利用Atmel公司的ATmega168微处理器，采用A/D转换方式来实现按摩椅控制器的键盘接口，通过在硬件电路中巧妙地选择电阻，在软件设计中采用数字滤波、二分法和区间鉴定等方法，灵敏可靠地实现了按摩椅中30个按键的处理。给出了硬件电路设计和软件设计思想以及部分汇编代码。 Abstract: This paper chooses A/D conversion method to realize the keyboard interface of the controller by using ATmega168 microchip from Atmel Company.It accomplishes 30-key dealing sensitively and reliably in massage chair through skillfully selecting resistors in hardware circuit and using digital filter,dichotomy and area-judging method in software design.The hardware design circuit, software design idea and partly assembles code are presented mainly.
上传时间： 2014-01-10
上传用户：咔乐坞
介绍以P87LPC764型单片机为核心的延时型漏电继电器设计方案。该方案可供用户选择实现额定动作电流和5倍额定动作电流下不同的延时动作时间，并有重合闸设定选择功能。解决了以往传统分立元件带来的延时时间离散性大且不易实现的弊端。 Abstract: In this paper, the delay leakage relay based on P87LPC764 is introduced in detail. This system provides different relay times at rating current and 5× rating current for users and also offers superposition brake set selection function. So that it resolves many traditional problems.
上传时间： 2013-11-08
上传用户：zhaiye
以S3C825A为例介绍三星公司SAM8系列单片机的内部结构及其软件开发环境，详细描述采用混合编程法来对SAM8系列单片机进行软件设计的一般方法，最后给出用混合编程法对S3C825A进行软件设计的具体应用实例。 Abstract: With S3C825A,this paper firstly introduces the SAM8 series single-chip microcontrollers and their software development environment, then introduces mixed programming technology for SAM8 series single-chip microcontrollers. In the end, the application program is also given.
上传时间： 2013-12-09
上传用户：ZZJ886
基于幅移键控技术ASK（Amplitude-Shift Keying），以C8051F340单片机作为监测终端控制器，C8051F330D单片机作为探测节点控制器，采用半双工的通信方式，通过监控终端和探测节点的无线收发电路，实现数据的双向无线传输。收发电路采用直径为0.8 mm的漆包线自行绕制成圆形空心线圈天线，天线直径为（3.4±0.3）cm。试验表明，探测节点与监测终端的通信距离为24 cm，通过桥接方式，节点收发功率为102 mW时，节点间的通信距离可达20 cm。与传统无线收发模块相比，该无线收发电路在受体积、功耗、成本限制的场合有广阔的应用前景。 Abstract: Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller， using half-duplex communication mode， this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter （3.4±0.3） cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm，the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules， the circuit has wide application prospect in small size， low cost and low power consumption and other characteristics.
上传时间： 2013-10-19
上传用户：xz85592677
为解决传统可视倒车雷达视频字符叠加器结构复杂，可靠性差，成本高昂等问题，在可视倒车雷达设计中采用视频字符发生器芯片MAX7456。该芯片集成了所有用于产生用户定义OSD，并将其插入视频信号中所需的全部功能，仅需少量的外围阻容元件即可正常工作。给出了以MAX7456为核心的可视倒车雷达的软、硬件实现方案及设计实例。该方案具有电路结构简单、价格低廉、符合人体视觉习惯的特点。经实际装车测试，按该方案设计的可视倒车雷达视场清晰、提示字符醒目、工作可靠，可有效降低驾驶员倒车时的工作强度、减少倒车事故的发生。 Abstract: A new video and text generation chip，MAX7456，was used in the design of video parking sensor in order to simplify system structure，improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit structure，lower cost，and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance，which makes the driver easy to see backward and reduces chance of accidents.
上传时间： 2013-12-10
上传用户：qiaoyue
介绍了一种基于MSP430系列单片机和ADXL203加速度传感器的数字式倾角仪，它不仅可以实现水平度检测，而且可以测量00～3600范围内的任意倾角，分辨率可达O．1。。此外，由于该倾角仪输出为数字结果，因此它也可以与其他的数字设备结合起来，组合成一个功能更加强大的仪器。该数字倾角仪可广泛应用于建筑、机械、道路、桥梁、石油、煤矿和地质勘探等各种需要测量重力参考系下倾角的场合。关键词：MSP430F133单片机；力敏传感器；ADXL203加速度计；角度测量 Abstract：This paper presents a new style digital inclinometer which is developed on the basis of the MSP430F133 MCU and the ADXL203 dual axis aeeelerometer．This inclinometer not only can test levelness，but also can measure any angle between 0。and 360。with an accuracy of 0．1 O．In addition，its output is a digital result，which makes it possible to integrate itself with other digital devices to form a more functional unit．This inclinometer can be widely used in any construction site，oil field，coal-mine or geologic survey and SO on where it will provide the working people with convenience to measure any angles．Key words：MSP430F133 MCU；force sensor；ADXL203 accelerometer；angle measurement
上传时间： 2013-11-14
上传用户：lizhizheng88
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
将AVR上的队列串口驱动程序修改后，运行在STM32开发板，采用中断方式接收和中断发送，并加入了缓冲收发队列操作。由于该驱动是用来操作西门子的TC35或MC55等通信模块，所以加入了“等待串口接收完成”函数，该函数需要一个10ms的定时进行计数累加。
上传时间： 2013-11-11
上传用户：kaixinxin196
PROTEUS VSM在单片机系统仿真中的应用:：介绍了单片机系统仿真工具PROTEUS VSM 及其在单片机系统仿真中的应用，给出了具体的应用实例，详细地介绍了PROTEUS VSM 与Keil uVision3的接口方法。关键词：单片机；Keil uVision3；仿真；外围器件；PROTEUS VSM； Abstract：This paper introduces the simulation tool for M CU system —PROTEUS VSM ， and presents the application ofPROTEUS VSM in MCU system simulation through an applicable example．The way of interfacing PROTEUS VSM to Keil uVision3is also presented in details．Keywords：MCU ；Keil uVision3；simulation；peripheral devices；PROTEUS VSM ；
上传时间： 2013-11-16
上传用户：chenxichenyue
本文介绍了一种基于单片机的健身车转速测量系统。该系统具有电路简单、使用方便等特点。文中详细介绍了该系统的工作原理,并且给出了它的硬件原理图和软件设计程序框图。关键词:转速 单片机 测量ABSTRACT :This paper introduces a measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in detail in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
上传时间： 2013-11-02
上传用户：源弋弋
