發(fā)布時(shí)間：2018-10-31 20:48

【摘要】：光干涉甲烷檢測(cè)器具有穩(wěn)定可靠性強(qiáng)、測(cè)量范圍寬等優(yōu)點(diǎn),但現(xiàn)有設(shè)備都采用人工讀數(shù)方式,自動(dòng)化程度低,不能連接到煤礦監(jiān)控系統(tǒng)。針對(duì)該問(wèn)題,提出了一種基于測(cè)量干涉條紋光強(qiáng)的改進(jìn)方法。通過(guò)改進(jìn)光路設(shè)計(jì),保證了甲烷體積分?jǐn)?shù)與光強(qiáng)變化之間對(duì)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(qiáng)變化得到甲烷體積分?jǐn)?shù)。針對(duì)光干涉甲烷檢測(cè)器的零點(diǎn)受外界環(huán)境因素影響而發(fā)生漂移的問(wèn)題,首先通過(guò)理論分析得到了外界氣壓與測(cè)量誤差之間的關(guān)系模型,并使用該模型對(duì)外界氣壓變化進(jìn)行補(bǔ)償;然后由實(shí)驗(yàn)得到溫度與測(cè)量誤差之間的關(guān)系,采用線性插值方法建立溫度補(bǔ)償模型。最后通過(guò)精度實(shí)驗(yàn)、壓強(qiáng)實(shí)驗(yàn)、溫度實(shí)驗(yàn)和長(zhǎng)期穩(wěn)定性實(shí)驗(yàn)驗(yàn)證了所設(shè)計(jì)的補(bǔ)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(guó)科學(xué)院自動(dòng)化研究所復(fù)雜系統(tǒng)管理與控制國(guó)家重點(diǎn)實(shí)驗(yàn)室;北京信息職業(yè)技術(shù)學(xué)院電子工程系;
【基金】：國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863)資助項(xiàng)目(2013AA041002-1) 國(guó)家“十二五”科技支撐計(jì)劃資助項(xiàng)目(2013BAF07B05-2)
【分類號(hào)】：TD712

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本文編號(hào)：2303501