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工业自动化中低功耗无线网络的不同协议评估
低功耗正在成为工业自动化网络设计和实现中的一个越来越重要的因素，并且有新的协议可以帮助降低功耗和成本。
尽管人们认为功耗并不是工业自动化中的一个关键设计问题，但由于几个原因，低功耗设计在过去几年中变得非常重要。首先是明显的权力成本。更多的系统被远程控制，控制器和无线系统的功耗增加。这在世界范围内达到了数百万美元，削减这个法案是石油价格如此高的一个重点。许多工业用户也有依赖于电力供应的关税，而且在需求量增加的情况下，他们的电力供应会减少，使电力的运营能力降低。
无线技术可以用多种方式来降低电力成本。通过低功率硅、适当的协议和功率感知软件降低无线收发器的功耗，有助于降低直接成本。此外，无线控制器也可用于工厂周围控制暖气，照明和高压空调的水平，这取决于当时的活动和人员配置水平。这可以大大降低设备的整体直接功耗。
There are other drivers for cutTIng the power consumpTIon. Technology developments in the design and manufacture of the transceiver silicon are now bringing wireless devices and modules within the abiliTIes of energy harvesTIng. This means that power scavenged from the environment – often from vibrations or the temperature of the factory floor – can be used to power a sensor and a wireless link without the need to replace a battery regularly. This allows sensors to be placed in a larger number of locations that were not previously accessible if they needed a cable or battery replacement. This allows equipment to be more closely monitored， and repaired or replaced before a failure brings the manufacturing line to a halt. This use of wireless sensors also brings direct cost savings to industrial customers.
