基于共视法的电压源远程校准方法及一致性评价研究

本文针对传统电压源校准方法存在的问题，提出了一种基于卫星共视法的电压源远程校准方法，该方法以非实物标准传递为基础，实现将标准器置于实验室而无需传递至现场进行远程校准，可解决引入附加误差的问题，通过设计基于共视法的电压源远程校准系统，建立校准模型，根据共视原理，实现标准端和被校端电压值远程比对，完成校准。本文对远程校准方法和传统校准方法在直流0～1 V校准点校准结果进行了对比，结果显示两种方法的校准结果差距在5.2×10^-5 V以内。本文给出了两种方法在直流1 V校准点的不确定度评定过程，并通过传递比较法对两种方法的校准结果进行了一致性评价，结果表明，远程法在1 V校准点的扩展不确定度为9.182 44×10^-5 V(k=2),且校准结果与传统法具有一致性。

Research on the remote calibration method of voltage source based on common-view method and consistency evaluation

In this article, a remote calibration method of voltage source based on the GPS common-view method is proposed to address the problems of traditional voltage source calibration methods. This method is based on the transfer of non-physical standards and can enable the standard to be placed in the laboratory without having to be transferred to the calibrated site for remote calibration. It can solve the problem of introducing additional errors. By designing the voltage source remote calibration system based on the common-view method, the calibration model is formulated. According to the common-view principle, remote comparison of voltage values between the standard side and the calibrated side can be achieved, and remote calibration of the voltage source can be completed. The calibration results of the remote calibration method and the traditional calibration method at the DC voltage 0~ 1 V calibration point are compared. The results show that the difference between the voltage differences measured by the two methods is within 5. 2×10 -5 V. The uncertainty evaluation process of the two methods at the DC voltage 1 V calibration point is given, and the consistency evaluation of the calibration results of the two methods is carried out by the transfer comparison method. The uncertainty evaluation results show that the extended uncertainty of the remote calibration method at the 1 V calibration point is 9. 182 44×10 -5 V ( k = 2). The calibration results of the remote method are consistent with the traditional results of the remote method.