Angular acceleration measurement

Progress 25 May 2004

PTB provides traceability in the area of angular acceleration measurements. Calibrations of angular acceleration reference standards at sinusoidal acceleration are available in the frequency range from 0.5 Hz to 1 000 Hz (angular acceleration amplitude range 1 rad/s^2 to 1 400 rad/s^2). The relative expanded uncertainty of measurement (k = 2, P = 95 %) of the transducer sensitivity is 0.3 % from 0.5 Hz to 160 Hz, and <= 0.5 % at higher frequencies.

Primary angular vibration calibrations by laser interferometry in analogy to ISO 16063-11: 1999* are also available for angular velocity transducers and rotation angle transducers (max. angular velocity amplitude 40 rad/s, max. rotation angle amplitude 0.5 rad).

In addition to the magnitude of complex sensitivity of transducers, the phase shift can be measured by laser interferometry in analogy to ISO 16063-11: 1999 (expanded uncertainty 0,5° from 0,5 Hz to 1 000 Hz).

* The new standard ISO 16063-15"Primary angular vibration calibration by laser interferometry" specifying the methods used at the PTB is under development (currently at DIS stage).

Progress

PTB provides traceability in the area of angular acceleration measurements. Calibrations of angular acceleration reference standards at sinusoidal acceleration are available in the frequency range from 0,5 Hz to 1000 Hz (angular acceleration amplitude range 1 rad/s^2 to 1400 rad/s^2). The relative total uncertainty of measurement of the transducer sensitivity is 0,3% from 0,5 Hz to 160 Hz, and <= 0,5% at higher frequencies (k = 2, P = 95%).

Absolute calibrations are also available for angular velocity transducers and rotation angle transducers (max. angular velocity amplitude 40 rad/s, max. rotation angle amplitude 1 rad, at present).

In addition to the magnitude of complex sensitivity of transducers, the phase shift can be measured by laser interferometry in analogy to ISO 16063-11: 1999.