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低功耗农业大棚温湿度测量仪设计 总被引:1,自引:0,他引:1
根据农业大棚温湿度控制的实际需要,设计了基于MSP430F427的低功耗温湿度测量仪。MSP430 F427连接温湿度传感器SHT10,对农业大棚内的温湿度进行采集,将测量的结果在液晶屏上实时显示,并将数据进行存储。测量仪采用锂电池供电,结合MSP430F427的低功耗睡眠模式与传感器SHT10的定时断电,单节锂电池充满电后能使测量仪连续稳定地工作6个月以上,并且系统可扩展太阳能充电功能。同时,给出了设计的结构框图,详细描述了温湿度采集电路、USB接口通讯电路、段式液晶显示电路和锂电池供电电路等硬件电路设计,最后给出了系统软件程序流程图。试验证明,该温湿度测量仪能够准确地采集到农业大棚内的温湿度数据,为合理安排农业生产提供了充分的依据。 相似文献
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<正>(1)微机型继电保护测试仪装置内置了工控机和Windows操作系统,勿过于频繁地开关主机电源。(2)微机型继电保护测试仪装置面板或背板有USB插口,允许热插拨USB口设备(如U盘等),但注意插拨设备一定要在数据传输结束后进行。(3)为了保证工控机内置的Windows操作系统能稳定可靠运行,不要随意删除或修改硬盘上的文件和桌面上的图标,不要随意操作、更改、增加、删除、使用内置Windows系统,以免导致操作系统损坏。使用U盘拷贝数据时一定要保证U盘干净无病毒,也不要用U盘在系统中安装其他软件程序。(4)外接键盘或鼠标时,勿插错端口,否则Windows操作系统不能正常启动。(5)勿在输出状态直接关闭电源,以免因关闭时输出错误导致保 相似文献
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基于CC1100的温室温湿度监测系统 总被引:4,自引:1,他引:3
针对传统温室温湿度监测系统的弊端,介绍了一种基于CC1100的温室温湿度监测系统的设计方案.系统采用数字式温湿度传感器SHT10进行数据采集,利用无线传输芯片CC1100实现数据短距离无线收发,满足温室温湿度监测的实时性和可靠性要求.实验证明,温室温湿度监测系统成本低,功耗低,体积小,传输可靠,具有很好的应用前景. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献
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