CN209264104U - A kind of measuring device of high speed rotor vibrational state - Google Patents
A kind of measuring device of high speed rotor vibrational state Download PDFInfo
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- CN209264104U CN209264104U CN201822109245.4U CN201822109245U CN209264104U CN 209264104 U CN209264104 U CN 209264104U CN 201822109245 U CN201822109245 U CN 201822109245U CN 209264104 U CN209264104 U CN 209264104U
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- rotor
- high speed
- time
- lens
- vibrational state
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Abstract
The utility model discloses a kind of measuring devices of high speed rotor vibrational state, comprising: pulsed laser light source, time dispersive module, spatial dispersion module, detection and message processing module.The device utilizes optical time domain extension technology, by dispersion compensating fiber and diffraction grating, carries out frequency-time conversion and time-space conversion respectively, the wavelength information of broadband optimal pulse is mapped as time-domain information and spatial information；Carry the light pulse of rotor oscillation information, it is detected by high-speed photodiode, acquires data by wide bandwidth analogue oscillograph and computer carries out image procossing and display, real-time monitoring can be carried out to the vibrational state of high speed rotor, monitoring frequency is much higher than conventional method；The device can quick, real-time and non-contact monitoring high-speed cruising rotor vibration information.
Description
Technical field
The utility model belongs to optical time domain extension imaging field, and in particular to a kind of measurement of high speed rotor vibrational state
Device.
Background technique
Rotor plays an important role in modern industry as the basic element of character in mechanical equipment.However, prolonged
In operation, very likely there are various technical failures in rotor.Real-time and non-contact monitoring rotor vibrational state, the event to equipment
Barrier diagnosis and prediction are of great significance.Conventional method is to be monitored using vibrating sensor, but measurement frequency is often lower,
The real-time vibration information of high speed rotor can not be obtained.Therefore, it is necessary to a kind of new devices to carry out the real-time of real-time monitoring high speed rotor
Operating condition, and given a warning in early days, to avoid failure risk.
Utility model content
The purpose of this utility model is to overcome deficiency in the prior art, a kind of high speed rotor vibrational state is provided
Measuring device, the device can quick, real-time and non-contact monitoring high-speed cruising rotor vibration informations.
The purpose of this utility model is achieved through the following technical solutions:
A kind of measuring device of high speed rotor vibrational state, comprising: pulsed laser light source, time dispersive module, space color
Dissipate module, detection and message processing module.The device utilizes optical time domain extension technology, passes through dispersion compensating fiber and diffraction light
Grid carry out frequency-time conversion and time-space conversion respectively, the wavelength information of broadband optimal pulse are mapped as time-domain information
And spatial information；The light pulse for carrying rotor oscillation information, is detected by high-speed photodiode, by wide bandwidth analogue oscillograph
It acquires data and computer carries out image procossing and display, real-time monitoring, monitoring can be carried out to the vibrational state of high speed rotor
Frequency is much higher than conventional method；
Pulsed laser light source is a kind of ultrashort mode locking femtosecond fiber pulse laser, can issue ultrashort Femtosecond Optical Pulses；
Time dispersive module is made of the dispersion compensating fiber of two big abbe number, and dispersion compensating fiber and laser are logical
End optical fiber flange plate connection is crossed, ultrashort light pulse carries out dispersion extension in dispersion compensating fiber, stretches the time domain width of pulse；
Spatial dispersion module is made of beam-expanding system, diffraction grating and condenser lens, and beam-expanding system is made of two pieces of lens,
The waist radius of light pulse is amplified 3 times, diffraction grating carries out spatial dispersion to pulse, realizes pulse wavelength information and space bit
The one-to-one correspondence of confidence breath, will be in the pulse concentration to rotor after diffraction dispersion light splitting by condenser lens；
Optical circulator and optical fiber collimator, the effect of optical circulator are equipped between time dispersive module and spatial dispersion module
To separate the light of forward and reverse transmission, laser pulse is collimation parallel light emergence after optical fiber collimator.
