2005N3@pZ

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The Latest Elevator Control Technologies

Shiro Hikita
Mitsubishi Electric Corporation, Inazawa Works

@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 gSigma AI-2200h as a product example.


The Basics, the Application and Great Possibilities of IC Tags

Hiroshi Ohtsuka
OMRON Corporation

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 2nd 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.


The Reduction Strategies of Construction Term and Cost in DCS Renewal

Yasuo Kobayashi
Niigata Mill, Hokuetsu Paper Industries Co., Ltd.

@It has been over 20 years since the first DCS was installed for process control. Hokuetsu Paper Mills LTD. Niigata mill renewed two superannuated DCS. Although the model of the both DCS were the same, the used updating methods were different. This report deals with outline of reduction strategies in construction term and renewal cost at two examples of DCS renewal.


DCS Renewal at Kishu Mill

Yuji Yamanaka
Kishu Mill, Kishu Paper Co., Ltd.

Kishu Mill introduces DCS into pulp process, power process, and paper-making process, etc., and is performing operation by CRT operation. After the introduction of DCS into the Kishu Mill, about 20 years have passed. The system has been updated by the reconstruction of a plant, the problem on maintenance, etc. The updating example of DCS in pulp process is reported this time.


A New Enhanced System for Plant Maintenance Program

Susumu Ohsawa
Nippon Paper Industries Co., Ltd., Technical & Engineering Div.

A new enhanced system for plant maintenance program has been developed in Yatsushiro@Mill in order to improve production efficiency and equipment condition. It should be expected the excellent tool using computers for carrying out the PDCA plant maintenance cycle and getting the best result within the limits of the budget. With this program, we can exactly reduce equipment breakdown and maintenance cost, and increase work efficiency. This paper outlines the feature and the process of developing the new plant maintenance system.


The Report on Process Control and Equipment Life

Process Control and Automation Committee, JAPAN TAPPI

Recently the replacing of process control system could not be proceeded. We collected the questionnaire data from the supplier of instrumentation and the user in pulp and paper industry about the life cycle of process control system. On this time we report the result of our investigation.


Optimizing the Pulping Process by Using a New On-Line Analyser and Experiences from Pulp Mills

Jorgen Lindstrom
Research Engineer, Sodra Cell R&D
Hakan Karlsson
Product Manager, Lorentzen and Wettre AB

New technology admits new and more frequent measurements of pulp quality. Sodra 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.


Totally Integrated Automation System for Paper Making Plant

Nobuyuki Yokoo
Yaskawa Siemens Automation & Drives Corp., System Design Group

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.


B/M System 7SP - Introduction of Lifecycle Solutions for B/M System -

Akira Takikawa
Lifecycle Solutions Sales Div., Yokogawa Electric Corporation
Minoru Yoshifusa
Lifecycle Solutions Service Center, Yokogawa Electric Corporation

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 g7SP (Lifecycle Solution Program)h 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 gf7 Service Innovationsh.
In this article, 2 problem-solving examples are introduced as lifecycle solutions only for B/M system.


New Developed Porosity Sensor to be Applied to the Coating Technology

Nakano, Reijiro
Sales Development Dept., Honeywell K.K.

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.


Hardness Measuring Instrument for Paper Roll gRPQh
@ - Hardness Profile Appears Immediately with Continuous Measuring -

Mitsuhiko Matsuda
Nomura Shoji Co., Ltd.

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.
gRole Quality Profilerh, gPQPh 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.


A Report on the 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants

Gyosuke Meshitsuka
The University of Tokyo
Takuya Kitaoka
Kyushu University

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 Science, The University of Tokyo. Total participants was 156 including 38 from outside of China and 133 papers (44 oral and 89 poster) were presented.


Retention Control System in a Paper Machine Accompanied by the Decoupling Controller

Yoshitatsu Mori
Pulp and Paper Research Laboratory, Oji Paper Co., Ltd.
Naoki Imai
Technology Division, Oji Paper Co., Ltd.
Yoshinobu Hara, Michiaki Niahimura and Shirou Hirano
Kure Mill, Oji Paper Co., Ltd.

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 gProportional plus Integral (PI) feedback controllerh, 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 gdecoupling controllerh together with the gPI feedback controllerh.

Keywords: paper machine, wet-end section, retention control, interaction, PI control (proportional plus integral control), decoupling control