Temperature measurement system based on yag:dy fluorescence lifetime measurement and its test method and application
A technology of temperature measurement and fluorescence lifetime, which is applied in heat measurement, engine testing, machine/structural component testing, etc. It can solve the problem of low temperature measurement, achieve high temperature accuracy, facilitate industrial production, and have a wide range of applications.
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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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