Effect of free-field transducers various mounts on shock wave measurement results
Du Hong-mian1 ; Zu Jing2; Ma Tie-hua1;Ma You-chun1
1.National Key laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;2. Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China
Abstract：Pencil probe, Blunt cylinder mount, and skimmer plate are transducer mounts commonly used for free-field overpressure measurement. Three mounts were calibrated with shock tube. The system function of different mounts and their response of shock wave were established and simulated by MATLAB. The result of calibration and simulation has been validated in large warhead explosion tests .The conclusion is got: the calibration method for free-field transducers with shock tube is feasible; the overpressure overshoot of blunt cylinder mount is the largest and its curve is some distorted; the overpressure overshoot of skimmer plate is smallest. The explosive blast measurement was done in which the sensors were higher than detonator. when the angle between transducer surface and shock wave propagation direction is negative, The overpressure peak of Blunt cylinder mount becomes the smallest than side on, but bigger than fact; the overpressure peak of Blunt cylinder mount is the biggest than side-on; skimmer plate causes significant error. The advice was given to choose mounts in overpressure measurement.
2011, Vol. 30 
