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    • 10. 发明专利
    • PHOTOELECTRIC MEASUREMENT METHOD AND DEVICE AND PAPER MONEY VERIFICATION
    • JPH11287766A
    • 1999-10-19
    • JP35093598
    • 1998-12-10
    • MARS INC
    • HUTCHINSON DEREK
    • G01N21/89G01N21/892G07D7/00
    • PROBLEM TO BE SOLVED: To reduce a quantization error due to the request for a large dynamic range by obtaining the amount of measurement based on the accumulation of each valence that is obtained during each measurement interval and changes along with a charging speed. SOLUTION: An LED array 8 applies light to a paper money 10 to be scanned by a sensor array 6 when the paper money 10 moves in a direction of A by a roller 12. Also, the array 8 is provided with, for example, red, green, and infrared LEDs 18, 20, and 22 consisting of a number of sections 16 and have different colors and are driven continuously. In a plurality of sensors 24 that the sensor array 6 has, the voltage at the connection point with a capacitor changes at a speed that depends on the light intensity being received corresponding to the reception of the reflected light of the corresponding LEDs at a region where the paper money 10 is located, thus changing output. On operation, LEDs with the same color are simultaneously driven, and a set of the amount of measurement is created based on the accumulation of the output of the sensors 24 by a verification device 4. After the set of the amount of measurement 1 is created, LEDs with different colors are driven. Similarly, the amount of measurement of different colors is obtained continuously.