Method for determining stem content of tobacco shreds based on near infrared spectrum technology

Abstract

The invention discloses a method for determining the stem content of tobacco shreds based on the near infrared spectrum technology. The method comprises steps of preparing standard tobacco powder samples with different stem contents; collecting a near infrared spectrogram of each standard tobacco powder sample, and carrying out order derivation to obtain a new spectrogram; obtaining a significantfluctuation interval and a standard curve; calculating an Euclidean distance from each new spectrogram to the standard curve in each significant fluctuation interval and adding the Euclidean distancesof the same new spectrogram in all significant fluctuation intervals to obtain a similarity coefficient of each new spectrogram; fitting a relational expression of the stem content and the similaritycoefficient according to the similarity coefficient of each new spectrogram and the stem content of the corresponding standard tobacco powder sample; obtaining the similarity coefficient of to-be-detected tobacco shreds, and calculating the stem content in the to-be-detected tobacco shreds based on the relational expression of the stem content and the similarity coefficient. The method is a brand-new method capable of accurately, quickly and objectively measuring the stem content in the tobacco shreds, and meets the technical requirements of stem content measurement in the prior art.

Description

technical field [0001] The invention belongs to the technical field of cigarette processing, and in particular relates to a method for measuring stem content in shredded tobacco based on near-infrared spectroscopy. Background technique [0002] Cigarette formula design is the core and foundation that affects the sensory quality of cigarettes. The accurate blending of components in cigarette formula, including shredded leaves, shredded stems, and reconstituted tobacco leaves, has a relatively large impact on the physical indicators, smoke characteristics, and especially the intrinsic sensory quality of cigarettes. big impact. Among them, the determination of the stem content in the cigarette formula is the key to judging and evaluating the stem content rate of cigarette shreds and the blending quality of shredded stems in cigarette shreds. [0003] At present, the content of stems in shredded tobacco plays an increasingly significant role in reducing the hazards of cigarette...

AI Technical Summary

Problems solved by technology

This method is relatively simple and easy to obtain, but it has disadvantages such as low detection efficiency, poor accuracy, and large human influence.

With the continuous updating and upgrading of cut stem manufacturing technology, the difference between the shape of cut stems processed by cigarette companies and the shape of leaf cuts is gradually narrowing, making it more difficult to select and measure through artificial vision

In addition, the measurement of expanded shredded tobacco can be based on the difference in apparent density, which can be separated by liquid suspension method and then weighed. The difference effectively separates it from

At the same time, it may be possible to distinguish the blending ratio of cut stems in the cigarette formula through the differences in the conventional chemical components of the tobacco raw materials (total sugar, reducing sugar, total nitrogen, potassium, chlorine, etc.), but there will still be sample differentiation during the measurement process Due to the problems of small precision, poor repeatability and heavy workload, it is not enough to effectively achieve the purpose of accurate and rapid determination of stem content in cigarette formula

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