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    • 9. 发明授权
    • Currency paper and banknote verification device
    • 货币纸币和钞票验证装置
    • US5308992A
    • 1994-05-03
    • US814824
    • 1991-12-31
    • Timothy T. CraneRobert J. DanekSteven K. HarbaughRichard A. Menelly
    • Timothy T. CraneRobert J. DanekSteven K. HarbaughRichard A. Menelly
    • G06K7/08G06K7/14G07D7/02G07D7/12G06K5/00
    • G07D7/002G06K7/081G06K7/14G07D7/026
    • A photodiode and a phototransistor are positioned on opposite sides of a document subjected to verification for authenticity under transmitted light. A logic circuit determines the presence or absence of the security feature and correspondingly provides visual or audible indication thereof. The photodiode, phototransistor and related circuitry are arranged within an enclosure that is attached to a currency receiving device such as a cash register. The visual or audible indicators are mounted on the cash register for immediate indication of the currency verification to the cashier. A simplified capacitive proximity sensor can be employed, per se, for inexpensive applications or for redundant verification in combination with an optical detector. The shape of the capacitive sensor is configured to that of the security thread to discriminate between the security thread and the currency paper. Additional optical circuits are employed to detect counterfeit markings on the currency surface.
    • 光电二极管和光电晶体管位于经过验证的文件的相对两侧,在透射光下的真实性。 逻辑电路确定安全特征的存在或不存在,并且相应地提供其可视或可听见的指示。 光电二极管,光电晶体管和相关电路被布置在附接到货币接收装置(例如收银机)的外壳内。 视觉或听觉指标安装在收银机上,以便立即向收银员显示货币验证。 简单的电容式接近传感器本身可以用于廉价的应用或与光学检测器组合的冗余验证。 电容传感器的形状被配置为安全线程的形状,以区分安全线和钞票。 采用额外的光学电路来检测货币表面上的假冒标记。