WO2022096244A1 - Device and method for determining spatial position for an infrared measurement system - Google Patents

Device and method for determining spatial position for an infrared measurement system Download PDF

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Publication number
WO2022096244A1
WO2022096244A1 PCT/EP2021/078357 EP2021078357W WO2022096244A1 WO 2022096244 A1 WO2022096244 A1 WO 2022096244A1 EP 2021078357 W EP2021078357 W EP 2021078357W WO 2022096244 A1 WO2022096244 A1 WO 2022096244A1
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Prior art keywords
sensor
emitter
test object
reference point
determining
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PCT/EP2021/078357
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German (de)
French (fr)
Inventor
Benjamin Schlosser
Sven PROF. JÜTTNER
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Otto-Von-Guericke-Universität Magdeburg
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Publication of WO2022096244A1 publication Critical patent/WO2022096244A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/48—Thermography; Techniques using wholly visual means
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/034—Observing the temperature of the workpiece
    • 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
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125—Weld quality monitoring
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/07—Arrangements for adjusting the solid angle of collected radiation, e.g. adjusting or orienting field of view, tracking position or encoding angular position
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0896—Optical arrangements using a light source, e.g. for illuminating a surface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077—Imaging

Definitions

  • the present invention is in the field of sensors.
  • it relates to a device and a method with the help of which the relative position of an infrared sensor (IR sensor) to its surroundings can be determined and which allow a spatial assignment of the data that has been recorded by the IR sensor from a test object.
  • IR sensor infrared sensor
  • NIR near IR range
  • thermography which is used in non-destructive testing in industry. Common uses include finding bugs that aren't visible from the outside.
  • the quality of the component is checked by measuring the surface temperature with an IR sensor, e.g. B. with an infrared camera. If there is a defect on or near the component surface that impedes heat conduction in the component, this is reflected in a locally changed surface temperature. So e.g. B. cold or hot spots or local changes in temperature gradients can be observed. The temperatures or the changes in temperature are measured using the IR sensor, e.g. B. with the Infrared camera captured. The temperature data can then be displayed visually as a thermogram (false color image).
  • thermography An example of industrial application is the quality inspection of weld seams using thermography. Testing during the manufacturing process is desirable for the quality control of weld seams. B. the ejection of defective components for rework or an immediate evaluation and possibly required changes to the process parameters in the event of deviations, so that costly rework can be avoided.
  • Defects that are not visible from the outside and that significantly impair the quality of a weld seam include insufficient penetration depth and lack of fusion.
  • So e.g. B. identifies the temperature field of the cooling surface of a weld as an externally detectable information carrier for assessing the internal quality of the weld.
