EP3338070A1 - Appareil de mesure de température avec une détermination de température de comparaison - Google Patents

Appareil de mesure de température avec une détermination de température de comparaison

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Publication number
EP3338070A1
EP3338070A1 EP16744721.8A EP16744721A EP3338070A1 EP 3338070 A1 EP3338070 A1 EP 3338070A1 EP 16744721 A EP16744721 A EP 16744721A EP 3338070 A1 EP3338070 A1 EP 3338070A1
Authority
EP
European Patent Office
Prior art keywords
temperature
thermocouple
terminal
measuring
reference temperature
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Withdrawn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
EP16744721.8A
Other languages
German (de)
English (en)
Inventor
Thomas Härle
Björn WALSER
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.)
Endress and Hauser Wetzer GmbH and Co KG
Original Assignee
Endress and Hauser Wetzer GmbH and 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 and Hauser Wetzer GmbH and Co KG filed Critical Endress and Hauser Wetzer GmbH and Co KG
Publication of EP3338070A1 publication Critical patent/EP3338070A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/023—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples provided with specially adapted connectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/10—Arrangements for compensating for auxiliary variables, e.g. length of lead
    • G01K7/12—Arrangements with respect to the cold junction, e.g. preventing influence of temperature of surrounding air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/10—Arrangements for compensating for auxiliary variables, e.g. length of lead
    • G01K7/12—Arrangements with respect to the cold junction, e.g. preventing influence of temperature of surrounding air
    • G01K7/13—Circuits for cold-junction compensation

Definitions

  • the invention relates to a measuring device for determining a measuring temperature at a measuring point by means of a thermocouple and a temperature measuring device for determining a measuring temperature at a measuring point. Furthermore, the invention relates to a method for determining a measuring temperature at a measuring point.
  • field devices are often used which serve to detect and / or influence process variables.
  • Examples of such field devices are level gauges, mass flowmeters, pressure and temperature measuring devices, etc., which detect the corresponding process variables level, flow, pressure or temperature as sensors.
  • thermocouples used.
  • a thermocouple provides a measurement voltage that can be used to determine the temperature difference that occurs along the thermocouple.
  • the reference temperature at the terminals of the thermocouple must be determined
  • Thermocouple be known as accurately as possible. The more accurately the reference temperature is known, the more accurate the measurement temperature can be determined.
  • a measuring device for determining a measuring temperature at a measuring point by means of a first thermocouple comprises a first terminal and a second terminal for connecting the first thermocouple, a first connecting line and a second connecting line, the first and the second terminal each with a Connect the transmitter, a reference temperature sensor, which is located outside the terminals and to do so is designed to detect a reference temperature at the location of the reference temperature sensor, and the evaluation, which is designed to determine the measurement temperature at the measuring point.
  • an additional connecting line is connected to the second connecting line, which consists of a different material than the second connecting line.
  • the additional connecting line forms, together with the second connecting line, a second thermocouple, which is also connected to the
  • the second thermocouple provides a second measurement voltage that depends on the second temperature difference between the temperature of the second terminal and the reference temperature at the location of the reference temperature sensor.
  • the evaluation electronics are designed to determine the measurement temperature at the measurement point on the basis of a first measurement voltage supplied by the first thermocouple, the second measurement voltage supplied by the second thermocouple and the reference temperature detected by the reference temperature sensor. For the accuracy of a temperature measurement by means of a thermocouple, it is important to compare the reference temperature at the connection points or terminals of the
  • thermocouple To determine thermocouple with the highest possible accuracy.
  • a separate reference temperature sensor is provided in many cases.
  • the reference temperature sensor is usually a bit away from the
  • Terminals arranged so that the reference temperature detected by the reference temperature sensor does not correspond exactly to the temperature of the terminals. So there is a second temperature difference between the reference temperature measured by the reference temperature sensor and the temperature of the terminals. To detect this temperature difference and the prevailing at the terminals
  • thermocouple is used. This second thermocouple is formed by an additional connection with the second connecting line of the second terminal
  • Connecting line is made of a different material than the second connecting line. This second thermocouple detects the second temperature difference between the reference temperature detected by the reference temperature sensor and the
  • Terminals prevailing comparison temperature can be determined with high accuracy. Based on the more accurate than previously known reference temperature can then be determined with high accuracy with the help of the first thermocouple actually interesting measurement temperature.
