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1.发明申请Methods and Apparatus for Magnetic Sensor with Integrated Calibration Mechanism 有权具有集成校准机制的磁传感器的方法和装置公开(公告)号：US20170067980A1
公开(公告)日：2017-03-09
申请号：US14848731
申请日：2015-09-09
CPC分类号： G01R33/093 , G01R33/0035
摘要： Methods and apparatus for magnetic sensors and integrated calibration. In an example arrangement, a system includes a magnetic sensor configured to output a signal corresponding to magnetic fields; a calibration trace disposed proximal to the magnetic sensor; a controlled current source coupled to the calibration trace and configured to output a current resulting in a magnetic field output from the calibration trace; and a comparator coupled to the output signal from the magnetic sensor and to an expected signal. In the example arrangement, the comparator outputs a signal indicating whether the output signal from the magnetic sensor corresponds to the expected signal. Methods are also disclosed.
摘要翻译： 磁传感器和集成校准的方法和装置。 在一个示例性配置中，系统包括：一个磁传感器，被配置为输出对应于磁场的信号; 设置在所述磁传感器附近的校准轨迹; 耦合到所述校准轨迹并被配置为输出导致从所述校准轨迹输出的磁场的电流的受控电流源; 以及耦合到来自磁传感器的输出信号和预期信号的比较器。 在该示例性配置中，比较器输出指示来自磁传感器的输出信号是否对应于预期信号的信号。 还公开了方法。
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2.发明申请REMOVAL OF HIGHER ORDER MAGNETIC INTERFERENCE IN MAGNETIC FIELD BASED CURRENT SENSORS 审中-公开基于磁场的电流传感器去除较高级的磁性干扰公开(公告)号：US20160356819A1
公开(公告)日：2016-12-08
申请号：US14941319
申请日：2015-11-13
CPC分类号： G01R15/20 , G01R19/0053 , G01R19/0092
摘要： A system for measuring current includes a conductive trace comprising N substantially parallel straight sections having a substantially constant cross-section, N≧4. Adjacent substantially straight sections are spaced apart by a given distance and each pair of adjacent straight sections is connected by a respective loop of the current trace such that current in odd-numbered straight sections flows in a first direction and current in even-numbered straight sections flows in an opposite direction. The N magnetic field based current sensors are each positioned on a respective straight section of the conductive trace. The current is calculated as ( S ( 1 ) - ( N 1 ) S ( 2 ) + ( N 2 ) S ( 3 ) - … - ( N N - 2 ) S ( N - 2 ) + ( N N - 1 ) S ( N - 1 ) - S ( N ) ) 2 ( N - 1 ) ; ( N k ) = NI ( N - k ) k , , and S(i) is the measured signal read at magnetic field based current sensor i.
摘要翻译： 并且S（i）是在基于磁场的电流传感器i上读取的测量信号。
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公开(公告)号：US09778327B2
公开(公告)日：2017-10-03
申请号：US14848731
申请日：2015-09-09
CPC分类号： G01R33/093 , G01R33/0035
摘要： Methods and apparatus for magnetic sensors and integrated calibration. In an example arrangement, a system includes a magnetic sensor configured to output a signal corresponding to magnetic fields; a calibration trace disposed proximal to the magnetic sensor; a controlled current source coupled to the calibration trace and configured to output a current resulting in a magnetic field output from the calibration trace; and a comparator coupled to the output signal from the magnetic sensor and to an expected signal. In the example arrangement, the comparator outputs a signal indicating whether the output signal from the magnetic sensor corresponds to the expected signal. Methods are also disclosed.
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公开(公告)号：US11487381B2
公开(公告)日：2022-11-01
申请号：US16512020
申请日：2019-07-15
发明人： Wei-Yan Shih , Steve Kummerl , Mark Stephen Toth , Alok Lohia , Terry Lee Sculley , Seung Bae Lee , Scott Robert Summerfelt
摘要： An integrated force sensing element includes a piezoelectric sensor formed in an integrated circuit (IC) chip and a strain gauge at least partially overlying the piezoelectric sensor, where the piezoelectric sensor is able to flex. A human-machine interface using the integrated force sensing element is also disclosed and may include a conditioning circuit, temperature gauge, FRAM and a processor core.
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公开(公告)号：US20210072185A1
公开(公告)日：2021-03-11
申请号：US16950227
申请日：2020-11-17
IPC分类号： G01N27/82
摘要： A method includes pulsating a magnetic field at a first location associated with an external surface of a wall containing magnetic material. The method also includes measuring at least one characteristic of the pulsating magnetic field at a second location associated with the external surface of the wall. The at least one characteristic changes based on corrosion on an internal surface the wall between the first and second locations. The magnetic field could be pulsated by applying an AC signal to a conductive coil or by vibrating a magnet. The method could also include analyzing the at least one measured characteristic to identify an amount of the corrosion and/or a change in the amount of the corrosion. Use of the internal surface the wall could be modified based on the amount or change of the corrosion.
