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公开(公告)号：US20230341446A1
公开(公告)日：2023-10-26
申请号：US17779468
申请日：2020-09-30
Applicant: Purdue Research Foundation
Inventor： Kaushik Roy , Byunghoo Jung , Chamika Mihiranga Liyanagedera
IPC: G01R21/133 , G01R21/06 , G01R21/00
CPC classification number: G01R21/1331 , G01R21/06 , G01R21/006
Abstract: A system may include a non-intrusive sensor circuitry configured to provide electrical measurement data, including, for example, current data, voltage data, power factor data, active power consumption data, reactive power consumption data, or a combination thereof. A transient event detector may sweep the electrical measurement data with a first window and a second window, the first window adjacent to the second window. The transient event detector may identify a start and end of transient activity based on electrical measurement data referenced by separate adjacent windows. The transient event detector may capture a transient activity data segment comprising a portion of the electrical measurement data between first index and the second index.
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公开(公告)号：US20180108798A1
公开(公告)日：2018-04-19
申请号：US15785411
申请日：2017-10-16
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung , Bongchan Kim
CPC classification number: H01L31/08 , H01L27/144 , H01L31/101 , H03H15/02
Abstract: A distributed photodiode with FIR filtering function enabled by a lumped transmission line is provided. The distributed photodiode includes inductors, a plurality of photodiode segments, photodiode biasing components, and termination impedance. The electrical bandwidth due to the junction parasitic capacitance of the photodiode is increased as the parasitic capacitance is absorbed in the transmission line structure. Moreover, the delay elements inherent in the transmission line enable implementation of an analog finite impulse response (FIR) filter that has equalization capability to allow a customized photodiode frequency response compensation.
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公开(公告)号：US20230152397A1
公开(公告)日：2023-05-18
申请号：US18091070
申请日：2022-12-29
Applicant: Purdue Research Foundation
Inventor： Kaushik Roy , Byunghoo Jung
CPC classification number: G01R33/098 , G01R15/205 , G01R15/207
Abstract: A method of sensing a current in a conductor includes controlling a digital to analog converter output to cancel residual offset voltage in a magnetic tunnel junction device prior to sensing the current with the magnetic tunnel junction device. The method includes switching input to the magnetic tunnel junction device between a fixed voltage and an output of a digital to analog converter while switching input to a band pass filter between a lower and an upper voltage output of the magnetic tunnel junction device. The output of the digital to analog converter is modified to provide a low-amplitude unsaturated sine-wave at an output of the band pass filter, at which point changes in the output of the band pass filter are associated with the amount of current in a sensed conductor.
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公开(公告)号：US20230021402A1
公开(公告)日：2023-01-26
申请号：US17867360
申请日：2022-07-18
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung
IPC: G01R31/392 , G01R31/367 , G01R31/382 , H01M10/48
Abstract: A method of determining state of health (SoH) of a battery is disclosed which includes receiving a predetermined open circuit voltage (VOC) vs. a state of charge (SoC) characteristics for a pristine battery, establishing a single battery model including physical diffusion characteristics and electrical characteristics based on lumped parameters thereby modeling diffusion resistance and capacitance of particles in the electrodes of the battery as well as electrical characteristics based on electrical resistance and capacitance from one electrode assembly to another, thereby generating equations describing voltage at the associated double-layers, solving the double-layer equations, thereby generating solutions for the double-layer electrical characteristics, and establishing a relationship between the solved double-layer characteristics and the SoC, thereby determining a SoH of the battery based on said relationship.
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公开(公告)号：US11946988B2
公开(公告)日：2024-04-02
申请号：US18091070
申请日：2022-12-29
Applicant: Purdue Research Foundation
Inventor： Kaushik Roy , Byunghoo Jung
CPC classification number: G01R33/098 , G01R15/205 , G01R15/207
Abstract: A method of sensing a current in a conductor includes controlling a digital to analog converter output to cancel residual offset voltage in a magnetic tunnel junction device prior to sensing the current with the magnetic tunnel junction device. The method includes switching input to the magnetic tunnel junction device between a fixed voltage and an output of a digital to analog converter while switching input to a band pass filter between a lower and an upper voltage output of the magnetic tunnel junction device. The output of the digital to analog converter is modified to provide a low-amplitude unsaturated sine-wave at an output of the band pass filter, at which point changes in the output of the band pass filter are associated with the amount of current in a sensed conductor.
