Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
  • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
  • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B11/00—Measuring arrangements characterised by the use of optical techniques
  • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
  • G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/22—Electrical actuation
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49002—Electrical device making
  • Y10T29/49107—Fuse making

Definitions

• the present invention relates to a light emitting device for the detection of passage or smoke, a method of manufacturing such a device and a passage or smoke detection device comprising it. It applies, in particular, to the detection of fire and / or intrusion and / or the surveillance of premises or sites.
• Fire detection is done in different ways, at least one of which is optical.
• a light signal is emitted into the room, preferably infrared for the detection of smoke, the light radiation emitted after passing through part of the room atmosphere is detected and the presence of smoke is detected when the amount of light received is less than a limit value.
• the orientation tolerances of the light emitting components are important and the insertion of these detectors into housings adds additional dispersion. It is thus difficult to correctly position the light sensor opposite the light emitter or, in the case where a single housing comprises the emitter and the sensor, to position a retro-reflector in the emitted light beam. As a result, either the distance traveled is reduced or the installation takes a long time.
• the prevention of the risk of third party intrusion or fire in premises or sites is a strong constraint for the safety of the property and people present inside these sites and premises.
• the known detection systems use either cameras or light ray sensors emitted by light sources.
• the cameras and image processing required to detect the passage of an intruder are complex, expensive and unreliable because they are sensitive to the movements of shadows, such as trees set in motion by the wind or birds.
• the light rays to be used must be invisible to prevent an intruder from seeing them and thus bypass them, or in the case of fire detection be the least invasive possible.
• pointing an invisible ray on a target is very difficult, which increases the installation time of such systems.
• OBJECT OF THE INVENTION The present invention aims to remedy all or part of these disadvantages.
• the present invention aims at a light emitting device for the detection of passage in the emitted beam, which comprises:
• the light-emitting device is installed by switching on the visible laser radiation source.
• the aiming of the laser on a target for example a light sensor or a retro-reflector, is thus easy since the operator sees the visible laser radiation.
• the visible laser radiation source emits light of wavelength between 497 and 560 nm. These arrangements make the laser radiation particularly visible.
• the device that is the subject of the present invention comprises means for controlling a cyclic ignition of the visible laser source downstream of the switch.
• the visible laser beam is all the more visible since the eye of the operator sees the changes in brightness better than the constant lights.
• the power consumption of the device is reduced since, during installation, the visible laser radiation source is ignited only during part of the ignition cycle.
• the device of the present invention comprises a housing containing the two radiation sources and a switch, the switch to turn off the visible laser source being controlled by the switch of the housing configured to control the activation of the laser source visible when opening the housing and controlling the extinction of the visible laser radiation source when the housing is closed.
• the housing is opened and the radiation is tracked on the target by pointing means contained in the housing.
• the housing is closed, which has the effect of extinguishing the visible laser radiation source and protect the pointing means from any manipulation.
• the visible laser radiation source has a cylindrical or conical outer surface of revolution and a predetermined angular tolerance
• the alignment means comprises: an outer part having a cylindrical or conical inner bore of revolution, the axis of the bore being offset with respect to the reference axis by a first angle at least equal to half the predetermined angular tolerance and
• an intermediate piece having a cylindrical or conical outer surface of revolution corresponding to a portion of the internal bore of the outer piece and a cylindrical or conical internal bore of revolution corresponding to a portion of the external surface of the visible laser radiation source; , the axis of the outer surface and the axis of the internal bore of the intermediate piece having between them an angle equal to the first angle.
• the invisible radiation source has a cylindrical or conical outer surface of revolution and a predetermined angular tolerance
• the alignment means comprises:
• an intermediate piece having a cylindrical or conical outer surface of revolution corresponding to a portion of the internal bore of the outer piece and a cylindrical or conical internal bore of revolution corresponding to a part of the external surface of the invisible radiation source, the axis of the outer surface and the axis of the internal bore of the intermediate piece having between them an angle equal to the first angle.
