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公开(公告)号：US20250060401A1
公开(公告)日：2025-02-20
申请号：US18725174
申请日：2022-10-11
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Masato IZAWA , Satoru SAKURAZAWA , Isao KATO , Shota SHIMIZU , Takashi MAEHATA
Abstract: A detection device includes a signal output unit configured to output a 1-bit first digital signal representing a waveform of a predetermined pattern or a signal based on the first digital signal to a transmission line as a measurement signal, a signal reception unit configured to receive a response signal including a signal reflecting the measurement signal from the transmission line and convert the response signal into a 1-bit second digital signal, an operation unit configured to perform a logical operation of the second digital signal converted by the signal reception unit and a 1-bit third digital signal based on the predetermined pattern, and a detection unit configured to detect an abnormality of the transmission line, based on an operation result obtained by the operation unit.
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公开(公告)号：US20240426893A1
公开(公告)日：2024-12-26
申请号：US18341047
申请日：2023-06-26
Applicant: International Business Machines Corporation
Inventor： Samuel R. Conner , Matteo Cocchini , Matthew Doyle , Stuart Brett Benefield
Abstract: Computer-implemented methods for performing enhanced resolution time-domain reflectometry are provided. Aspects include obtaining a plurality of waveforms by transmitting a first pulse on a transmission line, transmitting a second pulse on the transmission line, where the second pulse is transmitted after the first pulse by a delay, and capturing and measuring reflections of the transmitted pulses, wherein the delay corresponding to each of the plurality of waveforms is different. Aspects also include identifying a discontinuity of the transmission line based at least in part on the plurality of waveforms. Based on a determination that the transmission line includes the discontinuity, aspects include calculating third derivative curves for each of the plurality of waveforms and calculating a length of the discontinuity of the transmission line based on the third derivative curves. Aspects also include creating a notification indicating a location and the length of the discontinuity of the transmission line.
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公开(公告)号：US12145636B2
公开(公告)日：2024-11-19
申请号：US17917480
申请日：2021-04-09
Applicant: HATCH LTD.
Inventor： Patrick Henry McGinn , Mark James Mitchell , Matthew Douglas Brown , Matthew Gorczyca , Michael Morgan Campbell
IPC: B61K9/08 , B60M3/00 , B61D15/12 , B61L27/53 , G01R31/00 , G01R31/11 , G01R31/52 , G01R33/00 , G01R33/028 , G01R33/04 , G01R33/07 , G01R33/09
Abstract: A method, device, and system for detecting a current leak in a traction power rail. Magnetic or electrical properties of the rail are measured. The measurements are performed using a rail instrument that senses the properties around the rail at various times while the instrument is being moved down the rail, such as using a cart or train. The rail instrument may be a flux concentrator or open Rogowski coil. The locations of the rail, about which the readings are taken by the rail instrument, may be determined and correlated with the measurements themselves. The method may comprise measuring the magnetic field of the rail along a length of the rail, and identifying a leak based on differences between the magnetic field measurements. The system may comprise a cart comprising the rail instrument and a location instrument.
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公开(公告)号：US20240255560A1
公开(公告)日：2024-08-01
申请号：US18424125
申请日：2024-01-26
Applicant: Microchip Technology Incorporated
Inventor： Jiachi Yu , Dixon Chen , Kevin Yang , Markus N. Becht
CPC classification number: G01R31/11 , G01R31/083 , G01R31/088 , G01R31/52 , G01R31/58
Abstract: Cable fault detection using reconstructed reflection signals and related systems, methods, and devices are disclosed. An apparatus includes a terminal to provision and observe a signal on the cable and a processing circuitry. The processing circuitry may reconstruct a reflection signal at least partially responsive to the observed signal, generate correlation values between the reconstructed reflection signal and multiple signals representing the transmit signal as variably delayed; and determine whether a fault is present in the cable at least partially responsive to the correlation values.
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公开(公告)号：US11994021B2
公开(公告)日：2024-05-28
申请号：US16963460
申请日：2018-02-20
Applicant: HALLIBURTON ENERGY SERVICES, INC.
Inventor： Imran Sharif Vehra , Christopher Golla , Matthew Chase Griffing , Zinovy B. Krugliak
Abstract: An apparatus, method, and system for determining the propagation delay for a downhole wire and/or for monitoring the integrity of a downhole wire. The apparatus includes a first tool component and a second tool component spaced apart from the first tool component and communicatively coupled by a wire. The tool components include impedance altering devices configured to alter, for a predetermined period of time, either the source impedance at a first termination point of the wire and/or the load impedance at a second termination point of the wire sufficient to generate a characteristic signal reflection upon the transmission of a signal along a length of the wire between the first tool component and the second tool component.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240118331A1
公开(公告)日：2024-04-11
申请号：US18376097
申请日：2023-10-03
Inventor： Nicolas RAVOT , Baudouin NALINE , Pierre BLANCHART , Nicolas GREGIS
CPC classification number: G01R31/088 , G01R31/085 , G01R31/11
Abstract: A novel method for automatically analyzing reflectograms in order to classify impedance discontinuities detected via their temporal or spectral signatures into various categories relating to potential faults or other physical elements present on the cable. A method for detecting the mutual influence of neighboring pulses in a reflectogram in order to separate them so as to isolate them and characterize each pulse accurately.
