Glory Kogyo Kabushiki Kaisha

Toru Nakashima

Seishi Naito

Sadatoshi Kusatani

Shuji Tanabe

Primary and secondary coils are wound on a differential type magnetic head, and a low frequency signal is applied on the primary coil. Based on the difference between the output voltages from the head when an object of detection is placed near the magnetic head on the detection side and the output voltage therefrom when an object is not placed near the magnetic head, the magnetization characteristic curve of the magnetic flux and the magnetic field is calculated. Since the magnetization characteristic detection is determined by dividing a magnetic flux by the measured area cross section, once the magnetic flux is determined, a general B-H curve can be simply calculated. The magnetization characteristic measurement device includes a differential type magnetic head portion having plural differential type magnetic heads in linear arrangement which is positioned on or near the magnetic thin film of a detection object. The device can calculate magnetization characteristics of the magnetic thin film by applying a low frequency signal on the magnetic head, successively switching differential output voltages given to a cancellation core of the plural differential magnetic cores by a data converting section into digital data, and conducting software integration by a measured data analyzing section based on the data.

Method and device for measuring characteristic magnetic distribution of

A magnetization characteristic measurement device includes a differential magnetic head, a signal generator for exciting the differential magnetic head with a low frequency signal, a magnetic head moving device for moving the differential magnetic head to a predetermined measuring position, a measured data converting device for sampling the differential output voltages from the magnetic head when it is positioned at the predetermined position and for converting the sampled values into digital values, and a measured data analyzing device for sequentially storing the obtained digital values and for calculating the magnetizing characteristics. The structure allows for simple and easy measurement of magnetization characteristics of magnetic thin films attached to a magnetic printing, magnetic tape, etc. by simply setting the magnetic thin film at a position. The result of the measurement is displayed on a display screen or indicated using a buzzing sound to thereby reduce inspection steps. Since the quality is displayed in reference to a predetermined standard, standardization of quality can be easily achieved.

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Himeji, Japan

Toru Nakashima