用压阻式力敏传感器测量固体密度的误差分析  

Error analysis of measuring solid density with piezoresistive force sensor

作　　者：莫余丽 梁玉娟[1] 尹一焜 熊伟波 MO Yu-li;LIANG Yu-juan;YIN Yi-kun;XIONG Wei-bo(School of ArtificialIntelligenceand Manufacturing,Hechi University,Hechi Guangxi 546300;No.39 Middle School of Liuzhou,Liuzhou Guangxi 545002)

机构地区：[1]河池学院人工智能与制造学院,广西河池546300 [2]柳州市第三十九中学,广西柳州545002

出　　处：《辽宁师专学报（自然科学版）》2021年第2期71-75,共5页Journal of Liaoning Normal College(Natural Science Edition)

基　　金：广西区大学生创新训练资助项目(202010605053);广西区级一流课程《力学》(桂教高教[2021]11号);河池学院课题(XJ2018GKQ018,校教学[2020]15号)。

摘　　要：用阿基米德法测量固体密度,其精确度的提高,在于测量质量时的准确度.利用FB806型固体密度实验仪中的压阻式力敏传感器测量待测样品在空气中、水中的电压,换算成相应的质量、浮力、体积,从而计算出样品的密度.随着科学技术的发展,理论上而言,压阻式力敏传感器称衡法比传统物理天平称衡法更方便、精确度更高,但在实验中发现使用压阻式力敏传感器称衡法常常会产生较大的误差,通过对实验数据分析发现,该实验仪的压阻式力敏传感器的灵敏度低是导致误差大的主要原因.The Archimedes method is used to measure the density of solids and the improvement of its precision lies in the accuracy of mass measurement.The piezoresistive force sensor in the FB806 model solid density tester is used to measure the voltages of the sample in the air and water,which is converted into the corresponding mass,buoyancy,volume,and then the density of the sample is calculated.With the development of science and technology,the piezoresistive force sensor weighing method is more convenient and more accurate than the traditional physical balance weighing method in theory,but it is found that the use of piezoresistive force sensor weighing method often produces larger errors in the experiment.By analyzing the experimental data,it is found that the low sensitivity of the piezoresistive force sensor of the instrument is the main reason for the large errors.

关 键 词：固体密度 FB806型固体密度实验仪 压阻式力敏传感器 

分 类 号：TL81[核科学技术—核技术及应用]