  • the second thermocouple allows a determination of the temperature within the terminals with very little additional construction costs. It is only necessary to attach an additional connecting line to the second connecting line. The invention is based on the drawing shown in the drawing
  • Fig. 1 shows the principle of a temperature measurement by means of a thermocouple
  • Fig. 2 shows a transfer characteristic for a thermocouple of type K, the am
  • Thermocouple applied measuring voltage as a function of the temperature difference between the measuring point and reference junction shows
  • thermocouple 4 shows a temperature measuring device with a second thermocouple, which allows an accurate determination of the comparison temperature for the first thermocouple.
  • FIG. 5 shows an overview of the different temperatures in the temperature measuring device shown in FIG. 4.
  • thermocouples used.
  • a thermocouple 100 consists of a first conductor 101, which consists of a first metal or a first alloy. This first
  • Conductor 101 extends from a reference junction 102 to a measuring point 103 whose temperature T mess is to be determined.
  • a second conductor 104 extends from the comparison measuring point 102 to the measuring point 103.
  • the second conductor 104 consists of a second metal or a second alloy, which differs from the first metal or the first alloy.
  • the two conductors 101, 104 are made of different materials.
  • the two conductors 101, 104 are electrically connected to one another at a contact point 105. This can be done, for example, by soldering or welding the ends of the two conductors 101, 104.
  • the contact point 105 serves as a measuring probe and assumes the temperature T mess of the measuring point 103. This temperature T mess should by means of
  • Thermocouple 100 can be determined.
  • the opposite to the contact point 105 ends 106, 107 of the two conductors 101, 104 have the temperature T ref , which at the
  • thermocouple 100 The function of the thermocouple 100 is based on the Seebeck effect. As a Seebeck effect, the occurrence of a thermal voltage between two points becomes more different
  • a Seebeck voltage UA forms along the first conductor 101, which consists of the first metal or the first alloy A, which can be expressed in a linear approximation as follows:
  • VSS SSS ⁇ (Tmeas ⁇ T ref) wherein S B denotes the Seebeck coefficient of the second metal or of the second alloy B.
  • the Seebeck voltage U B occurring at the second conductor 104 is
  • the voltage U TC which can be tapped off at the reference junction 102 at the ends 106, 107 thus depends on the one hand on the difference of the Seebeck coefficients SA and S B and on the second on the temperature difference (T mess -T ref ).
  • the Seebeck coefficients also show SA and S B has a certain temperature dependence.
  • thermoelectric voltage The relationship between temperature difference and thermoelectric voltage is therefore not completely linear. Depending on the material pairing, more or less pronounced nonlinearities are present.
  • thermocouple 100 For evaluation, the thermal voltage U tc between the ends 106, 107 of the two conductors 101 and 104 is measured.
  • a voltage measuring device 108 is connected to the two ends 106 and 107 of the thermocouple 100.
  • the comparison temperature T ref of the reference junction 102 may also be known.
  • This comparison temperature T ref of the reference junction 102 is often determined by means of a further temperature sensor, for example by means of a resistance temperature sensor or RTD (Resistance Temperature Device).
  • thermocouple 100 The relationship between the occurring along the thermocouple 100
  • Temperature difference T diff1 (T mess - T ref ) and the associated thermal voltage U tc at the two ends 106, 107 is determined by means of a so-called transfer characteristic
  • Fig. 2 is an example of such a transmission line 200 for a
  • Type K thermocouple shown.
  • the a type K thermocouple the
  • thermocouple 100 Material pairing nickel-chromium / nickel (NiCr-Ni) used.
  • the first conductor 101 of the thermocouple 100 thus consists of nickel-chromium, while the second conductor 104 consists of nickel.
  • Such thermocouples type K can be used in a temperature range of about 0 ° C to about 1 100 ° C. In the diagram shown in Fig. 2 is along the
  • thermocouple temperature difference T diff1 and along the vertical axis of the thermocouple tapped thermoelectric voltage U tc is applied. It can be seen from FIG. 2 that there is essentially a linear relationship between the temperature difference T d i ff i and the associated thermal voltage U tc , where, for example, deviations from the linear one occur at the point 201
  • Context are to be recognized.
  • the transfer characteristic 200 by means of a polynomial 6th, 7th or even higher degree as closely as possible imitated in order in this way, starting from the
  • Thermoelectric voltage U tc to allow the most accurate determination of the temperature difference T d i ff i between the measuring temperature T mess at the measuring point 103 and the reference temperature T re at the reference junction 102.
  • Temperature T re the reference point be known.
  • This comparison temperature T re can, for example, by means of an additional attached to the reference junction 102
  • Temperature sensor can be measured, for example by means of a
  • the thus determined comparison temperature T re can then be converted into a corresponding reference voltage U re f with the aid of the transfer characteristic curve 200 shown in FIG. This is illustrated in FIG. 2 by the arrows 202.
  • the reference voltage U re f thus obtained corresponds to the comparison temperature T re f which prevails at the reference junction 102.
  • the reference voltage U re f is shown in Fig. 2 by the double arrow 203.
  • the procedure is typically that the reference temperature T re f is first converted into a corresponding reference voltage U re f and that the temperature evaluation is attributed to a voltage addition.
  • thermocouples In addition to the type K thermocouple already described, there are a large number of other standardized thermocouples, which are usually referred to as capital letters. From these types of thermocouples, the user can select the most suitable thermocouple for the particular application. The following are for the most common types of thermocouples listed the respective material pairings and the associated temperature ranges:
  • Type K nickel-chromium / nickel (NiCr-Ni), temperature range 0-1 100 ° C;
  • Type J iron / copper-nickel (Fe-CuNi), temperature range 0-750 ° C;
  • Type N nickel-chromium-silicon / nickel-silicon (NiCrSi-NiSi), temperature range 0-100 ° C;
  • Type R platinum 13 rhenium / platinum (Pt13Rh-Pt), temperature range 0-1600 ° C;
  • Type S platinum 10 rhenium / platinum (Pt1 ORh-Pt), temperature range 0-1600 ° C;
  • Type T copper / copper-nickel (Cu-CuNi), temperature range -185 to + 300 ° C;
  • Type E nickel-chromium / copper-nickel (NiCr-CuNi), temperature range 0-800 ° C;
  • thermocouples This list is not exhaustive, there are a variety of other thermocouples.
  • thermocouple In temperature measuring devices, the thermocouple is often connected via a separable connection, for example by means of terminals, with the transmitter. As a result, different thermocouples can be connected to an evaluation depending on the purpose.
  • Fig. 3 is a block diagram of such a temperature measuring device according to the prior art.
  • the temperature measuring device comprises a first connection terminal 300 and a second connection terminal 301, to which a thermocouple 100 can be connected.
  • the first conductor 101 of the thermocouple 100 may be connected to the first
  • Terminal 300 are clamped, and the second conductor 104 can be clamped to the second terminal 301.
  • the first connection terminal 300 is connected via a first connection pin 302 and the second connection terminal 301 is connected to the evaluation electronics 304 via a second connection pin 303.
  • the evaluation electronics 304 comprises a first measuring unit 305, which is designed to evaluate the tapped at the two connection pins 302, 303 thermoelectric voltage U tc .
  • the determined thermal voltage U tc is then supplied to the processing unit 306.
  • thermoelectric voltage U tc also the Comparison temperature T ref required at the reference junction.
  • the interior of the two terminals 300, 301 can be seen here, because there takes place in each case the transition between the respective conductor 101, 104 of the thermocouple 100 and the associated connection pin 302, 303 of the measuring device.
  • the comparison temperature T ref would therefore have to be determined within the two connection terminals 300, 301.
  • the attachment of an additional temperature sensor within the terminals 300, 301 would be costly and thus expensive.
  • a reference temperature sensor 307 is mounted, preferably at a position close to the terminals 300, 301.
