Engine lubricating oil recognition algorithm based on infrared spectrum

A technology of infrared spectroscopy and lubricating oil, which is applied in the field of engine lubricating oil identification, can solve the problems of inability to be accurate and reliable, and achieve the effect of improving the identification ability

Inactive Publication Date: 2014-06-25
史永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are not yet accurate and reliable

Method used

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  • Engine lubricating oil recognition algorithm based on infrared spectrum
  • Engine lubricating oil recognition algorithm based on infrared spectrum
  • Engine lubricating oil recognition algorithm based on infrared spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: A certain brand of gasoline engine oil 15W40SE and a certain brand of gasoline engine oil 15W40SF are lubricating oils with different quality levels, and their infrared spectra are as follows figure 1 shown.

[0046] The infrared spectra of the two engine lubricating oils are very similar. If the hit rate index is used to measure the similarity between the two, the value is 0.9988, which can be considered to be almost the same. But the actual situation is that although the two engine lubricating oils are from the same manufacturer, the quality grades are different, the additives and their additions are also different, and the infrared spectra are the same as above. The two spectra are similar, but there are obvious differences in details and baselines. The traditional hit The rate index cannot give the difference between the two, and the new spectral similarity evaluation index sim is used, and the similarity index value of the two is 0.9622. The new metric ...

Embodiment 2

[0047] Example 2: The sim values ​​of a certain brand of lubricating oil 15W40CD, a certain brand of lubricating oil 15W40SE and a certain brand of lubricating oil 15W40SF are shown in Table 1:

[0048] Table 1 Similarity of a certain brand of lubricating oil 15W40CD, a certain brand of lubricating oil 15W40SE and a certain brand of lubricating oil 15W40SF

[0049]

[0050] Three engine oils have the same viscosity grade but differ in quality grade, and a new similarity metric can be used to measure the difference between any two. A brand of lubricating oil 15W40CD is a diesel engine oil, and the similarity index values ​​with the latter two are 0.9621 and 0.9764, respectively, while the two gasoline engine oils are relatively similar, with a sim index value of 0.9817. The new spectral similarity evaluation index sim can correctly distinguish the three engine lubricants with similar spectra. The infrared spectra of the above three lubricating oils are as follows: figure ...

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Abstract

The invention discloses an engine lubricating oil recognition algorithm based on an infrared spectrum. The engine lubricating oil recognition algorithm is mainly realized by two steps of obtaining a new spectral similarity evaluation indicator sim and applying the new spectral similarity evaluation indicator sim to distinguish lubricating oil. Compared with the prior art, the engine lubricating oil recognition algorithm has the most obvious characteristics that a variable importance degree is introduced into a fingerprint spectral similarity evaluation indicator so as to overcome the disadvantages of an existing algorithm that a small change spectrum can not be effectively distinguished, caused by the fact that the variable importance degree is not considered; furthermore, the recognition capability of the similarity evaluation indicator on the small change spectrum is improved.

Description

technical field [0001] The invention relates to a method for identifying engine lubricating oil, in particular to an algorithm for identifying engine lubricating oil based on infrared spectrum. Background technique [0002] The composition and structure of engine lubricating oil are very complex, and there are many varieties. Misunderstanding, OEM, adulteration and counterfeiting are common in the market. How to distinguish the authenticity has become a thorny problem that plagues producers, sellers and users. Therefore, solving the identification problem of engine lubricating oil has important practical significance. Manufacturers can protect their own interests and maintain their brand image through discrimination. Sellers can enhance the reliability of agent products and improve their reputation through discrimination. Through the identification of lubricating oil, users can determine the authenticity and ensure the use of genuine lubricating oil with guaranteed quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3577
Inventor 史永刚李华峰龚海峰文昊孙萍
Owner 史永刚
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