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Patent Agency Ranking
公开(公告)号：US20230030682A1
公开(公告)日：2023-02-02
申请号：US17779480
申请日：2020-11-24
Applicant: Purdue Research Foundation
Inventor： Kaushik Roy , Byunghoo Jung , Chamika Mihiranga Liyanagedera
Abstract: System and methods for high accuracy, non-intrusive current sensing are provided. A system may include two magnetic field sensors configured for differential sensing. The system may further include frontend circuitry configured to remove direct current (DC) offset of the magnetic field sensors, upconvert the outputs of the magnetic field sensors, and filter out at least one frequency component from the up-converted signals. The system may receive output signals from the front-end circuitry corresponding to each sensor. The system may further calculate a differential signal based on the output signals. The system may apply optimal detection based on the differential signal and a reference signal to calculate a measurement of current flow. The system may determine a phase angle measurement between the differential signal and the reference signal to calculate a direction of the current flow in the conductor and output various measurement information related to the detected current.
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公开(公告)号：US20200182951A1
公开(公告)日：2020-06-11
申请号：US16466281
申请日：2017-12-04
Applicant: Purdue Research Foundation
Inventor： Kaushik Roy , Byunghoo Jung
Abstract: A current sensing system, comprising at least one magnetic tunnel junction device placed adjacent to a current carrying conductor electrically connected to a battery of a vehicle. The magnetic tunnel junction device is configured to measure a magnetic field around the conductor. A monitoring device is operatively connected to the magnetic tunnel junction device, wherein the monitoring device is configured to receive the magnetic field measurement and determine an estimate of the current flowing through the conductor.
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公开(公告)号：US09474909B2
公开(公告)日：2016-10-25
申请号：US13712532
申请日：2012-12-12
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung , Babak Ziaie , Wing Fai Loke
CPC classification number: A61N5/00 , A61B2090/3958 , A61N5/1049 , A61N2005/1051
Abstract: Illustrative embodiments of systems and methods for wireless magnetic tracking are disclosed. In one illustrative embodiment, a wireless magnetic tracking system may include a plurality of transmitting coils each configured to generate a magnetic field when energized, an active transponder configured to simultaneously (i) obtain measurements of the magnetic field when one of the plurality of transmitting coils is energized and (ii) transmit a wireless signal containing data concerning the measurements, and a computing device configured to (i) cause each of the plurality of transmitting coils to be sequentially energized, (ii) receive the data concerning the measurements, and (iii) determine a position and an orientation of the active transponder relative to the plurality of transmitting coils in response to the data concerning the measurements.
Abstract translation: 公开了用于无线磁跟踪的系统和方法的说明性实施例。 在一个说明性实施例中，无线磁跟踪系统可以包括多个发射线圈，每个发射线圈被配置为当被激励时产生磁场;主动转发器被配置成同时（i）当多个发射线圈中的一个发射线圈 被激励，并且（ii）发送包含关于测量的数据的无线信号，以及计算设备，被配置为（i）使得所述多个发送线圈中的每一个被顺序通电，（ii）接收关于所述测量的数据，以及（ iii）响应于关于测量的数据，确定主动应答器相对于多个发射线圈的位置和方位。
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公开(公告)号：US20150308861A1
公开(公告)日：2015-10-29
申请号：US14697042
申请日：2015-04-27
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung , Mohit Singh
IPC: G01D5/20
CPC classification number: G01R33/0206 , G01C21/20 , G01C21/206 , G01D5/2073
Abstract: A positioning system for determining the location of a receiver relative to a transmitter. The system includes two transmitting coils configured to transmit a periodic signal with a respective selected frequency during a positioning event, wherein the frequencies of the two signals transmitted by the two transmitting coils during the positioning event are different. A receiver includes a sensing unit for measuring the magnetic field vectors produced by the two simultaneously transmitting coils. A computing unit is configured to use the measured magnetic field vectors to calculate the position and orientation of the receiver with respect to the transmitter's coordinate frame.
Abstract translation: 一种用于确定接收机相对于发射机的位置的定位系统。 该系统包括两个发射线圈，其被配置为在定位事件期间以相应的选定频率传输周期性信号，其中由定位事件期间的两个发射线圈发射的两个信号的频率是不同的。 接收机包括用于测量由两个同时发送的线圈产生的磁场矢量的感测单元。 计算单元被配置为使用所测量的磁场矢量来相对于发射机的坐标系来计算接收机的位置和方位。
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公开(公告)号：US11543471B2
公开(公告)日：2023-01-03
申请号：US16466281
申请日：2017-12-04
Applicant: Purdue Research Foundation
Inventor： Kaushik Roy , Byunghoo Jung
Abstract: A current sensing system, comprising at least one magnetic tunnel junction device placed adjacent to a current carrying conductor electrically connected to a battery of a vehicle. The magnetic tunnel junction device is configured to measure a magnetic field around the conductor. A monitoring device is operatively connected to the magnetic tunnel junction device, wherein the monitoring device is configured to receive the magnetic field measurement and determine an estimate of the current flowing through the conductor.
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