A Measuring Method for Material Flow of Screw Conveyor

Abstract

The invention discloses a method for measuring the material flow of a spiral conveyor. The method comprises the steps that firstly, an industrial camera and a laser device are calibrated, and a line laser reference line is selected; a laser triangulation method is used, and the industrial camera shoots images of surface laser shape changes of grains irradiated by line lasers and pushed by a spiralblade when the spiral conveyer conveys the grains, the images are processed in real time, and the relation between image information and the volume of pushed materials is established; the volume flowof the materials pushed by the spiral conveyor and the total volume of the accumulated materials are obtained. The volume flow of the materials pushed and transported by the spiral conveyor is measured in real time through the laser triangulation method, the measuring method can be used for a general spiral conveyor and particularly a grain conveying auger of a grain combine harvester, a new measuring method is provided for field yield monitoring, meanwhile, the precision of the laser measurement method is high, the measuring effect is stable, and the yield monitoring precision can be improved.

Description

technical field [0001] The invention belongs to the technical field of measurement, and relates to a method for measuring material flow of a screw conveyor. Background technique [0002] When a combine harvester harvests grain, real-time yield is one of the most important information that needs to be obtained in precision agriculture. It can directly reflect the impact of soil, pesticides, pests, etc. on yield. Based on this information, producers can scientifically control the farmland, so as to save costs, increase production, and reduce pollution. Obtaining grain regional yield information and establishing a yield spatial distribution map are the starting point for the implementation of precision agriculture, so real-time and accurate measurement of yield becomes the key. [0003] At present, there are many methods of production measurement, which are mainly divided into the following categories, weighing method, impulse method, γ-ray method, and volume method; many fore...

AI Technical Summary

Problems solved by technology

Ma Chaoxing of Jiangsu University proposed to use laser sensors for thickness measurement, and then measure flow according to grain bulk density and transmission speed, but it is easily affected by rice thickness

Zhang Xiaochao and others designed the weighing sensor, which made too many changes to the harvester and was easily affected by the vibration of the harvester

[0005] The existing yield measurement methods, weighing, volume, and impulse are easily affected by external environmental factors, and the equipment such as harvesters has been changed too much, so they cannot effectively reflect real-time grain yield information.

Although the γ-ray method has high precision, it is radioactive and has a certain impact on the grain itself.

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