土壤比贯入阻力测试装置研究—基于Android手机WIFI控制

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。

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

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'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 .