关键词: 智能校准, ⁺开放平台通信统一架构, LabVIEW, 可编程逻辑控制器

Abstract: With the requirements of high efficiency,high benefit and high quality,the metrology field set more demands on the efficiency of verification and calibration tasks.The continuous innovation and development of artificial intelligence technology provides a new approach for the intelligent measurement methods.In combination with the actual working conditions of the unit,in order to improve the automation degree of the handheld digital multimeter verification system,combined with robots,industrial cameras,sensors and other devices with intelligent technology,a fully automatic calibration system for the handheld multimeter was developed.In view of how to realize secure and stable real-time data interaction between the system host computer based on LabVIEW and the slave computer based on PLC technology,two communication methods based on the traditional technology of creating Shared variables and OPC UA technology were proposed.Through engineering implementation,the feasibility of communication between LabVIEW and PLC based on OPC UA technology was fully verified.This method of communication had the obvious advantages such as shorter development cycle,higher stability,faster response and more strong real-time.At the same time,the programming workload was reduced,the code was more concise and beautiful,and the maintenance difficulty was reduced.

Key words: Automatic calibration, OPC UA(OPC Unified Architecture), LabVIEW(Laboratory Virtual Instrument Engineering Workbench), PLC(Programmable Logic Controller)