FR3117603B1 - Multi-carrier reflectometry method and system taking into account signal attenuation and distortion - Google Patents

Multi-carrier reflectometry method and system taking into account signal attenuation and distortion Download PDF

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Publication number
FR3117603B1
FR3117603B1 FR2013231A FR2013231A FR3117603B1 FR 3117603 B1 FR3117603 B1 FR 3117603B1 FR 2013231 A FR2013231 A FR 2013231A FR 2013231 A FR2013231 A FR 2013231A FR 3117603 B1 FR3117603 B1 FR 3117603B1
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FR
France
Prior art keywords
signal
cable
distortion
signals
quantization noise
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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FR2013231A
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French (fr)
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FR3117603A1 (en
Inventor
Esteban Cabanillas
Antoine Dupret
Hugues Duvillier
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Priority to FR2013231A priority Critical patent/FR3117603B1/en
Publication of FR3117603A1 publication Critical patent/FR3117603A1/en
Application granted granted Critical
Publication of FR3117603B1 publication Critical patent/FR3117603B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/088—Aspects of digital computing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

L’invention consiste en une méthode de pré-distorsion du signal avant son injection dans le câble de manière à prendre en compte les effets liés à l’atténuation et à la dispersion du signal ainsi que les effets liés au bruit de quantification de l’équipement de mesure. La pré-distorsion (800,801) consiste à appliquer une fonction d’amplification particulière en fréquence au signal dans le domaine fréquentiel de manière à amplifier les basses fréquences du signal avec un facteur dépendant du coefficient d’atténuation du signal dans le câble et à amplifier les hautes fréquences avec un niveau constant. Pour minimiser l’impact du bruit de quantification, le signal est décomposé (801) en une somme de signaux ayant chacun un niveau d’amplification constant dans une bande de fréquences donnée, les signaux étant injectés successivement dans le câble et les différentes intercorrélations réalisées sur les signaux réfléchis étant ensuite sommées. De cette manière, le bruit de quantification est moyenné et le rapport signal à bruit global est augmenté. Figure 8The invention consists of a method of pre-distorting the signal before it is injected into the cable so as to take into account the effects linked to the attenuation and dispersion of the signal as well as the effects linked to the quantization noise of the measuring equipment. Pre-distortion (800,801) consists in applying a particular frequency amplification function to the signal in the frequency domain so as to amplify the low frequencies of the signal with a factor depending on the attenuation coefficient of the signal in the cable and to amplify high frequencies with a constant level. To minimize the impact of quantization noise, the signal is decomposed (801) into a sum of signals each having a constant amplification level in a given frequency band, the signals being injected successively into the cable and the various intercorrelations carried out on the reflected signals being then summed. In this way, the quantization noise is averaged and the overall signal-to-noise ratio is increased. Picture 8

FR2013231A 2020-12-15 2020-12-15 Multi-carrier reflectometry method and system taking into account signal attenuation and distortion Expired - Fee Related FR3117603B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR2013231A FR3117603B1 (en) 2020-12-15 2020-12-15 Multi-carrier reflectometry method and system taking into account signal attenuation and distortion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2013231A FR3117603B1 (en) 2020-12-15 2020-12-15 Multi-carrier reflectometry method and system taking into account signal attenuation and distortion
FR2013231 2020-12-15

Publications (2)

Publication Number Publication Date
FR3117603A1 FR3117603A1 (en) 2022-06-17
FR3117603B1 true FR3117603B1 (en) 2022-12-16

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FR2013231A Expired - Fee Related FR3117603B1 (en) 2020-12-15 2020-12-15 Multi-carrier reflectometry method and system taking into account signal attenuation and distortion

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FR (1) FR3117603B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3000805A1 (en) * 2013-01-04 2014-07-11 Commissariat Energie Atomique METHOD OF ANALYZING A CABLE BY COMPENSATING THE DISPERSION SUBJECT TO A SIGNAL DURING ITS PROPAGATION IN SAID CABLE
FR3026848B1 (en) * 2014-10-02 2018-01-05 Commissariat A L'energie Atomique Et Aux Energies Alternatives METHOD FOR ANALYZING A CABLE BASED ON SELF-ADAPTIVE CORRELATION FOR DETECTING NON-FRAUD DEFECTS
FR3060129B1 (en) * 2016-12-14 2020-06-19 Commissariat A L'energie Atomique Et Aux Energies Alternatives METHOD FOR CALCULATING A REFLECTOGRAM FOR THE ANALYSIS OF DEFECTS IN A TRANSMISSION LINE
FR3095700B1 (en) * 2019-04-30 2021-04-02 Centralesupelec Method for detecting non-blunt faults in a cable by principal component analysis

Also Published As

Publication number Publication date
FR3117603A1 (en) 2022-06-17

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