Visualization of Magnetic Sensor Signal and its Application
Tatsuya Yamashita, Seiji Hayano, Yoshifuru SAITO, Kiyoshi HORII · Journal of the Visualization Society of Japan · 2004
In recent years, wide spreading use of microprocessors changes various apparatus as well as instruments into the smart functional products, dramatically. Even if the most high performance microprocessors and high speed memory is exploited; it is essential to exploit the high performance sensors which give original information of the computer instructions.High sensibility, toughness to the mechanical and environmental conditions such as stress, temperature and humidity are required to any types of sensors.Magnetic sensor is classified into two major categories. One is the semiconductor type, e.g. Hall sensor, and the other is sensing or picking up coil type. As is well known fact any types of semiconductor elements are greatly dominated by environmental temperature, and also depended on the mechanical stress. On the other side, sensing or picking up coil type magnetic sensor has reasonable tough properties to the mechanical and environmental conditions, even though they do not have high sensibility.In the present paper, we propose two types of magnetic sensors in order to sense the metallic materials. Our magnetic sensors belong to the sensing or picking up coil type, and are further classified into active and passive types. Proto type of these sensors is exploited and initial experiment is carried out.