CN208723103U - A kind of engine dynamic stress signal telemetry device - Google Patents
A kind of engine dynamic stress signal telemetry device Download PDFInfo
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- CN208723103U CN208723103U CN201821417069.4U CN201821417069U CN208723103U CN 208723103 U CN208723103 U CN 208723103U CN 201821417069 U CN201821417069 U CN 201821417069U CN 208723103 U CN208723103 U CN 208723103U
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Abstract
The utility model relates to a kind of engine dynamic stress signal telemetry devices, including multiple transmitters being distributed on rotor, it is fixed on the transmitting antenna rotated on rotor with rotor, the receiving antenna being fixed on stator, the foil gauge being attached on engine rotor blade, power splitter and receiver, the transmitting antenna includes medium substrate, the micro-strip dipole antenna of ground level and multiple groups different operating frequency point, every group of micro-strip dipole antenna includes being located at microstrip feed line and radiation patch, microstrip feed line is used to feed to radiation patch, radiation patch and the Design of length of microstrip feed line are at half working frequency points wavelength, the overlay region Design of length of the two is at a quarter working frequency points wavelength；Receiving antenna uses loaded ring antenna structure.The utility model can prevent interchannel crosstalk and channel fading.
Description
Technical field
The utility model relates to a kind of engine dynamic stress signal telemetry devices.
Background technique
Aero-engine, gas turbine are the core mechanical components of the great key equipment such as national defence aircraft, naval vessel,
In, start movable blade work under the bad working environments environment such as high temperature, high pressure, high revolving speed, during daily production run, leaf
Piece fracture defect is especially prominent, once leaf destruction occurs, can bring serious economic loss and safety accident.In engine reality
Under the working condition of border, by the factors shadow such as the connection rigidity of movable vane piece and wheel disc, engine centrifugal power, internal temperature and air-flow power
It rings, dynamic frequency (natural frequency of vibration) of the blade under rotation status and the quiet frequency under non-rotating state are different, therefore pass through measurement
The dynamic stress signal of engine rotor blade can effectively monitor movable vane piece working condition and operational safety in real time.
On the one hand, high temperature, high pressure, high-revolving working condition, traditional contact are in during normal working of engine
Formula dynamic stress Signal Measurement System using slip ring realize power supply and data transmission, this method service life is extremely low, to engine structure into
It has gone change, engine operational safety hidden danger is significantly greatly increased.
On the other hand, contactless rotor blade dynamic stress Signal Measurement System is also known as engine rotor blade dynamic stress
Signal telemetry system.Telemetering refers to the parameter of measurand outside certain distance, by experiencing, acquiring, is sent by transmission medium
To a kind of measurement process for receiving place and being demodulated, recorded, being handled.Non-contact data real-time transmission system can be divided into sense
Answer formula, infrared type and wireless digital.Wherein, induction type data transfer mode be based on electromagnetic coupling principle, carrier frequency by
To the limitation of magnetic core cutoff frequency, it is difficult to meet high speed data transfer requirement；Infrared type data transfer mode is made using infrared ray
For carrier, it is only suitable for the data transmission of short distance, low-angle, accessible occasion, and is not suitable for severe Service Environment；Without line number
Word formula data transfer mode is widely used in high speed rotation wireless communication system, has the characteristics that short distance low-power consumption.
In another aspect, engine dynamic stress signal telemetry device is located at the part of a rotating body, reception and transmitting module
It is rotated with shaft, the radiation directivity of antenna can do the rotation of approximate circumference, therefore, the design of wireless data transmission antenna with axis
" Doppler effect " caused by relative motion and " shadow effect " need to be solved, and prevents interchannel crosstalk and channel fading.
