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1. 发明授权

US09645205B2 Combined electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) magnetometer system 有权
公开(公告)号：US09645205B2
公开(公告)日：2017-05-09
申请号：US13711199
申请日：2012-12-11
申请人： Michael S. Larsen , Robert C. Griffith , Michael D. Bulatowicz , Philip R. Clark
发明人： Michael S. Larsen , Robert C. Griffith , Michael D. Bulatowicz , Philip R. Clark
IPC分类号： G01V3/00 , G01R33/24 , G01R33/26
CPC分类号： G01R33/26 , G01R33/032 , G01R33/24 , G01R33/443 , G01R33/60
摘要： One embodiment of the invention includes a magnetometer system. The system includes a sensor cell comprising alkali metal particles and a probe laser configured to provide a probe beam through the sensor cell. The system also includes a detection system configured to implement nuclear magnetic resonance (NMR) detection of a vector magnitude of an external magnetic field in a first of three orthogonal axes based on characteristics of the probe beam passing through the sensor cell and to implement electron paramagnetic resonance (EPR) detection of a vector magnitude of the external magnetic field in a second and a third of the three orthogonal axes based on the characteristics of the probe beam passing through the sensor cell. The system further includes a controller configured to calculate a scalar magnitude of the external magnetic field based on the magnitude of the external magnetic field in each of the three orthogonal axes.

2. 发明授权

US10060993B2 Combined electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) magnetometer system 有权
公开(公告)号：US10060993B2
公开(公告)日：2018-08-28
申请号：US15474433
申请日：2017-03-30
申请人： Michael S. Larsen , Robert C. Griffith , Michael D. Bulatowicz , Philip R. Clark
发明人： Michael S. Larsen , Robert C. Griffith , Michael D. Bulatowicz , Philip R. Clark
IPC分类号： G01V3/00 , G01R33/26 , G01R33/032 , G01R33/60 , G01R33/44
CPC分类号： G01R33/26 , G01R33/032 , G01R33/24 , G01R33/443 , G01R33/60
摘要： One embodiment of the invention includes a magnetometer system. The system includes a sensor cell comprising alkali metal particles and a probe laser configured to provide a probe beam through the sensor cell. The system also includes a detection system configured to implement nuclear magnetic resonance (NMR) detection of a vector magnitude of an external magnetic field in a first of three orthogonal axes based on characteristics of the probe beam passing through the sensor cell and to implement electron paramagnetic resonance (EPR) detection of a vector magnitude of the external magnetic field in a second and a third of the three orthogonal axes based on the characteristics of the probe beam passing through the sensor cell. The system further includes a controller configured to calculate a scalar magnitude of the external magnetic field based on the magnitude of the external magnetic field in each of the three orthogonal axes.

3. 发明申请

US20120191396A1 GYROSCOPE SYSTEM MAGNETIC FIELD ERROR COMPENSATION 有权
标题翻译：陀螺仪系统磁场误差补偿
公开(公告)号：US20120191396A1
公开(公告)日：2012-07-26
申请号：US13011530
申请日：2011-01-21
申请人： Robert C. Griffith , Michael S. Larsen , Michael D. Bulatowicz
发明人： Robert C. Griffith , Michael S. Larsen , Michael D. Bulatowicz
IPC分类号： G06F19/00
CPC分类号： G01C19/62
摘要： One embodiment of the invention includes a nuclear magnetic resonance (NMR) gyroscope system. The system includes a gyro cell that is sealed to enclose an alkali metal vapor, a first gyromagnetic isotope, and a second gyromagnetic isotope. A magnetic field generator configured to generate a magnetic field that is provided through the gyro cell to cause the first and the second gyromagnetic isotopes to precess. A magnetic field error controller configured to measure an error associated with a magnitude of the magnetic field and to generate an error signal that is fed back to the magnetic field generator to maintain the magnetic field at a desired magnitude. The system further includes a mechanization processor configured to calculate a rotation angle about a sensitive axis of the NMR gyroscope system based on a measured precession angle of at least one of the first and second gyromagnetic isotopes and the error signal.
摘要翻译：本发明的一个实施例包括核磁共振（NMR）陀螺仪系统。该系统包括密封以包围碱金属蒸气的陀螺仪单元，第一回旋磁同位素和第二回旋磁同位素。磁场发生器被配置为产生通过陀螺仪单元提供的磁场，以使第一和第二回旋磁同位素进入。磁场误差控制器被配置为测量与磁场的大小相关联的误差，并且产生反馈到磁场发生器以将磁场维持在期望的大小的误差信号。该系统还包括机械化处理器，其被配置为基于所测量的第一和第二回旋磁同位素和误差信号中的至少一个的进动角来计算关于NMR陀螺仪系统的敏感轴的旋转角度。

