This chapter addresses smart sensor systems. In recent years, goods identification technology using a soft magnetic barcode, radio frequency identification, and automated wheelchair guidance technology using a magnetic field usable in dirty environments as part of Robotics and Mechatronics are becoming important in many areas, such as factories, physical distribution, office, security, etc. These identification and guidance technologies are based on sensing of magnetic field. Therefore, smart magnetic sensing technologies suitable for these identification and guidance techniques are described in this chapter.
