WO2016139257A1 - Capteur de température pyrométrique et procédé de détection pyrométrique - Google Patents

Capteur de température pyrométrique et procédé de détection pyrométrique Download PDF

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Publication number
WO2016139257A1
WO2016139257A1 PCT/EP2016/054445 EP2016054445W WO2016139257A1 WO 2016139257 A1 WO2016139257 A1 WO 2016139257A1 EP 2016054445 W EP2016054445 W EP 2016054445W WO 2016139257 A1 WO2016139257 A1 WO 2016139257A1
Authority
WO
WIPO (PCT)
Prior art keywords
pyrometric
temperature sensor
radiation
signal
sensor according
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.)
Ceased
Application number
PCT/EP2016/054445
Other languages
German (de)
English (en)
Inventor
Michael Willsch
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2016139257A1 publication Critical patent/WO2016139257A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0088—Radiation pyrometry, e.g. infrared or optical thermometry in turbines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0803—Arrangements for time-dependent attenuation of radiation signals
    • G01J5/0804—Shutters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0818—Waveguides
    • G01J5/0821—Optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0868—Means for illuminating a slit or a surface efficiently, e.g. entrance slit of a pyrometer or entrance face of a fiber

Definitions

  • the invention relates to a pyrometric temperature sensor of high bandwidth for determining a lying below 500 ° C temperature of an object and a corresponding measurement method.
  • the pyrometric temperature sensor is designed to determine a temperature of an object below 500 ° C. and comprises a near-infrared photodetector for receiving the heat radiation emitted by the object, a shunt device for controlled interruption of the recording of the radiation with a frequency of at least 1 kHz and control electronics.
  • the control electronics are configured to amplify the current signal of the near-infrared photodetector by a factor of at least 10 11 V / A and to determine the temperature from the difference between a dark signal at through
  • Shutters interrupted transmission of the radiation and a bright signal with opened shutters.
  • a temperature below 500 ° C temperature of an object tion radiation from the object is passed in a near-infrared photo ⁇ detector and converted into an electrical signal by the photodetector. Furthermore, the management of the
  • Radiation interrupted periodically by a shunt device with a frequency of at least 1 kHz.
  • the electrical signal is amplified by a factor of at least 10 11 V / A and the temperature is calculated from the difference between a dark kelsignal interrupted by the shuttle forwarding and a bright signal when open
  • Shutters determined.
  • that a pyrometric Mes ⁇ solution also lower temperatures less than 500 ° C, especially less than 200 ° C, made at a high speed ⁇ light was detected by a near infrared sensor is coupled with a very high electrical amplification of its output signal and the thus also increased significant interference signals with a shuttle, ie a shutter is encountered.
  • the heat radiation can be determined.
  • the near-infrared photodetector can be a photodiode, in particular an InGaAs photodiode. This provides a elekt ⁇ step current as an output signal.
  • an optical waveguide may be present. This allows electronic components to be kept away from the location of the measurement, resulting in highly electromagnetic Improved signal quality.
  • the sensor may include a sensor head with lens configured to introduce a portion of the radiation into the optical fiber.
  • the optical waveguide can be designed as a lens endoscope.
  • the optical waveguide may be a fiber-based optical waveguide, in particular with a core cross-section of at least 0.5 mm, in particular at least 1 mm or 2 mm.
  • the shuttle can be an electronic
  • the shutting device can be designed for the controlled interruption of the recording of the radiation at a frequency of at least 10 kHz, in particular at least 50 kHz or 100 kHz.
  • the reinforcement used may also be at least 10 12 V / A wear ⁇ be.
  • the amplification can be effected for example by a transimpedance amplifier.
  • the sensor may include means for generating a
  • trigger signal from a rotation in the object indicates thereby the flow of a rotation or partial rotation of, for example, a full Läuferum ⁇ rotation in a generator or the passage of sweeping a plurality of turbine blades.
  • an assignment of the signals of the near-infrared photodetector may be made to at least one angular position of the Ma ⁇ machine and signals from the near-infrared photodetector for at least one angular position are averaged over several rotations of the engine. This achieves a higher signal-to-noise ratio.
  • a preferred, but by no means limitative exporting ⁇ approximately example of the invention will now be further explained with reference to Figu ⁇ ren the drawing. The features are shown schematically. It shows
