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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：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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Patent Agency Ranking
公开(公告)号：US20220190614A1
公开(公告)日：2022-06-16
申请号：US17382279
申请日：2021-07-21
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung , Chiwook Park
IPC: H02J7/00 , G01R31/392 , H02J50/10 , H01M10/48
Abstract: Disclosed is a system and methods for measuring electrochemical state of rechargeable batteries such as state of charge (SoC) and state of health (SoH). In various aspects, the system may include an inductive coil attached to the battery and a battery current sensor. Alternating current with a fixed frequency is applied to the coil to generate magnetic fields, and the magnetic fields induce losses including Eddy current loss and a loss related to battery currents. The system compensates for the effect of the loss related to battery currents for battery electrochemical state estimation. In another aspect, the system uses both coil-based measurement and ampere hour counting (AHC) measurement for SoC measurement. The system conducts coil-based SoC measurement only occasionally to reset the accumulated error of AHC-based SoC measurement. In yet another aspect, the system combines coil-based measurement with other measurements.
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公开(公告)号：US10340406B2
公开(公告)日：2019-07-02
申请号：US15785411
申请日：2017-10-16
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung , Bongchan Kim
IPC: H03H15/02 , H01L31/08 , H01L27/144 , H01L31/101
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：US20190004122A1
公开(公告)日：2019-01-03
申请号：US16103911
申请日：2018-08-14
Applicant: Purdue Research Foundation , AccuPS Inc.
Inventor： Byunghoo Jung , Mohit Singh
IPC: G01R33/02
Abstract: An apparatus and method of wireless position sensing determining the location of a receiver relative to a transmitter in a three dimensional space and correlating that location to and interacting with a display device. The system includes a transmitting coil having a known orientation with respect to the earth's coordinate system and configured to transmit a periodic signal during a positioning event, at least one receiver including a sensing unit for measuring the magnetic field vector produced by the transmitting coil and the orientation of the receiver with respect to the earth's coordinate system, and at least one computing unit configured to estimate a position and orientation of the receiver with respect to the transmitter's coordinate system using the measured magnetic field vector, the measured orientation with respect to the earth's coordinate system, and the known orientation of the transmitting coil with respect to the earth's coordinate system.
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公开(公告)号：US10101408B2
公开(公告)日：2018-10-16
申请号：US14697008
申请日：2015-04-27
Applicant: Purdue Research Foundation
Inventor： Byunghoo Jung , Mohit Singh
Abstract: A positioning system for determining the location of a receiver relative to a transmitter. The system includes a transmitting coil having a known orientation with respect to the earth's coordinate system and configured to transmit a periodic signal during a positioning event, at least one receiver including a sensing unit for measuring the magnetic field vector produced by the transmitting coil and the orientation of the receiver with respect to the earth's coordinate system, and at least one computing unit configured to estimate a position and orientation of the receiver with respect to the transmitter's coordinate system using the measured magnetic field vector, the measured orientation with respect to the earth's coordinate system, and the known orientation of the transmitting coil with respect to the earth's coordinate system.
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公开(公告)号：US12253545B2
公开(公告)日：2025-03-18
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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