Automatic control method of grain drying system

Abstract

The invention discloses an automatic control method of a grain drying system. The automatic control method of the grain drying system comprises the steps that information collection is achieved through a data collection module; a collected analog value is converted into digital quantity through an A / D converter and then is input into a single-chip microcomputer processing module; and the single-chip microcomputer processing module adjusts the output pulses of a three-phase sinusoidal pulse width modulation (SPWM) wave output module connected with a grain drier and a hot blast stove according to a preset value and the collected value, so that the working frequency of the grain drier and the working frequency of the hot blast stove are adjusted, and automatic adjustment and control of the grain drier and the hot blast stove are achieved. By the adoption of the automatic control method of the grain drying system, dual control over the grain drier and the hot blast stove can be achieved, the working state of the drier and the working state of the hot blast stove are adjusted intelligently and automatically according to the moisture and temperature in grain, and the automation degree of grain drying work is further increased.

Description

technical field [0001] The invention relates to the technical field of grain drying process control, in particular to an automatic control method for a grain drying system. Background technique [0002] my country is the largest grain producer and consumer country in the world, but at present most of the grain drying still relies on the traditional natural drying method. Mildew, etc., have caused huge losses, so the use of grain dryers has become very necessary, but the existing grain dryers are mainly manual operations, with a low degree of automation, resulting in high energy consumption and low efficiency of the dryers. And the operation is inconvenient. [0003] Chinese patent CN102679711A proposes an automatic control device for a grain dryer, which can automatically adjust the operating frequency of the dryer according to the moisture and temperature in the grain, realize intelligent control, and improve the degree of automation of the grain dryer. However, the technic...

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Problems solved by technology

However, the technical solution according to this patent can only automatically control the grain dryer part, and cannot control the other main machine for grain drying - the hot blast stove.

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