基于电容式传感器的非接触式液位测量系统  

Non-contact liquid level measurement system based oncapacitive sensor

作　　者：屈梦瑶 易艺[1] 陆泽青 杨宗林 彭雪斌 QU Mengyao;YI Yi;LU Zeqing;YANG Zonglin;PENG Xuebin(School of Information Technology,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息科技学院,广西桂林541004

出　　处：《传感器与微系统》2021年第9期81-84,共4页Transducer and Microsystem Technologies

基　　金：2019年国家级大学生创新训练项目(201913644001)。

摘　　要：为了解决有腐蚀性、有粘附性、强酸、强碱等液体的液位测量,设计了一种非接触式液位测量系统。以STM32作为微控制器,将电容式传感器和三轴陀螺仪/加速度传感器分别安装在容器外壁,获取容器的液位数据和姿态数据;然后进行分析和处理,转换为相应的液位值和液体体积;最后将测量参数通过WiFi模块传输给手机进行显示。液位测量系统电路简单,性能可靠,既可以测量液位值,又可以测量液体体积。实验结果表明:设计的非接触式液位测量系统能够准确测量0~140 mm的液位高度,液位相对误差为5%,为非接触式液位测量提供一种参考。A non-contact level measurement system is designed to measure the level of corrosive,adhesive,strong acid,or strong alkali liquid.STM32 is applied to the system as a micro-controller,and capacitive sensor and three-axis gyroscope/acceleration sensor are installed on the outer wall of the container respectively to obtain the liquid level and attitude of the container.Later,such data will be analyzed,processed and converted into the corresponding liquid level and volume.Finally,the measured parameters will be transmitted to the mobile phone through the WiFi module.The system boasting simple circuit structure and reliable performance can measure both the level and volume.The experimental result shows that the system can accurately measure the liquid level ranging of 0~140 mm with relative error of 5%,it provides a reference for non-contact liquid level measurement.

关 键 词：电容式传感器 三轴陀螺仪/加速度传感器 非接触 液位测量 液体体积测量 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置] TP21[自动化与计算机技术—控制科学与工程]