Wireless Linear Variable Differential Transformer Design and Structural Performance Analysis

In this paper, design and performance analysis of wireless deflection sensors with an automated test-bed is reported. A test bed is designed and built to accurately move an armature of a displacement sensor through the operational range in a repeatable fashion. Testing is conducted on an RDP D2/200a linear variable displacement transformer (LVDT) to compare operational performance in both wired and wireless configurations. Test results are presented and conclusions are drawn regarding the possibility of switching existing wired hardware with equivalent wireless powered units. Prototypes of the wireless displacement sensor are constructed and tested in WiSe-Net lab at the University of Maine and at NASA MSFC to compare the performance with existing wired displacement sensor system. Lower cost and similar performance demonstrates the suitability of using this new technology while maintaining reliability and accuracy.