CN110530565A - A kind of multi-channel Time measuring device and method based on optical fiber probe - Google Patents
A kind of multi-channel Time measuring device and method based on optical fiber probe Download PDFInfo
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- CN110530565A CN110530565A CN201910897066.8A CN201910897066A CN110530565A CN 110530565 A CN110530565 A CN 110530565A CN 201910897066 A CN201910897066 A CN 201910897066A CN 110530565 A CN110530565 A CN 110530565A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F13/00—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00
- G04F13/02—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00 using optical means
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- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The embodiment of the present application provides a kind of multi-channel Time measuring device and method based on optical fiber probe, is related to Fibre Optical Sensor fields of measurement.The device includes the road n optical fiber probe, for handling respectively the road n laser signal；When the metal film on optical fiber probe end face does not destroy, then optical fiber probe return laser light signal；Otherwise, optical fiber probe not return laser light signal；Wherein, after generating the explosion instruction Tnx moment, Tny moment shock wave destroys the metal film；Time identification device for identifying the road the n optical fiber probe return laser light signal in real time, and records and does not occur return laser light signal moment Tny, i.e., at the time of shock wave reaches the metal film and destroys the metal film, wherein n is more than or equal to 0.The device can satisfy remote measurement demand, realizes the multiple spot of shock wave while measuring, and have the characteristics that small dispersion, high reliablity, temporal resolution are high.
Description
Technical field
This application involves Fibre Optical Sensor fields of measurement, survey in particular to a kind of multi-channel Time based on optical fiber probe
Measure device and method.
Background technique
In shock wave or detonation test, in order to measure the shock wave arrival time under special environment condition, usually adopt
It is tested with optical fiber probe.Optical fiber probe is worked using the characteristic that its silica fibre shines when receiving impact, due to optical fiber
The particularity of probe face principle determines that it continuously can persistently provide the information that impact reaches in unspoiled situation,
There is important use in Shock wave physics parameter measurement.
In the prior art, optical fiber probe is usually multimode fibre transmitting signal.But multimode fibre has the following problems: right
There is the problems such as decaying is larger, and dispersion is larger in the signal caused by transmitting signal at a distance.
Summary of the invention
The embodiment of the present application provides a kind of multi-channel Time measuring device and method based on optical fiber probe, which is measuring
In the test of detonation wave, film flying and shock wave arrival time, the nanosecond even time response of subnanosecond can reach.In addition, the dress
Set and can satisfy remote measurement demand, realize the multiple spot of shock wave while measuring, have dispersion is small, high reliablity, when
Between high resolution the characteristics of.
Embodiments herein is accomplished in that
A kind of multi-channel Time measuring device based on optical fiber probe includes:
The road n optical fiber probe, for handling respectively the road n laser signal；When the metal film on optical fiber probe end face not
When destruction, then optical fiber probe return laser light signal；Otherwise, after the Tnx moment generates explosion instruction, shock wave reaches the metal
Film simultaneously destroys the metal film, the not return laser light signal of the metal film on optical fiber probe end face；
Time identification device for identifying the road the n optical fiber probe return laser light signal in real time, and can not recorded and be now returned to
Laser signal moment Tny, wherein n is more than or equal to 0.
Preferably, when n is greater than 1, optical fiber delay module is also set up between the road n optical fiber probe and time identification device,
The optical fiber delay module, for successively carrying out delay output to the road n return laser light signal.This method is tested in multi-point sampler
In, the laser signal that the road n optical fiber probe returns can be uniformly multiplexed into time identification device by adjusting optical delay circuit, tied
It can be realized the minimum of time identification device on structure, in addition this method can more be accurately performed multiple spot while test.
Preferably, the road n optical fiber probe passes through the corresponding road n optical fiber circulator reception laser signal respectively, and passes through respectively
Corresponding optical fiber circulator return laser light signal.
Preferably, time identification device includes photoelectric converter and oscillograph；Photoelectric converter is used for reception optical fiber probe
The road the n laser signal of return carries out the road n laser signal and converts to electric signal；Oscillograph, for being shown to the electric signal
Show, marks not and return laser light signal moment Tny occur.
Preferably, which further includes calculating duration of shock pulse T=Tny-Tnx.
