[특허]Encoder unit using magnetoresistance effect element

Encoder unit using magnetoresistance effect element 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01B-007/14
출원번호	US-0893215 (1986-08-05)
우선권정보	JP-0173287 (1985-08-08); JP-0201617 (1985-09-13); JP-0201618 (1985-09-13)
발명자 / 주소	Abiko Shuzo (Chichibu JPX) Goto Hirokazu (Hanno JPX) Kuhara Masakazu (Chichibu JPX) Sano Hideto (Chichibu JPX) Hayashi Hisanori (Chichibu JPX) Osato Takeshi (Chichibu JPX)
출원인 / 주소	Canon Denshi Kabushiki Kaisha (Chichibu JPX 03)
인용정보	피인용 횟수 : 10 인용 특허 : 9

초록 ▼

An encoder unit comprising an object to be detected having a track having a first region with a magnetization pattern at a predetermined pitch and a second region having no periodic magnetization pattern, and a detector having a magnetoresistance effect element arranged in the direction which intersects the direction of the magnetic flux of the magnetization pattern and in opposed relationship with the object to be detected. The encoder unit is simple in construction yet capable of detecting the position of the object to be detected with a higher degree of accuracy than conventional encoders.

대표청구항 ▼

An encoder unit comprising: an object to be detected which has a plurality of tracks each alternately having a first region having a periodic magnetization pattern and a second region having no magnetization pattern, the length of said second region being greater than the period of said periodic magnetization pattern of said first region; and a detector for detecting said object to be detected having a plurality of sensors disposed in opposed relationship with said object to be detected and oriented in the direction which intersects the direction of the magnetic flux of the magnetized pattern of said first region, each of said plurality of sensors having a plurality of unit magnetoresistance effect elements which are equidistantly spaced apart from each other and which are connected in series, the spacing between adjacent elements of said sensors being less than the length of the period of said magnetization pattern.

이 특허에 인용된 특허 (9)

Makino Yoshimi (Fujisawa JA), Apparatus for measuring the direction and relative position between a body and a pick-up using a magnetoresistive pick u.
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Takahashi Tadashi (Hitachi JPX) Miyashita Kunio (Hitachi JPX) Hayashida Hiroshi (Mito JPX), Device for detecting the relative and absolute position of a moving body.
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Takahashi Tadashi (Hitachi JPX) Hayashida Hiroshi (Mito JPX) Miyashita Kunio (Hitachi JPX), Magnetic head for sensing the position of a moving member.
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Ito Susumu (Tokyo JPX) Toki Kaoru (Tokyo JPX), Magnetic rotary encoder for detection of absolute values of angular displacement.
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Ito Susumu (Tokyo JPX) Nagao Morimasa (Tokyo JPX) Toki Kaoru (Tokyo JPX) Morita Keizo (Tokyo JPX), Magnetic rotary encoder for detection of incremental angular displacement.
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Narimatsu Akihisa (Naka JPX) Ohkubo Hiroyuki (Chiba JPX), Magnetoresistive displacement sensor and signal reprocessing circuits therefor.
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Radtke Ernst-Rudolf (Erlensee DEX), Position sensor.
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Amemiya, Yoichi; Ishida, Hiroshi; Takekoshi, Yashitaka; Ushiyama, Shigeyuki, Pulse coder using magnetoresistance elements having an improved z-phase signal pattern.
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Sawada Takeshi (Yokohama JPX) Yoneda Kou (Kawasaki JPX) Shinmi Akira (Kawasaki JPX) Takagi Hiroshi (Kawasaki JPX) Abiko Shuzo (Chichibu JPX) Goto Hirokazu (Tokyo JPX), Temperature compensated magnetoresistive effect thin film magnetic sensor.
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이 특허를 인용한 특허 (10)

Feurer,Georg, Angle-measuring system having irregular reference mark that is dedicated without time delay.
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Sugiyama, Yasushi; Nikamoto, Hiroyuki; Ota, Takashi; Wakabayashi, Junichi, Annular magnetic encoder having pole arrangement that specifies rotational angle.
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Konradi, Johann; Bürkle, Jörg, Arrangement for determining the angular position of a shaft of an electric motor, and windscreen wiper motor with an arrangement for determining the angular position.
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Konradi, Johann; Bürkle, Jörg, Arrangement for determining the angular position of a shaft of an electric motor, and windscreen wiper motor with an arrangement for determining the angular position.
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Takahashi, Toru; Ueno, Shintarou; Desbiolles, Pascal; Peterschmitt, Cyril, Magnetic encoder.
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Eisschiel Heinz,ATX ; Vasiloiu Victor,ATX, Magnetic position measuring device using a plurality of sensors and a scale.
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Iijima Kenzaburou (Shizuoka JPX) Hayashi Yoshinori (Shizuoka JPX) Nishimura Seiya (Shizuoka JPX), Magnetic recording medium for displacement detectors.
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Santos A. John ; LaCroix Mark E. ; Desbiolles Pascal,FRX, Method of determining position and/or direction of a magnetic target.
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Katsuya Kogiso JP; Yasushi Nishibe JP; Masahiro Taniguchi JP; Shinji Usui JP, Rotation detector having a plurality of magnetism detection elements, a plurality of magnetic resistors which are able to switch the resistance from great to small and vice-versa.
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Lohberg, Peter; Rink, Klaus, Sensor arrangement for the precise detection of relative movements between an encoder and a sensor.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Encoder unit using magnetoresistance effect element 원문보기