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公开(公告)号：US11898927B2
公开(公告)日：2024-02-13
申请号：US17735025
申请日：2022-05-02
Applicant: Tektronix, Inc.
Inventor： Kan Tan
CPC classification number: G01M11/3118 , G01M11/3145 , G01R27/06
Abstract: A test and measurement device includes one or more ports configured to connect to a device under test (DUT), a time domain reflectometry (TDR) source configured receive a source control signal and to produce an incident signal to be applied to the DUT, one or more analog-to-digital converters (ADC) configured to receive a sample clock and sample the incident signal from the TDR source and a time domain reflection (TDR) signal or a time domain transmission (TDT) signal from the DUT to produce an incident waveform and a TDR/TDT waveform, one or more processors configured to execute code to cause the one or more processors to: control a clock synthesizer to produce the sample clock and the source control signal, and use a period of the TDR source, a period of the sample clock, and the number of samples to determine time locations for samples in the incident waveform and the TDR/TDT waveform, and a display configured to display the incident waveform and the TDR/TDT waveform. A method of sampling a waveform using a real-equivalent-time oscilloscope having a time domain reflectometry source, comprising: controlling a clock synthesizer to produce a sample clock and a source control signal; using a time domain reflectometry (TDR) source to receive the source control signal and to produce an incident signal to be applied to a device under test (DUT); receiving the sample clock at one or more analog-to-digital converters (ADC) and sampling the incident signal from the TDR source and a TDR/TDT signal from the DUT to produce an incident waveform and a TDR/TDT waveform; determining time locations for samples in the incident waveform and the TDR/TDT waveform, using a period of the TDR source, a period of the sample clock, and a number of samples; and displaying the incident waveform and the TDR/TDT waveform.
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公开(公告)号：US11815541B2
公开(公告)日：2023-11-14
申请号：US17670024
申请日：2022-02-11
Applicant: POMA
Inventor： Christian Paul Mathieu
CPC classification number: G01R31/11 , G01R31/085 , G01R31/088 , G01R31/2812
Abstract: A fault location system in a cable transport installation comprises a safety unit (10) and an end module (13) connected by an electrical safety line (11). The safety line (11) comprises a plurality of cable fault contacts (14) of the normally-closed type connected in series. The location system includes a plurality of location modules (20) distributed along the transport installation, each of which comprising a first test contact (21), of the normally-open type, for short-circuiting the safety line (11). Once a fault coming from one of the cable fault contacts (14) is detected, each location module (20) is capable of selectively closing its first test contact (21) so as to be able to locate said faulty contact (14) on the safety line.
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公开(公告)号：US11726136B2
公开(公告)日：2023-08-15
申请号：US17495399
申请日：2021-10-06
Applicant: TeraView Limited
Inventor： Bryan Edward Cole
IPC: G01R31/11 , G01R31/28 , G01R31/308
CPC classification number: G01R31/28 , G01R31/11 , G01R31/2822 , G01R31/308
Abstract: A reflectometer for allowing a test of a device, the reflectometer comprising: a source of pulsed radiation; a first photoconductive element configured to output a pulse in response to irradiation from the pulsed source; a second photoconductive element configured to receive a pulse; and a transmission line arrangement configured to direct the pulse from the first photoconductive element to the device under test and to direct the pulse reflected from the device under test to the second photoconductive element. At least one of the first and second photoconductive elements is provided on a different substrate to that of the transmission line arrangement.
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公开(公告)号：US20230050241A1
公开(公告)日：2023-02-16
申请号：US17795997
申请日：2021-01-29
Applicant: University of Rhode Island Board of Trustees
Inventor： Ken Qing Yang , Tao Wei , Zhenyu Xu
Abstract: Method and apparatus for detecting in impedance change in a transmission line, such as a line in a computer bus. A CMOS-compatible time domain reflectometer circuit comprising a comparator is embedded in one or more chips and connected to the transmission line. The circuit measures the impedance inhomogeneity pattern (IIP) of the transmission line prior to use, and then repeatedly measures the HP during operation of the transmission line to detect a change in IIP, without Interfering with data transfer through the transmission line. The present invention can detect and locate wire-tapping magnetic probing or snooping, and Trojan and cold boot attacks on interconnecting buses between computer chips or integrated circuits in a computer system, such as on external memory buses.
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