提出了一种基于粒子激光散射的多传感器阵列的烟雾识别系统,描述了用蒙特卡罗模拟烟雾粒子散射特性 的一般方法,模拟并验证了在不同粒径、折射率和入射角情况下烟雾粒子散射光强的角分布情况,模拟结果和理论 分析吻合得很好。关键词　烟雾识别,蒙特卡罗模拟,光子传输,激光散射Abstract 　Based on the particle laser scattering , the paper puts forward a smoke recognition system with multi2sensor array. And then a Monte Carlo method is described to simulate the scattering characters of smoke particles. By changing the sizes , refractive index of the smoke particles and incident angles of light source , the simulation results fit well with the classical results derived from Mie scattering theory.Key words 　smoke recognition , Monte Carlo simulation , photon transmission , light scattering