  • the reference temperature sensor 307 may be mounted within the housing of the transmitter 304 proximate the terminals 300, 301.
  • the reference temperature sensor 307 may be mounted on a board of the transmitter near the terminals 300, 301.
  • the reference temperature sensor 307 is assigned a second measuring unit 308, which determines the temperature-dependent variable provided by the reference temperature sensor 307
  • the second measuring unit 308 provides this reference temperature T beZ ug the processing unit 306.
  • the reference temperature sensor 307 determines a reference temperature T beZ ug, which differs more or less strongly from the actual reference temperature T ref within the terminals 300, 301. This temperature difference between the measured reference temperature T reference and the actual reference temperature T ref at the location of the terminals 300, 301 enters as an error in the measurement of the measurement temperature T mess .
  • Terminals 300, 301 are influenced by various factors.
  • a role for example, plays the self-heating of the evaluation 304 during operation.
  • that measured by the reference temperature sensor 307 depends on
  • Heat emission from neighboring devices can lead to an additional warming of the
  • the temperature difference T d iff2 between the measured by the reference temperature sensor 307 reference temperature T beZ ug and the prevailing at the location of the terminals 300, 301 comparison temperature can be the thermal coupling between the terminals 300, 301 and the reference temperature sensor 307 T ref up to a few degrees Celsius and thus generate a significant measurement error.
  • the measurement temperature T mess is then also subject to a measurement inaccuracy of a few degrees Celsius, which is unacceptable for many measurements. If one does not want to accept this measurement error caused by the inaccurate determination of the reference temperature T ref , one would have to use the
  • Temperature gauges are available in a variety of different housing designs, such as head transmitters, DIN rail housings or round metal enclosures, also referred to as "field enclosures"
  • Design variant and housing type differs, for example, the thermal coupling to neighboring devices. A computational compensation of the temperature difference between T be ug and T re f is therefore rather unsuccessful.
  • the temperature measuring device shown in Fig. 4 has two terminals 300, 400, to which a thermocouple 100 can be connected.
  • the first conductor 101 of the thermocouple 100 is clamped in the first terminal 300, and the second conductor 104 is clamped in the second terminal 400.
  • Terminal pin 302 and the second terminal pin 303, the two terminals 300, 400 are electrically connected to a transmitter 401. Between the two connection pins 302 and 303 is supplied by the thermocouple 100 thermoelectric voltage Ute, on the temperature difference between the measuring temperature T mess on the
  • Processing unit 402 supplied.
  • the transmitter includes the reference temperature sensor 307, which is configured to determine a reference temperature T beZ ug.
  • the reference temperature sensor 307 is disposed outside the two terminals 300, 400, preferably at a position close to the terminals 300, 400.
  • the reference temperature sensor 307 may be mounted within the housing of the transmitter 401 near the terminals 300, 400, for example.
  • the reference temperature sensor 307 may be mounted within the housing of the transmitter 401 near the terminals 300, 400, for example.
  • the reference temperature sensor 307 may, for example, be a resistance temperature sensor (RTD).
  • the reference temperature sensor 307 is associated with the second measuring unit 308, which provides the information provided by the reference temperature sensor 307
  • Temperature-dependent variable for example, the resistance
  • Reference temperature T eyak converts and this reference temperature of the processing unit 402 provides.
  • the measured reference temperature T Cei more or less differs from that within the terminals
  • T d iff2 (T re f - T beZ ug) between the temperature at the location of the reference temperature sensor 307 and the temperature inside the Terminal is in the solution shown in Fig. 4 in the interior of the second
  • Terminal 400 at the second terminal pin 303 an additional connecting line
  • the additional connection line 403 is electrically connected at a connection point 404 to the second connection pin 303.
  • the material of this additional connection line 403 differs from the material of the second connection pin 303, so that the second connection pin 303 together with the additional connection line 403 acts as a second thermocouple 405. The two materials are at the junction
  • Connecting lead 403 may be soldered or welded to the second terminal pin 303.