A kind of multi-channel Time measurement method based on optical fiber probe, comprising:
S1: the road n laser signal is handled respectively by the road n optical fiber probe；Metal film on optical fiber probe end face
When not destroying, then optical fiber probe return laser light signal；Otherwise, after the Tnx moment generates explosion instruction, shock wave reaches the gold
Belong to film and simultaneously destroys the metal film, the not return laser light signal of the metal film on optical fiber probe end face；
S2: the road the n optical fiber probe return laser light signal is identified by time identification device in real time, and records and does not return
Laser signal moment Tny is returned, wherein n is more than or equal to 0.
It preferably, further include by optical fiber delay module successively to the gold between step S1 and S2 when n is greater than 1
Belong to film return laser light signal to be postponed.
Preferably, the road n optical fiber probe passes through the corresponding road n optical fiber circulator reception laser signal respectively, and passes through respectively
Corresponding optical fiber circulator return laser light signal.
Preferably, the identification road n metal film return laser light signal includes: S21 in real time: being visited by photoelectric converter reception optical fiber
The road the n laser signal that needle returns carries out the road n laser signal and converts to electric signal；S22: by oscillograph to the electric signal into
Row display, marks not and return laser light signal moment Tny occurs.
It preferably, further include calculating duration of shock pulse T=Tny-Tnx.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the time tester schematic diagram of optical fiber probe all the way；
Fig. 2 is the time tester schematic diagram of multi-channel optical fibre probe；
Icon: 1- multichannel beam splitter；2- filter；3- optical fiber circulator；4- optical fiber probe；5- optical fiber delay module；51-
Fiber coupler；52- fiber turns；6- time identification device；61- photoelectric converter；62- oscillograph；7- processor；
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
Referring to Fig.1 and 2, in embodiments of the present invention, which includes the road n optical fiber probe 2 and time identification device
6。
The road n optical fiber probe, for handling respectively the road n laser signal；When the metal film on optical fiber probe end face not
When destruction, then optical fiber probe return laser light signal；Otherwise, after the Tnx moment generates explosion instruction, shock wave reaches the metal
Film simultaneously destroys the metal film, the not return laser light signal of the metal film on optical fiber probe end face；
Time identification device for identifying the road the n optical fiber probe return laser light signal in real time, and can not recorded and be now returned to
Laser signal moment Tny, wherein n is more than or equal to 0.
Embodiment one: if when n=1, please continue to refer to Fig. 1, fiber optical circulator 3 uses three port circulators, from first end
The light of mouth input is exported by second port, and the light inputted from second port is exported by third port, first port and third port
Between high degree of isolation.The device includes that the first port of optical fiber circulator 3 is connect with laser, the second end of optical fiber circulator 3
Mouth is connect with optical fiber probe 4, and third port and time identification device 6, the processor 7 of fiber optical circulator 3 are sequentially connected.
After generating the explosion instruction Tnx moment, the laser signal of laser transmitting passes through the first port of optical fiber circulator 3
Into optical fiber circulator 3, entering optical fiber probe 4 from the second port of optical fiber circulator 3, when optical fiber probe 4 metal film not
When being destroyed, laser signal is transmitted back to optical fiber circulator 3, passes through 3 third port entry time identification device 6 of optical fiber circulator
It is identified in real time, when the metal membrane-coating of optical fiber probe 4 destroys, laser signal will not be reflected, and time identification device 6 does not have
Laser signal enters, and is Tny at the time of record at this time, that is to say, that destroy the gold of optical fiber probe 4 in Tny moment shock wave
Belong to film.According to T=T1y-T1x, duration of shock pulse T is obtained.
Similarly, if when n=2, the duration of shock pulse T=T1y-T1x of the first via；When the shock wave on the second tunnel continues
Between T=T2y-T2x；
Similarly, if when n=3, the duration of shock pulse T=T1y-T1x of the first via；When the shock wave on the second tunnel continues
Between T=T2y-T2x；The duration of shock pulse T=T3y-T3x on third road；
It should be understood that wherein n is corresponding more than or equal to 0 when needing to realize the road n laser signal while testing
The quantity of optical fiber circulator 3, optical fiber probe 4 and time identification device 6 should also be as respectively n, while respectively according to above-mentioned steps
It is tested.Wherein, the road n laser signal can be issues from n laser, is also possible to pass through multichannel point from a laser
Beam device 1 issues.
