摘要
介绍了用最小二乘法评价外差式激光测振仪信号处理电路线性度指标时测量结果的不确定度分析和评定过程。讨论了影响线性度测量不确定度的几个主要误差来源,包括信号源误差、被校仪器响应误差、被校仪器线性度、标准仪器测量误差等等。给出了减小线性度测量不确定度的主要措施:①环境控制措施,以减少环境带来的不确定度;②选取高精度信号,以减少信号源误差带来的不确定度;③选取高精度标准测量仪器,以减少测量误差带来的不确定度。对一个实例,给出了激光测振仪信号处理电路线性度指标不确定度分析和评定结果。该过程及结论可应用在相应参数的计量校准中。
The uncertainty of evaluation results of linearity of the signal processing circuits of laser Doppler velocimeters （LDV） is described, which is by using the least mean square method. The analysis and evaluation of uncertainty are also presented. Some error sources of linearity evaluation are discussed, including the errors of signal source, the measurement errors, and the linearity of device under test, the influence of quantization error of linear system, the environment influence, and the others. Several main methods about decreasing the linearity evaluation errors and evaluation uncertainty have been proposed. They are environment influence controlling, decreasing the signal uncertainty to decrease the evaluation uncertainty by signal source. In an example of experiment, that the analysis and uncertainty evaluation results of linearity of LDV by using the method is presented. The courses and conclusion of analysis and uncertainty evaluation of linearity, can be applied to the uncertainty evaluation of measurement standards of linearity, can also be used in the uncertainty evaluation of linearity itself.
出处
《计量学报》
CSCD
北大核心
2008年第3期242-247,共6页
Acta Metrologica Sinica
关键词
计量学
激光测振仪
线性度
不确定度分析
最小二乘法
校准
Metrology
Laser Doppler velocimeter
Linearity
Uncertainty analysis
Least mean square
Calibration
作者简介
梁志国（1962-），男，黑龙江巴彦人，长城计量测试技术研究所研究员，北京航空航天大学博士研究生。主要研究方向为：数字化测量与校准、模式识别、动态校准和精确测量。Lzg304@sina．com
