flux gate transducer
A flux gate transducer is a sophisticated electromagnetic sensing device that operates on the principle of magnetic saturation to measure DC magnetic fields and current. This innovative device consists of a high-permeability magnetic core, typically made from materials like permalloy or mu-metal, wrapped with two sets of coils: an excitation coil and a sensing coil. The excitation coil receives an alternating current that drives the core through its hysteresis loop, while the sensing coil detects changes in the magnetic flux. When exposed to an external magnetic field, the core's saturation becomes asymmetrical, producing a secondary harmonic in the sensing coil that is proportional to the field strength. This technology enables precise measurements of magnetic fields and currents with exceptional accuracy and stability. Flux gate transducers find extensive applications in various fields, including geomagnetic surveys, navigation systems, current measurement in power systems, and non-destructive testing. Their ability to detect weak magnetic fields while maintaining excellent linearity and temperature stability makes them invaluable in both industrial and scientific applications. The device's robust construction and reliable performance have made it a standard tool in magnetic field measurement, particularly in environments requiring high precision and long-term stability.