Utility model content
In view of the above-mentioned problems, the utility model design it is a kind of can prevent interchannel crosstalk and channel fading start it is motor-driven
Stress signal telemetering equipment, the wireless data transmission antenna that the utility model uses, including transmitting antenna and receiving antenna two
Point, the dynamic stress signal data transmission suitable for short range within 10mm between engine rotor part and stator part.The utility model
Technical solution it is as follows:
A kind of engine dynamic stress signal telemetry device, including multiple transmitters being distributed on rotor, is fixed on rotor
On the transmitting antenna, the receiving antenna being fixed on stator, the strain that is attached on engine rotor blade that are rotated with rotor
Piece, power splitter and receiver, the transmitting antenna include that the micro-strip of medium substrate, ground level and multiple groups different operating frequency point is even
Pole sub-antenna, which is characterized in that
Every group of micro-strip dipole antenna includes being located at microstrip feed line and radiation patch, and microstrip feed line is used to present to radiation patch
The Design of length of electricity, radiation patch and microstrip feed line at half working frequency points wavelength, the overlay region Design of length of the two at
A quarter working frequency points wavelength；Receiving antenna uses loaded ring antenna structure, including metallic conductor ring, loading resistor and plane
Reflecting plate, metallic conductor ring are metal pipe structure, and metallic conductor ring is divided into two semi-rings, loaded in series electricity among two semi-rings
Resistance, resistance are equal to the average characteristics impedance of metallic conductor ring, and both ends are feed ends, and plane-reflector is placed in metallic conductor ring
Behind, to improve antenna in the directivity factor in the direction θ=0, the direction θ=0 be perpendicular to plane-reflector, it is anti-by plane
Penetrate the direction that plate is directed toward metallic conductor ring；The spacing of metallic conductor ring and plane-reflector is set as λ≤0.2 0.05≤d/,
Middle d is distance of the plane-reflector away from metallic conductor ring, and λ is the wavelength of receiving antenna working frequency points；
The each group micro-strip dipole antenna of transmitting antenna is connect by transmission cable with transmitter, and receiving antenna passes through difference
Two-wire is connect with power splitter, and power splitter is connect with receiver, and the dynamic strain signal of foil gauge measurement is transferred to hair by transmission cable
It penetrates machine, after emitted machine modulating-coding, is emitted by transmitting antenna, signal is distributed to through power splitter after receiving antenna reception and is connect
Each channel of receipts machine carries out signal decoding demodulation.
The substantive distinguishing features of the utility model are: transmitting antenna uses micro-strip dipole antenna structure, has high gain, effect
The high performance of rate can meet multiple channels respectively aerial band width and tune by designing suitable transmitting antenna single-frequency point bandwidth
The requirement of frequency point separation processed, effectively avoids interchannel crosstalk；Receiving antenna uses loaded ring antenna structure, has with wide, biography
The small performance of defeated loss, guarantees that in transmitter, antenna transmission coefficient keeps almost the same in armature spindle high-speed rotation
It is required that realizing the high-speed transfer of high-transmission coefficient rotational telemetry signal, channel fading is effectively avoided.Have compared with prior art
Following advantages: overcome that traditional slip ring contact dynamic stress Signal Measurement System service life is extremely low, Yi Zengjia engine operational safety
Hidden danger, and in existing contactless dynamic stress Signal Measurement System, induction type data transfer mode is difficult to realize high-speed data
The shortcomings that transmission, infrared type data transfer mode is not suitable for severe Service Environment, proposes that engine dynamic stress signal can be achieved
The wireless data transmission antenna of telemetering, which matches with telemetry system transmitter and receiver, it can be achieved that ring of being badly on active service
Border lower high life, short distance, low-power consumption, stabilization, the dynamic stress telemetered signal high-speed transfer of high-transmission signal-to-noise ratio.
Detailed description of the invention
Fig. 1 shows the micro-strip dipole antenna structural schematic diagram of the utility model.
Fig. 2 shows the single channel transmitting antenna reflection coefficient schematic diagrames of the utility model.
Fig. 3 shows the loaded ring antenna structure view of the utility model.
Fig. 4 shows the receiving antenna reflection coefficient schematic diagram of the utility model.
Fig. 5 shows the engine dynamic stress signal telemetry apparatus structure schematic diagram of the utility model.
Figure label explanation: 0 is micro-strip dipole antenna；1 is radiation patch；2 be microstrip feed line (also known as coupling line)；
3 be medium substrate；4 be ground level；5 is load loop antenna, and 6 be metallic conductor ring, and 7 be loading resistor, and 8 be plane-reflector；9
It is foil gauge for engine rotor, 10,11 be transmission cable, and 12 be transmitter, and 13 be transmitting antenna, and 14 be rotor loop antenna
Slot, 15 be receiving antenna, and 16 be stator loop antenna slot, and 17 be power splitter, and 18 be receiver, and 19 be peripheral equipment.
Specific embodiment
The utility model is illustrated with reference to the accompanying drawings and examples.
The utility model designs a kind of wireless data transmission antenna of achievable engine dynamic stress signal telemetry, including hair
Antenna and receiving antenna two parts are penetrated, on this basis, further devises the entirety of engine dynamic stress signal telemetry device
Structure.
(1) transmitting antenna:
As shown in Figure 1, transmitting antenna 13 uses multiple 0 structures of micro-strip dipole antenna, micro-strip dipole antenna 0 includes spoke
Penetrating patch 1, microstrip feed line (also known as coupling line) 2, medium substrate 3 and ground level 4, radiation patch 1 is metal material, is located at and is situated between
3 upper surface of matter substrate, microstrip feed line 2 are metal materials, are located inside medium substrate 3, and ground level 4 is metal material, are located at and are situated between
3 lower surface of matter substrate, medium substrate 3 use printed circuit board (PCB) common sheet material, and the width of radiation patch 1 is by turning
The limitation of subring size, be designed to it is equal with the width of microstrip feed line 2, microstrip feed line 2 be used to give radiation patch 1 feed, radiation
The Design of length of patch 1 and microstrip feed line 2 is at half working frequency points wavelength, the overlay region of radiation patch 1 and microstrip feed line 2
Design of length is at a quarter working frequency points wavelength, radiation patch 1 and the bending radius of microstrip feed line 2, the thickness of medium substrate 3
It can be adjusted according to actual installation condition, antenna performance is not impacted.
