1 0 0 0 OA スプリングドライブソヌリの開発(研究)
- 著者
- 茂木 正俊 高橋 理 塩原 研治
- 出版者
- 一般社団法人日本時計学会
- 雑誌
- マイクロメカトロニクス (ISSN:13438565)
- 巻号頁・発行日
- vol.52, no.198, pp.13-22, 2008-06-10
- 被引用文献数
- 1
This paper describes an air-viscous slow governor used in Spring Drive Sonnerie. Spring Drive movement makes no noise during hand movement. This is an ideal condition for installing mechanism for striking a bell. Japanese Buddhists' prayer bell "orin" was chosen for the sound source. Our objective was to create a sonnerie that offered the resonance and the clear tone of an orin. The reverberation resonance of an orin is produced by a hammer that strikes the bell at approximately 3-second interval. Along with the smoothly flowing second hand, the sound imparts a sense of slow and tranquil flow of time. To achieve the ringing tone of an orin amid a tranquil stillness, we developed a non-contact slow governor that made virtually no noise. The key to the "silent" slow governor is the wings around the rotor that produce resistance caused by viscosity of the air. This rotor turns at a constant speed at which the reactive force of the main spring and the viscous resistance caused by the air are balanced.
1 0 0 0 谷口紀男先生を悼む
- 著者
- 飯島 重孝
- 出版者
- 一般社団法人日本時計学会
- 雑誌
- マイクロメカトロニクス (ISSN:13438565)
- 巻号頁・発行日
- vol.44, no.1, 2000-03-10
1 0 0 0 OA CMOS型エリアイメージセンサ
1 0 0 0 OA 人体を伝送路とした情報通信デバイスの開発
- 著者
- 蜂須賀 啓介 中田 杏里 武田 輝人 柴 建次 佐々木 健 保坂 寛 板生 清
- 出版者
- 一般社団法人日本時計学会
- 雑誌
- マイクロメカトロニクス (ISSN:13438565)
- 巻号頁・発行日
- vol.46, no.2, pp.53-64, 2002-06-10
- 被引用文献数
- 11
Personal area network requires wireless communication system for exchanging information among wearable electronic devices. Intra-body communication that uses a human body as a transmission medium allows wireless communication without using airborne radio waves. Measurements of transmission characteristics of intra-body communication have shown that the optimum carrier frequency was 5MHz. Audio frequency signal was successfully transmitted through a human body using newly developed 10.7MHz FM transmitter and receiver modules, both having the size of 3cm by 3cm. The carrier frequency was selected to utilize commercial RF devices.