When measuring the oil concentration lower than 10 mg/L in reinjection water based on ultraviolet fluorescence method, high thermal power of the light source will reduce the accuracy of measurement results. To reduce the thermal power of light source, pulse modulation dimming method (duty ratio less than 50%) was proposed to replace square-wave modulation dimming method (duty ratio equal to 50%). Two noise analysis models for pulse modulation and square-wave modulation dimming method were built. Signal-to-noise ratio (SNR) of measurement results for two methods were compared. The relationship between SNR and light source power was derived. The optimum choices of current amplitude and duty ratio for pulse modulation dimming method were proposed under the condition of the same signal-to-noise ratio. Results show that the light source power for pulse modulation dimming method is less than 21% of that for square-wave modulation dimming method under the condition of the same signal-to-noise ratio. Finally, signal demodulation models of two dimming methods were simulated by MATLAB software. The simulated relationship of SNR for two methods is consistent with the theoretical analysis results.
Home > Journal Home > Opto-Electronic Engineering
Opto-Electronic Engineering
ISSN: 1003-501X
CN: 51-1346/O4
Monthly, included in CA, Scopus, CSCD
CN: 51-1346/O4
Monthly, included in CA, Scopus, CSCD
The establishment and analysis of noise model for pulse modulation dimming method and square-wave modulation dimming method
Author Affiliations
Correspondence: fjduan@tju.edu.cn
First published at:Feb 18, 2019
Abstract
Overview
References
2 Zhao Y Q, Yu H B, He F. Research on the online detection of oil concentration in water[J]. Spectroscopy and Spectral Analysis, 2013, 33(11): 2949-2952. DOI:10.3964/j.issn.1000-0593(2013)11-2949-04
赵友全, 于海波, 何峰.水中油浓度在线检测方法的研究[J].光谱学与光谱分析, 2013, 33(11): 2949-2952. DOI:10.3964/j.issn.1000-0593(2013)11-2949-04
3 Wang L R, Yang J H. Measurement of micro oil in water by using ultraviolet fluorescence spectrum technology[C]//Proceedings of the 8th International Conference on Electronic Measurement and Instruments, 2007: 3-556-3-559.
4 Cai X H, Cai S W, Cheng Q, et al. Determination of petroleum substance in groundwater by infrared spectrophotometry[J]. Chemical Analysis and Meterage, 2014, 23(4): 14-16. DOI:10.3969/j.issn.1008-6145.2014.04.004
蔡小虎, 蔡述伟, 程青, 等.红外分光光度法测定地下水中的石油类物质[J].化学分析计量, 2014, 23(4): 14-16. DOI:10.3969/j.issn.1008-6145.2014.04.004
7 Sharikova A V, Killinger D K. LIF detection of trace species in water using different UV laser wavelengths[J]. International Journal of High Speed Electronics and Systems, 2007, 17(4): 689-695. DOI:10.1142/S0129156407004898
9 Sharikova A V, Killinger D K. Laser- and UV-LED-Induced fluorescence detection of drinking water and water-dissolved organics[C]//Digital Holography and Three-Dimensional Imaging, 2008.
12 Si R, Lu Y L, Deng X F, et al. Content indicators and control technology of suspended solid and oil of reinjection water in Weibei oilfield[J]. Reservoir Evaluation and Development, 2016, 6(2): 51-53, 59. DOI:10.3969/j.issn.2095-1426.2016.02.012
斯容, 卢瑜林, 邓学峰, 等.渭北油田回注水中悬浮物和油含量指标及控制技术[J].油气藏评价与开发, 2016, 6(2): 51-53, 59. DOI:10.3969/j.issn.2095-1426.2016.02.012
14 Mei Y, Chen Y Y, Yuan C, et al. Measurement of LEDs' temperature characteristics[J]. China Illuminating Engineering Journal, 2007, 18(1): 17-20. DOI:10.3969/j.issn.1004-440X.2007.01.005
梅毅, 陈郁阳, 袁川, 等. LED温度特性的测试[J].照明工程学报, 2007, 18(1): 17-20. DOI:10.3969/j.issn.1004-440X.2007.01.005
Keywords:
Funds:
Supported by the National Key Research and Development Program (2017YFF0204800), National High-tech R & D Program of China (863 Program) (2013AA102402), National Natural Science Foundation of China (61501319), Tianjin Natural Science Foundation (17JCQNJC01100), Photoelectric Information and Instruments Beijing Engineering Research Center Open Project (GD2015007), Regional Demonstration Project for Innovative Development of Marine economy(cxsf2014-2), the Doctoral Program Fund of the Ministry of Education (20130032110054), and Microlight Electromechanical System Technology Ministry of Education Key Laboratory Open Fund (MOMST2015-7)
Export Citations as:
For
Get Citation:
Chen Jingtao, Duan Fajie, Jiang Jiajia, et al. The establishment and analysis of noise model for pulse modulation dimming method and square-wave modulation dimming method[J]. Opto-Electronic Engineering, 2019, 46(2): 180338.
