Pulse spectrum online imaging detection method and device for tobacco shred low-chromaticity-difference plastic foreign matter

Abstract

The invention belongs to the technical field of tobacco shred foreign matter detection, and particularly relates to a pulse spectrum online imaging detection method and device for tobacco shred low-chromaticity-difference plastic foreign matter. The method mainly comprises the three steps of tobacco shred negative-pressure thin-layer feeding, tobacco shred pulse line scanning recognition and foreign matter positive-pressure online removal. According to the invention, tobacco shreds which are in a loose state and are high in cross-linking degree form a fixed and continuous thin layer on the surface of a conveying roller through negative pressure adsorption force, so that the probability of detecting and removing plastic foreign matters with low chromaticity difference in the tobacco shreds is improved; the surface of the roller is subjected to regional coding, so that intelligent linkage between pulse line scanning recognition and positive pressure online removal is realized; and the characteristic signals of the low-chromaticity-difference plastic foreign matters can be efficiently obtained in real time by performing pulse type light emitting on a low-chromaticity-difference plastic characteristic wavelength LED linear array light source and combining with a line scanning camera, so that the limitation of detecting the low-chromaticity-difference plastic foreign matters in the tobacco shreds in the existing conventional technology is overcome, and efficient removal of the low-chromaticity-difference plastic foreign matters in the tobacco shreds is realized.

Description

technical field [0001] The invention belongs to the technical field of foreign matter detection in shredded tobacco, and in particular relates to a pulse spectrum online imaging detection method and device for plastic foreign matter with low chromaticity difference in shredded tobacco. Background technique [0002] The production of shredded tobacco involves many links such as tobacco harvesting, storage, transportation, and processing, which can easily lead to the mixing of different types of foreign matter, thereby affecting the quality of shredded tobacco products. Different from the ingestion of foreign matter in conventional food that will cause tangible physical damage to the teeth, mouth, and esophagus, plastic foreign matter in shredded tobacco can burn synchronously with shredded tobacco due to its low ignition point, and produce irritating, even toxic and harmful gases. It causes invisible chemical hazards to consumers and seriously affects consumers' sensory exper...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a pulse spectrum online imaging detection method and device for plastic foreign matter with low chromaticity difference in shredded tobacco, which is used to solve the problem of difficult identification and removal of plastic foreign matter with low chromaticity difference in shredded tobacco in the prior art

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