基于AVR单片机的智能家居控制系统设计

设计了一个基于AVR单片机的智能家居控制系统,系统采用了控制器、监控器及被控终端的框架结构.控制器和监控器之间采用蓝牙串口通信模块进行通信,控制器和被控终端之间采用无线射频通信.     

A fuzzy logic system based on Schweizer-Sklar t-norm

In recent years, the basic research of fuzzy logic and fuzzy reasoning is growing ac- tively day by day, such as the basic logic system BL proposed by Hajek[1]; fuzzy logic system MTL proposed by Esteva and Godo[2]; fuzzy reasoning, implication operators …     

基于UL列式的带刚臂平面杆元非线性分析

为了解决平面杆元在相交处可能存在的刚性连接问题,根据带刚臂平面杆元在受力后的运动和变形特点,基于UL法,推导出两端带任意刚臂的平面杆元的切线刚度矩阵．利用该研究成果编制了程序,对无刚臂和有刚臂的平面杆结构进行几何非线性分析．计算结果证明了这种非线性单元列式的正确性和非线性求解过程的收敛性．     

408UL文档输出设备电源工作原理

408UL遥测地震仪记录系统稳定可靠，应用广泛。然而，该系统没有附带电路原理图，损坏后维修难度较大。我们在维修408UL文档输出设备电源的过程中，根据实物绘制出该电源的电路原理图。本文阐述该设备电源电路的工作原理。     

408UL无线中继站LRU在复杂排列中的应用

408UL无线中继站LRU采用某一频率的无线电信号进行数据传输,其特点为跨度范围大,传输过程中不受干扰。因此,在施工中通过架设无线中继站,解决了测线穿越河流等障碍物的问题。本文介绍了中继站LRU的工作原理,LRU在排列中的参数设置、使用方法以及使用中的注意事项。     

408 UL蛇形排列设计在生产中的应用

利用408UL仪器的优越功能，可解决在地表复杂地区地震勘探生产中遇到的一些特殊问题。文章通过具体实例，介绍了利用408UL仪器的蛇行排列在实际应用中的经验和体会。     

Modelling the vertical UL 94 test: competition and collaboration between melt dripping,gasification and combustion

An experimental and numerical investigation of the effect of bisphenol A bis(diphenyl phosphate) (BDP) and polytetrafluoroethylene (PTFE) on the fire behaviour of bisphenol A polycarbonate/acrylonitrile butadiene styrene (PC/ABS) in the vertical UL 94 scenario is presented. Four PC/ABS blends were discussed, which satisfy different UL 94 classifications due to the competing effects of gasification, charring, flame inhibition and melt flow/dripping. For numerical investigation, the particle finite element method (PFEM) is used. Its capability to model the complex fire behaviour of polymers in the UL 94 is analysed. The materials' properties are characterised, in particular the additives impact on the dripping behaviour during thermal exposure. BDP is an efficient plasticiser; adding PTFE prevents dripping by causing a flow limit. PFEM simulations reproduce the dripping and burning behaviour, in particular the competition between gasification and dripping. The thermal impact of both the burner and the flame is approximated taking into account flame inhibition, charring and effective heat of combustion. PFEM is a promising numerical tool for the investigation of the fire behaviour of polymers, particularly when large deformations are involved. Not only the principal phenomena but also the different UL 94 classifications and the extinction times are well predicted. Copyright © 2014 John Wiley & Sons, Ltd.     

基于PID控制理论的暖气流量控制系统的设计

在我国北方,冬季取暖一般采用暖气技术集中供暖,用户不能自主地调节温度,室内温度过高,资源浪费的现象严重.本设计应用PID控制技术,以步进电动机作为执行元件,根据实时测量的室内温度,来控制暖气片上阀门的开度,调节暖气片内热水或热气的流量,从而达到了控制室内温度的目的,增强了居民室内生活的舒适度,减少了能源的浪费.     

基于STC12C2052单片机的软件解码器设计

在遥控领域中,PT2262／2272是最常用的编解码芯片之一,但这两种芯片在应用中必须对地址进行统一编码,配对使用,这在很大程度上影响了其应用的灵活性。文章通过对PT2262波形特征的分析,对采用STC12C2052单片机进行软件解码及学码的方案,给出了具体的软、硬件设计。