研究者業績

上野 秀樹

ウエノ ヒデキ  (Hideki Ueno)

基本情報

所属
兵庫県立大学 大学院 工学研究科 電気物性工学専攻 教授
学位
工学博士(大阪大学)
工学修士(信州大学)

J-GLOBAL ID
200901031869315630
researchmap会員ID
1000254209

外部リンク

論文

 110
  • 岡田 翔, 比田悠斗, 三ツ橋昂起, 上野秀樹
    電気学会論文誌C 145(5) 2025年4月1日  査読有り最終著者
  • Hideki Ueno, Megumi Nakayama, Yotaro Ishida, Sho Okada, Tatsuya Mutakamihigashi
    Proceedings of 10th International Conference on Condition Monitoring and Diagnosis 85-88 2024年10月20日  筆頭著者責任著者
  • 中山めぐみ, 岡田翔, 上野秀樹, 牟田神東達也
    電気学会論文誌A 144(9) 385-391 2024年9月1日  査読有り責任著者
  • 上野秀樹, 岡田翔, 比田悠斗, 三ツ橋昂起, 谷直樹
    電気材料技術雑誌 31(1) 26-34 2022年12月  査読有り筆頭著者責任著者
  • Tatsuya Mutakamihigashi, Shunya Tajiri, Sho Okada, Hideki Ueno
    IEEE Transactions on Dielectrics and Electrical Insulation 28(5) 1844-1847 2021年10月1日  査読有り最終著者
    It is well-known that acoustic waves are generated by partial discharge (PD), however, the wave generation mechanism remains unclear. To this end, in this study, a PD test is performed to measure the acoustic waves caused by PD in insulating oil. A needle-plate electrode is applied to generate PD, and the acoustic waves are detected by an acoustic emission (AE) sensor. The PD current and AE signal associated with PD are simultaneously measured, and their relationship is analyzed. The results indicate that the frequency components of an AE signal vary with the PD current duration time. Therefore, the amount of PD charge used as a parameter in dielectric degradation can be derived from the time integral of the PD current. Thus, the acoustic frequency can help estimate the amount of PD charge and the degradation of oil-immersed electric equipment. Furthermore, a possibility of increasing the accuracy of the PD diagnosis method by focusing on AE signal frequency is established.
  • 岡田 翔, 上田唯人, 森岡 慧, 岡 好浩, 上野秀樹
    プラズマ応用科学 29(1) 23-28 2021年7月  査読有り最終著者
  • Sho Okada, Kensuke Nakamura, Kanae Sakamoto, Hideki Ueno
    IEEJ Transactions on Electrical and Electronic Engineering 15(5) 646-651 2020年5月1日  査読有り最終著者
    © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. Ozone has much attention in many industrial fields. To materialize higher ozone generation efficiency, it is necessary to elucidate the relationship between discharge characteristics for discharge electrode system and ozone generation concentration. To clarify the improvement of mechanism on the multiple needle-to-plane configurations, the discharge characteristics and ozone generation characteristics for a multiple needle electrode system with various needle tip distances have been investigated. In this experiment, the maximum ozone yield at needle tip interval of d = 0.5 mm was improved by the minimum discharge power, the local maximal at d = 0.5 mm of discharge volume and the same ozone generation compared with those for d = 0 mm and d = 1 mm. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
  • Sho Okada, Kazuki Tanaka, Shoko Ishizu, Shusuke Takekawa, Hideki Ueno, Shinya Ohta, Akira Mizoguchi, Masaaki Yamauchi
    Lecture Notes in Electrical Engineering 599 LNEE 99-109 2020年  査読有り責任著者
    © Springer Nature Switzerland AG 2020. The abstract should summarize the contents of the paper in short terms, i.e. 150—250 words. Partial discharge characteristics of new developed foamed wire with various insulated layers with low dielectric permittivity by including small air cavities in insulating layer have been studied. Partial discharge inception voltages (PDIV) have been investigated. PDIV depends on insulation layer of enamelled wire clearly, that is, PDIV for enamelled wire using an insulator with lower dielectric permittivity foamed polyimide becomes higher by increasing air cavities in the insulated layer. Furthermore, possibility of partial discharge generation in air cavities in the insulating layer has been also studied. By theoretical electric field analysis, electric field of each cavity is relaxed lower than that at the gap between wires due to presence of a great number of cavities in foamed insulating layer, resulting in suppression of partial discharge in the cavities. Partial discharge initiates in gap between wires before discharge generation in cavities of the new developed wire. From V - t characteristics measurements, the evaluated lifetime for enamelled wire using foamed wire is improved comparing conventional unfoamed one.
