【摘要】：針對(duì)柴油機(jī)潤(rùn)滑油被燃油稀釋的狀態(tài)監(jiān)測(cè)的問(wèn)題,研究了基于紫外熒光技術(shù)的柴油機(jī)潤(rùn)滑油被燃油稀釋的檢測(cè)方法,設(shè)計(jì)搭建了檢測(cè)實(shí)驗(yàn)裝置。利用峰值發(fā)射波長(zhǎng)為365nm的紫外LED作為發(fā)射光源,發(fā)射的紫外光通過(guò)400nm低通濾光片過(guò)濾后進(jìn)入石英比色皿中的油樣,并激發(fā)油樣產(chǎn)生熒光,產(chǎn)生的熒光通過(guò)400nm高通濾光片過(guò)濾后,利用探測(cè)波長(zhǎng)范圍為400~800nm的光電傳感器采集油樣的熒光信號(hào),利用萬(wàn)用表讀取油樣的熒光強(qiáng)度。設(shè)計(jì)開(kāi)發(fā)了信號(hào)的放大和測(cè)量系統(tǒng)。高、低通濾光片的組合使用,減少了紫外光源所發(fā)射的紫外光對(duì)油樣的熒光強(qiáng)度測(cè)量的干擾。利用該實(shí)驗(yàn)裝置,測(cè)量了潤(rùn)滑油中柴油含量分別為20.3 Wt.%,10.0 Wt.%,5.0 Wt.%,2.5 Wt.%,1.5 Wt.%和0.7 Wt.%以及不含柴油的空白油樣的熒光強(qiáng)度,經(jīng)擬合得到柴油含量與熒光強(qiáng)度的方程。最后,為了檢驗(yàn)該方法測(cè)量潤(rùn)滑油中柴油含量的準(zhǔn)確性,采用柴油含量為7.5 Wt.%油樣進(jìn)行驗(yàn)證,利用該實(shí)驗(yàn)裝置,測(cè)量了驗(yàn)證油樣的熒光強(qiáng)度,代入擬合方程,計(jì)算得到油樣中的柴油含量,結(jié)果表明通過(guò)該方法測(cè)量的油樣中柴油含量與油樣的實(shí)際柴油含量的相對(duì)誤差為0.5%,實(shí)現(xiàn)了實(shí)驗(yàn)室條件下潤(rùn)滑油被燃油稀釋的精確測(cè)量。
[Abstract]:Aiming at the condition monitoring of diesel oil diluted by fuel, the detection method of diesel oil diluted by fuel oil based on ultraviolet fluorescence technology is studied, and the testing experimental device is designed and built. Ultraviolet LED with a peak emission wavelength of 365nm is used as the emitting light source. The ultraviolet light emitted by the ultraviolet light is filtered through the 400nm low-pass filter and then filtered into the quartz colorimetric dish. The oil sample is stimulated to produce fluorescence, and the generated fluorescence is filtered by the 400nm high-pass filter. The fluorescence signal of oil sample is collected by photoelectric sensor with 400~800nm wavelength range, and the fluorescence intensity of oil sample is read by multimeter. A signal amplification and measurement system is designed and developed. The combination of high and low pass filters reduces the interference of ultraviolet light emitted by ultraviolet light on the fluorescence intensity measurement of oil samples. The fluorescence intensity of diesel oil in lubricating oil was measured with 20.3 Wt.10. 0 Wt.Ki 5.0 Wt. and 2.5 Wt.% and 0.7 Wt.%, as well as blank oil samples without diesel oil, respectively. The equation of diesel oil content and fluorescence intensity was obtained by fitting. Finally, in order to test the accuracy of the method for measuring diesel oil content in lubricating oil, a 7.5 Wt.% diesel oil sample was used to verify the accuracy of the method. The fluorescence intensity of the oil sample was measured and the fitting equation was used to test the fluorescence intensity of the oil sample. The results show that the relative error between the diesel content measured by this method and the actual diesel content of the oil sample is 0.5, which realizes the accurate measurement of the oil diluted by fuel under the laboratory conditions.
【作者單位】： 海軍工程大學(xué)動(dòng)力工程學(xué)院;武漢理工大學(xué)能源與動(dòng)力工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51309185)資助
【分類號(hào)】：O657.3;TE626.3

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