CN113959556A - Dynamic calibration device for rotating blade tip timing sensor - Google Patents
Dynamic calibration device for rotating blade tip timing sensor Download PDFInfo
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- CN113959556A CN113959556A CN202111107718.7A CN202111107718A CN113959556A CN 113959556 A CN113959556 A CN 113959556A CN 202111107718 A CN202111107718 A CN 202111107718A CN 113959556 A CN113959556 A CN 113959556A
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- blade
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
Abstract
The invention provides a dynamic calibration device for a rotating blade tip timing sensor in the field of aeroengine test equipment, which comprises a test bed base, a pneumatic excitation vibration measurement unit and a displacement sliding table, wherein the test bed base is provided with a base seat; a driving motor is arranged on the test bed base, a rotating main shaft is rotatably arranged on the driving motor, and a rotating disc is fixedly arranged on the rotating main shaft; the rotating disk is provided with a blade assembly, a conductive slip ring and a laser displacement sensor; the pneumatic excitation vibration measurement unit comprises a pneumatic nozzle piece, a blade tip timing sensor and an arc mounting seat, and the arc mounting seat is movably arranged on the displacement sliding table; a displacement sliding table is arranged on one side of the test bed base, and the arc mounting seat and the rotating disc are coaxially arranged. The invention simulates the vibration of the blade through pneumatic excitation or piezoelectric excitation, utilizes the laser displacement sensor to measure the tip displacement of the rotating blade, and compares the tip displacement of the blade measured by the tip timing sensor with the data measured by the laser sensor to realize the dynamic calibration of the tip timing sensor of the rotating blade, and has simple structure.
Description
Technical Field
The invention relates to the field of aeroengine test equipment, in particular to a dynamic calibration device for a rotating blade tip timing sensor.
Background
The blade is one of important parts of large-scale rotating machinery such as an aircraft engine/a gas turbine and the like, and the vibration state of the blade seriously affects the working performance of equipment; and the vibration state of the blade can reflect the health condition of equipment when the blade has faults such as rubbing, cracking and the like, so that the online monitoring of the rotating blade is a key means for ensuring the operation safety of an aeroengine/gas turbine. The blade tip timing technology is a non-contact vibration measurement technology of a rotating blade, and has been developed into an important direction in the field of aeroengine testing. However, no mature calibration device for the tip timing sensor is available at present.
At present, a test device is realized on the basis of an ideal condition that a blade does not vibrate, and in an actual process, the blade also vibrates due to factors such as gaps between rotating parts, rotating speed fluctuation and the like, so that certain errors are brought to calibration of a blade tip timing sensor; in addition, the existing test device needs a plurality of vibration tables for controlling the vibration of the sensor, and has certain influence on the installation and maintenance, the space use and the cost control of the test device.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a dynamic calibration device for a rotating blade tip timing sensor.
The dynamic calibration device for the rotating blade tip timing sensor comprises a test bed base, a pneumatic excitation vibration measurement unit and a displacement sliding table, wherein the test bed base is provided with a base plate;
a driving motor is arranged on the test bed base, a rotating main shaft is rotatably arranged on the driving motor, and a rotating disc is fixedly arranged at the other end of the rotating main shaft;
the rotating disc is provided with a plurality of blade assemblies, a plurality of conductive slip rings and a plurality of laser displacement sensors, the conductive slip rings and the rotating main shaft are coaxially arranged on the rotating disc, the plurality of blade assemblies are symmetrically distributed on the rotating disc about the conductive slip rings, the plurality of laser displacement sensors are symmetrically distributed on the rotating disc about the conductive slip rings;
the pneumatic excitation vibration measurement unit comprises a pneumatic spray head piece, a blade tip timing sensor and an arc mounting seat, wherein the pneumatic spray head piece and the blade tip timing sensor are circumferentially arranged on the arc mounting seat, and the arc mounting seat is movably arranged on the displacement sliding table;
the displacement sliding table is arranged on one side of the test bed base, the arc mounting seat corresponds to the rotating disc and is coaxially arranged, and the pneumatic nozzle piece and the tip timing sensor respectively correspond to the blade assembly.
