DE2255788A1 - PROTECTION OF OBJECTS (FACILITIES AND TERRITORY) AGAINST UNAUTHORIZED ENTRY USING LASER METHODS - Google Patents

PROTECTION OF OBJECTS (FACILITIES AND TERRITORY) AGAINST UNAUTHORIZED ENTRY USING LASER METHODS

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Publication number
DE2255788A1
DE2255788A1 DE19722255788 DE2255788A DE2255788A1 DE 2255788 A1 DE2255788 A1 DE 2255788A1 DE 19722255788 DE19722255788 DE 19722255788 DE 2255788 A DE2255788 A DE 2255788A DE 2255788 A1 DE2255788 A1 DE 2255788A1
Authority
DE
Germany
Prior art keywords
laser
laser beam
protection
objects
detectors
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
DE19722255788
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German (de)
Inventor
Peter Hans
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19722255788 priority Critical patent/DE2255788A1/en
Publication of DE2255788A1 publication Critical patent/DE2255788A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G08B13/184—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 using radiation reflectors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Lasers (AREA)

Description

Schutz von Objekten (Anlagen und Gelände) gegen unbefugtes I :indringen mittels Laser-Verfahren II.Technische Beschreibung Um das zu schützende Objekt wird aus einer Laser-Quelle (i), mit der Wellenlänge im sichtbaren Bereich (0,40 ... 0,80 Fm), in einer oder mehreren übereinanderliegenden,vorbestimmten Ebenen (Abb.IV.1,2 und 3) zur Erzielung einer Schutzwand ein Laser-Strahl mittels Spiegel (3,4) abgelenkt.In beliebigen Abständen von der Laser-Quelle (1) können im Strahlengang des Lasers (2),ohne dessen Unterbrechung und Ablenkung,die Detektoren (5),ebenso am Ende zur Begrenzung des Strahles,ange bracht werden.Bei Unterbrechung des Strahles an beliebiger Stelle durch einen Fremdkörper,wird mit dem der Unterbrechungsstelle in Strahlrichtung folgenden Detektor kein Signal empfangen.Zur Montage,Justierung und regelmäßigen Überprüfung der Anordnung wird von der Laser-Quelle (1> ein Laser-Dauer-Strahl dessen Wellenlänge im sichtbaren Bereich liegtsausgesendet.Protection of objects (facilities and premises) against unauthorized intrusion by means of laser process II. Technical description To the object to be protected is from a laser source (i), with the wavelength in the visible range (0.40 ... 0.80 m), in one or more predetermined levels one above the other (Fig.IV.1,2 and 3) a laser beam is deflected by means of a mirror (3, 4) in order to achieve a protective wall Any distance from the laser source (1) can be in the beam path of the laser (2), without its interruption and distraction, the detectors (5), also at the end of the Limitation of the beam, if the beam is interrupted at any Point caused by a foreign body, becomes with the point of interruption in the direction of the beam The following detector does not receive a signal. For assembly, adjustment and regular The arrangement is checked by the laser source (1> a continuous laser beam whose wavelength is in the visible range.

Während des normalen Betriebszustandes wird der aus der selben Laser-Quelle (i) ausgehende Laser-Strahl (2) gleicher Wellenlänge so gepulst,daß dieser vom menschlichen Auge nicht mehr wahrgenommen werden kann.Dadurch wird erreichtldaß die Anordnung des Strählenganges optisch nicht ausSindig gemacht werden kann.Ein unberechtigtes Eindringen wird mittels der Detektoren (5) gemeldet.Die periodische Pulsierung des Laser-Strahles (2) erfolgt in einem festgelegten,sich wiederholenden Code,ieser besteht ausschließlich aus "O" oder i" Informationen.Der Code kann vom Betreiber der Anlage zur Erhöhung der Sicherheit des Verfahrens selbst gewählt bzw.geandert werden. During the normal operating state, the is from the same laser source (i) outgoing laser beam (2) of the same wavelength pulsed so that it is from the human Eye can no longer be perceived. This means that the arrangement is achieved the walk of the strafe cannot be made out of sight, an unjustified one Penetration is reported by means of the detectors (5). The periodic pulsation of the Laser beam (2) takes place in a fixed, repeating code, this one consists exclusively of "O" or i "information. The code can be used by the operator of the system itself selected or changed to increase the security of the process will.