  • the additional connection line 403 is preferably in the form of a third
  • the additional connection line 403 and the third connection pin 406 are made of the same material. Since the material of the second connection pin 303 differs from the material of the additional connection line 403 and the third connection pin 406, the second connection pin 303 forms together with the additional connection line 403 and
  • This second thermocouple 405 is configured to measure a temperature difference T d iff2 between the temperature at the location of the reference temperature sensor 307 and the temperature inside the second terminal 400.
  • Terminal 400 and the temperature at the location of the reference temperature sensor 307 are measured accurately.
  • Measuring unit 407 is connected, which is designed to evaluate the tapped between the two connection pins 303, 406 thermo voltage U tC 2 and the processing unit 402 supply. It is important to ensure that the ends of the two connection pins 303 are to be arranged in the immediate vicinity of the reference temperature sensor 307 406 so that the temperature measured by the reference temperature sensor 307 reference temperature T respect exactly the
  • Reference temperature sensor 307 thus the comparison temperature for the second thermocouple
  • the temperature inside the second terminal 400 can be determined by means of the transfer characteristic of the second thermocouple 405. In this way, one obtains the actual reference temperature T re inside the second terminal 400.
  • the temperature T mess at the measuring point is determined on the basis of the thus determined comparison temperature T re f and the voltage applied to the first thermocouple 100 thermoelectric voltage U tc i by means of the transfer characteristic of the first thermocouple 100.
  • thermocouple 405 can be realized without significant additional construction costs. It is only necessary, at the existing second terminal pin 303 an additional thermocouple 405
  • Connecting line 403 to be made of a different material than the second
  • Connection pin 303 exists. This additional connection line 403 is then led out of the second connection terminal 400 by means of a third connection pin 406.
  • This third connection pin 406 may be integrally formed with the additional connection line 403, but the third connection pin 406 may also be formed as a separate connection pin, which is electrically connected to the additional connection line 403.
  • the second thermocouple 405 thus formed is suitable for the required
  • a temperature transmitter can be realized as a so-called head transmitter and installed in a disk-shaped housing of about 4 cm in diameter. With a head transmitter, the terminals are accessible from the outside.
  • the terminals can be formed integrated into the housing.
  • temperature transmitters are offered, which are installed in a DIN rail housing, which is designed for mounting on a DIN rail.
  • the terminals for a thermocouple in the form of a pin tray are formed. Even in such a pin tray can be an additional second
  • Another housing variant for thermotransmitters is a round field housing with a housing diameter of about 10 cm, which is often designed as a two-part explosion-proof housing. In this type of housing, a separate connection space is provided, in which the terminals are arranged. In all the housing variants mentioned, the connection terminals can be modified such that the required second thermocouple 405 is formed in the connection terminal.
  • thermocouple results.
  • thermocouple results.
  • connection pins 302, 303 may be made of copper, for example.
  • a second material is needed, which forms a suitable thermocouple together with copper, for example, here Konstantan in question.
  • a thermocouple of type T copper / copper-nickel
  • a second thermocouple 405 z. B.
  • thermocouple type J iron / copper-nickel
  • type K nickel-chromium / nickel
  • type E nickel-chromium / copper-nickel
  • thermocouples 100 with different material pairings can be connected to the connection terminals 300, 400 of the temperature measuring device shown in FIG. 4. In general, therefore, it can be assumed that the material pairing of the first thermocouple 100 does not match the material pairing of the second thermocouple 405. Therefore, the
  • thermoelectric voltage U tc Translation of the voltage applied to the first thermocouple 100 thermoelectric voltage U tc in a corresponding first temperature difference T d i ff i requires a first transfer characteristic that fits the material pairing of the first thermocouple 100.
  • a first transfer characteristic that fits the material pairing of the first thermocouple 100.
  • Transfer characteristic that matches the material pairing of the second thermocouple 405 is needed. For each of the two thermocouples 100, 405, a separate transfer characteristic is therefore generally required in each case. In this case, the same transfer characteristic is always used for the second thermocouple 405.
  • FIG. 5 shows the reference temperature T.sub.zug , which is at the location of the reference temperature sensor 307 outside of
  • Terminals 300, 400 is determined by the reference temperature sensor 307.