Further, it is connected between dispersion compensating fiber, optical circulator and optical fiber collimator by fiber coupler；
Further, reflecting mirror can reflect the light for carrying rotor oscillation information, return to it along original optical path；
Further, detection and message processing module, including ultrafast photodiode, the wide bandwidth each other by electrical connection
Analog oscilloscope and computer, for detecting, handling and showing the light pulse of carrying rotor oscillation information；Wherein photodiode
It is connect with optical circulator.
Compared with prior art, beneficial effect brought by the technical solution of the utility model is:
The utility model uses the ultrashort laser pulse of high repetition frequency, using optical time domain extension imaging technique, to height
The vibration information of fast rotor is detected, handled and is shown, the rate of monitoring is greatly enhanced, with photodiode generation
For traditional CCD/CMOS detector, it can be achieved that real-time monitoring to high speed rotor vibration information.
Detailed description of the invention
Fig. 1 is the principles of the present invention and structural schematic diagram.
Appended drawing reference: 1- pulse laser, 2- dispersion compensating fiber, 3- optical circulator, 4- optical fiber collimator, 5- first are saturating
Mirror, the second lens of 6-, 7- diffraction grating, 8- the third lens, 9- rotor, 10- reflecting mirror, 11- photodiode, 12- simulation are shown
Wave device, 13- computer
Specific embodiment
Illustrate that the embodiments of the present invention, following embodiment will be helpful to the skill of this field below by way of specific example
Art personnel further understand the utility model, but do not limit the utility model in any form.It should be pointed out that this field
Those of ordinary skill for, without departing from the concept of the premise utility, several changes and improvements can also be made, this
Belong to the protection scope of the utility model.
The utility model provides a kind of measuring device of high speed rotor vibrational state, comprising: pulsed laser light source, when secondary color
Dissipate module, spatial dispersion module, detection and message processing module.
Wherein laser pulse light source, is a kind of ultrashort mode locking femtosecond fiber pulse laser 1, central wavelength 1550nm,
It can produce the ultrashort laser pulse that pulsewidth is 800fs, repetition rate is 50MHz.
Time dispersive module is made of two dispersion compensating fibers 2 with big abbe number, abbe number 2ns/nm/
Km, dispersion compensating fiber 2 are connect with pulse laser 1 by end optical fiber flange plate connector, and laser pulse is in dispersion compensating fiber 2
Interior progress dispersion extension, stretches the time domain width of pulse, and optical time domain information is completely visited by photodiode 11
It surveys and acquires.
Spatial dispersion module, including beam-expanding system, diffraction grating 7 and for the third lens 8 of focusing；Beam-expanding system is by
One lens 5 and the second lens 6 are constituted, and the center of the center of the first lens 5 and the second lens 6 is coaxial, and focal length is respectively 30mm
And 100mm, laser facula amplify 3 times after beam-expanding system, diffraction grating 7 carries out spatial dispersion to pulse, realizes pulse wavelength
Space optical pulse is focused on rotor by the third lens 8, is made in light pulse by the one-to-one correspondence of information and spatial positional information
The component of different wave length is radiated on the different location of rotor 9, so that the vibration information to rotor 9 is acquired, diffraction grating 7
Grating constant be 1/600 millimeter, the focal lengths of the third lens 8 is 250mm.Rotor 9 is located on the focal plane of the third lens 8.
It is equipped with optical circulator 3 and optical fiber collimator 4 among time dispersive module and spatial dispersion module, optical circulator 3
Effect is separates the light of forward and reverse transmission, and the optical transport that will reflect back into message processing module, laser pulse is through optical fiber
It is collimation parallel light emergence after collimator 4.
Specifically, being connected between dispersion compensating fiber 2, optical circulator 3 and optical fiber collimator 4 by fiber coupler.
Specifically, the reflectivity with higher of reflecting mirror 10, reflectivity 99%, effect are that reflection carries 9 speed of rotor
The light of degree and vibration information, makes it along backtracking.It carries after the light pulse of 9 vibration information of rotor reflected by reflecting mirror 10,
It along backtracking, is acquired by same optical fiber collimator 4, then enters detection and message processing module after optical circulator 3.
