来たるべき情報化社会においては, 人間と機械, すなわち人間と計算機との直接的なコミュニケーションが必須であり, そのときまでに文字, 音声, 図形の原始情報の計算機による直接認識 (パターン認識) の技術が充分確立されていなければならない. 本報告では, このような観点から文字, 図形 (音声は除く) の認識問題を中心に開発の現状, ならびに問題点をサーベイするとともに, 計算機の図形入出力装置であるグラフィックディスプレイについて言及する.

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My views on recent trends in the strategy and practice of Japan's robotics research are briefly introduced. To meet ever-increasing public expectations, robotics researchers and engineers have to be more seriously concerned about robots' intrinsic weaknesses. Examples of these are power-related and reliability issues. Resolving these issues will increase the feasibility of creating successful new industry, and the likelihood of robotics becoming a key technology for providing a safe and stress-free society in the future.

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This paper concerns a method of reducing noise level in a mail processing machine at low cost. A stack part of the mail processing machine is one of the main noise sources. This is because an installation area of the stack part is large and is widely open so as to take out mails, that a noise is emitted towards an operator. The purpose of this study is to propose a method to reduce a noise level of a stack part at low cost as an alternative for sound-absorption material. A broadband noise is generated from a mail processing machine as various kinds of mails are conveyed. Also, information such as installation environment and housing size is usually not provided at the design stage. So, we need a method of reducing noise level to derive a design parameter from a certain range of prediction. Based on the characteristics of a stack part of a mail processing machine, we examined a method using a back opening of a stack part to reduce noise that is amplified by internal resonance. The reduction of the sound at the front evaluation point is examined by a model with a front and a back opening which has a trade-off between decreasing internal sound and increasing diffracted sound. The fact that a sound pressure level at the front evaluation point reduced with a back opening was confirmed by using experimental equipment. We have applied this approach to mail processing machine, and experimental value roughly corresponded to calculated value. The reducing noise level of a slit-like back opening was -3dB with white noise, and it had the same effect as a sound-absorption material. We have proposed a low cost noise reducing method as substitute for a sound-absorption material that can be used at a design stage.

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In this paper, as a basic study on behavior of sandwich-belts conveyor, experiments using prototype sandwich-belts conveyor are carried out. It is found that a large slip between the driving belt and driven belt and driven belt occurs even there is no torque loaded. A theoretical analysis is derived to explain the slip under zero-load and the analysis shows that bending of belt cause the slip-a bending slip.

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In the paper feeding mechanism, it is important to feed the sheet paper without jamming under any conditions. To avoid sheet jamming, we need to control the paper flutter in the paper path. We proposed a concave carrying path under the feeding roller. This mechanical characteristic is achieved by controlling paper behavior at two edges of concave carrying path and feeding roller, so it can generate tension of paper under the feeding roller, and keeps the paper feeding path constant. We also investigated which mechanical parts have an effect on paper jam by using robust design method, and we made clear it is the most significant to change cross sectional area of the paper feeding mechanism.

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This paper deals with a three dimensional flutter analysis and wind-tunnel experiment of a cantilevered rectangular sheet between two side walls subjected to axial fluid flow. The influence of the gap ratio and aspect ratio on the flutter velocity and frequency are clarified. The unsteady fluid force acting on the sheet surface is calculated by using Doublet-point method, which is based on unsteady lifting surface theory. Then, the effect of side walls is added utilizing the mirror-image method. The local work done by the fluid force acting on the sheet surface is determined analytically.

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