The Shock Wave Test And Design Of Light-triggering

The shock wave test is an important technology method that researches and evaluates thewarhead’s the mutilate power. The design and application of protective cover, using for theweapon warhead’s design of damage performance, has important practical significance.Warhead explosion trial, with a high impact, high temperature, strong vibration, high ionizingfield, was also accompanied by smoke, sand and flying fragment picked up by shock wave atexplosion instant. The general instrument, on the condition of the explosion trials, was unableto complete this test’s task.On the basis of analyzing the present testing-technology about shock wave, this paperproposes a separate testing system for the shock wave combining with the photoelectricsynchronized device and storage testing technology. At the same time of acquiring shockwave overpressure curves, the shock wave’s time lag passing through each test nodes wasobtained by regarding the explosion optical signal as the system’s synchronous time base. Onthe premise of testing accurately the distance between the test nodes, the shock wave’saverage velocity in a node interval can be calculated by the time between nodes. Itimplemented the shock wave’s testing-function of velocity and pressure test at the same time.This testing system, based on theoretical analysis of the blast pressure and the explosionoptical signals, proposed the overall design of system and the technical indicators. In thispremise, it introduced separately the design thought and implementation method about opticaltrigger, sensor adapter circuit and digital module. Functionality and performance of all theparts of the system was verified. Calibration shock tube experiment and shooting range testwas accomplished after the system integrated, verifying the system’s function andeffectiveness.The main work in the thesis:（1）The shock wave’s signal analysis of explosive light and overpressure: On this basis, technical indicators of the measuring system is proposed.（2）Design principle and experimental validation of the light-triggering device. Itdesigned the special device for the front-end sampling of explosion light and used thelight-triggering device to synchronize distributed each test node.（3）The design and implementation of sensor adapter circuit. According to thecharacteristics of the ICP pressure sensor and system needs, it designed the special sensor’spower-supplying circuit and single power-supplying circuit for signal disposal.（4）The realization of the collection and storage module: It includes the function’simplementation of12bits A/D’s sequential control, SDRAM memory’s real-time storage andFlash memory’s data backup.（5）The design implementation of the embedded USB communication: Using bulk onlytransport in the mass storage device of USB protocol implemented the function of datacommunication between the equipment and the upper computer.