Automatic control system for drying grains

Abstract

The invention discloses an automatic control system for drying grains. The automatic control system comprises a single chip microcomputer processing module, wherein the single chip microcomputer processing module is further connected with a grain moisture sensor, a grain temperature sensor and a three-phase SPWM (Sinusoidal Pulse Width Modulation) wave output module, wherein the three-phase SPWM wave output module is connected with a grain drying machine; A / D (Analogue / Digital) converters are connected between the grain moisture sensor, the grain temperature sensor and the single chip microcomputer processing module respectively; the single chip microcomputer processing module is further connected with a hot air pressure sensor, a hot air temperature sensor and an alarming module; and the three-phase SPWM wave output module is connected with a hot blast stove. The automatic control system for drying the grains, disclosed by the invention, can be used for realizing double control on the grain drying machine and the hot blast stove; and the working states of the drying machine and the hot blast stove can be intelligently and automatically adjusted according to moisture and temperature in the grains, and furthermore, the automation degree of the drying work of the grains is improved.

Description

technical field [0001] The invention relates to the technical field of grain drying machinery, in particular to an automatic control system for grain drying. 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 technical solution acc...

AI Technical Summary

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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