EP3009999A1 - Eingebauter linearer rauchdetektor - Google Patents

Eingebauter linearer rauchdetektor Download PDF

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Publication number
EP3009999A1
EP3009999A1 EP15189419.3A EP15189419A EP3009999A1 EP 3009999 A1 EP3009999 A1 EP 3009999A1 EP 15189419 A EP15189419 A EP 15189419A EP 3009999 A1 EP3009999 A1 EP 3009999A1
Authority
EP
European Patent Office
Prior art keywords
light beam
collimator
transmitter
linear detector
shell
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.)
Ceased
Application number
EP15189419.3A
Other languages
English (en)
French (fr)
Inventor
Vincent LAVIELLE
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.)
D'etude Et De Fabrication Industrielle Ste
Original Assignee
D'etude Et De Fabrication Industrielle Ste
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 D'etude Et De Fabrication Industrielle Ste filed Critical D'etude Et De Fabrication Industrielle Ste
Publication of EP3009999A1 publication Critical patent/EP3009999A1/de
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the present invention relates to a linear smoke detector to be disposed in a room, in particular on a wall, for detecting smoke in the event of the beginning of a fire.
  • a linear detector is a beam emitter / receiver, generally infrared, which is reflected on a reflex reflector fixed on a remote wall. The collected beam back is detected and analyzed in order to deduce a presence or not of smoke.
  • the object of the present invention is a non-intrusive integration of the linear detector.
  • Another object of the invention is the production of a linear detector of great precision and high efficiency.
  • the invention also relates to a linear smoke detector difficult to detach when attached to a wall.
  • the passive and active components comprising at least one light beam emitter and a receiver, are inserted into the shell which is recessed into a wall.
  • active component is meant an electrical component requiring a power supply.
  • passive component is a non-active electrical component.
  • the shell also includes mechanical parts and optical elements.
  • a built-in linear detector has the advantage of being difficult to detach from the wall, in particular by an unauthorized person.
  • Such a linear detector also has the advantage of being very aesthetic, which allows to provide a discreet installation in places with a strong aesthetic character.
  • the linear detector is miniaturized by reducing its thickness.
  • the dimensions of the linear detector are now comparable or identical to standard dimensions of built-in electrical devices.
  • the reduction in thickness is achieved by reducing the focal length on transmission and reception within the linear detector.
  • the transmitter is associated with a transmitter and a low focal length collimator.
  • a Fresnel lens is associated with a photodetector (receiver).
  • the components can be advantageously chosen so that the focal lengths are almost identical.
  • the collimator may have a focal length less than or equal to 3.5 cm.
  • this focal length may be less than or equal to 1.6cm.
  • This linear detector may have a thickness of substantially 6 cm.
  • the collimator may have at its output a divergence of width at half height less than or equal to 8 degrees.
  • a collimator is used because it generally makes it possible to diffuse a beam of parallel rays with a reduced focal length.
  • the linear smoke detector may not be properly secured or may deviate slightly from the axis with time due to wall movements. In this case, having such a divergence of the beam coming out of the linear smoke detector can be considered as an advantage.
  • the bright spot of the light beam thus obtained on the reflex reflector arranged at a distance has a certain width, which ensures permanently at least one overlap between this spot and the reflex reflector.
  • the transmitter can be integrated in the collimator so that all the beams of the transmitter are collected by the collimator.
  • the collimator is a conical block having a cavity at the end of small section.
  • the transmitter is intended to be housed in this cavity and to diffuse through the inside of the collimator. As a result, all the energy of the transmitter is transmitted via the collimator.
  • the transmitter comprises a LED said LED.
  • This LED can be of the CMS type (surface-mounted component or SMD in English for "surface mounted device") disposed on the electronic board.
  • the reflex reflector is placed on a transparent or translucent support so as to integrate it as much as possible into its environment, typically making it as less visible as possible with respect to the wall on which it is placed.
  • a built-in linear detector and a discrete reflector the entire system can be easily installed without being overly intrusive.
  • the linear detector may comprise in the shell two conical insulators respectively around the emitter and receiver of the linear detector so as to independently isolate the transmit and receive beams in the shell.
  • Each insulator is a conical wall, the weakest section being on the transmitter and receiver side respectively.
  • These two insulators achieve a double isolation between the transmitter and the receiver. Indeed, even if all the beams of the transmitter are collected by the collimator, a tiny part can escape by parasitic reflections and can reach the receiver directly without being reflected by the reflector.
  • the dimensions of these two insulators are compatible with the compactness of the linear detector.
  • the shell comprises a filter centered on the wavelength of an infrared beam used in smoke detection.
  • This filter is for example a polycarbonate treated with a dye so as to block the visible light.
  • FIG. 1 On the figure 1 we see two walls 1 and 2, including two walls of a building, facing each other. These two walls 1 and 2 can constitute two walls of an entrance of a luxury building for which one wishes a maximum discretion. We want the walls to have a beautiful aesthetic appearance. To do this, it provides a least intrusive installation of a smoke detection system according to the invention.
  • This system comprises a linear detector 3 embedded in the wall 1 so that the upper cover of this sensor is flush with the wall 1 or overhangs this wall of negligible thickness, that is to say a thickness that can hardly be perceived at distance, typically less than 8mm.
  • a linear detector is a device clearly identified and whose function is the emission and reception of a beam of light. The intensity of the light beam received allows determine whether the atmosphere traversed by the light beam comprises smoke or not.
  • the linear detector 3 emits a light beam towards a reflex reflector 4 disposed on the wall 2 opposite.
