| JaLCDOI | 10.18926/19618 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_59.pdf |
| Author | Fujihara Yutaka| Osaki, Hirokazu| |
| Abstract | In this paper, we propose a method to solve simultaneously facility layout problem and scheduling problem. About a initial random layout planning, the production scheduling and the transportation scheduling of AGV are obtained by using priority rules. From the obtained transportation scheduling, the critical transportation and the closeness rating are obtained. Facility layout is renewed by the combined procedure of genetic algorithm and tabu search in order to reduce the material handling cost. By using this renewed facility layout, the production scheduling and the transportation scheduling of AGV are also revised until no further improvement is possible. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 59 |
| End Page | 64 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308989 |
| JaLCDOI | 10.18926/19616 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_53.pdf |
| Author | Li Sen| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yosiomi| |
| Abstract | A method for designing a monitoring system with multiple cameras is proposed in order to supervise and recognize the progress of wide work area. First, a wide view camera is deveeloped by combining several usual cameras so that its visual angle could cover more than π/2. Secondly, A method for determining the number and location points of cameras is proposed by considering the shape of monitored area and the installation cost of cameras. The monitored area is divided into three kinds of basic shape (rectangular form, L form and convex form). For every basic shape area, the camera is located at the vertex pasition, so that the whole area can be monitored by the camera. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 57 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309122 |
| JaLCDOI | 10.18926/19615 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_47.pdf |
| Author | Jindai, Mitsuru| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yosiomi| |
| Abstract | In this paper, we propose the recognition methods by image processing using 2D or 3D CAD. In the case of 2D CAD, an object is recognized by comparing five characters calculated from the center of gravity and contour. In the case of 3D CAD, there are two recognition methods. Firstly 3D CAD figure is transformed into 2D CAD figures. And an object is recognized by comparing 2D CAD figures with inputted images. Secondly the three dimensional coordinates of vertexes on an object are calculated from the images taken from some cameras and compared 3D coordinates with those of 3D CAD figures and recognized the sort of an object. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 47 |
| End Page | 52 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309202 |
| JaLCDOI | 10.18926/19612 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_39.pdf |
| Author | Munesawa, Yoshiomi| Osaki, Hirokazu| Kajihara, Yasuhiro| |
| Abstract | In this paper, we propose a recognition index to evaluate the complexity of discrimination among parts and units. The parts and units are classified into some groups (the number of groups is shown as n) by one characteristic, such as color, shape, size and so on. The recognition index of each is denoted as log(2) (n+1) by the information quantity formula. The recognition diagram shows the classfication of parts and units into only one part and unit by the structure of a characteristic. Further we propose the line balancing method for assembly line based on the working time and recognition index. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 39 |
| End Page | 45 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309042 |
| JaLCDOI | 10.18926/19610 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_31.pdf |
| Author | Iwamoto Hidehisa| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yoshiomi| Hashimoto Atsufumi| Seki, Shuji| |
| Abstract | The nurse supporting robot system to prepare and hand surgical instruments to a surgeon is proposed to reduce work of nurse in a surgical operation. In this paper, the surgical instrument recognition system (SIRS) is developed to hand the surgical instruments to a surgeon by the robot. The characteristics ot the instruments are area of the instruments, ratio of minimum center-contour distance to maximum one and its outline contour, are recognized by using the image processing. Kinds of the instruments are distinguished by these characteristics. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 37 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309084 |
| JaLCDOI | 10.18926/19608 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_19.pdf |
| Author | Washio, Seiichi| Takahashi, Satoshi| Imoto, Chikashi| Yoshida, Atsumasa| |
| Abstract | The present paper deals with measurements of the diffusion coefficients as well as the saturated solubilities of single component gases such as N(2), O(2) and CO(2) to a mineral oil. The method to determine the diffusivity is based upon measuring the pressure changes caused by the one-dimensional diffusion between the gas and the oil enclosed in an airtight container. For N(2) and O(2) the profiles of the measured pressure changes agree well with those predicted by diffusion theory, whereas that is not the case with CO(2). Although the reason why CO(2) does not seem to obey diffusion theory has yet to be studied, it may suggest the possibility that the diffusion coefficient varies with the pressure, considering that the range of pressure change in the diffusivity measurement was much obtained by this method fell within ±30% around the average. Moreover the solubility measurements have made clear that Henry's law holds true between the three pure gases and the oils tested, and that O(2) and CO(2) dissolve into the oil approximately two and ten times more, respectively, than N(2). |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 19 |
| End Page | 30 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309030 |
| JaLCDOI | 10.18926/19606 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_5.pdf |
| Author | Abe, Takeji| Namikoshi Ryuji| Nagayama Noriyuki| Takano Yasuju| |
| Abstract | The influence of the slip between the inclusion and the matrix during the plastic deformation of inhomogeneous material with elliptic inclusions is investigated. The material is assumed to be rigid-plastic. The boundary slip region is modeled by assuming lower yield stress for the thin boundary region than those of the inclusion and the matrix. The rigid-plastic finite element method is used for the numerical calculation under the plane strain condition. The effects of the aspect ratio of the inclusion, the yield stress of the boundary region, and the volume fraction of the inclusion on the deformation mode are studied. The patterns of the strain concentration and the averaged flow stress of the inhomogeneous material are also discussed. The results may be helpful for understanding creep or superplastic deformation of metals with inclusions. |
| Keywords | Plasticity Composite Material Sliding Inclusions Rigid-Plastic Deformation Finite Element Method |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 5 |
| End Page | 17 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309204 |
| JaLCDOI | 10.18926/19604 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_1.pdf |
| Author | Sakakibara, Akira| Kanadani, Teruto| |
| Abstract | Aging of diolute Al-Ag alloys after quenching from low temperatures were studied mainly by electrical resistometry. Maximum resistivity observed in the aging curve of specimens quenched from high temeperature disappeared when the quenching temperature was lowered to 473 or 453K. When the quenching temperature was lowered further to 423K or lower, however, maximum resistivity reappeared. At the temperature lower than or equal to 423K but higher than the GP zone solvus, the alloys were not homogeneous but had clusters of solute atoms or fluctuation of solute concentration. Inhomogeneous distribution of solute atoms may affect the aging behavior after quenching from that temperature. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 4 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309092 |
