Magnetic absolute encoder

• Main Authors: AYUZAWA, TOSHIAKI, YAMAZAKI, TOMOHITO, KATOU, SHIGEHARU, ITO, SHOJI, MIYAJIMA, TOORU, MATSUDA, MASATO, MAKIUCHI, KAZUHIRO
• Format: Patent
• Language: English; French; German
• Published: 05.02.2014
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

A magnetic absolute encoder with enhanced resolution is provided. A first cycle determining section 27 utilizes data stored in a fourth angle data storing section 23 to determine in which cycle of m cycles of the fourth angle data, fifth angle data, which has been newly computed in response to rotation of a rotary shaft 1, occurs. A second cycle determining section 29 determines in which cycle of n cycles of first angle data that occur in first determined cycle, the newly computed fifth angle data occurs. A third cycle determining section 31 determines in which cycle of N1 cycles of the first angle data, the current first angle data occurs, based on the first determined cycle and second determined cycle. An absolute position determining section 33 determines the absolute position based on third determined cycle and the digital value of the current first angle data.