Development of methods for dynamic force calibration Part 2 Absolute calibration of piezoelectric force transducers by laser interferometry
An absolute method for the calibration of piezoelectric force transducers using sinusoidally varying forces is described, giving results with total relative uncertainty of less than 0.6%. The method is based on Newton's second law: known masses are screwed onto the force transducer and the accelerations of the masses are determined by interferometry. A linear least squares fit is used to calculate the sensitivity and the end mass of the force transducer. The stiffness of the load masses and the mounting stiffness must be high enough to prevent relative motion. A special technique was used to reduce errors due to the transverse force sensitivity of the force transducer in combination with the transverse motion of the vibration exciter. A method was developed to determine the maximum transverse sensitivity of force transducers. For all transducers tested the bending moment sensitivity dominates.
Bibliographic Reference: EUR 12933 EN (1990) 135 pp., FS, ECU 11.25
ISBN: ISBN 92-826-1730-0
Record Number: 199011659 / Last updated on: 1994-12-02
Original language: en
Available languages: en