  • the reflector 4 is a translucent blade placed on a support 5 made of transparent plastic or with a color identical to the color of the wall 2. figure 2 , we see the reflex reflector 4 inserted into the support 5, the latter being in the form of a box with a central opening 6 at the rear.
  • the support 5 is transparent and fixed to the wall by not very visible fixing means such for example translucent glue or screws of the same color as the wall.
  • the reflector 4 is designed and positioned to return any beam of light to the source thereof.
  • Such a reflex reflector can be carefully placed on a wall in a way that is almost non-intrusive, that is to say that its integration into the environment is not aggressive, it is not very visible.
  • the linear detector is partially or completely embedded in the wall so as to be inconspicuous.
  • the present invention is particularly remarkable in that it incorporates in a thin shell all the passive and active components necessary for the emission and reception of a light beam.
  • Said thickness can be defined as the height of the linear detector, typically the height of the shell, measured along the optical axis (path of the light beam). The fact of minimizing this thickness while maintaining a diameter in standard dimensions, allows easy installation of the linear detector, in particular flush with the wall.
  • the solution was to reduce the focal length of the optical components to the emission and reception of the light beam.
  • This solution is concretized advantageously with the combination of components as illustrated on the figure 3 .
  • This shell has openings on its base or on one side for the passage of power cables and signal transmission.
  • a transmitter 9 for emitting a light beam towards the catadiopter 4 and a receiver 10 for receiving the light beam reflected by the reflector 4.
  • the transmitter 9 is advantageously a light emitting diode (LED or LED in the English language for Light Emitting Diode) type CMS fixed for example directly on the electronic card 8.
  • the characteristics of this LED can be a wavelength centered at 940 nm , a direct supply current of less than or equal to 2 A, an angular divergence of the emitted flux of width at half height less than or equal to 160 degrees. It may be a diode emitting a diverging beam of light.
  • all the beam coming out of the transmitter 9 is picked up by a collimator 11.
  • the purpose of the collimator 11 is to try to make the constituent beams of said light beam parallel.
  • the collimator may have a particularly flat base and be placed above the transmitter so as to capture the maximum beams emitted by the transmitter.
  • This collimator can be directly in contact with the transmitter or via a suitable fastening means.
  • the collimator 11 comprises on its base a recess or box 12 of complementary shape to the shape of the emitter.
  • the function of the box is to receive with or without contact the transmitter when the collimator is placed on the transmitter 9.
  • the box 12 is thus completely cover the transmitter so that the beams leaving the transmitter are captured by the collimator 11.
  • the base of the collimator 11 It distinguishes the box 12 dug in the collimator and having for example a parallelepiped shape. Other forms may be used in particular to conform to the shape of the transmitter, but not only.
  • a reference collimator LLC05N (from Gaggione®), with a maximum diameter of 32.5 mm; a height of less than 16 mm.
  • the collimator may have as output a divergence of width at half height less than or equal to 8 degrees.
  • the collimator On the front face of the collimator, that is to say the exit face of the light beam 13, there is a convex peripheral zone 14 all around a central zone 15 bulging outwards.
  • the outer face thus has a profile adapted to collimate as much as possible the light beam 13.
  • a collimator having characteristics that do not allow a perfect collimation. Indeed, one may wish to have a slight divergence of the light beam 13 so that the spot of the latter on the opposite wall is large enough to cover at least a portion of the reflector at the time of installation and when both walls undergo a slight shift relative to each other over time.
  • microprocessor 20 for managing the transmitter, the receiver and other active components of the linear detector.
  • each insulator 18 and 19 of conical shape is flared towards the exit of the hull. Both insulators can be connected together to form a single component. They can be black in color and plastic. The height of each isolator may be determined to be equal to or slightly greater than the focal length of the collimator or Fresnel lens.
  • the light beam 13 (and 16) is an infrared signal that can pass through the filter 21 in both directions.
  • the shell 7 is illustrated on the Figures 5a and 5b in more detail. There are many notches and protuberances for fixing the shell in the wall and for fixing internal components in the shell.
  • the overall outer shape is identical to a standard shell type hull form for electrical equipment such as switch or socket.
  • the shell has an upper flange 22 intended to serve as a stop against the outer face of the wall.
  • On the figure 5b we see a sectional view of the shell 7 with the inscription of the dimensions such as the height of 6cm and the diameter of about 10cm. The diameter of the rim is about 11cm.
  • a mechanical part 23 plastic to insert into the shell This mechanical part is represented in a radial section on the figure 6b . It comprises the two insulators 18 and 19 and fastening means for a highly accurate arrangement within the shell 7.
  • the mechanical part 23 and shaped to receive the Fresnel lens and the collimator in the insulators. Shims are provided for the Fresnel lens to be at a predetermined distance from the receiver.
  • the filter 21 is intended to be fixed on the mechanical part 23 by means of clips.
  • the receiver is disposed on the same electronic card as the transmitter, but it can also be arranged on a different electronic card, not necessarily next to or on the same plane as the transmitter.
  • the linear detector according to the invention can work with any type of reflex reflector technically designed to send light back to the transmitter.
  • this reflector is still transparent or translucent so as to remain difficult to detect by malicious people.
  • an infrared beam is used, but other wavelengths may be considered.
  • the filter placed on the shell must be adapted to the wavelength used.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP15189419.3A 2014-10-16 2015-10-12 Eingebauter linearer rauchdetektor Ceased EP3009999A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1459909A FR3027438B1 (fr) 2014-10-16 2014-10-16 Detecteur lineaire de fumee encastre.