Specifically, detection and message processing module, including photodiode 11, analog oscilloscope 12 and computer 13, it uses
To receive, handle the light pulse for carrying 9 vibration information of rotor, between photodiode 11, analog oscilloscope 12 and computer 13
To be electrically connected, using the traditional CCD/CMOS detector of replacement of photodiode 11, it can be achieved that the real-time acquisition to high speed rotor 9
And imaging.
Technical solution based on the above embodiment, utility model device use the ultrashort pulse of high repetition frequency,
The vibration information of high speed rotor is acquired, monitoring rate is substantially increased, traditional CCD/ is replaced with photodiode
Cmos detector is, it can be achieved that acquiring and monitoring to the real-time of high speed rotor vibration information.
The utility model is not limited to embodiments described above.Above the description of specific embodiment is intended to describe
With illustrate the technical solution of the utility model, the above mentioned embodiment is only schematical, is not restrictive.?
In the case of not departing from the utility model aims and scope of the claimed protection, those skilled in the art are practical at this
The specific transformation of many forms can be also made under novel enlightenment, these are belonged within the protection scope of the utility model.
Claims (5)
1. a kind of measuring device of high speed rotor vibrational state, which is characterized in that including set gradually pulse laser (1),
Dispersion compensating fiber (2), optical fiber collimator (4), beam-expanding system, diffraction grating (7), the third lens (8), turns optical circulator (3)
Sub (9) and reflecting mirror (10), the side of the optical circulator (3), which also passes sequentially through, is electrically connected with photodiode (11), simulation
Oscillograph (12) and computer (13)；
The pulse laser (1) is connect with dispersion compensating fiber (2) by end optical fiber flange plate connector；
It is connected between the dispersion compensating fiber (2), optical circulator (3) and optical fiber collimator (4) by fiber coupler；
The rotor (9) is located on the focal plane of the third lens (8).
2. a kind of measuring device of high speed rotor vibrational state according to claim 1, which is characterized in that the pulse swashs
Light device (1) is a kind of ultrashort mode locking femto second optical fiber laser.
3. a kind of measuring device of high speed rotor vibrational state according to claim 1, which is characterized in that the beam-expanding system
It is made of the first lens (5) and the second lens (6), the center of the first lens (5) and the center of the second lens (6) are coaxial.
4. a kind of measuring device of high speed rotor vibrational state according to claim 1, which is characterized in that pulse laser
(1) light issued successively through time dispersive, collimate, expand, after spatial dispersion, focused on rotor (9) through the third lens (8),
Carry rotor (9) vibration information light pulse through reflecting mirror (10) reflection after along backtracking, by photoelectricity after optical circulator (3)
Diode (11), analog oscilloscope (12), computer (13) acquisition, processing and display.
5. a kind of measuring device of high speed rotor vibrational state according to claim 1, which is characterized in that the dispersion compensation
Optical fiber (2) is provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822109245.4U CN209264104U (en) | 2018-12-14 | 2018-12-14 | A kind of measuring device of high speed rotor vibrational state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822109245.4U CN209264104U (en) | 2018-12-14 | 2018-12-14 | A kind of measuring device of high speed rotor vibrational state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209264104U true CN209264104U (en) | 2019-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822109245.4U Expired - Fee Related CN209264104U (en) | 2018-12-14 | 2018-12-14 | A kind of measuring device of high speed rotor vibrational state |
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| CN (1) | CN209264104U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520609A (en) * | 2018-12-14 | 2019-03-26 | 天津大学 | A kind of measuring device of high speed rotor vibrational state |
| CN113358365A (en) * | 2021-05-26 | 2021-09-07 | 电子科技大学 | Aero-engine turbine disk radiation information acquisition probe |
-
2018
- 2018-12-14 CN CN201822109245.4U patent/CN209264104U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520609A (en) * | 2018-12-14 | 2019-03-26 | 天津大学 | A kind of measuring device of high speed rotor vibrational state |
| CN113358365A (en) * | 2021-05-26 | 2021-09-07 | 电子科技大学 | Aero-engine turbine disk radiation information acquisition probe |
| CN113358365B (en) * | 2021-05-26 | 2022-11-08 | 电子科技大学 | Aero-engine turbine disk radiation information acquisition probe |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190816 Termination date: 20191214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |