LEAK TEST METHOD ANALYSIS OF SPACECRAFT

The article introduces normal fine leak test method used fabrication process of spaceflight production.Basing on different detection principles,spaceflight production leak test method of can be divided into three methods: helium mass spectrometer,pressure change and original media leak test method.Basing on different measurement system,above three leak test method can be divided into several small kinds.Measurement principles and application instances of every kinds of leak test method can be analyzed in detail.Finally,development directions and study emphases of spaceflight production leak test method in the future are introduced.