Dynamic calibration of pressure sensors by small-scale explosive experiments in an explosion containment vessel

Air blast experiments of small-scale charges were conducted in an explosion containment vessel.The shock wave velocity was measured by sensor series.And the approximately theoretic peak pressure was determined from the shock wave velocity by using the Rankine-Hugoniot relationship. The sensor was then calibrated, and the relative error of the sensitivity was small.The shock wave parameters were measured and post processed by using the modified-Friedlander equation.The results show that the nonlinear regression by fixing the overpressure is close to the physical fact, and the fitting by fixing the duration has a high precision.Error analysis reveals that the sensor properties and the post-processing methods can produce errors.Experimental results display that the shock wave parameter measuring and post-processing method suggested has a high precision.By this suggested method, the sensor calibration and parameter measurement can be conducted simultaneously.