中文摘要：

为了全面分析寄生式时栅误差和不确定度来源,提高寄生式时栅的测量精度,建立符合国际GUM规范检测结果的不确定度评定模型,以84对级的寄生式时栅为研究对象,根据其测量原理分析所测量角度的计算公式,进而将不确定度来源分为插补脉冲个数的误差、插补脉冲信号的量化误差、行波信号的周期误差和环境误差四大类,从理论上建立各不确定度分量之间的理论传递关系,应用现代不确定度理论,推导出合成测量不确定度计算公式。搭建实验平台,利用示波器等仪器的测量结果评定各不确定分量具体数值大小,计算被测角度的合成测量不确定度值。通过与寄生式时栅整圆周的实际测量误差相比较,可以看出利用该评定方法评定的传感器角度测量不确定度与实际误差相符,因此可以用于寄生式时栅传感器的实际评定。

英文摘要：

In order to conduct systemic analyses of the error and uncertainty sources of parasitic time grating sensors,and to improve the measuring accuracy,a 84-level parasitic time grating was used as the research object to establish the uncertainty evaluation system which met the international GUM standard.The angle calculation formula was analyzed according to its measurement principles,and the uncertainty sources were divided into four categories which included errors of interpolation pulses,quantization errors of interpolation pulse signals,periodic errors of traveling wave signals and environmental errors.The theoretical transfer relationship among different uncertainty components were used to deduce the formula for the calculation of the synthetic measurement uncertainty according to the modern uncertainty theory.The experimental platform was built to measure the specific values of the uncertainty components by using the oscilloscope measurement result evaluation.And the synthetic measurement uncertainty of the parasitic time grating sensors was calculated by using the above specific value of the uncertainty components which was compared with the actual sensor measurement errors of the whole circumference.It may be seen that the uncertainty evaluation results by using the above built uncertainty evaluation method are consistent with the actual sensor errors.Therefore,it may be used in the practical evaluation of the parasitic time grating sensors.