发明名称 |
Rotating speed measuring apparatus having a corrector for low and high speeds using angle and frequency transducers |
摘要 |
A signal whose frequency is proportional to a rotational speed of a rotor 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 of amplitude corresponding to the rising and falling angles and a second signal of amplitude corresponding to the frequency, a difference between the first and second signals is evaluated, and the first or second signals are corrected with the difference.
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申请公布号 |
US4808933(A) |
申请公布日期 |
1989.02.28 |
申请号 |
US19870013545 |
申请日期 |
1987.02.11 |
申请人 |
HITACHI, LTD. |
发明人 |
KOBAYASHI, SUMIO;TOKASHIKI, MUTSUO;TOMITA, HIROYUKI;OKAWA, TADASHI;SUGAI, HIROSHI |
分类号 |
G01P3/42;G01P3/46;(IPC1-7):G01P3/44;G01P3/56 |
主分类号 |
G01P3/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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