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Title: In-line rotating capacitive torque sensor

Abstract

A method and apparatus for measuring torques developed along a rotating mechanical assembly comprising a rotating inner portion and a stationary outer portion. The rotating portion has an electrically-conductive flexing section fitted between two coaxial shafts in a configuration which varies radially in accordance with applied torque. The stationary portion comprises a plurality of conductive plates forming a surface concentric with and having a diameter slightly larger than the diameter of the rotating portion. The capacitance between the outer, nonrotating and inner, rotting portion varies with changes in the radial configuration of the rotating portion. Signal output varies approximately linearly with torque for small torques, nonlinearly for larger torques. The sensor is preferably surrounded by a conductive shell to minimize electrical interference from external sources. 8 figs.

Inventors:
Publication Date:
Research Org.:
Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (USA)
OSTI Identifier:
5842873
Patent Number(s):
PATENTS-US-A7461962
Application Number:
ON: DE91011567; PPN: US 7-461962
Assignee:
Dept. of Energy
DOE Contract Number:  
AC09-76SR00001
Resource Type:
Patent Application
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; TORQUE; MEASURING INSTRUMENTS; MEASURING METHODS; CAPACITANCE; DESIGN; ELASTICITY; ELECTRIC CONDUCTIVITY; ENGINEERING DRAWINGS; MACHINE PARTS; MACHINERY; MATERIALS; ROTATION; SHAFTS; DIAGRAMS; ELECTRICAL PROPERTIES; MECHANICAL PROPERTIES; MOTION; PHYSICAL PROPERTIES; TENSILE PROPERTIES; 440800* - Miscellaneous Instrumentation- (1990-)

Citation Formats

Kronberg, J W. In-line rotating capacitive torque sensor. United States: N. p., 1990. Web.
Kronberg, J W. In-line rotating capacitive torque sensor. United States.
Kronberg, J W. Mon . "In-line rotating capacitive torque sensor". United States.
@article{osti_5842873,
title = {In-line rotating capacitive torque sensor},
author = {Kronberg, J W},
abstractNote = {A method and apparatus for measuring torques developed along a rotating mechanical assembly comprising a rotating inner portion and a stationary outer portion. The rotating portion has an electrically-conductive flexing section fitted between two coaxial shafts in a configuration which varies radially in accordance with applied torque. The stationary portion comprises a plurality of conductive plates forming a surface concentric with and having a diameter slightly larger than the diameter of the rotating portion. The capacitance between the outer, nonrotating and inner, rotting portion varies with changes in the radial configuration of the rotating portion. Signal output varies approximately linearly with torque for small torques, nonlinearly for larger torques. The sensor is preferably surrounded by a conductive shell to minimize electrical interference from external sources. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}