An early detection method and device for worm-eaten grain granules

Abstract

The invention relates to an early detection method and device for worm-eaten grain granules. According to the method, images of single granules by subjecting heated grain granules to be detected to thermal imaging are extracted; characteristic parameters related to the grey value of the image of each granule are extracted, are made dimensionless and adopted as inputs of a built classification model; and whether each granule carries worm or not is determined according to outputs of the classification model. Only by collecting thermal images of the grain granules, early detection of larvae of different hidden type insects can be performed, detection results are accurate, and an imaging process does not destroy integrity of grains, does not need any chemical agent, and is free of generation of harmful compounds. In addition, worm-eaten grain granule detection and counting are automatically performed by a computer in the method, do not require manual participation and do not influence health of workers. The method is a green and nondestructive detection technique.

Description

technical field [0001] The invention belongs to the technical field of grain quality detection, and in particular relates to an early detection method and device for grain insect-eroded grains. Background technique [0002] During grain storage, the harm of stored grain pests is very serious. According to the statistics of the Food and Agriculture Organization of the United Nations, about 5% of the grain in the world is lost due to post-harvest pest erosion every year. If it is due to manpower, material resources and technical limitations, it may reach 20-30%. As a big country in grain production, storage and consumption in the world, our country has a post-harvest loss rate of 8%-12%, and the annual loss of grain exceeds 50 billion catties. Therefore, real-time detection of grain pests has become an urgent problem. Corn weevils, rice weevils, wheat moths and grain beetles are the most serious pests that endanger the safety of my country's grain storage, all of which are ty...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method and device for early detection of grain insect-eroded grains, which are used to overcome the shortcomings of the five existing standard methods for detecting concealed pests, solve the inaccurate detection results of the carbon dioxide production method, and the triketone amino acid reaction method. The use of chemical reagents destroys the integrity of grain samples, the suspension method detects a limited variety of pests, and the X-ray method cannot detect early larval pests and causes radiation damage to the staff.

Images