Study on Linearity of Time Difference Flux Gate Sensor under Different Incentives

With the vigorous development of modern high-end precision instrument technology, the accuracy and efficiency of automatic testing systems are experiencing unprecedented improvements. The foundation of this technological advancement is deeply rooted in the collaborative development of multiple fields, including the continuous optimization of sensor technology and the continuous innovation of intelligent control technology. Every leap in these fields has laid a solid foundation for building more accurate and efficient automatic testing systems. Flux gate sensor is a highly sensitive magnetic field measurement device widely used in industries, automobiles, medical and scientific research fields. The basic principle is to rely on a pair of materials with high magnetic permeability to perceive the magnetic field by the change in magnetic flux generated under the action of an external magnetic field. This article uses triangular wave excitation and sine wave excitation. The saturation current of the magnetic core is amplified by a differential amplifier circuit and the data is read by an oscilloscope. The time difference is calculated by programming in LabVIEW to explore the linearity of the measured magnetic field and time difference of the time difference type flux gate.