水槽式多功能液位计自动检定装置  

Research on automatic calibration device for multi-function liquid level measuring devices in tank type

作　　者：茅静静 王磊 胡志刚 唐军 耿存杰 张东飞 白金超 李雪菁 Mao Jingjing;Wang Lei;Hu Zhigang;Tang Jun;Geng Cunjie;Zhang Dongfei;Bai Jinchao;Li Xuejing(Suzhou Institute of Metrology;Shanghai Institute of Measurement and Testing Technology;Shanghai Water Meter Compulsory Verification Station)

机构地区：[1]苏州市计量测试院 [2]上海市计量测试技术研究院 [3]上海市水表强制检定站

出　　处：《上海计量测试》2024年第3期11-14,18,共5页Shanghai Measurement and Testing

基　　金：上海市市场监督管理局科技计划项目(2024-18)。

摘　　要：为满足不同类型的液位计检定需求,研制了一套多功能液位计检定装置。该装置的量程为0~2 000 mm(MPE=0.35 mm),分辨力为0.01 mm。装置主要由摄像头、不锈钢水箱、被检液位计法兰、钢直尺和压力标准器组成,并采用组态软件编写了上位机,实现了液位计检定的自动化。装置可通过4~20 mA电信号采集,显示液位示值,输出的范围为0~2 500 mm。经过不确定度评定,在测量范围内,该液位计检定装置液位示值的扩展不确定度为0.12 mm(k=2),输出电信号的扩展不确定度为4.0×10^(-3)mA(k=2),可以达到接触式液位计检测要求。To meet the calibration needs of different types of liquid level measuring devices,the team develops a liquid level measuring devices calibration device based on the camera method,with a range of 0-2000 mm(MPE=0.35 mm)and a resolution of 0.01 mm.This device is mainly composed of camera,stainless steel tank,flange of the inspected level measuring devices,steel straightedge,and adopts the configuration software to design the upper computer,which realizes the automation of level meter calibration.In the calibration of the liquid level meter with signal output function can be converted by 4-20 mA electrical signal to display the liquid level indication value,the output range spans from 0 to 2500 millimeters.After uncertainty evaluation,in the measurement range,the extended uncertainty of the liquid level indication value of the level measuring devices calibration device is 0.12 mm(k=2),and the extended uncertainty of the output electrical signal is 4.0×10^(-3) mA(k=2),which can detect the contact level meter with the accuracy class.

关 键 词：接触式液位计 自动化 摄像法 

分 类 号：TH816[机械工程—仪器科学与技术]