Um störende Umwelteinflüsse,wie z.B.starke Helligkeit der Umgebung,möglichst auszuschalten,können die Detektoren (5) zur Aufnahme des Laser-Signales synchron mit der Impuisfolge der Sendequelle zum Empfang des Codes freigegeben werden.Vor Beginn der periodischen Impulsfolge wird ein Bereitstellungsimpuls für die Detektoren (5) ausgesendet.Prufen die Detektoren(S) während der nun folgenden Impulsfolge den Code vollständig Schutz von Objekten (Anlagen und Gelände) gegen unbefugtes Eindringen mittels Laser-Verfahren auf,geben sie eine Meldung ab.Fehlt in der Folge ein Impuls durch Unterbrechung des Strahlenganges bzw.ist die Laser-Anordnung ausgefallen (Laser-Quelle,Spiegel oder Detektor), geben die Detektoren (5) das Signal 0" ab,d.h.,es liegt eine Alarmmeldung bzw.ein Ausfall der Anlage vor.Im betriebsbereiten Zustand wird von den Detektoren ständig der Pegel "t" abgegeben.In einer zentralen Überwachungsstelle werden diese wo" bzw. t1" Impulse ausgewertet. To avoid disruptive environmental influences, such as strong brightness in the environment, if possible off, the detectors (5) can synchronously record the laser signal released with the pulse sequence of the transmission source to receive the code The beginning of the periodic pulse train is a readiness pulse for the detectors (5) The detectors (S) check during the following pulse sequence Code complete Protection of objects (facilities and grounds) against report unauthorized intrusion using a laser process. Missing This is followed by a pulse due to the interruption of the beam path or the laser arrangement failed (laser source, mirror or detector), the detectors (5) emit the signal 0 ", i.e. there is an alarm message or a failure of the system State, the level "t" is continuously output by the detectors. In a central Monitoring point, these where "or t1" pulses are evaluated.

Die Detektoren (5) umhüllen den durch sie hindurchgehenden Laser-Strahl (2).Auf der Innenseite (dem Laser-Strahl (2) zugewandt)sind sie verspiegelt (),das in diesem Kanal entstehende Streulicht trifft auf einen nicht im Strahlengang befindlichen'lichtempfindlichen Detektor (7) auf.Dieser ist mit einer elektronischen Auswerteschaltung verbunden.1)urch diese Art der Auskopplung wird der Laser-Strahl nicht beeinflußt.The detectors (5) envelop the laser beam passing through them (2). On the inside (facing the laser beam (2)) they are mirrored (), the Scattered light produced in this channel strikes a light-sensitive light that is not located in the beam path Detector (7), which is connected to an electronic evaluation circuit. 1) through this type of coupling does not affect the laser beam.

Durch eine geeignete Länge des Detektorrohres wird gewährleistet,daß der im Inneren der Anordnung befestigte,lichtempfindliche Detektor (7) durch Witterungs- und Umwelteinflüsse (llegen,Schnee,Eis,Staub usw.) nicht beeinfluSt wird.Die Auskopplung der Signale aus dem Laser-Strahl kann auch mit der Anordnung (8) eines teildurchlässigen Spiegels erfolgen.Der lichtempfindliche Detektor (7) befindet sich dann im Strahlengang der ausgekoppelten Teilstrahlung.A suitable length of the detector tube ensures that the light-sensitive detector (7) fastened inside the arrangement by and environmental influences (laying, snow, ice, dust, etc.) are not influenced the signals from the laser beam can also be partially transparent with the arrangement (8) The light-sensitive detector (7) is then located in the beam path the extracted partial radiation.

Claims (1)

