公开(公告)号：US11519975B2

公开(公告)日：2022-12-06

申请号：US17520745

申请日：2021-11-08

申请人： Institute of Geology and Geophysics, Chinese Academy of Sciences

发明人： Kaixin Yuan ,  Aiming Du ,  Ying Zhang ,  Lin Zhao ,  Shuquan Sun ,  Xiao Feng ,  Zhi Li

IPC分类号： G01R33/04 ,  G01R33/02 ,  G01C17/30 ,  G01C17/28 ,  G01C17/38

摘要： An offset data acquisition method and device of a fluxgate magnetometer are provided by the present disclosure, wherein the offset data acquisition method of the fluxgate magnetometer comprises: controlling the first analog switch, the second analog switch and the third analog switch to change directions within a preset period to obtain eight switch direction combinations between the first analog switch, the second analog switch and the third analog switch; acquiring magnetic field measurement data corresponding to an each of the switch direction combinations; and the magnetic field measurement data comprises x-axis magnetic field measurement data, y-axis magnetic field measurement data and z-axis magnetic field measurement data; and acquiring the offset data based on influence factors of an offset and the magnetic field measurement data within the preset period.

公开(公告)号：US10048329B2

公开(公告)日：2018-08-14

申请号：US15305864

申请日：2015-03-12

申请人： AICHI STEEL CORPORATION

发明人： Michiharu Yamamoto ,  Tomohiko Nagao

IPC分类号： G01R33/02 ,  G01R33/06 ,  G01C17/30 ,  H01L43/02 ,  H01L43/12 ,  H01L27/22 ,  G01R33/00

摘要： A reduced size/thickness magnetic detection device includes: a substrate; and a magneto-impedance element at one substrate surface side and including a magneto-sensitive wire and a detection coil. The wire senses an external magnetic field component in a first axis direction in which the wire extends. The coil loops around the wire, and includes left-side and right-side coil parts coexisting along the wire, and a magnetic field direction changing body of soft magnetic material having at least a part at another substrate surface side or in the substrate above an intermediate position between left-side and right-side coil parts. The body can change an external magnetic field component in a third axis direction intersecting the substrate to a measurement magnetic field component in the first axis direction. The external magnetic field component in the third axis direction can be detected from a left-side coil part output and a right-side coil part output.

公开(公告)号：US09250300B2

公开(公告)日：2016-02-02

申请号：US14500796

申请日：2014-09-29

申请人： Microsoft Technology Licensing, LLC

发明人： David Russo

IPC分类号： G01R33/00 ,  A63F13/20 ,  G01C17/30 ,  A63F13/211 ,  A63F13/245 ,  G01R35/00

CPC分类号： A63F13/22 ,  A63F13/06 ,  A63F13/211 ,  A63F13/235 ,  A63F13/245 ,  A63F2300/1018 ,  G01C17/30 ,  G01R33/0035

摘要： A mobile device includes a magnetometer. The mobile device is calibrated during application usage by sampling magnetic information received from the magnetometer, recognizing an initial controller orientation signal derived from a first sample of a plurality of samples of the magnetic information and from directional offset data, calculating updated directional offset data based on the plurality of samples of the magnetic information and on the directional offset data, and deriving a calibrated controller orientation signal from a second sample of the plurality of samples of the magnetic information and the updated directional offset data.

摘要翻译： 移动设备包括磁力计。 移动设备在应用使用期间通过对从磁力计接收到的磁信息进行采样来校准，识别从磁信息的多个采样的第一采样导出的初始控制器定向信号和来自定向偏移数据的计算更新的方向偏移数据，基于 磁信息的多个采样和方向偏移数据，以及从磁信息和更新的方向偏移数据的多个样本中的第二样本导出经校准的控制器取向信号。

公开(公告)号：US09234946B2

公开(公告)日：2016-01-12

申请号：US13853812

申请日：2013-03-29

申请人： FUJIKURA LTD.

