CN110926589B - Optical fiber vibration sensor static calibration device - Google Patents
Optical fiber vibration sensor static calibration device Download PDFInfo
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- CN110926589B CN110926589B CN201911235125.1A CN201911235125A CN110926589B CN 110926589 B CN110926589 B CN 110926589B CN 201911235125 A CN201911235125 A CN 201911235125A CN 110926589 B CN110926589 B CN 110926589B
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- optical fiber
- calibration
- vibration sensor
- fiber vibration
- sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention provides a static calibration device of an optical fiber vibration sensor, which comprises a static calibration module (1), a calibration base (2), a sensor mounting base (3), a displacement mechanism (4), an optical fiber vibration sensor (5), a power supply (6) and a signal oscilloscope (7). The static calibration device for the optical fiber vibration sensor provided by the invention realizes the static calibration of the optical fiber vibration sensor in the non-contact vibration measurement of an aircraft engine, improves the calibration efficiency and the calibration precision, and realizes the static quantitative calibration of the optical fiber vibration sensor.
Description
Technical Field
The invention belongs to the technical field of vibration testing of aircraft engines, and particularly relates to a static calibration device of an optical fiber vibration sensor
Background
The non-contact vibration measurement can verify the blade finite element model prediction capability in the engine development stage, and can also monitor FOD (fatigue Object Damage), micro cracks and early warn high-cycle fatigue induced by various aerodynamic loads in the engine service stage. The method has very important significance and effect on ensuring the safe operation of the aero-engine and promoting the technical capability and level of the structural integrity of the aero-engine in China, and provides higher requirements for the non-contact vibration testing precision. As a core component in a test system, high-precision calibration of an optical fiber vibration sensor is the most important link in a non-contact vibration measurement program, and research and exploration of calibration technologies of the optical fiber vibration sensor by foreign aviation macros and suppliers (Ro-Rou, HOOD, EMTD, MTU and the like) of the foreign aviation macros never stops.
The static calibration of the optical fiber vibration sensor not only ensures the effectiveness of the use of the sensor, but also is the basis for ensuring the testing precision. At present, the optical fiber vibration sensor is calibrated mainly by adopting a mode of qualitatively judging the quality of the sensor, the quantitative static calibration of the sensor is not carried out, and a corresponding calibration rule is not formed.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems and achieve the purpose of quantitative static calibration of the sensor, the static calibration device of the optical fiber vibration sensor for non-contact vibration measurement is provided, the static calibration of the optical fiber vibration sensor in the non-contact vibration measurement technology is realized, the calibration efficiency and the calibration reliability are improved, and the static quantitative calibration of the optical fiber vibration sensor is realized.
Technical scheme
The device comprises a static calibration module (1), a calibration base (2), a sensor mounting base (3), a displacement mechanism (4), an optical fiber vibration sensor (5), a power supply (6) and a signal oscilloscope (7);
the static calibration module (1) and the sensor mounting base (3) are fixed on the calibration base (2), and the displacement mechanism (4) and the optical fiber vibration sensor (5) are both mounted on the sensor mounting base (3); the displacement mechanism (4) drives the sensor mounting base (3) to move on the calibration base (2), signals of the optical fiber vibration sensor can be absorbed by the static calibration module (1), a strong reflection area and a strong absorption area are arranged on one side, absorbing sensor signals, of the static calibration module (1), and the power supply (6) and the signal oscilloscope (7) are connected with the optical fiber vibration sensor (5).
Preferably, the strong reflection area is white and is used for simulating a real blade signal to realize the quantization of a calibration signal; the strong absorption area is black, and can completely absorb signals sent by the optical fiber vibration sensor, so that absolute 'zero' of the signals is realized.
Preferably, a sliding track is arranged on the calibration base (2), the sensor mounting base (3) is arranged on the sliding track, and positioning pins (8) used for limiting the displacement range of the sensor mounting base (3) are arranged at two ends of the sliding track.
Advantageous effects
The invention provides a static calibration device of an optical fiber vibration sensor, which realizes static calibration of the optical fiber vibration sensor in non-contact vibration measurement of an aircraft engine, improves calibration efficiency and calibration precision, and realizes static quantitative calibration of the optical fiber vibration sensor.
