公开(公告)号：US5651044A

公开(公告)日：1997-07-22

申请号：US537954

申请日：1995-10-02

申请人： Theodore Henry Klotz, Jr. ,  Vivek Venugopal Badami ,  Walter Whipple, III ,  James Frederick Bedard ,  George Charles Goodman

发明人： Theodore Henry Klotz, Jr. ,  Vivek Venugopal Badami ,  Walter Whipple, III ,  James Frederick Bedard ,  George Charles Goodman

IPC分类号： A61B6/10 ,  H05G1/26 ,  H05G1/54

CPC分类号： H05G1/26 ,  A61B6/102 ,  A61B6/4423

摘要： A capacitive proximity detection system for positioning a movable radiation imaging element support structure with respect to a subject includes a plurality of sensor plates disposed in a collar assembly around a portion of an imaging component disposed towards a subject; a multiplexer coupled to the plurality of capacitive plate elements and adapted to selectively electrically couple the sensor plate elements in one of a plurality of sensing range modalities; and a capacitive sensing processor coupled to the sensor plate elements via the multiplexer so as to detect proximity of object to the sensor plate as a function of the capacitance between the sensor plates and the subject. The imaging system typically further includes a shield system coupled to the multiplexer and disposed so as to focus the capacitive sensing of the sensor plate elements towards the subject. The shield system includes a plurality of shielding plate elements disposed in a shielding pattern that corresponds with the pattern of sensor plate elements in the collar assembly. The shield plate elements are coupled to the capacitive sensing processor to receive a shield plate feedback signal therefrom.

摘要翻译： 用于相对于被摄体定位可移动辐射成像元件支撑结构的电容式接近检测系统包括围绕设置成朝向被检体的成像部件的一部分设置在套环组件中的多个传感器板; 耦合到所述多个电容板元件并且适于以多个感测范围模式之一选择性地电耦合所述传感器板元件; 以及经由多路复用器耦合到传感器板元件的电容感测处理器，以便根据传感器板和被摄体之间的电容来检测物体对传感器板的接近度。 成像系统通常还包括耦合到多路复用器的屏蔽系统，并被设置成将传感器板元件的电容感测聚焦到被摄体。 屏蔽系统包括多个屏蔽板元件，该屏蔽板元件设置在屏蔽图案中，该屏蔽图案对应于套环组件中的传感器板元件的图案。 屏蔽板元件耦合到电容感测处理器以从其接收屏蔽板反馈信号。