航天器氦质谱吸枪检漏法的不确定度评定

Uncertainty Evaluation on the Sniffing Probe Method of Helium Mass Spectrometer Leak Detector for Spacecraft

航天器的单点漏率测试往往采用氦质谱吸枪检漏法,因此,研究该方法的不确定度评定具有重要的工程实际意义。文中首次从不确定度的基础理论出发系统地研究了氦质谱吸枪检漏法的不确定度评定方法,并结合一个具体的案例给出了评价的详细步骤。该评价方法可以为航天器的总漏率测试法和真空检漏法的不确定度评定提供一定的参考依据。

Helium mass spectrometer sniffing probe method is widely used in the process of the single point leak testing on the spacecraft. So it is important to study the uncertainty evaluation of this method. First, the method of uncertainty evaluation was studied based on the basic theory about uncertainty. Secondly, the detail evaluation steps were also given through a example. The presented evaluation method may provide a reference for evaluating the uncertainty about the total leak rate method of spacecraft and vacuum leak testing method.