Drawings
FIG. 1 is a structural diagram of a static calibration device of an optical fiber vibration sensor provided by the invention
Wherein, 1: a static calibration module; 11: a strong reflection region; 12: a strong absorption region; 2: calibrating a base; 3: a sensor mounting base; 4: a displacement mechanism; 5: an optical fiber vibration sensor; 6: a power source; 7: a signal oscilloscope; 8: and positioning the pin.
Detailed Description
The invention is further explained below with reference to the drawings.
Fig. 1 is a structural diagram of a static calibration apparatus for an optical fiber vibration sensor according to the present invention. The device comprises a static calibration module 1, a calibration base 2, a sensor mounting base 3, a displacement mechanism 4, an optical fiber vibration sensor 5, a power supply 6 and a signal oscilloscope 7;
the optical fiber sensor 5 is installed on the sensor installation base 3 by adopting M6 threads, the positioning of the optical fiber vibration sensor 5 and the static calibration module 1 is realized by the installation hole on the sensor installation base 3, the displacement mechanism 4 drives the sensor installation base 3 to move through a threaded screw rod, so that the optical fiber vibration sensor 5 is respectively aligned to the strong reflection area 11 and the strong absorption area 12 of the static calibration module 1, and the power supply 6 and the signal oscilloscope 7 are both connected with the optical fiber vibration sensor 5.
The strong reflection area 11 is white and is used for simulating a real blade signal and realizing the quantification of a calibration signal; the strong absorption region 12 is black, and can completely absorb signals sent by the optical fiber vibration sensor, so that absolute 'zero' of the signals is realized.
The calibration base 2 is provided with a sliding track, the sensor mounting base 3 is arranged on the sliding track, and two ends of the sliding track are provided with positioning pins 8 used for limiting the displacement range of the sensor mounting base 3.
The device is used for carrying out static calibration on the optical fiber sensor, and the static calibration data is used for effectively judging and isolating 2 nd-stage rotor blade vibration signals of a certain type of engine, so that the smooth running of the engine test is ensured. In conclusion, the invention well solves the static quantitative calibration problem of the optical fiber vibration sensor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. The utility model provides a static calibration device of optic fibre vibration sensor which characterized in that: the device comprises a static calibration module (1), a calibration base (2), a sensor mounting base (3), a displacement mechanism (4), an optical fiber vibration sensor (5), a power supply (6) and a signal oscilloscope (7);
the static calibration module (1) and the sensor mounting base (3) are fixed on the calibration base (2), and the displacement mechanism (4) and the optical fiber vibration sensor (5) are both mounted on the sensor mounting base (3); the displacement mechanism (4) drives the sensor mounting base (3) to move on the calibration base (2), signals of the optical fiber vibration sensor (5) can be absorbed by the static calibration module (1), a strong reflection area (11) and a strong absorption area (12) are arranged on one side, absorbing the sensor signals, of the static calibration module (1), and the power supply (6) and the signal oscilloscope (7) are connected with the optical fiber vibration sensor (5);
the strong reflection area (11) is white and is used for simulating a real blade signal and realizing the quantification of a calibration signal; the strong absorption area (12) is black, and can completely absorb signals sent by the optical fiber vibration sensor, so that absolute 'zero' of the signals is realized.
2. The optical fiber vibration sensor static calibration device according to claim 1, wherein: the calibration device is characterized in that a sliding track is arranged on the calibration base (2), the sensor mounting base (3) is arranged on the sliding track, and positioning pins (8) used for limiting the displacement range of the sensor mounting base (3) are arranged at two ends of the sliding track.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911235125.1A CN110926589B (en) | 2019-12-05 | 2019-12-05 | Optical fiber vibration sensor static calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235125.1A CN110926589B (en) | 2019-12-05 | 2019-12-05 | Optical fiber vibration sensor static calibration device |
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| Publication Number | Publication Date |
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| CN110926589A CN110926589A (en) | 2020-03-27 |
| CN110926589B true CN110926589B (en) | 2022-04-22 |
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| CN104515475A (en) * | 2014-12-12 | 2015-04-15 | 天津大学 | Blade tip clearance measuring system based on large-frequency-difference double-frequency laser phase distance measurement |
| CN107131855A (en) * | 2017-04-14 | 2017-09-05 | 中国科学院光电研究院 | A kind of Spectral Confocal measuring system caliberating device and scaling method |
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