EP2276605A1 - Élément de protection contre les rayonnements, arrangement et procédé de protection contre les rayonnements - Google Patents

Élément de protection contre les rayonnements, arrangement et procédé de protection contre les rayonnements

Info

Publication number
EP2276605A1
EP2276605A1 EP09727748A EP09727748A EP2276605A1 EP 2276605 A1 EP2276605 A1 EP 2276605A1 EP 09727748 A EP09727748 A EP 09727748A EP 09727748 A EP09727748 A EP 09727748A EP 2276605 A1 EP2276605 A1 EP 2276605A1
Authority
EP
European Patent Office
Prior art keywords
radiation
radiation protection
wall
chamber
protection element
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Withdrawn
Application number
EP09727748A
Other languages
German (de)
English (en)
Inventor
Andreas Trautmann
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40801915&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2276605(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP2276605A1 publication Critical patent/EP2276605A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • B23K26/706—Protective screens

Definitions

  • Radiation protection element Radiation protection element, radiation protection arrangement and method
  • the present invention relates to a radiation protection element, a radiation protection arrangement and a radiation protection method for protection against the escape of rays from a room, in particular for protection against escaping from a room laser beams.
  • reference numerals 14a, 15a, 16a designate different radiation sources within a partial volume of a two-wall protection wall having an inner wall member 11 and an outer wall member 12 arranged such that the emitted radiation is applied to various opposed sensors 14b, 15b, 16b meets.
  • a specific modulation pattern is generated within the sub-volume in the absence of interfering laser radiation. Penetrating after destruction of the inner wall element 11 interfering laser radiation 13 in the sub-volume, the modulation pattern is allegedly disturbed detectable, so that when an electronic detection of the disturbance emergency stop the laser system can be triggered. How exactly the disturbance of the modulation field and its detection look is not disclosed in DE 10 2006 026 555 A1.
  • EP 0 912 858 B1 discloses a wall element for a protective device surrounding a working or effective area. gene laser beams of a laser source, which is multi-layered.
  • the radiation protection element according to the invention according to claim 1, the radiation protection arrangement according to the invention according to claim 14 and the radiation protection method according to claim 19 have the advantage that they only require a passive outer protective wall, wherein the active inner protective wall can be made very compact.
  • the active inner protective wall can be made very compact.
  • the incident interfering radiation in the active inner wall is not detected, but the change of a physical quantity, which is different from the interfering rays or does not correlate with the rays.
  • it is an indirect proof of the disturbing rays in the radiation protection elements.
  • the invention is thus completely independent of the wavelength of the harmful interfering rays.
  • the radiation protection elements can thus be used inter alia for all types of laser or other types of radiation.
  • the idea underlying the present invention consists in a continuous check of the mechanical integrity of a plurality of radiation protection elements, which are provided on the inside of the passive inner protective wall, preferably completely and form-fitting area-wide.
  • a protective measure can be initiated immediately if the integrity of the internal radiation protection elements is no longer present.
  • the injury of the radiation protection elements can be caused by mechanical damage induced by the radiation source, but also by other mechanical damage (eg damage by robots or the like). be called.
  • the spectral range of the radiation source is irrelevant in the radiation protection arrangement according to the invention, since the physical quantity, whose change is detected in the chamber of the radiation protection element, is different from the rays or does not correlate with the rays.
  • the active inner protective wall formed by the radiation protection elements on the inside of the passive outer protective wall serves only to generate an output signal within a certain short reaction time, in response to which a control device triggers a protective measure, for example switching off the radiation source.
  • the interfering damaging radiation may and may strike the passive outer wall, but that the radiation protection assembly will shut off before the passive outer wall is breached.
  • the passive outer protective wall is preferably to be designed such that it can withstand the direct exposure to damaging radiation or other mechanical influences, such as by robots, for a certain time interval (cf. DIN clearance EN, gap 60825: 1-4), which is longer than a reaction time or response time to trigger the protective measure.
  • simple wall systems made of polycarbonate or Perspex (trade name Plexiglas or Lexan) for the passive outer protective wall can also be used in the present invention. These are preferably filled with refractory material, which has a good temperature interaction with high heat conduction. Such materials are usually ceramics, z. Clays with high Al 2 O 3 and glass contents, or metallic see materials in plates, z. As aluminum, copper or steel, or a sandwich of various of these materials. The thickness of the passive outer protective wall and in particular their production costs can be reduced by the use of these materials, since a longer service life is achieved with less material use.
  • the detection device has one or more radiation sensors which are set up to detect a change in intensity of reference beams which can be generated in the space by a reference radiation source.
  • a reflection coating for reflecting the reference beams is provided on the inside of the perforable wall.
  • the wall in the unperforated state is radiation-tight with respect to the reference beams.
  • the reference radiation is broadband light.
  • the detection device has one or more pressure sensors, which are set up to detect a change in pressure in the chamber, wherein the pressure change can be triggered by perforating a reference chamber under overpressure by the rays penetrating into the chamber.
  • the perforable wall has one or more pressure equalization holes. This allows an abrupt pressure reduction.
  • the detection device has one or more strain sensors, which are set up to detect a change in strain of a clamped membrane located in the chamber, wherein the strain change can be triggered by perforating the membrane by the rays penetrating into the chamber.
