著者

籏福 寛

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.121, no.8, pp.739-744, 2001-08-01 (Released:2008-07-15)

参考文献数

5

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The magnetic field strength in the nickel rod with an applied uniform external field is studied by transmitting ultrasonic waves. In the non-destructive testing (NDT) longitudinal plane waves are transmitted from a ultrasonic transducer to the object, which is characterized by alternating regions of compression and dilation. If the objects are ferromagnetic materials, the compression waves generate the magnetoelastic energy in magnetic substances, which are equivalent to the magnetic anisotropy field. This field passes through magnetic substances with the velocity of ultrasound and is observed as the electromotive force, emf, induced in the sensing coil. As the ultrasonic waves are transmitted continuously to a rod specimen the ultrasonic stationary wave is formed in it and the high frequency magnetic field is generated in nodes of the stationary state by the inverse effect of magnetostriction and then the emf is induced in the nodes. In this paper the strength of effective magnetic field in the nickel rod is estimated by measuring the electromotive force induced in the sensing coil.

著者

太田 昭男 坂口 広憲 坂本 徹 浅野 恭一

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.123, no.7, pp.611-617, 2003 (Released:2003-10-01)

参考文献数

10

被引用文献数

1

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Using a scanning Hall-sensor microscope with an active area 25µm×25µm, we measured the magnetic field distributions due to spontaneous magnetization on flat surfaces of low carbon steel SM400B with a yield point of 326N/mm2 and a pulling strength of 469N/mm2 under a static condition of terrestrial magnetism. Referring to the stress-strain curve, we applied a uniaxial stress to the sample and increased the stress level following the pre-scheduled experimental run, while measuring the magnetic profiles both for the stress state and after its release. The magnetic profile in the elastic stress nearly agrees with that after the release, and also agrees with that for the virgin state. However, as the stress level increases beyond the yield point and gives the residual strain after the stress release, there appear marked changes only in the results after the release compared to the others, which are attributed to the occurrence of Lüders bands. The positions with such changes in the magnetic profile move along a length direction of the sample, with extension of the Lüders bands to the whole part. The study shows the possibility to obtain information on a degree of strain progress in steels using magnetic images and to open up a practical way for non-destructive testing.

著者

本多 史明 細野 智史 末重 良宝 藤野 真久 須賀 唯知 一木 正聡 伊藤 寿浩

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.133, no.11, pp.B320-B325, 2013-11-01 (Released:2013-11-01)

参考文献数

9

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PZT (Pb(Zrx,Ti1-x)O3) thin film capacitors using Nano-transfer method has been developed for the fabrication technology of smaller capacitors. The adhesion strength of Pt to SiO2 was shown to be important among process factors. The adhesion force was shown to be originated from the material diffusion in the crystallization process mainly by the observation of TEM and XPS analysis. In this paper, diffusion of ingredients of PZT which is supposed to be one of the factors of the variation was investigated. It was confirmed that diffusion of Pb certainly occurs and this diffusion reinforces the adhesion strength in accordance with the Pt thickness. It is concluded that the diffusion is surely one of the factors of the variation of the adhesion strength.

著者

鳥居 建男

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.136, no.12, pp.816-820, 2016-12-01 (Released:2016-12-01)

参考文献数

34

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1.はじめに1997年1月27日午前4時30分。日本海沿岸にある高速増殖炉もんじゅにおいて格納容器内に設置されている放射線モニタが線量率の高警報を吹鳴し,筆者は呼び出された。どうも大きな落雷がもんじゅの近くで発生したため,建物内の放射線モニタの指示値が瞬時的に上昇し,警報レ

著者

星合 隆成 久保田 稔

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.121, no.3, pp.178-184, 2001-03-01 (Released:2008-04-17)

参考文献数

12

被引用文献数

1 2

著者

梶山 智晴 富田 裕之 宮原 裕二

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.119, no.10, pp.464-469, 1999-10-01 (Released:2008-12-19)

参考文献数

4

被引用文献数

1 1

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We have developed a new method for cleaning flow-through cells by using microbubbles and ultrasonic (US) standing waves. A standing wave generated by US transducers at 1 MHz was used to trap microbubbles at node positions of the sound pressure. We were also able to control the microbubbles' positions spatially through frequency modulation. We found that these microbubbles were very effective for washing microbeads out of flow-through cells, particularly when frequency-modulated US irradiation was used. The proposed method promises to be very useful for cleaning the flow-through cells in small analytical instruments.

