2002 Mar JAPAN TAPPI JOURNAL

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JAPAN TAPPI JOURNALVol. 56, No. 3

March 2002 Abstracts


The Automatic Train Operation Equipment with Expert System
Masahiko Mitsukawa
TDTSC,Mitsubishi Electric Corporation

 Recently, the subway which required one-man operation has come to be constructed.
 In the Automatic Train Operation system, it is important to operate the train accurately. But the improvement of riding comfort and the energy saving are attached to importance compared with before.
 To achieve more highly developed operation ,and to satisfy such a demand, we apply the expert system to the Automatic Train Operation system.
 In this discourse, Automatic train Operation Equipment with Expert system is described.


The Latest Report of Non-manufacturing Robots
Shoichi Hamada
Manufacturing Science and Technology Center, Chief Research Scientist HRP Department

 MSTC (Manufacturing Science and Technology Center) is engaged in the following project that aims to develop the two types of robots for non-manufacturing:
 (1) A robot system for supporting at the nuclear disaster
This robot system was developed on the occasion of the JCO accident to execute countermeasures against calamities in place of people by means of remote control. This system consists of two "monitoring/surveying robots" that observe the situation of a disaster and work, three "light/medium/heavy work robots" that execute counter- measures at a disaster, one "heavy weight carrier robot", and the each remote control device. It is designed to make each robot collaborate on work under the critical situation such as the narrow space in nuclear facilities in addition to the high level radiation at the stricken area.
 It is desirable that nuclear disasters will never occur, however, people would be relieved if such kind of robots hurry to the scene of the accident.
 (2) Development of a human-friendly humanoid robot
This project is to research how the biped robot system work in the actual scene. For two years since 1998, the base research called "platform" (the main body of a robot and its remote control device) had been developed. A three-year research plan to apply its work started in the 2000 fiscal year.
 The main body of the robot was based on and revised a humanoid robot made by Honda (P3). Its remote control device was developed to operate with high presence as if a person were inside of a robot. Five kinds of application of this robot are chosen to be developed for carrying out dangerous work or what robots can do instead of men: "Plant Facility Maintenance", "Care Service", "Operating Industrial Vehicles", "Management of Buildings and Homes" and "Cooperative Outside Work".
 All of people concerned are tackling the development to realize a dream-like humanoid robot that can cooperate and coexist with human beings.


Use Experience of a Microwave Based Consistency Transmitter
Tetsuya Mochizuki
Honsha Mill , Yoshinaga Div. , Daishowa Paper Mfg. Co., Ltd.
 This paper introduces the operation experiences of a microwave based consistency transmitter in the recycle board plant in Daishowa Yoshinaga mill.
 The microwave based consistency transmitter has an advantage in the coarse screening line because of having no projection. This time, we verified the accuracy and the sensitivity compared with the existing rotating type transmitter.


Result for The Testing Regarding Pulp Consistency Meter
Katsuya Kawata
Process Control and Automation Committee,JAPAN TAPPI
Oji Engineering Co., Lt.

 There are so many Pulp consistency meter for Pulp and Paper Industries.The type of them are "rotary blade","blade","microwave","optical".We tested those 6-types of consistency mater that are installed on the pipe line under the same conditions.
 We used 3-types of pulp for this test(NUKP,LBKP and DIP).And this tests were such as "measurement for consistency change","measurement for flow velocity change","measurement for pressure change","measurement for clay add".You will find the result for the above tests.


Application of Quality Control Measuring Instruments in High DIP Use
Susumu Ohsawa
Nippon Paper Industries Co.,Ltd.Kushiro Mill

 Quality control of the deinked pulp, DIP plant has recently become more important than before as recycled pulp use grows higher. Although ash content and residual ink are also important factors in addition to brightness among some quality indexes of DIP, it is hard to measure those exactly and we have had no good measuring instruments until now. In this paper we describe successful results of newly installed retention meter RMi and brightness meter CORMEC, KAJAANI in the various DIP process lines.


Experience of a New Grade Change Control System
Shunji Matsushita
Oji Engineering Co.,Ltd Yonago Division

 We have applied a new grade change control to 1 M/C in Yonago mill. It was originally developed by Oji paper and Yokogawa Electric Corporation added some improvement to it. In this paper, we explain the difference between the new grade change control and the old one and the effect of the new control referring to the process of the improvement.
 Besides, we also adopted the new caliper CD control and we report the control method and effect of it.


FOUNDATION Fieldbus-Present Condition and Issues
Kazuhiko Matsumoto
Fushiki Mill Nippon Paper Industries Co.,Ltd

 FOUNDATION Fieldbus was announced as "one of the greatest technological innovation to the next generation". In Japan, FOUNDATION Fieldbus Association was established in 1994, and standard application products have been released since 1996.
 Numbers of industrial plants using the Fieldbus system started their operation in 1999, and also in Fushiki Mill, since "N-DIP modernize construction" had been authorized in October 2000, we started to investigate the system. The investigation was on these three points: 1.Flexibility to extended industrial plants(=high leveled adaptation), 2.Product repletion(=PID control function built in Fieldbus products), 3.Integereation with DCS system(=possibility through engineering from DCS system). Then, technical training, designing, engineering, field test, and all kinds of simulation had been enforced, and finally we have succeeded to operate the system in April 15th 2001. Now, I would like to report the present condition and issues of "New Fieldbus System".


