针对目前采用的热敏电阻测量方法，提出了采用单总线数字式温度传感器DS18B20和单片机组成的新型温度测量仪。介绍DS18B20的结构和工作原理，以及单总线工作原理，给出了由Mega8单片机和DS18B20构成的单总线温度测量仪的硬件电路及软件流程图。经试验基于单总线器件DS18B20的温度测量仪，具有测量准确、测温范围宽、体积小、控制方便等优点。 Abstract: This paper brings forward a new temperature meter composed of 1-Wire temperature sensor DS18B20 and MCU which has advantage of the thermistor. In the article, the DS18B20＇s structure and cOntrolling principles are introduced and hardware circuit and software diagram of the temperature meter are given.After been tested,the temperature meter has the advantages of accurate measurement, wide temperature range, small volume and convenient cOntrolling.
上传时间： 2013-10-31
上传用户：hzy5825468
介绍一种基于单片机的多路温度采集及监控系统，能够测量6路温度信号，具有计算机联网功能，各测量点可以单独监控和设置，可根据用户的需求自动控制。测量温度范围为-10 ℃～200 ℃，控制方式采用模拟量调压模式。该系统具有控制精度高、冲击小等特点。 Abstract: A temperature collecting and surveillance-cOntrolling system based on sing-chip microcomputer is introduced. It can measure 6 channel signal of the temperature,and it has a function of network connection.The temperature measure points can be monitored and located, it can be controlled automatic according to user’s demand.The temperature range is -10℃ to 200℃.The model of control is adjustable voltage with simulation. It features high precision and little impact.
上传时间： 2013-10-23
上传用户：bjgaofei
介绍了用单片机C 语言实现无功补偿中电容组循环投切的基本原理和算法，并举例说明。关键词：循环投切;C51;无功补偿中图分类号： TM76 文献标识码： BAbstract: This paper introduces the aplication of C51 in the cOntrolling of capacitorsuits cycle powered to be on and off in reactive compensation.it illustrate thefondamental principle and algorithm with example.Key words: cycle powered to be on and off; C51; reactive compensation 为提高功率因数，往往采用补偿电容的方法来实现。而电容器的容量是由实时功率因数与标准值进行比较来决定的，实时功率因数小于标准值时，需投入电容组，实时功率因数大于标准值时，则需切除电容组。投切方式的不合理，会对电容器造成损坏，现有的控制器多采用“顺序投切”方式，在这种投切方式下排序在前的电容器组，先投后切；而后面的却后投先切。这不仅使处于前面的电容组经常处于运行状态，积累热量不易散失，影响其使用寿命，而且使后面的投切开关经常动作，同样减少寿命。合理的投切方式应为“循环投切”。这种投切方式使先投入的运行的电容组先退出，后投的后切除，从而使各组电容及投切开关使用机率均等，降低了电容组的平均运行温度，减少了投切开关的动作次数，延长了其使用寿命。
上传时间： 2014-12-27
上传用户：hopy
基于AT89C52单片机的步进电机控制系统设计 摘 要: 提出了一个由AT89C52单片机控制步进电机的实例。可以通过键盘输入相关数据, 并根据需要, 实时对步进电机工作方式进行设置, 具有实时性和交互性的特点。该系统可应用于步进电机控制的大多数场合。实践表明, 系统性能优于传统的步进电机控制器。 关键词: 单片机; 步进电动机; 直流固态继电器; 实时控制 ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor cOntrolling. The p ractice showed that the performance of this system outdid the tradi-tional stepp ing motor controller.
