DE19615244B4 - Sensor for radiation pyrometric measurement at high ambient temperature - Google Patents
Sensor for radiation pyrometric measurement at high ambient temperature Download PDFInfo
- Publication number
- DE19615244B4 DE19615244B4 DE19615244A DE19615244A DE19615244B4 DE 19615244 B4 DE19615244 B4 DE 19615244B4 DE 19615244 A DE19615244 A DE 19615244A DE 19615244 A DE19615244 A DE 19615244A DE 19615244 B4 DE19615244 B4 DE 19615244B4
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- window
- solder joints
- temperature
- radiation
- 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.)
- Expired - Fee Related
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 title claims abstract description 10
- 229910000679 solder Inorganic materials 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011149 active material Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000049 pigment Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 description 2
- 229910001632 barium fluoride Inorganic materials 0.000 description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
- G01J5/14—Electrical features thereof
- G01J5/16—Arrangements with respect to the cold junction; Compensating influence of ambient temperature or other variables
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/18—Condition of the laundry, e.g. nature or weight
-
- 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
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/064—Ambient temperature sensor; Housing temperature sensor; Constructional details thereof
-
- 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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/12—Temperature
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/64—Radiation, e.g. microwaves
Abstract
Sensor zur strahlungspyrometrischen Messung der Temperatur eines Meßobjektes, insbesondere unter Bedingungen hoher Umgebungstemperaturen am Sensor im Innenraum eines Heißlufttrockners oder einer Wärmebehandlungsanlage, bestehend aus einem wärmeleitenden Gehäuse (1) mit einem im langwelligen Infrarotbereich strahlungsdurchlässigen Fenster (2), hinter dem gegenpolar in Reihe geschaltete Thermosäulen (3, 4) liegen, deren Drahtelemente (5) aus gegenseitig thermoelektrisch aktiven Materialien bestehen, wobei die Drahtelemente (5) etwa achsparallel in einem etwa zylindrischen Körper (6) aus einem schlecht wärmeleitenden temperaturbeständigen Material symmetrisch zueinander angeordnet sind und die Lötstellen (7, 71, 72) auf den Grundflächen (61, 62) des Körpers (6) liegen, wobei einige der hinter dem Fenster (2) liegenden Lötstellen (71, 72) durch einen strahlungsundurchlässigen Schild (8) abgedeckt sind, dadurch gekennzeichnet, daß am Fenster (2) ein Thermoelement (9) zur Erfassung der Eigentemperatur des Sensors am Schild (8) angeordnet ist.sensor for the radiation pyrometric measurement of the temperature of a test object, especially under conditions of high ambient temperatures at the sensor in the interior of a hot air dryer or a heat treatment plant, consisting of a thermally conductive casing (1) with a radiation-permeable window in the long-wave infrared range (2), behind the opposite polarity in series thermopiles (3, 4), the wire elements (5) of mutually thermoelectric consist of active materials, wherein the wire elements (5) approximately axially parallel in a roughly cylindrical body (6) from a poorly heat-conducting temperature resistant Material are arranged symmetrically to each other and the solder joints (7, 71, 72) on the bases (61, 62) of the body (6), with some of the behind the window (2) lying solder joints (71, 72) covered by a radiopaque plate (8) are characterized in that at the window (2) a thermocouple (9) arranged to detect the temperature of the sensor on the shield (8) is.
