WO2021047884A1 - Thermomètre non invasif - Google Patents

Thermomètre non invasif Download PDF

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Publication number
WO2021047884A1
WO2021047884A1 PCT/EP2020/073392 EP2020073392W WO2021047884A1 WO 2021047884 A1 WO2021047884 A1 WO 2021047884A1 EP 2020073392 W EP2020073392 W EP 2020073392W WO 2021047884 A1 WO2021047884 A1 WO 2021047884A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting element
temperature sensor
container
temperature
medium
Prior art date
Application number
PCT/EP2020/073392
Other languages
German (de)
English (en)
Inventor
Daniel Koch
Marc Schalles
Harald Bründl
Stephan Wiedemann
Peter Wiedemann
Torsten Iselt
Christian Peuker
Pavo Vrdoljak
Georg Wolf
Christian Kallweit
Markus Mornhinweg
Alfred Umkehrer
Original Assignee
Endress+Hauser Wetzer Gmbh+Co. Kg
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 Endress+Hauser Wetzer Gmbh+Co. Kg filed Critical Endress+Hauser Wetzer Gmbh+Co. Kg
Publication of WO2021047884A1 publication Critical patent/WO2021047884A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
    • 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
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • 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
    • B23K9/20—Stud welding
    • B23K9/201—Stud welding of the extremity of a small piece on a great or large basis
    • 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
    • B23K9/20—Stud welding
    • B23K9/207—Features related to studs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/12—Vessels
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/20—Tools

