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FBG optical sensors for environmental tests of microsatellites

机译：FBG光学传感器，用于微卫星环境测试

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The use of Fiber Bragg grating sensors is growing in many fields thanks to their properties such as the immunity to electric and magnetic fields and the capability to realize a distributed network of sensors exploiting the multiplexing capabilities. In this paper the use of FBG sensors during the environmental tests performed on a specimen in the thermo-vacuum chamber of the LARES-LAB will be presented. The test chamber has been realized for the optical tests of the LARES satellite, launched in 2012 and now, thanks to the small size of the test chamber, the facility can be proficiently used for testing small satellites as CubeSats and nanosatellites. The chamber has been upgraded adding an optical feed-through suitable for the use of FBG sensors that will let the real-time monitoring of the conditions of the test. A test campaign will be described and a specimen will be monitored using both optical strain gauges and standard sensors, thermal and mechanical stress will be applied in order to perform a comparison of the behaviour of the two types of sensors. The validation of the performances of the FBG sensors could open the road for a new methodology for testing satellites with a cheaper and more accurate stress monitoring system.
机译：光纤布拉格光栅传感器的特性，例如对电场和磁场的抗扰性以及利用多路复用功能实现分布式传感器网络的能力，使它们在许多领域得到了越来越多的使用。在本文中，将介绍在LARES-LAB热真空室中的样品进行环境测试期间使用FBG传感器的情况。该测试室已实现用于LARES卫星的光学测试，该测试室于2012年发射，如今，由于测试室尺寸小，该设施可以熟练地用于测试诸如CubeSats和纳米卫星的小型卫星。腔室经过升级，增加了适合于FBG传感器使用的光导通孔，可以实时监控测试条件。将描述测试活动，并使用光学应变仪和标准传感器对样本进行监控，将施加热应力和机械应力，以便对两种类型的传感器的性能进行比较。 FBG传感器性能的验证可以为使用便宜，更准确的应力监测系统测试卫星的新方法开辟道路。

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