著者
山本 卓
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.75, no.10, pp.1183-1188, 2009-10-05 (Released:2011-02-07)
参考文献数
10
被引用文献数
1 or 0
著者
三谷 純 鈴木 宏正
出版者
公益社団法人 精密工学会
巻号頁・発行日
pp.9-9, 2003-03-26 (Released:2005-03-01)

本稿では180度に開いたときに立体形状が立ち上がる「折り紙建築」の設計を計算機で支援する手法を提案する。紙に切り込みを入れ、互いに格子状に組み合わせて作成した立体は平面へ折り畳めることを利用し、対象とする3Dデータを元に180度型折り紙建築の展開図と配置図を生成する。切り込みの生成時にはパーツが抜け落ちないようにする方法も提案する。本手法を計算機上に実装し、実際に工作を行ってその有効性を確認した。
著者
寺田 英嗣 今瀬 憲司
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.75, no.12, pp.1418-1422, 2009-12-05 (Released:2011-02-07)
参考文献数
8

The motion of a two stage type Cycloid Ball Reducer is analyzed. The fundamental reduced element of this reducer consists of three components; two surface grooved discs and a train of balls. One of the discs has an epi-trochoidal wave groove on one side surface while other disc has a hypo-trochoidal wave grooves. These grooves are just like a grooved cam mechanism. Also, they are arranged face-to-face with each other, and balls are located which transmit the torque between these discs. Especially, to eliminate the eccentric excitation which is caused by eccentric motion, this newly proposed mechanism has the special transmitting element which locates between the fundamental reduced elements. In this paper, the motion principle is analyzed using the polar complex vectors analysis. Also the design parameters are investigated. It is proved that the proposed reducer has a constant velocity rotation characteristic in motion principle. Then using the prototype reducer, the positioning accuracy and the backlash characteristic have been verified.
著者
山本 晃 賀勢 晋司
出版者
公益社団法人 精密工学会
雑誌
精密機械 (ISSN:03743543)
巻号頁・発行日
vol.43, no.508, pp.470-475, 1977-04-05 (Released:2009-07-23)
参考文献数
1
被引用文献数
6 or 0

This paper presents a solution for self-loosening mechanism of bolt-nut joints under transverse vibration. At the first stage of relative transverse displacement between fastened plates, a bolt-thread inclines in a mating nut-thread with slip on the screw-surface of the nut-thread, producing elastic torsion of the bolt-shank. At the next stage of the transverse displacement, the washer face of the nut slips on the surface of the vibrating plate, accompanying loosening rotation of the nut caused by spring back of the elastic torsion of the bolt-shank. Repetition of these behaviours in each cycle of the vibration, advances the self-loosening of the bolt-nut joint. Above mentioned self-loosening mechanism is analyzed theoretically, considering loci of slip on the screw surface and washer face. The theory is compared with the experiment, resulting that they show fairly good agreement, except small difference which is seemed to be caused by the fluctuation of the frictional coefficients on the screw surface and the washer face.
著者
中田 孝
出版者
公益社団法人 精密工学会
雑誌
精密機械 (ISSN:03743543)
巻号頁・発行日
vol.29, no.336, pp.1-11, 1963-01-05 (Released:2009-06-30)
参考文献数
10
著者
牧野 洋
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.60, no.1, pp.80-85, 1994-01-05 (Released:2009-06-30)
参考文献数
5
被引用文献数
2 or 0

The Clothoid is a curve which has linearly changing curvature in relation to the length of the curve. By choosing the curve as the interpolating curve between freely given 2-dimensional point series, we can obtain a smooth free curve. In this report a practical method of Clothoidal interpolation, called "tangent method", is mentioned. The algorithm of the method is derived and some examples are shown.
著者
松本 弘一
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.80, no.7, pp.630-633, 2014-07-05 (Released:2014-07-05)
参考文献数
11
著者
新井 泰彦 竹川 徹 平井 宏之 横関 俊介
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.75, no.11, pp.1323-1328, 2009

The speckle interferometer based on multi camera technology using two cameras is applied to a dynamic measurement in this paper. A phenomenon that the package of an electronic device is deformed while running is investigated by the novel technique. To perform high precise measurement by this method, the optimum conditions for measurements are also discussed concerning the size of speckle and the frequency of carrier signal. The deformation process of the object can be analyzed high-resolution. Under the optimum conditions, the deformation process of the package during the operation of an operational amplifier is measured. Then, the local maximum deformation can be estimated as 150nm from experimental results. From the results, it can be also confirmed that electronic devices are deformed by the stress of a heat by an operation every second during the operating time.
著者
熊本 博光 西原 修 平岡 敏洋
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.68, no.5, pp.681-686, 2002-05-05 (Released:2009-04-10)
参考文献数
6
被引用文献数
1 or 0

This paper considers salt water fishing tackles consisting of line, hook, bar float, primary sinker and secondary sinkers. The line with the sinkers and the hook are modeled by a multilink system connected with the float. A new algorithm is proposed to calculate acceleration terms satisfying Newtonian kinematical equations. The computational requirement varies only linearly with the number of links because the algorithm is based on a sweep-out operation on a threefold diagonal matrix with a simple structure. A comparison is made with a well-known Featherstone algorithm that is based on articulated body inertias. Animation results with 22 links subjected to tidal flow and wave produce typical tackle behaviors consistent with expert experience. The animation is useful for design of tackles and discrimination drills of fish hits.
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.81, no.1, pp.39-44, 2015-01-05 (Released:2015-01-05)
著者
上瀧 剛 矢田 晃嗣郎 内村 圭一
出版者
公益社団法人 精密工学会
雑誌
精密工学会誌 (ISSN:09120289)
巻号頁・発行日
vol.79, no.11, pp.1019-1024, 2013

Scale-space image theory, in which a Gaussian filter with set scale parameters is used to generate a series of blurred images, has become the basic technique of computer vision. We have proposed to apply a spectral theory to compress the scale space and demonstrated some applications such as blur image generation and SIFT. In this paper, as another application of spectral theory, we propose template matching method for blurred image. A basic idea of the proposed method is changing the scale parameter of the template to fit the input blurred image. Our experimental results show that the proposed method detects the XY position and scale of the target object accurately.
著者
鈴木 宏正 原 雄司 瀬戸 康史 森田 修史
出版者
公益社団法人 精密工学会
雑誌
精密工学会学術講演会講演論文集
巻号頁・発行日
vol.2010, pp.161-162, 2010

本研究では,プラスチック製品の加飾法の一つである革シボについて,そのデザインから加工をコンピュータで支援する方法について検討している.本発表では,現状技術のレベルを見るためのフィージビリティースタディーを行ったので,それについて報告する.ここでは,シボの凹凸データを合成し,高品質表示を行い,さらには金型の直彫り加工によって試作品を作成した.