Acoustic polarimeter

Measuring and testing – Vibration – By mechanical waves

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

73645, G01N 2900

Patent

active

045011508

ABSTRACT:
An acoustic polarimeter is provided for measuring the acoustic birefringence of a plate with parallel faces.
The plate to be measured is fixed to one face of an acoustically isotropic body and to the other face are fixed transducers having their linear transfer axis at 90.degree. from each other transmitting waves at pulsation .omega. modulated respectively by cos .OMEGA.t and sin .OMEGA.t. After reflection from the rear face of the sample, the signals X.sub.1 and Y.sub.1 received by the transducers are processed in processing circuits. The signals x.sub.1 and y.sub.1 are multiplied by a signal cos (.omega.t+.phi.) supplied by a phase-shifter controlled by a signal S.sub.1. After filtering, signals X and Y are obtained which are used for generating two signals A and B. A microprocessor receiving the amplitudes of these signals A and B controls the phase-shifter and supplies the birefringence angle .phi.. The direction of the first axis is obtained by synchronous detection of signal A.sub.1 by sin 2 .OMEGA.t.

REFERENCES:
patent: 3587297 (1968-09-01), Kammer
patent: 4138894 (1979-02-01), Robert et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Acoustic polarimeter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acoustic polarimeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic polarimeter will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-511533

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.