  • Tatsuya Mutakamihigashi, Shunsuke Inoue, Sho Okada, Hideki Ueno
    Lecture Notes in Electrical Engineering 599 LNEE 630-639 2020年  査読有り最終著者
    © Springer Nature Switzerland AG 2020. An early detection of abnormality through partial discharge measurement is important for the maintenance of the power quality of equipment. Thus, our group has developed a diagnostic method measuring the ultrasonic waves associated with the partial discharge occurring in a metal casing. As a characteristic test of ultrasonic waves, the discharge current and the ultrasonic wave signal associated with the partial discharge were simultaneously measured. An analysis of each detected signal revealed that there is a possibility that the frequency components of the ultrasonic wave signal have a correlation with the partial discharge charge amount. Ultrasonic waves are elastic, thus the thermal expansion of the medium has an influence on the waveform. Therefore, it is considered a reasonable result that the frequency characteristics of the ultrasonic waves are associated with a partial discharge. Incidentally, it is necessary to estimate the partial discharge charge amount in the case of diagnosing insulation degradation. The partial discharge charge amount is usually determined by the signal strength. Thus, it is necessary to specify the location of the partial discharge occurrence, because the signal intensity of ultrasonic waves decreases with distance. However, by using the knowledge about the frequency characteristics obtained in this work, it becomes possible to estimate the partial discharge charge amount through the ultrasonic wave frequency, without specifying the partial discharge location. In order to evaluate the possibility of the application to actual equipment, our diagnosis method was tested on an oil filled equipment with insulation failure. The test was performed monthly over a three-month period. Each resulting estimated charge amount was less than 1000 pC. Further, a dissolved gas analysis was also carried out each time. The result indicated there was no noticeable change in the acetylene content. Acetylene is generated when a discharge of over 1000 pC occurs. From the above results, the transition value is considered as a reasonable result. In the future, we will try to determine the characteristics of an ultrasonic wave signal accompanying a partial discharge. We also plan to improve the accuracy of a partial discharge diagnostic method.
  • 羽渕雄堂, 岡田翔, 上野秀樹
    電気学会論文誌 C 139(11) 1266-1272 2019年  査読有り最終著者責任著者
  • H.Ueno, N.Tani, A,Nishio, S.Okada
    Proceedings of XXIInd International Conference on Gas Discharges and Their Applications (GD2018), Novi Sad, Serbia 1 259-262 2018年  査読有り筆頭著者責任著者
  • 谷直樹, 岡田翔, 上野秀樹
    電気学会論文誌 C 138(11) 2018年  査読有り最終著者責任著者
  • T. Mutakamihigashi, H. Ueno
    Proceedings of 20th International Symposium on High Voltage Engineering 2017 (ISH2017), Buenos Aires, Argentina (PE1-1,125) 1-6 2017年  査読有り
  • 岡田翔, 澤近航平, 黒島朋哉, 岡好浩, 上野秀樹
    プラズマ応用科学 25(1) 27-32 2017年  査読有り
    A discharge phenomenon was investigated to clarify basic property on cavitation bubble plasma in sodium chloride solution. The discharge plasma emission was observed by using charge coupled device camera with a high speed gated image intensifier unit. Generation and annihilation of plasma in the same cavitation bubbles were continuously repeated. The arch-like discharge path was formed on upper parts of the opposite electrodes because of cavitation bubbles produced on the upper parts of the electrodes besides the rotor part., which gradually extended to the direction that the solution flowed through. The maximum height of the arch-like discharge path was 4 mm, meanwhile the voltage of 160 pulses was applied between the electrodes. It was suggested that these phenomena were repeated in the different cavitation bubbles.
