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1. 发明授权

US11629818B2 Safety system for machinery 有权
公开(公告)号：US11629818B2
公开(公告)日：2023-04-18
申请号：US17087706
申请日：2020-11-03
申请人： ALKEN Inc.
发明人： Keith Hanf , Allan Rodgers, Jr.
IPC分类号： F16P3/14 , B26D7/24 , B25F5/00 , A41D19/00 , B02C23/04
摘要： A safety system for a machine having a danger zone includes an induction coil having one or more turns extending along the periphery of a part of a worker's body as, for example, extending alone the fingers of a glove worn by the worker. A drive circuit applies a time-varying current having an identifiable characteristic such as the frequency of an alternating current. A magnetic field having the characteristic of the time-varying current is induced in an omnidirectional magnetic field sensor mounted adjacent the danger zone. The magnitude of this field is monitored. When the magnitude exceeds a threshold, a warning signal is issued and protective action may be taken, such as stopping or reversing the machine.

2. 发明授权

US11050197B1 Reversible connector orientation detection in an electromagnetic tracking system 有权
公开(公告)号：US11050197B1
公开(公告)日：2021-06-29
申请号：US16773396
申请日：2020-01-27
申请人： ALKEN Inc.
发明人： Robert F. Higgins , Henry E. Himberg , Keith M. Hanf
IPC分类号： G01B7/004 , G06F3/00 , H01R13/66 , H01R13/64
摘要： An apparatus and method for implementing a reversible connector for receiving coil-based sensor signals in an electromagnetic or hybrid tracking system. The apparatus is designed to reduce the number of connector pins assigned to the coil-based sensor signals while maintaining signal quality.

3. 发明申请

US20210048145A1 Safety System For Machinery 有权
公开(公告)号：US20210048145A1
公开(公告)日：2021-02-18
申请号：US17087706
申请日：2020-11-03
申请人： ALKEN Inc., dba Polhemus
发明人： Keith Hanf , Allan Rodgers, JR.
IPC分类号： F16P3/14 , B26D7/24
摘要： A safety system for a machine having a danger zone includes an induction coil having one or more turns extending along the periphery of a part of a worker's body as, for example, extending alone the fingers of a glove worn by the worker. A drive circuit applies a time-varying current having an identifiable characteristic such as the frequency of an alternating current. A magnetic field having the characteristic of the time-varying current is induced in an omnidirectional magnetic field sensor mounted adjacent the danger zone. The magnitude of this field is monitored. When the magnitude exceeds a threshold, a warning signal is issued and protective action may be taken, such as stopping or reversing the machine.

4. 发明授权

US07710395B2 Head-mounted pointing and control device 有权
标题翻译：头戴指示和控制装置
公开(公告)号：US07710395B2
公开(公告)日：2010-05-04
申请号：US11175877
申请日：2005-07-06
申请人： Allan G. Rodgers , Robert F. Higgins , Suzanne T. Gagnon , James C. Farr
发明人： Allan G. Rodgers , Robert F. Higgins , Suzanne T. Gagnon , James C. Farr
IPC分类号： G09G5/08
CPC分类号： G06F3/012
摘要： A magnetic tracker system for use on an operator's head makes “mouse”/cursor movements on a screen similar to that of the classic computer “mouse”/track ball/touchpad/joystick. Only head movements are used as opposed to lifting a hand from the keyboard for making such moves. The new “mouse” avoids interrupting the hands from their position on the keyboard and has no moving mechanical parts that become clogged and that need a special surface (mouse pad) or special surface measurements (optical mouse).
摘要翻译：用于操作人员头部的磁跟踪系统使屏幕上的“鼠标”/光标移动类似于经典计算机“鼠标”/轨迹球/触摸板/操纵杆的移动。仅使用头部动作，而不是从键盘上提起手来进行这种移动。新的“鼠标”避免了从键盘上的手中断手，没有移动的机械部件被堵塞，需要特殊的表面（鼠标垫）或特殊的表面测量（光电鼠标）。

5. 发明授权

US11326905B1 Dynamic mixing of and switching between sensor measurements in hybrid trackers using electromagnetic tracking 有权
公开(公告)号：US11326905B1
公开(公告)日：2022-05-10
申请号：US16773482
申请日：2020-01-27
申请人： ALKEN Inc.
发明人： Henry E. Himberg , Allan G. Rodgers, Jr. , Robert F. Higgins
IPC分类号： G01D5/22 , G01B11/14
摘要： A system and method for implementing a technique for dynamically switching between or mixing position and orientation determinations in a hybrid tracking system using both electromagnetic and non-electromagnetic tracking, and having a transmitter coil array for generating a magnetic field, a receiver circuit for sensing the magnetic field, and at least one non-magnetic sensor.

6. 发明申请

US20190242523A1 SAFETY SYSTEM FOR MACHINERY 审中-公开
公开(公告)号：US20190242523A1
公开(公告)日：2019-08-08
申请号：US16269993
申请日：2019-02-07
申请人： ALKEN Inc., dba Polhemus
发明人： Keith Hanf , Allan Rodgers, JR.
IPC分类号： F16P3/14 , B26D7/24
CPC分类号： F16P3/145 , A41D19/0027 , A41D19/0031 , B02C23/04 , B25F5/00 , B26D7/24 , F16P3/147
摘要： A safety system for a machine having a danger zone includes an induction coil having one or more turns extending along the periphery of a part of a worker's body as, for example, extending alone the fingers of a glove worn by the worker. A drive circuit applies a time-varying current having an identifiable characteristic such as the frequency of an alternating current. A magnetic field having the characteristic of the time-varying current is induced in an omnidirectional magnetic field sensor mounted adjacent the danger zone. The magnitude of this field is monitored. When the magnitude exceeds a threshold, a warning signal is issued and protective action may be taken, such as stopping or reversing the machine.

