WO2009146447A1 - High vibration thin film rtd sensor - Google Patents
High vibration thin film rtd sensor Download PDFInfo
- Publication number
- WO2009146447A1 WO2009146447A1 PCT/US2009/045836 US2009045836W WO2009146447A1 WO 2009146447 A1 WO2009146447 A1 WO 2009146447A1 US 2009045836 W US2009045836 W US 2009045836W WO 2009146447 A1 WO2009146447 A1 WO 2009146447A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature sensor
- rtd
- ceramic adhesive
- adhesive
- sheath
- Prior art date
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
- 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
- G01K13/024—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving gases
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
- G01K2205/04—Application of thermometers in motors, e.g. of a vehicle for measuring exhaust gas temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49082—Resistor making
- Y10T29/49085—Thermally variable
Definitions
- the present invention relates to temperature sensors, and in particular to a temperature sensor capable of operating in high vibration environments with improved accuracy and a high temperature range.
- the temperature of a process fluid in an industrial process is typically measured by a temperature sensor or probe that is positioned in the fluid.
- the temperature sensor may use a thermocouple or a resistance temperature detector (RTD) to produce an electrical signal that is a function of temperature.
- RTD resistance temperature detector
- a thermocouple makes use of two dissimilar metals with different Seebeck coefficients.
- the thermocouple generates a voltage based upon a temperature difference between the thermocouple junction and a reference junction.
- the thermocouple offers a wide temperature operating range (typically from 0°C to 1450°C), and does not require a power source to generate an output signal.
- Thermocouples also are capable of operating in high vibration environments. However, thermocouples are less accurate than RTD devices.
- a resistance temperature detector senses temperature by a change in electrical resistance of a metal. The higher the temperature of the RTD, the higher the resistance.
- An output signal of the RTD sensor is generated by passing a constant electrical current through the RTD and measuring the voltage produced.
- An RTD may be either a wire wound or a thin film device.
- the RTD may be encapsulated in a temperature probe and used in conjunction with an industrial process transmitter to generate a transmitter output representing the temperature of the fluid in contact with the probe.
- Platinum is commonly used in wire wound and thin film RTDs, and provides stable and accurate measurement of temperatures up to about 600°C to 65O 0 C.
- RTD devices When compared to thermocouples, RTD devices are capable of higher accuracy but have smaller overall temperature range. Also, RTD devices are more susceptible to damage or failure in high vibration environments than are thermocouples. There is a need for a temperature sensor capable of operation in high vibration environments with the accuracy of an RTD and with a better high temperature range than is currently available with RTDs designed for high vibration environments.
- a temperature sensor includes a sensor sheath mounted at a distal end of a cable carrying electrical leads.
- An RTD sensing element positioned within the sheath is connected to leads from the cable.
- a ceramic thermal adhesive holds the RTD sensing element in place within the sheath.
- FIG. 1 is a cross-sectional view of a distal portion of the RTD temperature sensor of the present invention.
- FIG. 1 is a cross-sectional view of a distal portion of RTD temperature sensor 10, which is capable of operating in high vibration environments, which provides improved high temperature performance.
- RTD sensor 10 includes mineral insulator (MI) cable 12, sheath 14, and RTD sensing element 16.
- MI mineral insulator
- MI cable 12 extends from the proximal end (not shown) of RTD sensor 10 to sheath 14 at the distal end of RTD sensor 10.
- MI cable 12 includes outer tube 20, electrical leads 22a, 22b, 22c, and 22d, and a filling of a mineral insulator powder.
- outer tube 20 is a metallic tube made of 321 stainless steel, leads 22a-
- mineral insulator filler 24 is magnesium oxide (MgO) powder.
- Sheath 14 includes extension tube 30 and end cap 32. Distal end of extension tube 30 is welded to the distal end of tube 20. End cap 32 is welded to the distal end of extension tube 30 to close the distal end of sheath 14. In one embodiment, both extension tube 30 and end cap 32 are 316 stainless steel. In other embodiments, extension tube 30 may be formed of 316L, 321, or 316Ti stainless steel.
