Electricity: measuring and testing – Magnetic – Displacement
Patent
1987-05-28
1990-01-09
Strecker, Gerald R.
Electricity: measuring and testing
Magnetic
Displacement
318660, 336 45, 336115, 336129, 336136, 34087032, G01B 714, G08C 1906, H01F 2102, H02K 2400
Patent
active
048930784
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 of 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.
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
N. C. Gray, "Simplifying 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.
"LVDT and RVDT Linear and Angular Displacement Transducers," Tech. Bulletins 1002D, 2M 9/85 PIP, 1101, MP-5M-5/85, 13 pages.
Auchterlonie Richard
Strecker Gerald R.
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