  • the present invention relates to a device for determining the current position of a measurement point of an IR sensor on a test object, the device comprising an IR emitter and an IR sensor, the IR emitter serving as a stationary reference point for the IR sensor.
  • the relative movement between the IR sensor and the test object is measured in order to be able to trace the data back to the stationary IR emitter as a reference point.
  • the IR sensor or the test object or both can be moved for the measurement, provided that the relative movement is recorded.
  • the IR sensor can be guided along the area to be measured.
  • the IR emitter can be used as a reference point for determining the location of the data captured by the IR sensor.
  • the present invention relates to a method for determining the current position of a measuring point on a test object, wherein the
  • Measuring point is detected by an IR sensor and an IR emitter is used as a stationary reference point for determining the current position of the measuring point.
  • the IR emitter can be any means that emits IR radiation that can be detected by the IR sensor.
  • a simple glow wire, glow plug, incandescent lamp, heating cartridge or the like can be used.
  • Two or more IR emitters can also be used.
  • IR sensors that can record measurement data from test specimens emitting IR radiation can be used as IR sensors.
  • Examples are thermal imagers, thermal line scan cameras and pyrometers.
  • All components or the like that can be detected using IR sensors can be used as a test object.
  • FIG. 1 shows a schematic plan view of the structure of a device according to the invention and its use in the quality control of a weld seam
  • FIG. 2 shows the structure according to FIG. 1 in an isometric view.
  • Thermography monitored and controlled One example is the well-known gas-shielded metal (MAG) welding process for welding thin steel sheets.
  • MAG gas-shielded metal
  • insufficient penetration depth and lack of fusion at the weld seam of the metal sheets are common defects that cannot be seen from the outside.
  • the temperature profile of the weld seam obtained is recorded immediately after the welding process and z. B. shown as a thermogram, and evaluated.
  • an IR emitter 1 is provided according to the invention of the IR sensor 2, z. B. a thermal imaging camera, and forms a stationary reference point for determining the position of the measuring points of the IR sensor 2. Using this fixed reference point, the relative position of the measurement location of the IR sensor 2 in the area of the weld seam 3 can then be assigned spatially without any problems.
  • FIG. 1 shows an IR emitter 1 made up of three glow elements a, bc and a moveable thermal imaging camera as an IR sensor 2.
  • the thermal imaging camera 2 follows a welding torch 4, with which two metal sheets 5, 6 are welded and records the heat distribution in the area of the weld 3 immediately after the welding process.
  • the recorded IR data are then further processed in a known manner to evaluate the quality of the weld seam 3, e.g. b. using software programs available for this purpose.
  • the precise position of detected deviations in the measurement area of the weld seam 3 as the test object can be determined.
  • the invention is equally suitable for the connection welding shown in the example for monitoring other welding processes, such as. B. build-up welding or additive welding.
  • the device and method according to the invention are distinguished by their simplicity, since a simple incandescent element such as an incandescent wire is sufficient as a locally fixed IR emitter 1 . reference list

