CN107576956A - A kind of damage reason location system of the forward and reverse detection of fluorescence optical fiber - Google Patents
A kind of damage reason location system of the forward and reverse detection of fluorescence optical fiber Download PDFInfo
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- CN107576956A CN107576956A CN201710637387.5A CN201710637387A CN107576956A CN 107576956 A CN107576956 A CN 107576956A CN 201710637387 A CN201710637387 A CN 201710637387A CN 107576956 A CN107576956 A CN 107576956A
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- optical fiber
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Abstract
A kind of damage reason location system of the forward and reverse detection of fluorescence optical fiber, including fluorescence optical fiber perceive unit, photoelectric processing unit, damage reason location processing unit.Fluorescence optical fiber coated with piezallochromy gathering induced luminescence material is arranged in measured target and forms fluorescence optical fiber perception unit；Measured target is by after external impact or shock, and the molecular entergy level of fluorescence optical fiber is horizontal and luminescent spectrum changes, and produces piezoluminescence；Optical signal caused by fluorescence optical fiber is received by photoelectric processing unit, and the optical signal received is converted to electric signal by photoelectric processing unit, is handled, and obtains fluorescence decay time, and export and give damage reason location processing unit；Damage reason location processing unit is by reaching time difference at same coding fluorescence optical fiber both ends photoelectric processing unit both ends, and the unique characteristic of orthogonal fluorescence optical fiber intersection point obtains the coordinate of damage position.The present invention realizes impact damage positioning monitoring in real time, using unglazed source forcing system, simplifies system architecture.
Description
Technical field
The invention belongs to field of measuring technique, is related to a kind of damage reason location system.
Background technology
With the development of information technology and the rise of New military transform, the fighting efficiency of weaponry is by countries in the world weight
Depending on.The purpose of weapons equipment test training is identification and the fighting efficiency for assessing armament systems, and precision and damage effectiveness quantify
Assess, depend on the hitting information of acquisition.
For a long time, aircraft test effect is assessed, mainly using technologies such as optical imagery, photoelectric tracking, radar trackings
Means implement measurement of missing the target.Above-mentioned measuring method of missing the target can only be made whether to intercept successful qualitative judgement, can not obtain in real time
The information such as damage position, damaged area and process, it is difficult to qualitative assessment impact damage effect.
Due to aircraft by when hitting apart from ground telemetering station farther out, and the effect of impact time is extremely short, using remote measurement
Impact damage position and effect can not be observed and determined to means, can only be by means of the self-contained fault localization system of aircraft.
Impact damage detection system is applied to the in-orbit perception field of impact from space debris more at present, carries out impingement position measurement and injures effect
Fruit is assessed, more ripe technical measures such as electromagnetic radiation technology, acoustic emission, resistance film detection technique, poly- inclined fluorine
Ethene (PVDF) piezoelectric membrane is exactly, capacitance sensing detection technique etc., is based on electrical sensor and builds impact damage detection system
System.Because the crushing effect of impact time is extremely short, cause aircraft and impact damage detection system life span extremely short, in order to and
When gather impingement position information, it is desirable in more than 10MHz, this is one and huge chosen sensor response frequency to electrical sensor
War, in addition, knockout process can produce strong electromagnetic interference, easily causes electrical sensor to fail.Therefore, sensed using electric class
Device is difficult to realize aircraft fault localization when destructiveness is hit.
Due to optical fiber have small volume, light weight, intensity height, good bandability, pliability it is good, not by Electromagnetic Interference, no
Need additional power source, it is corrosion-resistant, be easy to be embedded to structure, establish monitoring grid, low cost and other advantages, so its sensor application lead
Domain is quite extensive, and existing researcher is applied to aircraft impact damage detection system.
Alignment sensor generally existing cost of the prior art is high, resolution speed is slow, is unable to reach the measurement of low-power consumption
It is required that mainly for the crushing or non-crushing fault localization for hitting single operating mode, can not the two take into account.
