3-Axis Magnetic Field Sensor

Wireless power transfer systems are well on their way to replacing conventional wired charging. Ranging from tiny biomedical implants all the way to wirelessly recharging huge electric vehicles. An integral part of the research on wireless power is minimizing the magnetic field density. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) provides scientific advice and guidance on the health and environmental effects of non-ionizing radiation (NIR) to protect people and the environment from detrimental NIR exposure. NIR refers to electromagnetic radiation such as ultraviolet, light, infrared, and radiowaves, and mechanical waves such as infra- and ultrasound. Wireless charging systems produce alternating magnetic fields which could be harmful for human beings and animals present in the vicinity. To be able to detect these fields and minimize them in a real-world test setup, a magnetic field measuring device like the Aaronia SPECTRAN NF-5035 Spectral Analyzer are required. These devices usually cost upwards of $2000 and are bulky and may not be able to reach narrow spaces where the field needs to be measured. Additionally, these devices usually have more features than required for simple field measurement in wireless power transfer systems. Hence, developing a smaller, cheaper version of the field measuring devices would be of great value.
The current project involves the design of a PCB for magnetic field sensing and also the design of an additional device that can process the sensed magnetic field values and display them on an OLED or LCD display.”


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