7. 发明授权

US08121812B2 AC magnetic tracking with phase disambiguation 有权
标题翻译：交流磁跟踪与相位消歧
公开(公告)号：US08121812B2
公开(公告)日：2012-02-21
申请号：US12283296
申请日：2008-09-10
申请人： Robert F. Higgins
发明人： Robert F. Higgins
IPC分类号： G01C17/00 , H01F5/00
CPC分类号： A61B5/06 , A61B5/062 , A61B5/1077 , A61B5/7257
摘要： A method and system for magnetic locating resolves phase ambiguity. The system uses time-division multiplexed magnetic fields emitted from plural transmit coils. The magnetic fields are alternating fields at a carrier frequency, and the fields emitted from different coils in different transmit intervals have known phase relationship with one another as, for example where the alternating fields are coherent with one another. A receiver uses a plurality of sensor coils and derives plural components using the common phase reference or plural phase reference times having a known relationship. If the determinant of a matrix of the components has a first value, the phase information in the components is correct, and position and orientation are derived from the components. If the determinant has a second value, the phase information in the components is incorrect. In this case, corrected components are formed by shifting the phases of the components π radians; the position and orientation are derived from the corrected components.
摘要翻译：磁定位的方法和系统解决相位模糊。该系统使用从多个发射线圈发射的时分复用磁场。磁场是载波频率处的交变场，并且在不同发射间隔中从不同线圈发射的场彼此具有已知的相位关系，例如，其中交替场彼此相干。接收机使用多个传感器线圈并使用公共相位参考或具有已知关系的多个相位参考时间导出多个分量。如果组件的矩阵的行列式具有第一个值，则组件中的相位信息是正确的，并且从组件导出位置和方向。如果行列式具有第二个值，则组件中的相位信息不正确。在这种情况下，通过移动部件＆pgr的相位来形成校正部件; 弧度位置和方向是从校正的组件导出的。

8. 发明申请

US20090076746A1 AC magnetic tracking with phase disambiguation 有权
标题翻译：交流磁跟踪与相位消歧
公开(公告)号：US20090076746A1
公开(公告)日：2009-03-19
申请号：US12283296
申请日：2008-09-10
申请人： Robert F. Higgins
发明人： Robert F. Higgins
IPC分类号： G01B7/00 , G01R33/02
CPC分类号： A61B5/06 , A61B5/062 , A61B5/1077 , A61B5/7257
摘要： A method and system for magnetic locating resolves phase ambiguity. The system uses time-division multiplexed magnetic fields emitted from plural transmit coils. The magnetic fields are alternating fields at a carrier frequency, and the fields emitted from different coils in different transmit intervals have known phase relationship with one another as, for example where the alternating fields are coherent with one another. A receiver uses a plurality of sensor coils and derives plural components using the common phase reference or plural phase reference times having a known relationship. If the determinant of a matrix of the components has a first value, the phase information in the components is correct, and position and orientation are derived from the components. If the determinant has a second value, the phase information in the components is incorrect. In this case, corrected components are formed by shifting the phases of the components π radians; the position and orientation are derived from the corrected components.
摘要翻译：磁定位的方法和系统解决相位模糊。该系统使用从多个发射线圈发射的时分复用磁场。磁场是载波频率处的交变场，并且在不同发射间隔中从不同线圈发射的场彼此具有已知的相位关系，例如，其中交替场彼此相干。接收机使用多个传感器线圈并使用公共相位参考或具有已知关系的多个相位参考时间导出多个分量。如果组件的矩阵的行列式具有第一个值，则组件中的相位信息是正确的，并且从组件导出位置和方向。如果行列式具有第二个值，则组件中的相位信息不正确。在这种情况下，通过偏移分量pi弧度的相位来形成校正分量; 位置和方向是从校正的组件导出的。

9. 发明授权

US11585680B1 Dynamic mixing of and switching between sensor measurements in hybrid trackers using electromagnetic tracking 有权
公开(公告)号：US11585680B1
公开(公告)日：2023-02-21
申请号：US17737162
申请日：2022-05-05
申请人： ALKEN Inc.
发明人： Henry E. Himberg , Allan G. Rodgers, Jr. , Robert F. Higgins
IPC分类号： G01D5/22 , G01B11/14
摘要： A system and method for implementing a technique for dynamically switching between or mixing position and orientation determinations in a hybrid tracking system using both electromagnetic and non-electromagnetic tracking, and having a transmitter coil array for generating a magnetic field, a receiver circuit for sensing the magnetic field, and at least one non-magnetic sensor.

10. 发明授权

US11029369B1 Self-leveling magnetic source 有权
公开(公告)号：US11029369B1
公开(公告)日：2021-06-08
申请号：US16773370
申请日：2020-01-27
申请人： ALKEN Inc.
发明人： Robert F. Higgins , Allan G. Rodgers, Jr.
IPC分类号： G01R33/00 , G01B7/00 , G01P13/00 , G01P15/08
摘要： A method for calibrating a magnetic source of an electromagnetic tracking system for tracking a position and orientation of an object using an inertial motion unit (IMU) mounted to the magnetic source and aligned with the coil array of magnetic source. Pitch and rolls angles of the coil array are calibrated using the IMU.

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