Description
Die Erfindung betrifft einen Sensor zur strahlungspyrometrischen Messung der Temperatur eines Meßobjektes nach dem Oberbegriff des Anspruches 1 und dem Oberbegriff des Anspruchs 2.The The invention relates to a sensor for radiation pyrometric measurement the temperature of a test object according to the preamble of claim 1 and the preamble of the claim Second
Ein derartiger Sensor ermöglicht die berührungslose Messung der Oberflächentemperatur von festen Werkstoffen, Materialien und Erzeugnissen insbesondere im Innern von Heißlufttrocknern und Wärmebehandlungsanlagen unter Bedingungen hoher Umgebungstemperaturen und an Stellen, die visuell von außen nicht zugängig sind. Die durch mehrere innerhalb der Anlage in unmittelbarer Nähe der zu messenden Oberfläche angeordnete Sensoren erhaltene Kenntnis des räumlichen und zeitlichen Temperaturprofils des zu behändelnden Materials ist neben anderen Prozeßparametern eine wichtige Voraussetzung zur optimierten Prozeßführung im Hinblick auf Wirtschaftlichkeit und Qualitätssicherung.One such sensor allows the non-contact Measurement of the surface temperature of solid materials, materials and products in particular inside hot air dryers and heat treatment plants under conditions of high ambient temperatures and in places that visually from the outside not accessible are. The by several within the plant in the immediate vicinity of the measuring surface arranged sensors obtained knowledge of the spatial and temporal temperature profile of the one to be handled Material is an important prerequisite in addition to other process parameters for optimized process control in the In terms of cost-effectiveness and quality assurance.
In der älteren Patentanmeldung P 44 41 257.6 ist ein Sensor zur strahlungspyrometrischen Messung von Temperaturen mittels Thermosäulen unter Anwendung von Werkstoffen und Bauelementen vorgeschlagen, die gegenüber Temperaturen bis zu 400°C und mehr beständig sind, so daß dies Messungen unter Bedingungen hoher Umgebungstemperaturen ermöglicht, ohne daß Maßnahmen zur Kühlung des Sensors erforderlich sind.In the older one Patent Application P 44 41 257.6 is a sensor for radiation pyrometric measurement of temperatures by means of thermopiles below Application of materials and devices proposed that are resistant to temperatures up to 400 ° C and more resistant are, so this Enables measurements under conditions of high ambient temperatures, without action for cooling of the sensor are required.
Das Prinzip dieses Sensors beruht darauf, daß die Lötstellen der Thermosäulen auf den Grundflächen eines zylindrischen Körpers aus hitzebeständigem, schlecht wärmeleitendem Material angeordnet sind, wobei die aus gegenseitig thermoelektrisch aktivem Material bestehenden Drahtelemente zwischen den Lötstellen achsparallel durch den Körper geführt werden. Eine Gruppe von Lötstellen liegt hinter einem strahlungsdurchlässigen Fenster, wobei eine andere Gruppe von Bezugslötstellen durch einen strahlungsundurchlässigen Schild gegenüber der Strahlung abgedeckt ist.The Principle of this sensor is based on the fact that the solder joints of the thermopile on the base areas a cylindrical body made of heat-resistant, poor heat-conducting Material are arranged, wherein the mutually thermoelectrically active Material existing wire elements between the solder joints parallelled through the body. A group of solder joints lies behind a radiation-permeable window, with a other group of reference solder joints by a radiopaque Shield opposite the Radiation is covered.
Die Kompensation nichtstrahlungsbedingter Temperaturunterschiede zwischen den Lötstellen wird dabei dadurch erreicht, daß die gleich aufgebauten Thermosäulen gegenpolar in Reihe geschaltet werden. Zur Verbesserung der Kompensation von durch inhomogene Temperaturverteilung im Sensor verursachten Störungen werden die Thermosäulen weiter aufgeteilt in nacheinander angeordnete, wechselweise gegenpolar in Reihe geschaltete Gruppen, wobei die dem Fenster zugewandten Gruppen der Lötstellen wechselweise abgedeckt sind.The Compensation of non-radiation-related temperature differences between the solder joints will thereby achieved by the identical thermopiles be connected in polarity in series. To improve the compensation caused by inhomogeneous temperature distribution in the sensor disorders the thermopiles will continue divided into successively arranged, alternately opposite polarity groups connected in series, those facing the window Groups of solder joints are covered alternately.
