METHOD OF AND DEVICE FOR AUTOMATIC ALLY CHECKING GRAIN MOISTURE IN FLOW OF GRAIN IN DRIER Russian patent published in 2006 - IPC F26B25/22 

FIELD: agricultural engineering.

SUBSTANCE: invention relates to measuring facilities, in particular, to technology and means of checking grain moisture in flow of grain in drier at automatic control of drying process by measuring capacitance. Method of automatic checking of grain moisture in flow of grain in drier comes to measuring current content of grain by capacitive pickup-moisture meter, correcting moisture content depending on influence of external factors, and, when certified moisture is attained, discharging of grain from drier and if grain moisture content exceeds certified value, stopping of discharge of grain and continuing drying of grain. Current value of grain moisture content is found by determining current value of analog signal according to handled grain material from formula: V_i = KX(W_i-W_min) where V_i is current value of analog signal, M; K is moisture-to-analog signal transfer coefficient, M/%; W_i is current value of moisture of rain material under checking, %; W_min is minimum value of moisture of handled grain material, %. Device for automatic ally checking grain moisture in flow of grain in drier has housing with capacitive pickup-moisture meter connected with measuring circuit of indicator unit, microprocessor and correction unit, microprocessor feedbacks connected with grain drier drive and display with grain selector unit connected with microprocessor proposed invention improves accuracy of checking of moisture content in grain flow without delay of moisture signal, accuracy of control of grain drying process, and it provides increase of capacity owing to intensification of drying process, improves quality of dried product, reduces specific expenses and provides ecological efficiency of process.

EFFECT: improved reliability of checking.