  • S.Okada, H.Ueno
    Frontier of Applied Plasma Technology 10(2) 47-52 2017年  査読有り責任著者
  • H.Ueno, N.Tani, S.Maeda, Y.Inagaki, S.Okada
    Proceedings of XXIth International Conference on Gas Discharges and Their Applications (GD2016), Nagoya, Japan 1 313-316 2016年  査読有り
  • H.Ueno, S.Okada, K.Tanaka, S.Ota, A.Mizoguchi, M.Yamauchi
    Proceedings of The International Conference on Electrical Engineering 2016 (ICEE2016), Okinawa, Japan (90199) 1-5 2016年  査読有り筆頭著者責任著者
  • Tatsuya Mutakamihigashi, Yoshito Kuroishi, Hideki Ueno
    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 192(3) 19-26 2015年8月1日  査読有り最終著者
    We have investigatud the characteristics of radiatud electromagnetic (EM) waves from positive and negative partial0discharges (PD) in epoxy resin qnd cross-linked polyethylene. Wu found that there is a correlatyon among the EM level from PD, the positive PD current, and elestrical trees. Therefore, the growth of an electrical tree produses a lot of positive PD. We havu also investigated the characteristics of the frequency region of EM waves from PD in air, insulating oil, and liquid epoxy in addition to the above insulators. EM waves were detected in the frequency region of 40 MHz to 300 MHz from positive and negative PD in epoxy resin and cross-linked polyethylene. EM waves were also detected in the frequency region of 40 MHz to 150 MHz from positive and negative PD in air. In the case of insulating oil and liquid epoxy, EM waves were detected in the frequency regions of 40 MHz to 150 MHz from positive PD, and 40 MHz to 250 MHz from negative PD. The frequency region differed depending on the material and the discharge polarity. Our investigation indicates that the cause is differences in electric field strength at the time of PD occurrence.
  • H.Ueno, S. Okada, R. Tanaka, Y. Shimizu, Y. Okui
    Proceedings of 19th International Symposium on High Voltage Engineering 2015 (ISH2015), Pilsen, Czech Republic (55) 1-6 2015年  査読有り筆頭著者責任著者
  • T. Mutakamihigashi, S. Okada, H. Ueno
    Proceedings of 19th International Symposium on High Voltage Engineering 2015 (ISH2015), Pilsen, Czech Republic (27) 1-6 2015年  査読有り最終著者
  • S.Okada, H.Ueno
    Proceedings of XXth International Conference on Gas Discharges and Their Applications (GD2014), Orleans, France 1 335-338 2014年  査読有り責任著者
  • 牟田神東達也, 牟田神東達也, 川崎誠, 岡田翔, 上野秀樹
    電気学会論文誌 B 134(2) 177-182 2014年  査読有り最終著者
  • 牟田神東達也, 黒石祥斗, 上野秀樹
    電気学会論文誌 A 134(4) 273-278 2014年  査読有り最終著者
  • 牟田神東達也, 岡田 翔, 上野秀樹
    電気設備学会誌 33(5) 344-350 2013年5月  査読有り最終著者
  • T.Mutakamihigashi, R.Sakurai, S.Okada, H.Ueno
    Proceedings of 18th International Symposium on High Voltage Engineering 2013 (ISH2013), Seoul, Korea (651) 656 2013年  査読有り
  • H.Ueno, T.Okuda, K.Hayashi, S.Okada
    High Voltage Engineering, Proceedings of XIX International Conference on Gas Discharges and Their Applications (GD2012), Beijing, China 38 340-343 2012年  査読有り筆頭著者責任著者
  • Hideki Ueno, Shintaro Kawahara, Hiroshi Nakayama
    OZONE-SCIENCE & ENGINEERING 33(2) 98-105 2011年  査読有り筆頭著者責任著者