By adjusting the width of radiation patch 1, between 2 liang of bands of radiation patch 1 and microstrip feed line the thickness of substrate or
Microstrip feed line 2 is biased in width direction, so that the overlapping area for changing microstrip feed line 2 and radiation patch 1 can adjust micro-strip dipole
The input impedance of sub-antenna 0.
Transmitting antenna 13 uses coaxial feeding mode, and coaxial inner conductor passes through medium substrate and connects on microstrip feed line 2,
Coaxial line shielded layer is connect with 3 bottom surface ground level 4 of medium substrate, realizes the excitation to antenna；
Transmitting antenna 13 belongs to patch antenna type, and the environment of 100MHz, each micro-strip are higher than suitable for driving frequency
Dipole antenna 0 corresponds to a transmission channel, the corresponding working frequency points of each transmission channel, as shown in Fig. 2, microstrip dipole
0 single-frequency point narrow bandwidth of antenna, only 40MHz, can meet the requirement of multiple transmission channel modulation frequency point separation, effectively avoid interchannel
Crosstalk has the characteristics that high gain, high-efficient.
(2) receiving antenna:
As shown in figure 3, receiving antenna 15 is using load 5 structure of loop antenna, including metallic conductor ring 6,7 peace of loading resistor
Face reflecting plate 8, metallic conductor ring 6 are metal pipe structures, and conductor ring diameter a and metal pipe diameter b can be according to actual installation items
Part setting, 6 both ends of metallic conductor ring are feed ends, and 6 dimidiation of metallic conductor ring, average characteristic impedance is approximately Z=
120lnba, the loading resistor 7 of centre series connection special value, resistance are equal to the average characteristics impedance of metallic conductor ring 6, gold
Belonging to the plane-reflector 8 that conductor loop 6 is placed behind can be improved antenna in the directivity factor in the direction θ=0；The direction θ=0 is vertical
In plane-reflector 8, the direction of metallic conductor ring 6 is directed toward by reflecting plate；Plane-reflector 8 is metal material.
Metallic conductor ring 6 by access loading resistor 7, two semicircular rings can outside radiated electromagnetic wave, along the electric current point of ring
Cloth is travelling wave current, has one-way radiation, and frequency band is wider.Metallic conductor ring 6 and the spacing of plane-reflector 8 are set as
λ≤0.2 0.05≤d/, wherein d is distance of the plane-reflector 8 away from metallic conductor ring 6, and λ is the wave of working frequency points
Long, which meets the requirement of 15 all working frequency point corresponding wavelength of receiving antenna, receiving antenna can be improved at this time
Directivity factor.
Receiving antenna 15 uses difference dual feed mode, and two differential lines are respectively connected to two feedbacks of metallic conductor ring 6
The excitation to antenna is realized in electric port.
Receiving antenna 15 belongs to loop antenna type, is applicable to the received environment of broader frequency spectrum, as shown in figure 4, receiving
Antenna 15 has broadband character, and bandwidth covers 1GHz-3GHz, has high-gain in the direction θ=0.
(3) installation site:
Relative mounting location and the engine dynamic stress signal for being illustrated in figure 5 transmitting antenna 13 and receiving antenna 15 are distant
Apparatus structure schematic diagram is surveyed, transmitting antenna 13 is mounted in rotor ring antenna slot 14, and rotor ring antenna slot 14 and transmitter 12 are pacified
It being rotated on engine rotor 9 with engine rotor 9, rotor ring antenna slot 14 is overlapped with the central axis of engine rotor 9,
Receiving antenna 15 is mounted in stator loop antenna slot 16, and the center of engine rotor 9 is directed toward in the direction θ=0 of receiving antenna 15, is put down
The mountable back side in stator loop antenna slot 16 of face reflecting plate 8 or the inside for being embedded in stator loop antenna slot 16, stator loop antenna slot
16 stationary in engine working process and rotor ring antenna slots 14 are docked using shaft end face or shaft radial abutment shape
The central axis of formula, stator loop antenna slot 16 and rotor ring antenna slot 14 is overlapped, and is guaranteed in engine rotary course, and day is received
Always face transmitting antenna, stator loop antenna slot 16 and rotor ring antenna slot 14 use insulating materials, such as plastics, timber to line.