The content of the invention
The technology of the present invention solves problem：Overcome the deficiencies in the prior art, there is provided a kind of forward and reverse detection of fluorescence optical fiber
Damage reason location system, using the fluorescence optical fiber piezoluminescence characteristic of special coating, adapt to the impingement position under the conditions of external force collision
Measurement demand (destructive and non-destructive)；Realize that impact damage dynamic process monitors in real time；Using unglazed source forcing system, letter
Change system architecture, reduce system cost and power consumption.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of forward and reverse detection of fluorescence optical fiber
Damage reason location system, including：Fluorescence optical fiber perceives unit, photoelectric processing unit, damage reason location processing unit；Fluorescence optical fiber perceives
Unit is arranged in measured target surface and is fixed；Fluorescence optical fiber perceives unit sensitivity and applied to the outside suffered by measured target
The power added, produce pressure and cause optical signal, and pressure is caused into optical signal transmission to photoelectric processing unit；Photoelectric processing unit causes light letter to pressure
Number handled, obtain fluorescence decay time, and export to damage reason location processing unit；Damage reason location processing unit causes according to pressure
Optical signal reaches the coordinate of the time difference acquisition damage position of same coding fluorescence optical fiber both ends photoelectric processing unit.
The fluorescence optical fiber, which perceives unit, includes horizontal k roots fluorescence optical fiber, longitudinal m roots fluorescence optical fiber, and fluorescence optical fiber is in length and breadth
Orthogonal formation optical fiber lattice, each vertical or horizontal fluorescence optical fiber are composed of fixed coding, and fluorescence optical fiber causes coated with pressure
Change colour gathering induced luminescence material, wherein, k is positive integer, and m is positive integer.
The photoelectric processing unit includes photoelectric processing device, and every fluorescence optical fiber both ends connect a photoelectric processing respectively
Device；Photoelectric processing device includes：Photoelectric conversion module, amplifier, A/D modular converters, dsp chip；Photoelectric conversion module will receive
To pressure cause fluorescence signal be converted into electric signal, send to amplifier；Amplifier is amplified to the electric signal received, and is passed
Transport to A/D modular converters；After A/D modular converters convert electrical signals to data signal, dsp chip is transferred to；Dsp chip is first
Fast Fourier Transform (FFT) is carried out to data signal, selection draws the spectral term of frequency spectrum, and obtains the argument or width of corresponding frequency spectrum spectral term
Tangent of an angle value, the tangent value of argument or argument further according to spectral term calculate pressure and cause fluorescence corresponding to the attenuation curve of optical signal to decline
Fall the time, according to fluorescence decay time judge the road fluorescence optical fiber whether stress or Damage and Fracture.
The damage reason location processing unit is reached positioned at same root longitudinal direction fluorescence optical fiber both ends according to piezoluminescence signal
Time difference, obtain the length l of fluorescence optical fiber reference edge of the forced position of corresponding longitudinal fluorescence optical fiber to longitudinal direction1, and according to
Piezoluminescence signal reaches the time difference positioned at the horizontal fluorescence optical fiber both ends of same root, obtains corresponding horizontal fluorescence optical fiber
Length l of the forced position to the fluorescence optical fiber reference edge of transverse direction2, wherein, set either end in longitudinal fluorescence optical fiber both ends
For the fluorescence optical fiber reference edge of longitudinal direction, either end in horizontal fluorescence optical fiber both ends is set as horizontal fluorescence optical fiber benchmark
End；The one-to-one relationship of each intersection point and measured target surface location of unit optical fiber lattice is perceived according to fluorescence optical fiber, it is determined that
Measured target damage position.
Length l of the forced position of longitudinal fluorescence optical fiber to the fluorescence optical fiber reference edge of longitudinal direction1Calculation formula
It is as follows：
Wherein, L1To be arranged in the length of longitudinal fluorescence optical fiber of measured target, Δ t1Reached for piezoluminescence signal vertical
To the fluorescence optical fiber other end and reach longitudinal direction fluorescence optical fiber reference edge time difference, c be light in a vacuum propagation speed
Degree, n are the refractive index of sensor fibre fibre core.
Length l of the forced position of the horizontal fluorescence optical fiber to the fluorescence optical fiber reference edge of transverse direction2Calculation formula
It is as follows：
Wherein, L2To be arranged in the length of the horizontal fluorescence optical fiber of measured target, Δ t2Reached for piezoluminescence signal horizontal
To the fluorescence optical fiber other end and reach the time difference of horizontal fluorescence optical fiber reference edge.
The present invention compared with prior art the advantages of be：
(1) present system compared with prior art, based on the fluorescence coated with piezallochromy gathering induced luminescence material
Fiber-optic probe, which is realized, to be measured the destructive at the high-speed impact position of aircraft and non-destructive, and hits condition in non-destructive
It is lower to can be achieved that measurement is repeated several times.
(2) present system compared with prior art, same coding fluorescence optical fiber both ends light is reached by detecting optical signal
The time difference of the positive and negative both direction of electric treatment unit, and the unique characteristic of orthogonal fluorescence optical fiber intersection point obtain the seat of damage position
Mark.
