无线抢答记分系统以AT89S52/51单片机为控制核心,主持人电路可实现有效抢答信号的无线译码接收与识别显示、抢答倒计时、答题倒计时、提示报警等功能,选手电路可实现抢答信号的编码与无线发送、分数数据的无线译码接收显示,主持人和选手之间通信采用UM3758-108A编译码器和红外发送接收模块配合实现。
上传时间: 2013-11-02
上传用户:zmy123
本文是基于C8051F单片机的便携式农田基础信息采集系统的设计方案,为了克服现有农田综合数据采集设备的移动性差,高成本,使用复杂的不足,本文提供一种便携嵌入式农田基础数据采集终端,该终端具有体积小、功耗低、携带性好、操作简单、安装方便、模块化和可扩张性及网络化功能,农业生产管理人员可以随意携带到田间地头进行使用。
上传时间: 2013-11-09
上传用户:huyanju
曲达科技所有标准HMI 产品均采用异步、全双工串口(UART),串口模式为8n1,即每个数据传送采用10个位:1 个起始位,8 个数据位(低位在前传送,LSB),1 个停止位。 上电时,如果终端的I/O0 引脚为高电平或者浮空状态,串口波特率由用户预先设置,范围为1200-115200bps ,具体设置方法参考0xE0 指令。
上传时间: 2013-11-07
上传用户:苏苏苏苏
单片机无线串行接口电路设计
上传时间: 2014-01-16
上传用户:aix008
无线遥控模块(单片机)
上传时间: 2013-10-13
上传用户:netwolf
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
以C8051F020为核心处理器,设计无线传感器网络数据采集系统。系统采用SZ05-ADV型无线通讯模块组建Zigbee无线网络,结合嵌入式系统的软硬件技术,完成终端节点的8路传感器信号的数据采集。现场8路信号通过前端处理后,分别送入C8051F020的12位A/D转换器进行转换。经过精确处理、存储后的现场数据,通过Zigbee无线网络传送到上位机,系统可达到汽车试验中无线测试的目的。 Abstract: This paper designs a wireless sensor network system for data acquisition with C8051F020 as core processors.The system used SZ05-ADV wireless communication module,set up a Zigbee wireless network, combined with hardware and software technologies of embedded systems,completed the end-node 8-locale sensor signal data acquisition.Eight locale signals were sent separately into the 12-bit ADC of C8051F020 for conversion through front treatment.After accurate processing and storage,the locale data was transmitted to the host computer through Zigbee wireless.The system achieves the purpose of wireless testing in vehicle trial.
标签: C8051F020 Zigbee 汽车测试 系统设计
上传时间: 2013-11-23
上传用户:dsgkjgkjg
为提高温度测量效率,降低系统的成本,扩展传输距离,设计出一种新型温度采集系统。单片机通过控制具有单总线方式的温度传感器DS18B20实现对温度的测量,同时单片机通过控制具有单总线方式300~450MHz频率范围内的MAX7044与MAX7033无线发射与接收芯片实现温度数据的无线传输。与传统温度采集系统相比,该系统利用单总线方式连接,采用无线传输方式实现远距离通信,易于系统的集成与扩展。实验结果表明,该系统结构简单、方便移植,能够同时实现多达上百点温度的测量与500m范围的传输。 Abstract: To improve the temperature measurement efficiency and reduce system cost,expansion of transmission distance,a new type of temperature acquisition system is designed.Microcontroller controlled temperature sensor DS18B20which has a single-bus achieves temperature measurement,while microcontroller by controlled the MAX7044and MAX7033chip with a single-bus and having300~450MHz radiofrequency to achieve the wireless transmission of temperature data.Compared with conventional temperature acquisition system,the system uses single-bus connected,and uses wireless transmission means to achieve long-distance communications,easy-to-system integration and expansion.The experimental results show that the system is simple,convenient transplantation,and can be implemented in as many as a hundred-point temperature measure-ment and the transmission range of500meters.
上传时间: 2013-10-29
上传用户:515414293
介绍一种简单射频识别系统设计。该设计包括阅读器、应答器和线圈3部分。由单片机控制阅读器向应答器发射无线信号,并接收应答器回送的信号,再通过分析回送信号识别物品。阅读器和应答器之间以半双工通信方式通信。 Abstract: A simple design of radio frequency identification system is given in this paper.The design includes reader,responder and winding.Through MCU,signals are sent to responder from reader,then corresponding signals are sent back. According to the analysis of the signals sent back,the objects can be identified.Half-duplex communication is adopted? between? reader? and? responder.
上传时间: 2013-10-11
上传用户:plsee
为了提高环境参数采集的自动化水平,提升效率,设计了无线传感器系统。本系统运用了传感器技术、通信技术和单片机技术,实现了对环境温度、湿度、光照度以及可燃性气体浓度等参数的检测。它能够实时地与上位机进行无线通信,满足对环境参数实时监测的要求。 Abstract: In order to increase the degree of automation and improve the efficiency of the environment monitoring parameters,the wireless sensor system was developed.Combining with the technique of sensor,automatic monitoring,communication and single-chip microcomputer,it realized real-time monitoring environment parameters,such as temperature,humidity,illumination,concentration of com- bustible gas and so on.At the same time it can communicate with upper personal computers,satisfy the desire of real-time monitoring.
上传时间: 2013-11-22
上传用户:longlong12345678