Electricity: measuring and testing – Magnetic – Displacement
Patent
1998-01-20
2000-04-25
Strecker, Gerard
Electricity: measuring and testing
Magnetic
Displacement
32420724, 336 45, 34087032, 341 15, G01B 702, G01B 714, G01D 520, H03M 122
Patent
active
060548517
ABSTRACT:
A high-accuracy inductive absolute position transducer system has two members movable relative to each other and includes a code track transducer and may include a fine track transducer. The code track transducers includes a code track transmitter winding and at least one set of code track receiver windings. Each set of code track receiver windings includes n balanced pairs. Each balanced pair extends along the measuring axis and includes a positive polarity winding and a negative polarity winding. A code track has a plurality of flux modulator zones distributed along the measuring axis. Flux modulators are formed in at least some of the flux modulator zones. A signal generating and processing circuit is connected to the transmitter winding and each balanced pair. The code track transmitter winding and each balanced pair form an inductive coupling. The flux modulators modulate the inductive coupling between each balanced pair and the code track transmitter winding based on the relative position between the read head member and the scale member. The flux modulators are distributed along the measuring axis such that each pair of adjacent flux modulator zones forms one of a set of output states in an overlying balanced pair. The pairs of adjacent flux modulator zones form a series of code elements extending along the measuring axis such that each set of m adjacent code elements forms a unique codeword. Each unique codeword defines an absolute position of the read head member relative to the scale member to a first resolution.
REFERENCES:
patent: 4009377 (1977-02-01), Elms
patent: 4014015 (1977-03-01), Gundlach
patent: 4350883 (1982-09-01), Lagarde
patent: 4410798 (1983-10-01), Breslow
patent: 4628298 (1986-12-01), Hafle et al.
patent: 4697144 (1987-09-01), Howbrook
patent: 4725777 (1988-02-01), Tousch
patent: 4737698 (1988-04-01), McMullin et al.
patent: 4743786 (1988-05-01), Ichikawa et al.
patent: 4833919 (1989-05-01), Saito et al.
patent: 4853604 (1989-08-01), McMullin et al.
patent: 4879508 (1989-11-01), Andermo
patent: 4883949 (1989-11-01), Kokubo et al.
patent: 4893077 (1990-01-01), Auchterlonie
patent: 4914437 (1990-04-01), Kibrick et al.
patent: 4970387 (1990-11-01), Kubo et al.
patent: 4985691 (1991-01-01), Pulyer et al.
patent: 5012238 (1991-04-01), Hayashi et al.
patent: 5023559 (1991-06-01), Andermo
patent: 5027526 (1991-07-01), Crane
patent: 5049879 (1991-09-01), Symonds
patent: 5117105 (1992-05-01), Nagase et al.
patent: 5173693 (1992-12-01), Fry
patent: 5233294 (1993-08-01), Dreoni
patent: 5279044 (1994-01-01), Bremer
patent: 5293031 (1994-03-01), Goto et al.
patent: 5438330 (1995-08-01), Yamazaki et al.
patent: 5444613 (1995-08-01), Tani et al.
patent: 5739775 (1998-04-01), Brandestini
Andermo Nils Ingvar
Atherton Kim W.
Masreliez Karl G.
Mitutoyo Corporation
Strecker Gerard
LandOfFree
Induced current absolute position transducer method using a code does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Induced current absolute position transducer method using a code, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Induced current absolute position transducer method using a code will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-996139