WO2005047840A1 - トルク計測装置 - Google Patents
トルク計測装置 Download PDFInfo
- Publication number
- WO2005047840A1 WO2005047840A1 PCT/JP2004/016659 JP2004016659W WO2005047840A1 WO 2005047840 A1 WO2005047840 A1 WO 2005047840A1 JP 2004016659 W JP2004016659 W JP 2004016659W WO 2005047840 A1 WO2005047840 A1 WO 2005047840A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- laser light
- rotating body
- reflected light
- reflected
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/12—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving photoelectric means
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Definitions
- the present invention relates to a torque measuring device that optically measures the rotation speed and shaft torque of a rotating body in a non-contact manner, and particularly to a torque measuring device applied to a conjoint cycle power plant or a steam turbine plant.
- a conjoint cycle power plant is a thermal power plant in which a gas turbine and a steam turbine are combined to improve thermal efficiency and achieve high efficiency and high operability.
- the combined cycle power plant is configured to guide the waste heat of the gas turbine to the waste heat recovery boiler and to drive the steam turbine with the steam generated by the waste heat recovery boiler to improve the thermal efficiency.
- a combined cycle power plant is composed of a plurality of units, each unit having a gas turbine and a steam turbine, and a single-shaft configuration in which one generator is driven by a gas turbine and a steam turbine. Has become.
- thermal efficiency management it is important to determine the cause of the decrease in thermal efficiency. In this case, it is necessary to know whether the cause of the decrease in thermal efficiency is on the gas turbine side, on the steam turbine side, or on other major components. In order to grasp the thermal efficiency, it is necessary to grasp the gas turbine output and the steam turbine output.
- an optical system for detecting the torque of a drive shaft (rotating body) of a rotating device such as a gas turbine or a steam turbine is used.
- Various torque measuring devices have been developed.
- a pair of reflectors are provided at different positions in the axial direction of the rotating body, laser light is applied to both reflectors, reflected light from both reflectors is detected, and the period of the reflected light is determined.
- the rotation period of the rotating body is obtained based on the dynamic strength, and the torque of the rotating body is detected based on the delay time of the reflected light from both reflectors (for example, see Patent Document 1).
- Japanese Patent Application No. 2002-221347 which was an earlier application filed by the present applicant, discloses that a light beam incident on a reflector of a laser beam and a light beam reflected from the reflector are formed as separate optical paths, and the reflected light beam The loss is reduced so that high-power laser light is not required.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-22564
- incident light and reflected light can be illuminated and received on the same optical path, but reflected via a beam splitter provided on a single optical path.
- the incident light is incident on the body, and the reflected light from the reflector passes through the beam splitter on the same optical path and is received in a different direction from the incident light.
- light loss occurs every time the light passes through the beam splitter.
- the power loss that can reduce the optical loss is made by using separate light paths for incident light and reflected light, so that the number of parts of the optical system increases and the size of the optical system itself also increases. .
- FIG. 4 is an explanatory diagram of a light irradiation detection unit in a case where an incident light beam and a reflected light beam of a laser beam on a reflector are provided as separate optical paths.
- the light irradiation detecting section 11 has an incident side lens 12 and a light receiving side lens 13.
- the incident side lens 12 receives the laser light from the laser light output device by the incident optical fiber 14 and guides the laser light to the irradiation condenser lens 16 by the prism 15.
- the illumination condenser lens 16 is divided into two regions symmetrical with respect to the central axis, and the incident light is radiated from one region of the illumination condenser lens 16 to the surface of the rotating body 17 on which the reflector 18 is attached. Is done.
- the light reflected by the reflector 18 of the rotating body 17 is incident on the light receiving side lens 13 from the other area of the irradiation condenser lens 16, and is guided to the signal processing device by the light receiving fiber 19.
- the separate configuration is adopted in which the optical path of the incident light and the optical path of the reflected light are separate areas.
- the irradiation condenser lens 16 facing the reflector 18 is divided into two regions and separate paths for the incident light and the reflected light, so that the size of the irradiation condenser lens 16 itself also becomes large.
- the tip of the light irradiation detection unit 11 for irradiating and receiving the laser light facing the reflector 18 is large. This makes it difficult to measure in narrow places.
- An object of the present invention is to provide a torque measurement device that can reduce the size of a light irradiation detection unit that irradiates laser light to a reflector of a rotating body and receives the reflected light.
