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Design and experiment of centralized pneumatic deep precision fertilization device for rice transplanter

International Journal of Agricultural and Biological Engineering 2020年第6期13卷 109-117页

作者： Xiantao Zha Guozhong Zhang Shijie Zhang Qunxi Hou Yang Wang Yong Zhou College of Engineering Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture and Rural AffairsWuhan 430070China

To improve the precision of deep fertilization of paddy fields,a six-row centralized pneumatic deep precision fertilization device for a rice transplanter was *** device included a spiral fertilizer distribution system,centralized pneumatic fertilizer delivery system,an opener system,and a fertilization control *** centralized airflow distribution method was used in the fertilizer delivery system to ensure that the airflow in each fertilizer pipe was evenly *** rotational speeds of the power take-off(PTO)and fertilizer shaft were measured synchronously using photoelectric sensors and matched proportionately in real-time using PID closed-loop control algorithms to achieve precise fertilization rates at each working speed of the rice *** were two key considerations in the design of the control system to ensure precise ***,a photoelectric sensor was used to measure the speed of the PTO;the high rotational speed of the PTO could provide a high signal frequency and improve the precision of the measurement of the transplanter’s working ***,the fertilizer shaft speed measurement subprogram was set to sleep for a short period to reduce the vibration caused by the *** the tests of pneumatic fertilizer delivery system,single-factor tests on airflow distribution methods were *** results showed that the coefficient of variation of the airflow speed for the centralized airflow distribution method was 1.67%,which was the least among the coefficients of the three distribution *** the bench tests,the rotational speeds of the fertilizer shaft were set at 10 r/min,20 r/min,30 r/min,and 40 r/*** maximum coefficient of variation of the fertilization consistency in different rows was 1.49%at the rotational speed of 20 r/*** maximum coefficient of variation of the fertilization stability was 2.86%at the rotational speed of 40 r/min,while the average fertilizer amount per lap for ea

关键词： agricultural machinery deep precision fertilization pneumatic variable rate transplanter vibration elimination

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