IMF2017

In this paper, a probe that is sensitive to an external magnetic field was characterized and developed. This probe sensor was made with rectangular polarized piezoelectric ceramic elements and a copper wire coil located around it, which induces an alternating electrical response. The system consists in a probe coupled to a microprocessor and a signal conditioning system with Wi-Fi technology, integrated with a smartphone application for magnetic field sensing in real-time. The operation principle of this sensor involves the Lorentz force and the direct piezoelectric effect. The basic principle of this probe is when a continuous magnetic field (HDC) is applied to the sensor, a Lorentz force is established due the interaction between magnetic field and electric current. This force transfers energy to the piezoelectric element, which promotes a mechanical deformation that is converted into electric voltage via direct piezoelectric effect. The Electric response voltage induces the linear output response of HDC between 0 and 1 kOe, with an excitation current in the coil of 100 mA. These sensors showed ability to measure magnetic fields of the order of 10 - 4 T, leading to the development of smart sensors for several applications. It can be used with magnetic transducers that are widely used in modern industry and electronic applications to sense the magnetic field, measuring current, position, and other physical parameters. To conclude, those innovations in magnetic field sensor probes are important for the development of new smart technologies with applications in current control and measuring in switching power supplies for industrial automation