WO2002082036A1 - Systeme et procede pour identifier et localiser une substance qui s'echappe dans l'environnement - Google Patents

Systeme et procede pour identifier et localiser une substance qui s'echappe dans l'environnement Download PDF

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Publication number
WO2002082036A1
WO2002082036A1 PCT/EP2002/003492 EP0203492W WO02082036A1 WO 2002082036 A1 WO2002082036 A1 WO 2002082036A1 EP 0203492 W EP0203492 W EP 0203492W WO 02082036 A1 WO02082036 A1 WO 02082036A1
Authority
WO
WIPO (PCT)
Prior art keywords
substance
optical fiber
collecting line
manifold
location
Prior art date
Application number
PCT/EP2002/003492
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Storb
Peter Jax
Original Assignee
Framatome Anp Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Framatome Anp Gmbh filed Critical Framatome Anp Gmbh
Publication of WO2002082036A1 publication Critical patent/WO2002082036A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G01M3/047—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means with photo-electrical detection means, e.g. using optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/002—Investigating fluid-tightness of structures by using thermal means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators

Definitions

  • the invention relates to a device and a method for detecting and locating a substance escaping into the environment, in particular for leak detection and leak detection in a system.
  • a leakage detection and location system (LEOS) is known in which the substance to be detected and leaked into the environment penetrates into a collecting line and is conveyed there together with a transport medium to a sensor arranged at the end of the collecting line, that detects the substance that has penetrated the manifold.
  • the manifold is connected to a pump with which cyclical, ie. H. in successive and temporally spaced-apart pumping operations, volumes of a transport medium, for example air, are conveyed through the manifold.
  • the collecting line is arranged in the vicinity of a system to be monitored, in particular along a pipeline.
  • the substance that has leaked out reaches the collecting line and penetrates it. As a result, a concentration maximum of the substance forms in the vicinity of the leak in the collecting line laid there. This concentration maximum reaches the sensor during the next pumping process. If the transport speed is known, the location of the leak can be determined from the time elapsing between the pump being switched on and the sensor responding.
  • the spatial resolution of the known system is but unsatisfactory in particular for long manifolds due to the inevitable mixing and diffusion processes during the transport of the transport medium for a number of application cases.
  • the invention is based on the object of specifying a device and a method for the detection and location of a substance escaping into the environment, the local resolution of which is improved, while at the same time being highly sensitive to detection, compared to the known leakage detection and location system or method.
  • the stated object is achieved with a device with the features of claim 1 or a method with the features of claim 6.
  • the device according to the invention comprises a manifold which is permeable to the substance and which is connected to a pump and to a sensor for the substance.
  • An optical fiber is installed in the vicinity of the collecting line, the local transmission properties of which are influenced by the material, and which is optically coupled to an optical transmitter and receiver device for measuring the transit time of the light that is coupled into and backscattered into the optical fiber.
  • the substance exiting into the environment must be suitable for changing or disrupting the transmission properties of the optical fiber at the location in question such that at least some of the light coupled into the optical fiber is scattered back at this location.
  • This measure increases the spatial resolution of the known method, since with a runtime measurement of the backscattered light spatial resolutions in the range of a few centimeters can be achieved.
  • the qualitative detection sensitivity of the sensor is supported by the high spatial resolution of the fiber-optic transit time measurement, so that when both phenomena occur, there is on the one hand a higher redundancy and on the other hand a significantly improved spatial resolution.
  • Optical fiber laid inside the manifold This ensures that only substances intended for detection with the LEOS system can act on the optical fiber, so that the redundancy of both measurement methods is increased.
  • the optical fiber is preferably connected to an optical transmitting and receiving device for measuring the temperature distribution along the optical fiber on the basis of the Raman effect.
