Accession Number : ADA254712


Title :   An Improved Strain-Gage Signal Conditioner for Dynamic Stress Measurement


Corporate Author : SVERDRUP TECHNOLOGY INC ARNOLD AFS TN


Personal Author(s) : Mahrenholz, Bob G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254712.pdf


Report Date : May 1991


Pagination or Media Count : 16


Abstract : A new signal conditioning circuit has been developed for single-active-arm strain gages typically used for dynamic stress measurement on turbine engine rotor blades. This new circuit uses constant-voltage excitation and corrects for lead wire resistance changes by automatically controlling resistances in series with the lead s to the gage. This technique provides a balanced configuration which offers better high-frequency common-mode rejection and has less broadband noise than with constant-current excitation but still is insensitive to lead wire resistance changes. Also included is a unique Delta R calibration circuit that provides a more accurate simulation of actual gage resistance change. The circuits described may be useful in any AC-coupled strain-gage system.


Descriptors :   *ROBOTICS , *DETECTORS , *MANIPULATORS , CONTROL , DYNAMICS , HANDS


Subject Categories : Human Factors Engineering & Man Machine System


Distribution Statement : APPROVED FOR PUBLIC RELEASE