| 摘要 |
PURPOSE: A bank note detector has four LED's sensing Red, Green, Blue, and infrared reflection and transmissivity of the bank note. The signals from the amplifiers are fed to a microcomputer and/or microprocessor for analysis. CONSTITUTION: In the bank note detector, a photodiode (10) consisting of multiple LED's is arranged to selectively sense the light emission from the bank note being tested, as it passes through the validating section, of the bank note validator. The signal, i.e., the current produced by the photodiode (10) from a selected LED is fed to an amplifier section (12) generally depicted by the section, the operation of which, including the sequencing of the output from the section (12) is controlled by a computer control (CPU) stage (14) for analysis, display and determination of the validity of the bank note.
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