- RTD sensing element 16 is positioned within sheath 14 near end cap 32. Leads 34a and 34b of RTD sensing element 16 extend in a proximal direction to make connection with leads 22a- 22d of cable 12. Lead 34a of RTD sensing element 16 is connected to the distal ends of leads 22a and 22b by laser weld 36a. Lead 34b of RTD sensing element 16 is connected to the distal ends of cable leads 22c and 22d by laser weld 36b.
- RTD sensing element 16 is a thin film RTD device, such as the HD-421 sensing element manufactured by Heraeus Sensor GmbH. In that embodiment, lead 34a and 34b are platinum leads. In other embodiments, wire wound
- RTD sensing elements may be used.
- ceramic adhesive filler 38 is a two-component thermoepoxy Thermoguss 2000, which provides stable temperature performance up to about 450 0 C.
- ceramic adhesive filler 38 is Cerastil V336, a two-component ceramic adhesive, which provides stable operation up to about 600 0 C.
- Ceramic adhesive filler 38 must provide electrical insulation, stable characteristics up to the desired maximum temperature, and must prevent relative movement of RTD sensing element 16 and sheath 14. Ceramic adhesive filler 38 prevents relative movement by forming a rigid mass within sheath 14, so that RTD sensing element 16 cannot move relative to capsule 14 during vibration of RTD sensor
- the vibrational load on sensor 10 can exceed an acceleration of 100m/s at frequencies in range of 10Hz to 500Hz. In some cases, the acceleration can be up to 600m/s over the frequency range of 10Hz to 500Hz.
- Cerastil V336 offers a higher operating range (up to 600 0 C), but does not have as high a thermal conductivity as Thermoguss 2000. It is possible, however, to achieve enhanced temperature range and response times by using a combination of Cerastil V336 and
- Thermoguss 2000 In one embodiment, approximately two thirds of the interior of sheath 14 is filled with Cerastil V336, and one third of sheath 14 is filled with Thermoguss 2000. In that embodiment, the portion filled by Thermoguss 2000 is at the distal end, nearest RTD sensing element 16. Other combinations of layers of ceramic adhesives are also possible.
- RTD sensor 10 is fabricated by laser welding leads 34a and 34b to leads 22a-22d that extend from the distal end of MI cable 12. Extension tube 30 is then placed over leads 22a-22d, leads 34a, 34b, and RTD sensing element 16 so that the proximal end of extension tube 30 abuts the distal end of tube 20 of cable 12. A laser welded butt joint is then formed between tube 20 and extension tube 30.
- Ceramic adhesive filler 38 is then introduced into the interior of sheath 14 as defined by extension tube 30. End cap 32 has not yet been joined to extension tube 30, so that ceramic adhesive filler 38 can be introduced through the distal opening of sheath
- Ceramic adhesive filler 38 may be allowed to cure and harden before end cap 32 is inserted into the distal opening and welded to extension tube 30.
- RTD sensors in which the entire capsule was filled with Thermoguss 2000 also provided satisfactory operation in vibrational loads of acceleration up to 600m/s in a range of frequency from 10Hz to 500Hz.
