Patent ID: 7019514
Filing Date: 2006-03-28
Classification: G01D,Y10T

Abstract:
1. A linear variable differential transformer (LVDT) system comprising: a) a rotary input; b) a rotary output; c) a gear reduction system between the rotary input and the rotary output for transferring the rotary input into rotation of the rotary output and reducing the angular rotation of the rotary output relative to the angular rotation of the rotary input; d) one or a multiple of LVDTs, each LVDT comprising an internal magnetic member and a coil assembly, the coil assembly comprising a primary coil between two secondary coils, an alternating current in the coil assembly, the LVDT measuring the differential voltage between the two secondary coils as the magnetic member moves relative to the two secondary coils; and e) a translating member translating on the rotary output and being operably connected to the magnetic members of the LVDTs.