All commercial sensors are relatively cheap, however bring one of the biggest disadvantages - electrical wiring. RVmagnetics presents a unique magnetic sensor—MicroWire. With dimensions in the micrometer range, MicroWire is a local sensor capable of monitoring surrounding magnetic fields.
Thanks to its microscopic size, MicroWire can be embedded in materials, unlocking new applications. As a passive sensor, it detects signals from up to 10 cm away, providing data on surrounding magnetic fields. It serves as both a simple binary sensor for on/off detection and a tool for complex DC/AC magnetic field monitoring, including amplitude, polarity, and frequency. MicroWire enables a wide range of magnetic field monitoring applications.
Due to its high sensitivity, MicroWire can even detect Earth's magnetic field, making it useful for advanced applications such as navigation in aviation. Additionally, it can monitor transformer health and performance by detecting changes in magnetic fields.
A magnetic probe can be developed using MicroWire technology for precise magnetic field monitoring in manufacturing processes. When connected to a small portable device, it provides a compact and efficient solution. This probe enables the detection of micro non-magnetic inclusions in metal sheets by identifying local changes in magnetic properties. Its advanced sensing capabilities open possibilities for even more applications.
Non-invasive magnetic field sensing with Seamless Integration & Real-Time Monitoring
Magnetically Bistable MicroWires: Properties and Applications for Magnetic Field, Temperature, and Stress Sensing
R. Varga, P. Klein, R. Sabol, K. Richter, R. Hudak, I. Polaček, D. Praslička, M. Šmelko, J. Hudak, I. Mikita, G. A. Badini-Confalonieri, R. El Kammouni, M. Vazquez
Amorphous glass-coated microwires with positive magnetostriction are characterized by the magnetic bistability where the switching between the two stable magnetic states appears at the switching field. The switching field is sensitive to the external parameters like magnetic field, temperature, mechanical stress, etc., which gives us possibility to employ the microwires as a miniaturized sensing elements for the mentioned parameters. Apart from this, there are many other advantages of microwires: the small dimensions (which allows them to be introduced inside various materials), glass-coating (that provides biocompatibility and protection against chemically aggressive environment), magnetic nature (for contactless sensing), simple production process (that allows very efficient production of large amount of wires in a short time), and many more favorable properties. Within this chapter an overview of various parameters that affect the switching field of bistable microwires is given. Four different possibilities to use bistable microwires as sensors are shown: sensors of magnetic field, wide-range temperature sensors, selected temperature sensors for biomedical applications as well as stress sensor. At the end of each section, real applications of such sensors are demonstrated.
MicroWire creates a unique signal thanks to its magnetic and amorphous nature. With MicroWire, the sensing system, and software provided by RVmagnetics, the change in the magnetic field in the vicinity of the MicroWire creates the change in its response, providing the calibrated information of physical quantities to the user.
Conclusion:
With the unique solution that the magnetic passive MicroWire sensor provides, the need for measurement for amplitude, polarity, and even frequency without any wiring are problems of the past. With the dedicated software, the information provided by the MicroWire sensor can be available to a user 24/7 and even from the inside of the materials.