• the support of the visible laser radiation source comprises at least one outer part comprising a cylindrical recess and an inner part whose outer surface corresponds to the recess of the outer part provided with a recess.
• a cylindrical circular base corresponding to the external surface of the visible laser radiation source, the axes of the outer and inner cylindrical surfaces of the inner part forming, between them, an angle greater than a degree of angle and less than ten degrees of angle.
• the present invention provides an alarm device comprising a light emitting device object of the present invention, a means for receiving light emitted by said light emitting device and a means for generating light. alarm configured to emit an alarm signal when the light receiving means receives a light intensity less than a predetermined limit value.
• the present invention aims a smoke detection device comprising a light emitting device object of the present invention, a means for receiving the light emitted by said light emitting device and a means for generating a signal representative of the smoke detection configured to emit a smoke detection signal when the light receiving means receives a light intensity less than a predetermined limit value.
• the present invention provides an intrusion detection device comprising a light emitting device object of the present invention, a means for receiving the light emitted by said light emitting device and a means of generating a signal indicative of an intrusion configured to transmit an intrusion detection signal when the light receiving means receives a light intensity less than a predetermined limit value.
• the present invention provides a method of manufacturing a light emitting device object of the present invention, which comprises:
• a step of parallel alignment of the optical axes of the laser radiation sources In embodiments, during the parallel alignment step, the following are performed:
• a step of rotation in an outer part comprising a cylindrical recess, of an inner part whose outer surface corresponds to the recess of the outer part provided with a cylindrical recess with a circular base corresponding to the external surface of the source; of visible laser radiation, the axes of the outer and inner cylindrical surfaces of the inner part forming, between them, an angle greater than a degree of angle and less than ten degrees of angle and
• the visible laser radiation source having a cylindrical or conical outer surface of revolution and a predetermined angular tolerance, during the parallel alignment step is carried out:
• the outer part having a cylindrical or conical internal bore of revolution, the axis of the bore being offset with respect to the reference axis by a first angle at least equal to half the predetermined angular tolerance and
• the intermediate piece having a cylindrical or conical external surface of revolution corresponding to a portion of the internal bore of the outer piece and a rotation of the source of visible laser radiation in the intermediate piece,
• the intermediate piece having a cylindrical or conical internal bore of revolution corresponding to a part of the external surface of the visible laser radiation source, the axis of the external surface and the axis of the internal bore of the intermediate piece having between them an angle equal to the first angle.
• the invisible radiation source having a cylindrical or conical outer surface of revolution and a predetermined angular tolerance, during the parallel alignment step, is carried out:
• the outer part having a cylindrical or conical internal bore of revolution, the axis of the bore being offset with respect to the reference axis by a first angle at least equal to half the predetermined angular tolerance and
• the intermediate piece having a cylindrical or conical outer surface of revolution corresponding to a portion of the internal bore of the outer piece
• the intermediate piece having a cylindrical or conical inner bore of revolution corresponding to a portion of the outer surface of the invisible radiation source, the axis of the outer surface and the axis of the internal bore of the intermediate piece having them an angle equal to the first angle.
• Another problem that certain embodiments of the present invention solve is that of the alignment of an axis of a mechanical part parallel to a predetermined axis, when said axis of the mechanical part has an angular tolerance.
• the mechanical part is a light source whose optical axis, which has an angular tolerance with respect to the mechanical axis, must be aligned parallel to an optical axis.
• an alignment device parallel to a reference axis of an axis of a part having a cylindrical outer surface or conical revolution and a predetermined angular tolerance which comprises:
• an intermediate piece having a cylindrical or conical external surface of revolution corresponding to a portion of the internal bore of the outer piece and a cylindrical or conical inner bore of revolution corresponding to a part of the outer surface of the piece whose axis must be aligned, the axis of the external surface and the axis of the internal bore of the intermediate piece having between them an angle equal to the first angle,
• the two surfaces "corresponding" means two surfaces identical to a close mechanical play that allows the rotation of one surface in another.