4. 发明授权

US09285390B2 Optical accelerometer system 有权
标题翻译：光学加速度计系统
公开(公告)号：US09285390B2
公开(公告)日：2016-03-15
申请号：US13907333
申请日：2013-05-31
申请人： A. Douglas Meyer , Michael D. Bulatowicz , Michael S. Larsen , Robert C. Griffith
发明人： A. Douglas Meyer , Michael D. Bulatowicz , Michael S. Larsen , Robert C. Griffith
IPC分类号： G01P15/08 , G01P15/093 , G01P15/18
CPC分类号： G01P15/093 , G01P15/08 , G01P15/18
摘要： One embodiment includes an accelerometer system. The system includes a laser configured to emit an optical beam at a linear polarization. The system also includes an optical cavity system. The optical cavity system includes a mirror that is coupled to an accelerometer housing via a spring and is configured to reflect the optical beam. The optical cavity system also includes at least one photodetector configured to receive at least a portion of at least one of the optical beam and the reflected optical beam and to generate an acceleration signal that is indicative of motion of the mirror resulting from an external acceleration acting upon the accelerometer housing. The system further includes an acceleration processor configured to calculate a magnitude of the external acceleration based on the acceleration signal.
摘要翻译：一个实施例包括加速度计系统。该系统包括被配置为以线偏振发射光束的激光器。该系统还包括光腔系统。光学腔系统包括经由弹簧耦合到加速度计壳体的反射镜，并被配置为反射光束。光腔系统还包括至少一个光电检测器，其被配置为接收光束和反射光束中的至少一个的至少一部分，并且产生指示由外部加速度作用产生的反射镜的运动的加速度信号在加速度计外壳上。该系统还包括加速度处理器，该加速度处理器被配置为基于加速度信号来计算外部加速度的大小。

5. 发明授权

US08600691B2 Gyroscope system magnetic field error compensation 有权
标题翻译：陀螺仪系统磁场误差补偿
公开(公告)号：US08600691B2
公开(公告)日：2013-12-03
申请号：US13011530
申请日：2011-01-21
申请人： Robert C. Griffith , Michael S. Larsen , Michael D. Bulatowicz
发明人： Robert C. Griffith , Michael S. Larsen , Michael D. Bulatowicz
IPC分类号： G01C17/38 , G01V3/00
CPC分类号： G01C19/62
摘要： One embodiment of the invention includes a nuclear magnetic resonance (NMR) gyroscope system. The system includes a gyro cell that is sealed to enclose an alkali metal vapor, a first gyromagnetic isotope, and a second gyromagnetic isotope. A magnetic field generator configured to generate a magnetic field that is provided through the gyro cell to cause the first and the second gyromagnetic isotopes to precess. A magnetic field error controller configured to measure an error associated with a magnitude of the magnetic field and to generate an error signal that is fed back to the magnetic field generator to maintain the magnetic field at a desired magnitude. The system further includes a mechanization processor configured to calculate a rotation angle about a sensitive axis of the NMR gyroscope system based on a measured precession angle of at least one of the first and second gyromagnetic isotopes and the error signal.
摘要翻译：本发明的一个实施例包括核磁共振（NMR）陀螺仪系统。该系统包括密封以包围碱金属蒸气的陀螺仪单元，第一回旋磁同位素和第二回旋磁同位素。磁场发生器被配置为产生通过陀螺仪单元提供的磁场，以使第一和第二回旋磁同位素进入。磁场误差控制器被配置为测量与磁场的大小相关联的误差，并且产生反馈到磁场发生器以将磁场维持在期望的大小的误差信号。该系统还包括机械化处理器，其被配置为基于所测量的第一和第二回旋磁同位素和误差信号中的至少一个的进动角来计算关于NMR陀螺仪系统的敏感轴的旋转角度。

