The explosion pipes are 80 mm 80 mm square tubes welded
by 16 Mn steel plates whose thickness is 12 mm. The total length
of pipes is 8 m, their withstand pressure are more than 20 MPa,
and the terminal is closed. Pipes have some holes used for installation
of pressure sensor and ignition device, and have several valves
used for pumping vacuum, air inlet and connecting vacuum meter
and so on.
The output signals of pressure sensors are voltage signals whose
units are mV, so the overpressure values whose units are MPa cannot
be obtained directly. Through the calibration of various pressure
sensors by using piston gauge, the corresponding relations
between voltage signals and overpressure values of pressure sensors
can be found, and the overpressure values whose units are
MPa can be outputted directly by inputting related parameters into
the acquisition system.