(3) present system compared with prior art, by fluorescence analysis caused by external force collision piezoluminescence, obtaining
Fluorescence decay time, realize the damage position positioning of measured target.
(4) present system compared with prior art, using unglazed source forcing system, reduces light in conventional optical systems
The use of the optics such as source, coupler, simplifies system architecture, reduces system cost and power consumption.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the damage reason location system of the forward and reverse detection of fluorescence optical fiber in the present invention；
Fig. 2 is photoelectric processing device composition frame chart of the present invention；
Fig. 3 is a kind of damage reason location system flow chart of the forward and reverse detection of fluorescence optical fiber of the present invention.
Embodiment
The damage that the present invention proposes a kind of forward and reverse detection of fluorescence optical fiber for aircraft impingement position measurement demand is determined
Position system, realizes that aircraft impact damage dynamic process monitors in real time, and suitable for the destructive under the conditions of external force collision and non-
Destructive impingement position measurement demand, compared with existing impingement position e measurement technology, effectively realize impact damage dynamic
Process monitors in real time, simplifies system architecture, reduces system cost and power consumption, and can be achieved under the conditions of the shock of non-destructive
Measurement is repeated several times.As shown in Figure 1, Figure 3, the system includes：Fluorescence optical fiber perceives unit 1, photoelectric processing unit 2, damages and determine
Bit processing unit 3.
By after external impact or shock, fluorescence optical fiber perceives caused by the sensitivity of unit 1 to impact or shock measured target
Pressure, the fluorescence optical fiber 101 coated with piezallochromy gathering induced luminescence material produce piezoluminescence, and fluorescence optical fiber perceives unit
Piezoluminescence signal caused by 1 is transmitted to photoelectric processing unit 2；Photoelectric processing unit 2 receives optical signal, carries out photoelectricity and turns
Change, amplify, the processing such as analog/digital conversion, the dsp chip in photoelectric processing unit 2 carries out Fourier to the data signal after processing
Conversion, obtains the fluorescence decay time of piezoluminescence signal, and photoelectric processing unit 2 exports fluorescence decay time to damage reason location
Processing unit 3；Damage reason location processing unit 3 receives fluorescence decay time, and causes the same coding of optical signal arrival glimmering by pressing
Forward and reverse time difference of light optical fiber both ends photoelectric processing unit 2, (pressure caused optical signal to reach same coding fluorescence optical fiber both ends photoelectricity
Forward and reverse time difference of processing unit 2 was obtained according to fluorescence decay time, was specially：Reach same root fluorescence optical fiber 101
The fluorescence decay time difference of the other end and reference edge), and the unique characteristic acquisition damage position of orthogonal fluorescence optical fiber intersection point
Coordinate.Fluorescence optical fiber perceives unit 1, measured target and fixation is arranged in, by horizontal k roots fluorescence optical fiber 101 and longitudinal m roots fluorescence
The orthogonal composition, including k × m optical fiber intersection point 4 in length and breadth of optical fiber 101, is laid out, each vertical or horizontal fluorescence optical fiber in grid-shaped
It is composed of fixed coding, determining for impact damage is realized by the intersection location of external force pressure according to vertical and horizontal fluorescence optical fiber
Position.Fluorescence optical fiber 101 is coated with piezallochromy gathering induced luminescence material, and the crystalline texture of the material occurs under external force
Change, cause its molecular entergy level is horizontal to be changed with luminescent spectrum, fluorescence optical fiber 101 produces piezoluminescence phenomenon.Fluorescence light
Fibre perceives unit 1, receives the external world and hits, and carries out sensitive, the generation piezoluminescence of fluorescence optical fiber 101 to hitting external force, and light is believed
Number transmit to photoelectric processing unit 2.Wherein, k is positive integer, and m is positive integer.
Photoelectric processing unit 2 is made up of the individual photoelectric processing devices 201 of 2 (k+m), and the every both ends of fluorescence optical fiber 101 connect respectively
Photoelectric processing device 201 all the way；As shown in Fig. 2 include per photoelectric processing device 201 all the way：Based on PIN diode or the pole of snowslide two
Photoelectric conversion module, amplifier, modulus (A/D) modular converter, the dsp chip of pipe；Photoelectric conversion module, which receives to hit, presses cause glimmering
Optical signal, and electric signal is converted thereof into, export to amplifier；Amplifier receives the electric signal after opto-electronic conversion, is amplified,
And transmit to modulus (A/D) modular converter；Modulus (A/D) modular converter receives the electric signal after amplification, and is converted into number
Word signal, it is transferred to dsp chip and is calculated；Dsp chip receives the data signal after conversion, and it is carried out in quick Fu first
Leaf transformation (FFT), selection draw the spectral term of frequency spectrum, the argument of spectral term or the tangent value of argument are calculated, further according to spectral term
The tangent value of argument or argument calculates the attenuation curve and corresponds to fluorescence decay time, whether judges the road fluorescence optical fiber 101 with this
Stress or Damage and Fracture, and fluorescence decay time is transmitted to damage reason location processing unit 3.
