Design and Experiment on Control System of Self-Propelled Variable-Rate Fertilizer
In order to solve the problem, of backward manure regulation control technology which was not suitable for variable -rate fertilization needs of paddy fertilizing machine,a variable -rate fertilization control system was designed.Based on the domestic and foreign research situations of the variable—rate fertilizing technology, the overall structure and working mechanism of the variable-rate fertilizing machine were described,and control content and strategy were studied, AT89C51single chip was used as a core control element in the control system, hardware and software were designed, and control system was integrated. The variable—rate fertilizing experiment in space and paddy field shows that the working efficiency is up to 6hm2/h, the fertilizing error is less than 5%, and the fertilizing stability variation coefficient is only 6.2%, so the working performance and control system design of the fertilizer is suitable for spreading the fertilizer invariable rate widely and efficiently in paddy field.
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