×

Low Power,远程,ISM无线测量节点

消耗积分:0 | 格式:rar | 大小:0.20 MB | 2017-08-15

分享资料个

  Low Power,远程,ISM无线测量节点

  一种低功耗无线传感器节点不必是短程或复杂的。本文介绍了一种简单、廉价的双芯片解决方案。

  理想情况下,无线测量节点具有功耗低、范围广、易于连接到不同传感器的特点。通过三个模拟设备,公司部分的组合,与<70μ平均电流消耗智能测量节点,射程近1公里(自由空间),和数据率传输/分钟是可以实现的,同时还保持一个16位的ADC性能(见图1)。这使得电路适用于电池供电以及自动化和遥感等应用。

  Low Power,远程,ISM无线测量节点

  Figure 1: Low-power, long range, ISM wireless measurement node (simplified schematic: all connections and decoupling not shown)。

  The ADuC7060 precision analog microcontroller has a low-power ARM7 core as well as a myriad of precision analog functions. The onboard multiplexer, digitally programmable gain amplifier (PGA), voltage reference, programmable current sources, and 24-bit sigma-delta ADC allow almost any temperature and bridge sensors to be directly connected. In this case, a four-wire Pt100 (100 Ω platinum RTD) temperature sensor was chosen. Further details on the measuring circuit can be found in the AN-0970 Application Note.

  The system consists of a low-power temperature measurement node that wakes once a minute, measures temperature, transmits this measurement at 10 kbps to the base node, and returns to sleep. The base node continuously listens for a package from the measurement node and sends this information to the PC via the UART for display in HyperTerminal.

声明:本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人,不代表电子发烧友网立场。文章及其配图仅供工程师学习之用,如有内容侵权或者其他违规问题,请联系本站处理。 举报投诉

评论(0)
发评论

下载排行榜

全部0条评论

快来发表一下你的评论吧 !