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公开(公告)号：US09726755B2
公开(公告)日：2017-08-08
申请号：US14863114
申请日：2015-09-23
发明人： Jack Conway Kitchens, II , John Keith Schneider , Stephen Michael Gojevic , Timothy Alan Dickinson , Philip John Schneider , Evan Breloff , Evan Robert Hildreth
CPC分类号： G01S7/539 , G06K9/00107 , G06K9/0012 , G06K9/00899
摘要： Methods and systems of determining whether an object is alive, and therefore part of a live individual, are described. An object having an outer surface (e.g. a friction-ridge surface of a finger) and internal parts (e.g. tissue layer, papillae, blood vessels, fat, muscle, nail and bone) is scanned by a system having a transmitter, receiver and computer. One such system has a substantially planar piezoelectric transmit-layer, an ultrasonic receiver array having a plurality of receivers, and a platen. The transmit layer is caused to produce an ultrasound plane-wave traveling toward the object residing on the platen. Using the ultrasonic receiver, ultrasonic energy that has been reflected from the object is detected. The detected ultrasonic energy is analyzed to provide an analysis result, and the analysis result is compared to a template. A determination is made as to whether the analysis result and the template are similar, and the object is declared to be alive if the analysis result is determined to be similar to the template.
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公开(公告)号：US11346930B2
公开(公告)日：2022-05-31
申请号：US16534113
申请日：2019-08-07
发明人： Jack Conway Kitchens, II , John Keith Schneider , Stephen Michael Gojevic , Timothy Dickinson , Philip John Schneider , Evan Breloff , Evan Robert Hildreth
摘要： An object having an outer surface (e.g. a friction-ridge surface of a finger) and internal parts (e.g. tissue layer, papillae, blood vessels, fat, muscle, nail and bone) is scanned by a system having a transmitter, receiver and computer. One such system has a substantially planar piezoelectric transmit-layer, an ultrasonic receiver array having a plurality of receivers, and a platen. The transmit layer is caused to produce an ultrasound plane-wave traveling toward the object residing on the platen. Using the ultrasonic receiver, ultrasonic energy that has been reflected from the object is detected. The detected ultrasonic energy is analyzed to provide an analysis result, and the analysis result is compared to a template. A determination is made as to whether the analysis result and the template are similar, and the object is declared to be alive if the analysis result is determined to be similar to the template.
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公开(公告)号：US20170082740A1
公开(公告)日：2017-03-23
申请号：US14863114
申请日：2015-09-23
发明人： Jack Conway Kitchens, II , John Keith Schneider , Stephen Michael Gojevic , Timothy Alan Dickinson , Phillip John Schneider , Evan Breloff , Evan Robert Hildreth
IPC分类号： G01S7/539
CPC分类号： G01S7/539 , G06K9/00107 , G06K9/0012 , G06K9/00899
摘要： Methods and systems of determining whether an object is alive, and therefore part of a live individual, are described. An object having an outer surface (e.g. a friction-ridge surface of a finger) and internal parts (e.g. tissue layer, papillae, blood vessels, fat, muscle, nail and bone) is scanned by a system having a transmitter, receiver and computer. One such system has a substantially planar piezoelectric transmit-layer, an ultrasonic receiver array having a plurality of receivers, and a platen. The transmit layer is caused to produce an ultrasound plane-wave traveling toward the object residing on the platen. Using the ultrasonic receiver, ultrasonic energy that has been reflected from the object is detected. The detected ultrasonic energy is analyzed to provide an analysis result, and the analysis result is compared to a template. A determination is made as to whether the analysis result and the template are similar, and the object is declared to be alive if the analysis result is determined to be similar to the template.
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