6. 发明授权

US09229073B2 Systems and method to substantially mitigate AC stark shift effects in a sensor system 有权
标题翻译：基本上减轻传感器系统中的交流变换效应的系统和方法
公开(公告)号：US09229073B2
公开(公告)日：2016-01-05
申请号：US13727926
申请日：2012-12-27
申请人： Thad G. Walker , Michael D. Bulatowicz , Michael S. Larsen , Robert C. Griffith , Philip R. Clark
发明人： Thad G. Walker , Michael D. Bulatowicz , Michael S. Larsen , Robert C. Griffith , Philip R. Clark
IPC分类号： G01R33/26 , G01C19/62
CPC分类号： G01R33/26 , G01C19/62
摘要： One embodiment includes a sensor system. The system includes a cell system comprising a pump laser configured to generate a pump beam to polarize alkali metal particles enclosed within a sensor cell. The system also includes a detection system comprising a probe laser configured to generate a probe beam. The detection system can also be configured to calculate at least one measurable parameter based on characteristics of the probe beam passing through the sensor cell resulting from precession of the polarized alkali metal particles in response to an applied magnetic field. The system further includes an AC Stark shift control system configured to frequency-modulate the pump beam and to control a center frequency of a frequency-modulated pump beam based on the characteristics of the probe beam passing through the sensor cell to substantially stabilize and mitigate the effects of AC Stark shift on the at least one measurable parameter.
摘要翻译：一个实施例包括传感器系统。该系统包括一个电池系统，该电池系统包括被配置成产生泵浦光束以使包围在传感器电池内的碱金属颗粒极化的泵浦激光器。该系统还包括检测系统，其包括被配置为产生探测光束的探测激光器。检测系统还可以被配置为基于由施加的磁场响应于偏振的碱金属颗粒的进动而导致通过传感器单元的探针束的特性来计算至少一个可测量的参数。该系统还包括AC Stark变速控制系统，其配置成对泵浦波束进行频率调制，并且基于通过传感器单元的探测光束的特性来控制调频泵浦光束的中心频率，以基本上稳定和减轻 AC Stark移位对至少一个可测量参数的影响。

7. 发明授权

US10782368B2 Pulsed-beam atomic magnetometer system 有权
公开(公告)号：US10782368B2
公开(公告)日：2020-09-22
申请号：US15990974
申请日：2018-05-29
申请人： Michael D. Bulatowicz , Thad G. Walker , Michael S. Larsen
发明人： Michael D. Bulatowicz , Thad G. Walker , Michael S. Larsen
IPC分类号： G01R33/26 , G01R33/032
摘要： One example includes a magnetometer system. The system includes a sensor cell comprising alkali metal vapor and a laser system configured to provide an optical pump beam through the sensor cell in a pulsed manner to facilitate precession of the alkali metal vapor in response to an external magnetic field and to provide an optical probe beam through the sensor cell in a pulsed manner based on a precession frequency of the alkali metal vapor. The system also includes a detection system configured to detect the precession of the alkali metal vapor in response to a detection beam corresponding to the optical probe beam exiting the sensor cell and to calculate an amplitude and direction of the external magnetic field based on the detected precession of the alkali metal vapor.