• the first angle is at least equal to the sum of one-half of the predetermined angular tolerance and the angular tolerance of mechanical positioning of the axis of the outer part.
• FIG. 1 represents, in four sectional views, elements of a particular embodiment of the light emitting device object of the present invention
• FIG. 2 represents an implementation diagram of an alarm device that is the subject of the present invention
• FIG. 3 represents, in the form of a logic diagram, the steps implemented in a particular embodiment of the method that is the subject of the present invention
• FIGS. 4 to 6 show, respectively, two pieces of optical axis alignment means and a source of visible laser radiation
• FIG. 1 shows a particular embodiment of a light emitting device 10 of the present invention, out of the box, from the front, at the top left, in section along the axis AA, at the bottom at left and in section along the BB axis, on the right and, for a case, on the bottom right.
• This device 10 comprises:
• a plane support 105 carries the invisible light source 1 10, the visible laser light source 1 15, a photoreceptor 120.
• Each of these photoelectronic components is surrounded by a cylinder 145 for protection against parasitic lights.
• the protective cylinders are formed of a black plastic mechanical part fixed on the plane support 105 by screws 125.
• the photoreceptor 120 is surmounted by a chromatic filter 150 configured to pass a narrow band of wavelengths around the emission wavelength of the invisible laser light source 1 10.
• the invisible light source 1 10 is, for example, an infrared diode emitting in the infrared wavelength domain.
• the visible laser light source 1 emits, preferably, a green light beam, color for which the human eye is particularly sensitive. It is recalled that the primary green is visible in a wavelength range of approximately 497-560 nm. The sensitivity of a dark-adapted human eye is greatest for a wavelength of about 507 nm, a bluish green, while a light-adapted eye is the most sensitive for a length of 60 minutes. wave of 550-555 nm is a yellowish green.
• the photoreceptor 120 is, for example, a phototransistor.
• the invisible light source 1 10 is an infrared laser diode.
• a switch 140 makes it possible to turn on the visible laser light source 1 15.
• a cyclic control means 135 is placed between the switch 140 and the invisible light source 1 15.
• the visible laser light source 1 15 cyclically emits a visible light beam.
• the cycle time is one second and the light emission duration is half a second.
• a switch 130 controlled by the closure of the housing switches the light emission between the visible laser light source 1 15, when the housing is open and the invisible light source 1 10, when the housing is closed.
• the device 10 comprises means for adjusting the orientation of the optical axis of the light source 1 15.
• the invisible light source 1 10 is a surface mounted component ("CMS"). Its orientation is therefore fixed relative to the plane support 105.
• the visible light source 1 15 is a low-cost component, in the form of a cylinder with a circular base.
• the means for parallel alignment of the optical axes of the radiation sources 1 10 and 1 15 comprises, in the embodiment shown in FIG. 1, forming a support for the visible radiation source 1 15:
• an outer part 155 comprising a cylindrical recess
• an inner part 160 whose outer surface corresponds to the recess of the outer part provided with a cylindrical recess with a circular base corresponding to the external surface of the visible laser radiation source, the axes of the outer and inner cylindrical surfaces of the an inner part preferably forming, between them, an angle greater than a degree of angle and less than ten degrees of angle; preferably less than five degrees of angle.
• the alignment means is described with reference to FIGS. 4 to 9.
• the optical axis of the visible laser radiation source 1 is oriented in any direction of a solid angle.
• Each device 10 is coupled to a reflector, for example a retro-reflector, positioned at one end of an optical path corresponding to the optical axis of the invisible light source 1 10.
• the reflected light is partially captured by the photoreceptor 120.
• output signal of the photoreceptor 120 is processed by an electronic circuit (not shown but preferably coincides with the plane support 105) which compares it to a predetermined limit value.
• the limit value is either fixed or adaptive, that is to say slowly variable depending on the output signal of the photoreceptor 120.
• the electronic circuit triggers a signal representative of the passage of an object, a person or an animal in the optical path from the light source 1 10 to the reflecting surface.
• a casing lid 165 in section, having a transparent window 170 for the wavelengths perceived by the photoreceptor 120.
