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1、基于电容信号的排种监测系统研究田雷衣淑娟尧李慧李衣菲李爱传刘坤刘英楠後畅黑龙江八一农垦大学黑龙江农垦建三江管理局鸭绿河农场党委组织部摘要:为了对排种器性能可靠性进行分析,针对电容传感器对排种监测的可行性进行分析,对基于电容传感器的排种监测系统进行深入的研究。对相邻两粒种子的下落速度与吋间进行分析与计算,确定了电容传感器在导种管上的装配位置。根据导种管的结构确定丫3种电容传感器的结构,分别为极板对置式、E型极板式与三极板差动式电容传感器。最终,通过试验与数据分析选择了E型极板式电容传感器作为排种监测系统的传感器类型。同时,设计了以单片机MSP430
2、F169、电容-数字转换芯片AD7151作为核心的微小电容检测电路。通过对于检测电容值的比较与分析,可以对排种器工作中种箱排空、种管阻塞、漏播、覆播、正常播种进行实时监测,从而更好地改进排种器与导种管的结构,使播种机工作效率大大增加。关键词:排种器;电容;传感器;监测系统;作者简介:田雷(1989-),男,黑龙江大庆人,硕士研究生,(E-mail)1216751249@qq.com。作者简介:衣淑娟(1965-),女,山东栖霞人,教授,博士生导师,(E-mail)273601140@qq.com。收稿日期:2016-11-17基金:“十二五”国家
3、科技支撑计划项0(2014BAD06B04,2014BAD06B01-24)KindofMonitoringSystemBasedonCapacitanceSignalResearchTianLeiYiShuJuanYaoLihuiLiYifeiLiAichuanLiuKunLiuYingnanXuChangHeilongjiangBayiAgricultureUniversity;DuckGreenRiverSanjiangFarmPartyCommitteeOrganizationDepartment,HeilongjiangAgricult
4、uralReclamationConstructionAdministration;Abstract:Inordertoformeteringdeviceperformancereliabilityisanalyzed,throughthecapacitancesensorformonitoringdeviceoffeasibilityanalysis,fortherowofkindofmonitoringsystembasedoncapacitancesensorin-depthresearch.Forthewhereaboutsofadjac
5、enttwoseedrateandtimeareanalyzedandcalculated,determinethecapacitancesensorontheguideofpipeassemblyposition.Accordingtotheguideofpipestructuredeterminethestructureofthethreekindsofcapacitivesensor,respectively,plateoftype,Etypepoleplateandthreeplatedifferentialcapacitivesenso
6、rs.FinallythroughthetestanddataanalysistochoosethetypeEpoleplatecapacitancesensorsasrowofkindoftypesofsensormonitoringsystem.Smal1capacitancedetectioncircuitisdesignedwithsingle-chipmicrocomputerMSP430F169,capacitanceAD7151-digitalconversionchipasthecoreofsmallcapacitancedete
7、ctioncircuit.Throughthecomparisonandanalysisofthedetectioncapacitancevalue,canworkformeteringdeviceinthetankemptying,leakageofpipeobstruction,sowing,sowing,normalsowingforreal-timemonitoring,soastoimprovethestructureofthemeteringdeviceandtheguideofpipe,makesthemachineworkeffi
8、ciencygreatlyincreased.Keyword:meteringdevice;capacitance;thesensor;