1987 Fiscal Year Final Research Report Summary
Developmnent of high-performance sensor devices using amorphous magnetic materials
| Project/Area Number |
60850078
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
計測・制御工学
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| Research Institution | Kyushy Institur te of Technology |
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Principal Investigator |
JIRO YAMASAKI Faculty of engineering, Kyushu Institute of Technology, 工学部, 助教授 (40108668)
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| Co-Investigator(Kenkyū-buntansha) |
RYUZO UEDA Faculty of engineering, Kyushu Institute of Technology, 工学部二部, 教授 (60039120)
KANEO MOHRI faculty of engineering, Hyushu institule of Technology faculty of engineering, N, 工学部(昭和62年10月より名古屋大学・工学部・教授), 教授 (10037814)
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| Project Period (FY) |
1985 – 1987
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| Keywords | Amprphoud magmetic material, / sensor / multivibrator / large Barkhausen effect / Matterucci effect / magnetic encoder / mechanocardiogram / 生体マイクロバイブレーション |
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| Research Abstract |
1. Constitution of high-performacne sensor devices.
(1) Reinforcement of the large barkhabusen and Matteucci effects in amorphous wires: These effects were remarkably reinforced through cold drawing followed by tension annealing ot torsion annealing ofr amorphous magnetostrictive wires. The figure of metir ep/1* (ep: Matteucci volrage, and 1*: veitical length of the wire) became about 200 times that of as prepared wires.
(2) Inverter current sensors: More than 6 pairs of amorphous microcores were set atound a condictour wire to detect noncontactly the wire current canelling external disturbance filds. A negative feedback multivebrator cirucuit was used for stable current detection fot the core temperature variation of - 200 to 200 ゜C.
(3) Sinusoidal magnetic encoder: 100 pairs of amorphous microcores were set around a 100-pole ring magnet for detection of accurate sinusoidal leakage fulux along to cancellations of irregulat distribution of field strength at each pole, indluence of the off-center motion of the shagr, and external disrurbance field.
(4) Shafr torque sensor: An accurate torque sensor detecting a twisted angle between two points of a shaft of as small as 0.002゜ was constituted. At each point, a star-shaped amorphous core facing a multi-pole ring magnet was fixed.
2. Sensing of microvibrations at a hnuman body skin:
The mictovibrations of 0.1 - 300 um were stabley detected using a non-contact magnet displacement sensor with and amorphous star shaped core. These data would be important information for giagnosis of heart deseases and bllod circulation system.
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Research Products
(11 results)
