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  • 基于P87C591的信号采集节点的设计

    介绍了CAN总线和P87C591单片机的特点,给出了基于P87C591单片机的信号采集节点的软、硬件设计,指出了硬件电路设计中应注意的问题,在软件设计中重点介绍了节点初始化、报文发送和报文接收等子程序。 Abstract:  The features of CAN Bus and the microcontroller P87C591 are introduced, and the design of hardware circuit and soft configuration of the signals collection node based on P87C591 are presented. The problems in designing hardware circuit are discussed.Initialization subprogram, transmiting subprogram and receiving subprogram are emphasized in soft configuration.

    标签: P87C591 信号采集 节点

    上传时间: 2013-11-03

    上传用户:BIBI

  • 基于单片机与ADS1121的示波器数字多用表实现

    以FPGA为数字逻辑平台,借助继电器矩阵和多路模拟开关,以ADS1211为核心,在单片机控制下,联合实现手持式虚拟/智能存储示波表中数字多用表功能,实验表明该设计是行之有效的。文中介绍了数字多用表的系统结构,重点讨论了其测量电路和智能控制方案。   Abstract:  The digital multimeter in virtual/intellect digital-oscillorgaph was fulfilled, which was controlled by singlechip computer by relay matrix and analogue switches,in which FPGA was used for digital logical plot-form, ADS1211 for kernel chip, the experiment showed the design was feasible, the system struction was present-ed in the paper, measure circuit and intellect control plan of digital multimeter were mainly given.

    标签: 1121 ADS 单片机 示波器

    上传时间: 2013-11-02

    上传用户:瓦力瓦力hong

  • 高性价比单片机P89LPC932及其应用

    P89LPC932是Philips公司推出的高性价比单片机,该器件内含增强型CPU,同一工作频率下的速度为标准80C51单片机的6倍。文中介绍了P89LPC932的主要特点,给出了基于P89LPC932的车辆数据采集系统的组成框图。 Abstract:  The Philips P89LPC932 is a high cost-effective 8051-based microcontroller.High performance 2-clock 80C51 CPU providing 6 times the preformance of the standard 80C51.The main characteristic of P89LPC932? and its application in vehicle data collection system are given.

    标签: P89 LPC 932 89

    上传时间: 2013-10-28

    上传用户:gyq

  • 文字转发音单片处理器WTS701的原理及应用

    WTS701是华邦公司推出的内建喇叭驱动功能的“文字转发音”单芯片集成电路。该芯片将连续运算法与华邦专有的多层次储存技术相结合,从而实现了真正将“文字转发音”的完整功能。文中介绍了该芯片的原理及典型应用,给出了Cygnal F120 MPU与WTS701 的接口电路,并根据相应的芯片指令给出了其控制软件的代码程序。 Abstract:  WTS701 is really a single chip on “text-to-speech” produced by Winbond company building-in algorithm with the company's patented multi-level storageMLS technology熏 different from other chips that “text-to-speech” on the market at present. The principle and typical application of this chip are introduced in this article the interface circuit of Cygnal F120 MPU and WTS701 is presented. The corresponding? control software is provided.

    标签: WTS 701 发音 单片处理

    上传时间: 2013-10-08

    上传用户:旗鱼旗鱼

  • 基于DS1991和PIC单片机的智能水卡设计

    DS1991是一种多密钥信息纽扣,文章介绍了DS1991的主要特点、工作原理及读写方法。给出了一种基于DS1991和PIC单片机的智能水卡设计方案,同时给出了整个系统的硬件组成原理和软件设计方法。 Abstract:  DS1991 is a multikey iButton. The characteristic operation principle and the way of read/write of DS1991 are introduced in the paper. A smart water card based on DS1991 and PIC singlechip is presented the design of hardware and software are also given

    标签: 1991 PIC DS 单片机

    上传时间: 2013-11-06

    上传用户:李彦东

  • 基于PIC单片机的光电感烟探测器设计

    介绍了点型光电感烟探测器的工作原理,阐述了PIC16F676单片机的特殊功能,同时给出了该功能在探测器设计中的应用方法,最后给出了基于PIC16F676单片机设计的探测器的硬件构成和软件程序。 Abstract:  To begin with ,the principle of point type optical smoke detector is simply introduced and then the spe-cific functions of PIC16F676 are emphatically illuminated and it is also expounded that how to apply the specific functions in design of the detector.Furthermore the hardware and software design of detector are provided.

