基于蓝色二极管激光的no2(二氧化氮)气体检测外腔光声光谱仪设计

IF 0.2 Q4 CHEMISTRY, MULTIDISCIPLINARY
Harjum, A. Utomo, Mitrayana
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引用次数: 0

摘要

背景:NO2检测是必要的,因为NO2是一种导致光化学烟雾和酸雨的空气污染物。此外,呼吸系统疾病是由吸入空气中NO2含量高引起的。目的:本研究的目的是利用Arduino Uno使用PAS检测NO2,这是一项简单、简单、低成本的研究。方法:采用Arduino Uno微控制器,用光声光谱仪(PAS)对二氧化氮(NO2)气体进行检测。PAS系统使用波长为450 nm的蓝色二极管激光器作为辐射源,因为该波长适用于NO2气体。使用Arduino Uno的开关方案的调制系统来调制激光束的强度。调制频率已经改变以获得最大检测频率。所使用的光声电池是具有H型的单谐振器光声电池。在该测量中使用了声音传感器和光电二极管。利用锁定放大器对信号进行放大,并确定锁定放大器的恒定时间以优化PAS。氮气用于检测背景信号。结果和讨论:从光声光谱仪的优化中,获得的结果是激光二极管频率为1000Hz,占空比为50%,锁定放大器放大率为10000倍,恒定时间为3.3ms。在该测量中达到的最大浓度为6ppm。在该测量中获得的背景信号为0.00002V/W。在该测量中获得的最低检测限为0.0064ppm。结论:含有NO2的气体样品容器尺寸越大,其浓度越高。有时,大样本气体容器的NO2浓度被小样本容器超过。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
DESIGN OF EXTRA CAVITY PHOTOACOUSTIC SPECTROMETER BASED ON BLUE DIODE LASER IN NO2 (NITROGEN DIOXIDE) GAS DETECTION
Background: NO2 detection is necessary because NO2 is an air pollutant causing photochemical smog and acid rain. In addition, respiratory diseases are caused by high levels of NO2 in the inhaled air. Aim: The purpose of this study was to detect NO2 using PAS utilizing Arduino Uno, an easy, simple, and low-cost research. Methods: The detection of Nitrogen Dioxide (NO2) gas with a Photoacoustic Spectrometer (PAS) using an Arduino Uno microcontroller has been carried out. The PAS system uses a blue diode laser with a wavelength of 450 nm as the radiation source because this wavelength is suitable for NO2 gas. The intensity of the laser beam is modulated using a modulation system with an on-off scheme using the Arduino Uno. The modulation frequency has been varied to get the maximum detection frequency. The photoacoustic cell used was a single resonator photoacoustic cell with type H. Sound sensor and photodiode were used in this measurement. The amplification of the signal was done by utilizing the Lock-in amplifier, and the constant time of Lock-in amplifier was also determined to optimize the PAS. Nitrogen gas was used to detect background signal. Results and Discussion: From the photoacoustic spectrometer optimization, the results obtained were a laser diode frequency of 1,000 Hz with a duty cycle of 50% and a Lock-in amplifier amplification of 10,000 times with a constant time of 3.3 ms. The maximum concentration reached in this measurement was 6 ppm. The background signal achieved in this measurement was 0.00002 V/W. The lowest detection limit achieved in this measurement was 0.0064 ppm.Conclusion: The gas sample containers containing NO2 with larger sizes tend to have a greater concentration. Sometimes, the NO2 concentration of the large sample gas container was overtaken by the small sample container.
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来源期刊
Periodico Tche Quimica
Periodico Tche Quimica CHEMISTRY, MULTIDISCIPLINARY-
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发文量
17
期刊介绍: The Journal publishes original research papers, review articles, short communications (scientific publications), book reviews, forum articles, announcements or letters as well as interviews. Researchers from all countries are invited to publish on its pages.
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