Study on three dimensional laser-induced fluorescence (3DLIF) techniques and its instrument
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摘要: 本文介绍了激光诱导荧光（LIF）技术测量水体浓度场、温度场和速度场的基本原理，总结了从一维到三维LIF技术的发展历程，综述了激光诱导荧光（LIF）技术测量水体标量场的关键问题，包括激光器和片光源、荧光物质选择和校正方法，从工程化和产业化的需求出发，提出了基于3DLIF技术的水体三维标量场测量仪器的总体技术方案、技术路线和总体技术指标，并给出了3DLIF的关键技术及其解决方案。
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关键词:
- 三维激光诱导荧光技术(3DLIF) /
- 水体 /
- 标量场测量
Abstract: This paper introduces the principle of the LIF technique to measure the water concentration, temperature and velocity fields, summarizes the LIF technology development from 1D to 3D, reviews the key issues of LIF to measure the scalar field in water, including laser and light-sheet sources, fluorescence material selections and calibration methods, and finally reviews various correction methods of PLIF and 3DLIF. Based on the 3DLIF techniques, this paper proposes an overall technical scheme, technical route and overall technical indicators of 3DLIF instrument, and then provides solutions of 3DLIF key techniques to meet the demand of engineering and industrialization. -
图 3 液体中荧光素钠的荧光强度随浓度变化[1]
Figure 3. The variance of the fluorescence intensity with fluorescent sodium concentration in the liquid
图 4 不同温度条件下罗丹明B的激发-发射光谱[3]
Figure 4. The excitation-emission spectrums of rhodamine B under different temperature conditions
图 5 罗丹明B的荧光强度随温度线性变化[3]
Figure 5. Linear change of rhodamine B fluorescence intensity with temperature
图 9 双振镜3DLIF测量示意[10]
Figure 9. Schematic of 3DLIF measurement with double vibrating mirrors
图 12 扇形高斯分布片光源
Figure 12. The fan-type light-sheet with Gaussian intensity distribution
图 13 3DLIF技术测量三维浓度(温度)场技术路线图
Figure 13. Roadmap of three dimensional scalar fields measurement by 3DLIF
表 1 3种常见荧光物质的适宜激发波长
Table 1. Matched excitation wavelengths of three common fluorescent materials
荧光物质 激发谱波长/nm[21] 适宜激光波长/nm 测量参量 最小 最大 峰值 荧光素钠 430 520 490 460~500 浓度 罗丹明6G 460 560 530 500~550 浓度 罗丹明B 460 590 550 525~575 温度 
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表 2 新型荧光物质
Table 2. New fluorescent materials
序号 荧光物质名称 文献 1 Carboxy-seminapthorhodafluoror SNARF [22] 2 Seminaphthofluoresceinor SNAFL 3 1，4-Dihydroxyphthalonitrile(DHPN) 4 Hydroxypyrene-1，3，6 trisulfonic acid (HPTS) 5 Lucifer yellow 6 Phloxine B 7 Kiton red 8 LDS 698(or pyridine 1) 9 Rhodamine系列：Rhodamine B，Rhodamine 6G，Rhodamine WT，Rhodamine 610，Rhodamine110，Sulforhodamine 640 10 5(6)-Carboxy-2′, 7′-dichlorofluorescein [1] 11 Pyrromethene 556 [23] 12 Alexa dyes(Alexa 350，Alexa 430，Alexa 488，Alexa 532，Alexa 546，Alexa 568，and Alexa 594 dyes) [24]
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表 3 仪器总体技术指标
Table 3. Overall technical indicators of 3DLIF equipment
技术指标 精度或范围 三维测量范围 (0.3~0.5) m×1m×1m 测量精度 < 10-2ppm(浓度场)； < 0.2℃(温度场) 最大扫描速度 1m/s 图像分辨率 1280pixel×1024pixel 满分辨率帧速 500帧/s
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