Title:
保証質量支持システム
Document Type and Number:
Japanese Patent JP4212125
Kind Code:
B2
Abstract:
A proof mass support system comprising a pair of alignment coils (42,42',44,44') for controlling the rest position of an elongate proof mass (3,4). The alignment coils are constructed to provide a levitation force when they carry electric currents which varies along the length of the proof mass (3,4). Means are provided for tuning the relative strength of the electric currents in the alignment coils to cause the proof mass to take up a predetermined orientation with respect to one or more degrees of freedom defined by the alignment coils. In an alternative, one or more anti-rotation coils (46,51,49,50) may be arranged to apply a restoring force to the proof mass when electric currents pass through it; wherein the proof mass is formed so as to cooperate with the restoring force which acts against rotation of the proof mass away from a predetermined orientation. The system is typically provided as part of a superconducing accelerometer or gravity gradiometer.
Inventors:
John Morris Lambley
Ho Jung Pike
Ho Jung Pike
Application Number:
JP10894295A
Publication Date:
January 21, 2009
Filing Date:
March 29, 1995
Export Citation:
Assignee:
Oxford Instruments Super Conductivity Limited
Ho Jung Pike
Ho Jung Pike
International Classes:
G01C9/06; G01P15/08; G01C9/14; G01P15/11; G01P15/13; G01P15/18; G01V7/00
Domestic Patent References:
| JP5491283A | ||||
| JP63317776A |
Foreign References:
| US4841772 |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Nobuo Ogawa
Fumiaki Otsuka
Shishido Kaichi
Nobuo Ogawa