In some embodiments, the driving motor is coupled to a rotating shaft, and the rotating shaft is sleeved with a first bearing and a second bearing.
In some embodiments, a motor base, a first bearing base and a second bearing base are arranged on the test bed base, the motor base, the first bearing base and the second bearing base are sequentially arranged on the test bed base, the first bearing part is fixedly arranged on the first bearing base, and the second bearing part is fixedly arranged on the second bearing base.
In some embodiments, the blade assembly comprises a first blade assembly and a second blade assembly, the first blade assembly comprises a first blade clamp, a second blade clamp and a blade, one end of the blade is clamped between the first blade clamp and the second blade clamp, and a piezoelectric fiber sheet is adhered to the surface of the blade;
the second blade assembly is arranged in the same structure as the first blade assembly;
the first blade assembly and the second blade assembly are symmetrically disposed about the conductive slip ring along a diameter of the rotating disk.
In some embodiments, a transfer plate is arranged on the displacement sliding table in a sliding mode, the pneumatic excitation vibration measurement unit is fixedly arranged on the transfer plate, a first fixing base and a second fixing base are arranged below the arc mounting seat, the other end of the first fixing base and the other end of the second fixing base are fixedly arranged on the transfer plate, the pneumatic spray head piece is fixedly arranged on the arc mounting seat through the pneumatic spray head mounting seat, and the tip timing sensor is fixedly arranged on the arc mounting seat through the sensor mounting seat.
In some embodiments, the laser displacement sensor comprises a first laser displacement sensor and a second laser displacement sensor, the first and second laser displacement sensors being symmetrically disposed about the electrically conductive slip ring along the diameter of the rotating disk, the first laser displacement sensor being disposed in correspondence with the blade tip of the first blade assembly, the second laser displacement sensor being disposed in correspondence with the blade tip of the second blade assembly.
In some embodiments, a sensor support is fixedly arranged on the test bed base, a rotation speed synchronization sensor is fixedly arranged on the sensor support and arranged corresponding to the rotating spindle, and a frequency converter is fixedly arranged on the test bed base and connected with the driving motor.
In some embodiments, a plurality of the pneumatic nozzle pieces are respectively connected to a flow divider, the flow divider is connected with a filter, the filter is connected with an air storage tank through an air pressure valve, and an air compressor is connected to the air storage tank.
In some embodiments, the blade assembly is electrically connected with the conductive slip ring, the conductive slip ring is electrically connected with a signal acquisition instrument through signals, the conductive slip ring is respectively and electrically connected with a power amplifier and a power supply, the power amplifier is in signal connection with a signal generator, and the signal acquisition instrument is in signal connection with an upper computer.
In some embodiments, the blade member is vibrated by pneumatic and piezoelectric excitation, the pneumatic excitation including in particular the operations of: the filter is used for drying the air, the flow divider is used for dividing the dried air to a plurality of pneumatic spray heads, and the air is sprayed to the blade pieces through the pneumatic spray head pieces to form pneumatic loads;
the signal generator outputs a simple harmonic signal to the power amplifier, the power amplifier and the conductive slip ring convert the simple harmonic signal into voltage and output the voltage to the piezoelectric fiber sheet on the surface of the blade piece, and the blade piece vibrates by utilizing the inverse piezoelectric effect of a piezoelectric material;
the power supply supplies power to the first laser displacement sensor and the second laser displacement sensor through the conductive sliding ring, the positions of the first laser displacement sensor and the second laser displacement sensor are adjusted to measure the displacement of the tip end of the blade, the displacement signals of the blade are output to the signal acquisition instrument through the conductive sliding ring, and the signal acquisition instrument outputs the signals to the upper computer.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the blade assembly and the laser displacement sensor are arranged on the rotating disk, the tip displacement of the blade is measured by using the tip timing sensor fixed on the arc mounting seat, and the measured data is compared with the tip displacement of the blade assembly measured by the laser displacement sensor, so that the dynamic calibration of the tip timing sensor of the rotating blade is realized;
