公开(公告)号：EP0237765B1

公开(公告)日：1991-09-11

申请号：EP87101774.5

申请日：1987-02-09

申请人： HITACHI, LTD.

发明人： Kobayashi, Sumio ,  Tokashiki, Mutsuo ,  Tomita, Hiroyuki ,  Okawa, Tadashi ,  Sugai, Hiromi

IPC分类号： G01P3/46

CPC分类号： G01P3/46

公开(公告)号：EP0237765A3

公开(公告)日：1989-07-19

申请号：EP87101774.5

申请日：1987-02-09

申请人： HITACHI, LTD.

发明人： Kobayashi, Sumio ,  Tokashiki, Mutsuo ,  Tomita, Hiroyuki ,  Okawa, Tadashi ,  Sugai, Hiromi

IPC分类号： G01P3/46

CPC分类号： G01P3/46

摘要： A signal whose frequency is proportional to a rotational speed of a rotor (110) and whose rising and falling angles near points crossing zero becomes larger with the rotational speed of the rotor is used to produce a first signal (V1) of amplitude corresponding to the rising and falling angles and a second signal (V2) of amplitude corresponding to the frequency, a difference between the first and second signals is evaluated, and the first and second signals (V1, V2) are corrected with the difference.

公开(公告)号：EP0237765A2

公开(公告)日：1987-09-23

申请号：EP87101774.5

申请日：1987-02-09

申请人： HITACHI, LTD.

发明人： Kobayashi, Sumio ,  Tokashiki, Mutsuo ,  Tomita, Hiroyuki ,  Okawa, Tadashi ,  Sugai, Hiromi

IPC分类号： G01P3/46

CPC分类号： G01P3/46

摘要： A signal whose frequency is proportional to a rotational speed of a rotor (110) and whose rising and falling angles near points crossing zero becomes larger with the rotational speed of the rotor is used to produce a first signal (V1) of amplitude corresponding to the rising and falling angles and a second signal (V2) of amplitude corresponding to the frequency, a difference between the first and second signals is evaluated, and the first and second signals (V1, V2) are corrected with the difference.