- the RTD sensors in which Thermoguss 2000 filled the entire capsule provided satisfactory stable temperature performance up to about
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980119759.9A CN102047087B (en) | 2008-05-30 | 2009-06-01 | High vibration film rtd sensor |
EP09755807.6A EP2291625A4 (en) | 2008-05-30 | 2009-06-01 | High vibration thin film rtd sensor |
JP2011511895A JP5395897B2 (en) | 2008-05-30 | 2009-06-01 | High vibration resistance temperature sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/156,144 | 2008-05-30 | ||
US12/156,144 US7982580B2 (en) | 2008-05-30 | 2008-05-30 | High vibration thin film RTD sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009146447A1 true WO2009146447A1 (en) | 2009-12-03 |
Family
ID=41377624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/045836 WO2009146447A1 (en) | 2008-05-30 | 2009-06-01 | High vibration thin film rtd sensor |
Country Status (5)
Country | Link |
---|---|
US (1) | US7982580B2 (en) |
EP (1) | EP2291625A4 (en) |
JP (1) | JP5395897B2 (en) |
CN (1) | CN102047087B (en) |
WO (1) | WO2009146447A1 (en) |
Cited By (4)
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WO2012004117A1 (en) | 2010-07-08 | 2012-01-12 | Endress+Hauser Flowtec Ag | Sensor of a thermal flowmeter for determining the flow of a medium through a measuring tube and method for producing the same |
FR3016695A1 (en) * | 2014-01-21 | 2015-07-24 | Okazaki Mfg Company | TEMPERATURE SENSOR FOR HIGH TEMPERATURE |
EP3772638A1 (en) | 2019-08-08 | 2021-02-10 | Ztove ApS | Thermal sensor wire and method of assembling the same |
EP3822596A1 (en) * | 2019-11-13 | 2021-05-19 | HIDRIA d.o.o. | Method for manufacturing a sensing tip for a temperature sensing device, temperature sensing device, combustion engine and vehicle comprising the same |
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US7997795B2 (en) * | 2006-05-02 | 2011-08-16 | Watlow Electric Manufacturing Company | Temperature sensors and methods of manufacture thereof |
US8303173B2 (en) * | 2007-10-29 | 2012-11-06 | Smiths Medical Asd, Inc. | Dual potting temperature probe |
DE102008015359A1 (en) * | 2008-03-20 | 2009-09-24 | Endress + Hauser Flowtec Ag | Temperature sensor and method for its production |
US8118486B2 (en) * | 2008-09-04 | 2012-02-21 | AGlobal Tech, LLC | Very high speed temperature probe |
US8118485B2 (en) * | 2008-09-04 | 2012-02-21 | AGlobal Tech, LLC | Very high speed thin film RTD sandwich |
JP4541436B2 (en) * | 2008-11-27 | 2010-09-08 | 日本特殊陶業株式会社 | Temperature sensor |
US20110026562A1 (en) * | 2009-07-31 | 2011-02-03 | Rtd Company | Temperature sensor using thin film resistance temperature detector |
DE102010031917B3 (en) * | 2010-07-22 | 2012-02-02 | Borgwarner Beru Systems Gmbh | temperature sensor |
US8828570B2 (en) | 2011-06-29 | 2014-09-09 | Hewlett-Packard Development Company, L.P. | Battery temperature sensor |
WO2013173301A1 (en) * | 2012-05-14 | 2013-11-21 | Thermo King Corporation | Temperature probe for transport refrigeration |
EP2895830A2 (en) * | 2012-09-17 | 2015-07-22 | Tesona GmbH & Co. KG | Method for pressing or welding the protective cover of a high temperature sensor |
WO2014041166A2 (en) * | 2012-09-17 | 2014-03-20 | Tesona Gmbh & Co.Kg | High temperature sensor and method for producing a protective cover for a high temperature sensor |
EP2895829B1 (en) | 2012-09-17 | 2016-05-18 | Tesona GmbH & Co. KG | High temperature sensor with a crimped protective tube |
US20150192443A1 (en) * | 2012-09-21 | 2015-07-09 | Sierra Instruments, Inc. | Wire-wound sensor componentry for mass flow meters |
US20150192444A1 (en) * | 2012-09-21 | 2015-07-09 | Sierra Instruments, Inc. | Single-probe mass flow meters |
US9188490B2 (en) * | 2013-03-12 | 2015-11-17 | Rosemount Inc. | Thermowell insert |
WO2016009459A1 (en) * | 2014-07-14 | 2016-01-21 | 三菱電線工業株式会社 | Temperature sensor |
JP6421690B2 (en) * | 2014-07-17 | 2018-11-14 | 株式会社デンソー | Temperature sensor |
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KR101766285B1 (en) | 2016-03-28 | 2017-08-08 | 주식회사 동양센서 | Temperature sensor and method of manufacturing thereof |
