Study of Measurement Technology of DC Currents Based on Magnetic Field Detection
The current intensity of a circuit can be measured indirectly by measuring the magnetic field.In order to reduce the interference of the ambient magnetic field,a measurement scheme using two sensors was proposed to reduce the influence of the ambient magnetic field based on the fluxgate magnetometer.The two fluxgate sensors were installed in the appropriate posi-tions according to the specific postures.Through experimental testing,it was found that the current intensity to be measured and the difference of the magnetic fields measured by the two sensors show a good linear relationship,thus the current intensity can be calculated from the magnetic field measurement results of the two sensors.The test shows that the measurement scheme can effec-tively eliminate the interference of the ambient magnetic field to the current intensity measurement,and is expected to further im-prove the accuracy of the current measurement.
NETL
NSTL
万方数据
维普