    A multiple needles electrode system is one of the good configurations because of easy generation of corona and dielectric barrier discharge suitable to ozone production. On this configuration, discharge and ozone generation characteristics are affected by needle configuration such as needle density, adjacent needles, but their influence has not been clarified in detail until now. In this study, the relationship between barrier discharge characteristics and ozone generation under AC voltage application has been investigated for triple needles-plane configuration with two different needle-tip curvatures (r = 15, 80 m) in dry air, which is a simpler multiple needles configuration. Characteristics of barrier discharge and ozone generation depend on the needle-tip distance and need-tip radius. In the case of the multiple needles configuration with a smaller needle-tip's distance, the barrier discharge characteristics have been strongly affected by the adjacent needles each other. Especially, the ozone production characteristics depend on the needles configurations. The configuration with a smaller needles distance has good ozone productivity compared with other configurations. In addition, ozone concentration and ozone generation efficiency for the triple needles with r = 80 m were higher than those for the needles with r = 15 m. These results can be interpreted by the effect of the space charges and accumulated charges induced by corona discharge and barrier discharge on the space for ozone generation.
  • Hideki Ueno, Shintaro Kawahara, Hiroshi Nakayama
    Electronics and Communications in Japan 93(7) 32-41 2010年7月  査読有り
  • Tomoyuki Hirata, Mitsumasa Koga, Hideki Ueno, Hiroshi Nakayama
    ELECTRICAL ENGINEERING IN JAPAN 171(1) 1-9 2010年4月  査読有り
    We describe the characteristics of a creeping discharge developed in a narrow gap with a backside electrode, under microsecond pulse voltage application. In a gas mixture of 3% SF(6) in N(2), the flashover voltage at pressures of 0.2 and 0.3 MPa decreased by approximately 5% compared to that of 0.1 MPa when using both a filamentous straight backside electrode and a filamentous curved backside electrode. V-characteristics with decreased flashover voltage were obtained with SF(6) mixtures in N(2). We obtained V-characteristics of the flashover voltage for SF(6) concentrations in the range of D = 3 to 100% for a filamentous backside electrode. The flashover voltages obtained with a filamentous straight backside electrode were higher than those obtained with a filamentous curved backside electrode. From corona observation using an ultra-high-speed camera, it was found that the flashover is generated along the backside electrode. (C) 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 171(1): 1-9, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20955
  • H.Ueno, T.Nagamachi, M.Nakamura, H.Nakayama, Y.Hashiba
    Proceedings on Condition Monitoring and Diagnosis 2010 (CMD2010), Tokyo, Japan 1 115-118 2010年  査読有り筆頭著者責任著者
  • H.Ueno, S.Kawahara, H.Nakayama
    Proceedings of 19th World Congress of International Ozone Association (IOA2009)(CD-ROM), Tokyo, Japan (12-2) 1-4 2009年  査読有り筆頭著者責任著者
  • 上野秀樹, 長町峰志, 中村正樹, 中山博史, 柿花邦彦
    電気学会論文誌 A 129(12) 915-921 2009年  査読有り筆頭著者責任著者
  • 飯田隆弘, 榮永剛士, 上野秀樹, 中山博史
    電気材料技術雑誌 18(1) 52-59 2009年  責任著者
  • 平田智之, 古賀充真, 上野秀樹, 中山博史
    電気設備学会 28(10) 790-796 2008年10月  査読有り責任著者
  • 平田智之, 長町峰志, 上野秀樹, 中山博史
    電気学会論文誌 128A(7) 483-489 2008年7月  査読有り責任著者
  • H.Ueno, J.Takegawa, T.Tohara, H.Nakayama
    Proceedings of XVII International Conference on Gas Discharges and Their Applications (GD2008), Cardiff, United Kingdom 1 253-256 2008年  査読有り筆頭著者責任著者
  • 上野秀樹, 西川寛之, 沼田子路, 中山博史
    静電気学会誌 32(3) 129-136 2008年  査読有り筆頭著者責任著者
  • 平田智之, 上野秀樹, 中山博史
    静電気学会誌 32(3) 122-128 2008年  査読有り責任著者
  • 上野秀樹, 川原慎太郎, 中山博史
    電気学会論文誌 A 128(11) 4-682 2008年  査読有り筆頭著者責任著者
  • 平田智之, 上野秀樹, 中山博史
    静電気学会誌 32(3) 2008年  責任著者
  • 平田智之, 長町峰志, 上野秀樹, 中山博史
    電気設備学会誌 28(10) 2008年  責任著者
  • 上野秀樹, 川原慎太郎, 桑田健司, 中山博史
    電気材料技術雑誌 17(1) 2008年  筆頭著者責任著者
  • 平田智之, 古賀充真, 上野秀樹, 中山博史
    電気学会論文誌 A 128(7) 3-489 2008年  査読有り責任著者
  • Hideki Ueno, Koji Hata, Hiroshi Nakayama
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 46(3A) 1142-1148 2007年3月  査読有り筆頭著者責任著者