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Radiation Pyrometers (AREA)

Abstract

The present invention relates to a device and a method for determining spatial position for an infrared measurement system. The device comprises a stationary IR emitter (1) as a reference point and an IR sensor (2). The IR emitter (1) is used as a stationary reference point for the determination of the position of the measurement points of the IR sensor (2) on an examined object, the measurement point being sensed by means of the IR sensor (2) and the current position of the measurement point being ascertained by means of the IR emitter (1) as a stationary reference point with respect to the IR sensor (2).

Description

Vorrichtung und Verfahren zur räumlichen Lagebestimmung eines Infrarotmesssystems Device and method for determining the spatial position of an infrared measuring system
Die vorliegende Erfindung liegt auf dem Gebiet der Sensorik. Insbesondere betrifft sie eine Vorrichtung und ein Verfahren mit deren Hilfe die relative Position eines Infrarotsensors (IR-Sensors) zu seiner Umgebung bestimmt werden kann, und die eine räumliche Zuordnung der Daten erlauben, die von dem IR-Sensor von einem Prüfobjekt erfasst worden sind. The present invention is in the field of sensors. In particular, it relates to a device and a method with the help of which the relative position of an infrared sensor (IR sensor) to its surroundings can be determined and which allow a spatial assignment of the data that has been recorded by the IR sensor from a test object.
Für Anwendungen im nahen IR-Bereich (NIR) gilt, dass nur Objekte, die ausreichend Strahlung im Bereich des IR-Sensors abstrahlen, für den IR- Sensor erfassbar sind. For applications in the near IR range (NIR), only objects that emit sufficient radiation in the range of the IR sensor can be detected by the IR sensor.
So zeigen Objekte mit Raumtemperatur gewöhnlich kein Signal, da die emittierte Wärmestrahlung dieser Objekte unterhalb der Schwelle der Empfindlichkeit von typischen IR-Sensoren liegt. For example, objects at room temperature usually do not show a signal, since the thermal radiation emitted by these objects is below the sensitivity threshold of typical IR sensors.
Es treten immer wieder Situationen auf, die es erfordern, die relative Position eines IR-Sensors bzw. des Sensormessfeldes zu ermitteln, so dass die vom IR- Sensor gemessenen Daten eines Prüfobjekts gleichfalls räumlich zugeordnet werden können. Situations arise again and again that require the relative position of an IR sensor or the sensor measuring field to be determined, so that the data of a test object measured by the IR sensor can also be assigned spatially.
Ein Beispiel hierfür ist die Thermografie, die bei der zerstörungsfreien Prüfung in der Industrie Anwendung findet. Zu den üblichen Anwendungen gehört das Auffinden von Fehlern, die von außen nicht sichtbar sind. An example of this is thermography, which is used in non-destructive testing in industry. Common uses include finding bugs that aren't visible from the outside.
Die Prüfung der Qualität des Bauteils erfolgt dabei durch die Messung der Oberflächentemperatur mit einem IR-Sensor z. B. mit einer Infrarotkamera. Liegt an oder nahe der Bauteiloberfläche ein Fehler vor, der die Wärmeleitung im Bauteil behindert, so äußert sich dies in einer lokal veränderten Oberflächentemperatur. So können z. B. kalte oder heiße Stellen oder lokale Veränderungen von Temperaturgradienten beobachtet werden. Die Temperaturen bzw. die Änderungen in der Temperatur werden mit dem IR- Sensor, z. B. mit der Infrarotkamera, erfasst. Die Temperaturdaten können dann als Thermogramm (Falschfarbenbild) visuell dargestellt werden. The quality of the component is checked by measuring the surface temperature with an IR sensor, e.g. B. with an infrared camera. If there is a defect on or near the component surface that impedes heat conduction in the component, this is reflected in a locally changed surface temperature. So e.g. B. cold or hot spots or local changes in temperature gradients can be observed. The temperatures or the changes in temperature are measured using the IR sensor, e.g. B. with the Infrared camera captured. The temperature data can then be displayed visually as a thermogram (false color image).