Either end in the both ends of fluorescence optical fiber 101 of longitudinal direction is set, as the reference edge of fluorescence optical fiber 101 of longitudinal direction, to set laterally
The both ends of fluorescence optical fiber 101 in either end be the horizontal reference edge of fluorescence optical fiber 101：Damage reason location processing unit 3, receive light
The fluorescence decay time that electric treatment unit 2 exports, reached according to piezoluminescence signal and be located at 101 liang of same root longitudinal direction fluorescence optical fiber
The time difference at end, obtain the length of fluorescence optical fiber 101 reference edge of the forced position of corresponding longitudinal fluorescence optical fiber 101 to longitudinal direction
l1, and the time difference positioned at the horizontal both ends of fluorescence optical fiber 101 of same root is reached according to piezoluminescence signal, obtain and correspond to laterally
Fluorescence optical fiber 101 forced position to transverse direction the reference edge of fluorescence optical fiber 101 length l2, unit is perceived according to fluorescence optical fiber
Each intersection point of 1 optical fiber lattice and the one-to-one relationship of measured target surface location, determine measured target damage position.
Length l of the forced position of the fluorescence optical fiber 101 of longitudinal direction to the reference edge of fluorescence optical fiber 101 of longitudinal direction1Calculating it is public
Formula is as follows：
Wherein, L1To be arranged in the length of longitudinal fluorescence optical fiber 101 of measured target, Δ t1Arrived for piezoluminescence signal
The time difference of fluorescence optical fiber 101 reference edge longitudinal up to the other end of fluorescence optical fiber 101 of longitudinal direction and arrival, c are light in vacuum
In spread speed, n be sensor fibre fibre core refractive index.
Length l of the forced position of horizontal fluorescence optical fiber 101 to the reference edge of fluorescence optical fiber 101 of transverse direction2Calculating it is public
Formula is as follows：
Wherein, L2To be arranged in the length of the horizontal fluorescence optical fiber 101 of measured target, Δ t2Arrived for piezoluminescence signal
The time difference of fluorescence optical fiber 101 reference edge horizontal up to the other end of fluorescence optical fiber 101 of transverse direction and arrival.
Described above, only the preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto is any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (6)
- A kind of 1. damage reason location system of the forward and reverse detection of fluorescence optical fiber, it is characterised in that including：Fluorescence optical fiber perceives unit (1), photoelectric processing unit (2), damage reason location processing unit (3)；Fluorescence optical fiber perceives unit (1) and is arranged in measured target surface And it is fixed；Fluorescence optical fiber perceives the sensitive outside power applied to suffered by measured target of unit (1), produces pressure and causes light letter Number, and pressure is caused into optical signal transmission to photoelectric processing unit (2)；Photoelectric processing unit (2) causes optical signal to handle pressure, obtains Fluorescence decay time is obtained, and is exported to damage reason location processing unit (3)；Damage reason location processing unit (3) causes optical signal according to pressure The time difference for reaching same coding fluorescence optical fiber (101) both ends photoelectric processing unit (2) obtains the coordinate of damage position.
- 2. the damage reason location system of the forward and reverse detection of a kind of fluorescence optical fiber according to claim 1, it is characterised in that described Fluorescence optical fiber, which perceives unit (1), includes horizontal k roots fluorescence optical fiber (101), longitudinal m roots fluorescence optical fiber (101), fluorescence optical fiber (101) orthogonal formation optical fiber lattice in length and breadth, each vertical or horizontal fluorescence optical fiber are composed of fixed coding, fluorescence optical fiber (101) piezallochromy gathering induced luminescence material is coated with, wherein, k is positive integer, and m is positive integer.