- a torque measuring device includes a laser light output device that outputs laser light, a light transmitting and receiving device that irradiates the laser light from the laser light output device onto the surface of a rotating body and receives reflected light, A reflector that is provided at intervals in the axial direction of the surface of the rotating body and reflects laser light emitted from the optical transmitting and receiving device in a predetermined reflection pattern, and a reflected light received by the optical transmitting and receiving device.
- a polarization preserving fiber circulator that inputs the same optical path force that outputs the polarized laser light, separates the laser light from the laser light output device power, and outputs the separated laser light to the signal processing device; and the reflector.
- the polarization-maintaining fiber circulator is provided so as to face the surface portion of the rotating body, and the polarized laser light having the power is input to irradiate the surface portion of the rotating body and detect reflected light to detect the polarization-maintaining light.
- a light irradiation detecting unit for transmitting reflected light detected on the same optical path to which the polarized laser light from the fiber circulator is input.
- the light irradiation detection unit that irradiates a laser beam onto the surface of the rotating body provided with the reflector and detects the reflected light is a polarization detector from the polarization preserving fiber circulator. Since the reflected light of the force of the surface of the rotating body is transmitted to the polarization maintaining fiber circulator, the incident light and the reflected light can be transmitted and received using the same optical path. Therefore, the number of components of the light irradiation detection unit is relatively small, and the size of the light irradiation detection unit itself can be reduced, so that the weight can be reduced.
- the size of the light irradiation detection unit itself can be reduced, it can be installed even in a narrow place. Therefore, even if there is a request to perform a high-precision torque measurement with a constraint on the size of the light irradiation detection unit, the torque measurement can be performed even on a rotating body that cannot be performed despite the demand.
- FIG. 1 is a block diagram of a torque measuring device according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram of a polarization maintaining fiber circulator according to an embodiment of the present invention.
- FIG. 3 is an explanatory diagram of a light irradiation detecting section in the torque measuring device of the present invention.
- FIG. 4 is an explanatory diagram of a light irradiation detecting unit in a case where an incident light beam and a reflected light beam of a laser beam to a reflector are formed as separate optical paths.
- FIG. 1 is a block diagram of a torque measuring device according to an embodiment of the present invention.
- the torque measuring device includes a laser light output device 20 that outputs laser light, an optical transmitting and receiving device 21 that irradiates the surface of the rotating body 17 with laser light from the laser light output device 20 and receives reflected light, Reflectors 18a and 18b which are provided at intervals in the axial direction of the surface of the body 17 and reflect the laser light radiated from the optical transmitting and receiving device 21 in a predetermined reflection pattern, and reflected light received by the optical transmitting and receiving device 21 And a signal processing device 22 for obtaining the torque of the rotating body 17 based on the signal processing device 22.
- the optical transmitting / receiving device 21 is configured to receive reflected light having the same optical path force as the optical path for outputting laser light from the laser light output device 20 via the branch connector 23, and to reflect the incident light and the reflected light. Sharing the light path. That is, with respect to the optical path between the polarization maintaining fiber circulators 24a and 24b and the rotator 17, both the incident light and the reflected light are transmitted using the same optical path.
- the optical transmission / reception device 21 includes polarization maintaining fiber circulators 24a and 24b, and also includes incident light receiving fibers 25a and 25b for guiding both incident light and reflected light, and light irradiation detectors 11a and lib.
- the laser light output from the laser light output device 20 is connected to the optical branch connector of the optical transmitting and receiving device 21.
- the laser beam is split into two laser beams at the rectifier 23 and guided to the polarization maintaining fiber circulators 24a and 24b, respectively.
- the polarization-maintaining fiber circulators 24a and 24b are provided corresponding to a pair of reflectors 18a and 18b provided on the surface of the rotating body 17 with an interval in the axial direction, and are provided with a laser light output device. Polarize the laser light from 20 and output the polarized laser light.
- the polarized laser light from the polarization-maintaining fiber circulators 24a and 24b is guided by the incident light-receiving fibers 25a and 25b and is input to the light irradiation detectors 11a and 11b, respectively.
- the light irradiation detection sections l la and l ib are provided facing the surface of the rotating body 17 on which the reflector 18 is provided, and the polarized laser light from the polarization maintaining fiber circulators 24a and 24b is provided.
