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公开(公告)号:US08561777B2
公开(公告)日:2013-10-22
申请号:US11877437
申请日:2007-10-23
摘要: A coin sensor performs time-domain eddy-current testing using an inductance in one arm of a Maxwell bridge which is driven by a bipolar square wave having randomly-selected intervals between transitions, the output of the bridge being sampled at a high frequency. A processor stores a model which receives the drive signal and adjusts coefficients of the model so that the output matches the sampled measurements. Acceptance criteria are applied to the adjusted coefficients for coin classification purposes.
摘要翻译: 硬币传感器使用由在转换之间随机选择的间隔的双极方波驱动的麦克斯韦电桥的一个臂中的电感进行时域涡流测试,桥的输出以高频率进行采样。 处理器存储接收驱动信号并调整模型的系数的模型,使得输出与采样的测量一致。 验收标准适用于硬币分类目的的调整系数。
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公开(公告)号:US5992600A
公开(公告)日:1999-11-30
申请号:US647999
申请日:1996-06-19
申请人: Gaston Baudat
发明人: Gaston Baudat
CPC分类号: G06K9/6267 , G06K9/66 , G07D7/12 , G07D7/20
摘要: A method of classifying a test article as one of a plurality of acceptable denominations of articles of currency, comprising applying a statistical classification process which employs discriminant surfaces derived from previous test articles known to be valid or invalid and is arranged to distinguish therebetween, characterized by applying also an acceptance boundary test which limits the acceptance volume for each denomination so as to exclude forgeries for which the discriminant surfaces were not derived.
摘要翻译: PCT No.PCT / IB94 / 00375 Sec。 371日期1996年6月19日 102(e)日期1996年6月19日PCT 1994年11月30日PCT PCT。 公开号WO95 / 15540 日期:1995年6月8日将测试物品分类为货币物品的多个可接受面额之一的方法,包括应用统计分类处理,所述统计分类处理采用从已知有效或无效的先前测试物品衍生的判别式表面, 在此之间进行区分,其特征在于还应用接受边界测试,其限制每个面额的接受体积,以排除不导致判别表面的伪造。
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