计算机技术与发展2016，Vol.26Issue(11)：144-147,4.DOI:10.3969/j.issn.1673-629X.2016.11.032
基于ARM的液体表面张力系数测量系统设计
Measurement System of Liquid Surface Tension Coefficient Based on ARM
摘要
Abstract
In order to solve the problems such as low precision and poor stability in the experimental instrument of traditional liquid sur-face tension coefficient,a liquid surface tension coefficient instrument based on ARM microprocessor is designed. The STM32 which has powerful functions and high frequency is used as the controller to improve the experimental device for measuring the liquid surface tension coefficient with pull-off method. This system uses HX711 to amplify the electric signal output from the force sensor,and converts the an-alog signal to digital signal. The median average filtering algorithm is used to filter. The static characteristic of the sensor is calibrated,get-ting the linear relationship between features,and the error of the measuring system is analyzed. The LCD screen is used to display the size of the tension directly which improves the efficiency of the measurement. The experimental results indicate that compared with the tradi-tional instrument,this liquid surface tension coefficient instrument improves the measurement accuracy effectively,decreases the errors and has good repeatability.关键词
表面张力系数/STM32/力敏传感器/拉脱法/HX711Key words
surface tension coefficient/STM32/force sensor/pull-off method/HX711分类
信息技术与安全科学引用本文复制引用
徐富新,杨晓津,刘雁群..基于ARM的液体表面张力系数测量系统设计[J].计算机技术与发展,2016,26(11):144-147,4.基金项目
国家自然科学基金资助项目(61178017) （61178017）