• This housing 165 also comprises a support 175 configured to actuate the switch 130 when closing the housing on the plane support 105 so that the visible light source 1 15 can no longer emit light and the invisible light source 1 10 can emit light. Conversely, as soon as the housing 165 is open, the switch 130 is released and the visible light source 1 15 can emit light and the invisible light source 1 10 can no longer emit light.
• the two light sources can emit simultaneously, under the control of a program dedicated to this step.
• an alarm device 20 is installed comprising at least one light emitting device that is the subject of the present invention.
• two light-emitting devices 205 and 210 are used.
• the light emitting device 205 emits, first, a visible light beam 215, which is reflected on a retro-reflector 225.
• the positioning of the device 205 and / or the catadiopter 225 is facilitated by the fact that the light emitted by the source 1 15 is visible and in that this emission of light is intermittent.
• the housing of the device 205 is closed, which has the effect of extinguishing the source 1 15.
• the device 205 emits an invisible ray 220, which also reflects on the reflex reflector 225.
• the device 210 emits successively a visible light beam 230 and an invisible light beam 235 in the direction of a retro-reflector 240.
• the signal coming from the photoreceptors 120 of the devices 205 and 210 are transmitted 245.
• the alarm control unit 245 follows the instructions of a program to trigger actions following the detection of passage in the light beams 220 and 235.
• the central alarm 245 sends messages. calls and / or sounds an audible alarm by sounding a tone to a loudspeaker 250.
• the device 20 is incorporated in a smoke or fire detection device, which also includes a means for generating a signal representative of the smoke detection configured to emit a smoke detection signal when the light receiving means receives a light intensity lower than a predetermined limit value.
• the device 20 is incorporated in an intrusion detection device, which also includes means for generating a signal representative of an intrusion configured to transmit an intrusion detection signal when the light reception receives a light intensity less than a predetermined limit value.
• an intrusion detection device which also includes means for generating a signal representative of an intrusion configured to transmit an intrusion detection signal when the light reception receives a light intensity less than a predetermined limit value.
• the manufacture of a light emitting device which is the subject of the present invention comprises:
• the invisible radiation source 1 10 is turned on and it is verified that the direction of the optical axis of the invisible radiation source 1 10 is perpendicular to the plane support 105. Otherwise, the orientation is changed. of the plane support 105 until the optical axis of the invisible radiation source 1 10 corresponds to a predetermined optical axis. For example, the radiation reflected on the photoreceptor 120 is measured for a first retro-reflector, placed close to the plane support 105, then, once the orientation has been set, to a second, further, retro-reflector, and so on.
• the optical axis is normalized as perpendicular to the plane of the surface-mounted circuit ("CMS") and step 305 is unnecessary.
• step 310 the source of visible laser radiation 1 15 is turned on and the parallelism of the optical axes of the radiation sources 1 10 and 1 15 is adjusted by carrying out:
• a step of rotation in an outer part comprising a cylindrical recess, of an inner part whose outer surface corresponds to the recess of the outer part provided with a cylindrical recess with a circular base corresponding to the external surface of the source; of visible laser radiation, the axes of the outer and inner cylindrical surfaces of the inner part forming, between them, an angle greater than a degree of angle and less than ten degrees of angle and
• step 315 the position of the visible laser radiation source 1 15 is fixed, for example by welding or gluing.
• step 320 the light-emitting device 10 is implanted on the site to be monitored without putting the housing cover on the plane support 105.
• step 325 the laser radiation source is turned on. visible 1 15.
• the relative positioning of the device 10 and the reflex reflector is carried out, which must reflect its invisible radiation.
• the device 10 is held in place and the reflex reflector is positioned at the location indicated by the visible laser radiation, or the reflex reflector is first fixed and then the orientation of the device 10 is shifted or changed. modification of the orientation of the device 10 is achieved by the use of adjustment screws configured to allow adjustment of the angle causing the alignment of the visible laser radiation source 1.
