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Dai Y.,Xiamen Tobacco Industrial Co.
Tobacco Science and Technology | Year: 2014

The reasons causing frequent tobacco jam in feeding system of CTD (Comas Tower Dryer) were investigated by analyzing the orientation of air flow in the feeding system. Tobacco jam mainly occurred between feeding airlock and the end of expansion unit, it happened when restarting tobacco feeding after a long stoppage, the steam condensate accumulated in pipelines tended to retard tobacco's moving; or tobacco flow rate dropped abruptly, the downstream tobacco conveying belt failed to match the accelerated electronic scale, it caused tobacco piling up at the junction; during drying, violent pressure fluctuation in the system and intermittent tobacco jam resulted. The feeding system was improved by adding a drainage system, installing spike rollers on the downstream conveying belt of electronic scale and an embedded sleeve connection for pipeline joints. The results of application indicated that after improvement, the frequency of tobacco jam decreased from 2.3 to 0.2 times per batch and the standard deviation of moisture content in tobacco reduced from 3.8% to 1.7%. Tobacco moved steadily, and tobacco drying quality was improved. Source


Huang W.,Xiamen Tobacco Industrial Co.
Tobacco Science and Technology | Year: 2014

In order to effectively control the quality of cigarettes during production, the FMEA (Failure Mode and effects analysis) was applied in the risk management of product quality in the process of cigarette manufacturing according to the production characteristics and quality requirements of cigarette. After determining the key risk factors needed to be focused on by grading all risk factors, an FMEA method for the risk management of cigarette quality was developed, and an FMEA model for the risk management of product quality in the process of cigarette making and packing was established. The results showed that: FMEA product quality risk management could identify and control the risk points of cigarette quality throughout the manufacturing flow, which reduced product's quality risk and production cost effectively. The consumption of cigarette paper, filter rod and label decreased from 3220 to 3217 meters/case, 8395 to 8382 rods/case, 2512 to 2507 pieces/case, respectively. The production management level was improved. Source


Zhang Z.,Xiamen Tobacco Industrial Co.
Tobacco Science and Technology | Year: 2014

To reduce labor intensity and avoid tobacco jam, tobacco flow interruption and frequent start/stop operation in manual operation of the discharge from the silo type tobacco feeder, an automatic discharge speed adjusting system was designed with industrial Ethernet and distributed programmable control technology. The system was mainly composed of a programmable logic controller, frequency converters, motors and photoelectric switches. By monitoring the status of photoelectric switches installed on the high, middle and low levels of metering tube, the running frequencies of bottom belt and elevating belt were adjusted. The results showed that the automatic system reduced manual adjusting from 26 to 3 times/batch, tobacco jam, tobacco flow interruption and start/stop of equipment decreased from 3.4 to 0.2, from 2 to 0.2, and from 182 to 36 times/batch, respectively. It ensured the consistent tobacco flow supplying to the downstream equipment. ©, 2014, Editorial Office of Tobacco Science and Technology. All right reserved. Source


Xie L.,Xiamen University | Huang C.,Xiamen University | Chen B.,Xiamen Tobacco Industrial Co.
ICCRD2011 - 2011 3rd International Conference on Computer Research and Development | Year: 2011

In video coding, motion estimation is the most time consuming part due to its high computational complexity. Based on the high temporal and spatial correlation of motion vector (MV), a new fast motion estimation algorithm of UMHexagonS (UMH) has been proposed to reduce computational complexity by using relatively few search points without degrading image quality, in which the modified patterns with new uneven cross, multi-hexagon-grid and hexagon are applied to. The proposed algorithm alleviates the computational burden and maintains the quality of video. Compared with the original UMH algorithm, the proposed algorithm has a better performance, and it reduces the number of search points by 32% at least and preserves similar average peak signal-to-noise ratio (PSNR) value at the same time. © 2011 IEEE. Source


Wu Y.,Xiamen Tobacco Industrial Co.
Applied Mechanics and Materials | Year: 2012

In tobacco primary processing line, there are often processing emissions with as peculiar smells, condensed water and tobacco powder dusts discharged from the production of processing equipments. In this paper, through a detailed design on the concentrated moisture exhaust system of tobacco primary processing and its control methods, the moisture-exhaust air volume's instability caused by the starting and stopping of all processing equipments in production line is solved, so as to ensure the stabilities of processing equipment's parameters and cigarette's smoke flavors and simultaneously improve the effect of processing the peculiar smells of emissions. © (2012) Trans Tech Publications, Switzerland. Source

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