EP2044583A1 - Justierung und nachführung einer lichtstrecke - Google Patents
Justierung und nachführung einer lichtstreckeInfo
- Publication number
- EP2044583A1 EP2044583A1 EP07787827A EP07787827A EP2044583A1 EP 2044583 A1 EP2044583 A1 EP 2044583A1 EP 07787827 A EP07787827 A EP 07787827A EP 07787827 A EP07787827 A EP 07787827A EP 2044583 A1 EP2044583 A1 EP 2044583A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- light beam
- receiver
- transmitter
- emitted
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 claims abstract description 37
- 239000000779 smoke Substances 0.000 claims abstract description 27
- 238000011156 evaluation Methods 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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
Definitions
- the invention relates to a method and a device for adjusting or tracking a bundled light beam of a linear smoke detector, comprising a light transmitter, a light receiver and an evaluation unit.
- Linear smoke detectors also referred to as line extinction detectors smoke detectors
- the light emitter and the light receiver face each other and no reflector is required. These were used for a long time only when the rooms are so short that the minimum length of the light beam of about 10 m would not otherwise be reached, or if the opposite side of the transmitter is not stable or no receiver can be installed there. But since the design with the reflector is cheaper and much easier to install, set the linear smoke detector with reflector, such as a mirror, more and more.
- the optics When installing, commissioning, adjusting and tracking a linear smoke detector, the optics must be precisely aligned so that the greatest possible intensity of the light emitted by the light emitter is received by the light receiver.
- This alignment of the optics on the reflector or on the light receiver is the most difficult operation of installation / commissioning and also very complex, because it requires the cooperation of two people.
- One person operates the detector and the other person must position the reflector or the light receiver in such a way that the output signal of the light receiver reaches its maximum.
- the reflector or the light receiver mounted and then the detector or light emitter are aligned on this, but this does not change the complexity and effort of the installation.
- Detector is clamped and used to align it with the already mounted reflector.
- the object of the present invention is to provide a possible simple and efficient way to automatically adjust or track a linear smoke detector to propose.
- a core of the invention is to be seen in that for adjusting or tracking a bundled light beam of a linear smoke detector, at least comprising a light transmitter, a light receiver and an evaluation unit, from the evaluation unit, the light intensity of the light receiver received, bundled light beam received at the light receiver is evaluated.
- the deflection unit can represent either a unit of the light emitter or a separate unit, which is readjusted to the light emitter. It may for example consist of an optical lens system and / or a reflector, such as a mirror, a prism mirror, etc.
- a point light source a laser, at least one LED diode, a laser diode, or the like can be used.
- the light beam emitted by the light emitter is deflected by the deflection unit being displaced relative to the light emitter.
- the light beam is thus deflected by the change in the solid angle.
- the deflection of the collimated light beam can also be achieved by displacing or rotating the light transmitter relative to the optical axis. The rotation or the displacement can take place in any direction in space.
- the light transmitter itself is used as a deflection unit. In this
- the light transmitter is displaceable or rotatable and no further device is required for deflecting the light beam.
- electromechanical transducers may be used for the displacement or rotation, for example.
- at least one electromechanical transducer is used.
- These may be magnetic, piezoelectric and / or similar converters.
- the mirror or reflector used for the deflection of the light beam may be formed by micro-optical components, such as micro-diaphragms, micromirrors, etc., whose angles of attack are adjustable.
- the light transmitter is a light source constructed from light points having.
- Such a deflection unit functions such that only certain luminous points of the light source illuminate and thus a radial displacement relative to the optical axis of the light beam can be achieved.
- the light receiver can be mounted either opposite the light emitter or near the light emitter.
- a reflector for deflecting the light beam is needed. This is then installed in the room opposite the light emitter.
- the evaluation unit checks or evaluates whether the light beam received by the light receiver represents the emitted light or a scattering or undesired reflection of the emitted light. In order to distinguish between emitted light and scattered or undesired mirrored emitted light polarized light can be used.
- the reflector opposite the light emitter is doing a fixed, non-rotatable polarizing filter and the light emitter and / or the light receiver is preceded by a rotatable polarizing filter in the beam path of the light beam. Due to the fluctuations in the brightness value or the intensity of the light beam during the rotation of the polarization planes, it can be detected whether the received light beam is the desired useful light or unwanted, scattered or mirrored light. Basically, any type of mirror can be used as a reflector. In order to be able to carry out an adjustment or a tracking of the linear smoke detector, the deflection of the light beam emitted by the light transmitter can take place in accordance with a systematic search grid or search pattern which is defined beforehand.
- the light beam is deflected in different positions until the light receiver can detect the light beam in a pre-defined intensity.
- the light beam can be widened by the deflection unit until the light at the receiver is detected. Thereafter, the light beam is re-focused and deflected in the direction of the light receiver, so that the focused light beam is received by the light receiver with the previously defined intensity.
- the evaluation unit of the linear smoke detector can evaluate the intensity of the light beam received by the light receiver at a predefined time interval and possibly deflect the collimated light beam in such a way that, for example, a maximum intensity of the light beam is detected at the light receiver.
- Another advantage is that a misadjustment is readjusted automatically.
- DeJustierungen of the linear smoke detector arise, for example, in a heat expansion of the wall on which the linear smoke detector is mounted in, for example, an assembly hall. This makes it possible to install light paths in trades with steel structures.
- fluctuations and deviations can be determined and readjusted accordingly. Such fluctuations can additionally be used, for example, to detect dangers in the statics of a building.
- the method according to the invention it is possible to measure the roof load, the loads of the building construction and to inform a competent authority prematurely if there is a deviation from a certain value.
- Figure 1 shows two inventive forms of performance with electromechanical transducer for performing the
- Figure 3 shows a further inventive embodiment
- FIG. 4 shows a further embodiment according to the invention
- Light point light emitter for performing the
- FIG. 5 shows the change of the light beam by the device according to the invention with points of light
- FIG. 6 shows a further embodiment according to the invention with a mirror for carrying out the method
- FIG. 7 shows a first variant of a linear smoke detector according to the invention
- FIG. 8 shows a second variant of a linear smoke detector according to the invention.
- FIG. 1 shows two embodiments according to the invention using electromechanical transducers A, so-called actuators.
- the bundled light beam emitted by the light transmitter LS is deflected by the deflection unit, which consists of an optical lens system L, by moving the lens system L by electromechanical transducers.
- the deflection unit which consists of an optical lens system L
- a punctiform light source is preferably used.
- the deflection unit AE is moved with the optical lens system L and the actuators A relative to the light transmitter LS.
- the change in the radiated solid angle is achieved by tilting the inclination of the deflection unit AE by a certain angle.
- electromechanical transducers magnetic, piezoelectric or similar transducers can be used.
- the movement of the actuators is normal to the optical axis.
- the deflection unit AE is connected to the light transmitter LS.
- the deflection unit AE consists in this embodiment of electromechanical transducers A with which the light transmitter LS can be moved or rotated in the object plane.
- FIG. 2 shows a further embodiment according to the invention.
- the deflection unit AE consists of a mirror with micro-optical components whose
- Micromirror regions are used as micro-optical components in this embodiment.
- FIG. 3 shows a further embodiment according to the invention.
- the deflection unit AE consists of a diaphragm with micro-optical components.
- FIG. 4 and FIG. 5 show the change of the light beam through the device according to the invention with light point light transmitter LS.
- the light transmitter LS is a built-up of many light points light source. The emitted light beam is shifted by only those for the
- Such a light transmitter LS can for example be an LED light source that consists of a two dimensional ⁇ LED area.
- the exit angle, exit cone and shape of the light beam can through the
- FIG. 6 shows a further embodiment according to the invention with a mirror for carrying out the method.
- a mirror is used, which is tiltable in two orthogonal axes.
- Another embodiment could be that a combination of two mirrors is used, which can be tilted in each one of the orthogonal axes.
- the tilting of the mirror or the mirror electromechanical transducer A can be used.
- FIG. 7 shows a first variant of a linear smoke detector LRM according to the invention.
- the linear smoke detector LRM mounted in a structurally limited space, has a light transmitter LS, a deflection unit AE, a light receiver mounted opposite the light receiver LE and an evaluation unit AWE.
- a bundled light beam emitted by the light transmitter LS is deflected by a deflection unit AE in such a way that the light beam is received by the light receiver.
- the received intensity of the light beam is evaluated by the evaluation unit AWE.
- the light beam is deflected by the deflection unit until a predefined intensity of the light beam is received by the light receiver LE.
- a search grid for finding the light receiver LE can be used.
- the solid angle of the light beam are changed by the deflection unit AE until light is received by the light receiver.
- Another possibility for simplified adjustment is that the light beam is expanded until the light receiver LE receives light. Thereafter, the light beam is deflected by the deflection unit AE in the direction of the light receiver LE and bundled again. In predetermined time intervals, the intensity of the light received at the light receiver LE light beam can be evaluated and then the light beam can be tracked depending on this evaluation result, so that a certain intensity of the light beam is received at the light receiver LE.
- FIG. 8 shows a second variant of a linear one
- the light receiver LE is arranged near the light transmitter LS.
- light receiver LE, light transmitter LS, evaluation unit AWE and deflection unit AE are housed in a housing.
- the deflection unit AE can also be a separate unit.
- the light beam emitted by the light transmitter LS is reflected by a reflector, such as a mirror or the like to the light receiver LE.
- the evaluation result of the evaluation unit AWE can therefore contain information from the indicates whether the light received is the emitted light (useful light) or an unwanted reflection or scattering of the light. This is particularly important when the light transmitter LS and the light receiver LE are arranged close to each other and the
- Light beam is reflected by a reflector R on the opposite side of the room.
- the reflector R is preceded by a generally fixed, non-rotatable polarizing filter in the beam path of the light beam.
- the light transmitter LS and the light receiver have a polarizing filter whose filter plane is rotatable. Ideally, the filter level can be rotated by about 90 °.
- a variable, rotatable polarization filter is slowly rotated and the intensity values of the light received by the light receiver LE are evaluated by the evaluation unit AWE. If there are strong fluctuations, it is the useful light.
- the method according to the invention can also be used in linear smoke detectors, but also for light paths in light barriers, in apparatuses for measuring air turbidity or tectonic displacement, in optical transmission paths, etc.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07787827A EP2044583A1 (de) | 2006-07-26 | 2007-07-23 | Justierung und nachführung einer lichtstrecke |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06117859A EP1884903A1 (de) | 2006-07-26 | 2006-07-26 | Justierung und Nachführung einer Lichtstrecke |
EP07787827A EP2044583A1 (de) | 2006-07-26 | 2007-07-23 | Justierung und nachführung einer lichtstrecke |
PCT/EP2007/057584 WO2008012289A1 (de) | 2006-07-26 | 2007-07-23 | Justierung und nachführung einer lichtstrecke |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2044583A1 true EP2044583A1 (de) | 2009-04-08 |
Family
ID=37814653
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06117859A Withdrawn EP1884903A1 (de) | 2006-07-26 | 2006-07-26 | Justierung und Nachführung einer Lichtstrecke |
EP07787827A Withdrawn EP2044583A1 (de) | 2006-07-26 | 2007-07-23 | Justierung und nachführung einer lichtstrecke |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06117859A Withdrawn EP1884903A1 (de) | 2006-07-26 | 2006-07-26 | Justierung und Nachführung einer Lichtstrecke |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100044549A1 (de) |
EP (2) | EP1884903A1 (de) |
CN (1) | CN101517621A (de) |
WO (1) | WO2008012289A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2450132B (en) * | 2007-06-13 | 2012-06-20 | Hochiki Co | Position specifiying system |
CN103958004B (zh) * | 2013-07-16 | 2016-01-13 | 北京机械设备研究所 | 适用于高层和超高层建筑火灾扑救的消防车 |
FR3027438B1 (fr) * | 2014-10-16 | 2016-11-04 | Soc D'etude Et De Fabrication Ind | Detecteur lineaire de fumee encastre. |
CN105510230A (zh) * | 2016-01-15 | 2016-04-20 | 中国人民解放军理工大学 | 一种基于扫描方式的透射仪测量光路自动准直系统与方法 |
GB2551373B (en) | 2016-06-16 | 2019-11-06 | Ffe Ltd | Beam alignment |
EP3489921B1 (de) * | 2017-11-24 | 2020-01-01 | Siemens Schweiz AG | Verfahren und vorrichtung zum abgleich eines rauchmelders |
IT201800003638A1 (it) * | 2018-03-15 | 2019-09-15 | Tecnoalarm S R L | Rivelatore di fumo ad infrarossi e metodo per il suo allineamento |
CN110390793B (zh) * | 2019-06-19 | 2021-03-23 | 深圳市泰和安科技有限公司 | 一种探测器调焦方法及探测器 |
CN116482656B (zh) * | 2023-06-21 | 2023-09-22 | 华中科技大学 | 一种激光测距仪内光路控制切换装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4420746A (en) * | 1979-07-27 | 1983-12-13 | Malinowski William J | Self-calibrating smoke detector and method |
JPS61246654A (ja) * | 1985-04-24 | 1986-11-01 | Matsushita Electric Works Ltd | 光電式感知器の自動光軸調整装置 |
US5502434A (en) * | 1992-05-29 | 1996-03-26 | Hockiki Kabushiki Kaisha | Smoke sensor |
US5383118A (en) * | 1992-09-23 | 1995-01-17 | At&T Corp. | Device alignment methods |
US5315112A (en) * | 1992-12-10 | 1994-05-24 | Xerox Corporation | Real time laser spot tracking in both horizontal and vertical axes |
ATE208044T1 (de) * | 1997-06-30 | 2001-11-15 | Cedes Ag | Lichtschranke oder lichtvorhang mit ausrichthilfe |
US6525818B1 (en) * | 2000-02-08 | 2003-02-25 | Infineon Technologies Ag | Overlay alignment system using polarization schemes |
FR2815715B1 (fr) * | 2000-10-25 | 2003-01-24 | Sefi | Systeme de detection de fumee |
US7277173B1 (en) * | 2002-12-24 | 2007-10-02 | Agere Systems Inc. | Active optical alignment using MEMS mirrors |
US7274453B2 (en) * | 2004-10-14 | 2007-09-25 | The Procter & Gamble Company | Methods and apparatus for calibrating an electromagnetic measurement device |
US7265840B2 (en) * | 2005-06-16 | 2007-09-04 | Matsushita Electric Industrial Co., Ltd. | Coupling method for coupling high power optical beams into an optical waveguide |
US7652759B1 (en) * | 2006-02-23 | 2010-01-26 | Rockwell Automation Technologies, Inc. | Industrial device with adaptive optics |
-
2006
- 2006-07-26 EP EP06117859A patent/EP1884903A1/de not_active Withdrawn
-
2007
- 2007-07-23 EP EP07787827A patent/EP2044583A1/de not_active Withdrawn
- 2007-07-23 CN CNA200780035456XA patent/CN101517621A/zh active Pending
- 2007-07-23 WO PCT/EP2007/057584 patent/WO2008012289A1/de active Search and Examination
- 2007-07-23 US US12/375,126 patent/US20100044549A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2008012289A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20100044549A1 (en) | 2010-02-25 |
CN101517621A (zh) | 2009-08-26 |
WO2008012289A1 (de) | 2008-01-31 |
EP1884903A1 (de) | 2008-02-06 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20090127 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WONISCH, ERICH Inventor name: TAPPHORN, ARMIN Inventor name: SCHREYER, KARLHEINZ Inventor name: BIBO, CLEMENS |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20100615 |