基于JB35GSM模块的水位检测报警系统

本文介绍JB35GSM模块利用短信报警功能实现对水位的检测和监控,同时当操作者接收到水位的报警短信时,可以向GSM模块发送短信息要求进行AT89C2051单片机控制电机带动水泵抽水.针对改造后的该系统可以应用于智能家居及农业生产中.     

运用单片机及GSM模块的远程温度采集系统设计

远程温度采集系统主要由STC89C51单片机、GSM无线通信模块TC35i和DS18B20温度传感器等组成。通过单片机上的温度传感器采集周围的温度,然后实现单片机与GSM模块的通信,手机发送短信给GSM模块的SIM卡,GSM模块接收信息后收集单片机上当时的温度,并把该温度发给手机。当温度超过限定值时,单片机则自动控制GSM模块向手机发送温度,实现报警。     

基于GSM的嵌入式短信报警系统的设计与实现

应用GSM网络,实现了嵌入式短信报警系统。系统以AT91M55800芯片为控制核心,以手机短信为载体,通过红外传感器感应可疑信号,将其传输给控制系统,再通过modem与GSM模块发送手机短信,完成报警功能。     

基于ARM的传感器校验仪GSM数据传输的研究

本文讨论了基于ARM传感器校验仪校验结果,通过GSM模块以短信形式传输的研究方案,依托现有移动通信GSM网络的SMS服务作为数据传输的通道,实现校验数据以短信形式发送上级部门,从而为安全提供了保障。     

基于GSM短信技术的10 kV线路开关状态信号采集装置设计

针对10 kV线路开关实际运行需要,设计了一种基于GSM短信技术的远程监测与报警装置,该装置以MSP430F2618单片机为主控制模块,能可靠地实现短信的收发及短信的存储。介绍了硬件设计和短信常用的AT指令,详细阐述了装置短信功能实现,包括管理员功能和操作员功能及短信密码分级;给出了操作员的查询和侦听功能的CPU与GSM模块间程序执行流程,试验验证了该装置运行稳定可靠。     

输电线路防外破预警系统浅析

输电线路的保护是安全输电可靠供电的重要措施,本输电线路防外破预警系统采用现场使用X86架构的核心板作为主控,设计了视频图像处理程序、控制器控制GSM模块发送短信到手机端和发送图片到云端数据库、利用C#设计窗体程序实现云端数据库的登陆和访问,通过现场图像处理发现外物入侵。同时通过GSM模块将报警信息发送到云端数据库,用户通过Android客户端或者电脑端查看报警图片。     

GSM技术在远程监测系统中的应用

介绍了一种基于GSM短消息的远程水位监测系统远程监测分站的设计.系统硬件是由2部分构成,一部分是远程监测分站主板,主要由CPU及外围部分、ICL7135 A/D转换芯片及外围电路、LCD部分和外国电路构成;主要完成模拟量或数字量的监测,并及时在LCD上显示出监测状态;另一部分是GSM模块TC35I,主要通过AT指令控制GSM模块完成监测数据以短消息的形式向监测中心定时发送,对监测中心机控制命令的接收,以及在紧急情况下的短信报警功能.     

嵌入式车载定位系统研究

采用嵌入式微处理器LPC2129作为的定位器的控制器单元,结合GPS定位模块LR9548S和GSM模块设计了车载定位系统.定位器通过GPS模块获取实时的位置信息,包括经纬度、行驶速度、方向和时间日期等,还可以根据用户的需要设定超限报警范围,车辆驶出设定区域会立即发送短信至预先设定好的手机号码报警;用户端可以随时向定位器发送短信获取当前车辆的位置信息.一旦发生车辆被盗案件,用户通过短消息查询方式对被盗车辆位置信息随时掌握,能为案件的侦破提供重要的线索.     

基于SMS远程控制的汽车防盗系统

介绍基于SMS、利用GSM无线网络和汽车AMT技术的汽车防盗系统。车主可通过手机以SMS方式获得汽车行驶参数。当汽车受到侵害时,车主可以用手机通过无线通信模块发送短信命令,直接对汽车进行远程控制,从而保障汽车安全。     

家用移动保安机器人关键技术研究与实现

家用移动保安机器人,具有自主移动、有害气体检测、老人跌倒信号处理、远程报警等功能。利用多传感器技术监测老人身体及所处环境情况,采用单片机作为控制器,驱动机器人双轮旋转,同时接收传感器的异常信号,将其处理后,发送数据到GSM短信模块,驱动其发送短信到软件中已设定的号码,实现远程报警。本文的研究成果为将来家居保安移动机器人更高层次的理论与方法研究提供了一个可靠的实验平台及基础,具有一定的实用价值。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...