  • an absorption coating for absorbing the rays is provided on the outside of the perforable wall.
  • the perforable wall consists of a film-like material, in particular a plastic material.
  • the perforable wall has a flat polyhedral shape with a substantially mutually parallel arranged front and back and corresponding edges.
  • the output signal is available on the rear side.
  • the edges are inclined or stepped. Providing the radiation protection elements with inclined or stepped edges enables an overlapping form-fitting arrangement, by means of which it can be ensured that the inner active protective wall consisting of the radiation protection elements does not escape from the radiation can be bypassed, so the radiation perforated at least one radiation protection element.
  • 1 a is a schematic cross-sectional view of a radiation protection arrangement consisting of a plurality of radiation protection elements according to a first embodiment of the present invention
  • FIG. 1b shows a plan view of a wall of the radiation protection arrangement according to FIG. 1;
  • FIG. 2a-c schematic representations of a radiation protection element according to the first embodiment of the present invention, namely FIG. 2a in cross section QS, FIG. 2b in rear view and FIG. 2c in front view;
  • Fig. 3 is a block diagram for explaining the electrical connection of the radiation protection elements of the first embodiment of the present invention.
  • FIG. 4 is a schematic representation of a radiation protection element according to a second embodiment of the present invention.
  • FIG. 5 is a schematic representation of a radiation protection element according to a third embodiment of the present invention
  • 6a-c are schematic representations of a radiation protection element according to a fourth embodiment of the present invention, namely FIG. 6a in cross-section QS, FIG. 6b in rear view, and FIG. 6c in front view;
  • FIG. 7a-c show schematic illustrations of a radiation protection element according to a fifth embodiment of the present invention, namely FIG. 7a in cross section QS, FIG. 7b in rear view, and FIG. 7c in front view;
  • Fig. 8 is a schematic representation of one of the
  • FIG. 1 a is a schematic cross-sectional view of a radiation protection arrangement consisting of a plurality of radiation protection elements according to a first embodiment of the present invention
  • FIG. 1 b is a plan view of a wall of the radiation protection arrangement according to FIG. 1.
  • reference character R describes a space in which a workpiece W is processed with a laser radiation source L by laser beams ST.
  • the space R is surrounded on all sides by a passive outer protective wall 5, which consists of a clay ceramic in this example.
  • the thickness of the outer passive wall 5 is for example 10 cm.
  • On the inside of the passive outer protective wall 5 glued by an adhesive layer 35 is a plurality of radiation protection elements El, E2, E3, E4, ..., El6, which have the shape of flat cubes and form an active inner wall 3.
  • the front and the back of the rays are Protective elements El to El6 much larger than their edge surfaces.
  • the Strahlenschelernente El to E16 are, as shown in Fig. Ib for the wall 31, adhered gapless and positive fit.
  • the radiation protection elements on the other three walls 32, 33 and 34 are provided.
  • the laser beams ST which are to be directed onto the workpiece W, to be jettisoned by the laser radiation source L as jets ST 1 onto a radiation protection element, here for example radiation protection element E 2, on the inner side active wall 3 are directed, so that the radiation protection element undergoes a perforation P on its inside.
  • a radiation protection element here for example radiation protection element E 2
  • the radiation protection element undergoes a perforation P on its inside.
  • reference numeral SE further denotes a reference radiation source which emits beams STR of broadband visible light.
  • the radiation protection elements E1 to E16 in the first embodiment of the present invention are designed such that in the absence of the perforation, as in the intact state, no rays STR of the reference radiation source SE penetrate into the radiation protection elements.
  • the perforation P of a radiation protection element in this case the radiation protection element E2
  • the rays STR of the reference radiation source penetrate into the interior of the relevant radiation protection element, in this case E2, and trigger a light detection there, which switches off immediately the laser radiation source L leads as a protective measure.
  • the radiation protection elements may have a much smaller thickness, for example, only a few centimeters, as the passive outer protective wall. 5
  • Figs. 2a to c are schematic diagrams of a radiation protection element according to the first embodiment of the present invention, Fig. 2a in cross-section QS (see Figs Ia), Fig. 2b in rear view and Fig. 2c in front view.
  • the radiation protection element E 2 in FIG. 1 a, b has an inner chamber 12, which is surrounded on all sides by a wall W 2 which can be perforated by the rays ST of the laser radiation source L.
  • the wall material is a thin plastic film which is dimensionally stable in such a way that the radiation protection elements E1 to E16 can maintain their flat cubic shape before and after mounting on the passive outer protective wall 5.
  • the chamber 12 Provided in the chamber 12 are four radiation sensors S1, S2, S3, S4, which are set up to detect a change in intensity of the reference beams STR, in this case light beams, of the reference radiation source SE when a perforation P occurs in the wall W2.
  • the inside of the wall W2 is provided with a reflection coating, for example of silver.
  • corresponding lines L1 to L4 are connected to the radiation sensors S1 to S4, which are led through the rear side RS of the radiation protection element E2 through light-tight feedthroughs D1-D4 to the outside of the chamber 12.
  • the lines Ll to L4 are drawn in Fig. 2b as a single lines, these lines can of course be provided as a ribbon cable o. ⁇ .
  • the radiation protection elements El-El ⁇ are provided on all sides or at least on their front side VS with an absorption coating AB, which ensures that interfering rays ST 'of the laser radiation source L cause immediate immediate destruction of the wall W2 virtually without any Delay to minimize the trip time.
  • the absorption coating AB may be, for example, a black color, which prevents the rays ST 1 from being unnecessarily scattered back into the space R.
  • the reference radiation source SE provides a signal SEC in the event of inoperability of the reference radiation source SE, e.g. via a line, not shown.
