Patent ID: 10473449

Abstract:
A single-chip off-axis magnetoresistive Z-X angle sensor and measuring instrument. The single-chip off-axis magnetoresistive Z-X angle sensor comprises a substrate located on an X-Y plane, at least one X-axis magnetoresistive sensor and at least one Z-axis magnetoresistive sensor, the X-axis magnetoresistive sensor and the Z-axis magnetoresistive sensor being located on the substrate. The X-axis magnetoresistive sensor and the Z-axis magnetoresistive sensor each comprise magnetoresistive sensing units and a flux concentrator, the magnetoresistive sensing units being electrically connected into a magnetoresistive bridge comprising at least two bridge arms. The Z-axis magnetoresistive sensor is a push-pull bridge structure, a push arm and a pull arm of the push-pull bridge structure being respectively located at positions equidistant from a Y-axis central line of the flux concentrator. The X-axis magnetoresistive sensor is a reference bridge structure, a reference arm and a sensitive arm of the reference bridge structure being respectively located on the Y-axis central line of the flux concentrator and a position more than half of the width of the flux concentrator away from the Y-axis central line. The single-chip off-axis magnetoresistive Z-X angle sensor is placed at an edge of a circular permanent magnet encoding disc and forms an angle measuring instrument. Angle measurement is achieved by measuring X-axis and Z-axis magnetic field components, the structure is compact and sensitivity is high.