公开(公告)号：US11698323B2

公开(公告)日：2023-07-11

申请号：US16821356

申请日：2020-03-17

Applicant: Palo Alto Research Center Incorporated

Inventor： Spenser Anderson ,  Hong Yu ,  Peter Kiesel ,  Ajay Raghavan

IPC: G01M5/00 ,  G01B11/16 ,  G06N5/022 ,  G06N7/01

CPC classification number: G01M5/0033 ,  G01B11/16 ,  G06N5/022 ,  G06N7/01

Abstract: A set of load responses of an asset for a sample of traffic loading events caused by objects of unknown weight is measured. At least one statistical parameter is determined from the set of load responses. A corresponding statistical parameter of known object weights loading the asset is determined. An object weight is assigned to a load response of the set of load responses based on correlation of the extracted statistical parameter to the corresponding statistical parameter.

公开(公告)号：US20230213570A1

公开(公告)日：2023-07-06

申请号：US17567538

申请日：2022-01-03

Applicant: Palo Alto Research Center Incorporated

Inventor： Jacob N. Chamoun ,  Peter Kiesel ,  Saman Mostafavi ,  Qiushu Chen

IPC: G01R31/12 ,  G02B6/42

CPC classification number: G01R31/1218 ,  G02B6/4286

Abstract: A system for evaluating a high voltage asset (HV asset) comprises a PD detector disposed in the HV asset. The PD detector comprises an electrical coupler configured to couple electrical disturbances indicative of a partial discharge from a high voltage conductor of the HV asset to an electrical-to-optical converter. The electrical-to-optical converter comprises a light emitter, and is configured to convert the electrical disturbances to a light signal. An optical power receiver is disposed in the high voltage asset and coupled to the PD detector. The optical power receiver is configured to receive optical power from an external optical power source via a non-conducting optical fiber arrangement. The electrical-to-optical converter is configured to communicate the light signal indicative of the partial discharge to an electronic device external of high voltage asset via the non-conducting optical fiber arrangement.

公开(公告)号：US11555864B2

公开(公告)日：2023-01-17

申请号：US17513255

申请日：2021-10-28

Applicant: Palo Alto Research Center Incorporated

Inventor： Saman Mostafavi ,  Hong Yu ,  Ajay Raghavan ,  Peter Kiesel

IPC: G01R29/20 ,  G01R31/62 ,  G01J3/18 ,  G01L1/24 ,  H01F27/08 ,  H04B3/46 ,  G01N17/00 ,  H01F27/02 ,  G01R19/25 ,  G01R35/02 ,  G01R31/72 ,  G01R31/52 ,  G01R1/28 ,  G01R31/34 ,  G01R15/20

Abstract: A monitoring system includes an array of optical sensors disposed within a transformer tank. Each optical sensor is configured to have an optical output that changes in response to a temperature within the transformer tank. An analyzer is coupled to the array of optical sensors. The analyzer is configured to determine a sensed temperature distribution based on the sensed temperature. The sensed temperature distribution is compared to an expected distribution. Exterior contamination of the transformer tank is detected based on the comparison.

公开(公告)号：US20220334336A1

公开(公告)日：2022-10-20

申请号：US17235311

申请日：2021-04-20

Applicant: Palo Alto Research Center Incorporated

Inventor： Jacob N. Chamoun ,  Qiushu Chen ,  Peter Kiesel ,  Kyle Arakaki

IPC: G02B6/44 ,  G01N21/896 ,  G01L5/04

Abstract: An apparatus includes a cassette configured to hold optical fiber comprising one or more optical sensors. The cassette comprises a spool configured to one or more of extract and retract the optical fiber from the cassette. A fiber monitor is coupled to the cassette. The fiber monitor is configured to monitor at least one parameter of the optical fiber as the optical fiber is extracted from the cassette.

公开(公告)号：US20220170846A1

公开(公告)日：2022-06-02

申请号：US17108314

申请日：2020-12-01

Applicant: Palo Alto Research Center Incorporated

Inventor： Qiushu Chen ,  Peter Kiesel ,  Jacob N. Chamoun ,  Norman Nan Shi ,  Noble M. Johnson

IPC: G01N21/21 ,  G01N21/64

Abstract: An analyzing system includes a fluidic stream that guides an analyte in a detection area where the analyte emits or transmits light. One or more polarizing elements polarize the light into respective two or more different polarization components. One or more optical detectors receive the respective two or more polarization components and generate respective at least two signals in response. A processor is coupled to the optical detectors and configured to determine the polarization status of the light from the object based on the signals.