8. 发明授权

US09618362B2 Self-calibrating nuclear magnetic resonance (NMR) gyroscope system 有权
公开(公告)号：US09618362B2
公开(公告)日：2017-04-11
申请号：US14295091
申请日：2014-06-03
申请人： Michael D. Bulatowicz , Michael S. Larsen
发明人： Michael D. Bulatowicz , Michael S. Larsen
IPC分类号： G01V3/00 , G01C25/00 , G01C19/62
CPC分类号： G01C25/00 , G01C19/62 , G01C25/005
摘要： One embodiment includes a nuclear magnetic resonance (NMR) gyroscope system. The system includes a vapor cell comprising an alkali metal and a plurality of gyromagnetic isotopes and a pump laser configured to generate an optical pump beam configured to spin-polarize the alkali metal. The system also includes a probe laser that generates an optical probe beam and a detection system configured to monitor the optical probe beam and to calculate a rotation of the NMR gyroscope system about a sensitive axis based on a modulation of the optical probe beam in response to precession of the plurality of gyromagnetic isotopes resulting from the spin-polarization of the alkali metal. The system further includes a calibration controller that modulates a characteristic of the optical pump beam to substantially mitigate bias errors associated with the gyromagnetic isotopes in the calculation of the rotation of the NMR gyroscope system about the sensitive axis.

9. 发明授权

US08994371B2 Phase detection in an atomic sensing system 有权
标题翻译：原子感测系统中的相位检测
公开(公告)号：US08994371B2
公开(公告)日：2015-03-31
申请号：US13332536
申请日：2011-12-21
申请人： Michael S. Larsen , Robert Griffith , Michael D. Bulatowicz , Philip R. Clark
发明人： Michael S. Larsen , Robert Griffith , Michael D. Bulatowicz , Philip R. Clark
IPC分类号： G01V3/00 , G01R33/00 , G01R33/12
CPC分类号： G01R33/0041 , G01C19/62 , G01R33/1284 , G01R33/26
摘要： One embodiment of the invention includes an atomic sensing system. The system includes an atomic sensing device configured to generate an output signal along an output axis in response to a plurality of control parameters. The system also includes a signal generator configured to apply a reference signal to a cross-axis that is approximately orthogonal to the output axis. The system also includes a phase measurement system configured to demodulate the output signal relative to the reference signal to measure a relative phase alignment between the output axis and a physical axis of the atomic sensing device based on the reference signal.
摘要翻译：本发明的一个实施例包括原子感测系统。该系统包括原子感测装置，其被配置为响应于多个控制参数沿着输出轴产生输出信号。该系统还包括信号发生器，该信号发生器被配置为将参考信号施加到大致正交于输出轴的交叉轴。该系统还包括相位测量系统，其被配置为相对于参考信号解调输出信号，以基于参考信号来测量原子感测装置的输出轴和物理轴之间的相对相位对准。

10. 发明授权

US09970999B2 Nuclear magnetic resonance probe system 有权
公开(公告)号：US09970999B2
公开(公告)日：2018-05-15
申请号：US13907293
申请日：2013-05-31
申请人： Michael S. Larsen , Henry C. Abbink , Thad G. Walker , Michael D. Bulatowicz
发明人： Michael S. Larsen , Henry C. Abbink , Thad G. Walker , Michael D. Bulatowicz
IPC分类号： G01R33/26 , G01R33/32 , G01C19/62
CPC分类号： G01R33/26 , G01C19/62 , G01R33/323
摘要： One embodiment includes a nuclear magnetic resonance (NMR) sensor system. The system includes a pump laser configured to generate an optical pump beam at a first wavelength and a probe laser configured to generate an optical probe beam at a second wavelength that is different from the first wavelength. The system also includes beam optics configured to direct the pump laser and the probe laser along orthogonal axes through a sensor cell comprising an alkali metal vapor. The system further includes detection optics that include a photodetector assembly configured to measure at least one characteristic associated with the optical probe beam leaving the sensor cell for measurement of a polarization vector of the alkali metal vapor. The detection optics can include at least one filter configured to filter light having the first wavelength and to pass light having the second wavelength to the photodetector assembly.

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