Transmitting antenna 13 is connect by transmission cable 11 with transmitter 12, and receiving antenna 15 passes through difference two-wire and power splitter
17 connections, power splitter 17 are connect with receiver 18, and foil gauge 10 is attached on the blade of 9 leaf dish of engine rotor, and foil gauge 10 is surveyed
The dynamic strain signal of amount is transferred to transmitter 12 by transmission cable 11, after emitted 12 modulating-coding of machine, is sent out by transmitting antenna 13
Penetrate, receiving antenna 15 receive, after through power splitter 17 by signal averaging distribute to receiver 18 each channel carry out signal solution
Code demodulation, decoded signal are output to peripheral equipment 19 from receiver 18.
Micro-strip dipole antenna 0 all the way is accessed in each channel of transmitter 12, and transmitting antenna 13 is by multipath microstrip dipole
Antenna 0 forms, and the number of micro-strip dipole antenna 0 is determined by the number of transmitter channels.For example, certain engine dynamic stress signal
Telemetering equipment transmitter 12 shares 8 channels, and micro-strip dipole antenna 0,8 road micro-strip dipole antenna 0 in external 8 road is in rotor altogether
The arrangement of 14 inner periphery of loop antenna slot, forms the transmitting antenna 13 of telemetry system.All channels of receiver 18 are external one common
The receiving antenna 15 of 5 structure type of loop antenna is loaded, which accesses after power splitter 17 carries out power averaging distribution
Each channel of receiver 18.For example, certain engine dynamic stress signal telemetry device receiver 18 shares 8 channels, day is received
Line 15 is divided into each channel of 8 road signals access receiver 18 after power splitter 17 carries out power averaging distribution.
Claims (1)
1. a kind of engine dynamic stress signal telemetry device, including multiple transmitters being distributed on rotor, is fixed on rotor
The transmitting antenna that is rotated with rotor, the receiving antenna being fixed on stator, the foil gauge being attached on engine rotor blade,
Power splitter and receiver, the transmitting antenna include the micro-strip dipole of medium substrate, ground level and multiple groups different operating frequency point
Sub-antenna, which is characterized in that
Every group of micro-strip dipole antenna includes being located at microstrip feed line and radiation patch, and microstrip feed line is used to feed to radiation patch,
Radiation patch and the Design of length of microstrip feed line are at half working frequency points wavelength, the overlay region Design of length Cheng Sifen of the two
One of working frequency points wavelength；Receiving antenna uses loaded ring antenna structure, including metallic conductor ring, loading resistor and plane reflection
Plate, metallic conductor ring are metal pipe structure, and metallic conductor ring is divided into two semi-rings, loaded in series resistance among two semi-rings, electricity
The average characteristics impedance that resistance value is equal to metallic conductor ring is hindered, both ends are feed ends, and plane-reflector is placed in the back of metallic conductor ring
Afterwards, to improve antenna in the directivity factor in the direction θ=0, the direction θ=0 is perpendicular to plane-reflector, by plane-reflector
It is directed toward the direction of metallic conductor ring；The spacing of metallic conductor ring and plane-reflector is set as λ≤0.2 0.05≤d/, and wherein d is
Distance of the plane-reflector away from metallic conductor ring, λ are the wavelength of receiving antenna working frequency points；
The each group micro-strip dipole antenna of transmitting antenna is connect by transmission cable with transmitter, and receiving antenna passes through difference two-wire
It being connect with power splitter, power splitter is connect with receiver, and the dynamic strain signal of foil gauge measurement is transferred to transmitter by transmission cable,
After emitted machine modulating-coding, emitted by transmitting antenna, signal is distributed into receiver through power splitter after receiving antenna reception
Each channel carry out signal decoding demodulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821417069.4U CN208723103U (en) | 2018-08-31 | 2018-08-31 | A kind of engine dynamic stress signal telemetry device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821417069.4U CN208723103U (en) | 2018-08-31 | 2018-08-31 | A kind of engine dynamic stress signal telemetry device |
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| Publication Number | Publication Date |
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| CN208723103U true CN208723103U (en) | 2019-04-09 |
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| CN201821417069.4U Active CN208723103U (en) | 2018-08-31 | 2018-08-31 | A kind of engine dynamic stress signal telemetry device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193178A (en) * | 2018-08-31 | 2019-01-11 | 天津大学 | A kind of engine dynamic stress signal telemetry system |
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2018
- 2018-08-31 CN CN201821417069.4U patent/CN208723103U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193178A (en) * | 2018-08-31 | 2019-01-11 | 天津大学 | A kind of engine dynamic stress signal telemetry system |
| CN109193178B (en) * | 2018-08-31 | 2023-09-26 | 天津大学 | Engine dynamic stress signal telemetry system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210105 Address after: 300382 office building 451-04, Xiqing Xuefu Industrial Park Management Committee, Xiqing District, Tianjin Patentee after: SMARTMENS (TIANJIN) TECHNOLOGY Co.,Ltd. Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Tianjin University |