Search Results 1-15 of 15

  • Preparation and Characteristic Evaluation of Silica-agglomerate Electret with Ultra-thin PTFE Layer for Ultrasonic Sensor  [in Japanese]

    Kageyama Kensuke , Orikasa Takeru , Jamaludin Ahmad Zarif Afiq Bin , Sakai Takenobu

    … <p>Influence of formation of silica agglomerates on a ultra-thin fluororesin electret on the characteristics of the charge-retention and the aero-ultrasonic sensor was investigated. …

    IEEJ Transactions on Sensors and Micromachines 138(9), 441-447, 2018

    J-STAGE 

  • Fabrication and Characteristic Evaluation of Electret Condenser Sensor for Measurement of Acoustic Emission in Living Tree  [in Japanese]

    KAGEYAMA Kensuke , LU Ziyao , SUGAWARA Takuya , SAKAI Takenobu

    …    Electret condenser sensors (ECS) is suitable for detection of ultrasounds propagating air and soft materials because it has an air gap in the element. … ECS demonstrated the higher S/N ratio from 40 to 100 kHz for the detection of the artificial AEs than a piezoelectric AE sensor (PS) and a wideband acceleration sensor (AC). …

    Journal of the Japanese Society for Experimental Mechanics 16(4), 295-300, 2017

    J-STAGE 

  • Fabrication and Evaluation of the Motion Sensor using FilmECS Array  [in Japanese]

    Onodera Masaru , Kageyama Kensuke

    … Finger tracking using motion sensor has been attractive technique for non-contact operation of electric devices. … The piezoelectric sensor, however, is impossible to detect the motion at close range because the several ultrasonic waves are overlapped. … In this study, the array of electret condenser sensors with film lamination (FilmECS) was fabricated to track a finger above a mobile device. …

    IEEJ Transactions on Sensors and Micromachines 136(4), 120-126, 2016

    J-STAGE 

  • Fabrication and Evaluation of Dual Sensor Using Electret Sensor with Film Lamination

    ONODERA Masaru , KAGEYAMA Kensuke

    Electret condenser sensor with PFA film lamination using silica-agglomerates electret (FilmECS) demonstrates an excellent flexibility and low acoustic impedance compared with piezoelectric sensors. … of the transmitting and receiving waveform was related to the contact pressure when the dual sensor was placed on the several soft materials. …

    Journal of the Japanese Society for Experimental Mechanics 15(1), 64-68, 2015

    J-STAGE 

  • 222 Fabrication and Evaluation of Flexible Acceleration sensor using Film Laminated ECM  [in Japanese]

    KAGEYAMA Kensuke , KANEKO Shintaro

    … Flexible acceleration sensor can be expected by the technique of an electret condenser microphone with film lamination (FilmECM). … In this study, flexible electret condensor sensor (FilmECS) was fabricated using FilmECM. … The measurement of the acceleration generated from a vibration of an Al plate was measured by the FilmECS and a commercial acceleration sensor. …

    The Proceedings of the Materials and processing conference 2013.21(0), _222-1_-_222-3_, 2013

    J-STAGE 

  • Low Powered Pre-amplifier for Capacitive Sensor  [in Japanese]

    NAKAMURA Tetsuo , KURIHARA Yosuke , WATANABE Kajiro , TERADA Masahide

    計測自動制御学会論文集 = Transactions of the Society of Instrument and Control Engineers 48(10), 607-613, 2012-10-31

    References (21)

  • Fabrication and Evaluation of Electret Condenser Sensors with Layered Microgaps for Ultrasonic Measurement of Natural Rubbers

    KAGEYAMA Kensuke

    実験力学 : journal of JSEM 12(1), 37-42, 2012-03-28

    References (6)

  • Fabrication and Characteristic Evaluation of Electret Condensor Microphone with PFA Film Lamination  [in Japanese]

    KAGEYAMA Kensuke , NAGASHIMA Hideaki

    Electret condenser microphones (ECM) with perfluoroalkoxy (PFA) film lamination (FilmECMs) were fabricated and the microgap layers were formed between laminated films in the gap of FilmECM to enhance the electric field in the gap and the resonance frequency. … Hence, FilmECM should have a great potential for a wideband mircrophone or an ultrasonic sensor. …

    IEEJ Transactions on Sensors and Micromachines 132(1), 10-15, 2012-01-01

    J-STAGE  References (11)

