Micromechatronics

Online ISSN : 2432-0358
Print ISSN : 1343-8565
ISSN-L : 1343-8565

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Predecessor

Volume 53, Issue 201

Displaying 1-17 of 17 articles from this issue

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[title in Japanese]

Article type: Cover
2009 Volume 53 Issue 201 Pages Cover1-
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_Cover1

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[title in Japanese]

Article type: Cover
2009 Volume 53 Issue 201 Pages Cover2-
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_Cover2

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[title in Japanese]

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 1-
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_1

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An Error Offset Method for PHS Positioning System Based on Mahalanobis Distance

Naoaki YOKOI, Yasuhiro KAWAHARA, Hiroshi HOSAKA, Kenji SAKATA

Article type: Article
2009 Volume 53 Issue 201 Pages 2-8
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_2

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Focusing on the PHS positioning service used in physical distribution of logistics, a positioning error offset method for improving positioning accuracy is proposed. The PHS system has a defect that the measurement errors are large ranging from several ten meters to several hundred meters caused by the fluctuation of radio waves by buildings around the terminal. In this research, an error offset method is developed which learns patterns of positioning results (latitude and longitude) containing errors and the highest signal strength at major logistic points in advance, and matches them with the new data measured at actual distribution processes according to Mahalanobis distance. Then the matching resolution is reduced to 1/40 of the conventional error offset method.

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Development of Torque Return System

Nobuyuki HIROSE, Osamu TAKAHASHI, Masatoshi MOTEKI, Masaaki MAEJIMA

Article type: Article
2009 Volume 53 Issue 201 Pages 9-17
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_9

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A Spring Drive is a highly accurate mainspring driven watch that uses the mainspring as a power source and an electronic regulator to control hand speed. The output torque of the mainspring is highest when the mainspring is fully wound and gradually decreases as the mainspring unwinds. A torque-return system that extends the power reserve by winding the mainspring using energy spent on an electromagnetic brake when torque is high has been developed and provided on the Cal. 7R08. This system extends the power reserve by seven hours, without changing the mainspring.

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UV-LIGA technology for mechanical watch

Takashi NIWA, Khoichiroh JUJO, Matsuo KISHI, Hiroyuki Hoshina, Satoshi ...

Article type: Article
2009 Volume 53 Issue 201 Pages 18-23
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_18

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We developed a manufacturing process utilizing UV-LIGA process to fabricate high-precision metal components for mechanical watches. Surface roughness of the components was reduced to one-half to one-fifth of that of the components fabricated by traditional machining process. Weight reduction was also attained. These improvements in dimensional accuracy and weight contributed to improvement of timing accuracy and durability.

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Behavior Recognition using Foot Pressure Sensing Shoes

Chika SUGIMOTO, Kenji OZAKI, Ryosuke EZOE, Hiroshi HOSAKA, Hiroyuki YA ...

Article type: Article
2009 Volume 53 Issue 201 Pages 24-32
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_24

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To recognize human behavior, foot pressure sensing shoes were developed, and an analysis for discriminating the user's actions from the foot pressure distribution was examined, considering the movements, walking, running, standing, sitting, going upstairs and downstairs, and cycling. These seven actions were discriminated with a high accuracy using feature quantities such as the average, standard deviation, maximum, and difference deviation extracted from the data of only three sensors by discriminant analysis. In addition, by canonical discriminant analysis, discriminant functions which classify the seven actions with an accuracy of 100% were derived by using feature quantities extracted from the data of five sensors or less.

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 33-38
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_33

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Seiko Epson has developed the Direct Drive Cal. 5D as a new model of Kinetic series; its uniqueness is to enhance an interrelated communication with a user and a watch. Its characteristics are as follows: 1) A switching wheel accelerating rotating speed which synchronizes both automatic power generation and the manual power generation, which is newly developed. 2) A permanent power reserve system that has a power generation display function and then displays the amount of generated electronic power by manual power generation means. 3) An electronic charging load system that enables this model to display more accurate duration of operating compared to conventional rough calculation means.

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Development of promaster radio controlled divers watch

Ken KITAMURA, Teruhiko FUJII, Masahiro MAMIYA, Takushi HAGITA

Article type: Article
2009 Volume 53 Issue 201 Pages 39-43
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_39

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A diver watch with "Radio-Controlled" and "Eco-Drive" technologies implemented has been developed by Citizen Watch Co., Ltd. on a commercial basis. We report on an antenna, a receiver system and a structure of the movement which provide sufficient water-tightness and sensitivity of the radio-wave, thereby meeting stringent JIS and ISO requirements.

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[title in Japanese]

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 44-47
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_44

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[title in Japanese]

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 48-56
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_48

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 57-61
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_57

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[title in Japanese]

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 62-67
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_62

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Water-resistant watches & Diver's watches

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 68-79
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_68

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[title in Japanese]

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 80-81
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_80

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[title in Japanese]

[in Japanese]

Article type: Article
2009 Volume 53 Issue 201 Pages 82-84
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_82

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[title in Japanese]

Article type: Appendix
2009 Volume 53 Issue 201 Pages 89-
Published: December 10, 2009
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/micromechatronics.53.201_89_2

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