  • this measure detects a change in the temperature distribution along the collecting line with high local resolution. This takes advantage of the fact that the exit of a substance into the environment often also leads to a change in temperature at this point, for example through exothermic or endothermic chemical reactions or through thermodynamic processes, for example cooling when the substance flows out of the plant or through evaporation.
  • a gaseous or liquid reactant is located in the interior of the collecting line, which reactant with the gas entering the collecting line reacting material exothermic or endothermic.
  • the material causes a change in the physical properties of the jacket of the optical fiber. This enables the detection of substances that do not produce a change in temperature in the environment, but only attack the fiber cladding by chemical reaction and in this way influence the proportion of the backscattered light.
  • FIG. 1 shows a device according to the invention in a schematic basic illustration
  • Figure 2 shows a section through a manifold with an optical fiber laid in this.
  • a manifold 4 is laid along a system part, in the exemplary embodiment a tube 2, which is provided with a jacket wall which is permeable to the substance A transported in the tube 2.
  • the manifold 4 is connected to a pump 6, which discontinuously conveys a fluid medium, for example a liquid, a neutral gas or a reactant R, through the manifold 4.
  • a sensor 8 is connected to the collecting line 4 at a predetermined distance from the pump 6, with which it is possible to detect a substance A which has penetrated into the collecting line 4 on a chemical or physical basis. to demonstrate the path.
  • an optical fiber 20 is laid, the transmission properties of which either through the substance A or through the heat tone q (release or removal of heat q) generated by the emerging substance A in the vicinity of the optical fiber 20, for example an exothermic or endothermic chemical reaction a reactant R, for example hydrogen, which is fed into the collecting line 4 specifically for this purpose, is locally changed.
  • a reactant R for example hydrogen
  • the optical fiber 20 can be arranged outside the collecting line 4, or at least in the vicinity thereof, as is illustrated in broken lines in FIG. 1.
  • the optical fiber 20 is connected to a pulsed light source 22, preferably a semiconductor laser, which generates light pulses P with a pulse duration in the range of a few ns at predetermined time intervals.
  • the light pulses are coupled into the optical fiber 20 via a beam splitter 24.
  • the light S (scattered light) backscattered in the optical fiber 20 is fed with the aid of the beam splitter 24 to a receiving device 26, with which the intensity of the backscattered light S can be measured integrally or wavelength-selectively depending on the transit time.
  • the propagation time of the scattered light S is a measure of the scattering location x, so that local inhomogeneities in the transmission properties of the optical fiber 20 can be inferred from the temporal intensity profile of the scattered light S.
  • the scattered light S can be caused by Rayleigh scattering (scattered light S and transmitted light P have the same frequency) as well Raman scattering (scattered light S and transmitted light P have different frequencies).
  • the former is the case when the substance A penetrating into the collecting line 4 locally damages the jacket 20b surrounding the core 20a of the optical fiber 20 by chemical reaction, and the changed transmission properties of the optical fiber 20 become noticeable by an increased scattering component ,
  • This damage or change to the jacket 20b can take place through direct action of the substance A on the jacket 20b or through an indirect action on the jacket 20b with the aid of a gaseous or liquid reactant R located in the collecting line.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne un système pour identifier et localiser une substance (A) qui s'échappe dans l'environnement, notamment pour identifier et localiser une fuite dans une installation. Ce système comprend une conduite de collecte (4), qui est perméable à ladite substance (A) et qui est connectée à une pompe (6) et à un détecteur (8) de substance (A). Une fibre optique (20) est installée aux environs de la conduite de collecte (4). Les propriétés de transmission de cette fibre optique sont modifiées par la substance (A). Ladite fibre optique est optiquement connectée à un système d'émission et de réception optique (22, 24, 26), qui permet de mesurer la durée de parcours de la lumière rétrodiffusée (s).
PCT/EP2002/003492 2001-04-03 2002-03-28 Systeme et procede pour identifier et localiser une substance qui s'echappe dans l'environnement WO2002082036A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10116496.3 2001-04-03
DE2001116496 DE10116496A1 (de) 2001-04-03 2001-04-03 Einrichtung und Verfahren zur Erkennung und Ortung eines in die Umgebung austretenden Stoffes

Publications (1)

Publication Number Publication Date
WO2002082036A1 true WO2002082036A1 (fr) 2002-10-17

