Measuring torque, work, mechanical power, or mechanical efficiency in general

GPHYSICS G01Measuring instruments G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE

G01L3/00Measuring torque, work, mechanical power, or mechanical efficiency in general

G01L3/02Rotary-transmission dynamometers G01L3/04wherein the torque-transmitting element comprises a torsionally-flexible shaft G01L3/045by measuring variations of frequency of stressed vibrating elements G01L3/06involving mechanical means for indicating G01L3/08involving optical means for indicating G01L3/10involving electrical or magnetic means for indicating G01L3/101involving magnetic or electromagnetic means G01L3/102involving magnetostictive means G01L3/103Details about the magnetic material used G01L3/104involving permanent magnets G01L3/105involving inductive means G01L3/106involving electrostatic means G01L3/107involving potentiometric means G01L3/108involving resistance strain gauges G01L3/109involving measuring phase difference of two signals or pulse trains G01L3/12involving photoelectric means G01L3/14wherein the torque-transmitting element is other than a torsionally-flexible shaft G01L3/1407involving springs G01L3/1414using mechanical or hydraulic transducers G01L3/1421using optical transducers G01L3/1428using electrical transducers G01L3/1435involving magnetic or electromagnetic means G01L3/1442involving electrostatic means G01L3/145involving potentiometric means G01L3/1457involving resistance strain gauges G01L3/1464involving screws and nuts, screw-gears or cams G01L3/1471using planet wheels or conical gears G01L3/1478involving hinged levers G01L3/1485involving fluidic means G01L3/1492involving electric couplings G01L3/16Rotary-absorption dynamometers G01L3/18mechanically actuated G01L3/20fluid actuated G01L3/205of the air brake type G01L3/22electrically or magnetically actuated G01L3/24Devices for determining the value of power G01L3/242by measuring and simultaneously multiplying torque and velocity G01L3/245by measuring and simultaneously multiplying pressure and velocity G01L3/247by measuring and simultaneously multiplying tractive or propulsive force and velocity G01L3/26Devices for measuring efficiency