAG: Dy fluorescence lifetime measurement as well as a test method and application thereof. The temperature measurement system comprises a signal transmitter, a UV-LED (Ultraviolet-Light Emitting Diode) ultraviolet light source electrically connected with the signal transmitter, a temperature measurement probe and a temperature signal processing unit used with the temperature measurement probe, wherein the temperature signal processing unit comprises a filter, a photomultiplier detector, as well as a resistor box and an oscilloscope electrically connected with the photomultiplier detector in sequence; the surface of the temperature measurement probe is coated with a YAG: Dy fluorescence layer, and the temperature measurement probe is connected with the UV-LED ultraviolet light source and the filter by optical fibers respectively; and the temperature measurement system is used for measuring the temperature of an aero-engine or a ground gas turbine in a working state. Compared with the prior art, the temperature measurement system has the characteristics of high measurement temperature (1080-1700 DEG C) and high temperature accuracy, adapts to the temperature measurement under different environments by changing the shape of the temperature measurement probe, does not influence the temperature field, and is high in temperature precision and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of inorganic optical materials, and relates to a temperature measurement system based on YAG:Dy fluorescence lifetime measurement, a testing method and an application thereof. Background technique [0002] With the development of advanced aero-engine technology, under the premise of pursuing high efficiency and long life of the turbine, the temperature in front of the turbine continues to increase. It is an important parameter that maintenance personnel must master, so it is of great significance to accurately and effectively detect the temperature. At present, the research and development of high-temperature test technology plays a very important role in the process of aero-engine replacement. [0003] In order to obtain the engine temperature, many methods can be used, for example, using measurement techniques such as infrared thermal imaging cameras, photoelectric pyrometers, temperature-indicating paint...

Claims

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Application Information

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IPC IPC(8): G01K11/32G01M15/02
CPCG01K11/3213G01M15/02
Inventor 杨丽霞赵晓峰郭芳威彭迪刘应征周新义肖平
Owner SHANGHAI JIAO TONG UNIV
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