Family

ID=7680163

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/003492 WO2002082036A1 (fr) 2001-04-03 2002-03-28 Systeme et procede pour identifier et localiser une substance qui s'echappe dans l'environnement

Country Status (3)

Country Link
AR (1) AR033210A1 (fr)
DE (1) DE10116496A1 (fr)
WO (1) WO2002082036A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007988A1 (de) * 2005-02-22 2006-08-24 Framatome Anp Gmbh Sammelleitung zur Leckageüberwachung und Leckageortung
FR2906887A1 (fr) * 2006-10-10 2008-04-11 Genesis France Dispositif de transport d'une substance muni d'un detecteur optique de fuite

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006053202A1 (de) 2006-11-09 2008-05-15 Areva Np Gmbh Leitungsanordnung zum Transport einer Flüssigkeit, insbesondere Erdöl
DE102008044317B4 (de) * 2008-12-03 2011-02-10 Universität Potsdam Vorrichtung und Verfahren zur Konzentrationsbestimmung von Sauerstoff

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04168335A (ja) * 1990-10-31 1992-06-16 Fujikura Ltd 漏液監視装置
DE19617359A1 (de) * 1996-04-30 1997-11-06 Siemens Ag Vorrichtung zur Detektion von Lecks in Einrichtungen, die organische Substanzen führen

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Publication number Priority date Publication date Assignee Title
DE2431907C3 (de) * 1974-07-03 1978-03-09 Wolfgang Dipl.-Phys. Dr.- Ing. 7500 Karlsruhe Issel Verfahren und Vorrichtung zur Bestimmung von Konzentrationsprofilen flüssiger oder gasförmiger Stoffe längs einer Strecke
JPS5920830A (ja) * 1982-07-27 1984-02-02 Sumitomo Electric Ind Ltd 油性液体漏洩検知方法
DE19532967A1 (de) * 1995-09-07 1997-03-13 Tzn Forschung & Entwicklung Verfahren und Anordnung zur Detektion von Leckagen an Rohrleitungen und Tanks und ihrer örtlichen Bestimmung
DE19535399A1 (de) * 1995-09-23 1997-03-27 Intec Ind Electronic Gmbh & Co Verfahren zur Erfassung von Lecks in einem ein Fluid enthaltenden bzw. führenden Hohlkörpers sowie Vorrichtung zur Durchführung dieses Verfahrens
DE29623263U1 (de) * 1996-08-06 1998-06-04 Forschungszentrum Karlsruhe GmbH, 76133 Karlsruhe Vorrichtung zum ortsaufgelösten Substanznachweis

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04168335A (ja) * 1990-10-31 1992-06-16 Fujikura Ltd 漏液監視装置
DE19617359A1 (de) * 1996-04-30 1997-11-06 Siemens Ag Vorrichtung zur Detektion von Lecks in Einrichtungen, die organische Substanzen führen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 468 (P - 1429) 29 September 1992 (1992-09-29) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007988A1 (de) * 2005-02-22 2006-08-24 Framatome Anp Gmbh Sammelleitung zur Leckageüberwachung und Leckageortung
US7802465B2 (en) 2005-02-22 2010-09-28 Areva Np Gmbh Collecting conduit, apparatus and method for leakage monitoring and leakage location
FR2906887A1 (fr) * 2006-10-10 2008-04-11 Genesis France Dispositif de transport d'une substance muni d'un detecteur optique de fuite
WO2008043915A3 (fr) * 2006-10-10 2008-06-19 Genesis France Dispositif de transport d'une substance muni d'un detecteur optique de fuite
US8418529B2 (en) 2006-10-10 2013-04-16 Genesis France Device for conveying a substance provided with an optical leak detector
NO340505B1 (no) * 2006-10-10 2017-05-02 Genesis France Anordning for å lede et stoff utstyrt med en optisk lekkasjedetektor

Also Published As

Publication number Publication date
AR033210A1 (es) 2003-12-10
DE10116496A1 (de) 2002-10-17

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