  • 1 shows a generator with a pyrometric temperature sensor.
  • FIG. 1 shows highly schematically a section through a generator 10 according to an embodiment of the OF INVENTION ⁇ dung.
  • the generator 10 comprises an outer stator 11 and an inner rotor 12. Between stator 11 and rotor 12 remains an air gap 15.
  • Figure 1 also shows a pyrometric temperature sensor. This is either permanently installed in the generator 10 or for inspection currently inserted into this, for example via a cooling slot.
  • the pyrometric Tempe ⁇ temperature sensor comprises at its lying in the region of the air gap 15 tip 14 a sensor head.
  • the sensor head includes a lens to focus incoming radiation onto an optical fiber 13 which has an open end on ⁇ in the sensor head.
  • Optical waveguide 13 and the lens are arranged fixed in Sen ⁇ sorkopf each other, for example, by a sleeve which encloses both elements.
  • the lens can be oriented such that the direction from which radiation is received in the optical waveguide 13 deviates from the radial direction in the generator.
  • other optical elements such as prisms can be provided for this purpose.
  • the optical waveguide 13 in this embodiment is a flexible fiber having a core of quartz glass with a diameter of 1.5 mm. In other embodiments, it is also possible to use an optical waveguide 13 with a core diameter of, for example, 1 mm or 2 mm.
  • the optical waveguide 13 adjoins the generator to a shunting device 16.
  • the Shutter Hughes 16 is configured to transport light in the optical waveguide 13 ge ⁇ controls to stop or divert the radiation and allow the radiation to pass.
  • the Shutter listening 16 may be integrally ⁇ arranged in an interruption of the optical waveguide 13, and for example, comprise a mechanically shiftable shading.
  • the shutting device 16 can also be realized as an electronic shutter. Alternatively, it is also possible that the properties of the optical waveguide 13 are influenced without an interruption from the outside in order to achieve a shutter effect.
  • the radiation impinges on an InGaAs photodiode 17.
  • ⁇ de radiation triggers an electrical signal which is supplied to a control electronics ⁇ 18th
  • the control electronics 18 comprise an amplifier which amplifies the signal coming from the InGaAs photodiode 17 by a very high amplification factor, such as 10 12 V / A. Since this interference as the dark current and even the heating of the InGaAs photodiode 17 by the incoming radiation also also amplified ⁇ overlay the and the signal of the thermal radiation of the object, operates the control electronics 18, the Shutter worn periodically by the Shutter drove the radiation short for just one Passing the measurement period. Therefore, to allow a bandwidth of, for example, 100 kHz for the measurement, the shuttle must be able to open and close in the range of individual ys or even below ys.
  • the measuring signal is then formed in the control electronics 18 from one or more values when the shutter device 16 is closed and one or more values when the shutter is open.
  • the measurement signal is a high-temporal high-resolution measure of the temperature of the surface of the object, here the Läu ⁇ fers 12 in the generator 10, wherein the temperature is less than 500 ° C is.
  • Conventional pyrometric sensors can operate at such low temperatures only with very long integration times, for example, of one second.
  • An improvement of the measuring signal can be characterized Errei ⁇ chen that the periodic rotational motion of the generator ge ⁇ uses 10.
  • the signal of the InGaAs photodiode 17 is thereby repeated periodically according to the rotational speed of the generator 10.
  • a signal generator may also be used, for example an inductive proximity switch in the sensor head. This registers, for example, the passing of a turbine blade. With the prior knowledge of the number of existing turbine blades, the control electronics 18 can always determine the rotational speed.
  • control electronics 18 Another possibility is that an already existing speed information in the control electronics 18 is shared.
  • the control of the generator 10 may already have a sensor or otherwise generated information about the rotational speed, which is communicated to the control electronics 18.
  • the control electronics 18 is connected to the generator 10 in order to receive information about the rotational speed.
  • the signal of the InGaAs photodiode can be broken into fragments 17 which each correspond to a ⁇ wells rotation.
  • signals from a plurality of rotations are available for each location of the surface of the rotor 12, for the measurements made ⁇ who, which can be averaged to obtain an improved signal value for the particular location.
  • An improvement of the signal can also be achieved by providing the considered surface, for example the outer rotor surface of the generator 10, with a matt color with a high emissivity.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