Ein Beispiel der industriellen Anwendung ist die Qualitätsprüfung von Schweißnähten mittels Thermografie. Wünschenswert für die Qualitätskontrolle von Schweißnähten ist die Prüfung im Verlauf des Herstellungsprozess, die z. B. das Ausschleusen von fehlerhaften Bauteilen zur Nacharbeit oder eine sofortige Auswertung und möglicherweise erforderliche Änderungen der Prozessparameter bei Abweichungen erlaubt, so dass aufwendige Nachbearbeitungen vermieden werden können. An example of industrial application is the quality inspection of weld seams using thermography. Testing during the manufacturing process is desirable for the quality control of weld seams. B. the ejection of defective components for rework or an immediate evaluation and possibly required changes to the process parameters in the event of deviations, so that costly rework can be avoided.
Von außen nicht sichtbare Fehler, die die Qualität einer Schweißnaht signifikant beeinträchtigen, sind unter anderem ungenügende Einbrandtiefe und Bindefehler. Defects that are not visible from the outside and that significantly impair the quality of a weld seam include insufficient penetration depth and lack of fusion.
Bei der herkömmlichen zerstörenden Prüfung werden die Werkstücke nachgelagert zum Herstellungsprozess zerstört, was nur stichprobenartig erfolgen kann und zudem zeit- und kostenintensiv ist. Wünschenswert war daher eine Qualitätskontrolle, die nicht nur zerstörungsfrei ist, sondern zudem kontinuierlich durchgeführt werden kann und die trotzdem Rückschlüsse auf die innere Beschaffenheit des Bauteils z B. einer Schweißnaht erlaubt. In conventional destructive testing, the workpieces are destroyed downstream of the manufacturing process, which can only be done on a random basis and is also time-consuming and costly. It was therefore desirable to have quality control that is not only non-destructive, but can also be carried out continuously and that still allows conclusions to be drawn about the internal condition of the component, e.g. a weld seam.
So wurde z. B. das Temperaturfeld der abkühlenden Oberfläche einer Schweißnaht als äußerlich erfassbarer Informationsträger zur Beurteilung der inneren Qualität der Schweißnaht identifiziert. So e.g. B. identifies the temperature field of the cooling surface of a weld as an externally detectable information carrier for assessing the internal quality of the weld.
Von essentieller Bedeutung ist jedoch eine exakte Lagebestimmung einer Störung oder Abweichung am untersuchten Prüfobjekt. Hier setzt die vorliegende Erfindung an. Of essential importance, however, is an exact determination of the position of a fault or deviation on the test object being examined. This is where the present invention comes in.
Die vorliegende Erfindung betrifft eine Vorrichtung zur Bestimmung der aktuellen Lage eines Messpunktes eines IR-Sensors an einem Prüfobjekt, wobei die Vorrichtung einen IR-Emitter und einen IR-Sensor umfasst, wobei der IR- Emitter als ortsfester Referenzpunkt für den IR-Sensor dient. Erfindungsgemäß wird die Relativbewegung zwischen IR-Sensor und Prüfobjekt gemessen, um die Daten auf dem ortsfesten IR-Emitter als Referenzpunkt zurückführen zu können. Es können für die Messung der IR- Sensor oder das Prüfobjekt oder auch beide bewegt werden, sofern die Relativbewegung erfasstwird. The present invention relates to a device for determining the current position of a measurement point of an IR sensor on a test object, the device comprising an IR emitter and an IR sensor, the IR emitter serving as a stationary reference point for the IR sensor. According to the invention, the relative movement between the IR sensor and the test object is measured in order to be able to trace the data back to the stationary IR emitter as a reference point. The IR sensor or the test object or both can be moved for the measurement, provided that the relative movement is recorded.
Beispielsweise kann der IR-Sensor entlang des zu vermessenden Bereichs geführt werden. For example, the IR sensor can be guided along the area to be measured.
Da die Position des IR-Emitters relativ zum IR-Sensor bekannt ist, kann der IR- Emitter als Referenzpunkt für die Lagebestimmung der mit dem IR- Sensor erfassten Daten dienen. Because the position of the IR emitter relative to the IR sensor is known, the IR emitter can be used as a reference point for determining the location of the data captured by the IR sensor.