Development of the Fault Report System
Kazushi Nishiyama
Mitsubishi Paper Mills, Ltd

 The Fault Report System was developed and introduced into the No.5 coater of the Hachinohe Mill in 1999. This system provides three useful tools. First tool is for making a matrix-type fault report from present fault data and second one is for making a similar report from previous fault data. Third tool is for analyzing fault data. Here we describe the purpose of introduction and the function of this system.


The Actual Results of Smart Valve Controller (ND800)
Yutaka Yokoyama
Oji Paper Co., Ltd.

 A control valve is important device in operation. However, we could judge whether a valve was normal only by the result of the process value.
 The automatic diagnostics system of the control valve by Intelligent Positioner was introduced in Matsumoto mill.
 As for preventing the sudden trouble of the valve, of course we are expecting the reduction of the total cost in such cases as the reduction of the maintenance cost.


Consideration of the Latest Technology for Drive Control
Michio Kawamura
Yaskawa Siemens Automation & Drives Corp.

 Recently, the application area of the variable speed drives for the paper making plants are expanding and methods of application are changing due to the rapid progress of inverter and servo technology.
 On the other hand, the requirements toward the environment, such as correspondence to the low noise, the decrease of the electromagnetic noise, repression of the harmonic electrical current, become severe.
 As consideration of the latest technology for drive controls of Yaskawa Siemens Automation & Drives Corp., technology of synchronous drive with MASTERDRIVES MC, technology of 3-level PWM control for environment harmonic control with VARISPEED G7 are mainly described in this papers. HOLLOW SHAFT AC SERVO DRIVES and inverter mounted SIMODRIVE POSMO A DRIVES are briefly explained as advanced drive technology.


Remote Type Smart Positioner to Offer Solution in the field− Smart Valve Positioner Remote Type AVP3000 Alphaplus −
Minoru Fukuda
Valve & Measurement Marketing Department,Yamatake Industrial Systems Co.,Ltd

 Valve positioner in process control is required high reliability and the durability. Because that the operation gives direct influence in a process and the control valve itself being put with severe environment condition. The Spread of Smart Positioner(Valve positioner which carried a microprocessor in electro-pneumatic positioner) was hard compared with Transmitter and Electro-magnetic flow meter. Recentry Smart Positioner becomes use much as a result of having acquired an experience, and Smart of Control valve progresses.
 This report is introduces technology and feature of Remote type AVP3000 Alphaplus which was developed in order to solve a problem in the field.


Test Methods of ISO Brightness and Color
Yoshio Yoshida
Material Analysis Center, R & D Div., Oji Paper Co., Ltd.
Pulp and Paper Testing Committee, JAPAN TAPPI

 Currently, there are two methods of brightness determination in JIS. One is JIS P 8123 (Testing method for brightness by Hunter of paper and pulp) and one is JIS P 8148 (Paper, board and pulps−measurement of diffuse blue reflectance factor (ISO brightness)). JIS P 8123 was commonly used in Japan but was not popular in the world. In order to globalize the standard, JIS P 8148:1993 was prepared based on ISO 2470:1977 and revised at 2001 to adapt ISO 2470:1999. It is important to popularize this method in the Japanese pulp and paper industry.
 There is no method of color determination in P sector of JIS. At present, ISO 5631 (Paper and board−Determination of colour (C/2°)−Diffuse reflectance method) is under translation to JIS by JAPAN TAPPI.
 In this paper, the outline of JIS P 8148:2001 the determination of ISO brightness and ISO 5631 the determination of color are described.


Development of Super Water-absorbent from Cellulosic Materials (3)-Improvement of water absorbency-
Yuehua Xiao and Gyosuke Meshitsuka
Laboratory of Wood Chemistry, Department of Biomaterial Sciences,Graduate School of Agricultural and Life Sciences, The University of Tokyo

 Water absorbents were prepared from bleached hardwood kraft pulp by carboxymethylation (CM-LBKP) and cross-linking with polyethylene glycol diglycidyl ether having different chain length by two stages method. Water retention value reached up to as high as 670 g/g for deionized water, and 64 g/g for 0.9% saline solution (physiological saline). Higher D.S. of carboxymethyl group of LBKP was advantageous for a higher water retention value, when D.S ? 1.42. Water retention value of cross-linked CM-LBKP decreased with the increase of the amount of bound cross-linking agent.

Key words: cellulose, carboxymethyl cellulose, super water-absorbent, cross-linking, water retention value.