WO2009146966A1 - Capteur de température - Google Patents

Capteur de température Download PDF

Info

Publication number
WO2009146966A1
WO2009146966A1 PCT/EP2009/054130 EP2009054130W WO2009146966A1 WO 2009146966 A1 WO2009146966 A1 WO 2009146966A1 EP 2009054130 W EP2009054130 W EP 2009054130W WO 2009146966 A1 WO2009146966 A1 WO 2009146966A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature sensor
thermistor element
sensor according
fixing arrangement
protective tube
Prior art date
Application number
PCT/EP2009/054130
Other languages
German (de)
English (en)
Inventor
Arne Roesch
Thomas Loibl
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009146966A1 publication Critical patent/WO2009146966A1/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
    • G01K1/08—Protective devices, e.g. casings
    • 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
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor

Definitions

  • the invention is based on a temperature sensor according to the preamble of independent claim 1.
  • Such a temperature sensor is known for example from DE 102 33 880 B3 and has a carrier element with a recess in which a thermistor element is held.
  • a ceramic fleece for vibration damping and for thermal connection of the thermistor element is a ceramic fleece, which is located between the carrier element and the housing of the temperature sensor.
  • Thermistor element is dependent on the mounting position of the temperature sensor and that a stable mounting of the thermistor element is not guaranteed, especially if the elasticity of the ceramic non-woven decreases due to aging processes.
  • the temperature sensor according to the invention with the characterizing features of independent claim 1 has the advantage that the heat input to the thermistor element is not dependent on the mounting position of the temperature sensor and that a stable mounting of the thermistor element also over the life of
  • the temperature sensor comprises a fixing arrangement and a protective tube, wherein the thermistor is fixed by the fixing in the protective tube and wherein the fixing arrangement consists of at least two mold parts, between which a cavity is formed, which accommodates the thermistor element at least partially.
  • the term "molded parts" is to be understood as meaning parts which retain a shape imprinted on them in a self-supporting manner.
  • the at least two molded parts made of the same material, so that they have the same thermal properties, in particular thermal conductivity and thermal expansion, whereby mechanical stresses can be largely avoided even with temperature changes.
  • the molded parts have the same shape, since in this way only one molding part has to be handled during assembly of the temperature sensor.
  • shape and material are not to be construed narrowly in the context of this invention, but to be understood in the sense that two moldings are considered equal in shape and material, even if within the tolerance specified for this property
  • shape and material to two moldings also apply if they are manufactured with the same production parameters, in particular in the same batch if they perform the same function, that is, if one of the two moldings can be used in place of the other of the two moldings and the function of the temperature sensor remains unimpaired.
  • the fixing arrangement For mechanical fixation and for thermal coupling of the thermistor element, it is advantageous for the fixing arrangement to receive the thermistor element in a form-locking and / or force-locking manner and / or with a small gap. Particularly advantageously be the occurring between the thermistor element, moldings and protective tube
  • the thermistor element prefferably attached to the fixing arrangement that the thermistor element in the fixing arrangement by a filler, in particular by a ceramic adhesive or a high temperature resistant glass, is fixed.
  • a composite material may be advantageously used for this purpose.
  • the protective tube it is advantageous for the protective tube to be shrunk onto the fixing arrangement, since in this way a stable connection between the protective tube and the fixing arrangement can be produced with little effort.
  • the magnetic forming method may be used for this purpose.
  • FIG. 1 shows a detail of FIG. 1 enlarged and detailed.
  • FIGS. 1, Ia and 2 show a temperature sensor 10 according to the invention.
  • the temperature sensor 10 comprises a thermistor element 21, a fixing arrangement 22 and a protective tube 23.
  • the fixing arrangement 22 is located inside the protective tube 23 and serves for fixing and protecting the thermistor element 21.
  • the fixing assembly 22 consists of two identical with respect to shape and material mold parts 221, 222.
  • the mold parts 221, 222 are made of aluminum oxide and have the outer contour of half cylinders, each with a rounded face, the diameter of these half-cylinder 3 mm and the height of these half-cylinder 6 mm is.
  • the mold parts 221, 222 are shaped and arranged such that a cavity 223 is formed between them, which partially accommodates the thermistor element 21.
  • the construction of the thermistor element 21 is shown in FIG. 1a.
  • the thermistor element 21 has a resistance part 211 which contains a semiconductor material, for example Fe 2 O 3 , ZnTiO 4 or MgCr 2 O 4 .
  • the resistance part 211 defines the temperature Resistance characteristic of the thermistor element 21.
  • the resistance part 211 is contacted by two leads 213a, 213b.
  • a sheath 212 surrounds and protects the resistive portion 211 and portions of the leads 213a, 213b.
  • the enclosure 212 is made of glass or other thermally and mechanically resistant material.
  • the enclosure 212 and parts of the leads 213a, 213b of the thermistor element 21 are received by the cavity 223 positive and non-positive.
  • the fixing arrangement 22 it is also possible for the fixing arrangement 22 to consist of more than 2 shaped parts 221, 222, for example of 3, 4 or more shaped parts. As an alternative to the exemplary embodiment, it is also possible that the molded parts 221, 222 are at least partially not identical in terms of shape and material.
  • the mold parts 221, 222 may also have a different shape than in the embodiment and consist of a different material, in particular of another high-temperature resistant and mechanically stable gas-tight ceramic.
  • examples of such ceramics are Al 2 O 3 , AITiO, ZrO 2 , AlN, SiC and Si 3 N 4 .
  • the mold parts 221, 222 may also consist of a ceramic containing a plurality of said substances, in particular of ZTA (zirconia-reinforced alumina) or of ATZ (zirconia reinforced with alumina).
  • a filler in particular of ceramic or a high-temperature-resistant glass, between the fixing element 22 and the thermistor element 21.
  • the purpose of this filler is to fill remaining gaps and to further improve the thermal contact between the fixing element 22 and the thermistor element 21.
  • the mold parts 221, 222 are produced, for example, in an injection molding process, for example by CIM (Ceramic Injection Molding), wherein the temperature of the ceramic during injection molding is between 100 0 C and 200 0 C.
  • CIM Chemical Injection Molding
  • the assembly of the protective tube 23, which consists for example of steel, can be done, for example, that the protective tube 23 is heated and pushed over the composite of the thermistor element 21 and fixing assembly 22. At the next Cooling of the protective tube 23, there is a shrinkage of the protective tube 23 and thus to a compression between the protective tube 23 and the composite of thermistor 21 and fixing 22nd
  • the shrinkage of the protective tube 23 is not through