上传时间： 2013-11-22
上传用户：vodssv
提出了一个由AT89C52单片机控制步进电机的实例。可以通过键盘输入相关数据, 并根据需要, 实时对步进电机工作方式进行设置, 具有实时性和交互性的特点。该系统可应用于步进电机控制的大多数场合。实践表明, 系统性能优于传统的步进电机控制器。关键词: 单片机; 步进电动机; 直流固态继电器; 实时控制Con trol System of Stepp ingMotor Ba sed on AT89C52 ChipM icrocomputerMENGWu2sheng, L ILiang (College of Automatization, Northwestern Polytechnical Unversity, Xipan 710072, China)ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor cOntrolling. The p ractice showed that the performance of this system outdid the tradi tional stepp ing motor controller.KEY WORDS: Chip microcomputer; Stepp ingmotor; DCSSR; Real2time control
标签： Control System ingMot Stepp
上传时间： 2013-11-19
上传用户：leesuper
针对飞行模拟器座舱数据采集的复杂性，设计了一种基于以太网分布式的数据采集控制系统，该系统是RCM5700微处理器模块上的以太网应用。在系统的基础上具体讨论了PoE技术的应用，在传输数据的网线上同时提供电流，提出并实现了一种包括辅助电源在内的完整可靠的PoE供电方案。设计采用美国国家半导体的LM5073和LM5576并根据不同的负载情况，进行稳定可靠的电压转换，以满足数据采集电路的要求。实验结果表明：该设计稳定可靠，满足低于13 W的采集节点供电要求，提高了模拟器信号采集系统的通用性和标准化程度，避免了以往数据采集节点单独繁琐的电源设计。 Abstract: Aiming at the complexity of large avion simulation and cOntrolling，the simulator cabin distribute data collecting and control system was designed. This system is the application of RCM5700 on Ethernet. Based on this system，PoE technique that makes Ethernet can also provide power were expounded with emphasis and included FAUX design the PoE resolution was realized. To achieve the requirement of this system，LM5073 and LM5576 were used to DC-DC switch. From the data of experiment，the design filled the requirement of power-need of node whose power was lower than 13W. The application of the technique can advance the degree of simulation data collections currency and standardization and avoid designing additional power system.
上传时间： 2013-11-09
上传用户：xyipie
Contents 1 Introduction 1 2 Glosary 1 2.1 Concepts 1 2.2 Abbreviations and acronyms 4 3 Capabilities 6 4 Technical Description 6 4.1 General 6 4.2 Service oriented Allocation of Resources on the Abis interface (SARA) 8 4.3 Configuration of dedicated PDCHs in Packet Switched Domain (PSD) 10 4.4 Handling of Packet Data traffic 15 4.5 Channel selection in Cicuit Switched Domain (CSD) 19 4.6 Return of PDCHs to Cicuit Switched Domain (CSD) 22 4.7 Main changes in Ericsson GSM system R10/BSS R10 24 5 Engineering guidelines 24 6 Parameters 26 6.1 Main cOntrolling parameters 26 6.2 Parameters for special adjustments 26 6.3 Value ranges and default values 28 7 References 29
上传时间： 2013-11-12
上传用户：ainimao
This book introduces embedded systems to C and C++ programmers. Topics include testing memory devices, writing and erasing Flash memory, verifying nonvolatile memory contents, cOntrolling on-chip peripherals, device driver design and implementation, optimizing embedded code for size and speed, and making the most of C++ without a performance penalty. Pages : 336 Slots : 1
标签： programmers introduces embedded include
上传时间： 2013-12-10
上传用户：shizhanincc
This book introduces embedded systems to C and C++ programmers. Topics include testing memory devices, writing and erasing Flash memory, verifying nonvolatile memory contents, cOntrolling on-chip peripherals, device driver design and implementation, optimizing embedded code for size and speed, and making the most of C++ without a performance penalty.
标签： programmers introduces embedded include
上传时间： 2015-06-22
上传用户：VRMMO
蓝牙协议This specification describes the Audio/Video Control Transport Protocol (AVCTP), which is used to transport command and response messages for cOntrolling Audio Video features in conformant devices. This protocol enables a device to support more than one control profile at the same time each supported profile shall define its own message formatting and/or usage rules.
标签： specification describes Transport Protocol
上传时间： 2015-08-11
上传用户：大融融rr
