Sensor assembly

Details Sensor assembly Sensor assembly

1995-10-13

1998-02-17

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324252, G01R 3300, G01R 3302

Patent

active

057194947

ABSTRACT:
A sensor assembly for measuring current I.sub.o is disclosed. The sensor assembly includes four magnetoresistive resistors (1, 2, 3, 4) arranged to form a Wheatstone bridge. The bridge is disposed over a U shaped conductor 14. The resistors are arranged so that two resistors (1,2) forming one bridge branch are disposed over one leg of the conductor and the two resistors (3,4) forming the other bridge branch are disposed over the other leg of the conductor. Each resistor is formed out of a number of magnetoresistive strips (1', 2', 3', 4'). The magnetoresistive strips forming the individual bridge branch resistors are interleaved so as to ensure the resistors forming each bridge branch have substantially the same temperature. When current I.sub.o is applied to the conductor, the equal and opposite magnetic fields that develop around the individual bridge branches cause the Wheatstone bridge to produce a signal U.sub.a that is a function of the current.

REFERENCES:
patent: 3820089 (1974-06-01), Lama
patent: 4385273 (1983-05-01), Lienhard et al.
patent: 4464625 (1984-08-01), Lienhard et al.
patent: 4712064 (1987-12-01), Eckardt et al.
patent: 4835510 (1989-05-01), Shibasaki et al.
patent: 5049809 (1991-09-01), Wakatsuki et al.
patent: 5055786 (1991-10-01), Wakatsuki et al.
patent: 5140267 (1992-08-01), Shintaku
patent: 5247278 (1993-09-01), Pant et al.
patent: 5351027 (1994-09-01), Kawamata et al.
patent: 5521501 (1996-05-01), Dettmann et al.
patent: 5561368 (1996-10-01), Dovek et al.
patent: 5585775 (1996-12-01), Ishishita
Patent Abstracts of Japan, English language abstract for JP 59158575, published Aug. 1984, 1 page.
Sensors and Actuators; Proceedings of Eurosensors VI, Jun.-Aug., 1993, vol. 2, 2 pages.
Current Measurements Based on Thin-Film Magnetoresistive Sensors; Sensors and Actuators A, 37-38 (1993), pp. 461-465, Andrae, Kuehn and Pertsch Jun.-Aug. 1993.
New Magnetoresistive Sensors: Engineering and Applications; Sensors and Actuators A27 (1991) May, Nos. 1-3, pp. 763-766, Rottmann and Dettmann.
Les Capteurs Magnetiques; 2429 Electronique Radio Plans, (1990) May, No. 510, pp. 19-26.
A Monolithic Superminiature Magnetoresistive Sensor; 298 NEC Research & Development (1989) Apr., No. 93, p. 11-15, Konno, Kataniwa, Takado, Inui, Takanashi, Sagara, et al.
Current Sensor as a Microsystem, Jurgen Ruhl and Thomas Walther (4 pages) Mon. and Year are not Available.
Stromsensor Als Mikrosystem; 2087 Elektronik 42 (1993) Oct., No. 20, 3 pages, Ruehl and Walther.

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