Definitions

  • thermometer Non-invasive thermometer
  • the invention relates to a thermometer for determining and / or monitoring the temperature of a medium in automation technology, as well as a method for producing a device according to the invention.
  • thermometers which use the expansion of a liquid, a gas or a solid with a known expansion coefficient to measure the temperature, or those which relate the electrical conductivity of a material or a quantity derived from it to the temperature, such as the electrical resistance when using resistance elements or the thermoelectric effect in the case of thermocouples.
  • radiation thermometers especially pyrometers, the thermal radiation of a substance is used to determine the temperature.
  • NTC thermistors also known as NTC thermistors
  • a sensor element provided with connection wires and applied to a carrier substrate is used, for example, the rear side of the carrier substrate usually being coated with metal.
  • resistance elements which are given for example by platinum elements, which are also commercially available under the names PT10, PT100 and PT1000, are used as sensor elements.
  • thermocouples With temperature sensors in the form of thermocouples, on the other hand, the temperature is determined by a thermal voltage that is created between the thermo-wires made of different materials that are connected on one side.
  • Thermocouples according to DIN standard IEC584, e.g. thermocouples of type K, J, N, S, R, B, T or E, are usually used as temperature sensors for temperature measurement.
  • other pairs of materials in particular those with a measurable Seebeck effect, are also possible.
  • the accuracy of the temperature measurement depends sensitively on the respective thermal contacts and the prevailing heat conduction.
  • Role For a reliable temperature determination, it is important that the respective temperature sensor and the medium are essentially in thermal equilibrium, at least for a certain time, which is required to detect the temperature.
  • the time it takes for a thermometer to respond to a change in temperature is also known as the thermometer's response time.
  • a high measurement accuracy can be achieved in particular when the temperature sensor is immersed in the respective medium.
  • Numerous thermometers have become known in which the temperature sensor is more or less directly brought into contact with the respective medium. In this way, a comparatively good coupling between the medium and the temperature sensor can be achieved.
  • thermometers also called surface thermometers or contact sensors
  • the temperature sensors are not in direct contact with the respective process. This requires that various additional aspects must be taken into account in order to ensure a good thermal coupling.
  • the mechanical and thus also the thermal contact between the container and the thermometer is decisive for the achievable measurement accuracy. If there is insufficient contact, an exact temperature determination is not possible.
  • thermocouples which are welded directly to the outer surface or skin of the pipe or container, are often used as surface or skin point thermometers.
  • replacing the thermocouples can become a time-consuming and costly process, particularly as replacing them may require a temporary shutdown of the process and / or application.
  • designs of corresponding thermometers have become known for example from US5382093 or the previously unpublished European patent application with the file number 18198608.4, which allow a simple exchange of the temperature sensors.
  • thermometers for non-invasive temperature measurement have become known, for example in FIGS Documents US2016 / 0047697A1, DE102005040699B3, EP3230704B1 or EP2038625B1.
  • a central problem with non-invasive temperature determination is the dissipation of heat from the process to the environment. This ensures a significantly higher measurement error than in the case of direct introduction of the respective temperature sensor into the process.
  • thermometer for non-invasive temperature measurement which is characterized by a high level of measurement accuracy.
  • the object on which the invention is based is achieved by a device for determining and / or monitoring a temperature of a medium in a container, comprising a temperature sensor for Detection of the temperature and a connecting element which can be connected to the container in a materially bonded manner.
  • the receptacle is, for example, a container, a container or a pipeline.
  • the device is brought into thermal contact from an outer region of the container with the container.
  • the temperature of the medium is accordingly determined indirectly via a wall of the container and via the connecting element.
  • the device can optionally also have electronics.
  • the electronics can also be a separate component that can be connected to the device.
  • the temperature sensor is advantageously at least one connection wire for electrical
  • Assigned contacting which can also be passed through the sleeve, for example, at least in sections.
  • the material connection of the connecting element to the pipeline can advantageously ensure a reproducible thermal contact between the device and the container.
  • air gaps for example due to different surface properties and / or geometries of the connecting element and the container, can be avoided.
  • This improves the response time of a thermometer according to the invention and also improves the measurement accuracy.