Weiter betrifft die vorliegende Erfindung ein Verfahren zur Ermittlung der aktuellen Position eines Messpunktes an einem Prüfobjekt, wobei derFurthermore, the present invention relates to a method for determining the current position of a measuring point on a test object, wherein the
Messpunkt durch einen IR-Sensor erfasst wird und ein IR-Emitter als ortsfester Referenzpunkt für die Bestimmung der aktuellen Lage des Messpunktes verwendet wird. Measuring point is detected by an IR sensor and an IR emitter is used as a stationary reference point for determining the current position of the measuring point.
Erfindungsgemäß kann der IR-Emitter ein beliebiges Mittel sein, das eine IR-Strahlung abgibt, die durch den IR-Sensor erfassbar ist. Es kann ein einfacher Glühdraht, Glühkerze, Glühlampe, Heizpatrone oder dergleichen eingesetzt werden. According to the invention, the IR emitter can be any means that emits IR radiation that can be detected by the IR sensor. A simple glow wire, glow plug, incandescent lamp, heating cartridge or the like can be used.
Es können auch zwei oder mehrere IR-Emitter eingesetzt werden. Two or more IR emitters can also be used.
Als IR-Sensor können prinzipiell alle IR-Sensoren eingesetzt werden, die Messdaten von IR-Strahlung abgebenden Prüfkörpern erfassen können. Beispiele sind Wärmebildkameras, Wärmezeilenkameras und Pyrometer. In principle, all IR sensors that can record measurement data from test specimens emitting IR radiation can be used as IR sensors. Examples are thermal imagers, thermal line scan cameras and pyrometers.
Als Prüfobjekt kommen alle Bauteile oder dergleichen in Frage, die mittels IR-Sensoren erfasst werden können. All components or the like that can be detected using IR sensors can be used as a test object.
Nachfolgend wird die vorliegende Erfindung anhand eines Anwendungsbeispiels und unter Verweis auf die anliegenden Figuren näher erläutert. Es versteht sich jedoch, dass die vorliegende Erfindung nicht auf dieses konkrete Anwendungsbeispiel beschränkt ist, sondern prinzipiell überall dort eingesetzt werden kann, wo für die räumliche Zuordnung von Messdaten die relative Position eines IR-Sensors bzw. des Messfeldes eines IR-Sensors zu bestimmen ist. The present invention is explained in more detail below using an application example and with reference to the accompanying figures. However, it should be understood that the present invention is not limited to this specific one Application example is limited, but can in principle be used wherever the relative position of an IR sensor or the measuring field of an IR sensor is to be determined for the spatial assignment of measurement data.
Es zeigt It shows
Figur 1 schematisch den Aufbau einer erfindungsgemäßen Vorrichtung und deren Einsatz bei der Qualitätskontrolle einer Schweißnaht in der Draufsicht, und FIG. 1 shows a schematic plan view of the structure of a device according to the invention and its use in the quality control of a weld seam, and
Figur 2 den Aufbau gemäß Figur 1 in der isometrischen Ansicht. FIG. 2 shows the structure according to FIG. 1 in an isometric view.
In den Figuren dargestellt ist ein Aufbau zum Verbindungsschweißen von zweiShown in the figures is a set-up for joint welding of two
Blechen, als Stumpfstoß, wobei die Bleche nebeneinander liegen. Der Schweißvorgang und die Qualität der erhaltenen Schweißnaht werden mittelssheets, as a butt joint, with the sheets lying next to each other. The welding process and the quality of the weld obtained are checked by means of
Thermografie überwacht und kontrolliert. Ein Beispiel ist das bekannte Metall- Schutzgas(MSG)-Schweißverfahren zum Schweißen von Stahlfeinblechen. Dabei sind insbesondere eine ungenügende Einbrandtiefe und Bindefehler an der Schweißnaht der Bleche häufig auftretende von außen nicht erkennbare Defekte.Thermography monitored and controlled. One example is the well-known gas-shielded metal (MAG) welding process for welding thin steel sheets. In particular, insufficient penetration depth and lack of fusion at the weld seam of the metal sheets are common defects that cannot be seen from the outside.
Es wird das Temperaturprofil der erhaltenen Schweißnaht unmittelbar nach dem Schweißvorgang erfasst und z. B. als Thermogramm dargestellt, und ausgewertet. The temperature profile of the weld seam obtained is recorded immediately after the welding process and z. B. shown as a thermogram, and evaluated.
