公开(公告)号：US09921045B2

公开(公告)日：2018-03-20

申请号：US14218516

申请日：2014-03-18

Applicant: QUALCOMM Incorporated

Inventor： Lukas Sieber ,  Marcel Fischer ,  Hanspeter Widmer

IPC: G01B7/00 ,  G01R29/08 ,  B60L11/18 ,  H02J7/02 ,  H02J5/00

CPC classification number: G01B7/003 ,  B60L11/182 ,  B60L11/1829 ,  B60L11/1833 ,  B60L2270/147 ,  G01R29/0807 ,  H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H02J50/40 ,  H02J50/60 ,  H02J50/80 ,  H02J50/90 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T90/12 ,  Y02T90/121 ,  Y02T90/122 ,  Y02T90/125 ,  Y02T90/14

Abstract: An apparatus for detecting a presence of an object can include a plurality of electrically conductive loops arranged in an array. The apparatus includes a sensor circuit configured to determine a characteristic associated with each of the plurality of loops. The apparatus includes a hardware processor configured to, for each loop of the plurality of loops, determine a parameter based on the characteristic associated with the loop and the characteristic associated with at least one adjacent loop. The hardware processor may be further configured to determine the presence of the object based on the parameter. The parameter may comprise a sum of a difference between the characteristic associated with the loop and a reference value for the characteristic, and a difference between the characteristic associated with each of the at least one adjacent loop and the reference value.

公开(公告)号：US09726518B2

公开(公告)日：2017-08-08

申请号：US13791585

申请日：2013-03-08

Applicant: QUALCOMM Incorporated

Inventor： Hanspeter Widmer ,  Markus Bittner ,  Lukas Sieber ,  Marcel Fischer

IPC: H01F38/14 ,  G01D5/20 ,  G01N27/72 ,  B60L3/00 ,  B60L3/04 ,  B60L11/14 ,  B60L11/18 ,  H02J50/12 ,  H02J50/60 ,  H04B5/00 ,  G01V3/10

CPC classification number: G01D5/2006 ,  B60L3/003 ,  B60L3/0038 ,  B60L3/0046 ,  B60L3/04 ,  B60L11/14 ,  B60L11/1803 ,  B60L11/182 ,  B60L11/1824 ,  B60L11/1833 ,  B60L11/1835 ,  B60L11/1842 ,  B60L11/1844 ,  B60L11/1846 ,  B60L11/1877 ,  B60L2200/12 ,  B60L2200/22 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2230/16 ,  B60L2240/36 ,  B60L2240/525 ,  B60L2250/16 ,  B60L2270/147 ,  B60L2270/32 ,  B60L2270/34 ,  G01N27/725 ,  G01V3/10 ,  H01F38/14 ,  H02J50/12 ,  H02J50/60 ,  H04B5/0037 ,  H04B5/0043 ,  Y02E60/721 ,  Y02T10/70 ,  Y02T10/7005 ,  Y02T10/705 ,  Y02T10/7077 ,  Y02T10/7088 ,  Y02T10/7241 ,  Y02T90/121 ,  Y02T90/122 ,  Y02T90/125 ,  Y02T90/127 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/163 ,  Y02T90/169 ,  Y04S10/126 ,  Y04S30/14

Abstract: This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object is provided. The apparatus includes a resonant circuit having a resonant frequency. The resonant circuit includes a sense circuit including an electrically conductive structure. The apparatus further includes a coupling circuit coupled to the sense circuit. The apparatus further includes a detection circuit coupled to the sense circuit via the coupling circuit. The detection circuit is configured to detect the presence of the object in response to detecting a difference between a measured characteristic that depends on a frequency at which the resonant circuit is resonating and a corresponding characteristic that depends on the resonant frequency of the resonant circuit. The coupling circuit is configured to reduce a variation of the resonant frequency by the detection circuit in the absence of the object.

公开(公告)号：US20140015522A1

公开(公告)日：2014-01-16

申请号：US13791365

申请日：2013-03-08

Applicant: QUALCOMM INCORPORATED

Inventor： Hanspeter Widmer ,  Markus Bittner ,  Lukas Sieber ,  Marcel Fischer

IPC: G01N27/72

CPC classification number: G01D5/2006 ,  B60L3/003 ,  B60L3/0038 ,  B60L3/0046 ,  B60L3/04 ,  B60L11/14 ,  B60L11/1803 ,  B60L11/182 ,  B60L11/1824 ,  B60L11/1833 ,  B60L11/1835 ,  B60L11/1842 ,  B60L11/1844 ,  B60L11/1846 ,  B60L11/1877 ,  B60L2200/12 ,  B60L2200/22 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2230/16 ,  B60L2240/36 ,  B60L2240/525 ,  B60L2250/16 ,  B60L2270/147 ,  B60L2270/32 ,  B60L2270/34 ,  G01N27/725 ,  G01V3/10 ,  H01F38/14 ,  H02J50/12 ,  H02J50/60 ,  H04B5/0037 ,  H04B5/0043 ,  Y02E60/721 ,  Y02T10/70 ,  Y02T10/7005 ,  Y02T10/705 ,  Y02T10/7077 ,  Y02T10/7088 ,  Y02T10/7241 ,  Y02T90/121 ,  Y02T90/122 ,  Y02T90/125 ,  Y02T90/127 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/163 ,  Y02T90/169 ,  Y04S10/126 ,  Y04S30/14

Abstract: This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object in a magnetic field is provided. The apparatus includes a power circuit configured to generate the magnetic field and transfer power wirelessly at a level sufficient to power or charge a load via the magnetic field. The apparatus further includes a detection circuit configured to transmit signals and detect, based on a reflection of the transmitted signals, a frequency of vibration of the object caused by the magnetic field.

Abstract translation: 本公开提供了用于检测异物的系统，方法和装置。 在一个方面，提供一种用于检测物体在磁场中的存在的装置。 该装置包括电源电路，其被配置为产生磁场并以足以通过磁场对负载供电或充电的水平无线地传送电力。 该装置还包括检测电路，该检测电路被配置为发送信号并且基于所发送的信号的反射来检测由该磁场引起的物体的振动频率。