Method for measuring volume of large irregular bulk grain pile based on dynamic three-dimensional laser scanning

Abstract

The invention relates to a method for measuring the volume of a large irregular bulk grain pile based on dynamic three-dimensional laser scanning. The method comprises the following steps of: arranging a guide rail in the middle of the top of a barn along the width direction, wherein the guide rail is provided with a slide block controlled by a stepping motor, and a laser radar scanner is installed on the slide block; moving the slide block from one end to the other end of the top of the barn at a constant speed to drive the laser radar scanner by the slide block to finish scanning on the surface of the whole bulk grain pile, wherein the laser radar device is a one-dimensional scanning device to realize linear scanning and returning coordinate data, and the master control computer is used for transmitting pulses to the stepping motor and processing the signal; acquiring point cloud data of the surface of the bulk grain pile through the master control computer, determining the distribution density of scanned points for calculating the volume according to an allowed error value of the grain pile measured by the user, and calculating the weight of the grain pile according to the grain density provided by the user; and generating a point cloud graphic matrix attached with coordinates through scanning space morphology by guide rail moving type three-dimensional laser, performing surface fitting to form an irregular bulk grain pile appearance, and thus obtaining the volume of the irregular bulk grain pile. The volume of the large irregular bulk grain pile can be rapidly and effectively measured at high precision, and remote monitoring can be realized; and moreover, the method is low in cost and easy to implement.

Description

technical field [0001] The invention relates to a method for measuring the volume of large irregular bulk grain piles based on dynamic three-dimensional laser scanning, which is used in the field of grain storage monitoring. Background technique [0002] Grain reserve is a material reserve system established to ensure consumer demand, adjust the balance of food supply and demand, stabilize food market prices, and respond to major natural disasters or other emergencies. This system directly affects national security. For this reason, real-time supervision and quantitative verification of grain stored in warehouses is the key to safeguarding national interests and food security. It is also the focus and difficulty of grain reserve management. my country's grain reserves are about 300 billion catties, and the annual grain reserve subsidies are about 10 billion yuan. Due to the huge amount of reserves and the huge economic interests involved, various violations and illegal in...

AI Technical Summary

Problems solved by technology

If the grain storage enterprise carries out the business of buying and selling grain at the time of inventory inspection (that is, when the grain is out of the warehouse and in the warehouse), the grain pile will show an irregular shape. At this time, it is impossible to effectively measure the grain quantity in the warehouse, which will affect the entire grain quantity. Statistical and inventory check work

[0005] The measurement of the volume of irregular grain piles is a difficult point in the verification of grain quantity, and it is also a key point in the development of a real-time monitoring system for grain quantity. This problem has not been effectively solved for many years

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