基于压差传感器的自记录盘式负压入渗仪设计  

Design of automated disc infiltrometer based on differential transducer

作　　者：林琳[1,2] 陈捷[2] 张中彬[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]中国科学院南京土壤研究所,江苏南京210008

出　　处：《传感器与微系统》2011年第2期94-96,100,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(NSFC40701071);中国博士后科学基金资助项目(20100471139)

摘　　要：为了解决入渗数据人工观测过程中的劳动量过大和读数误差问题,设计了利用压差传感器与数据采集器联合运行,自动搜集入渗数据的自记录盘式负压入渗仪。对盘式负压入渗仪原理与各部件组成,压差传感器与储水管的联合运行机制,以及数据采集器采用的数学处理过程进行了研究。通过自由入渗、室内土柱入渗和田间入渗实验3种方式逐步校验了该仪器读数的准确性和应用的可靠性。In order to solve the problem of large amount of labor and the error of readings during the manual measurement, a simple automated disc infihrometer is designed. It links a differential transducer and a data logger and gets infiltration data automatically. The principle and components of the disc infiltrometer, the combination mechanism of the differential transducer with the water storage pipe, and mathematical process used in the data logger are studied. The accuracy of data readings and reliability of application of the device is verified by the tests of free infiltration, soil column infiltration and field infiltration.

关 键 词：压差传感器 水力传导度 空间变异 数据采集 

分 类 号：S152.7[农业科学—土壤学]