Phase regulating apparatus of ultrasonic measuring devices

Details Phase regulating apparatus of ultrasonic measuring devices Phase regulating apparatus of ultrasonic measuring devices

1991-11-25

1993-12-21

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73625, 12866101, G01N 2904

Patent

active

052712761

ABSTRACT:
A frequency transfer type phase adjustment apparatus for frequency-transferring a plurality of reception signals derived from arrayed ultrasonic transducer elements into low frequency components by mixing these reception signals with a reference signal, and for applying delays to these low frequency components so as to be summed with each other, comprises small delay circuits for applying very short delays to the respective reception signals before being frequency-transferred; and a quantizing delay circuit for applying delays obtained by multiplying a delay time unit by an integer, to the respective reception signals after being frequency-transferred. A ratio of the delay time unit to one-cycle period of the reference signal is equal to an integer ratio. Phase shifters are inserted into either the output sides or the input sides of the mixers for the respective signal channels used for the frequency transfer operation. These phase shifters are capable of selectable phase shift amounts from a finite number of phase shift amounts which have been prepared for compensating phase differences in the delayed reception signals.

REFERENCES:
patent: 4140022 (1979-02-01), Masalak
patent: 4387597 (1983-06-01), Brandestini
patent: 4550607 (1985-11-01), Masalak et al.
patent: 4633308 (1986-12-01), Dukes et al.
patent: 4662223 (1987-05-01), Riley et al.
patent: 4700573 (1987-10-01), Savord
patent: 4779242 (1988-10-01), Lannuzel

Affiliated with

Also associated with

Rating

Phase regulating apparatus of ultrasonic measuring devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase regulating apparatus of ultrasonic measuring devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase regulating apparatus of ultrasonic measuring devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-301956