  • One embodiment of the present invention includes that the material connection can be produced by means of a welding process, in particular by means of a welding process without the use of additional materials.
  • One advantage of welding is, among other things, that, apart from the two components to be welded, no other materials are required to produce the connection, as is the case, for example, with soldering.
  • a weld seam does not have any separating layers made of other materials. The result is very good thermal contact and good heat conduction from the medium in the container to the temperature sensor.
  • the welding process is a joining process using heat and / or pressure.
  • a stud welding process is preferably used in which an arc is ignited between an end face of a stud and the respective workpiece, here the connecting element and the container.
  • other welding processes in particular
  • Friction welding processes in which mechanical energy, in particular rotational energy, is converted into thermal energy are possible and fall under the present invention. Friction welding processes are, for example, advantageously characterized by a low heat input.
  • an end region of the connecting element at least partially has an outer diameter that is reduced compared to a central region of the connecting element.
  • Such a configuration of the connecting element is particularly advantageous in connection with a stud welding process. If another welding process, in particular a friction welding process, is used, a different configuration of the end region of the connecting element can be more expedient and advantageous.
  • thermocouple is a resistance element or a thermocouple.
  • the temperature sensor is introduced into the connecting element.
  • the temperature sensor can be glued or soldered into the connecting element, in particular in the area of an inner volume of the connecting element.
  • the connecting element is then materially connected to the container with the temperature sensor.
  • the connecting element serves as a protective tube for the temperature sensor, at least in sections.
  • the temperature sensor can be attached to the connecting element.
  • the temperature sensor can be detachably attachable to the connecting element.
  • the temperature sensor is introduced into a holding element which, in particular, can be detachably connected to the connecting piece.
  • a connection to the connecting element can be implemented in a particularly simple manner by means of the holding element.
  • the device comprises fastening means for producing a detachable connection between the temperature sensor and the connecting piece.
  • the fastening means preferably comprise at least two mutually complementary threads or a clamping element.
  • the connecting element can have a thread
  • the temperature sensor or possibly the holding element is provided with a second thread.
  • the clamping element can be arranged, for example, on the temperature sensor or possibly the holding element.
  • the connecting element is a welding stud, a solid or hollow cylinder, or a plug connector.
  • the connecting element is preferably made from a metallic material and / or designed in such a way that it can be connected to the container in a materially bonded manner.
  • one embodiment comprises that the device has a unit which comprises a material with anisotropic thermal conductivity and which is at least partially arranged in an inner volume of the connecting element.
  • the device has a unit which comprises a material with anisotropic thermal conductivity and which is at least partially arranged in an inner volume of the connecting element.
  • the object on which the invention is based is also achieved by a system for determining and / or monitoring a temperature of a medium in a container, comprising a container in which the medium is located, a temperature sensor for detecting the temperature, and a connecting element which is connected to the container is firmly connected.
  • the container can be a pipe section which can be introduced into an existing pipe system.
  • thermometer for non-invasive temperature measurement according to the prior art
  • 2 possible configurations for a connecting element according to the invention
  • 3 a first embodiment for a thermometer according to the invention with a temperature sensor introduced into the connecting element
  • thermometer 4 shows a second embodiment for a thermometer according to the invention with a temperature sensor integrated in a holding element
  • thermometer 5 shows various configurations for a thermometer according to the invention with fastening means for fastening the thermometer to the connecting piece;
  • thermometer 6 shows different configurations for a further configuration of a thermometer according to the invention with a temperature sensor integrated in a holding element
  • thermometer 7 an embodiment for a thermometer according to the invention using a unit made of a material with anisotropic thermal conductivity.
  • thermometer 1 shows a schematic illustration of a thermometer 1 according to the prior art with a measuring insert 3 and electronics 4.
  • the thermometer 1 is used to detect the temperature T of a medium M, which is in a container 2, here in the form of a pipeline.
  • the measuring insert 3 comprises a temperature sensor 5, which in the present case comprises a temperature-sensitive element in the form of a resistance element.
  • the temperature sensor 5 is electrically contacted via the connection lines 6a, 6b and connected to the electronics 4.
  • the thermometer 1 shown has a compact design with integrated electronics 4, in other thermometers 1 the electronics 4 can also be arranged separately from the measuring insert 3. It also has to
