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White light LED light source interference-resistant temperature measurement method by using thulium ion up-conversion violet light

A technology of LED light source and ions, which is applied in the direction of physical/chemical change thermometers, thermometers, measuring devices, etc., and can solve the problems of interference and interference of white light LED light sources

Active Publication Date: 2018-08-21
黑龙江省工研院资产经营管理有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing rare earth ion fluorescence intensity ratio temperature measurement technology will be interfered by the commonly used and common white LED light source in daily life and industrial production, and provide an anti-white LED light source using thulium ion up-conversion purple light Interfering temperature measurement method

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  • White light LED light source interference-resistant temperature measurement method by using thulium ion up-conversion violet light
  • White light LED light source interference-resistant temperature measurement method by using thulium ion up-conversion violet light
  • White light LED light source interference-resistant temperature measurement method by using thulium ion up-conversion violet light

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specific Embodiment approach 1

[0015] Specific embodiment one: In this embodiment, the method of temperature measurement using thulium ions to up-convert purple light to resist the interference of white light LED light source is carried out according to the following steps: 1. Preparation of Yb 3+ and Tm 3+ Ion-doped nanocrystalline NaYF 4 , to obtain the sample; 2. Using a 980nm laser diode as a pump light source to excite the sample, changing the temperature of the sample to obtain Tm at different temperatures 3+ Up-conversion fluorescence in the ultraviolet band of ions, monitoring two fluorescence bands with center wavelengths at 290nm and 345nm, integrating the intensity of the two fluorescence bands, and making a functional relationship between the intensity ratio of the two fluorescence bands and temperature FIR=3.6 *10 -4 *exp(T / 92.9)+1.55*10 -2 , T is the absolute temperature value; 3. Place the sample in the environment to be tested, obtain the intensity ratio of the above two corresponding flu...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Yb in step one 3+ and Tm 3+ Ion-doped nanocrystalline NaYF 4 The preparation method is solvothermal method. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific implementation mode three: the difference between this implementation mode and specific implementation mode one or two is: Yb in step one 3+ and Tm 3+ Ion-doped nanocrystalline NaYF 4 The preparation method specifically comprises the following steps:

[0023] (1) Under the condition of continuous magnetic stirring and full nitrogen protection gas, 0.75mmol YbCl 3 ·6H 2 O, 0.25mmol YbCl 3 ·6H 2 O and 0.003 mmol TmCl 3 ·6H 2 O was added to a 50mL round-bottom three-necked flask, and 6mL of oleic acid and 10mL of octadecene solvent were added, then the three-necked flask was sealed and heated to 160°C for 1h;

[0024] (2) Mix 6mmol NaOH and 4mmol NH 4 Add F into a glass sample bottle containing 20mL of methanol solution, and continue magnetic stirring at a temperature of 50°C for 0.5h to obtain a mixed solution A;

[0025] (3) Cool the three-neck flask in step (1) to 50°C, and add the mixed solution A into the three-necked flask, and keep warm at this tem...

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Abstract

The invention relates to a white light LED light source interference-resistant temperature measurement method by using thulium ion up-conversion violet light. The invention aims to solve a problem that an existing temperature measurement technology is usually interfered by common white-light LED light sources. According to the method of the invention, excitation light emitted by an excitation source excites a Yb3+ and Tm3+ ion doped nanocrystal NaYF4; two fluorescent bands of which the center wavelengths are 290 nm and 345 nm under different temperatures are monitored; integration is carried out; a functional relationship is obtained; the sample is arranged in an environment to be tested, so that the intensity ratio of the two fluorescent bands is obtained; and the intensity ratio is substituted into the function, so that a temperature value is obtained. With the method of the invention adopted, white light LED light source interference-resistant temperature measurement can be carriedout, so that more accurate results can be obtained. The method of the invention is applied to the rare earth fluorescence temperature measurement field.

Description

technical field [0001] The invention relates to a temperature measurement method for resisting the interference of a white light LED light source by using thulium ions to up-convert purple light. Background technique [0002] Temperature is a basic physical parameter that we are familiar with, and its unit Kelvin (K) is one of the seven international basic units, which shows its importance. Whether in our daily life or in many important industrial production scenarios, temperature is a very critical parameter, because temperature is always inextricably linked with other states and results. For example, the temperature of a bearing can often reflect the operating status of the component or the entire machine or system, so it can be judged whether it is running normally by monitoring the temperature of the bearing. In more and more occasions, traditional temperature sensing devices can no longer meet the requirements, especially temperature sensing devices represented by ther...

Claims

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Application Information

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IPC IPC(8): G01K11/00
CPCG01K11/006
Inventor 张治国李磊朋秦峰赵华郑仰东
Owner 黑龙江省工研院资产经营管理有限公司
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