公开(公告)号：US11163064B1

公开(公告)日：2021-11-02

申请号：US16927550

申请日：2020-07-13

Applicant: Palo Alto Research Center Incorporated

Inventor： John Knights ,  Alex Hegyi ,  Peter Kiesel

IPC: G01S17/894 ,  G01S7/481 ,  G01S17/58

Abstract: A system comprises an imaging device that includes a two dimensional array of pixels. Each pixel of the array includes a first optical filter having a first pass band arranged to filter excitation light reflected by a moving object and a first detector configured to detect light transmitted through the first optical filter and to generate a first electrical signal. Each pixel of the array also includes a second optical filter having a second pass band arranged to filter excitation light reflected by a moving object and a second detector configured to detect light transmitted through the second optical filter and to generate a second electrical signal. The imaging device further includes circuitry that generates output signals from each of the pixels based on the first electrical signal and the second electrical signal of the pixel. The output signal includes information about the speed and direction of the moving object.

公开(公告)号：US11067610B2

公开(公告)日：2021-07-20

申请号：US16235754

申请日：2018-12-28

Applicant: Palo Alto Research Center Incorporated

Inventor： Todd Karin ,  Peter Kiesel ,  Ajay Raghavan

IPC: G01R19/25 ,  G01R15/16 ,  G01R15/22 ,  G01R19/00 ,  G01R19/252 ,  G01R31/12

Abstract: A partial discharge (PD) detection system includes a PD sensor configured to sense a PD event of an electrical system and to generate a sensor signal in response to the PD event. An envelope generator is coupled to receive the sensor signal from the PD sensor. The envelope generator extracts an envelope signal from the sensor signal. A digitizer is configured to convert the envelope signal to a digital representation of the PD event.

公开(公告)号：US20210199496A1

公开(公告)日：2021-07-01

申请号：US16730333

申请日：2019-12-30

Applicant: Palo Alto Research Center Incorporated

Inventor： Peter Kiesel ,  Philipp Schmaelzle ,  Konrad Bellmann ,  Markus Beck

IPC: G01J1/04 ,  G01B11/14 ,  G01H9/00 ,  G01L1/24 ,  G02B3/00 ,  G02B6/42

Abstract: A sensing device includes an aperture structure having an aperture and imaging optics configured to direct polychromatic light toward the aperture. The imaging optics separates the light according to spectral range longitudinally along a first axis The aperture substantially transmits a spectral range of the light and substantially blocks other spectral ranges of the light. An optical detector is arranged to receive the spectral range of the light that is transmitted through the aperture. The optical detector generate an electrical output that corresponds to a centroid of the spectral range of the light.

公开(公告)号：US20210167427A1

公开(公告)日：2021-06-03

申请号：US17106726

申请日：2020-11-30

Applicant: Palo Alto Research Center Incorporated

Inventor： Anurag Ganguli ,  Julian Schwartz ,  Ajay Raghavan ,  Peter Kiesel ,  Bhaskar Saha ,  Saroj Sahu ,  Lars Wilko Sommer

IPC: H01M10/42 ,  H01M10/48 ,  G01L1/24 ,  G01R31/392 ,  G01D3/036 ,  G01D5/353

Abstract: A system includes a first optical sensor sensitive to both a parameter of interest, Parameter1, and at least one confounding parameter, Parameter2 and a second optical sensor sensitive only to the confounding parameter. Measurement circuitry measures M1 in response to light scattered by the first optical sensor, where M1=value of Parameter1+K*value of Parameter2. The measurement circuitry also measures M2 in response to light scattered by the second optical sensor, where M2=value of Parameter2. Compensation circuitry determines a compensation factor, K, for the confounding parameter based on measurements of M1 and M2 taken over multiple load/unload cycles or over one or more thermal cycles. The compensation factor is used to determine the parameter of interest.

公开(公告)号：US10854932B2

公开(公告)日：2020-12-01

申请号：US14810919

申请日：2015-07-28

Applicant: Palo Alto Research Center Incorporated

Inventor： Anurag Ganguli ,  Julian Schwartz ,  Ajay Raghavan ,  Peter Kiesel ,  Bhaskar Saha ,  Saroj Sahu ,  Lars Wilko Sommer

IPC: H01M10/42 ,  H01M10/48 ,  G01L1/24 ,  G01R31/392 ,  G01D3/036 ,  G01D5/353

Abstract: A system includes a first optical sensor sensitive to both a parameter of interest, Parameter1, and at least one confounding parameter, Parameter2 and a second optical sensor sensitive only to the confounding parameter. Measurement circuitry measures M1 in response to light scattered by the first optical sensor, where M1=value of Parameter1+K*value of Parameter2. The measurement circuitry also measures M2 in response to light scattered by the second optical sensor, where M2=value of Parameter2. Compensation circuitry determines a compensation factor, K, for the confounding parameter based on measurements of M1 and M2 taken over multiple load/unload cycles or over one or more thermal cycles. The compensation factor is used to determine the parameter of interest.