基于信息处理的玻璃量器自动检定装置设计

Design of automatic verification device of glass gauge based on information processing

摘要

为解决传统人工玻璃量器检定中手动加液频繁、人眼读数易疲劳、数据处理烦琐及精度效率低下的问题,满足批量、多规格玻璃量器的检定需求,提出了一种基于图像处理的玻璃量器自动检定装置和软件系统。装置采用相机替代人眼检测工作,借助图像处理技术精准识别量器刻度线与液位,软件系统实现原始记录留存、检定证书自动生成等核心功能,大幅减少操作人员的重复性劳作,提升检定工作效率与计量数据的准确性。分别用5 mL、50 mL、2 000 mL3种规格量筒,进行自动检定与人工检定对比实验,检测不同检定点的实际体积与扩展不确定度。实验结果表明,该自动检定装置的检定结果均满足量筒容量允差与扩展不确定度指标要求,且检定精度、效率均优于人工检定,验证了装置的可行性与实用性,可替代人工完成玻璃量器检定工作,降低检定成本。

Abstract

To address the problems of frequent manual liquid addition, easy fatigue in human eye reading, cumbersome data processing, and low accuracy and efficiency in traditional manual verification of glass measuring instruments, as well as to meet the verification requirements of batch and multi-specification glassware, an automatic verification device and software system for glass measuring instruments based on image processing is proposed. The device uses a camera instead of human eyes for detection, and accurately identifies the scale lines and liquid level of the measuring instrument with image processing technology. The software system realizes core functions such as original record storage and automatic generation of verification certificates, which greatly reduces repetitive work for operators and improves verification efficiency and the accuracy of measurement data. Comparative experiments between automatic and manual verification are carried out on graduated cylinders of three specifications: 5 mL, 50 mL, and 2 000 mL, with the actual volume and expanded uncertainty at different verification points measured. The experimental results show that the verification results of the automatic device fully meet the index requirements of capacity tolerance and expanded uncertainty for graduated cylinders, and its verification accuracy and efficiency are both superior to manual verification. This verifies the feasibility and practicability of the device, which can replace manual operation in glass measuring instrument verification and reduce verification costs.

关键词

玻璃量器 / 信息处理 / 液位检测 / 自动检定装置 / 图像处理 / 系统设计

Key words

glass container / information processing / liquid level detection / automatic detection device / image processing / system design