基于LabVIEW的数字式气压计自动检定系统

Automatic Verification and Calibration System of Digital Barometer Based on LabVIEW

摘要:

气压是地面气象观测中的重要观测要素,现阶段气压计主要依赖人工检定,劳动强度大、效率较低且易出现失误；为此提出一种数字式气压计自动检定系统,以实现PTB220和PTB210系列数字式气压计的自动检定。系统依据JJG 1084-2013 《数字式气压计检定规程》设计,主要包括CPC6000型精密压力控制器、745-16B型高精度实验室标准表、多串口扩展卡以及计算机等。论文介绍了系统设计方案,基于LabVIEW开发了自动检定程序,包括压力控制、数据采集、数据处理、报表生成以及传感器调整等模块,并进行了检定实验。结果表明,系统可显著提高检定工作效率,经调整后的气压计测量误差符合要求。

Abstract:

Air pressure is an important observation element in surface meteorological observation. At present, barometers mainly rely on manual verification, which is labor intensive, inefficient and prone to errors. Therefore, an automatic verification system of digital barometers is proposed to realize the automatic verification of PTB220 and PTB210 series digital barometers. The system is designed according to JJG 1084-2013 "Verification Regulations for Digital Barometers", which mainly consist of model CPC6000 precision pressure controller, model 745-16B high precision laboratory standard, multi-serial port extension card and computer, etc. This paper introduces the design scheme of the system, and develops an automatic verification program based on LabVIEW, including pressure control, data acquisition, data processing, report generation and sensor adjustment modules, and carries out verification experiments. The results show that the system can significantly improve the efficiency of calibration, and the measurement error of the barometer which has been adjusted meets the requirements.