文献类型： 外文期刊

第一作者： Zhou, L. M.

作者： Zhou, L. M.;Niu, K.;Chen, K. K.;Yuan, Y. W.;Xue, B.;Wang, L. L.;Chen, K. K.

作者机构：

关键词： Fertilizer applicator; Capacitive sensor; CAN bus; Flow monitoring

期刊名称：INMATEH-AGRICULTURAL ENGINEERING （ 影响因子：0.7； 五年影响因子：0.6 ）

ISSN： 2068-4215

年卷期： 2022 年 66 卷 1 期

页码：

收录情况： SCI

摘要： Precision fertilization is one of the important links in the precision agricultural operation system. In recent years, the demand for precision fertilization in facility greenhouse has become more and more urgent. As such, this paper designs an accurate and practical fertilization on-line monitoring system. The system adopts capacitance conversion chip PCAP01 and SCM STM32F103C8T6 to build a capacitance detection circuit. The effective acquisition of differential capacitance sensor microcapacitor signal output under this system is realized. The response relationship between the mass flow and the sensor capacitance output was studied, and a linear fitting model of fertilization was established. According to the prediction, the model determination coefficient was 0.9997. The experiment shows that the system has good adaptability to ambient temperature. The average measurement error is 1.13%, which meets the technical requirements of flow measurement. The capacitive fertilization online measurement system provides an effective way for the on-line acquisition of fertilization flow. It is of great significance for the implementation of high-precision variable fertilization.

分类号：