Magnetic sensor and state detection device

The invention discloses a magnetic sensor and a state detection device, and the magnetic sensor comprises a substrate which comprises a bearing surface; the first sensing assembly, the second sensing assembly, the third sensing assembly and the fourth sensing assembly are respectively arranged at a first position, a second position, a third position and a fourth position; the first sensing assembly and the third sensing assembly respectively comprise two sensing elements which are arranged at an interval along a first direction, and the second sensing assembly and the fourth sensing assembly respectively comprise two sensing elements which are arranged at an interval along a second direction; a convex polygon formed by connecting the first position, the second position, the third position and the fourth position is centrosymmetric relative to the geometric center of the bearing surface; and a first included angle is formed between the first direction and the second direction. According to the magnetic sensor