摘要
针对目前播种行表层土壤坚实度的获取需人工二次进地测量、实时性差等问题,设计了基于Zig Bee技术的播种行表层土壤坚实度采集系统。该系统利用传感器测量镇压轮轮辐伸缩量,建立了镇压轮轮辐伸缩量与土壤坚实度之间的数学模型;选用CC2530主控芯片实现模块控制、数据无线传输的功能。子节点主控芯片CC2530与传感器相连,将传感器的测量数据发送给主节点;主节点接收子节点和车速传感器数据;根据数学模型实现土壤坚实度的测量。为评估系统性能,进行田间试验,结果表明:通过对比系统得到的土壤坚实度与人工测量坚实度,发现二者之间的相对误差平均值为6.3%,相对误差最大值为13.3%。该系统能够实现播种行表层土壤坚实度信息的实时采集和无线传输,可为镇压力的实时调整提供技术支撑。
At present,acquisition of soil compaction for sowing line surface needs people to get into the field again after the operation of agricultural machinery,which is labor intensive,time consuming and belongs to non-real-time measurements. A soil compaction acquisition system for sowing line surface was designed based on Zig Bee technology. A linear displacement transducer was used as measuring sensor to measure expansion amount of wheel spoke of press wheel in the system,and CC2530 was chosen as main control chip to realize module control and data wireless transmission. The main control chip CC2530 and the sensor were connected at child node to collect and store the measurement data of the sensor. The measured data of the sensor were sent to the main node. The main node received data from the child node and vehicle speed sensor,and the soil compaction measurement was realized based on mathematical model. The mathematical model was established based on the relationship between expansion amount of wheel spoke of press wheel and soil compaction to realize data acquisition of soil compaction. Field test was conducted to validate the system＇s performance,which showed an average relative error of 6. 3%and maximum relative error of 13. 3%. The system can realize real-time acquisition and wireless transmission of soil compaction information for sowing line surface,which can provide technical support for real-time adjustment of pressure.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2015年第12期39-46,61,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
'十二五'国家科技支撑计划资助项目(2014BAD06B03)
国家自然科学基金资助项目(31401284)
