Error correction method of fluxgate sensor for cable positioning

The invention discloses an error correction method of a fluxgate sensor for cable positioning. The error correction method comprises the following steps of modeling a sensor error, simplifying a model, and changing the attitude of the fluxgate sensor to acquire magnetic field data, averaging the measurement data to obtain a total magnetic field reference value, solving an optimal parameter of an error model by combining the acquired magnetic field data and the total magnetic field reference value and using a multivariate function extremum solving method to obtain an error correction model of acertain sensor, and when the cable is positioned, inversing a real magnetic field value by combining the magnetic field value obtained by the sensor and the error correction model. According to the method, other sensors with higher precision do not need to give reference values, the error correction model and parameters of the same sensor do not need to be changed, and the universality of the model is good. The sensor er