    标签: PIC 单片机 光电 感烟探测器

    上传时间: 2013-11-18

    上传用户:hanwudadi

  • 基于C8051F930的管道温度压力远程监测系统

       为解决输油管道温度压力参数实时监测的问题,设计了以C8051F930单片机作为控制核心的超低功耗输油管道温度压力远程监测系统。现场仪表使用高精度电桥采集数据,通过433 MHz短距离无线通信网络与远程终端RTU进行通信,RTU通过GPRS网络与PC上位机进行远程数据传输,在上位机中实现数据存储和图形化界面显示,从而实现输油管道温度压力参数的实时监测和异常报警。经实验证明,该系统的12位数据采集精度满足设计要求,漏码率小于1%,正常工作时间超过5个月,能实时有效地监测输油管道的温度压力参数,节省大量人工成本,有效预防管道参数异常造成的经济损失和环境污染。 Abstract:  In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters, the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection, the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU, the GPRS was used by the RTU to transmit data to the PC host computer, and the data was stored and displayed in the PC host computer, so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time, it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.

    标签: C8051F930 温度 压力 远程监测系统

    上传时间: 2013-11-07

    上传用户:cuibaigao

  • 基于AVR单片机的船舶气象仪测试系统的设计

       针对船舶气象仪保障维修而设计的船舶气象仪测试系统,包括信息处理终端、主仪器检测模块、传感器检测模块,各个模块都采用基于AVR单片机的嵌入式系统,模块之间通过CAN总线进行通信。结果表明,船舶气象仪测试系统能够快速检测船舶气象仪故障,与单纯依靠人工方式排查故障相比,故障检测时间缩短了60%以上。 Abstract:  The test system of ship meteorological instrument was developed to satisfy the maintenance of ship meteorological instruments,which composed of information processing terminal, testing module of main instrument and testing module of sensors. Each of these modules included an embedded system based on microcontroller of AVR series and communicated with other module by CAN bus. The results show that the test system can judge the fault of ship meteorological instrument quickly and shorten the fault detection time as much as 60% compared with simple manual troubleshooting.

    标签: AVR 单片机 气象仪 测试系统

    上传时间: 2013-11-23

    上传用户:stvnash

  • 基于C8051F340控制的TD直放站控制方案设计

    介绍一种基于C8051F340快速单片机控制的直放站设计;采用GPS同步法,按时隙功率控制,自动增益控制AGC环路,系统的非线性指标良好、抗干扰性强、可靠性高。比以功率检测的同步方法和基于特征窗搜索的同步方法实现简单,应用范围更广,可用于任何无线直放站应用场合,特别适用于干放及无线射频交换场合。

    标签: C8051F340 控制 直放站 方案设计

    上传时间: 2013-10-15

    上传用户:hanhanhan

  • PIC单片机在汽车电动车窗控制器中的应用

    本文以Microchip公司内部集成的CAN模块PIC18F258单片机为核心,介绍CAN总线电动车窗控制系统的硬件电路结构及软件设计流程。由于PIC18F258单片机对CAN收发器PCA82C250进行数据操作时只需要TXD、RXD两条数据线,这样就大大简化了硬件电路的设计,提高了系统的可靠性。

    标签: PIC 单片机 中的应用 汽车电动

    上传时间: 2013-11-08

    上传用户:brilliantchen