FR2616535A1 - Device for detecting sparking and light flashes - Google Patents

Device for detecting sparking and light flashes Download PDF

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Publication number
FR2616535A1
FR2616535A1 FR8708336A FR8708336A FR2616535A1 FR 2616535 A1 FR2616535 A1 FR 2616535A1 FR 8708336 A FR8708336 A FR 8708336A FR 8708336 A FR8708336 A FR 8708336A FR 2616535 A1 FR2616535 A1 FR 2616535A1
Authority
FR
France
Prior art keywords
fiber
light
light flashes
sections
detection device
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.)
Pending
Application number
FR8708336A
Other languages
French (fr)
Inventor
Bernard Dumas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEFTIM SA
Original Assignee
SEFTIM SA
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 SEFTIM SA filed Critical SEFTIM SA
Priority to FR8708336A priority Critical patent/FR2616535A1/en
Publication of FR2616535A1 publication Critical patent/FR2616535A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0422—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using light concentrators, collectors or condensers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/58—Photometry, e.g. photographic exposure meter using luminescence generated by light

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

The present invention relates to a device making it possible to detect at a distance the appearance of sparks or light flashes whose duration may be very short. It consists of an optical fibre 1 sensitive to a transverse light flux, which conveys the light picked up onto a light detector 4, possibly via a standard fibre 2.

Description

La detection des ctincelaes ou des flashes lumineux nécessite la mise en oeuvre de moyens volumineux, notamment lorsque le phénomène à détecter est peu énergétique, et que sa duree est brève. De ce fait, ces moyens ne permettent pas de procéder à des détections dans des structures dont l'accès est réduit ou dont le volume est faible. The detection of ctincelaes or light flashes requires the use of bulky means, in particular when the phenomenon to be detected is not very energetic, and its duration is short. Therefore, these means do not allow to carry out detections in structures whose access is reduced or whose volume is low.

Le dispositif objet de la présente invention permet de s'affranchir de ces problèmes, tout en présentant une grande sensibilité et un large domaine de détection. Il trouve notamment des applications pour vérifier l'absence d'étincelages dans des structures pouvant enfermer des matières inflammables (exemple : réservoirs d'aéronefs). The device object of the present invention overcomes these problems, while having a high sensitivity and a wide range of detection. In particular, it finds applications to verify the absence of sparks in structures that can contain flammable materials (example: aircraft tanks).

Il est constitué comme indiqué sur la figure 1 :
- d'un tronçon de fibre fluorescente (1),
- d'un tronçon de fibre optique standard (2) dont une extrémité est raccordée, à l'aide d'un adaptateur (3), à une extrémité de la fibre (1),
--d'un convertisseur de photons (4) en signal exploitable.It is constituted as shown in Figure 1:
- a section of fluorescent fiber (1),
- a section of standard optical fiber (2), one end of which is connected, using an adapter (3), to one end of the fiber (1),
- a photon converter (4) into a usable signal.

La fibre fluorescente (1) a la propriété, lorsqu'elle est soumise à un flux lumineux transversal, de restituer un flux lumineux longitudinal sur ses extrémités. The fluorescent fiber (1) has the property, when it is subjected to a transverse luminous flux, to restore a longitudinal luminous flux at its ends.

En présence d'un flash lunineux, le flux lumineux longitudinal issu de la fibre (1) est acheminé par une fibre optique standard à un détecteur de lumière (4) qui peut être constitué par exemple d'un appareil photographique, d'une caméra, d'une photodiode, d'un photomultiplicateur, d'un intensificateur d'image. In the presence of a lunar flash, the longitudinal light flux coming from the fiber (1) is routed by a standard optical fiber to a light detector (4) which can consist for example of a photographic camera, a camera , a photodiode, a photomultiplier, an image intensifier.

L'adantateur (3) entre le tronçon de fibre fluorescente (1) et la fibre standard (2) réalise la connexion entre ces deux fibres. Il peut être ainsi constitué d'un sigle collage entre les deux extrémités de fibre, ou encore d'un manchon permettant de maintenir en regard les deux extrémités de fibre, ou encore d'un connecteur optique. The adantator (3) between the fluorescent fiber section (1) and the standard fiber (2) makes the connection between these two fibers. It can thus be made up of an acronym bonding between the two fiber ends, or of a sleeve allowing the two fiber ends to be kept opposite, or of an optical connector.

