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Near infrared spectrum quick test method of new oil quality of lubricating oil

A technology of near-infrared spectroscopy and rapid determination, which is used in the measurement of color/spectral properties, measuring devices, and material analysis by optical means, etc., to achieve the effects of cheap instruments, strong environmental adaptability, and easy operation.

Inactive Publication Date: 2010-11-24
PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology has not been used for the quality inspection of lubricating oil

Method used

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  • Near infrared spectrum quick test method of new oil quality of lubricating oil
  • Near infrared spectrum quick test method of new oil quality of lubricating oil
  • Near infrared spectrum quick test method of new oil quality of lubricating oil

Examples

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example 1

[0066] Example 1: Determination of lubricating oil quality indicators by FT-NIR method

[0067] 1) Collect training set samples

[0068] 125 lubricating oil samples were collected, including 86 internal combustion engine oils, 26 hydraulic oils, and 13 gear oils, whose manufacturers include Shell, ESSO, Mobil, MOBIL, Great Wall and Kunlun, etc. The training set is further divided into a correction set and a verification set. The ratio of the number of samples in the correction set to the verification set is 6 / 4. The distribution is shown in image 3 .

[0069] 2) Determination of the near-infrared spectrum of the training set samples

[0070] The transmission absorbance spectra of the samples in the training set were measured by FT-NIR spectrometer. The instrument is VECTOR 22 / N, produced by Bruker. The measurement conditions are: resolution 4cm -1 , scan 32 times, wavelength range: 4000~12000cm -1 (833nm-2500nm), quartz cuvette, the optical path is 0.5cm. The measured ...

example 2

[0087] Example 2: Determination of lubricating oil quality indicators by CCD-NIR method

[0088] 1) Collect new oil samples

[0089] The samples were the same as in Example 1.

[0090] 2) Determination of near-infrared spectrum of lubricating oil

[0091] The near-infrared absorption and transmission spectra of lubricating oil samples were measured by CCD-NIR spectrometer. The instrument is a portable mass analyzer produced by the Oil Plant Research Institute of the General Logistics Department. The detector is a CCD with 2048 pixels, a wavelength range of 700-1100nm, and a resolution of 0.2nm. Spectral measurement conditions: the instrument temperature is 37°C, and the sample temperature is 25°C. When the temperature reaches the set value, put the sample into a 5cm closed color dish, scan automatically, and record the last spectrum as the final spectrum. Determination spectrum see Figure 22 .

[0092] 3) The quality index of the lubricating oil sample was measured by t...

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Abstract

The invention discloses a near infrared spectrum quick test method of new oil quality of lubricating oil. The method comprises the following steps of: 1, collecting a representative sample of the lubricating oil as a training set; 2, measuring the near infrared spectrum of the lubricating oil sample of the training set, performing the corresponding pretreatment of the near infrared spectrum, and using the pretreated spectrum data as a variable; 3, selecting a proper multivariate calibration method to establish a model of the relationship between an new oil quality index of the lubricating oil and the spectrum; and 4, for the quality measurement of the unknown lubricating oil sample, measuring the near infrared spectrum of the lubricating oil sample, performing the same pretreatment, and measuring the quality index of the lubricating oil by the quality analysis model of the lubricating oil. The method can quickly measure 18 quality parameters such as chemical composition content, physical-chemical properties, main elements and additive elements by the near infrared spectrum and has the advantages of high analytic speed, easy operation and high quality monitoring capability of the lubricating oil.

Description

technical field [0001] The invention relates to a method for quickly measuring the quality of new lubricating oil by near-infrared spectroscopy. 18 methods of quality parameters. Background technique [0002] Lubricating oil is the blood of equipment, and its quality is closely related to the performance of the equipment. Users need to monitor its quality from time to time to detect problems early and avoid using unqualified lubricating oil, which will cause the equipment to malfunction. In the actual use process, the method specified by the lubricating oil product is often used to analyze the quality of the lubricating oil one by one. The analysis cycle is long, and it takes at least two weeks for an analyst to complete the chemical composition, physical and chemical quality indicators, and elemental analysis of lubricating oil; multiple analytical equipment are required, and the equipment is expensive, and millions of dollars are needed to complete the above analysis ; C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G06F19/00G01N21/3577G01N21/359
Inventor 田高友熊春华
Owner PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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