2. the invention simulates the vibration of the blade piece through the pneumatic excitation and piezoelectric excitation modes, and overcomes the defects that the blade vibration is simulated through a plurality of vibration tables and the tiny vibration of the rotating blade in the actual process is ignored in the prior art;
3. according to the invention, the test bed base is arranged, the driving motor is arranged on the test bed base, the rotating disc is driven to rotate by the driving motor, the displacement sliding table is correspondingly arranged on one side of the test bed base, and the pneumatic excitation and vibration measurement unit on the displacement sliding table is controlled to adjust the distance between the pneumatic excitation and vibration measurement unit and the rotating disc.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of a dynamic calibration device for a rotating blade tip timing sensor according to the present invention;
FIG. 2 is a schematic view of a blade assembly according to the present invention;
FIG. 3 is a schematic structural diagram of the pneumatic excitation vibration measuring unit of the present invention;
FIG. 4 is a schematic representation of the principle of aerodynamic excitation of the blades of the present invention;
FIG. 5 is a schematic diagram of the structure of piezoelectric excitation and laser vibration measurement of the blade according to the present invention;
reference numerals:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a dynamic calibration device of a rotating blade tip timing sensor, which includes a test bed base 1, a pneumatic excitation vibration measurement unit 21, and a displacement sliding table 19. A driving motor 3 is arranged on the test bed base 1, a rotating main shaft 8 is rotatably arranged on the driving motor 3, and a rotating disk 13 is fixedly arranged at the other end of the rotating main shaft 8.
Be equipped with the blade subassembly on the rotary disk 13, lead electrical slip ring 18 and laser displacement sensor, lead electrical slip ring 18 and set up on rotary disk 13 with rotatory main shaft 8 is coaxial, the blade subassembly is equipped with a plurality ofly, a plurality of blade subassemblies about leading electrical slip ring 18 symmetric distribution on rotary disk 13, laser displacement sensor is equipped with a plurality ofly, a plurality of laser displacement sensor about leading electrical slip ring 18 symmetric distribution on rotary disk 13.
As shown in fig. 2, the blade assembly includes a first blade assembly 14 and a second blade assembly 16, the first blade assembly 14 includes a first blade clamp 22, a second blade clamp 23, and a blade 24, one end of the blade 24 is clamped between the first blade clamp 22 and the second blade clamp 23, and a piezoelectric fiber 25 is adhered to a surface of the blade 24. In the present embodiment, the second vane member 16 is provided in the same configuration as the first vane member 14. The first blade assembly 14 and the second blade assembly 16 are symmetrically disposed about the conductive slip ring 18 along the diameter of the rotating disk 13.
The laser displacement sensor comprises a first laser displacement sensor 15 and a second laser displacement sensor 17, wherein the first laser displacement sensor 15 and the second laser displacement sensor 17 are symmetrically arranged along the diameter of the rotating disk 13 and around the conductive slip ring 18, and the mass center and the centroid on the rotating disk 13 are ensured to be coincident as much as possible. The first laser displacement sensor 15 is disposed corresponding to the tip of the blade 24 of the first blade assembly 14, and the first laser displacement sensor 15 is used for measuring the displacement of the tip of the blade 24 in the first blade assembly 14. The second laser displacement sensor 17 is disposed corresponding to the tip end of the blade 24 of the second blade unit 16, and the second laser displacement sensor 17 is used for measuring the displacement of the tip end of the blade 24 in the second blade unit 16.
As shown in fig. 3, which is a schematic structural diagram of the pneumatic excitation vibration measurement unit, the pneumatic excitation vibration measurement unit 21 includes a pneumatic nozzle piece 30, a tip timing sensor 32, and an arc mounting seat 28, the pneumatic nozzle piece 30 and the tip timing sensor 32 are circumferentially disposed on the arc mounting seat 28, and the arc mounting seat 28 is movably disposed on the displacement sliding table 19. The tip timing sensor 32 may identify vibration information of the tip member 24 in real time, and may perform a comparison analysis with the dynamic measured data acquired by the first laser displacement sensor 15 and the second laser displacement sensor 17, so as to realize a dynamic calibration of the tip timing sensor.