  • Low Powered Pre-amplifier for Capacitive Sensor

    NAKAMURA Tetsuo , KURIHARA Yosuke , WATANABE Kajiro , TERADA Masahide

    … This paper describes a novel low-powered preamplifier for capacitive sensor using electret film such as a condenser microphone. … Due to the expansion of sensor applications as ambient sensors such as the smart fire alarm, general purpose security sensor and vital sign detection sensor, it must work for at least one year with a small dry buttery. …

    Transactions of the Society of Instrument and Control Engineers 48(10), 607-613, 2012

    J-STAGE 

  • Fabrication and Evaluation of Electret Condenser Sensors with Layered Microgaps for Ultrasonic Measurement of Natural Rubbers

    KAGEYAMA Kensuke

    … Poled PZT has extremely high polarization compared to a polymer electret. … For this study, electret condenser sensors (FeECSs) were prepared with microgaps formed by film lamination and a poled PZT electret. … Discharge in the electret (PZT) might cause time degradation, thereby necessitating improvement of the insulation of the ferroelectric ceramics. …

    Journal of the Japanese Society for Experimental Mechanics 12(1), 37-42, 2012

    J-STAGE 

  • Sound detector using microphone array and local area network  [in Japanese]

    MURAKAMI Takuya , KIRYU Shogo , ASHIHARA Kaoru

    災害現場での生存者捜査等を目的とする高感度音源探査システムを開発するための基礎研究として,比較的廉価なデバイスを用いて7chのマイクロホンアレイを試作した。マイクロホン,アンプ,AD変換器からなるハードウェアと遅延和合成処理を行う制御部をネットワーク経由で結ぶことにより,遠隔地からの制御を可能とする。検証実験の結果から,実用的なサンプリング周波数とマイクロホンの個数の検討,アンプ増幅率を改善する必 …

    IEICE technical report 108(491), 55-60, 2009-03-20

    References (2) Cited by (1)

  • M5-2 Development of inorganic electret film and charging method for silicon electret condenser microphone (M5 Actuator and Physical Sensor)  [in Japanese]

    Iguchi Yoshinori , Hagiwara Kei , Goto Masahide , Yasuno Yoshinobu , Kodama Hidekazu , Kidokoro Kenichi , Tajima Toshifumi

    … Towards low-voltage and high-performance subminiature microphone, we are studying silicon electret condenser microphone. … Recently, we developed a novel charging method for electret films using soft X-ray irradiation. … In this paper, the principle of the charging method and the surface potential of a charged inorganic electret film are reported. …

    The Proceedings of the Symposium on Micro-Nano Science and Technology 2009.1(0), 85-86, 2009

    J-STAGE 

  • Structure and sensitivities of compact sensors for body-conducted sound detection  [in Japanese]

    SHIMIZU Shota , HIRAHARA Tatsuya , OTANI Makoto

    体導音を検出する小型センサを試作し、その構造と感度特性を明らかにした。我々は体導音を、体の内外にある音源によって引き起こされる振動が体内や体表を伝搬し、体表面に設置したセンサで検出される「音」と定義した。我々はNAM(non-audible murmur)マイクロホンをベースとした、体導音を検出する小型体導音センサを試作した。この小型体導音センサはダイヤフラムを露出したECMを直径20mmφ、高さ …

    IEICE technical report 108(255), 13-18, 2008-10-16

    References (18)

  • A Rate Gyro Using an Acoustic Bridge

    ISHII Yasushi

    … Two electret condenser microphones are mounted on the top of the vessel to detect the sound pressures at both sides of the sensing channel. …

    Transactions of the Society of Instrument and Control Engineers 26(12), 1356-1361, 1990

    J-STAGE 

  • Fibrillation detection method using blood pressure sensor and evaluation of output circuit in implantable defibrillator.  [in Japanese]

    MAKINO Hideo , SAITOH Yoshiaki , MITAMURA Yoshinori , MIKAMI Tomohisa

    … To obtain a high reliability of fibrillation detection in an implantable automatic defibrillator, a new fibrillation sensor has been developed, and also the defibrillator circuit has been improved.<br>For reliable fibrillation sensing, dual criteria before delivering a shock has been required. … In our research, blood pressure variation was used as another fibrillation detection factor, and a loss of rhythmic output of the sensor was used to detect fibrillation condition. …

    Japanese journal of medical electronics and biological engineering 24(3), 157-162, 1986

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