【摘要】：光干涉甲烷檢測器具有穩(wěn)定可靠性強、測量范圍寬等優(yōu)點,但現(xiàn)有設(shè)備都采用人工讀數(shù)方式,自動化程度低,不能連接到煤礦監(jiān)控系統(tǒng)。針對該問題,提出了一種基于測量干涉條紋光強的改進方法。通過改進光路設(shè)計,保證了甲烷體積分?jǐn)?shù)與光強變化之間對應(yīng)關(guān)系的惟一性。使用光電元件采集干涉條紋,根據(jù)干涉條紋的光強變化得到甲烷體積分?jǐn)?shù)。針對光干涉甲烷檢測器的零點受外界環(huán)境因素影響而發(fā)生漂移的問題,首先通過理論分析得到了外界氣壓與測量誤差之間的關(guān)系模型,并使用該模型對外界氣壓變化進行補償;然后由實驗得到溫度與測量誤差之間的關(guān)系,采用線性插值方法建立溫度補償模型。最后通過精度實驗、壓強實驗、溫度實驗和長期穩(wěn)定性實驗驗證了所設(shè)計的補償模型的有效性和系統(tǒng)的穩(wěn)定性。
[Abstract]:The light interference methane detector has the advantages of strong stability and reliability and wide measuring range. However, the existing equipments are manual reading, and the degree of automation is low, which can not be connected to the coal mine monitoring system. To solve this problem, an improved method based on measuring the intensity of interference fringes is proposed. By improving the optical path design, the uniqueness of the corresponding relation between the volume fraction of methane and the variation of light intensity is ensured. The interference fringes are collected by photoelectric elements and the methane volume fraction is obtained according to the light intensity variation of the interference fringes. Aiming at the problem that the zero point of light interference methane detector is drifted by external environmental factors, the model of relationship between external pressure and measurement error is obtained by theoretical analysis, and the model is used to compensate for the change of external pressure. Then the relationship between temperature and measurement error is obtained by experiments, and the temperature compensation model is established by linear interpolation method. Finally, the validity of the compensation model and the stability of the system are verified by precision experiment, pressure experiment, temperature experiment and long-term stability experiment.
【作者單位】： 中國科學(xué)院自動化研究所復(fù)雜系統(tǒng)管理與控制國家重點實驗室;北京信息職業(yè)技術(shù)學(xué)院電子工程系;
【基金】：國家高技術(shù)研究發(fā)展計劃(863)資助項目(2013AA041002-1) 國家“十二五”科技支撐計劃資助項目(2013BAF07B05-2)
【分類號】：TD712

【參考文獻】

相關(guān)期刊論文 前4條

1 ;The performance of nano multicomponent cocatalyst in the improvement of catalytic sensor of methane[J];Journal of Coal Science & Engineering(China);2010年03期

2 于洋;李鑫;崔宏明;左巖;李鑫寶;冉凡立;;智能光干涉甲烷傳感器的設(shè)計[J];煤礦安全;2011年01期

3 李安安;王德亮;喬熙;張鵬;韓旭;;光纖Bragg光柵傳感器在鉆井井壁監(jiān)測中的應(yīng)用[J];煤炭科學(xué)技術(shù);2011年01期

4 付華;楊┛，

本文編號：2303501