  • the temperature sensor 5 does not necessarily have to be a resistance element and the number of connection lines 6 used does not necessarily have to be two. Rather, the number of connecting lines 6 can be selected appropriately depending on the measuring principle used and the temperature sensor 5 used.
  • thermometer 1 the measurement accuracy of such a non-invasive thermometer 1 depends to a large extent on the respective materials and, in particular thermal, contacts, in particular in the area of the temperature sensor 5.
  • the temperature sensor 5 is in thermal contact with the medium M indirectly, i.e. via the measuring insert 3 and via the wall W.
  • a possible heat conduction from the medium M to the environment also plays a major role in this context 2 is connectable. In this way, reproducible thermal contact between the container 2 and the thermometer 1 can be ensured.
  • a connecting element 7 can be designed as a welding stud, here in the form of a solid cylinder (FIGS. 2a, 2e).
  • FIG. 2b configurations in the form of a hollow cylinder
  • Fig. 2c, 2d plug connectors
  • the preferred configurations for the connecting element 7 shown here are to be understood only as examples and that numerous other configurations are also conceivable and fall under the present invention.
  • the connecting elements 7 from FIG. 2 each have in sections a reduced outer diameter compared to a central region of the respective connecting element 7. This end area E serves to establish a material connection with the respective container 2.
  • the end areas E are designed in such a way that they each have a tip 8 with little
  • the end region E is designed in the shape of a truncated cone.
  • Such a variant is again preferably suitable in connection with a friction welding process.
  • the Connecting elements from FIGS. 2a and 2e also have a groove 9, which is optional and here serves as a thread undercut.
  • thermometers 1 The fastening of the temperature sensor 5 on or in the connecting element 7 takes place depending on the respective configuration of the connecting element 7.
  • the temperature sensor 5 can, for example, easily be introduced into an internal volume of the connecting element 7 become. Otherwise, it can be attached to the connecting element 7, for example slipped onto it, in numerous different ways (FIGS. 2c, 2d).
  • the device 1 comprises a connecting element 7 as shown in FIG. 2 b and a temperature sensor 5 which is fastened to the connecting element 7 in the inner volume Vi of the connecting element 7.
  • the temperature sensor 5 can be glued or soldered into the connecting element 7, for example.
  • the temperature sensor 5 is electrically contacted via the connection lines 6, which are led out of the connecting element 7.
  • a material connection 10 with a container 2 can be produced, as shown in FIG. 3b.
  • Device 1 can also be part of a system 11 which comprises the temperature sensor 1, the connecting element 7 and a container 2, for example in the form of a pipe section.
  • a measuring insert 3 containing the temperature sensor 5 can also be inserted into the
  • thermometer 1 In the embodiment of a thermometer 1 according to the invention according to FIG. 4, the connecting element is designed in the form of a solid cylinder, as shown in FIG. 2a.
  • the temperature sensor 5 and the connection lines 6 are arranged on a holding element 12, which is designed in the shape of a cap and can be attached to the connecting element.
  • FIG. 4a shows a corresponding thermometer 1
  • FIG. 4b shows the same thermometer in a state that is cohesively connected to a container 2 in the form of a pipeline.
  • a system 11 comprising a temperature sensor 5, a connecting element 7 and a container 2 can also be provided.
  • the connecting elements 7 are each materially connected 10 to the container 2.
  • the devices 1 each comprise fastening means 13 in the form of two mutually complementary threads 14, each with an external thread and an internal thread.
  • the respective external thread is located in the area of the connecting element 7; in the case of FIG. 5b, the connecting element 7 has an internal thread.
  • the temperature sensor 1 is introduced into a holding element 12 which has fastening means 13 in the form of a clamping element 15 (FIG. 6a).
  • the connecting element 7 is designed in the form of a plug connector, as shown in FIG. 2d (FIG. 6b).
  • the temperature sensor 5 can be detachably attached to the connecting element 7 by means of the holding element 12.
  • the device 1 can additionally have a unit 16 which has a
  • FIG. 7a shows a measuring insert 3 with a temperature sensor 5 (not shown here) and connection lines 6, which can be introduced into an internal volume V of a connecting element 7 configured as a hollow cylinder, as configured in FIG. 2a (FIG. 7b).
  • the unit 16 can be introduced into the inner volume V, which unit is configured here, for example, in the form of a graphite foil.
  • the unit 16 serves to redistribute heat in the internal volume Vi of the connecting element 7.
  • the container 2 is, for example, not necessarily a pipeline. Rather, containers, containers or other types of receptacles 2 can also be used.
  • the temperature sensor 5 does not necessarily have to be designed as a resistance element, for example. Rather, temperature sensors 5 in the form of thermocouples or other types of temperature sensors 5 are also conceivable.
  • a configuration as a system 11 with device 1 and container 2 is also conceivable. List of reference symbols