  • the comparison temperature T re f is shown, which prevails within the connection terminals 300, 400 and which serves as a comparison temperature for the first thermocouple 100.
  • the measurement temperature T mess at the tip of the first thermocouple 100 is located, which is to be determined by means of the temperature measurement.
  • the first temperature difference T d T IFFI measured - T re f inscribes detected by the first thermocouple element 100.
  • the second temperature difference T diff2 T re -T Zzug is drawn, which is detected by means of the second thermocouple 405.
  • the determination of the measurement temperature T mess can be carried out, for example, as follows:
  • the reference temperature T beZg supplied from the reference temperature sensor 307 is converted into an associated reference voltage U be train by means of the transfer characteristic associated with the second thermocouple 405.
  • the measuring voltage U tC 2 supplied to the second thermocouple 405 is then added to this reference voltage U beZ .
  • the summed voltage U beZ ⁇ g + U tC 2 thus obtained is translated into a temperature by means of the transfer characteristic associated with the second thermocouple 405, and as a result, the comparison temperature T ref is obtained .
  • the measuring voltage U tC 2 supplied by the second thermocouple 405 it is thus possible to determine the reference temperature T re f very accurately from the reference temperature T reference .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

L'invention concerne un dispositif de mesure servant à déterminer une température de mesure sur un point de mesure au moyen d'un premier thermocouple. Le dispositif de mesure comprend un première borne de raccordement et une deuxième borne de raccordement servant au raccordement du premier thermocouple, une première ligne de connexion et une deuxième ligne de connexion, qui relient la première et la deuxième borne de raccordement respectivement à un système électronique d'analyse, un capteur de température de référence, qui est disposé à l'extérieur des bornes de raccordement et qui est configuré pour détecter une température de référence à l'emplacement du capteur de température de référence, le système électronique d'analyse étant configuré pour déterminer la température de mesure sur le point de mesure. Une ligne de connexion supplémentaire constituée d'un matériau différent de celui de la deuxième ligne de connexion est reliée, dans la deuxième borne de raccordement, à la deuxième ligne de connexion. La ligne de connexion supplémentaire forme, conjointement avec la deuxième ligne de connexion, un deuxième thermocouple, qui est également raccordé au système électronique d'analyse. Le deuxième thermocouple fournit une deuxième tension de mesure, qui dépend de la deuxième différence de température entre la température de la deuxième borne de raccordement et la température de référence à l'emplacement du capteur de température de référence. Le système électronique d'analyse est configuré pour déterminer, sur le point de mesure, la température de mesure en partant d'une première tension de mesure fournie par le premier thermocouple, de la deuxième tension de mesure fournie par le deuxième thermocouple et de la température de référence détectée par le capteur de température de référence.
EP16744721.8A 2015-08-20 2016-07-26 Appareil de mesure de température avec une détermination de température de comparaison Withdrawn EP3338070A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015113842.5A DE102015113842A1 (de) 2015-08-20 2015-08-20 Temperaturmessgerät mit Vergleichstemperaturbestimmung
PCT/EP2016/067741 WO2017029080A1 (fr) 2015-08-20 2016-07-26 Appareil de mesure de température avec une détermination de température de comparaison

Publications (1)

Publication Number Publication Date
EP3338070A1 true EP3338070A1 (fr) 2018-06-27

