数字多用表示值误差测量不确定度自动评定的设计

针对数字多用表型号多、校准项目多，校准后应给出整个测量范围内的测量结果不确定度，采用手动进行不确定度评定费时费力、容易出错、工作效率低等问题，在VEE Pro软件开发平台上，设计开发出数字多用表示值误差测量结果不确定度自动评定系统。该系统包括带接口数字多用表不确定度评定和不带接口数字多用表不确定度评定两个模块，可自动进行不确定度评定及存档。同时结合实例，给出了直流电压示值误差测量不确定度评定结果。使用结果表明：该系统操作简便，提高了工作效率及准确度，减小了人为误差。

Design of Automatic Evaluation of Measurement Uncertainty for Indication Error of the Digital Multimeter

According to the fact that the digital multimeter was detected have problems like various types, multipex calibration items and after the calibration, the uncertainty of the evaluation results should be given within the whole test range. Manual uncertainty evaluation was proved to be time-consuming, laborious, inefficient and prone to errors. Based on the VEE Pro software-exploiting platform, the system of automatic evaluation of uncertainty of measurement result of indication error of digital multimeter was developed. The system contains two moulds, the evaluation of uncertainty of digital multimeter with interface and the evaluation of uncertainty of digital multimeter without interface. Besides, the system could be automatically evaluated and saved the uncertainty data. And the uncertainty evaluation results of the indication error of dc voltage with examples could be showed up. The results show that the system is easy to operate; it can improve the working efficiency, reduce the man-made error and ensure the accuracy of test data.