Anhand der erhaltenen Abbildung der Temperaturverteilung ist es jedoch nicht möglich, die erfassten Daten direkt einem konkreten Lagepunkt im Bereich der Schweißnaht zuzuordnen. However, based on the image of the temperature distribution obtained, it is not possible to assign the recorded data directly to a specific location in the area of the weld seam.
Wie in Figur 1 dargestellt, ist erfindungsgemäß ein IR-Emitter 1 vorgesehen, der von dem IR-Sensor 2, z. B. einer Wärmebildkamera, erfasst wird und einen ortsfesten Bezugspunkt zur Bestimmung der Lage der Messpunkte des IR- Sensors 2 bildet. Anhand dieses festen Bezugspunktes kann dann problemlos die relative Position des Messortes des IR-Sensors 2 im Bereich der Schweißnaht 3 räumlich zugeordnet werden. As shown in Figure 1, an IR emitter 1 is provided according to the invention of the IR sensor 2, z. B. a thermal imaging camera, and forms a stationary reference point for determining the position of the measuring points of the IR sensor 2. Using this fixed reference point, the relative position of the measurement location of the IR sensor 2 in the area of the weld seam 3 can then be assigned spatially without any problems.
Mit Hilfe der erfindungsgemäßen Vorrichtung mit IR-Emitter 1 können örtlich genau zuordbare Temperaturdaten erhalten werden. In der Figur 1 dargestellt ist ein IR-Emitter 1 aus drei Glühelementen a, b c und eine verfahrbare Wärmebildkamera als IR-Sensor 2. Die Wärmebildkamera 2 folgt einem Schweißbrenner 4, mit dem zwei Bleche 5, 6 verschweißt werden, und erfasst dabei die Wärmeverteilung im Bereich der Schweißnaht 3 unmittelbar nach dem Schweißvorgang. With the aid of the device according to the invention with an IR emitter 1, temperature data that can be precisely assigned locally can be obtained. FIG. 1 shows an IR emitter 1 made up of three glow elements a, bc and a moveable thermal imaging camera as an IR sensor 2. The thermal imaging camera 2 follows a welding torch 4, with which two metal sheets 5, 6 are welded and records the heat distribution in the area of the weld 3 immediately after the welding process.
Die erfassten IR-Daten werden anschließend zur Bewertung der Qualität der Schweißnaht 3 auf bekannte Art und Weise weiter verarbeitet, z. b. mittels hierfür erhältlicher Softwareprogramme. The recorded IR data are then further processed in a known manner to evaluate the quality of the weld seam 3, e.g. b. using software programs available for this purpose.
Mit Hilfe des oder der durch den IR-Emitter 1 bereit gestellten Referenzpunkte kann die genaue Position von erfassten Abweichungen im Messbereich der Schweißnaht 3 als Prüfobjekt bestimmt werden. With the aid of the reference point(s) provided by the IR emitter 1, the precise position of detected deviations in the measurement area of the weld seam 3 as the test object can be determined.
Da die Auswertung in Echtzeit erfolgen kann, können zudem bei Auftreten von Unregelmäßigkeiten sofort Maßnahmen zur Korrektur eingeleitet oder beispielsweise Schweißnahtbereiche für eine gesonderte Prüfung markiert werden. Since the evaluation can take place in real time, corrective measures can be taken immediately if irregularities occur or, for example, weld seam areas can be marked for a separate inspection.
Die Erfindung eignet sich gleichermaßen wie für das im Beispiel gezeigte Verbindungsschweißen zur Überwachung anderer Schweißverfahren, wie z. B. Auftragschweißung oder additiven Schweißung. The invention is equally suitable for the connection welding shown in the example for monitoring other welding processes, such as. B. build-up welding or additive welding.
Die erfindungsgemäße Vorrichtung und Verfahren zeichnen sich durch ihre Einfachheit aus, da bereits ein simples Glühelement wie ein Glühdraht als lokal fester IR-Emitter 1 ausreicht. Bezuaszeichenliste The device and method according to the invention are distinguished by their simplicity, since a simple incandescent element such as an incandescent wire is sufficient as a locally fixed IR emitter 1 . reference list
1 IR- Emitter 1 IR emitter
2 IR-Sensor 3 Schweißnaht 2 IR sensor 3 weld seam
4 Schweißbrenner 4 welding torches
5, 6 zu verbindende Bauteile, z. B. Bleche 5, 6 components to be connected, e.g. B. Sheets