Bei einer schnellen Änderung der Umgebungstemperatur initiiert das sich dabei temporär aufbauende Temperaturgefälle zwischen dem Bereich des Fensters mit dem Schild und den der Strahlung ausgesetzten Lötstellen einen Strahlungsaustausch, der in der Kompensationssäule eine Störung des Signals bedingt, bis sich ein neuer stationärer Zustand eingestellt hat.at a quick change The ambient temperature initiates this temporarily building temperature gradient between the area of the window with the shield and that of the radiation exposed solder joints a radiation exchange, in the compensation column a Disruption of the Conditionally conditional until a new steady state has set.
Bekannte
andere Sensoren zur strahlungspyrometrischen Temperaturmessung gemäß den Druckschriften
Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Sensor derart weiterzubilden, daß auch im instationären Fall während der durch Umgebungstemperaturschwankungen bedingten Änderung der Eigentemperatur eine zuverlässige Funktion gewährleistet ist.Of the Invention is based on the object, a generic sensor in such a way that also in the transient Case during the change due to ambient temperature fluctuations the self-temperature is a reliable function guaranteed is.
Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.The The object is achieved by the Characteristics of claim 1 solved.
In einer vereinfachten Ausbildung des Sensors gemäß Anspruch 2 wird auf eine Kompensations-Thermosäule verzichtet, und sowohl die strahlungssensitiven als auch die Vergleichslötstellen einer einzigen, den Sensor bildenden Thermosäule werden auf der vorderen, dem Meßobjekt zugewandten Grundfläche des Körpers angeordnet, wobei die Verbindungsdrähte zwischen den Lötstellen durch achsparallele Bohrungen über die hintere Grundfläche geführt sind.In a simplified embodiment of the sensor according to claim 2 is a Compensation thermopile omitted, and both the radiation-sensitive and the Vergleichlötstellen a single thermopile forming the sensor is placed on the front, the test object facing base of the body arranged, with the connecting wires between the solder joints through axially parallel holes over the rear base guided are.
Zweckmäßig ist der Schild aus einem Material mit einer guten Temperaturleitfähigkeit gefertigt und steht in wärmeleitender Verbindung mit dem Fenster, wodurch eine gleichmäßige Temperatur gewährleistet ist. Für eine Annäherung an einen schwarzen Strahler ist die der Thermosäule zugewandte Seite des Schildes mit einem Pigment geschwärzt.Is appropriate the shield made of a material with a good thermal conductivity manufactured and stands in thermally conductive Connection with the window, ensuring a uniform temperature is. For an approach to a black spotlight is the thermopile side facing the shield blackened with a pigment.
Ausführungsbeispiele der Erfindung ergeben sich aus der Beschreibung und der Zeichnung.embodiments The invention will become apparent from the description and the drawings.
Es zeigen:It demonstrate:
Auf
einem zylindrischen Tragkörper
In
einem zweiten Ausführungsbeispiel
gemäß den
Der
erfindungsgemäße Sensor
kann physikalisch wie folgt erklärt
werden:
Im stationären
Zustand, d. h. im Falle gleicher Temperaturverhältnisse TF im
gesamten Bereich der Frontfläche
des Sensors, ist das von den in Reihe geschalteten Thermosäulen
In the stationary state, ie in the case of equal temperature ratios T F in the entire region of the front surface of the sensor, that is of the series-connected thermopile
Hat
jedoch der mit dem Fenster
Die
dadurch verursachte Signalstörung
US ~ φS wird dem Signal UO aufgrund
der gegenpolaren Reihenschaltung beider Thermoketten mit umgekehrtem
Vorzeichen überlagert.
