Fourier analyzer

Fourier analyzer

[‚fu̇r·ē‚ā ′an·ə‚līz·ər]
(engineering)
A digital spectrum analyzer that provides push-button or other switch selection of averaging, coherence function, correlation, power spectrum, and other mathematical operations involved in calculating Fourier transforms of time-varying signal voltages for such applications as identification of underwater sounds, vibration analysis, oil prospecting, and brain-wave analysis.
References in periodicals archive ?
The VI simulates the Fourier analyzer apparatus and it is possible to be used in the assisted research of the many other mechanical applications where it is necessary to know the vibration spectrum and how the constructive and functional parameters and the mouvements cases determine the major changes of the spectrum.
The experimental Fourier analyzer contains the following modules: the module of the on-line command with many different characteristics of the velocities; the module of the data acquisition what assures the two channels of the acceleration acquisition between the motor of the shoulder and the end-effector; the mathematical module what determine the transfer function between the motor and the end-effector in the different movements and the Fourier transformation.
In the Fourier analyzer a propagating acoustic wave, either in the bulk or on the surface, interacts with an optical beam to give a set of diffracted optical outputs whose angular deflection is proportional to the frequency of the acoustic wave.