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    • 41. 发明申请
    • PIEZOELECTRIC IDENTIFICATION DEVICE AND APPLICATIONS THEREOF
    • 压电识别装置及其应用
    • WO0171648A3
    • 2002-03-28
    • PCT/US0109187
    • 2001-03-23
    • CROSS MATCH TECHNOLOGIES INC
    • SCOTT WALTER GUYJONES DONALD EDWARD
    • A61B5/0295A61B5/0285A61B5/117A61B8/06A61B8/08G06K9/00G06T1/00H01L41/08H01L41/113H02N2/00H04R17/00
    • G06K9/0002G06K9/00885H01L27/20
    • An identification device having a piezoelectric sensor array is used to obtain biometric data. In one embodiment, a piezo ceramic sensory array is used to obtain biometric data. In another embodiment, a multi-layer sensor array structure having a PVDF layer in between two conductor grids orthogonal to one another is used to obtain biometric data. Urethane can be added to one side of the sensor array where a finger is placed. A foam substrate can be used as a support. Multiplexers are switched to control the sensor. The device has several operating modes for obtaining a variety of biometric data, including an impedance detection mode, a voltage detection mode, an imaging mode, and a Doppler-shift detection mode. The presence of a fingerprint on the sensor can be used to turn-on the device. The device is capable of capturing a fingerprint, forming a three-dimensional map of a finger bone, and/or determining the direction and speed of arteriole and/or capillary blood flow in a finger. A single pixel or a group of pixels can be detected and readout to a memory. The device can be used as an electronic signature device. The device can operate as part of a personal area network, using a public service layer according to the invention.
    • 使用具有压电传感器阵列的识别装置来获得生物特征数据。 在一个实施例中,使用压电陶瓷感官阵列来获得生物特征数据。 在另一个实施例中,使用在彼此正交的两个导体栅格之间具有PVDF层的多层传感器阵列结构来获得生物特征数据。 聚氨酯可以添加到放置手指的传感器阵列的一侧。 泡沫基材可用作载体。 多路复用器被切换以控制传感器。 该装置具有用于获得各种生物特征数据的多种操作模式,包括阻抗检测模式,电压检测模式,成像模式和多普勒频移检测模式。 可以使用传感器上指纹的存在来打开设备。 该装置能够捕获指纹,形成手指骨的三维图,和/或确定手指中的小动脉和/或毛细血管血流的方向和速度。 可以检测单个像素或一组像素并将其读出到存储器。 该设备可以用作电子签名设备。 使用根据本发明的公共服务层,设备可以作为个人区域网络的一部分来操作。
    • 43. 发明申请
    • APPARATUS AND METHOD FOR MEASURING PULSE TRANSIT TIME
    • 用于测量脉冲传输时间的装置和方法
    • WO00010453A1
    • 2000-03-02
    • PCT/US1999/019258
    • 1999-08-24
    • A61B5/0245A61B5/02A61B5/024A61B5/0285A61B5/11A61B7/04G01D5/353
    • A61B5/6892A61B5/02125A61B5/02416A61B5/0285A61B5/7239A61B7/04A61B2562/0204A61B2562/0266A61B2562/168
    • In a method of measuring pulse transit time of a living subject, first and second pulse wave signals are produced by sensing the pulse at first and second pulse points, respectively, the first and second pulse points being spaced from one another. The first and second pulse wave signals are differentiated, and based on the results, corresponding points of the first and second pulse wave signals are selected (e.g., points of maximum slope). The time delay between the selected points is determined, thus yielding the pulse transit time. A preferred apparatus measures pulse transit time using at least one fiberoptic pulse sensor including a fused-fiber coupling region having at least a portion that can be deflected without putting the coupling region under tension.
    • 在测量活体受试者的脉搏传播时间的方法中,通过分别在第一和第二脉冲点检测脉冲,产生第一和第二脉冲波信号,第一和第二脉冲点彼此间隔开。 第一和第二脉波信号是微分的,并且基于该结果,选择第一和第二脉波信号的对应点(例如,最大斜率点)。 确定所选点之间的时间延迟,从而产生脉冲传播时间。 优选的装置使用至少一个光纤脉冲传感器来测量脉冲传播时间,所述光纤脉冲传感器包括具有至少一部分可以被偏转的熔融纤维耦合区域,而不会使耦合区域处于张力状态。