研制了一种新型的激光烟雾浓度检测系统，可实现烟雾浓度的实时定量检测。通过侧向散射式光学设计和以数字信号处理器为核心的信号处理电路设计，得到了激光通过烟雾后透射光强和散射光强之间的线性关系。根据此线性关系将散射光强转换为透射光强，进而计算烟雾浓度，降低了运算复杂度，同时解决了低浓度烟雾的检测问题。最后将本系统与现有产品相比较，结果表明，该检测系统结构简单、稳定性和实时性好，具有良好的经济效益。

A novel smoke detection system using laser is developed to measure the smoke concentration in real-time and quantitatively. A linear relation between transmitted light and scattering light of laser through the smoke is established based on the design of lateral scattering optical structure and the circuit of digital signal processor as a core. According to this linear relationship, the transmitted light is converted to the scattering light, and then the concentration of smoke is calculated. In this way, the computational complexity is reduced, and the problem of measuring low concentration smoke is solved. Finally, compared with existing product, the result shows that this proposed system is simple in structure, stable ,real-time and has good economic benefits.