کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7147710 | 1462100 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance improvement of a near-infrared CH4 detection device using wavelet-denoising-assisted wavelength modulation technique
ترجمه فارسی عنوان
بهبود عملکرد یک دستگاه تشخیص چهره نزدیک به مادون قرمز با استفاده از تکنیک مدولاسیون طول موج موجک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
By introducing wavelet-denoising (WD) in the traditional tunable diode laser absorption spectroscopy (TDLAS), a novel CH4 detection device based on WD-assisted wavelength modulation technique was experimentally demonstrated. Formulation and detection procedure were presented, and experiments were carried out to prove the normal function on the extraction of 2f signal from severely polluted differential signal with WD algorithm. With the fabricated device, sensing characteristics were measured on CH4 concentration. The response time is less than 8Â s within the whole detection range of 0-50Â kppm. By virtue of the suppression on noises with WD, the minimum detection limit (MDL) is dropped from 4 to 1Â ppm, the maximum detection error is minimized from 6.2% to 3.8% over the concentration range of 4-50Â kppm, and the decreased Allan deviation (per an average observing time of 9Â min for 24Â h) from 0.13 to 0.08Â ppm suggests enhanced stability. The proposed device also exhibits improved performances compared with our previously reported sensors based on simple direct spectroscopy absorption (DSA) technique and wide-band incandescence wire-source.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 190, January 2014, Pages 249-258
Journal: Sensors and Actuators B: Chemical - Volume 190, January 2014, Pages 249-258
نویسندگان
Chuan-Tao Zheng, Wei-Lin Ye, Jian-Qiang Huang, Tian-Shu Cao, Mo Lv, Jing-Min Dang, Yi-Ding Wang,