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

L'invention concerne un dispositif (1) de détermination et/ou de surveillance d'une température d'un milieu (M) dans un récipient (2), comprenant un capteur de température (5) pour détecter la température, et un élément de liaison (7) qui peut être relié au récipient (2) par liaison de matière. L'invention concerne en outre un système pourvu d'un dispositif (1) et d'un récipient (2).
PCT/EP2020/073392 2019-09-12 2020-08-20 Thermomètre non invasif WO2021047884A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019124607.5A DE102019124607A1 (de) 2019-09-12 2019-09-12 Nicht invasives Thermometer
DE102019124607.5 2019-09-12

Publications (1)

Publication Number Publication Date
WO2021047884A1 true WO2021047884A1 (fr) 2021-03-18

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Application Number Title Priority Date Filing Date
PCT/EP2020/073392 WO2021047884A1 (fr) 2019-09-12 2020-08-20 Thermomètre non invasif

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DE (1) DE102019124607A1 (fr)
WO (1) WO2021047884A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114406431A (zh) * 2022-03-15 2022-04-29 中国原子能科学研究院 电子束焊接温度的监测系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327252A2 (fr) * 1988-02-05 1989-08-09 Philip F. Finney Fixation d'un détecteur de température à résistance
US5382093A (en) 1993-02-22 1995-01-17 Gay Engineering & Sales Co., Inc. Removable temperature measuring device
DE102005040699B3 (de) 2005-08-25 2007-01-11 Labom Meß- und Regeltechnik GmbH Temperaturmessvorrichtung
JP2011027466A (ja) * 2009-07-22 2011-02-10 Daikin Industries Ltd センサ組立体
EP2038625B1 (fr) 2006-07-06 2011-08-10 Epcos Ag Dispositif de mesure de température
US20160047697A1 (en) 2014-08-14 2016-02-18 Abb Technology Ag Application temperature pickup device for autonomously measuring the temperature of a container
DE102014118206A1 (de) 2014-12-09 2016-06-09 Endress + Hauser Wetzer Gmbh + Co. Kg Temperaturfühler
DE102015113237A1 (de) 2015-08-11 2017-02-16 Endress + Hauser Wetzer Gmbh + Co Kg Temperaturmessgerät zur Messung der Temperatur eines in einem Behälter befindlichen Mediums
DE102017100267A1 (de) 2017-01-09 2018-07-12 Endress + Hauser Wetzer Gmbh + Co. Kg Thermometer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431291B4 (de) * 1994-09-02 2004-03-25 Alstom Hochtemperatursonde
US8235592B2 (en) * 2009-10-07 2012-08-07 Wika Alexander Wiegand Se & Co. Kg Gauge on a pipe section
CN105300424A (zh) * 2014-07-28 2016-02-03 德国威卡Aw股份两合公司 用于测量物理变量的适配器
DE102016125403A1 (de) * 2016-12-22 2018-06-28 Endress + Hauser Wetzer Gmbh + Co Kg Temperatursensor
DE102017207006A1 (de) * 2017-04-26 2018-10-31 Siemens Aktiengesellschaft Temperaturfühler, Dampfkraftwerk und Verwendung eines Temperaturfühlers

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0327252A2 (fr) * 1988-02-05 1989-08-09 Philip F. Finney Fixation d'un détecteur de température à résistance
US5382093A (en) 1993-02-22 1995-01-17 Gay Engineering & Sales Co., Inc. Removable temperature measuring device
DE102005040699B3 (de) 2005-08-25 2007-01-11 Labom Meß- und Regeltechnik GmbH Temperaturmessvorrichtung
EP2038625B1 (fr) 2006-07-06 2011-08-10 Epcos Ag Dispositif de mesure de température
JP2011027466A (ja) * 2009-07-22 2011-02-10 Daikin Industries Ltd センサ組立体
US20160047697A1 (en) 2014-08-14 2016-02-18 Abb Technology Ag Application temperature pickup device for autonomously measuring the temperature of a container
DE102014118206A1 (de) 2014-12-09 2016-06-09 Endress + Hauser Wetzer Gmbh + Co. Kg Temperaturfühler
EP3230704B1 (fr) 2014-12-09 2019-04-03 Endress+Hauser Wetzer GmbH+CO. KG Sonde de temperature
DE102015113237A1 (de) 2015-08-11 2017-02-16 Endress + Hauser Wetzer Gmbh + Co Kg Temperaturmessgerät zur Messung der Temperatur eines in einem Behälter befindlichen Mediums
DE102017100267A1 (de) 2017-01-09 2018-07-12 Endress + Hauser Wetzer Gmbh + Co. Kg Thermometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114406431A (zh) * 2022-03-15 2022-04-29 中国原子能科学研究院 电子束焊接温度的监测系统

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