著者
金井 靖 中嶋 新一
出版者
新潟工科大学
雑誌
新潟工科大学研究紀要 (ISSN:1342792X)
巻号頁・発行日
vol.10, pp.31-46, 2005-12

This paper describes the magnetic refrigeration at near-room temperature. First, sphere of Gadolinium (Gd), 0.6 mm in diameter, was prepared as a magneto-caloric medium and the temperature change of Gd versus applied field was investigated. It was found that the linear temperature rise/fall was found for applied field. Then, magnetic circuit was designed by the finite-element magnetic field analysis. The magnetic circuit consisted of NdFeB permanent magnet, iron yoke stator, and vessel for Gd sphere, with moving stage was made as a trial. A heat-exchanger circuit using coolant was constructed with water pump and solenoid and the system was tested with regard to heat-exchanging ability. The obtained temperature change was very small due to low magnetic field applied to the Gd sphere and small Gd volume. The future work was also noted.
著者
田村 和巳 林 豊彦 中嶋 新一 小林 博 山田 好秋 石岡 靖 宮川 道夫
出版者
一般社団法人電子情報通信学会
雑誌
電子情報通信学会技術研究報告. MBE, MEとバイオサイバネティックス
巻号頁・発行日
vol.95, no.404, pp.61-68, 1995-12-09
被引用文献数
5

顎連動の制御メカニズムを解明するために,我々はヒトに近い構造をもつ自律顎運動ロボットと咬合力センサを開発してきた.このロボットには,DCサーボモータでワイヤを駆動する方式を用いた咬筋と外側翼突筋アクチュエータが装着されている.これらアクチュエータの制御にインピーダンス制御と適応制御を用いることにより,ヒトに近いかみしめを伴う開閉口運動を実現できた.しかしこの制御系は,等張性収縮において完全な位置制御を行っており,この点では実際の筋と異なっていた.これを改善し,より正確に伸張反射系をシミュレートするために,筋種や連動相の違いによりワイヤ長のフィードバック量を調節できるようにした.この制御系の改良と顎二腹筋アクチュエータの追加により,従来より自然な開閉口連動を実現することができた.
著者
兪 竹青 那須 康雄 中嶋 新一 水戸部 和久
出版者
公益社団法人精密工学会
雑誌
精密工学会誌 = Journal of the Japan Society of Precision Engineering (ISSN:09120289)
巻号頁・発行日
vol.67, no.5, pp.764-769, 2001-05-05
被引用文献数
1 1

This paper proposes an ultrasonic position measurement system for mobile robot moving in wide-area. The system uses ultrasonic receiver net which consists of many ultrasonic receivers with wide beam (100°) allocated at a constant interval on a ceiling. The ultrasonic receiver net covers all area where mobile robot moves. And two ultrasonic transmitters with wide beam (100°) are placed at rear and front of mobile robot to transmit ultrasonic wave toward ceiling alternately. Some receivers of receiver net can receive the ultrasonic wave, so the distances between transmitters and receivers can be obtained. Three optimal distances are selected to estimate the positions of the transmitters, and the posture of the mobile robot is estimated by the positions of the two transmitters. Theoretical analysis and experimental results show that the estimated position measurement error is φ 62mm and estimated posture error is ±4°. The ultrasonic receiver net can be expanded easily, making possible to measure position of a mobile robot moving in wide-area, especially in bad visible environment.