Research on Technology of Shock Tube Active Film Breaking

Pressure sensors are widely used in various fields of social economy and production and life. The calibration and testing of dynamic pressure performance are usually carried out by using the step pressure generated by shock tube. Natural and active film breaking are the main ways to generate shock step pressure by shock tube. Compared with the natural film breaking technology, the active film breaking technology can control the dynamic parameters of the step pressure, shock wave velocity and response characteristics through the control of the film pressure ratio, and further improve the reliability of the dynamic calibration performance of the shock tube. This paper only introduces the principle and performance of different structures of the active film breaking device, and through different structures and blocking ratio of the film breaking device test, study and analysis of the impact of active film breaking technology on the shock wave waveform, for different calibration requirements for the dynamic pressure performance of the pressure sensor, so as to select the appropriate active film breaking technology to provide a reference.