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当前位置: 首页 > 文章 > 车载式土壤电导率与机械阻力实时测量系统 农业机械学报 2019 (1) 102-107
Position: Home > Articles > 车载式土壤电导率与机械阻力实时测量系统 Transactions of the Chinese Society for Agricultural Machinery 2019 (1) 102-107

车载式土壤电导率与机械阻力实时测量系统

作  者：
孟超;杨玮;张淼;韩雨;李民赞
单  位：
中国农业大学
关键词：
土壤;电导率;机械阻力;测量系统
摘  要：
土壤电导率与土壤机械阻力是测定土壤理化特性的基础.为了在复杂农田环境中实时、快速检测这两种参数,开发了一种以圆盘犁和深松犁钩作为测量传感器电极的车载式土壤电导率与土壤机械阻力同步实时测量系统,测量原理分别依据电流-电压四端法与应变片电桥法.在室内土槽中对车载式同步实时测量系统进行仿真实验,电导率测量值与实际值R2为0. 926 8,机械阻力测量值与实际值绝对误差为0. 2~2. 7 N,系统稳定性实验结果的电压标准差为:电导率0. 059 764 m V,3组应变片电桥依次为0. 230 42、0. 102 203、0. 109 624 m V,压力传感器0. 172 511 m V,说明该系统有较高的精确度、稳定性以及可行性.
作  者：
MENG Chao;YANG Wei;ZHANG Miao;HAN Yu;LI Minzan;Key Laboratory of Modern Precision Agriculture System Integration Research,Ministry of Education,China Agricultural University;
关键词：
soil;;electrical conductivity;;mechanical resistance;;measurement system
摘  要：
Soil conductivity and soil mechanical resistance are the basis for determining the physical and chemical properties of soil,and soil texture and soil structure can be estimated. A vehicle-mounted realtime measurement system based on the current-voltage four-terminal method and the strain gauge bridge principle was designed and developed. It can be measured while plowing the ground, and can simultaneously measure soil conductivity and soil mechanical resistance. The system used a disc plow and a deep loose hook as the measuring sensor electrode. It had the functions of data measurement,transmission,display and storage,and had the characteristics of real-time,stability and accuracy. After the system was calibrated,the laboratory was tested in the laboratory. The conductivity part R~2 was 0. 926 8 and the absolute error of the mechanical resistance part was 0. 2 ～ 2. 7 N,indicating high accuracy and feasibility. The system needed to be further refined and improved through a large number of farmland experiments. It was hoped that more measuring sensor electrodes can be added later to determine more soil physical and chemical properties.

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