Current measurement device

A current measurement device, comprising N different positions, wherein each position is provided with at least two magneto-resistors, N being greater than or equal to 3;

• the two magneto-resistors at the same position comprise a magneto-resistor with a first sensitive direction and a magneto-resistor with a second sensitive direction, the first sensitive direction and the second sensitive direction are opposite, and the resistance value of the magneto-resistor, within a set range, has a linear relationship with the magnetic field at the position where the magneto-resistor is located;
• the sensitive directions of all the magneto-resistors at the N different positions are the same or opposite, and the magnetic field to be measured has a respective component in the sensitive direction at each of the N different positions;
• the magnitude of the component, in the sensitive direction, of the magnetic field to be measured at least one of the N positions differs from the magnitude of the component, in the sensitive direction, of the magnetic field to be measured at each of the remaining positions;
• and
• all the magneto-resistors are electrically connected to form a resistor network, an output signal of the resistor network comprises the signal of the magnetic field to be measured and comprises an interference magnetic field signal having an intensity less than a first preset threshold intensity, wherein the first preset threshold intensity is a minimum intensity value below which the interference magnetic field signal is considered negligible, and the interference magnetic field signal comprises at least one of a uniform interference magnetic field component or a gradient interference magnetic field component.