- the light irradiation detection sections l la and l ib have incident light receiving lenses 26a and 26b, and the polarized laser light guided by the incident light receiving fibers 25a and 25b is converted into parallel light to the irradiation condenser lenses 16a and 16b.
- the light is condensed by the irradiation condenser lenses 16a and 16b, and is irradiated on the surface of the rotating body 17.
- a pair of reflectors 18a and 18b are provided on the surface of the rotating body 17 to which the laser light is irradiated from the irradiation condenser lenses 16a and 16b, respectively.
- the reflectors 18a and 18b have, for example, a reflection pattern in which a portion that reflects laser light and a portion that absorbs laser light are formed in a barcode shape. The reflected light is generated according to.
- the reflected light from the reflectors 18a and 18b is incident on the irradiation condenser lenses 16a and 16b of the light irradiation detection sections lla and lib, and is detected.
- the detected reflected light is collected by the incident light receiving lenses 26a and 26b, guided to the incident light receiving fibers 25a and 25b, and input to the polarization maintaining fiber circulators 24a and 24b. That is, the reflected light is sent out on the same optical path as the input path of the polarized laser light from the polarization-maintaining fiber circulators 24a and 24b.
- the reflected light is separated from the laser light from the laser light output device 20 and guided to the light detection devices 27a and 27b.
- the reflected light detected at is output to the signal processing device 22.
- the signal processing device 22 calculates the rotation period and the amount of twist of the rotating body 17 using a correlation function based on the reflected light reflected by the reflecting body 18 among the reflected lights reflected by the surface of the rotating body 17, More twist From the torque.
- the light irradiation detection units l la and l ib are provided with a drive device (not shown), and the light irradiation detection units l la and l ib are moved in the focal axis direction by this drive device. The focal length of the laser beam irradiated onto the surface of the rotating body 17 from the rib is adjusted.
- FIG. 2 is an explanatory diagram of the polarization maintaining fiber circulator 24.
- the polarization-maintaining fiber circulator 24 outputs the laser light input from the A terminal and the A terminal for inputting the laser light from the laser light output device 20 and the reflected light from the reflector 18 of the rotating body 17. It has a B terminal and a C terminal that outputs the reflected light input from the B terminal.
- the laser light input to the A terminal is polarized by being applied with a magnetic field inside the polarization-maintaining fiber circulator 24 and becomes polarized laser light, which is output from the B terminal. Therefore, the laser light output from the B terminal to the surface portion of the rotating body 17 is a polarized laser light obtained by applying a polarization to the laser light from the laser light output device.
- This polarized laser light is reflected by the reflector 18 on the surface of the rotating body 17 to become reflected light, and this reflected light is input to the B terminal through the same optical path as when the polarized laser light is output. .
- the reflected light is polarized laser light.
- Output to C terminal instead of A terminal. Since the light detection device 27 is connected to the C terminal, the reflected light can be separated from the laser light from the laser light output device 20 and output to the signal processing device 22.
- FIG. 3 is an explanatory view of the light irradiation detecting unit 11 in the torque measuring device of the present invention.
- FIG. 3 (a) is a front view of the light irradiation detecting unit 11 in the embodiment of the present invention
- FIG. () Is a front view of the light irradiation detection unit 11 in a case where the incident light beam and the reflected light beam of the laser light to the reflector 18 are formed as separate optical paths.
- the diameter of the irradiation condenser lens 16 according to the embodiment of the present invention is xl
- the width of the light irradiation detection unit 11 is yl
- the width of the fixture is zl.
- the diameter of the irradiation condenser lens 16 is x2
- the width of the light irradiation detection unit 11 is y2
- the mounting fixture 28 is The width is z2.
- the attachment 28 fixes the light irradiation detector 11 when irradiating the surface of the rotating body 17 with laser light. It is for doing.
- the diameter of the irradiation condenser lens 16 of the present invention shown in FIG. 3A is about 1Z2. This is because, in the case of the light irradiation detection unit 11 of the present invention, the incident light and the reflected light pass through the same light path, whereas the light irradiation detection unit 11 of the separate light path shown in FIG. This is because the condenser lens 16 is divided into two regions, and the incident light and the reflected light pass through each of the divided regions individually.