The displacement sliding table 19 is arranged on one side of the test bed base 1, the arc mounting seat 28 is coaxially arranged corresponding to the rotating disc 13, and the pneumatic nozzle piece 30 and the blade tip timing sensor 32 are respectively arranged corresponding to the blade assembly. The adapter plate 20 is arranged on the displacement sliding table 19 in a sliding mode, the pneumatic excitation vibration measurement unit 21 is fixedly arranged on the adapter plate 20, the first fixing base 26 and the second fixing base 27 are arranged below the arc mounting seat 28, the other ends of the first fixing base 26 and the second fixing base 27 are fixedly arranged on the adapter plate 20, the distance between the pneumatic excitation vibration measurement unit 21 and the rotating disk 13 can be adjusted by controlling the displacement sliding table 19, and system installation, operation and maintenance are facilitated. The pneumatic nozzle piece 30 is fixedly arranged on the arc mounting seat 28 through a pneumatic nozzle mounting seat 29, and the blade tip timing sensor 32 is fixedly arranged on the arc mounting seat 28 through a sensor mounting seat 31.
The driving motor 3 is connected with the rotating main shaft 8 through a coupling 5, and a first bearing part 7 and a second bearing part 12 are sleeved on the rotating main shaft 8. Be equipped with motor base 2, first bearing base 6 and second bearing base 11 on the test bench base 1, motor base 2, first bearing base 6 and second bearing base 11 set gradually at test bench base 1, and first bearing part 7 is fixed to be set up on first bearing base 6, and second bearing part 12 is fixed to be set up on second bearing base 11. The first bearing base 6 and the second bearing base 11 support the rotary main shaft 8.
A sensor support 9 is fixedly arranged on the test bed base 1, a rotating speed synchronous sensor 10 is fixedly arranged on the sensor support 9, the rotating speed synchronous sensor 10 is arranged corresponding to the rotating main shaft 8, and the rotating speed of the rotating main shaft 8 is monitored in real time through the rotating speed synchronous sensor 10. A frequency converter 4 is fixedly arranged on the test bed base 1, the frequency converter 4 is connected with the driving motor 3, and the frequency converter 4 is used for controlling the driving motor 3 to move at a fixed rotating speed or a variable rotating speed.
As shown in fig. 4, which is a schematic diagram of the principle of pneumatic excitation of the vane, the plurality of pneumatic nozzle pieces 30 are respectively connected to a flow divider, the flow divider is connected to a filter, the filter is connected to an air storage tank through an air pressure valve, and the air storage tank is connected to an air compressor.
As shown in fig. 5, which is a schematic structural diagram of piezoelectric excitation and laser vibration measurement of a blade, the blade assembly is electrically connected to the conductive slip ring 18, the conductive slip ring 18 is electrically connected to a signal acquisition instrument, the conductive slip ring 18 is electrically connected to a power amplifier and a power supply, the power amplifier is connected to a signal generator, and the signal acquisition instrument is connected to an upper computer.
The working principle is as follows: the blade 24 is made to vibrate by means of pneumatic and piezoelectric excitations, the pneumatic excitations comprising in particular the following operations: outside air enters the air storage tank through the air compressor, the air pressure of the air flowing out of the air storage tank is controlled by the air pressure valve, the air is dried by the filter, the dried air is divided to the plurality of pneumatic nozzles 30 by the divider, and the air is sprayed to the blade pieces 24 through the pneumatic nozzles 30 to form pneumatic loads.
The signal generator outputs the simple harmonic signal to the power amplifier, the power amplifier and the conductive slip ring 18 convert the simple harmonic signal into voltage and output the voltage to the piezoelectric fiber sheet 25 on the surface of the blade piece 24, and the blade piece 24 generates vibration by utilizing the inverse piezoelectric effect of the piezoelectric material.
The power supply supplies power to the first laser displacement sensor 15 and the second laser displacement sensor 17 through the conductive sliding ring 18, adjusts the positions of the first laser displacement sensor 15 and the second laser displacement sensor 17 to measure the tip displacement of the blade 24, outputs a displacement signal of the blade 24 to the signal acquisition instrument through the conductive sliding ring 18, and finally outputs the displacement signal of the blade 24 to the upper computer through the signal acquisition instrument.
According to the invention, the blade piece 24 and the laser displacement sensor are fixedly arranged on the rotating disk 13, the vibration of the blade piece 24 is simulated through pneumatic excitation or piezoelectric excitation, the tip displacement of the rotating blade piece 24 is measured by using the laser displacement sensor, and the tip displacement of the blade piece 24 measured by the blade tip timing sensor 32 is compared with data measured by the laser sensor, so that the dynamic calibration of the rotating blade tip timing sensor 32 is realized, and the measurement error caused by ideally considering the blade as not vibrating in the prior art is avoided.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A dynamic calibration device for a rotating blade tip timing sensor is characterized by comprising a test bed base (1), a pneumatic excitation vibration measurement unit (21) and a displacement sliding table (19);
a driving motor (3) is arranged on the test bed base (1), a rotating main shaft (8) is rotatably arranged on the driving motor (3), and a rotating disc (13) is fixedly arranged at the other end of the rotating main shaft (8);
the rotating disk (13) is provided with a plurality of blade assemblies, a conductive sliding ring (18) and laser displacement sensors, the conductive sliding ring (18) and the rotating main shaft (8) are coaxially arranged on the rotating disk (13), the plurality of blade assemblies are symmetrically distributed on the rotating disk (13) about the conductive sliding ring (18), the plurality of laser displacement sensors are symmetrically distributed on the rotating disk (13) about the conductive sliding ring (18);
the pneumatic excitation vibration measurement unit (21) comprises a pneumatic spray head piece (30), a blade tip timing sensor (32) and an arc mounting seat (28), the pneumatic spray head piece (30) and the blade tip timing sensor (32) are circumferentially arranged on the arc mounting seat (28), and the arc mounting seat (28) is movably arranged on the displacement sliding table (19);
displacement slip table (19) set up one side of test bench base (1), circular arc mount pad (28) correspond rotary disk (13) coaxial setting, pneumatic shower nozzle spare (30) with apex timing sensor (32) correspond respectively the blade subassembly sets up.
2. The dynamic calibration device for the rotating blade tip timing sensor according to claim 1, wherein the driving motor (3) and the rotating spindle (8) are connected through a coupling (5), and a first bearing (7) and a second bearing (12) are sleeved on the rotating spindle (8).
3. The dynamic calibration device for the rotating blade tip timing sensor according to claim 2, wherein a motor base (2), a first bearing base (6) and a second bearing base (11) are arranged on the test bed base (1), the motor base (2), the first bearing base (6) and the second bearing base (11) are sequentially arranged on the test bed base (1), the first bearing member (7) is fixedly arranged on the first bearing base (6), and the second bearing member (12) is fixedly arranged on the second bearing base (11).
4. The dynamic calibration device for the rotating blade tip timing sensor according to claim 1, wherein the blade assembly comprises a first blade assembly (14) and a second blade assembly (16), the first blade assembly (14) comprises a first blade clamp (22), a second blade clamp (23) and a blade (24), one end of the blade (24) is clamped between the first blade clamp (22) and the second blade clamp (23), and a piezoelectric fiber sheet (25) is adhered to the surface of the blade (24);
the second vane assembly (16) is arranged in the same structure as the first vane assembly (14);
the first blade assembly (14) and the second blade assembly (16) are symmetrically arranged about the electrically conductive slip ring (18) along the diameter of the rotating disc (13).
5. The dynamic calibration device for the rotating blade tip timing sensor according to claim 1, wherein an adapter plate (20) is slidably arranged on the displacement sliding table (19), the pneumatic excitation vibration measurement unit (21) is fixedly arranged on the adapter plate (20), a first fixing base (26) and a second fixing base (27) are arranged below the arc mounting seat (28), the other ends of the first fixing base (26) and the second fixing base (27) are fixedly arranged on the adapter plate (20), the pneumatic nozzle piece (30) is fixedly arranged on the arc mounting seat (28) through a pneumatic nozzle mounting seat (29), and the tip timing sensor (32) is fixedly arranged on the arc mounting seat (28) through a sensor mounting seat (31).
6. The dynamic calibration device for the rotating blade tip timing sensor according to claim 4, wherein the laser displacement sensor comprises a first laser displacement sensor (15) and a second laser displacement sensor (17), the first laser displacement sensor (15) and the second laser displacement sensor (17) are symmetrically arranged along the diameter of the rotating disk (13) with respect to the conductive slip ring (18), the first laser displacement sensor (15) is arranged corresponding to the tip of the blade (24) of the first blade assembly (14), and the second laser displacement sensor (17) is arranged corresponding to the tip of the blade (24) of the second blade assembly (16).
7. The dynamic calibration device for the rotating blade tip timing sensor according to claim 1, wherein a sensor support (9) is fixedly arranged on the test bed base (1), a rotating speed synchronous sensor (10) is fixedly arranged on the sensor support (9), the rotating speed synchronous sensor (10) is arranged corresponding to the rotating main shaft (8), a frequency converter (4) is fixedly arranged on the test bed base (1), and the frequency converter (4) is connected with the driving motor (3).
8. The dynamic calibration device for the rotating blade tip timing sensor according to claim 1, wherein a plurality of the pneumatic nozzle members (30) are respectively connected to a flow divider, the flow divider is connected to a filter, the filter is connected to an air storage tank through an air pressure valve, and the air storage tank is connected to an air compressor.
9. The dynamic calibration device for the rotating blade tip timing sensor according to claim 8, wherein the blade assembly is electrically connected to the conductive slip ring (18), the conductive slip ring (18) is electrically connected to a signal collector, the conductive slip ring (18) is electrically connected to a power amplifier and a power supply, the power amplifier is connected to a signal generator, and the signal collector is connected to an upper computer.
10. The dynamic calibration device of a rotating blade tip timing sensor according to claim 9, characterized in that said blade element (24) is vibrated by pneumatic and piezoelectric excitation, said pneumatic excitation comprising in particular the following operations: the external air enters the air storage tank after passing through the air compressor, the air pressure valve controls the air pressure of the gas flowing out of the air storage tank, the filter dries the gas, the flow divider divides the dried gas to a plurality of pneumatic nozzles (30), and the gas is sprayed onto the blade parts (24) through the pneumatic nozzles (30) to form pneumatic loads;
the signal generator outputs a simple harmonic signal to the power amplifier, the power amplifier and the conductive slip ring (18) convert the simple harmonic signal into a voltage and output the voltage to a piezoelectric fiber sheet (25) on the surface of the blade piece (24), and the blade piece (24) generates vibration by utilizing the inverse piezoelectric effect of a piezoelectric material;
the power supply supplies power to the first laser displacement sensor (15) and the second laser displacement sensor (17) through the conductive sliding ring (18), adjusts the positions of the first laser displacement sensor (15) and the second laser displacement sensor (17) to measure the tip displacement of the blade (24), outputs displacement signals of the blade (24) to the signal acquisition instrument through the conductive sliding ring (18), and finally outputs the displacement signals of the blade (24) to an upper computer through the signal acquisition instrument.
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| CN202111107718.7A CN113959556B (en) | 2021-09-22 | 2021-09-22 | Dynamic calibration device for rotating blade tip timing sensor |
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| CN202111107718.7A CN113959556B (en) | 2021-09-22 | 2021-09-22 | Dynamic calibration device for rotating blade tip timing sensor |
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