    Barrier discharge characteristics have been investigated for a twin needles-to-plane electrode configuration in dry air. The characteristics of barrier discharge under ac voltage application have been investigated for various distances between two needle tips (d = 1.0-4.0 mm). We have found that corona discharge behavior strongly depends on needle-tip distance. In the case of a twin-needles configuration with a long needle-tip distance (d = 4.0 mm), discharges from the two needle tips develop into a dielectric barrier with almost a straight path. On the contrary, the development of repulsive discharges from two needle tips in the gap between needles and a barrier was obtained for the shortest needle-tip distance investigated here (d = 1.0 mm) and it was enhanced by increasing the peak voltage. From detailed time-resolved observations, development of repulsive discharge was observed only during positive polarity upon ac voltage application. Moreover, the degree of repulsion increased with increasing applied voltage of positive polarity. The observed unique discharge behavior can be interpreted as the effect of field relaxation induced not only by charge accumulation on the barrier surface, which is markedly enhanced at a short needle-tip distance, but also by space charge by coronas between two needles.
  • H. Ueno, P. Walter, C. Cornelissen, A. Schnettler
    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 14(1) 249-256 2007年2月  査読有り筆頭著者責任著者
    Ultrasound is a well-known diagnosis tool that can be used for the condition assessment of insulating systems. For this special purpose, various investigations on the detectability of the included inhomogeneities are performed: The resolution of ultrasonic measurements on high voltage insulations has been evaluated by using standardized Landolt rings in silicone rubber and epoxy resin. Although a dependency exists on the ring position, the diagnostic system that is used is able to image the gap with a sub-millimeter size. In other words, the system has recognition ability for two different objects close to such a distance. Regarding detectability, it has been found that in addition to ball-shaped inhomogeneities, the system can also detect thin fibrous objects with a diameter of a few micrometers. Finally, the results are used to detect and characterize electrical trees in silicone rubber.
  • Tomokyuki HIRATA, Hideki UENO, Hiroshi NAKAYAMA
    Proceedings of The XVth International Symposium on High Voltage Engineering (ISH2007), Ljubljana, Slovenia (T3-065) 1-6 2007年  査読有り責任著者
  • Hideki UENO, Takaaki TOHARA, Hiroshi NAKAYAMA
    Proceedings of The XVth International Symposium on High Voltage Engineering (ISH2007), Ljubljana, Slovenia, (No.T3-064) 1-6 2007年  査読有り筆頭著者責任著者
  • Tomoyuki Hirata, Hideki Ueno, Hiroshi Nakayama
    ELECTRICAL ENGINEERING IN JAPAN 158(2) 31-38 2007年1月  査読有り
    The flashover voltage with a backside electrode was found to be lower than that without the backside electrode. Under microsecond pulse voltage application, we describe the characteristics of a creeping discharge developed in the narrow gap with the backside electrode. Using a CCD camera and ultrahigh-speed camera, we observed the corona extension processes. The lowest flashover voltage was found to be obtained at positive polarity with a SF6 content D = 3%. In the corona extension obtained using an ultrahigh-speed camera, peculiar differences were observed in the corona extension process. The corona extension increased, and rapid flashover was observed at D = 3%. Using a CCD camera, small coronas were detected from the backside electrode. (c) 2006 Wiley Periodicals, Inc.
  • 武田学, 平田智之, 上野秀樹, 中山博史, 谷口和彦, 森田祐志
    電気設備学会誌 27(1) 90-96 2007年  査読有り責任著者
  • H.Ueno, T.Higashinaka, T.Nagamachi, H.Nakayama, M.Kawasaki, K.Kakihana
    Proceedings of XVI International Conference on Gas Discharges and Their Applications (GD2006), Xi'an, China 1 57-60 2006年  査読有り筆頭著者責任著者

MISC

 118

書籍等出版物

 5

講演・口頭発表等

 320

担当経験のある科目(授業)

 17

共同研究・競争的資金等の研究課題

 10

産業財産権

 46