  • a transmission sensor TR which checks the atmosphere in the space R for its transmissivity in light and supplies a malfunction signal SET, e.g. via a line, not shown, if the light transmissivity delivers below a predetermined value, thus making reaching the radiation protection elements El to El6 impossible by the reference beams STR of the reference radiation source SE.
  • a malfunction signal SET e.g. via a line, not shown
  • Fig. 3 is a block diagram for explaining the electrical connection of the radiation protection elements of the first embodiment of the present invention.
  • reference numeral ECU designates a control means which receives the output signals on the lines Ll to L4 of the radiation protection elements El to El ⁇ , ... of Fig. 1. Furthermore, the control device ECU receives the radio incapaci- tation signal SEC of the reference voltage source SE and the malfunction signal SET of the transmission sensor TR.
  • the control unit ECU By comparing these signals L1 to L4,..., SET, SEC with corresponding desired levels, the control unit ECU generates a signal SIG for switching off the laser radiation source L if it can be deduced from these signals that a radiation protection element is perforated Abnormality of the reference radiation source SE or a transmission incapacity of the space R is present.
  • FIG. 4 is a schematic representation of a radiation protection element according to a second embodiment of the present invention.
  • two radiation are protection elements El ', E2' are shown which have in contrast to the radiation protection elements El, E2 shown in FIG. 1 inclined edges 1 Pl, P2 '.
  • the interfering radiation SE 1 can not bypass the radiation protection elements El 1 , E 2 'by an intervening gap and perforate at least one wall W 1', W 2 'of the two road protection elements El', E 2 ' got to .
  • FIG. 5 is a schematic representation of a radiation protection element according to a third embodiment of the present invention.
  • two radiation protection elements El '', E2 '' are shown, which have walls Wl 1 'or W2''to be perforated, wherein the edges Pl'',P2''are stepped, can achieve the same effect as in the second embodiment shown in FIG. 4th
  • a groove-shaped stepping or multiple groove-shaped or multi-stepped stepping or the like can be provided to ensure a joint tightness.
  • FIG. 6a-c are schematic representations of a radiation protection element according to a fourth embodiment of the present invention, namely FIG. 6a in cross section QS, FIG. 6b in rear view and FIG. 6c in front view.
  • reference symbol E2 ''' designates a radiation protection element which has a wall W2''in which pressure equalization openings O1 to O18 are provided, in the chamber 12''' of the radiation protection element E2 '' a pressure sensor SP is provided. which detects a pressure P 1 in the chamber 12 '''and supplies a corresponding pressure signal via a line LSP to the outside of the chamber 12''' on its rear side RS "'.
  • a reference chamber AI in which an overpressure P prevails, for example in the form of an airbag.
  • This airbag AI may contain air or inert gas under pressure P and be made of an elastic material. It can be perforated by penetrating the radiation ST 'into the chamber 12' ", after which an abrupt pressure change occurs, which can be detected by the pressure sensor SP and can be supplied as an output signal LSP to the control device ECU, which analogously to the description in FIG 3 initiates a corresponding protective measure via the signal SIG, for example switching off the laser radiation device L.
  • FIG. 7a-c are schematic representations of a radiation protection element according to a fifth embodiment of the present invention, namely FIG. 7a in cross-section QS, FIG. 7b in rear view, and FIG. 7c in front view.
  • reference symbol E2 "'designates a radiation protection element with a wall W2""which encloses a chamber 12"' on all sides.
  • clamps Vl, V2, V3, V4 clamped in the chamber 12 1 ⁇ ' is a membrane MB, which is under a voltage SP.
  • expansion sensors SIa to S4a are provided, which are arranged to detect a change in the strain of the clamped membrane MB, which is triggered by perforating the membrane MB by the rays ST 'penetrating into the chamber 12''''.
  • Corresponding signal lines Lla to L4a are led to passages Dia to D4a on the rear side RS '''' of the radiation protection element E2 '''', from where they can be passed to the control device ECU analogous to the description of FIG.
  • the membrane MB may be made of plastic or glass or other material that is easily destroyed by the penetrating interfering radiation ST '.
  • the shape of the radiation protection elements is chosen only by way of example and can be varied in various ways, for. B. honeycomb, triangular, trapezoidal, etc. Also, the materials listed are chosen only by way of example.
  • the inner active wall was described in the above examples as complete and area-covering. Of course, it is possible with limited freedom of movement of the radiation source to restrict this active inner wall to only the vulnerable areas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Lasers (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne un élément de protection contre les rayonnements, un arrangement de protection contre les rayonnements et un procédé de protection contre les rayonnements pour protéger contre la sortie de rayons d’un espace, notamment pour protéger contre les rayons laser qui sortent d’un espace. Les éléments de protection contre les rayonnements comprennent une chambre (I2; I2'''; I2'''') qui est entourée de tous les côtés par une paroi (W2; W2', W2''; W2'''; W2'''') pouvant être perforée par les rayons (ST'). La chambre (I2; I2'''; I2'''') contient un dispositif de détection (S1-S4; SP; S1a-S4a) pour détecter une modification d’une grandeur physique (STR; P'; SP) dans la chambre (I2; I2'''; I2''''), laquelle se produit après une perforation (P) de la paroi (W2; W2', W2"; W2'''; W2'''') par les rayons (ST'), et pour générer un signal de sortie (L1-L4; LSP; L1a-L4a) correspondant qui est disponible pour initier une mesure de protection à l’extérieur de la chambre (I2; I2'''; I2''''). La grandeur physique (STR; P'; SP) est différente des rayons (ST').
EP09727748A 2008-04-02 2009-04-01 Élément de protection contre les rayonnements, arrangement et procédé de protection contre les rayonnements Withdrawn EP2276605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008016856A DE102008016856B4 (de) 2008-04-02 2008-04-02 Strahlenschutzelement und Strahlenschutzanordnung
PCT/EP2009/053884 WO2009121907A1 (fr) 2008-04-02 2009-04-01 Élément de protection contre les rayonnements, arrangement et procédé de protection contre les rayonnements

