| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of the low reliability of measurement due to the change of read data caused by speed unevenness for conveying the magnetic card of a reader. SOLUTION: When the recorded data of a magnetic card is read, the speed unevenness of the card conveying system if a reader is measured, and the speed unevenness is subtracted from the measured value of a magnetic flux inversion interval read by the reader and displayed. The absolute values of the measured magnetic flux inversion interval and magnetic field intensity are displayed. '0' and '1' are separately displayed. The movement average of both of the magnetic flux inversion interval and the magnetic field intensity is displayed. Measurement is carried out by a plurality of times, and the magnetic field intensity and the magnetic flux inversion interval are averaged for each recording position and displayed. An appropriateness determination area is displayed in the abscissa and the ordinate of a screen. Measurement data is superposed on the recorded data of a reference card to be displayed. A difference between the measurement data and the reference card. |