Claims

7 Ansprüche 7 claims
1. Vorrichtung zur räumlichen Lagebestimmung eines IR-Messsystems, wobei die Vorrichtung einen ortsfesten IR-Emitter (1) als Referenzpunkt und einen IR-Sensor (2) umfasst, wobei der IR-Emitter (1) als ortsfester Referenzpunkt zur Lagebestimmung der Messpunkte des IR-Sensor (2) an einem Prüfobjekt dient. 1. A device for spatially determining the position of an IR measuring system, the device comprising a stationary IR emitter (1) as a reference point and an IR sensor (2), the IR emitter (1) serving as a stationary reference point for determining the position of the measuring points of the IR sensor (2) is used on a test object.
2. Vorrichtung nach Anspruch 1, wobei der IR-Sensor (2), ein Prüfobjekt oder beide beweglich ausgeführt sind. 2. Device according to claim 1, wherein the IR sensor (2), a test object or both are designed to be movable.
3. Vorrichtung nach Anspruch 1 oder 2, wobei der IR-Sensor (2) eine Wärmebildkamera, Wärmezeilenkamera oder Pyrometer ist. 3. Device according to claim 1 or 2, wherein the IR sensor (2) is a thermal imager, thermal line camera or pyrometer.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, wobei der IR-Emitter (1) ein Glühdraht, Glühkerze, Glühlampe oder Heizpatrone ist. 4. Device according to one of claims 1 to 3, wherein the IR emitter (1) is a filament, glow plug, incandescent lamp or heating cartridge.
5. Verfahren zur Bestimmung der aktuellen Lage eines Messpunktes eines IR- Sensors (2) an einem Prüfobjekt, wobei der Messpunkt durch einen IR-Sensor (2) erfasst wird und die aktuelle Lage des Messpunktes mit Hilfe eines IR-Emitters (1) als ortsfesten Referenzpunkt zu dem IR-Sensor ermittelt wird. 5. Method for determining the current position of a measuring point of an IR sensor (2) on a test object, the measuring point being detected by an IR sensor (2) and the current position of the measuring point using an IR emitter (1) as fixed reference point to the IR sensor is determined.
6. Verfahren nach Anspruch 5, wobei die Relativbewegung zwischen IR-Sensor (2) und einem Prüfobjekt gemessen wird, um die Daten auf den IR-Emitter (1) als ortsfesten Referenzpunkt zurückzuführen. 6. The method according to claim 5, wherein the relative movement between the IR sensor (2) and a test object is measured in order to trace the data back to the IR emitter (1) as a stationary reference point.
7. Verfahren nach Anspruch 5 oder 6, wobei als verfahrbarer IR-Sensor (2) eine Wärmebildkamera, Wärmezeilenkamera oder Pyrometer verwendet wird. 8 7. The method according to claim 5 or 6, wherein a thermal imager, thermal line camera or pyrometer is used as the movable IR sensor (2). 8th
8. Verfahren nach einem der Ansprüche 5 bis 7, wobei als IR-Emitter (1) ein Glühdraht, Glühkerze, Glühlampe oder Heizpatrone verwendet wird. 8. The method according to any one of claims 5 to 7, wherein a filament, glow plug, incandescent lamp or heating cartridge is used as the IR emitter (1).
9. Verfahren nach einem der Ansprüche 5 bis 8, wobei das Temperaturfeld der abkühlenden Oberfläche einer Schweißung und gegebenenfalls angrenzender Oberflächen von zu verbindenden Komponenten (5, 6) im Bereich einer Schweißnaht (3) erfasst wird. 9. The method according to any one of claims 5 to 8, wherein the temperature field of the cooling surface of a weld and possibly adjacent surfaces of components to be connected (5, 6) in the region of a weld seam (3) is detected.
10. Verwendung der Vorrichtung nach einem der Ansprüche 1 bis 4 oder eines10. Use of the device according to any one of claims 1 to 4 or one
Verfahrens nach einem der Ansprüche 5 bis 9, zur Bestimmung der aktuellen Lage eines Messpunktes eines IR-Sensors (2) an einem Prüfobjekt. Method according to one of Claims 5 to 9, for determining the current position of a measuring point of an IR sensor (2) on a test object.
11. Verwendung der Vorrichtung nach Anspruch 10, wobei das Prüfobjekt eine Schweißnaht (3) ist. 11. Use of the device according to claim 10, wherein the test object is a weld seam (3).
PCT/EP2021/078357 2020-11-03 2021-10-13 Device and method for determining spatial position for an infrared measurement system WO2022096244A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6177649B1 (en) * 1998-02-05 2001-01-23 Sollac Method and apparatus for regulating the position of a camera in a thermal control system for welding
DE102010014744A1 (en) * 2010-04-13 2011-10-13 Siemens Aktiengesellschaft Apparatus and method for projecting information onto an object in thermographic surveys

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6177649B1 (en) * 1998-02-05 2001-01-23 Sollac Method and apparatus for regulating the position of a camera in a thermal control system for welding
DE102010014744A1 (en) * 2010-04-13 2011-10-13 Siemens Aktiengesellschaft Apparatus and method for projecting information onto an object in thermographic surveys

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