Das verbleibende Signal beträgt:
Daraus
ergibt sich
Hieraus ist ersichtlich, daß das Sensorsignal U hinsichtlich der aus diesem zu ermittelnden Objekttemperatur TO auf die Temperatur TS des Schildes zu beziehen ist. Voraussetzung ist allerdings ein Strahlungsübergang entsprechend dem Strahlungsgesetz für den schwarzen Strahler.It can be seen that the sensor signal U with respect to the object temperature T O to be determined from this is to refer to the temperature T S of the shield. However, a prerequisite is a radiation transition in accordance with the law of radiation for the blackbody.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19615244A DE19615244B4 (en) | 1996-04-18 | 1996-04-18 | Sensor for radiation pyrometric measurement at high ambient temperature |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19615244A DE19615244B4 (en) | 1996-04-18 | 1996-04-18 | Sensor for radiation pyrometric measurement at high ambient temperature |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19615244A1 DE19615244A1 (en) | 1997-10-23 |
DE19615244B4 true DE19615244B4 (en) | 2005-06-16 |
Family
ID=7791587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19615244A Expired - Fee Related DE19615244B4 (en) | 1996-04-18 | 1996-04-18 | Sensor for radiation pyrometric measurement at high ambient temperature |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19615244B4 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2141468A1 (en) | 2008-07-02 | 2010-01-06 | Mahlo GmbH & Co. KG | Sensor device for pyrometric measurement of the temperature of a measuring object |
CN106017061A (en) * | 2016-07-07 | 2016-10-12 | 无锡市昂益达机械有限公司 | Intelligent hot air dryer for textile fabric |
WO2023180812A1 (en) * | 2022-03-24 | 2023-09-28 | Excelitas Technologies Singapore Pte. Ltd. | Correction for non-radiation heat-flows in infrared temperature sensor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19643221B4 (en) * | 1996-10-19 | 2005-12-29 | Pleva Gmbh | Sensor for radiation pyrometric temperature measurement under conditions of high ambient temperatures |
GB0230043D0 (en) * | 2002-12-23 | 2003-01-29 | Bae Systems Plc | An apparatus for curing a composite laminate |
EP3483575B1 (en) * | 2017-11-09 | 2023-01-04 | IDT Europe GmbH | Temperature sensor module with integrated lid structure for spurious ir-cancellation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB867712A (en) * | 1958-07-01 | 1961-05-10 | Gen Electric Co Ltd | Improvements in or relating to thermoelectric devices for measuring thermal radiation |
GB2090418A (en) * | 1980-12-30 | 1982-07-07 | Horiba Ltd | Thermopile detector |
US5059543A (en) * | 1990-09-21 | 1991-10-22 | The Board Of Regents Acting For And On Behalf Of The University Of Michigan | Method of manufacturing thermopile infrared detector |
DE4441257A1 (en) * | 1994-11-19 | 1996-05-23 | Pleva Gmbh | Sensor for radiation pyrometic temperature measurement under conditions of high ambient temperatures |
-
1996
- 1996-04-18 DE DE19615244A patent/DE19615244B4/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB867712A (en) * | 1958-07-01 | 1961-05-10 | Gen Electric Co Ltd | Improvements in or relating to thermoelectric devices for measuring thermal radiation |
GB2090418A (en) * | 1980-12-30 | 1982-07-07 | Horiba Ltd | Thermopile detector |
US5059543A (en) * | 1990-09-21 | 1991-10-22 | The Board Of Regents Acting For And On Behalf Of The University Of Michigan | Method of manufacturing thermopile infrared detector |
DE4441257A1 (en) * | 1994-11-19 | 1996-05-23 | Pleva Gmbh | Sensor for radiation pyrometic temperature measurement under conditions of high ambient temperatures |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2141468A1 (en) | 2008-07-02 | 2010-01-06 | Mahlo GmbH & Co. KG | Sensor device for pyrometric measurement of the temperature of a measuring object |
DE102008031285A1 (en) | 2008-07-02 | 2010-01-07 | Mahlo Gmbh + Co. Kg | Sensor arrangement for the pyrometric measurement of the temperature of a measurement object |
CN106017061A (en) * | 2016-07-07 | 2016-10-12 | 无锡市昂益达机械有限公司 | Intelligent hot air dryer for textile fabric |
WO2023180812A1 (en) * | 2022-03-24 | 2023-09-28 | Excelitas Technologies Singapore Pte. Ltd. | Correction for non-radiation heat-flows in infrared temperature sensor |
Also Published As
Publication number | Publication date |
---|---|
DE19615244A1 (en) | 1997-10-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |