Granary grain storage quantity detection method based on three-dimensional force sensor

Abstract

The invention discloses a granary grain storage quantity detection method based on a three-dimensional force sensor. through arranging the three-dimensional force sensor on the side wall of the granary, the static friction force between the granary wall and the real-time grain quantity can be measured accurately and directly, the grain bulk bottom pressure is acquired through a pressure sensor atthe bottom part of the granary, and through a detection model W=PA+PB (PA is the granary bottom pressure and the PB is the static friction force generated on the grain side surface),, the granary grain storage quantity can be quickly and effectively calculated. The method of the invention has the advantages that simplicity and quickness are realized; the operation is easy; the accuracy is high; through measuring the static friction force between the granary wall and the real-time grain quantity, the granary grain storage quantity can be simulated and calculated; the problem of analyzing and estimating the granary side pressure during the grain detection process is skipped; the granary grain storage quantity detection errors are greatly reduced; theoretical significance is realized for studying the complex pressure distribution inside the granary; and a more direct and effective technical means is provided for grain quantity detection.

Description

【Technical field】 [0001] The invention belongs to the technical field of grain weight detection, and in particular relates to a grain quantity detection method based on a three-dimensional force sensor. 【Background technique】 [0002] Food is the material basis for people's survival and development, and it is also an important strategic material for the country. As one of the three major economic security in the world today, food security is not only the basic condition for realizing the sound and rapid development of the national economy, but also an important guarantee for promoting social stability and harmony. Therefore, how to ensure the authenticity and good quality of food through technical means is of great significance to food security. [0003] As we all know, online detection of grain quantity, as an important technical means to ensure the safety of grain quantity, has been widely used in the field of grain quantity detection in grain storage, and has become the ...

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Problems solved by technology

However, looking at the existing mechanical methods to detect the quantity of grain stored in granaries, it is generally assumed that the static friction between the silo wall and the grain is constant, and by detecting the positive pressure at the bottom of the granary or the positive pressure at the bottom of the granary combined with the positive pressure on the side wall of the granary. However, in reality, the pressure distribution inside the granary is complex and changeable, and the actual static friction coefficient of the grain along the silo wall is not constant, which makes this detection method have certain limitations. , but also greatly reduces the accuracy of grain quantity detection in grain storage

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