Capteur de température pyrométrique pour déterminer la température d'un objet, inférieure à 500°C. Ce capteur thermique comprend : un photocapteur d'infrarouge proche pour recevoir le rayonnement thermique émis par l'objet, un dispositif d'obturation pour interrompre de manière commandée la réception du rayonnement avec une fréquence d'au moins 1 kHz, un système électronique de commande, conçu pour amplifier le signal électrique avec un facteur d'au moins 1011 V/A et pour déterminer la température à partir de la différence entre un signal d'obscurité, lorsque la propagation du rayonnement par le dispositif d'obturation est interrompue, et un signal de clarté, lorsque le dispositif d'obturation est ouvert.
PCT/EP2016/054445 2015-03-02 2016-03-02 Capteur de température pyrométrique et procédé de détection pyrométrique Ceased WO2016139257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015203633.2A DE102015203633A1 (de) 2015-03-02 2015-03-02 Pyrometrischer Temperatursensor und Verfahren zur pyrometrischen Detektion
DE102015203633.2 2015-03-02

Publications (1)

Publication Number Publication Date
WO2016139257A1 true WO2016139257A1 (fr) 2016-09-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/054445 Ceased WO2016139257A1 (fr) 2015-03-02 2016-03-02 Capteur de température pyrométrique et procédé de détection pyrométrique

Country Status (2)

Country Link
DE (1) DE102015203633A1 (fr)
WO (1) WO2016139257A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855864A (en) * 1972-07-06 1974-12-24 Rolls Royce Radiation pyrometers
US5258619A (en) * 1984-09-04 1993-11-02 Hughes Aircraft Company Pulsed bias radiation detector
WO1999054692A2 (fr) * 1998-04-14 1999-10-28 Advanced Fuel Research, Inc. Thermometre a rayonnement infrarouge grande vitesse, systeme et procede
US20130235391A1 (en) * 2012-03-06 2013-09-12 Erwan Baleine One-dimensional coherent fiber array for inspecting components in a gas turbine engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855864A (en) * 1972-07-06 1974-12-24 Rolls Royce Radiation pyrometers
US5258619A (en) * 1984-09-04 1993-11-02 Hughes Aircraft Company Pulsed bias radiation detector
WO1999054692A2 (fr) * 1998-04-14 1999-10-28 Advanced Fuel Research, Inc. Thermometre a rayonnement infrarouge grande vitesse, systeme et procede
US20130235391A1 (en) * 2012-03-06 2013-09-12 Erwan Baleine One-dimensional coherent fiber array for inspecting components in a gas turbine engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YOON H W ET AL: "SSE and Noise-Optimized InGaAs Radiation Thermometer", INTERNATIONAL JOURNAL OF THERMOPHYSICS ; JOURNAL OF THERMOPHYSICAL PROPERTIES AND THERMOPHYSICS AND ITS APPLICATIONS, KLUWER ACADEMIC PUBLISHERS-CONSULTANTS BUREAU, NE, vol. 28, no. 6, 6 November 2007 (2007-11-06), pages 2076 - 2086, XP019552086, ISSN: 1572-9567, DOI: 10.1007/S10765-007-0309-5 *

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Publication number Publication date
DE102015203633A1 (de) 2016-09-22

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