摘要
对于虚拟仪器测量不确定度进行评估,评估的基本思路就是运用概率事件中的仿真技术。这一技术能够产生出服从某一特定概率分布的随机数值,对虚拟仪器测量链里的随机误差源作出合理的模仿,将模拟随机误差和采样数据,一起输入到虚拟仪器信号中的处理模块内,取得一系列的伪测量结果。接下来,就是利用统计学中标准方差对伪测量结果加以表示,所表示出来的则是虚拟仪器测量结果的不确定度。同时,利用虚拟仪器的设计平台所提供的扩展机制,对数据采集卡中随机采样的误差仿真模块进行构建。运用误差仿真模块来对信号的测量不确定度进行评估,把评估的结果和理论值进行详细的对比,取得了比较好的一致性。
For virtual instrument to evaluate the uncertainty of measurement,the basic idea is to use simulation technology to evaluate the probability of events in.This technique is able to generate random values of a particular probability distribution,make a reasonable imitation of random error source of virtual instrument measurement chain,will simulate the random error and sampling data,together with the input to the virtual instrument signal processing module in the pseudo measurement results,obtained a series of.Next,is to use the standard variance in statistics of pseudo measurement results to show,the show is the uncertainty of the measurement result of virtual instrument.At the same time,extension mechanism design platform based on virtual instrument provided by the error of the simulation module,randomly sampled data acquisition card for construction.Using the error simulation module to signal measurement uncertainty evaluation,the evaluation result and theoretical value for detailed comparison, achieved good correspondence.
出处
《电子测试》
2014年第8期50-51,54,共3页
Electronic Test
关键词
蒙特卡罗方法
虚拟仪器
数据采集
测量不确定度
Monte Carlo method
virtual instrument
data acquisition
measurement uncertainty
