Magnetic sensing device and magnetic sensing method

A magnetic sensing method for determining a distance or a speed or an angle of movement and a direction of movement of a relative motion between a magnetic sensing device and an object, the magnetic sensing device and the object having a relative motion relationship along the direction of movement, the object having a magnetic field to be measured thereon, wherein the magnetic sensing device employs a magnetic sensing device, the magnetic sensing device having a relative motion relationship with an object in a direction of movement, the object having a magnetic field to be measured thereon, the magnetic sensing device configured to sense a distance or a speed or an angle of movement and the direction of movement of the relative motion, the magnetic sensing device comprising:

• a substrate having a supporting surface being parallel to the direction of movement on which a first sensing area, a third sensing area, and a second sensing area are consecutively arranged in the direction of movement, the first sensing area, the second sensing area, and the third sensing area respectively provided with a first midline, a second midline, and a third midline in the direction of movement, the first midline, the second midline, and the third midline respectively passing through midpoints of projection lengths of the first sensing area, the second sensing area, and the third sensing area in the direction of movement and being perpendicular to the direction of movement, and the first midline and the second midline being symmetrical with respect to the third midline;
• wherein the first sensing area and the second sensing area are jointly configured to output a first output signal, the third sensing area is configured to output a second output signal, and a phase difference between the first output signal and the second output signal is 90 degrees, and the first output signal and the second output signal are jointly configured to determine the distance or the speed or the angle of movement and the direction of movement of the relative motion,
• wherein each of the first sensing area and the second sensing area includes a first sensing cell, each of the first sensing cells has a midline in the direction of movement, the midline of the first sensing cell of the first sensing area coincides with the first midline of the first sensing area, and the midline of the first sensing cell of the second sensing area coincides with the second midline of the second sensing area, the two first sensing cells produce changes with equal numerical values and same directions for a same magnetic field to be measured, the two first sensing cells are connected in series into a half-bridge structure to form a first sensor, and a connection point between the two first sensing cells outputs a first sensing signal, the first sensing signal is configured to generate the first output signal;
• and wherein the magnetic sensing method comprises:
• acquiring a first output signal jointly by a first sensing area and a second sensing area, acquiring a second output signal by a third sensing area, wherein a phase difference between the first output signal and the second output signal is 90 degrees, and determining the distance or the speed or the angle of movement and the direction of movement of the relative motion according to the first output signal and the second output signal.