摘要
楼体的封闭性和装修材料的屏蔽性,使得火灾信号在各种物质中的衰减程度不同。传统的嵌入式火灾信号传递中,无法对不定封闭性衰减做出判断,从而造成远距离火灾信号传输发生较大衰减,无法实现远程报警。本文提出一种时频旋转线性变化算法。该算法首先利用谱减法,消除楼宇中的复杂外界环境因素造成的火灾信号干扰噪声,从而提高火灾信号的质量。然后,利用时频旋转线性变换算法,对楼宇中的火灾信号进行增强处理,从而抵抗遮挡衰减,最终完成楼宇中火灾信号的远程传输。实验结果表明,改进的算法进行嵌入式楼宇中火灾信号远程传递,可以极大的提高火灾信号传输的距离,增加信号强度。
This paper presented an algorithm for linear variation of the time-frequency rotation. The algorithm u- ses spectral subtraction to eliminate the fire signal interference noises caused by complex environmental factors of buildings, thereby improving the quality of the fire signal. Then, using the time-frequency rotating linear transforma- tion algorithm, the fire signal of building is enhanced to resist block attenuation. Finally, the fire signal remote trans- mission in buildings is completed. The experimental results show that the improved algorithm embedded in the build- ing fire alarm remote delivery, can greatly improve the fire signal transmission distance, and augment the signal strength.
出处
《计算机仿真》
CSCD
北大核心
2013年第11期198-201,共4页
Computer Simulation
关键词
楼宇
火灾信号
远程传递
信号衰减
Building
Fire signal
Remote transmission
Signal attenuation
