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Wireless instrumentation system experiment

机译：无线仪表系统实验

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This article describes the design details of a Wireless Instrumentation System that was experimented in ISRO's recent Human in Space Project (HSP) Pad Abort Test (PAT) mission in piggy-back mode. The system consists of a few Wireless Sensor Nodes (WSNs) that acquire parameter data and a Wireless Base Station that collects these over an IEEE 802.15.4 compatible single-hop RF link and forward it to the telemetry subsystem. The circuit configuration, communication link and protocol as well as the measurement plan as adopted for HSP-PAT flight test are described to bring out the scalability of the architecture. The performance of the system in HSP-PAT mission is discussed in detail by way of PFA analysis results. All the parameters monitored through the system, including inertial ones such as acceleration and rotation were compared with reference data obtained from functional Telemetry Telecommand and Power and Navigation Guidance and Control chains and showed normal signatures. Maintaining an uninterrupted wireless communication channel in a hostile and crowded chamber like the Crew Module for all the nodes has called for a robust Medium Access Control (MAC) layer based on the industry-popular IEEE802.15.4 RF PHY. The requirement of such a robust MAC layer is established when the radio frequency links outage encountered in one of the WSN links during the interval of high vehicle dynamics is seen to be taken care of by the diverse link of the same node. A future roadmap towards self-powered wireless sensors is also outlined.
机译：本文描述了一个无线仪器系统的设计细节，该系统在ISRO最近的载人航天项目（HSP）Pad中止测试（PAT）任务中以背驮模式进行了试验。该系统由几个采集参数数据的无线传感器节点（WSN）和一个无线基站组成，无线基站通过与IEEE 802.15.4兼容的单跳射频链路收集这些数据，并将其转发给遥测子系统。描述了HSP-PAT飞行试验所采用的电路结构、通信链路和协议以及测量方案，以展示该体系结构的可扩展性。通过PFA分析结果详细讨论了该系统在HSP-PAT任务中的性能。通过该系统监测的所有参数，包括加速度和旋转等惯性参数，都与从功能遥测遥控、动力和导航制导和控制链获得的参考数据进行了比较，并显示出正常特征。在敌对且拥挤的房间（如乘员舱）中为所有节点维持不间断的无线通信信道，需要基于业界流行的IEEE802的强大媒体访问控制（MAC）层。15.4射频物理层。当在高车辆动态间隔期间，其中一个无线传感器网络链路中遇到的射频链路中断被视为由同一节点的不同链路处理时，就建立了这种鲁棒MAC层的要求。此外，还概述了自供电无线传感器的未来路线图。

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