Device for indicating changes in the position of an object

Details Device for indicating changes in the position of an object Device for indicating changes in the position of an object

1974-11-04

1976-08-03

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 12R, 343 177, G01S 740, G01S 904

Patent

active

039732592

ABSTRACT:
Apparatus for measuring vibrations in turbines and like objects in which electromagnetic signals are directed at the object by a transmitter and reflections of the signals from the object are received by a signal receiver. The transmitted and received signals are continuously compared to provide a signal representative of the phase relationship therebetween. The latter signal is used in calibrating apparatus which further includes means for intermittently frequency modulating the transmitter oscillator and provides automatic control of the oscillator frequency to bring the mean frequency of the transmitted signal to a value such that the phase difference between the transmitted and received signals is equal to n.sup.. 180.degree., wherein n is an interger. Between the intermittent calibration periods, the signal representative of the phase relationship is applied to indicating means as indicative of the vibrations of the turbine.

REFERENCES:
patent: 3199103 (1965-08-01), Augustine
patent: 3730628 (1973-05-01), Wolcott et al.

Affiliated with

Also associated with

Rating

Device for indicating changes in the position of an object does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for indicating changes in the position of an object, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for indicating changes in the position of an object will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1932742