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EP16744721.8A Withdrawn EP3338070A1 (fr) 2015-08-20 2016-07-26 Appareil de mesure de température avec une détermination de température de comparaison

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US (1) US20180238744A1 (fr)
EP (1) EP3338070A1 (fr)
CN (1) CN108027285A (fr)
DE (1) DE102015113842A1 (fr)
WO (1) WO2017029080A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017206094A1 (de) * 2017-04-10 2018-10-11 BSH Hausgeräte GmbH Gerät mit einer temperaturüberwachten Steckverbindung
GB2562506A (en) * 2017-05-17 2018-11-21 Continental Automotive Gmbh Thermocouple arrangement and method for measuring
GB2562505A (en) * 2017-05-17 2018-11-21 Continental Automotive Gmbh Thermocouple arrangement and method for measuring temperatures
WO2019063519A1 (fr) 2017-09-27 2019-04-04 Abb Schweiz Ag Dispositif de mesure de température et procédé de détermination de température
CN108801488A (zh) * 2018-04-11 2018-11-13 北京强度环境研究所 一种热电偶测温冷端补偿系统
DE102018116309A1 (de) * 2018-07-05 2020-01-09 Endress + Hauser Wetzer Gmbh + Co. Kg Thermometer mit Diagnosefunktion
US11815408B2 (en) * 2019-02-11 2023-11-14 Wika Alexander Wiegand Se & Co. Kg Temperature sensing device
CN112242481A (zh) * 2020-09-23 2021-01-19 浙江先导热电科技股份有限公司 一种设有测温功能的台阶式热电模块及基板测温方法
CN113267265B (zh) * 2021-05-21 2024-08-09 中国联合重型燃气轮机技术有限公司 燃气轮机的燃气温度测量系统、燃气轮机和温度测量方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2519758C2 (de) * 1975-05-02 1976-04-28 Siemens Ag Einrichtung zur temperatur-fernmessung
US5161893A (en) * 1987-10-13 1992-11-10 Respiratory Support Products, Inc. Temperature measurement
US4936690A (en) * 1989-05-31 1990-06-26 Rosemount Inc. Thermocouple transmitter with cold junction compensation
CN2063635U (zh) * 1989-06-10 1990-10-10 南京航空附件厂 热电偶冷端精密补偿器
CN1081251A (zh) * 1993-05-15 1994-01-26 李臻 普通三线制热偶测温系统
DE4430722C2 (de) * 1994-08-30 1998-04-09 Daimler Benz Ag Schaltung zur Übergangsstellenkompensation
US6068400A (en) * 1998-02-27 2000-05-30 Tektronix, Inc. Temperature compensated adapter for a DMM
JP3829637B2 (ja) * 2001-03-27 2006-10-04 株式会社山武 測温装置
JP4278096B2 (ja) * 2004-02-17 2009-06-10 株式会社山武 温度補償装置
US7044638B2 (en) * 2004-05-24 2006-05-16 Rosemount Aerospace, Inc. Multi-element thermocouple
US7234864B2 (en) * 2004-09-30 2007-06-26 Rockwell Automation Technologies, Inc. Measurement of multi-channel cold junction temperature
US8118484B2 (en) * 2009-03-31 2012-02-21 Rosemount Inc. Thermocouple temperature sensor with connection detection circuitry
DE102009060893B4 (de) * 2009-12-30 2013-07-18 Temperaturmeßtechnik Geraberg GmbH Messumformer zur Signalwandlung thermoelektrischer Messgrößen
US8485724B2 (en) * 2010-03-31 2013-07-16 Microchip Technology Incorporated Thermocouple electromotive force voltage to temperature converter with integrated cold-junction compensation and linearization
US20120065923A1 (en) * 2010-09-14 2012-03-15 General Electric Company Integrated cold junction compensation circuit for thermocouple connections
DE102010052478B4 (de) * 2010-11-26 2013-09-19 Phoenix Contact Gmbh & Co. Kg Elektrischer Streckenverbinder für Thermoelemente und Verfahren zu dessen Herstellung
SG182879A1 (en) * 2011-02-01 2012-08-30 Rockwell Automation Asia Pacific Business Ctr Pte Ltd I/o module with multi-dimensional cold junction compensation
DE102012003614B3 (de) * 2012-02-23 2013-05-29 Testo Ag Temperaturmessgerät, Temperaturmessgerät-Set und Verfahren zur Konfiguration eines mit einem Thermoelement betreibbaren Temperaturmessgeräts
DE102013109809A1 (de) * 2013-09-09 2015-03-12 Endress + Hauser Wetzer Gmbh + Co. Kg Verfahren zur Bestimmung der Vergleichsstellentemperatur eines Thermoelements

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WO2017029080A1 (fr) 2017-02-23
DE102015113842A1 (de) 2017-02-23
US20180238744A1 (en) 2018-08-23

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