发明人： Kazuhisa Itoi

IPC分类号： G01R33/02 ,  G01R33/04 ,  G01R33/09 ,  G01C17/30

CPC分类号： G01R33/09 ,  G01C17/30 ,  G01R33/04

摘要： A semiconductor integrated circuit includes a clock-signal control circuit controlling intensity-signal output, which is output from a signal processing circuit, to be stopped in at least a forward outage time and a backward outage time. The forward outage time is previous to an apex point of a triangular wave and having 1 to 5% of a triangular wave period. The backward outage time is subsequent to the apex point of the triangular wave and having 1 to 5% of a triangular wave period.

摘要翻译： 半导体集成电路包括时钟信号控制电路，其控制从信号处理电路输出的强度信号输出至少停止在正向中断时间和后退时间。 正向停电时间先于三角波的顶点，并具有1〜5％的三角波周期。 后退时间在三角波的顶点之后，具有1〜5％的三角波周期。

公开(公告)号：US20050040818A1

公开(公告)日：2005-02-24

申请号：US10644786

申请日：2003-08-21

申请人： Phil MacPhail ,  Anatoli Pukhovski

发明人： Phil MacPhail ,  Anatoli Pukhovski

IPC分类号： G01C17/02 ,  G01C17/30 ,  G01R33/04

CPC分类号： G01C17/30

摘要： An electronic compass featuring low power consumption and small die space requirements is disclosed. The compass features an electronic circuit that provides a controlled flow of electrical current to a coil. Additionally, the circuit monitors the coil to determine when the coil becomes magnetically saturated. The duration of the magnetic saturation is monitored to determine the presence and direction of an external magnetic field.

摘要翻译： 公开了一种具有低功耗和小模具空间要求的电子罗盘。 罗盘具有电子电路，其向线圈提供受控制的电流。 此外，电路监测线圈以确定线圈何时变得磁饱和。 监测磁饱和的持续时间以确定外部磁场的存在和方向。

公开(公告)号：US20050037780A1

公开(公告)日：2005-02-17

申请号：US10605913

申请日：2003-11-05

申请人： Sheng-Jung Kuo ,  Sheng-Fang Cheng

发明人： Sheng-Jung Kuo ,  Sheng-Fang Cheng

IPC分类号： G01C17/30 ,  G01C21/20 ,  H04M1/21 ,  H04M1/725 ,  H04Q7/20

CPC分类号： H04M1/21 ,  G01C17/30 ,  G01C21/20 ,  H04M1/72522 ,  H04M2250/12

摘要： A mobile communication device includes a control unit, an output device, a memory, a digital compass, an input device, a microphone, and a speaker. These components are connected with a power source. The control unit calculates direction information with the program stored in the memory, and the direction information is transmitted from the digital compass to the output device. Even without knowledge of compass operation, a user can reference the mobile communication device displaying an accurate direction on the output device.

摘要翻译： 移动通信设备包括控制单元，输出设备，存储器，数字罗盘，输入设备，麦克风和扬声器。 这些组件与电源连接。 控制单元利用存储在存储器中的程序来计算方向信息，并且将方向信息从数字罗盘发送到输出装置。 即使没有罗盘操作的知识，用户可以参考在输出设备上显示精确方向的移动通信设备。

公开(公告)号：US5982176A

公开(公告)日：1999-11-09

申请号：US411939

申请日：1995-03-28

申请人： Yoshihisa Kawamura ,  Kazuo Kurihara ,  Zenkichi Nakamura ,  Kietsu Iwabuchi ,  Toshio Aizawa ,  Hideo Suyama

发明人： Yoshihisa Kawamura ,  Kazuo Kurihara ,  Zenkichi Nakamura ,  Kietsu Iwabuchi ,  Toshio Aizawa ,  Hideo Suyama

