Transmission Echo Analysis And Research Of Laser Interference Environment Under Dust

Pulsed laser detection system in many fields have a very wide range of applications, influence each other in some specific circumstances, however, produce dust floating in the air between the particles and the laser beam, especially soot particles have absorption and scattering of the laser beam generating led laser transceiver system performance degradation or even failure, resulting in serious miscarriage of justice. Aiming at this case, the first laser echo characteristics smoke in-depth discussion and research, followed by analysis of their results, targeted laser anti-dust interference circuit design.Firstly, the light scattering processing done in-depth discussion focuses on the Rayleigh and Mie scattering theory, laser scattering mechan isms under different dust particle size, and the use of Monte Carlo method of single and multiple scattering theory of derivation. Secondly, the design of short-range detection laser transceiver system for the analysis and calculation of its parameters and indicators for each module, and set up a quantitative analysis chamber soot particles, and the formation of soot interference waveform features in-depth studies, the establishment of the laser transmission model in the dust environment. At the same time, the establishment of the target object model, simulation via Matlab software for its echo, both of comparison, the results of anti-dust interference theory.In the signal processing module, laser interference from the perspective of the characteristics summarized for the front, are proposed pulse width measurement and time gated complex recognition technology, the threshold voltage of adaptive technology, capture time waveform law center design, and by means of ISE for signal processing of each functional module programmed by Ism, write stimulus file, to test the feasibility of making the function of each module has been well verified. Signal confirmation module, since the pseudo-random sequence excellent anti-jamming performance, through the use of delay-related methods, its peak detection, reached the subject of the desired effect.