- the width of the light irradiation detection unit 11 of the present invention shown in Fig. 3A is 1Z4 or less. This is because the light irradiation detection unit 11 of the present invention does not require the prism 15 shown in FIG. 4, and replaces the incident side lens 12 and the light receiving side lens 13 with the incident light receiving lens 26. This is because the incident light receiving lens 26 is also about 1Z2 since 16 is about 1Z2. Note that the prism 15 is unnecessary not only for the horizontal width but also for the vertical width of the light irradiation detection unit 11, so that the present invention shown in FIG. 3A can be made smaller. As for the width of the fixture 28, similarly to the width of the light irradiation detector 11, the width of the present invention shown in FIG.
- the configuration is such that reflected light having the same optical path force as the optical path for outputting laser light is received, so that the number of components can be reduced, and the light irradiation detection unit 11 can be made compact. And light weight can be achieved.
- the light irradiation detection unit 11 like a pen type, and it is possible to mount the light irradiation detection unit 11 in a narrow part. Therefore, the number of places where torque measurement can be performed can be greatly increased.
- the size of the light irradiation detection unit itself can be reduced, it can be installed even in a narrow place. Therefore, the torque measurement can be applied to a powerful rotating body that cannot perform a high-accuracy torque measurement because the light irradiation detection unit cannot be installed in a narrow place due to the limitation of the size of the light irradiation detection unit.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/578,542 US20070056387A1 (en) | 2003-11-14 | 2004-11-10 | Torque measuring device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-384555 | 2003-11-14 | ||
JP2003384555A JP2005147812A (ja) | 2003-11-14 | 2003-11-14 | トルク計測装置 |
Publications (1)
Publication Number | Publication Date |
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WO2005047840A1 true WO2005047840A1 (ja) | 2005-05-26 |
Family
ID=34587325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016659 WO2005047840A1 (ja) | 2003-11-14 | 2004-11-10 | トルク計測装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20070056387A1 (ja) |
JP (1) | JP2005147812A (ja) |
WO (1) | WO2005047840A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008007431A1 (fr) * | 2006-07-13 | 2008-01-17 | The Tokyo Electric Power Company, Incorporated | Dispositif et programme de mesure de couple |
US7586083B2 (en) * | 2007-01-03 | 2009-09-08 | Gm Global Technology Operations, Inc. | Laser sensor apparatus and method for detecting transmission shaft torque |
US8042412B2 (en) * | 2008-06-25 | 2011-10-25 | General Electric Company | Turbomachinery system fiberoptic multi-parameter sensing system and method |
ITCO20120008A1 (it) | 2012-03-01 | 2013-09-02 | Nuovo Pignone Srl | Metodo e sistema per monitorare la condizione di un gruppo di impianti |
US9176024B2 (en) * | 2013-10-23 | 2015-11-03 | General Electric Company | Systems and methods for monitoring rotary equipment |
RU2696626C1 (ru) * | 2018-10-25 | 2019-08-05 | Акционерное общество "Проектно-конструкторское бюро "РИО" | Приемо-передающее оптическое устройство |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002131139A (ja) * | 2000-10-24 | 2002-05-09 | Oki Electric Ind Co Ltd | 光ファイバセンサ並びに光ファイバの調節方法及び装置 |
JP2003270255A (ja) * | 2002-03-15 | 2003-09-25 | Toshiba Corp | 回転体計測装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6339661B1 (en) * | 1999-10-20 | 2002-01-15 | Micro-Optics, Inc. | Polarization maintaining fiber optic circulators |
JP4183370B2 (ja) * | 2000-07-07 | 2008-11-19 | 株式会社東芝 | トルク計測装置 |
-
2003
- 2003-11-14 JP JP2003384555A patent/JP2005147812A/ja active Pending
-
2004
- 2004-11-10 US US10/578,542 patent/US20070056387A1/en not_active Abandoned
- 2004-11-10 WO PCT/JP2004/016659 patent/WO2005047840A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002131139A (ja) * | 2000-10-24 | 2002-05-09 | Oki Electric Ind Co Ltd | 光ファイバセンサ並びに光ファイバの調節方法及び装置 |
JP2003270255A (ja) * | 2002-03-15 | 2003-09-25 | Toshiba Corp | 回転体計測装置 |
Also Published As
Publication number | Publication date |
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JP2005147812A (ja) | 2005-06-09 |
US20070056387A1 (en) | 2007-03-15 |
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