Method of detecting deviation in position and misshape of transp

Details Method of detecting deviation in position and misshape of transp Method of detecting deviation in position and misshape of transp

1992-07-15

1994-11-22

Bahr, Jennifer

Tobacco

Cigar or cigarette making

131 94, 198360, A24C 500

Patent

active

053659490

ABSTRACT:
This invention relates to a method of detecting deviation in position and misshape of transported objects which have a predetermined shape and are successively transported at predetermined intervals with the transported objects being maintained in a predetermined direction, comprising the steps of: generating synchronizing signals corresponding to the transportation intervals on a predetermined cycle; detecting passage of end portions of the transported objects at predetermined positions; calculating a time interval between the generation of the synchronizing signals and the passage of the end portions; calculating a mean value and a standard deviation for a prescribed number of the transported objects from time series information; judging a transported object as an object of which position is deviated or shape is deformed when the difference between measured time interval and the mean time interval is larger than a criterion which is calculated based on the standard deviation; replacing the oldest information on the time interval in the time series information with information on time interval of a transported object which is judged that a position thereof is not deviated or a shape thereof is not deformed to renew the time series information; and calculating a mean value and a standard deviation for the renewed time series information so as to be used for the judgment.

REFERENCES:
patent: 3874391 (1975-04-01), Dogl et al.
patent: 4044779 (1977-08-01), Preston et al.
patent: 5022644 (1991-06-01), Burge
patent: 5038915 (1991-08-01), Delsanto
patent: 5165520 (1992-11-01), Herve et al.

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