土壤比贯入阻力测试装置研究—基于Android手机WIFI控制

Research on the WIFI Control Soil Penetration Resistance Testing Device—Based on the Android Mobile Phone

土壤比贯入阻力是反映耕地土壤板结程度的一项重要指标。现有测量装置多采用人工手动加载测量的方式,无法依据测量标准保持恒速,准确度、自动化程度及测量效率低,且劳动强度大。为此,应用传感器技术、机械电子技术、无线通信技术,以及智能终端设备设计研制了一种基于Android手机WIFI控制的电动式土壤比贯入阻力测量装置。该装置以单片机传感器为核心,采用电机驱动实现圆锥测头按ASAE S313.3 FEB04标准以3 0.4 8 mm/s恒速贯入土壤,测量数据实时显示并存储于TF卡中;初步设计实现了使用Android手机,通过WIFI通讯与测量装置建立连接、操控测量装置,接收、存储测量数据,并绘制曲线。测试结果表明:该装置结构简单、测量精度高、操作简单、自动化程度高,应用前景广阔。

Soil specific penetration resistance is an important indicator of the study of soil compaction degree .Existing products most use the manual measuring device .Manual operation can＆#39;t keep constant speed and have low degree of intel-ligence , low precision , high labor intensity and low artificial measuring efficiency .For this purpose , use sensor technolo-gy,mechanical and electrical technology ,Wireless communication technology and Intelligent terminal equipment .The cor-responding design was developed based on the Android WiFi control of electrodynamic soil penetration resistance tester . Single chip microcomputer is the core of the device .The device driven by the motor let cone probe penetrate into the soil as the constant speed of 30 .48 mm/s （ the standard of ASAE S 313 .3 FEB04 ） , realize the real-time measurement and data storage in the measuring device .Using Android phones with WIFI communications , the preliminary design realizes establishing connection with measuring device , controlling measurement device , receiving saving measurement data and drawing curve .Test results indicate that the device has simple structure , high precision measurement , simple operation , a high degree of automation and a wide application prospect .