Research On The Photoelectric Testing Technology For Concentration Of Muzzle’s Smoke-box

As the rapid development of research on weapons scientific and upgrading-cycle of military equipment is shorten, the performance of weapon-testing work put forward higher requirements. Artillery is one of the important weapon in the modern battlefield, which has brought to the attention of the countries all over the world, our country also regarded the development of artillery weapons as one of the important directions. Although the development of artillery technology advances, but there is still a lot of problems caused by the researchers’ attention, such as artillery firing smoke and flame injection, and other problems. Firstly artillery generates a lot of smoke when emitting, it is easy to expose the location of the launch personnel, and endangers their personal safety, it also affects the accuracy of targeting when launch again. Secondly smoke of exports is too much, so combustion of propellant is incomplete that energy utilization ratio is low, and causes huge waste of energy. Accordingly, testing of artillery smoke concentration is very necessary.This thesis was designed a new photoelectric testing methods by accessing to relevant principles and smoke-testing, and combining Lambert-Beer law. After the smoke-box collected the smoke and used a semiconductor laser as a light source through the application of smoke-box, and used APD as a photoelectric detector to test circuit for signal amplification process by phase-locked amplifier. And finally through data processing and system calibration to achieve the voltage and light intensity, light intensity and concentration were converted by one correspondence, to achieve muzzle smoke concentration test. To demonstrate the feasibility of this testing technique, used Simulink to model and analysis this testing technique that got a good test results, and as a basis, conducted a circuit design, including laser modulation circuit, APD power supply circuit, preamplifier and filter circuit and subsequent lock-in amplifier circuit and filter circuit.At last involved interference circuit effectively suppress noise and good extracted drowned in the noise of the smoke concentration test signal by simulation software and simulation experiments, and error was kept within 5%. Used Abaqus to analysis and check the smoke-box thickness of Pressure at 20MPa and determined the design thickness of 20mm. This test technology will effectively solve the smoke concentration testing interference, for the development of a new type of muzzle smoke test system will be provided technical reference. Finally, used Solidworks to design structural.