著者

小林 賢一 山崎 徹 今福 健一 塩川 克久 伊東 圭昌 名倉 英紀 石上 さやか 中山 舞美

出版者

一般社団法人日本機械学会

雑誌

機械力学・計測制御講演論文集 (ISSN:13480235)

巻号頁・発行日

vol.2013, pp."509-1"-"509-11", 2013-08-25

---

Most robot craft construction courses held by regional administrative organs are temporary events, so that it is very difficult to communicate between participants only in the event day. The purpose of our project is to construct the partnership among our small collaborations, such as small collaboration between NPO NPO-RIC and Kanagawa Univ, between Kanagawa Univ. and the after school daycare facility "Okaeri", and between Kanagawa Univ. and Trans Cosmos Ltd., and so on. In this paper, not only the robot craft construction course but also the process of collaboration among our organization with each different output are reported.

著者

廖 于靖 サブチェンコ マリア 萩原 一郎

出版者

一般社団法人日本機械学会

雑誌

機械力学・計測制御講演論文集 (ISSN:13480235)

巻号頁・発行日

vol.2014, pp."530-1"-"530-8", 2014-08-25

---

In this paper we present a new approach in progress for generating the 3D surface mesh from a single image based on the cross-sectional approach. Moreover, the extraction of the contour of the input image and skeleton calculation have been proceed as the "Skeleton-Diagram" feature for generating the 3D surface mesh. The process employs the methods based on the image and geometrical processing. Finally, the application results show ability and prospect of the proposed method.

著者

長松 昌男 岩原 光男 御法川 学 曽我 明央

出版者

一般社団法人日本機械学会

雑誌

機械力学・計測制御講演論文集 (ISSN:13480235)

巻号頁・発行日

vol.2013, pp."253-1"-"253-7", 2013-08-25

---

We have developed a converted noise localization method, Converted Nearfield Acoustic Holography (NAH) method. This method can measure high frequency noise source with short measurement time. However, this method has some deterioration in the reconstructed images. In this paper, the experiments results of measurements for an engine are explained. As a result, it is verified that the proposing method can measure high frequency noise of engines quickly.

著者

伊藤 直輝 中村 弘毅 山崎 徹

出版者

一般社団法人日本機械学会

雑誌

機械力学・計測制御講演論文集 (ISSN:13480235)

巻号頁・発行日

vol.2015, pp."528-1"-"528-10", 2015-08-25

---

An electric guitar is composed of a wooden body, a wooden neck, 6 steal strings and other electric parts including an electromagnetic pickup. An electric guitar convert string vibration into electric signal through a pickup, and the sound is emitted with an amplifier, or a speaker. Usually, high density and high stiffness wood is used for body material to sustain string vibration longer and the sound remains. Also, it is reported that the material of a body influences the quality of the sound. Nonetheless, there are few studies focused on detail of vibration propagation between string vibration and sound. Authors have studied on the structure of traditional instruments to clarify the vibration characteristics especially from the aspect of vibration energy propagation model in recent years. Specifically, the vibration propagation characteristics of several instruments have been evaluated using SEA: the bridge structure and the sound post of violin, and soundboard of a piano. It is expected that SEA may also help understanding sound emitting process of a guitar. In this study, vibration energy propagation of two test guitars composed of different body material are observed with experimental SEA, to evaluate the influence of body material on the guitar sound. As a result, it has represented the difference between the guitar in the vibration propagation characteristics between the neck and body. The guitar which the Young's modulus of body materials has a big has a big sound pressure level. There is a strong correlation in the frequency characteristic of input power and sound pressure level.

著者

柿森 亮昌 錦戸 亮太 勝 隆志 井上 喜雄 芝田 京子 王 碩玉

出版者

一般社団法人日本機械学会

雑誌

機械力学・計測制御講演論文集 (ISSN:13480235)

巻号頁・発行日

vol.2014, pp."130-1"-"130-7", 2014-08-25

---

The aim of this study is to improve of stick picture using wearable motion sensor, in order to estimate human joint center and stride. Human joint center was estimated by least square method of sphere and marker points on the human arm were observed by motion analysis system (MAC3D System). First, as a basic experiment, instead of measuring human joint, we made use of a stick which has 490 mm length and two markers were affixed at the end of the stick. Next, it is hard to measure the movement of lower body, we performed an experiment on the movement of arm. As a result, estimated value by sphere method has a higher accuracy than estimated by circle. Finally, gait acceleration value was observed by acceleration sensor. Then, gait acceleration value had coordinate transform toward direction of movement and filtered by low pass filter. After, Gait velocity and acceleration were calibrated to 0 and integrated. In a result, stride was calculated with high accuracy. In this paper, it is shown that estimated stride and value of human joint center were calculated with high accuracy. To summary, these experiments, it is feasible that the accuracy of stick picture using wearable motion sensor is to be improved.