【作者】 陈本华； 杨林章；

【Author】 Chen Benhua Yang Linzhang (The Institute of Soil Science,Academia Sinica,Nanjing 210008)

【机构】 中国科学院南京土壤研究所；

【摘要】 最新研制的RYY4—1型土壤湿度仪,在土壤水分传感器的终端显示土壤水吸力。土壤水分的测定是由土壤水分传感器完成的。RYY4—1型土壤湿度仪,是对土壤水分传感器采用又一次传感的方式(即二次传感方式),即用压阻传感电流变送(4～20mA,输送距离1000m)的方式,来对土壤水吸力信号进行数字化处理的仪器。本文将详细介绍和分析RYY4—1型土壤湿度仪的室内外计量标定过程。更多还原

【Abstract】 Soil moisture-measuring instrument (model RYY4-1),which can display soil water suction,is terminal display system of soil moisture sensor by transferring soil suction from electrical signal to digital signal with pressure-sensor (model 4-20ma,transportation distance 1000m).Soil.moisture sensor is the principal part of the instrument,which is used to determine soil moisture content.The principle texture and the principle of second sensor are studied in this paper,which is based on the further analysis of scaling,principle,object,method and conclusion of soil moisture-determining instrument (model RYY4-1).更多还原