农业机械学报2017，Vol.48Issue(4)：250-256,7.DOI:10.6041/j.issn.1000-1298.2017.04.032
基于加速度补偿的土壤紧实度测量方法与传感器设计
Soil Compactness Measuring Method Based on Acceleration Compensation and Sensor Design
摘要
Abstract
In view of the present measurement of soil compactness based on the cone index,eliminating the influence of soil friction on compactness measuring is impossible.It needs to ensure sensor is inserted into the soil at constant speed,thus it is difficult to use and the accuracy is not high.In order to improve the real-time measurement precision and maneuverability of soil compactness,a real-time soil compactness detection sensor was designed based on the cone index,and the synchronous measurement of acceleration was realized,which eliminated the error caused by different speed in the process of the metal rod inserting into soil,as well as improved soil compactness measuring precision.Homemade sensor had good static characteristics and dynamic characteristics through a large number of test.Measuring range was 0 ～7 800 kPa,sensibility was 0.041 896,the stability of the standard deviation was 5 kPa,measuring accuracy was ±0.02％ FS,overshoot was 7.81％,and transient time was 0.632 s.Compared with SC-900 soil compactness meter of the United States,its accuracy of the linear fitting coefficient of decision reached more than 0.96.The results showed that the homemade soil compactness sensor and SC-900 soil compactness meter had consistency of performance in the actual measurement,and homemade soil compactness sensor was more convenient and cheaper.关键词
土壤紧实度/传感器/加速度/圆锥指数/静态特性/动态特性Key words
soil compactness/sensor/acceleration/cone index/static characteristics/dynamic characteristics分类
农业科技引用本文复制引用
于文华,田昊,梁超,李成豪,赵燕东..基于加速度补偿的土壤紧实度测量方法与传感器设计[J].农业机械学报,2017,48(4):250-256,7.基金项目
国家自然科学基金项目(31371537)、北京市科技计划项目(Z116100000916012)和北京市共建项目专项 （31371537）
