Method for identifying engine lubricating oil infrared fingerprint spectrogram
A technology of infrared spectrum and fingerprint spectrum, which is applied in the field of infrared fingerprint spectrum identification of engine lubricating oil, can solve the problems of restricting the quality supervision and management of engine lubricating oil, difficult identification of engine lubricating oil, anti-counterfeiting and anti-counterfeiting, etc.
Inactive Publication Date: 2013-09-25
REAR SERVICE TECH EQUIP INST NAVY PLA
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However, these methods are difficult to realize the identification of engine lubricating oil in a short period of time, which seriously restricts the quality supervision and management of engine lubricating oil, such as quality spot checks and anti-counterfeiting crackdowns, etc.
[0008] Guan Liang et al. published the article "Rapid identification of internal combustion engine lubricating oils with different formulation systems by dielectric spectrum technology" in "Acta Petroleum Sinica (Petroleum Processing)" (June 2008, Volume 24, No. 3, P350-355). Rapid identification of formulation systems, but the ability of dielectric spectrum technology to obtain engine lubricating oil fingerprint feature information is limited, and more complex chemometric methods must be used for feature extraction
[0009] Using the infrared fingerprint of engine lubricating oil to realize the similarity analysis between the engine lubricating oil sample to be analyzed and the standard engine lubricating oil sample, and to identify the unknown engine lubricating oil sample has not been reported yet
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[0025] a. Collect standard samples, collect infrared spectra under specified test conditions, and establish a standard sample library. The infrared spectrum test conditions are as follows: the wavelength range covers the mid-infrared spectrum range, and the wavelength resolution is not greater than 4cm -1 , using a transmission liquid cell for testing, the thickness of the liquid layer, that is, the optical path is about 0.2mm, to ensure that the infrared fingerprint area of the sample, that is, 1330 ~ 660cm -1 , the absorption peak is sufficiently strong.
[0026] The collected standard samples are shown in Table 1 below.
[0027] Table 1: List of Standard Samples of Engine Lubricating Oil
[0028] serial number
sample code
Viscosity grade
1
FDJ-01
SD / CC
10W-30
2
FDJ-02
cd
40
3
FDJ-03
SF / CD
0W-30
4
FDJ-04
SD / CC
15W-40
5
FDJ-05
SF / CC
15W-40
...
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The invention discloses a method for identifying an engine lubricating oil infrared fingerprint spectrogram. The method comprises the following steps of: a, collecting standard samples, acquiring infrared spectrograms and establishing a standard sample bank; b, acquiring infrared spectrograms of samples to be analyzed under the test condition as same as that of the standard samples; c, preprocessing the infrared spectrograms of the samples to be analyzed and the standard samples; d, performing similarity calculation on the infrared spectrograms of the samples to be analyzed and the infrared spectrograms of the samples in the standard sample bank; e, obtaining a conclusion according to the similarity. By adoption of the method, the constitution and structure consistency among the samples to be analyzed and the standard samples can be determined through the similarity of the infrared fingerprint spectrograms of the samples to be analyzed and the standard samples, so that the effective quality supervision and management are performed on engine lubricating oil.
Description
technical field [0001] The invention relates to a method for identifying engine lubricating oil infrared fingerprints, in particular to a method for rapidly identifying unknown engine lubricating oil as having similar composition and structural features to samples in a standard library. Background technique [0002] There are many kinds of engine lubricating oil, which can be divided into three categories: gasoline engine oil, diesel engine oil and general internal combustion engine oil. In each type of engine oil, it contains a variety of viscosity grades and quality grades. Moreover, for the same type of engine lubricating oil with the same viscosity grade and quality grade, the composition, structure, and formula system of engine lubricating oil products from different manufacturers are quite different, resulting in obvious differences in their performance. [0003] Due to the complexity of lubricating oil varieties, specifications and grades, different application field...
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Inventor 马兰芝管亮王建华冯新泸胡泽祥
Owner REAR SERVICE TECH EQUIP INST NAVY PLA