Schutz von Objekte (Anlagen und Gelände>Protection of objects (facilities and grounds> gegen unbefugtes Eindringen mittels Laser-Verfahren III. Patent-Ansprueh Schutz von Objekten (Anlagen und Gelände) gegen unbefugtes Eindringen mittels Laser-Verfahren.against unauthorized intrusion using the laser process III. Patent claim Protection of objects (systems and premises) against unauthorized intrusion by means of laser processes. Das Verfahren ist dadurch gekennzeichnet, daß nit einer Laser-Quelle (1) i.) durch geeignete Anordnung von Spiegeln eine Schutzt1cnd vor dem zu schützenden Objekt errichtet wird 2.) die Montage,Ein-Justierung und Überprufung der Anord nung mit einem von der Laser-Quelle (i) ausgehenden Dauer-Laser-Strahl (2),dessen Wellenlänge im sichtba ren Bereich liegt 7 erfolgt 3.) während des regulären Betriebes der Schutzeinrichtung der Laser-Strahl (2) mit gleicher Wellenlänge wie unter Pos.2,derart gepulst wird,daß der von der Leser-Quelle (1) ausgehende Strahl vom menschlichen Auge nicht wahrgenommen werden kann 4.) die periodische Pulsung des Laser-Strahles (2) in einem vom Betreiber der Anlage aus Sicherheitsgründen selbst fest zu legenden Code erfolgt 5.) der ausgehende Laser-Strahl in einzelnen Detektoren (5), die im Strahlengang angeordnet sind,verglichen wird,um festzustellen, ob 5.1) der Laser-Strahl unterbrochen wurde 5.2) die Anlage noch einwandfrei arbeitet 6.) Die Detektoren können an jeder beliebigen Stelle im Strahlengang der Schutzwand angebracht werden 7 ) Verfahren zur Auskopplung der Alarmmeldung bzw.des Codes mittels der Detektoren (5) aus dem Laser-Strahl (2) The method is characterized in that with a laser source (1) i.) A protection zone in front of the one to be protected by a suitable arrangement of mirrors The object is being erected 2.) The assembly, adjustment and checking of the arrangement with a continuous laser beam (2) emanating from the laser source (i), its wavelength 7 is in the visible area. 3.) During regular operation of the protective device the laser beam (2) with the same wavelength as in item 2 is pulsed in such a way that the beam emanating from the reader source (1) is not perceived by the human eye 4.) the periodic pulsing of the laser beam (2) in one by the operator the system itself for security reasons to set the code 5.) the outgoing Laser beam in individual detectors (5), which are arranged in the beam path, compared to determine whether 5.1) the laser beam has been interrupted 5.2) the system is still working properly 6.) The detectors can be placed anywhere in the Beam path of the protective wall to be attached 7) Procedure for decoupling the Alarm message or the code by means of the detectors (5) from the laser beam (2)
DE19722255788 1972-11-15 1972-11-15 PROTECTION OF OBJECTS (FACILITIES AND TERRITORY) AGAINST UNAUTHORIZED ENTRY USING LASER METHODS Pending DE2255788A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19722255788 DE2255788A1 (en) 1972-11-15 1972-11-15 PROTECTION OF OBJECTS (FACILITIES AND TERRITORY) AGAINST UNAUTHORIZED ENTRY USING LASER METHODS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722255788 DE2255788A1 (en) 1972-11-15 1972-11-15 PROTECTION OF OBJECTS (FACILITIES AND TERRITORY) AGAINST UNAUTHORIZED ENTRY USING LASER METHODS

Publications (1)

Publication Number Publication Date
DE2255788A1 true DE2255788A1 (en) 1974-05-16

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Application Number Title Priority Date Filing Date
DE19722255788 Pending DE2255788A1 (en) 1972-11-15 1972-11-15 PROTECTION OF OBJECTS (FACILITIES AND TERRITORY) AGAINST UNAUTHORIZED ENTRY USING LASER METHODS

Country Status (1)

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DE (1) DE2255788A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001200A1 (en) * 1979-10-16 1981-04-30 Krohne Messtechnik Kg Light grid with single light source
EP0032117A2 (en) * 1980-01-07 1981-07-15 Erwin Sick GmbH Optik-Elektronik Monitoring apparatus for monitoring for holes or surface defects in webs
EP0118698A2 (en) * 1983-02-08 1984-09-19 Horst Klostermann Protection grid
DE3423299A1 (en) * 1984-06-23 1986-01-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Method for monitoring room areas, and light barrier
DE4130619A1 (en) * 1991-09-14 1993-03-25 Deutsche Aerospace OBJECT PROTECTION
DE10151327A1 (en) * 2001-10-17 2003-04-30 Sick Ag Optoelectronic device, such as a light barrier, has a flexible optical fiber coupling unit that means the transmission and receiving units can be flexibly aligned
FR2891937A1 (en) * 2005-10-10 2007-04-13 Piscines Desjoyaux Sa Sa Basin`s perimeter detecting device for swimming pool, has laser emitter and receiver assembly positioned with respect to respective support posts along top and bottom planes shifted in height with respect to bottom and top planes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001200A1 (en) * 1979-10-16 1981-04-30 Krohne Messtechnik Kg Light grid with single light source
EP0032117A2 (en) * 1980-01-07 1981-07-15 Erwin Sick GmbH Optik-Elektronik Monitoring apparatus for monitoring for holes or surface defects in webs
EP0032117A3 (en) * 1980-01-07 1982-05-12 Erwin Sick Gmbh Optik-Elektronik Monitoring apparatus
EP0118698A2 (en) * 1983-02-08 1984-09-19 Horst Klostermann Protection grid
EP0118698A3 (en) * 1983-02-08 1985-03-13 Horst Klostermann Protection grid
DE3423299A1 (en) * 1984-06-23 1986-01-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Method for monitoring room areas, and light barrier
DE4130619A1 (en) * 1991-09-14 1993-03-25 Deutsche Aerospace OBJECT PROTECTION
DE10151327A1 (en) * 2001-10-17 2003-04-30 Sick Ag Optoelectronic device, such as a light barrier, has a flexible optical fiber coupling unit that means the transmission and receiving units can be flexibly aligned
FR2891937A1 (en) * 2005-10-10 2007-04-13 Piscines Desjoyaux Sa Sa Basin`s perimeter detecting device for swimming pool, has laser emitter and receiver assembly positioned with respect to respective support posts along top and bottom planes shifted in height with respect to bottom and top planes

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