Embodiment two: on the basis of embodiment one, when n is greater than 1, between the road n optical fiber probe and time identification device
Optical fiber delay module 5 is also set up, the optical fiber delay module 5 includes n fiber turns 52 and n-1 fiber coupler 51, and n-1 is a
Fiber coupler is arranged at intervals between n fiber turns, for successively carrying out delay output to the road n return laser light signal.Continue
Referring to Fig. 2, the laser signal of laser transmitting is divided into the road n laser signal by multichannel beam splitter 1 and is delivered to n filter 2, n
Road laser signal is also possible to issue from n laser.Each road laser of 2 pairs of filter entrance is effectively filtered
Afterwards, it is separately sent to the first port of corresponding optical fiber circulator 3, and the second port through fiber optical circulator 3 is delivered to correspondence
Fibre-optical probe 4.
After generating the explosion instruction Tnx moment, the road n laser signal reaches the road n fibre-optical probe 4, when on 4 end face of optical fiber probe
Metal film when not destroying, then metal film return laser light signal, the laser signal of return enter optical fiber delay module 5.Specific mistake
Journey are as follows: the laser signal that the 1st road optical fiber probe 4 returns passes sequentially through (the 1st the 52 to the n-th road of the tunnel fiber turns optical fiber of the road n fiber turns 52
Circle exports after 52) postponing；After the laser signal that 2nd road optical fiber probe 4 returns passes through No. 1st fiber coupler 51, then successively lead to
It is exported after crossing the road n-1 fiber turns 52 (the 2nd the 52 to the n-th tunnel of tunnel fiber turns fiber turns 52) delay；What the 3rd road optical fiber probe 4 returned
After laser signal passes through No. 2nd fiber coupler 51, then pass sequentially through (the 3rd the 52 to the n-th tunnel of tunnel fiber turns of the road n-2 fiber turns 52
Fiber turns 52) delay after export；After the laser signal that 4th road optical fiber probe 4 returns passes through No. 3rd fiber coupler 51, then according to
It is secondary by the road n-3 fiber turns 52 (the 4th the 52 to the n-th tunnel of tunnel fiber turns fiber turns 52) postpone after export；Backward and so on, until
After the laser signal that n-th road optical fiber probe 4 returns passes through No. (n-1)th fiber coupler 51, then pass sequentially through 1 tunnel fiber turns 52
It is exported after (the n-th tunnel fiber turns 52) delay.It can finally be exported from optical fiber delay module 5 from the road n that the road n fibre-optical probe 4 returns
Laser signal.Wherein, the length of fiber turns 52 determines the time interval for the laser signal that two adjacent optical fiber probes 4 return, root
It can be adjusted according to different test demands.Realize that multiple signals pass through same route by multi-channel optical fibre Postponement module in this way
It receives, realizes that the miniaturization of system and device and the maximum of hardware resource utilize.Fiber turns refer to the coil that optical fiber is coiled into,
The length along paths of fiber turns determines delay time size.
In the same manner, the road n laser signal is transmitted back to optical fiber circulator 3, passes through 3 third port entry time of optical fiber circulator
Identification device 6 is identified in real time；When the metal membrane-coating on 4 end face of the n-th road optical fiber probe destroys, laser signal will not be anti-
It penetrates, time identification device 6 enters without laser signal, is Tny at the time of record at this time, that is to say, that on the n-th tunnel of Tny moment
Shock wave destroys the metal film of optical fiber probe 4.Similarly, according to T=Tny-Tnx, the road the n duration of shock pulse is respectively obtained
T。
Embodiment three: on the basis of embodiment one and two, the road n optical fiber probe 4 passes through the corresponding road n optical fiber circulator respectively
3 receive laser signal, and pass through corresponding 3 return laser light signal of optical fiber circulator respectively.Wherein n is more than or equal to 0.
