JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 59, Issue 3
Displaying 1-16 of 16 articles from this issue
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Process Control and Automation
  • The Latest Elevator Control Technologies
    Shiro Hikita
    2005 Volume 59 Issue 3 Pages 330-335
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.330
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    An elevator group control system controls a multiple of elevator cars to improve the traffic efficiency in the building. In the recent group-control systems, AI (artificial intelligence) technologies, such as fuzzy theory and neural networks have been applied.
    In this paper, we introduce to the history of elevator group control, and the latest group control system “Sigma AI-2200” as a product example.
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  • The Basics, the Application and Great Possibilities of IC Tags
    Hiroshi Ohtsuka
    2005 Volume 59 Issue 3 Pages 336-343
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.336
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    IC Tag (RFID) has lately attracted considerable attention. IC tag is effective tool to solve the problems in the field of industries. But if we use it without understanding its essence, it would not give us any merits.
    At first this paper describes the basics of IC tags (RFID), for example communication method between tag and antenna, variation of IC Tags and its characteristics. The 2 nd issue is the introduction of some applications using IC tags (RFID). The last issue is the trends of standardization in the world and its possibilities in the future.
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Topics & Information
  • Optimizing The Pulping Process by Using a New On-Line Analyser and Experiences from Pulp Mills
    Jörgen Lindström, Håkan Karlsson
    2005 Volume 59 Issue 3 Pages 380-385
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.380
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    New technology admits new and more frequent measurements of pulp quality. Södra Cell, the leading market pulp producer in Europe, has on-line measurements of fiber properties installed in all production lines in the four Scandinavian mills for production of bleached chemical pulp. The main purposes for the installations were to secure the quality delivered to the customers by more frequent tests of quality by measuring fiber properties. The system is used for quality optimization of wood supply and process as well as control of transitions in the pulp mill.
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  • Totally Integrated Automation System for Paper Making Plant
    Nobuyuki Yokoo
    2005 Volume 59 Issue 3 Pages 386-391
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.386
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    The TIA shows that Totally Integrated Automation includes all the components of an automation system : Controllers, HMI systems, process control systems, distributed I/O, drives (the SIMOTION Motion Control System is a new addition here), sensors and actuators, integrated communication links, and software.
    TIA thus enables the solution of all automation tasks in manufacturing and process control. The integration of the process control systems makes it possible to automate upstream, mainstream and downstream with components of the same system.
    This results in savings from engineering to maintenance. Plant flexibility is increased by the high level of integration, and savings can be achieved in spare parts management.
    MES applications of the SIMATIC IT Framework are used for process optimization and allow connection to the plant control level with procedures for order processing.
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  • B/M System 7 SP
    —Introduction of Lifecycle Solutions for B/M System—
    Akira Takikawa, Minoru Yoshifusa
    2005 Volume 59 Issue 3 Pages 392-396
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.392
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    Currently Yokogawa B/M system has 7 models and about 600 systems are in operation. Half of them have been operated for more than 10 years and the one third have been operated for even more than 15 years.
    Under such circumstances, there are a couple of tasks for customers to be solved as follows :
    (1) Deterioration of reliability due to aging system and increase of maintenance cost
    (2) B/M system upgrading requirement compiling to quality and production improvement by using sophisticated production management system.
    Yokogawa released “7 SP (Lifecycle Solution Program)” for DCS (Distributed Control system) in April, 2004. A main focal point is to set optimum service solutions for system lifecycle divided into 3 stages for equipment of Introduction Support Phase, Operation Support Phase and Migration Support phase as “7 Service Innovations”.
    In this article, 2 problem-solving examples are introduced as lifecycle solutions only for B/M system.
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  • New Developed Porosity Sensor to be Applied to The Coating Technology
    Reijiro Nakano
    2005 Volume 59 Issue 3 Pages 397-402
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.397
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    Porosity is an extremely important property for almost all paper types and grades. It plays a crucial role in the production of papers for sacks, filters and cigarette wrappers, where air permeability is an essential characteristic. In addition, correct porosity is a key factor in paper printability. Paper porosity has been measured for a long time, but until now, measuring porosity CD profiles in real-time has been impossible. The fixed position online porosity measurement system has been used for several years. In some cases paper mills have measured porosity profiles from samples with manual testing equipment or by means of automated paper testing systems.
    Honeywell's new Porosity Sensor is the first online profiling measurement sensor that offers the capability to control the porosity MD and CD profiles. This means it is possible to have more uniform paper quality, and tools to better meet the quality expectations of customers. Papermakers have knowledge and experience about factors affecting the air permeability profile. The same CD profiling units that affect other profiles also affect the air permeability profile : water removal elements, the press section nip pressure, the run model of the steam box, the condition of the paper machine fabrics, the drying shrinkage profile, and calendering are known to affect the porosity profile.
    The scanning porosity measurement improves control over the grinding phase, the wet end chemical dosage, the wire section vacuum, and the calender. Optimal porosity also improves the coating result and reduces consumable coating agent volumes. Furthermore, improved paper machine control shortens grade change times, thus minimizing related downtimes and waste.
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  • Hardness Measuring Instrument for Paper Roll “RPQ”
    —Hardness Profile Appears Immediately with Continuous Measuring—
    Mitsuhiko Matsuda
    2005 Volume 59 Issue 3 Pages 403-408
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.403
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    Uniformity of hardness of paper roll is one of important quality control indexes in the paper production. So far there have been two popular methods of checking the paper role hardness ; one is to hit the roll surface with a stick and to listen sound with ears-Hit and Listen Method-, and another is to measure hardness with Schmidt Hammer-SCHMIDT Hammer Method-.
    The Hit and listen method relies completely on personnel skill and its numerical analysis is impossible. Even the Schmidt-hammer Method is also dependable on personnel skill and experience, because accurate measurement with Schmidt Hammer is not so easy and simple work. Measurement and analysis with Schmidt Hammer Method is rather time-consuming.
    “Role Quality Profiler”, “RQP” for short, has been now launched from TAPIO Technologies OY in Finland for most effective measurement of the paper roll hardness. The features of the RQP are continuous measurement, immediate profile display, and accurate results independent on personnel skill.
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  • A Report on the 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants
    Gyosuke Meshitsuka, Takuya Kitaoka
    2005 Volume 59 Issue 3 Pages 409-416
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.409
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    The 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants was held in Nanjing, China on October 13-14, 2004 under the co-organization of Nanjing Forestry University and Graduate School of Agricultural and Life Sciences, The University of Tokyo. Total participants were 156 including 38 from outside of China, and 133 papers (44 oral and 89 poster) were presented.
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Technical Report (Original Paper)
  • Retention Control System in a Paper Machine Accompanied by The Decoupling Controller
    Yoshitatsu Mori, Naoki Imai, Yoshinobu Hara, Michiaki Nishimura, Shiro ...
    2005 Volume 59 Issue 3 Pages 418-426
    Published: 2005
    Released on J-STAGE: August 25, 2006
    DOIhttps://doi.org/10.2524/jtappij.59.418
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    We introduced a retention control system for the wet-end section of a paper machine using two intelligent pulp and filler (ash) low consistency sensors. When we tried to control the white water (WW) total consistency by the retention aid dosage using the “Proportional plus Integral (PI) feedback controller”, we experienced a strong interaction with the existing paper ash content control of the QCS (Quality Control System). To alleviate this interaction problem, we utilized a “decoupling controller” together with the “PI feedback controller”.
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Pulp and Paper Mills in Japan (44)
Coffee break
Papyrus
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