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智能建筑的物联网传感器的桥梁设计

消耗积分:0 | 格式:rar | 大小:0.23 MB | 2017-05-13

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智能建筑的物联网传感器的桥梁设计
 
  传感器是物联网的眼睛和耳朵(物联网)。他们提供所需的数据来了解环境,因此可以作出明智的决定,需要采取什么样的活动。智能建筑,特别是,可以受益于广泛部署的传感器,使能源的使用可以控制的最佳照明,供暖和空调。建筑安全可以通过传感器来检测员工的安全水平和控制建筑物或房间的访问。在紧急情况下,可以提高安全性,提供安全出口的通知,并在停电时提供应急照明。
 
  传感器通常工作在非常低的功率,这可以限制他们的沟通能力,在长距离和高数据速率。通常桥接设备用于收集和处理各种本地低功耗传感器读数,然后转发使用远程协议的汇总数据。采用Wi-Fi?模块、嵌入式处理器是用户可编程的可以很容易地创建中级物联网桥接系统。本文将看看这些模块中的一些来说明,与一个例子实现,如何Wi-Fi模块/基于MCU的设计可以很容易地聚集和沟通传感器数据在智能建筑物联网应用。
 
  
 
  Bridging for power efficiency
 
  In smart buildings sensors can generate a very wide range of data bandwidths. Environmental monitors may only transmit a small number of bytes of data a few times a second, while security cameras might have megabytes of data to transmit in the same time period. Even low bandwidth connects can generate significant data traffic when many sensors are aggregated and buffered. Often it is much more power efficient to “burst” data at a higher data rate instead of sending it one small data transmission at a time.
 
  In order to manage the wide range of data bandwidth requirements and the range of distances wireless signals can span in a smart building, bridging devices are required. In addition, bridging devices can be used to optimize the power requirements of autonomous low-power sensors, where battery lifetime, particularly in emergency situations, can be critical. Bridging devices must handle a variety of wireless protocols, from Bluetooth? low energy (Bluetooth LE) to the full range of Wi-Fi connectivity schemes. Additional requirements for a robust smart building design would include local data storage, local energy storage in case of power loss, and perhaps a simple user interface for status, diagnostics, and local control.
 

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