Title:
【発明の名称】位置あるいは速度検出装置
Document Type and Number:
Japanese Patent JP2574873
Kind Code:
B2
Abstract:
Sine wave signals generated from a position detector (3) are used as analog values to detect a fine position of a rotating or moving body, a rise or fall edge of the sine wave signal is used to detect a coarse position of the rotating or moving body, and the position or speed of the rotating or moving body is detected based on a signal indicative of the detected coarse position when the rotating or moving body is at high speed and based on a signal indicative of the detected fine position when the rotating or moving body is at low speed to thereby optimal control from high speed to low speed. Especially at extremely low driving, speed detection with superhigh resolution is effected using the analog value to decrease an uneven rotation of the rotating body.
Inventors:
SUGIURA YASUYUKI
ONOE TOSHIKA
MYASHITA KUNIO
NAGASE HIROSHI
MUTO NOBUYOSHI
KOBAYASHI SUMIO
SUGAI HIROSHI
ONOE TOSHIKA
MYASHITA KUNIO
NAGASE HIROSHI
MUTO NOBUYOSHI
KOBAYASHI SUMIO
SUGAI HIROSHI
Application Number:
JP20839988A
Publication Date:
January 22, 1997
Filing Date:
August 24, 1988
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G01P3/481; G01D5/244; G01D5/245; G01D5/246; G01P3/42; G01P3/44; G01P3/489; G05D3/12; (IPC1-7): G01D5/245; G01P3/42; G01P3/489
Domestic Patent References:
| JP60100718A | ||||
| JP60216262A | ||||
| JP62257065A |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)