Publications (1)

Publication Number Publication Date
EP3009999A1 true EP3009999A1 (de) 2016-04-20

Family

ID=52021284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15189419.3A Ceased EP3009999A1 (de) 2014-10-16 2015-10-12 Eingebauter linearer rauchdetektor

Country Status (2)

Country Link
EP (1) EP3009999A1 (de)
FR (1) FR3027438B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108389357A (zh) * 2018-04-17 2018-08-10 吉林省威科拓科技有限公司 一种智能烟雾报警系统
EP4332937A1 (de) * 2022-08-31 2024-03-06 Carrier Corporation Maskierung zur beseitigung direkter sichtlinien zwischen lichtemitter und lichtempfänger in einem rauchdetektor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003487A1 (en) * 1981-03-25 1982-10-14 Telefon Ab L M Ericsson Optical fire detector
WO2004104959A2 (en) * 2003-05-23 2004-12-02 Apollo Fire Detectors Limited Smoke detector
EP1983495A1 (de) * 2007-04-20 2008-10-22 Fabrication d'Applications et de Réalisations Electroniques Rauchmelder mit Vorrichtung an einem Reflektor zum Selektieren eines Lichtstrahles
EP2093731A1 (de) * 2008-02-19 2009-08-26 Siemens Aktiengesellschaft Linearer optischer Rauchmelder mit mehreren Teilstrahlen
US20100044549A1 (en) * 2006-07-26 2010-02-25 Clemens Bibo Alignment and adjustment of a light path

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003487A1 (en) * 1981-03-25 1982-10-14 Telefon Ab L M Ericsson Optical fire detector
WO2004104959A2 (en) * 2003-05-23 2004-12-02 Apollo Fire Detectors Limited Smoke detector
US20100044549A1 (en) * 2006-07-26 2010-02-25 Clemens Bibo Alignment and adjustment of a light path
EP1983495A1 (de) * 2007-04-20 2008-10-22 Fabrication d'Applications et de Réalisations Electroniques Rauchmelder mit Vorrichtung an einem Reflektor zum Selektieren eines Lichtstrahles
EP2093731A1 (de) * 2008-02-19 2009-08-26 Siemens Aktiengesellschaft Linearer optischer Rauchmelder mit mehreren Teilstrahlen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108389357A (zh) * 2018-04-17 2018-08-10 吉林省威科拓科技有限公司 一种智能烟雾报警系统
EP4332937A1 (de) * 2022-08-31 2024-03-06 Carrier Corporation Maskierung zur beseitigung direkter sichtlinien zwischen lichtemitter und lichtempfänger in einem rauchdetektor

Also Published As

Publication number Publication date
FR3027438B1 (fr) 2016-11-04
FR3027438A1 (fr) 2016-04-22

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