A novel method of steel tape zero calibration  

一种新型钢卷尺零位标定方法（英文）

作　　者：LI Yi-ming WANG Zhong CHEN Xi LU Rui-jun 李一鸣;王仲;陈曦;路瑞军(天津大学精密测试技术及仪器国家重点实验室,天津300072)

机构地区：[1]State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University,Tianjin 300072,China

出　　处：《Journal of Measurement Science and Instrumentation》2018年第2期103-108,共6页测试科学与仪器（英文版）

摘　　要：In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was proposed.Standard datum planes and standard scales were designed as standard component,and the indication error can be calculated by comparing the standard component and the measured value between zero position and 500 mm scale.The alignment of scribed lines was realized by machine vision,and the float pixel equivalent method was applied in image process.Experimental results prove that this system meets the requirement of national standard steel tape verification regulation,and the repeatability of zero error can reach 0.006 mm after zero calibration.

关 键 词：zero calibration zero scale collimation movable hook structure standard datum planes and standard scales float pixel equivalent 

分 类 号：TH711.2[机械工程—测试计量技术及仪器]