| 摘要 |
This invention mainly concerns apparatus for calculating the standard deviation of the mass of a succession of cigarettes being produced on a continuous-rod cigarette making machine. The device receives, from a Beta-ray scanning device, a continuously varying voltage indicative of the tobacco mass of a given portion of the continuous rod, and a series of pulses synchronised with the cut-off so that a pulse appears whenever a portion of the continuous rod which will later be cut is subjected to the Beta-radiation beam. The continuously varying voltage is integrated over the period between the pulses to give a measure of the total mass of tobacco in the portion of the rod which will become an individual cigarette. |