Publications (1)

Publication Number Publication Date
EP2276605A1 true EP2276605A1 (fr) 2011-01-26

Family

ID=40801915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09727748A Withdrawn EP2276605A1 (fr) 2008-04-02 2009-04-01 Élément de protection contre les rayonnements, arrangement et procédé de protection contre les rayonnements

Country Status (3)

Country Link
EP (1) EP2276605A1 (fr)
DE (1) DE102008016856B4 (fr)
WO (1) WO2009121907A1 (fr)

Cited By (1)

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CN112045654A (zh) * 2020-08-11 2020-12-08 上海有个机器人有限公司 一种无人密闭空间的检测方法、装置和机器人

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DE202009004927U1 (de) * 2009-06-17 2010-10-28 Reis Lasertec Gmbh Laserschutzkabine mit Laserschutzwandung
DE102013107365C5 (de) * 2013-07-11 2021-03-25 Krauss-Maffei Wegmann Gmbh & Co. Kg Laserpanzerung
DE102014115304A1 (de) 2014-10-21 2016-04-21 Reis Gmbh & Co. Kg Maschinenfabrik Verfahren zum Überwachen einer Strahlung
DE102014116746B4 (de) * 2014-11-17 2016-11-10 Jenoptik Automatisierungstechnik Gmbh Modulare Laserschutzwand

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DE19629037C1 (de) * 1996-07-18 1997-07-31 Erwin Martin Heberer Wandelement für eine einen Arbeits- oder Wirkungsbereich umgebende Schutzvorrichtung gegen Laserstrahlen einer Laserquelle
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112045654A (zh) * 2020-08-11 2020-12-08 上海有个机器人有限公司 一种无人密闭空间的检测方法、装置和机器人
CN112045654B (zh) * 2020-08-11 2022-01-28 上海有个机器人有限公司 一种无人密闭空间的检测方法、装置和机器人

Also Published As

Publication number Publication date
DE102008016856A1 (de) 2009-10-15
DE102008016856B4 (de) 2013-12-05
WO2009121907A1 (fr) 2009-10-08

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