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Wireless Sensor Network

机译:无线传感器网络

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摘要

Current and future requirements of aerospace sensors and transducers demand the design and development of a new family of sensing devices, with emphasis on reduced weight, power consumption, and physical size. This new generation of sensors and transducers will possess a certain degree of intelligence in order to provide the end user with critical data in a more efficient manner. Communication between networks of traditional or next-generation sensors can be accomplished by a Wireless Sensor Network (WSN) developed by NASA's Instrumentation Branch and ASRC Aerospace Corporation at Kennedy Space Center (KSC), consisting of at least one central station and several remote stations and their associated software. The central station is application-dependent and can be implemented on different computer hardware, including industrial, handheld, or PC-104 single-board computers, on a variety of operating systems: embedded Windows, Linux, VxWorks, etc. The central stations and remote stations share a similar radio frequency (RF) core module hardware that is modular in design. The main components of the remote stations are an RF core module, a sensor interface module, batteries, and a power management module. These modules are stackable, and a common bus provides the flexibility to stack other modules for additional memory, increased processing, etc. WSN can automatically reconfigure to an alternate frequency if interference is encountered during operation. In addition, the base station will autonomously search for a remote station that was perceived to be lost, using relay stations and alternate frequencies. Several wireless remote-station types were developed and tested in the laboratory to support different sensing technologies, such as resistive temperature devices, silicon diodes, strain gauges, pressure transducers, and hydrogen leak detectors.
机译:航空航天传感器和换能器的当前和未来需求要求设计和开发新的传感设备系列,并着重于减轻重量,降低功耗和减小物理尺寸。新一代的传感器和换能器将具有一定程度的智能,以便以更有效的方式为最终用户提供关键数据。传统或下一代传感器网络之间的通信可以通过由NASA仪器分公司和位于肯尼迪航天中心(KSC)的ASRC航天公司开发的无线传感器网络(WSN)来完成,该无线传感器网络包括至少一个中央站和几个远程站,以及他们相关的软件。中心站取决于应用程序,可以在各种操作系统(嵌入式Windows,Linux,VxWorks等)的不同计算机硬件(包括工业,手持式或PC-104单板计算机)上实现。远程站共享类似的模块化设计的射频(RF)核心模块硬件。远程站的主要组件是RF核心模块,传感器接口模块,电池和电源管理模块。这些模块是可堆叠的,公共总线为堆叠其他模块提供了灵活性,以增加内存,增加处理能力等。如果在操作过程中遇到干扰,WSN可以自动将其重新配置为备用频率。另外,基站将使用中继站和备用频率自主搜索被认为丢失的远程站。在实验室中开发并测试了几种无线远程站类型,以支持不同的传感技术,例如电阻温度设备,硅二极管,应变仪,压力传感器和氢泄漏检测器。

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