Landscapes

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

Abstract

L'invention porte sur un capteur de température comprenant un élément de thermistance (21), un dispositif de fixation (22) et un tube de protection (23), l'élément de thermistance (21) étant fixé dans le tube de protection (23) par le dispositif de fixation (22), caractérisé en ce que le dispositif de fixation est constitué d'au moins deux pièces préformées (221, 222), entre lesquelles est aménagée une cavité (223), qui au moins partiellement loge l'élément de thermistance (21).
PCT/EP2009/054130 2008-06-03 2009-04-07 Capteur de température WO2009146966A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810002191 DE102008002191A1 (de) 2008-06-03 2008-06-03 Temperatursensor
DE102008002191.1 2008-06-03

Publications (1)

Publication Number Publication Date
WO2009146966A1 true WO2009146966A1 (fr) 2009-12-10

Family

ID=40909916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/054130 WO2009146966A1 (fr) 2008-06-03 2009-04-07 Capteur de température

Country Status (2)

Country Link
DE (1) DE102008002191A1 (fr)
WO (1) WO2009146966A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012110822A1 (de) 2012-11-12 2014-05-15 Epcos Ag Temperatursensorsystem und Verfahren zur Herstellung eines Temperatursensorsystems
DE102012110845A1 (de) 2012-11-12 2014-05-15 Epcos Ag Temperaturfühler und Verfahren zur Herstellung eines Temperaturfühlers
DE102019110312A1 (de) 2019-04-18 2020-10-22 Endress+Hauser Flowtec Ag Verfahren zur Herstellung einer Sonde eines thermischen Durchflussmessgeräts, Sonde eines thermischen Durchflussmessgeräts und thermisches Durchflussmessgerät
DE102021116345A1 (de) 2021-06-24 2022-12-29 Schott Ag Einheit für Hochtemperaturanwendungen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054057A (en) * 1976-03-01 1977-10-18 Diatek, Inc. Temperature sensing probe and disposable cover therefor
FR2645959A1 (fr) * 1987-12-24 1990-10-19 Kawaso Electric Ind Co Appareil pour mesurer en continu la temperature de metal fondu et son procede de fabrication
EP1785705A1 (fr) * 2005-11-10 2007-05-16 Sc2N Capteur de temperature

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233880B3 (de) 2002-07-25 2004-03-04 Beru Ag Temperatursensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054057A (en) * 1976-03-01 1977-10-18 Diatek, Inc. Temperature sensing probe and disposable cover therefor
FR2645959A1 (fr) * 1987-12-24 1990-10-19 Kawaso Electric Ind Co Appareil pour mesurer en continu la temperature de metal fondu et son procede de fabrication
EP1785705A1 (fr) * 2005-11-10 2007-05-16 Sc2N Capteur de temperature

Also Published As

Publication number Publication date
DE102008002191A1 (de) 2009-12-10

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