- A kind of 3. damage reason location system of the forward and reverse detection of fluorescence optical fiber according to claim 1 or 2, it is characterised in that The photoelectric processing unit (2) includes photoelectric processing device (201), and every fluorescence optical fiber (101) both ends connect a photoelectricity respectively Processor (201)；Photoelectric processing device (201) includes：Photoelectric conversion module, amplifier, A/D modular converters, dsp chip；Photoelectricity The pressure received cause fluorescence signal is converted into electric signal by modular converter, is sent to amplifier；Amplifier is to the telecommunications that receives Number it is amplified, and transmits to A/D modular converters；After A/D modular converters convert electrical signals to data signal, DSP is transferred to Chip；Dsp chip carries out Fast Fourier Transform (FFT) to data signal first, and selection draws the spectral term of frequency spectrum, and obtains corresponding frequency The argument of spectral term or the tangent value of argument are composed, the tangent value of argument or argument further according to spectral term calculates the decay that pressure causes optical signal Fluorescence decay time corresponding to curve, according to fluorescence decay time judge the road fluorescence optical fiber (101) whether stress or damage it is disconnected Split.
- 4. the damage reason location system of the forward and reverse detection of a kind of fluorescence optical fiber according to claim 1, it is characterised in that described Damage reason location processing unit (3) reaches the time positioned at same root longitudinal direction fluorescence optical fiber (101) both ends according to piezoluminescence signal Difference, obtain the length l of fluorescence optical fiber (101) reference edge of the forced position of corresponding longitudinal fluorescence optical fiber (101) to longitudinal direction1, And the time difference positioned at horizontal fluorescence optical fiber (101) both ends of same root is reached according to piezoluminescence signal, obtain and correspond to laterally Fluorescence optical fiber (101) forced position to transverse direction fluorescence optical fiber (101) reference edge length l2, wherein, set longitudinal Either end is fluorescence optical fiber (101) reference edge of longitudinal direction in fluorescence optical fiber (101) both ends, sets horizontal fluorescence optical fiber (101) either end is horizontal fluorescence optical fiber (101) reference edge in both ends；Unit (1) optical networking is perceived according to fluorescence optical fiber Each intersection point of lattice and the one-to-one relationship of measured target surface location, determine measured target damage position.
- 5. the damage reason location system of the forward and reverse detection of a kind of fluorescence optical fiber according to claim 4, it is characterised in that described Length l of the forced position of the fluorescence optical fiber (101) of longitudinal direction to fluorescence optical fiber (101) reference edge of longitudinal direction1Calculation formula such as Under：Wherein, L1To be arranged in the length of longitudinal fluorescence optical fiber (101) of measured target, Δ t1Reached for piezoluminescence signal Fluorescence optical fiber (101) other end of longitudinal direction and the time difference for reaching longitudinal fluorescence optical fiber (101) reference edge, c are light true Aerial spread speed, n are the refractive index of sensor fibre fibre core.
- 6. the damage reason location system of the forward and reverse detection of a kind of fluorescence optical fiber according to claim 5, it is characterised in that described Length l of the forced position of horizontal fluorescence optical fiber (101) to fluorescence optical fiber (101) reference edge of transverse direction2Calculation formula such as Under：Wherein, L2To be arranged in the length of the horizontal fluorescence optical fiber (101) of measured target, Δ t2Reached for piezoluminescence signal Horizontal fluorescence optical fiber (101) other end and the time difference of fluorescence optical fiber (101) reference edge for reaching transverse direction.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163987A (en) * | 2018-08-07 | 2019-01-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of the impact damage process measurement device and measurement method of airbound target |
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| CN201425525Y (en) * | 2009-06-05 | 2010-03-17 | 北京迅天宇光电科技有限公司 | Fluorescence optical fiber sensing and demodulating system |
| CN103674083A (en) * | 2013-12-13 | 2014-03-26 | 北京航天时代光电科技有限公司 | High-speed particle impact test system |
| CN106643838A (en) * | 2016-12-01 | 2017-05-10 | 北京航天控制仪器研究所 | Bumping position measuring system and method based on bidirectional detection of fiber ring |
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2017
- 2017-07-31 CN CN201710637387.5A patent/CN107576956B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201425525Y (en) * | 2009-06-05 | 2010-03-17 | 北京迅天宇光电科技有限公司 | Fluorescence optical fiber sensing and demodulating system |
| CN103674083A (en) * | 2013-12-13 | 2014-03-26 | 北京航天时代光电科技有限公司 | High-speed particle impact test system |
| CN106643838A (en) * | 2016-12-01 | 2017-05-10 | 北京航天控制仪器研究所 | Bumping position measuring system and method based on bidirectional detection of fiber ring |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163987A (en) * | 2018-08-07 | 2019-01-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of the impact damage process measurement device and measurement method of airbound target |
| CN109163987B (en) * | 2018-08-07 | 2021-04-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for measuring impact damage process of flying target |
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