IPC分类号： G01C17/30 ,  G01R33/02 ,  G01R33/09 ,  G01R33/06 ,  G01C17/28 ,  G01C17/32

CPC分类号： G01R33/09 ,  G01C17/30 ,  H01J2229/0038

摘要： A geomagnetic direction sensor has a plurality of magnetic cores for converging terrestrial magnetism arranged circumferentially with pre-set gaps, and magneto-resistive effect devices in the gaps so as to lie substantially at right angles to the direction of the magnetic field in the gaps. The geomagnetic direction sensor has at least a pair of magneto-resistive effect devices lying substantially at right angles to each other. The magnetic core is formed of a magnetic material having soft magnetic properties. The current is supplied to the excitation coils placed around the magnetic core for applying a bias magnetic field to the magneto-resistive effect devices. Another set of magneto-resistive effect devices are connected in series with the magneto-resistive effect devices arranged within the gap so as to be substantially parallel to the direction of the magnetic field.

摘要翻译： 地磁方向传感器具有多个磁芯，用于会聚具有预先设定的间隙的周向布置的地磁，以及间隙中的磁阻效应器件，其基本上与间隙中的磁场方向成直角。 地磁方向传感器具有至少一对基本上彼此成直角的磁阻效应装置。 磁芯由具有软磁特性的磁性材料形成。 电流被提供给放置在磁芯周围的激励线圈，用于向磁阻效应器件施加偏置磁场。 另一组磁阻效应器件与布置在间隙内的磁阻效应器件串联连接，以便基本上平行于磁场的方向。

公开(公告)号：US5953683A

公开(公告)日：1999-09-14

申请号：US946916

申请日：1997-10-09

申请人： Per Krogh Hansen ,  Vladimir Kogan

发明人： Per Krogh Hansen ,  Vladimir Kogan

IPC分类号： G01C17/30 ,  G01B7/30 ,  G01C17/38

CPC分类号： G01C21/165 ,  G01C17/30

摘要： In a sourceless orientation sensor, the sensor measures the three orientation angles azimuth, elevation and roll in a fixed reference three-dimensional coordinate frame. The sensor utilizes a three-axis magnetic sensor to measure changes in the Earth's magnetic field in order to determine the azimuth and roll (or elevation) angles after the elevation (or roll) angle has been determined by other means. A first embodiment utilizes a separate sensor to measure the elevation (or roll) angle in a fixed reference three-dimensional coordinate frame while a three axis magnetic sensor is used to measure the Earth's magnetic field. The azimuth and the roll (or elevation) angles are then determined from these measurements. A second embodiment utilizes a combination of a three-axis accelerometer to sense the Earth's gravity to measure the absolute elevation and roll angles for slow motions and a two-axis rate sensor to measure the azimuth and elevation velocities in the sensor frame. A direct method employing translation and integration is used to find the azimuth and elevation angles in the fixed reference three-dimensional coordinate frame. The roll angle is then found from the magnetic sensor measurements. Other embodiments are disclosed.

摘要翻译： 在无源定向传感器中，传感器测量固定参考三维坐标系中的三个方位角方位角，仰角和滚动角。 传感器利用三轴磁传感器来测量地球磁场的变化，以便通过其他方式确定仰角（或滚动角度）后的方位角和倾斜角（或仰角）。 第一实施例利用单独的传感器来测量固定参考三维坐标系中的仰角（或滚动角），同时使用三轴磁传感器来测量地球的磁场。 然后从这些测量中确定方位角和滚动角（或仰角）。 第二实施例利用三轴加速度计的组合来感测地球的重力以测量用于慢速运动的绝对高程和滚动角以及用于测量传感器框架中的方位角和仰角速度的双轴速率传感器。 使用平移和积分的直接方法来找出固定参考三维坐标系中的方位角和仰角。 然后从磁传感器测量中找出滚动角度。 公开了其他实施例。

