Electricity: measuring and testing – Magnetic – Displacement
Patent
1988-03-31
1990-01-09
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
Displacement
324262, 324233, 34087031, 318656, G01B 714, G05B 106, G08C 1906, G08C 1912
Patent
active
048930776
ABSTRACT:
For enabling a resolver to have absolute position sensing over a wide displacement range while still obtaining the resolution, accuracy and precision obtainable by operation in an incremental mode, the resolver is provided with a number of terminals for providing offset pitch phase indications as a function of position. A microcomputer is programmed to execute a decoding procedure for reading the offset pitch phase indications and from them computing the absolute position. This method is applicable to linear as well as rotary position sensing. By using multiplexing, digital signal processing and large-scale circuit integration for interfacing the resolver to the microcomputer, the method can achieve absolute position sensing with high reliability and low cost. The offset pitch phase indications are readily provided by inductive coupling between a multiplicity of windings, including a set of offset pitch windings connected to the terminals. A phase indicating signal is picked up using either a relatively moving pick-up device or a stationary coil linked by a ferromagnetic core. A radio-frequency powered modulator is provided for wireless transmission of the phase indicating signal from the moving pick-up device. The offset pitch windings are formed by photolithography on a plurality of laminations or layers, or by winding coils in proper registration, for example, on a multi-layer, multi-pitch coil form.
REFERENCES:
patent: 2650352 (1953-08-01), Childs
patent: 2671892 (1954-03-01), Childs
patent: 2740935 (1956-04-01), Statsinger
patent: 2769969 (1956-11-01), Comstock
patent: 2799835 (1957-07-01), Tripp et al.
patent: 2867783 (1959-01-01), Childs
patent: 2911632 (1959-11-01), Levine et al.
patent: 2915722 (1959-12-01), Foster
patent: 2924798 (1960-02-01), Foster
patent: 2988697 (1961-06-01), Hirsch
patent: 3011119 (1961-11-01), Starks-Field et al.
patent: 3064218 (1962-11-01), Farrand
patent: 3090934 (1963-05-01), Farrand
patent: 3138772 (1964-06-01), Persons, Jr.
patent: 3202948 (1965-08-01), Farrand
patent: 3281655 (1966-10-01), Blasingame
patent: 3441888 (1969-04-01), Farrand
patent: 3493955 (1965-03-01), Minasy
patent: 3641467 (1972-02-01), Ringland et al.
patent: 3673584 (1972-06-01), Farrand
patent: 4005396 (1977-01-01), Fujiwara et al.
patent: 4134065 (1979-01-01), Bauer et al.
patent: 4282485 (1981-08-01), Pauwels et al.
patent: 4504832 (1985-03-01), Conte
patent: 4604575 (1986-08-01), Shimizu et al.
patent: 4634950 (1987-01-01), Klatt
patent: 4644355 (1987-02-01), Russell
patent: 4644432 (1987-02-01), Heim
N. C. Gray, "Simplifing LVDT Signal Conditioning", Machine Design, May 7, 1987, pp. 103-106.
R. Zimmerman, "Resolvers as Velocity and Position Encoding Devices," PCIM, Sep. 1986, pp. 47-50, 52, 54.
D. Overcash, "Selecting the Proper Position Sensor," Control Engineering, Sep. 1986, pp. 294-302.
Auchterlonie Richard C.
Eisenzopf Reinhard J.
Snow Walter E.
LandOfFree
Absolute position sensor having multi-layer windings of differen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Absolute position sensor having multi-layer windings of differen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute position sensor having multi-layer windings of differen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-147112