A New Calibrating and Compensating Method for the Nonorthogonality of Three-Axis Magnetic Sensor

摘要

Three-axis magnetic sensor has been widely applied in magnetic measurements. However limited to the current technological level of processing and installing, the orthogonality of the three axes in magnetic sensors cannot be guaranteed, which will reduce the measuring accuracy. Therefore, calibration and compensation for magnetic sensors become necessary in engineering. Though some methods have come out to measure the errors of perpendicularity, some relatively rigorous device requirements or assumptions are required. Therefore, it is necessary to do some further researches on the calibrating and compensating method for the nonorthogonality of three-axis magnetic sensor according to the practical requirements. This paper proposes a new calibrating and compensating method for the nonorthogonality of three-axis magnetic sensor, which is free of the requirements on the magnetic field accuracy of the testing environment and the measuring accuracy of the sensor. Moreover, the real angles between two magnetic axes can be calculated by using accessible measurements, whose precision depends on the precision of the turntable.