Arrangement for establishing and/or monitoring a predetermined f

Details Arrangement for establishing and/or monitoring a predetermined f Arrangement for establishing and/or monitoring a predetermined f

1998-04-03

2000-11-21

Williams, Hezron

Measuring and testing

Liquid level or depth gauge

73291, 340620, 340621, G01F 2328, G08B 2100

Patent

active

061486655

ABSTRACT:
An arrangement for establishing and/or monitoring a predetermined filling level is described, in which a fixed phase difference (.DELTA..phi..sub.R), which is independent of the oscillation quality of the arrangement, exists between a transmission signal and a reception signal (E) at the resonant frequency of the mechanical oscillatory structure. This arrangement comprises a mechanical oscillatory structure (1) at least one transmitter (3), which excites the oscillatory structure (1) to produce oscillations, and two piezoelectric elements as receivers (24a, 24b). In accordance with a first variant, a first signal line (241a) of the first receiver (24a) is connected to an electrode which is arranged on a surface which bounds the first receiver (24a) in a direction opposite to its polarization. A second signal line (241b) of the second receiver (24b) is connected to the transmission signal line (5) via an electrical impedance (Z). The second signal line (241b) of the second receiver (24b) is connected to an electrode which is arranged on a surface which bounds the receiver (24b) in the direction of its polarization. The reception signal (E) is equal to the difference between the two electrical signals (E.sub.1, E.sub.2).

REFERENCES:
patent: 3266311 (1966-08-01), Andreasen et al.
patent: 5191316 (1993-03-01), Dreyer
patent: 5264831 (1993-11-01), Pfeiffer
patent: 5408168 (1995-04-01), Pfandler
patent: 5625343 (1997-04-01), Rottmar
patent: 5631633 (1997-05-01), Dreyer et al.
patent: 5895848 (1999-04-01), Wilson et al.
patent: 5969621 (1999-10-01), Getman et al.

Affiliated with

Also associated with

Rating

Arrangement for establishing and/or monitoring a predetermined f does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for establishing and/or monitoring a predetermined f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for establishing and/or monitoring a predetermined f will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1247390