Geomagnetic sensor device and digital compass with the same
AssigneeSAE Magnetics (H.K.) Ltd.
InventorsMinggao Yao, Yamanoi Koyu
Life of this patent
Estimating the term…
Abstract
A geomagnetic sensor device comprises a first geomagnetic sensor comprising a first Wheatstone bridge circuit and a second Wheatstone bridge circuit which are arranged in the same horizontal coordinate system, and a second geomagnetic sensor comprising a third Wheatstone bridge circuit and a fourth Wheatstone bridge circuit which are arranged in the same vertical coordinate system. Each of the Wheatstone bridge circuits comprises at least four magnetoresistive elements connecting and having power input terminals and signal output terminals. The present invention can obtains a stable and high output signal and achieves high measurement accuracy for the geomagnetic azimuth angle. The present invention also discloses a digital compass.
Claims12
A geomagnetic sensor device, comprising:
- a first geomagnetic sensor comprising a first Wheatstone bridge circuit and a second Wheatstone bridge circuit which are arranged in the same horizontal coordinate system, and
- a second geomagnetic sensor comprising a third Wheatstone bridge circuit and a fourth Wheatstone bridge circuit which are arranged in the same vertical coordinate system;
- wherein each of the Wheatstone bridge circuits comprises at least four magnetoresistive elements connecting, a pair of power input terminals and a pair of signal output terminals.
A digital compass, comprising a geomagnetic sensor device, wherein the geomagnetic sensor device comprising:
- a first geomagnetic sensor comprising a first Wheatstone bridge circuit and a second Wheatstone bridge circuit which are arranged in the same horizontal coordinate system, and
- a second geomagnetic sensor comprising a third Wheatstone bridge circuit and a fourth Wheatstone bridge circuit which are arranged in the same vertical coordinate system;
- wherein each of the Wheatstone bridge circuit comprises at least four magnetoresistive elements connecting, a pair of power input terminals and a pair of signal output terminals.
Dependencies are inferred from the claim text.