抗干扰设计在木材应力分等系统中的应用  

Application of anti-interference design to lumber stress rating system

作　　者：刘妍[1] 张厚江[1] 黄妍[1] 

机构地区：[1]北京林业大学工学院

出　　处：《北京林业大学学报》2011年第2期105-109,共5页Journal of Beijing Forestry University

基　　金："948"国家林业局引进项目(2008-4-69)

摘　　要：针对作者自行研发的一款木材应力分等系统进行抗干扰设计,抑制电网电源、传输通道、电磁辐射等不同干扰因素对木材应力分等系统的影响。结果表明:每增加一项抗干扰措施,都会得到更好的抗干扰效果;线性电源比开关电源抗干扰效果好;采用线性电源、前端加置低通滤波器和隔离变压器、有效接地的方案,得到的抗干扰效果最好。Focused on a lumber stress rating system developed by the authors,a set of anti-interference designs to restrain the effects of different disturbance factors on the system were conducted.These interferences include electric power,transmission channels,electromagnetic radiation,etc.Results showed that the system could display better effects once a new anti-interference method is applied and linear power had better anti-interference effect than switching power.The method of using linear power and adding low-pass filter and isolation transformer with effective grounding measure had the best antiinterference effect.

关 键 词：抗干扰设计 应力分等 线性电源 开关电源 

分 类 号：S781.1[农业科学—木材科学与技术]