• the housing of the device 10 is closed, positioning the cover.
• the closing of the housing of the device 10 causes the extinction of the visible laser radiation source 1 15.
• a step 345 the monitoring of the site is triggered. This monitoring is triggered by the alarm center 245.
• the invisible radiation source 1 10 is turned on.
• a step 355 the passage of an object, a animal, a person or obscuration by smoke in the ray emitted by the invisible laser radiation source by processing the signal from the photoreceptor 120.
• the Central alarm if a passage is detected, the Central alarm triggers actions depending on the program that makes it work.
• the outer part 155 of the parallel alignment means of the optical axes of the radiation sources 1 10 and 1 15 has an internal bore 156 which is cylindrical or conical of revolution.
• this bore 156 is a truncated cylinder of revolution.
• the axis of the bore 156 is offset from the reference axis by a first angle at least half of the predetermined angular tolerance of the visible laser light source 1.
• the first angle is at least equal to the sum of the half of the predetermined angular tolerance and the angular tolerance of mechanical positioning of the axis of the outer part 155 and the angular tolerance of the mechanical positioning of the axis. the source of radiation 1 10 invisible.
• the intermediate piece 160 of the alignment means has:
• a cylindrical or conical internal bore 161 of revolution (cylindrical in FIG. 5) corresponding to a part of the external surface 1 18 of the source 1 15 of visible laser radiation, the axis of the external surface 161 and the axis of the internal bore 162 of the intermediate piece 160 having, between them, an angle preferably equal to the first angle.
• the source 1 15 of visible laser radiation has a cylindrical or conical external surface 1 18 of revolution (cylindrical in FIG. predetermined angular tolerance between its mechanical axis 1 17 (the axis of revolution of the outer surface 1 18) and its optical axis 1 16, that is to say the axis along which the laser radiation propagates. Note that if the source 1 15 of visible laser radiation does not have a cylindrical or conical outer surface of revolution, the source 1 15 is secured to a part having these missing geometrical characteristics.
• alignment means presented with reference to FIGS. 4 to 9 are alternatively applied to the source 1 10 of invisible radiation or to each of the two radiation sources 1 10 and 1 15.
• the characteristics of the alignment means illustrated in FIGS. 4 to 9 make it possible to obtain the alignment of an axis of a mechanical part parallel to a predetermined axis, when said axis of the mechanical part presents angular tolerance.
• the mechanical part is a light source whose optical axis, which has an angular tolerance with respect to the mechanical axis, must be aligned parallel to a reference optical axis, that is, ie the optical axis of the invisible radiation source.
• an alignment device parallel to a reference axis of an axis of a part having a cylindrical or conical outer surface of revolution and a predetermined angular tolerance which comprises:
• an intermediate piece having a cylindrical or conical external surface of revolution corresponding to a portion of the internal bore of the outer piece and a cylindrical or conical inner bore of revolution corresponding to a part of the outer surface of the piece whose axis must be aligned, the axis of the external surface and the axis of the internal bore of the intermediate piece having between them an angle equal to the first angle, the part whose axis must be aligned sliding in rotation in the internal bore of the intermediate piece.
• the two surfaces "corresponding" means two surfaces identical to a close mechanical play that allows the rotation of one surface in another.
• the first angle is at least equal to the sum of one-half of the predetermined angular tolerance and the angular tolerance of mechanical positioning of the axis of the outer part.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Optics & Photonics (AREA)
• Semiconductor Lasers (AREA)
• Fire-Detection Mechanisms (AREA)
• Burglar Alarm Systems (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48083283

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Family Cites Families (9)

• 2012
  • 2012-12-28 FR FR1262905A patent/FR3000589B1/fr not_active Expired - Fee Related
• 2013
  • 2013-12-30 WO PCT/FR2013/053284 patent/WO2014102519A1/fr not_active Ceased
  • 2013-12-30 EP EP13827029.3A patent/EP2939221A1/de not_active Withdrawn
  • 2013-12-30 US US14/758,558 patent/US9599465B2/en active Active

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events