公开(公告)号：US5818226A

公开(公告)日：1998-10-06

申请号：US722614

申请日：1996-09-27

申请人： Manabu Aizawa

发明人： Manabu Aizawa

IPC分类号： G01C17/30 ,  G01R33/02 ,  G01R33/028 ,  G02F1/1362 ,  H01F5/02 ,  H01F27/28

CPC分类号： H01F5/02 ,  G01R33/028 ,  G02F1/136209

摘要： A magnetic sensor includes an elongated magnetic core and a coil wound on the periphery of the magnetic core so as to detect a magnetic field based on the change of inductance of the coil with high sensitivity and without increasing the number of turns of the coil. The number of turns of the coil in the central part of the magnetic core is larger than that of the coil at the end parts of the magnetic core. Thus, a bias field due to a bias current supplied to the coil is efficiently applied to the magnetic core. As a result, the inductance of the coil can be set to a large value without increasing the number of turns of the coil and a high sensitivity can be obtained.

摘要翻译： 磁传感器包括细长的磁芯和缠绕在磁芯周围的线圈，以便基于线圈的电感变化以高灵敏度检测磁场，并且不增加线圈的匝数。 磁芯中心部分的线圈匝数大于磁芯末端的线圈匝数。 因此，提供给线圈的偏置电流产生的偏置场有效地施加到磁芯。 结果，可以将线圈的电感设定为大的值而不增加线圈的匝数，并且可以获得高灵敏度。

公开(公告)号：US5652512A

公开(公告)日：1997-07-29

申请号：US636420

申请日：1996-04-23

申请人： Paul L. Feintuch ,  Eric K. Slater ,  Kirk Kohnen

发明人： Paul L. Feintuch ,  Eric K. Slater ,  Kirk Kohnen

IPC分类号： G01C17/30 ,  G01R33/04 ,  G01C17/28

CPC分类号： G01R33/04 ,  G01C17/30

摘要： Digital logic comprising a high speed analog to digital converter, a high speed analog to digital converter, a digital multiplier, and an infinite impulse response filter and decimation circuit are used to digitize a magnetic signal that is subsequently processed by magnetic data processing algorithms. The high resolution digital to analog converter is directly incorporated in a feedback loop of a magnetometer sensor, and an expensive precision analog to digital converter is replaced by a less expensive, lower power digital to analog converter. The improvement provided by the present invention includes a high speed analog to digital converter coupled between the oscillator and a first input of a multiplier, and a second analog to digital converter that is coupled between the sense coil of the sensor and a second input of the multiplier. The output of the multiplier is coupled to an infinite impulse response filter and decimation circuit that produces the digital output signal from the magnetometer. The output of the infinite impulse response filter and decimation circuit is coupled by way of a digital to analog converter to the feedback coil of the sensor. Depending on the system requirements, the two analog to digital converters, the digital multiplier, and the infinite impulse response filter and decimation circuit may be implemented in one readily available microcontroller at low cost. This serves to reduce the number of components, complexity, and expense of the magnetometer.

摘要翻译： 使用包括高速模数转换器，高速模数转换器，数字乘法器和无限脉冲响应滤波器和抽取电路的数字逻辑来数字化随后由磁数据处理算法处理的磁信号。 高分辨率数模转换器直接并入到磁力计传感器的反馈回路中，昂贵的精密模数转换器由较便宜的低功耗数模转换器代替。 本发明提供的改进包括耦合在振荡器和乘法器的第一输入端之间的高速模数转换器和耦合在传感器的感测线圈和第二输入端之间的第二模数转换器 乘数。 乘法器的输出耦合到产生来自磁力计的数字输出信号的无限脉冲响应滤波器和抽取电路。 无限脉冲响应滤波器和抽取电路的输出通过数模转换器耦合到传感器的反馈线圈。 根据系统要求，可以在一个容易获得的微控制器中以低成本实现两个模数转换器，数字乘法器和无限脉冲响应滤波器和抽取电路。 这用于减少磁力计的部件数量，复杂性和费用。