TOTAL -WEIGHT DETECTION-BASED METHOD AND SYSTEM THEREOF FOR ON-LINE MEASURING AND CONTROLLING MOISTURE IN CIRCULATION DRYING OF GRAIN

摘要

A total weight detection-based method and system thereof for on-line measuring and controlling a moisture in circulation drying of grain. In the method, by detecting a real-time weight of the grain in a drying machine and calculating a real-time average moisture of the grain, process control on circulation drying operation is implemented. The method comprises the following steps: initialization of operation, detection of a tare weight, loading of grain and measurement of an initial total weight W₀, starting of circulation drying operation, monitoring of a circulation drying process, control of the circulation drying process, and the like. A total weight detection-based system for on-line measuring and controlling a moisture in circulation drying of grain according the method comprises a drying machine main body (1), an induced draft fan (3), a grain feeding/discharge elevator (5), and a weighing sensor group (6), wherein the weighing sensor group (6) is arranged below the drying machine main body (1), and used for detecting an initial total weight W₀ of the drying machine loaded with the grain to be dried, a tare weight W_b, and a real-time total weight W_i. The system can accurately measure a weight in a case in which the working of a drying agent is not stopped, and is applicable to circulation drying of crops such as corn, rice and wheat.