Sur la figure 1 est représenté un dispositif de détection simple. In Figure 1 is shown a simple detection device.

Sur la figure 2 est schématisé un dispositif de détection plus complexe. In Figure 2 is shown schematically a more complex detection device.

Il est constitué
- de plusieurs tronçons de fibre fluorescente (1), (1'), (1"),
- d'un adaptateur (3) raccordant les extrémités des tronçons de fibre fluorescente (1), (1'), (1") à un toron de fibres optiques standards (2),
- d'un convertisseur de photons (4).It consists
- several sections of fluorescent fiber (1), (1 '), (1 "),
- an adapter (3) connecting the ends of the fluorescent fiber sections (1), (1 '), (1 ") to a strand of standard optical fibers (2),
- a photon converter (4).

Le toron de fibres (2) ?eut être constitué de plusieurs fibres ordonnées ou non. The fiber strand (2) could be made up of several fibers, ordered or not.

l'adaptateur (O) pourra .-trc constitué conte prccédenne.nt par un collage, par IU1 ou plusieurs manchons par un com1ecteur multivoies, ou par un assen  the adapter (O) can. -trc made up tale prccédenne.nt by a collage, by IU1 or several sleeves by a multichannel com1ector, or by a

Claims (3)

REME'DI CATIONSREMEDIATIONS CATIONS 1. Dispositif de détection d'étincelages ou de flashes lumineux constitué par un ou plusieurs tronçons de fibre fluorescente (1) qui, lorsqu'elle est soumise à un éclairement transversal, restitue à ses extrémités un flux lumineux longitudinal. 1. Device for detecting sparks or light flashes consisting of one or more sections of fluorescent fiber (1) which, when subjected to transverse illumination, restores a longitudinal luminous flux at its ends. 2. Dispositif de détection selon la revendication 1, raccordé à un ou plusieurs tronçons de fibre optique standard (2) destinée à déporter le flux lumineux longitudinal délivré par la fibre (1). 2. Detection device according to claim 1, connected to one or more sections of standard optical fiber (2) intended to offset the longitudinal light flux delivered by the fiber (1). 3. Dispositif de détection selon la revendication 1 ou selon la revendication 2, couplé à un détecteur de lumière (4).  3. Detection device according to claim 1 or according to claim 2, coupled to a light detector (4).
FR8708336A 1987-06-15 1987-06-15 Device for detecting sparking and light flashes Pending FR2616535A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8708336A FR2616535A1 (en) 1987-06-15 1987-06-15 Device for detecting sparking and light flashes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8708336A FR2616535A1 (en) 1987-06-15 1987-06-15 Device for detecting sparking and light flashes

Publications (1)

Publication Number Publication Date
FR2616535A1 true FR2616535A1 (en) 1988-12-16

Family

ID=9352065

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8708336A Pending FR2616535A1 (en) 1987-06-15 1987-06-15 Device for detecting sparking and light flashes

Country Status (1)

Country Link
FR (1) FR2616535A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403826A (en) * 1981-03-23 1983-09-13 Bell Telephone Laboratories, Incorporated Ultraviolet radiation detector
US4467208A (en) * 1981-05-16 1984-08-21 Carl-Zeiss-Stiftung, Heidenheim/Brenz, D/B/A Carl Zeiss, Oberkochen Radiation sensor containing fluorescible material
JPS6144331A (en) * 1984-08-08 1986-03-04 Hitachi Cable Ltd Ultraviolet-ray detecting method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403826A (en) * 1981-03-23 1983-09-13 Bell Telephone Laboratories, Incorporated Ultraviolet radiation detector
US4467208A (en) * 1981-05-16 1984-08-21 Carl-Zeiss-Stiftung, Heidenheim/Brenz, D/B/A Carl Zeiss, Oberkochen Radiation sensor containing fluorescible material
JPS6144331A (en) * 1984-08-08 1986-03-04 Hitachi Cable Ltd Ultraviolet-ray detecting method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 202 (P-477)(2258) 15 Juillet 1986 & JP-A-61 044 331 ( HITACHI CABLE ) 4 Mars 1986 *

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ER Errata listed in the french official journal (bopi)

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