加油机监控系统设计
上传时间： 2014-12-26
上传用户：金苑科技
基于软PLC和Web的现场总线远程监控
上传时间： 2013-11-15
上传用户：牛布牛
基于对相关电力企业安全工器具的调研，针对现有的对安全工器具的管理比较落后，从而导致难以对安全工器具进行有效监控的问题，提出了一种简单有效、容易实施的安全工器具监控方案。首先从整体上描述了安全工器具监控系统的总体结构，然后分别从硬件设计和软件设计两个方面对系统进行了详细阐述。该系统已经成功运用于某电力企业的安全工器具监控，运行稳定，达到了设计的预期目的。
上传时间： 2013-11-05
上传用户：blacklee
LED显示屏动态显示和远程监控的实现
上传时间： 2013-10-28
上传用户：kqc13037348641
介绍一种基于AVR单片机(Atmegal28)实现的直流电源监控系统的设计方案及其软、硬件设计思路。该监控系统能检测直流电源系统的各种实时运行数据及状态，自动监测各种故障并发出声光报警，实现蓄电池的智能管理；通过RS232或RS485与上位机通信，实现遥信、遥测、遥控和遥调等功能，能较好地满足无人值守变电站及配网自动化的需要。
上传时间： 2013-11-11
上传用户：gxf2016
针对船舶对中小型信息监控终端的需求，提出了一种基于AVR单片机的设计方案。以AVR单片机为核心，采用LCD控制器RA8835实现对液晶显示模块的控制，通过软硬件的紧密配合，实现信息图文并茂的实时显示，以及液晶对比度的调节。试验结果表明，该终端在高温高湿、低温高湿等恶劣环境条件下，显示清晰、工作稳定。
上传时间： 2013-11-16
上传用户：农药锋6
在航电系统维护过程中，为解决定位故障的效率和降低维修成本等问题，提出了基于ICD（Interface Control Document，接口控制文件）的1553B总线的信息监控系统模型。该系统运用数据采集卡对总线中传输的信号有无失真、偏差等电气特性进行检测，并使用1553B通讯卡通过测控软件LabWindows/CVI编程与ICD数据库的动态链接，实现总线信息的解析和故障的判断。与传统的维护过程相比，这种模型能够从信号的电气特性以及信息的解析等全方位的去检测判断故障的来源，并且能够广泛在其他1553B总线系统内扩展应用。验证表明该监控系统可以对总线信息进行快速有效地监测分析，能满足应用需求。 Abstract: In the process of avionics system maintenance， to solve the problems such as improving the efficiency of fast orientation to troubles and reducing maintenance cost， system of 1553B bus information monitor model based on ICD was proposed. The system observed whether the data which transmitted on the bus appear distortion and deviation by using data acquisition card. And using 1553B communication card programming of the measure software LabWindows/CVI and the dynamic linking of ICD database， message analysis and fault estimation could be realized. Compared with traditional maintenance， this model can all-dimensionally detect and analyze the source of faults from both electrical characteristics of the signal and message analysis， and it can be widely applied in the other 1553B system. Experiment shown that this monitor system can effectively detect and analyze the bus message and can meet the application requirements.
上传时间： 2013-11-23
上传用户：18752787361
为了有效地提升铅酸蓄电池的使用寿命，同时实现对充电过程的监控，设计出一种用单片机控制的36 V铅酸蓄电池充电电源。本电路采用反激式拓扑，连续电流工作模式，电源管理IC设计在电源的副边，由ELAN公司的EM78P258N单片机模拟，是用可编程器件模拟电源管理IC，实现智能电源低成本化的一次成功尝试，通过对单片机的软件设计实现了充电电源的状态显示、充电时间控制、报警、过温保护、过压保护、过流保护等功能。本充电器真正的实现了铅酸蓄电池的三段式充电过程，其最高输出功率可达90 W，效率约85%，成本不到20元，具有很高的市场竞争力。 Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile， a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal， charge time control， alarming， thermal protect， current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process， whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB， so that the charger is of powerful market competitiveness.
上传时间： 2013-11-16
上传用户：cepsypeng
实时时钟是微机保护装置的重要部件，在讨论PCF8583结构与功能的基础上，提出采用dsPIC33F系列微处理器与串行I2C时钟PCF8583的接口设计方案，给出了相应的接口电路与软件流程。该设计方案结构简单，可靠性高，开发周期短，具有一定的实用与参考价值。所设计的微机保护装置已投入现场运行，效果良好。 Abstract: Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock chip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
上传时间： 2013-11-18
上传用户：Thuan
数字信号处理器dsPIC33F集多通道高精度A/D转换、多通讯模式、看门狗、CMOS Flash技术等于一体，其内部可完成所有数据操作，实现总线不出芯片技术。将该处理器应用于微机保护装置，提出基于dsPIC33F微处理器的微机保护装置的设计方案，给出相应的接口电路与软件流程。该设计方案结构简单，性价比及可靠性高，开发周期短，具有一定的实用推广价值。所研制的微机保护装置现场运行效果良好。 Abstract: The dsPIC33F microprocessor has a plentiful interior resource which contains multi-channel，high precision A/D converters，multi-communication module，watchdog，CMOS Flash technology，and so on.All data manipulations is accomplished interiorly.What is more，it makes the technology that bus does not go beyond the chip comes into practice.The paper put forwards a design scheme based on dsPIC33F microprocessor.The scheme has the advantages of simple structure，high reliability and shortened exploitation cycle.What is more，it has definite practicality and reference.The microcomputer protection device has been put into operation with excellent effects.
上传时间： 2013-11-16
上传用户：开怀常笑
