| 基于太阳能的土壤含水率远程实时监测仪研制 |
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| 引用本文： | 曾庆欣,李晓东,李光林.基于太阳能的土壤含水率远程实时监测仪研制[J].农机化研究,2012,34(8):143-147. |
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| 作者姓名： | 曾庆欣 李晓东 李光林 |
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| 作者单位： | 西南大学工程技术学院,重庆,400716 |
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| 基金项目： | 重庆市科委科技攻关重点项目 |
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| 摘 要： | 为实现土壤含水率实时监测及数据的远程传输,以太阳能电池及锂电池作为整个系统的能量供给,采用电场法测量土壤含水率;通过GSM网络,利用短消息实现土壤含水率数据的实时传输。电源模块实现太阳能的收集及存储,并对整个系统的电源实现管理。系统将土壤含水率转换成电压信号后,对其整流、A/D转换、计算等相关处理后得到土壤的含水率。利用实时时钟电路与SD卡,可实现每天的数据存储。土壤含水率及系统状态异常信息可通过短消息发送到指定手机或终端。试验表明,当被监测的紫色土或黄壤含水率低于30%时,测量误差小于6%。系统每6h测量并存储一次监测数据,每24h发送一次,其余时间处于休眠状态。在该条件下,3 W的太阳能电池能满足系统的能量需求。如果太阳能电源模块出现故障,导致锂电池无法充电时,系统能发送警告短消息,提醒用户及时排除故障。
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| 关 键 词： | 太阳能电源模块 土壤含水率 电场法 系统监控 电源管理 |
Study of Real Time and Remote Transmit Soil Moisture Testing Instrument Based on Solar Energy |
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| Zeng Qingxin
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Li Xiaodong
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Li Guanglin.Study of Real Time and Remote Transmit Soil Moisture Testing Instrument Based on Solar Energy[J].Journal of Agricultural Mechanization Research,2012,34(8):143-147. |
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| Authors: | Zeng Qingxin Li Xiaodong Li Guanglin |
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| Institution: | (College of Engineering and Technology of Southwest University,Chongqing 400716,China) |
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| Abstract: | In order to real time test the siol moistrue and remote transmit the result,solar energy is used to the system power supply;electric field method is used to test the soil moisture;via GSM networks,short message is used to transmit the test result.Solar energy is collected and stored by solar power module that realize system power management.First of all,the system convert soil moisture to DC voltage,and then implement A/D operation,at last get the result of soil moisture by a serial of computing.All result data combining real-time circut can be stored in SD card.Not only soil moisture data but also abnormal information of the system can be sent to user or terminal by short message.The experiment show that 0 to 30 percentage soil moisture can be detected,the error of the result is about ±6 percentage.The system detect one time every 6 hours,and send result every 24 hours,and then go into sleep mode the rest of time.Under this condition,a 3 watt solar cell can meet the power suplly need.If a fault of solar power module happens,a warn short message is sent to remid user to remove the fault. |
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| Keywords: | solar energy module soil moisture electric field method system monitoring power management |
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