Traceability of vibration and shock measurements by laser interferometry

• Published in: Measurement Vol. 28; no. 1; pp. 3 - 20
• Main Authors: von Martens, Hans-Jürgen, Täubner, Angelika, Wabinski, Wolfgang, Link, Alfred, Schlaak, Hans-Joachim
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.07.2000; Elsevier
• Subjects: Acceleration; Calibration; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Interferometer; Interferometers; Laser vibrometer; Mechanical instruments, equipment and techniques; National standard; Optical instruments, equipment and techniques; Physics; Shock; Solid mechanics; Structural and continuum mechanics; Traceability; Vibration; Vibration isolation; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Vibrations and mechanical waves; Traceability; Shock; Vibration; Interferometer; National standard; Laser vibrometer; Calibration; Acceleration; Acceleration measurement; Laser interferometer; Shock measurement; Standard; Experimental study; Vibration source; Vibrometer; Interferometers
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/S0263-2241(00)00003-8

The paper describes how laser interferometry can be used to respond to the increasing demands from industry and elsewhere that the traceability of vibration and shock measurements to SI units be established or improved. As an example of the top level of a hierarchic traceability system, the paper focuses on six different national standard devices using laser interferometry to ensure the realization and dissemination of the three translational motion quantities: acceleration, velocity and displacement, and the three rotational motion quantities: angular acceleration, angular velocity and rotation angle, in wide measurement ranges with sinusoidal, shock-shaped and other user-defined time histories. The application of the methods to the primary calibration of transducers (including laser interferometers as calibration objects) is demonstrated. The best expanded uncertainties verified by experiments (e.g., international comparisons) are 0.1% for sinusoidal translational motion quantities, 0.2% for sinusoidal rotational motion quantities and 0.3% for shock-shaped accelerations. The high accuracy of the primary calibration facilities serves, among other things, to investigate the behaviour of special laser vibrometers intended to be qualified as reference laser vibrometers applicable as a sub-system of calibration equipment, e.g., in a service calibration laboratory.