Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent
1989-12-12
1991-07-09
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Returned signal used for control
367 13, 377 8, H01S 1504
Patent
active
050311565
ABSTRACT:
Articles, moving along a delivery path, are counted by directing a stream of pressurized air toward one major surface of the passing articles, the direction of the air stream being transverse to the direction of travel. Sensors arranged about the air stream detect the acoustic signal which varies with changes in the profile of the passing articles, exemplified by signatures. The detected acoustic signal is divided into a plurality of frequency ranges which, in one preferred emboidment, are averaged to reduce the effect of noise which may be present in only limited ones of the frequency bands. The averaged signals are then compared against thresholds to determine the instantaneous state of the articles, exemplified by a signature stream, to generate count signals.
REFERENCES:
patent: 3543930 (1970-01-01), Delbridge et al.
patent: 3545674 (1970-12-01), Hanibicki
patent: 3589599 (1971-06-01), Brandt
patent: 3702925 (1972-11-01), Anderson et al.
patent: 3720311 (1973-03-01), Harrison, Jr.
patent: 3746841 (1973-07-01), Fenske
patent: 3813522 (1974-05-01), McCarthy
patent: 3891960 (1975-06-01), Widner
patent: 4439844 (1984-03-01), Menin
patent: 4460987 (1984-07-01), Stokes et al.
patent: 4528679 (1985-07-01), Shahbaz et al.
patent: 4576286 (1986-03-01), Buckley et al.
Panasonic Ad., Playboy, Jan. 1988, p. 72.
Johnson William A.
Sawabini Charles E.
Watts Leonard A.
EDS Technologies Inc.
Pihulic Daniel T.
LandOfFree
Method and apparatus for detecting and counting articles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting and counting articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting and counting articles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-623550