著者

垂井 康夫 松川 隆行

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.106, no.9, pp.895-898, 1986-09-20 (Released:2008-04-17)

参考文献数

11

著者

莅戸 立夫 裴 鐘石 水野 皓司

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.119, no.10, pp.1100-1104, 1999-10-01 (Released:2008-12-19)

参考文献数

24

著者

岩間 和夫

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.76, no.809, pp.168-174, 1956-02-01 (Released:2008-11-20)

著者

桜井 良文 市川 永治

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.78, no.843, pp.1580-1584, 1958-12-01 (Released:2008-04-17)

参考文献数

9

著者

曽根 悟

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.113, no.1, pp.39-42, 1993-01-20 (Released:2008-04-17)

参考文献数

1

被引用文献数

1

著者

浅野 浩志

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.123, no.1, pp.39-40, 2003-01-01 (Released:2008-04-17)

著者

小島 洋一郎

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.124, no.4, pp.150-151, 2004 (Released:2004-07-01)

参考文献数

4

被引用文献数

1 1

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In this paper, the waveform of an ultrasonic wave with frequency of approximately 5 MHz propagating through various taste solutions was measured. Furthermore, these solutions were investigated by using surface plasmon resonance (SPR). As a result, differences among solutions were clearly observed. Therefore it was found that the possibility of taste sensing using ultrasonic wave and SPR was obtained from taste solutions.

著者

青木 由直

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.102, no.6, pp.511-514, 1982-06-20 (Released:2008-04-17)

参考文献数

17

著者

淺川 和雄 吉澤 英樹

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.113, no.4, pp.265-273, 1993-04-20 (Released:2008-04-17)

参考文献数

24

著者

高山 聡志

出版者

一般社団法人 電気学会

雑誌

電気学会誌

巻号頁・発行日

vol.137, no.3, pp.177-177, 2017

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<p>はじめに</p><p>2016年11月22日(火),23日(水・祝)の2日間にわたって電気関係学会関西連合大会(以下,関西連合大会)が開催された。この大会は電気関連の学術分野を持つ電気学</p>

著者

鈴木 浩 岩崎 佳子

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.116, no.12, pp.799-816, 1996-11-20 (Released:2008-04-17)

著者

小林 大太 居村 岳広 堀 洋一

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.136, no.6, pp.425-432, 2016

被引用文献数

14

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Transmitting efficiency is one of the most important characteristics in dynamic wireless power transfer for electric vehicles. In this paper, a simple and efficient topology for a transmitting system called the DC bus system is introduced. Its simplicity maximizes the potential transmitting efficiency. Moreover, a receiving circuit topology and a maximum efficiency control, which is a method to maximize the transmitting efficiency by controlling the secondary voltage, are proposed. A real-time coupling coefficient estimation method is necessary to calculate the secondary voltage command for the control. A simulation and experimental evaluation of the maximum efficiency control was performed using an experimental setup. The results indicate that it provides a large improvement in efficiency and its implementation in a real dynamic power transfer system for electric vehicles is feasible.

著者

榎本 武揚

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.14, no.78, pp.14-23, 1895-01-31 (Released:2010-02-24)

著者

吉浦 紀晃 小野里 好邦 木村 博茂

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.124, no.8, pp.1538-1545, 2004 (Released:2004-11-01)

参考文献数

27

被引用文献数

1

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In biometric authentication, the biometric data is registered and authentication is done by collation input biometric data with the registered biometric data. If the registered biometric data is stolen, there is a possibility that the the biometric data of registrants may be used improperly. It is very difficult to prevent such improper use because we no longer change biometric data. Therefore it is necessary to pay sufficient attention to the protection of biometric data. This paper proposes the application of one way function to biometric authentication in order to protect biometric data of registrants. We examine and discuss the possibility of application of one way function in biometric authentication.