水平贯入式土壤压实度测试系统及试验研究

发布时间：2018-06-26 10:14

  本文选题：土壤压实度 + LabVIEW　； 参考：《土壤通报》2017年04期

【摘要】：针对土壤压实度检测的需求,本研究应用CFBLS-100型拉压传感器和基于PCMCIA总线的DAQP-12数据采集卡,在LabVIEW环境下设计了一套土壤压实度现场测试系统。该系统能够实时显示传感器输出电压及所对应的压力变化曲线,并将所采集到的数据存储到计算机中,完成对数据的分析。经标定试验证明:该测试系统所拟合的方程为线性,其相关系数较高,线性度较好,灵敏度较高,系统精度等级小于1级,工作时系统稳定可靠。由室内试验知,在不同水平分层处,土壤压实度与不同模拟压力间均表现出3次多项式的函数关系,显著性较强(α0.05)。且在不同模拟压力下,不同土壤水平分层处的土壤压实度和土壤容重表现出相似的特性,随着模拟压力的增加和土壤分层逐步加深,土壤压实度和土壤容重的增加趋势趋于一致。为研究作物地下组织与土壤之间的根土系统及合理耕层的构建提供理论基础,并为农业机械的研发具有一定的意义。
[Abstract]:In order to meet the demand of soil compaction measurement, a field testing system of soil compaction was designed in LabVIEW by using CFBLS-100 tension and compression sensor and DAQP-12 data acquisition card based on PCMCIA bus. The system can display the output voltage of the sensor and the corresponding pressure curve in real time, and store the collected data in the computer to complete the analysis of the data. The calibration test shows that the equation fitted by the system is linear, its correlation coefficient is higher, linearity is better, sensitivity is higher, the accuracy of the system is less than 1, and the system is stable and reliable. The results of laboratory experiments showed that the degree of soil compaction and the simulated pressure showed the function of cubic polynomial at different levels of stratification, and the significance was strong (伪 0.05). Under different simulated pressures, the soil compaction degree and soil bulk density at different soil levels showed similar characteristics. With the increase of simulated pressure and the deepening of soil stratification, The increasing trend of soil compaction degree and soil bulk density tends to be consistent. It provides a theoretical basis for the study of the root soil system and the construction of rational tilling layer between crop underground tissue and soil, and has certain significance for the research and development of agricultural machinery.
【作者单位】： 昆明理工大学现代农业工程学院;昆明理工大学建筑与城市规划学院;
【基金】：农业部公益性行业(农业)科研专项(201503119);农业部专项(KKGW201623001)资助 云南省科技厅面上项目(2015FB125) 省级项目(人培)(KSY201323139)
【分类号】：S151.92
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本文编号：2070036