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公开(公告)号：US20170192078A1
公开(公告)日：2017-07-06
申请号：US14995521
申请日：2016-01-14
CPC分类号： G01R35/005 , G01N1/00 , G01N2201/00 , G01R33/0035 , G01R33/07 , H04J1/00
摘要： A closed-loop calibration scheme is configured to allow a device to remain in continuous operation. A signal generator device provides a pseudorandom sequence for a signal received by a magnetic field magnetic field sensor, such as a Hall-effect sensor. A signal decoder circuit receives the output signal and decouples the generated spread spectrum signal from the interference by measuring the gain in the overall signal. The decoder device distinguishes the known spread spectrum signal from any perturbation effects of particular bandwidths. A processing circuit then outputs a signal that has an operation parameter that has been adjusted to compensate for the perturbation effects. The processing circuit provides the receiver circuit with the compensation signal, hence forming a closed-loop calibration configuration.
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公开(公告)号：US20170123548A1
公开(公告)日：2017-05-04
申请号：US14926265
申请日：2015-10-29
发明人： Wei-Yan Shih , Steve Kummerl , Mark Stephen Toth , Alok Lohia , Terry Lee Sculley , Seung Bae Lee , Scott Robert Summerfelt
IPC分类号： G06F3/041
CPC分类号： G06F3/0414 , G06F3/0416
摘要： An integrated force sensing element includes a piezoelectric sensor formed in an integrated circuit (IC) chip and a strain gauge at least partially overlying the piezoelectric sensor, where the piezoelectric sensor is able to flex. A human-machine interface using the integrated force sensing element is also disclosed and may include a conditioning circuit, temperature gauge, FRAM and a processor core.
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公开(公告)号：US20170059627A1
公开(公告)日：2017-03-02
申请号：US14986121
申请日：2015-12-31
CPC分类号： G01R15/185 , G01R15/207 , G01R19/0092 , G01R33/04
摘要： Operating a current sensor by conducting a current serially through a first region and a second region of an electrically conductive member. A first magnetic field produced by the current in the first region is sensed using a first magnetic field based current (MFBC) sensor having a first sensitivity. The sensitivity of a second MFBC is reduced. A second magnetic field produced by the current in the second region is sensed using the second MFBC sensor having a reduced sensitivity, in which the reduced sensitivity is lower than the first sensitivity. A magnitude of the current is calculated based on the first magnetic field and the second magnetic field. A dynamic range of the current sensor is extended by calculating a magnitude of the current using the second magnetic field after the first MFBC is saturated.
摘要翻译： 通过串联地导通电流通过导电构件的第一区域和第二区域来操作电流传感器。 使用具有第一灵敏度的第一基于磁场的电流（MFBC）传感器来感测由第一区域中的电流产生的第一磁场。 第二MFBC的灵敏度降低。 使用具有降低的灵敏度的第二MFBC传感器来感测由第二区域中的电流产生的第二磁场，其中灵敏度降低到低于第一灵敏度。 基于第一磁场和第二磁场计算电流的大小。 通过在第一MFBC饱和之后计算使用第二磁场的电流的幅度来扩展电流传感器的动态范围。
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公开(公告)号：US11493478B2
公开(公告)日：2022-11-08
申请号：US16950227
申请日：2020-11-17
IPC分类号： G01N27/82
摘要： A method includes pulsating a magnetic field at a first location associated with an external surface of a wall containing magnetic material. The method also includes measuring at least one characteristic of the pulsating magnetic field at a second location associated with the external surface of the wall. The at least one characteristic changes based on corrosion on an internal surface the wall between the first and second locations. The magnetic field could be pulsated by applying an AC signal to a conductive coil or by vibrating a magnet. The method could also include analyzing the at least one measured characteristic to identify an amount of the corrosion and/or a change in the amount of the corrosion. Use of the internal surface the wall could be modified based on the amount or change of the corrosion.
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公开(公告)号：US20190339806A1
公开(公告)日：2019-11-07
申请号：US16512020
申请日：2019-07-15
发明人： Wei-Yan Shih , Steve Kummerl , Mark Stephen Toth , Alok Lohia , Terry Lee Sculley , Seung Bae Lee , Scott Robert Summerfelt
IPC分类号： G06F3/041
摘要： An integrated force sensing element includes a piezoelectric sensor formed in an integrated circuit (IC) chip and a strain gauge at least partially overlying the piezoelectric sensor, where the piezoelectric sensor is able to flex. A human-machine interface using the integrated force sensing element is also disclosed and may include a conditioning circuit, temperature gauge, FRAM and a processor core.
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