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US10317295B2 (en) * | 2016-09-30 | 2019-06-11 | Rosemount Inc. | Heat flux sensor |
DE102017118198A1 (en) | 2016-11-03 | 2018-05-03 | Danfoss A/S | A tubular conduit shield for an exhaust temperature sensor assembly, exhaust temperature sensor assembly, and method of assembling an exhaust temperature sensor assembly |
DE102016125403A1 (en) * | 2016-12-22 | 2018-06-28 | Endress + Hauser Wetzer Gmbh + Co Kg | temperature sensor |
JP6888439B2 (en) | 2017-06-28 | 2021-06-16 | 株式会社デンソー | Temperature sensor |
US10976204B2 (en) | 2018-03-07 | 2021-04-13 | Rosemount Inc. | Heat flux sensor with improved heat transfer |
DE102018111167A1 (en) * | 2018-05-09 | 2019-11-14 | Endress + Hauser Wetzer Gmbh + Co. Kg | Measuring insert with protective tube |
US11073429B2 (en) * | 2018-09-24 | 2021-07-27 | Rosemount Inc. | Non-invasive process fluid temperature indication for high temperature applications |
WO2020067915A1 (en) | 2018-09-28 | 2020-04-02 | Rosemount Inc. | Non-invasive process fluid temperature indication with reduced error |
US20200103293A1 (en) | 2018-09-28 | 2020-04-02 | Rosemount Inc. | Non-invasive process fluid temperature indication |
US11650106B2 (en) | 2020-12-30 | 2023-05-16 | Rosemount Inc. | Temperature probe with improved response time |
US20230096651A1 (en) * | 2021-09-28 | 2023-03-30 | Rosemount Inc. | Temperature probe |
DE102022111698A1 (en) | 2022-05-10 | 2023-11-16 | Danfoss A/S | Temperature sensor and method for producing a temperature sensor |
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2008
- 2008-05-30 US US12/156,144 patent/US7982580B2/en active Active
-
2009
- 2009-06-01 CN CN200980119759.9A patent/CN102047087B/en active Active
- 2009-06-01 WO PCT/US2009/045836 patent/WO2009146447A1/en active Application Filing
- 2009-06-01 JP JP2011511895A patent/JP5395897B2/en active Active
- 2009-06-01 EP EP09755807.6A patent/EP2291625A4/en not_active Ceased
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US5030294A (en) * | 1987-05-20 | 1991-07-09 | Bell-Irh Limited | High-temperature mineral-insulated metal-sheathed cable |
US6059453A (en) * | 1998-04-20 | 2000-05-09 | Rosemount Inc. | Temperature probe with sapphire thermowell |
US20070104247A1 (en) * | 2005-11-09 | 2007-05-10 | Denso Corporation | Temperature sensor |
US20080036569A1 (en) * | 2006-07-21 | 2008-02-14 | Beru Aktiengesellschaft | Temperature sensor for a resistance thermometer, in particular for use in the exhaust gas system of combustion engines |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012004117A1 (en) | 2010-07-08 | 2012-01-12 | Endress+Hauser Flowtec Ag | Sensor of a thermal flowmeter for determining the flow of a medium through a measuring tube and method for producing the same |
DE102010031127A1 (en) | 2010-07-08 | 2012-01-12 | Endress + Hauser Flowtec Ag | Measuring transducer of a thermal flowmeter for determining the flow of a medium through a measuring tube and method for its production |
EP2591318B1 (en) * | 2010-07-08 | 2017-10-25 | Endress+Hauser Flowtec AG | Probe of a thermal flow meter, for measuring the flow through a measuring pipe and method for it's fabrication |
FR3016695A1 (en) * | 2014-01-21 | 2015-07-24 | Okazaki Mfg Company | TEMPERATURE SENSOR FOR HIGH TEMPERATURE |
EP3772638A1 (en) | 2019-08-08 | 2021-02-10 | Ztove ApS | Thermal sensor wire and method of assembling the same |
EP3822596A1 (en) * | 2019-11-13 | 2021-05-19 | HIDRIA d.o.o. | Method for manufacturing a sensing tip for a temperature sensing device, temperature sensing device, combustion engine and vehicle comprising the same |
Also Published As
Publication number | Publication date |
---|---|
US20090296781A1 (en) | 2009-12-03 |
US7982580B2 (en) | 2011-07-19 |
EP2291625A1 (en) | 2011-03-09 |
JP5395897B2 (en) | 2014-01-22 |
JP2011522261A (en) | 2011-07-28 |
CN102047087B (en) | 2015-11-25 |
EP2291625A4 (en) | 2015-07-29 |
CN102047087A (en) | 2011-05-04 |
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