Example IV: on the basis of embodiment one to three, optical fiber circulator 3 can also use four fiber port couplers,
Its first port is direct-connected with second port, couples with third port, and the 4th port and third port are direct-connected, with second port coupling
It closes.The combination that can be formed has: (1) being exported from the light that first port inputs by second port, inputted from second port
Light exported by the 4th port；(2) it is exported from the light that second port inputs by first port, the light inputted from first port is by the
The output of three ports；(3) it is exported from the light that third port inputs by the 4th port, the light inputted from the 4th port is defeated by second port
Out；(4) it is exported from the light that the 4th port inputs by third port, the light inputted from third port is exported by first port；Negative side
To being high degree of isolation.It should be understood that the selection of its connection type can be according to the connection type class of three port circulators
It pushes away, implementation has 1), 2), 3) He 4) four kinds:
1) first port of optical fiber circulator 3 is connect with laser, and the second port and optical fiber probe of optical fiber circulator 3 connect
It connects, the 4th port of fiber optical circulator 3 is connect with the entry port of photoelectric converter 61.The laser signal of laser transmitting passes through
The first port of optical fiber circulator 3 enters optical fiber circulator, is entering optical fiber probe 4 from the second port of optical fiber circulator 3, when
When the metal film of optical fiber probe 4 is not destroyed, laser signal is transmitted back to optical fiber circulator 3, passes through the 4th end of optical fiber circulator 3
Mouth enters photoelectric converter 61.
2) second port of optical fiber circulator 3 is connect with laser, and the first port and optical fiber probe of optical fiber circulator 3 connect
It connects, the third port of fiber optical circulator 3 is connect with the entry port of photoelectric converter 61.The laser signal of laser transmitting passes through
The second port of optical fiber circulator 3 enters optical fiber circulator, is entering optical fiber probe 4 from the first port of optical fiber circulator 3, when
When the metal film of optical fiber probe 4 is not destroyed, laser signal is transmitted back to optical fiber circulator 3, passes through 3 third end of optical fiber circulator
Mouth enters photoelectric converter 61.
3) third port of optical fiber circulator 3 is connect with laser, and the 4th port of optical fiber circulator 3 and optical fiber probe connect
It connects, the second port of fiber optical circulator 3 is connect with the entry port of photoelectric converter 61.The laser signal of laser transmitting passes through
The third port of optical fiber circulator 3 enters optical fiber circulator, is entering optical fiber probe 4 from the 4th port of optical fiber circulator 3, when
When the metal film of optical fiber probe 4 is not destroyed, laser signal is transmitted back to optical fiber circulator 3, passes through 3 second end of optical fiber circulator
Mouth enters photoelectric converter 61.
4) the 4th port of optical fiber circulator 3 is connect with laser, and the third port and optical fiber probe of optical fiber circulator 3 connect
It connects, the first port of fiber optical circulator 3 is connect with the entry port of photoelectric converter 61.The laser signal of laser transmitting passes through
4th port of optical fiber circulator 3 enters optical fiber circulator, is entering optical fiber probe 4 from the third port of optical fiber circulator 3, when
When the metal film of optical fiber probe 4 is not destroyed, laser signal is transmitted back to optical fiber circulator 3, passes through 3 first end of optical fiber circulator
Mouth enters photoelectric converter 61.
Embodiment five: on the basis of embodiment one to four, time identification device 6 includes photoelectric converter 61 and oscillograph
62；When the metal film of optical fiber probe 4 is not destroyed, the road the n laser signal that 61 reception optical fiber probe 4 of photoelectric converter returns,
It is changed into be input to oscillograph 62 after electric signal and being shown.When the metal membrane-coating of optical fiber probe 4 destroys, laser signal
It will not be reflected, failing edge can directly occur in oscillograph 62 at this time, and recording this moment is Tny.According to T=Tny-Tnx, rushed
Hit wave duration T.
Embodiment six: on the basis of embodiment one to five, the calculating of the road n duration of shock pulse T=Tny-Tnx be can be
The operation artificially carried out can also be handled on processor 7.
Embodiment seven: on the basis of embodiment one to six, the main composition of optical fiber probe 4: fiber end face is ground by polishing
Mill is at plating metal on surface reflectance coating (optical fiber probe least significant end plated film).Casing in optical fiber probe 4 uses metal material, mainly
To guarantee probe installation accuracy.
Embodiment eight: when the metal film on 4 end face of optical fiber probe does not destroy, then golden on the basis of embodiment one to seven
Belong to film return laser light signal, the laser signal of reflection, which is converted to by photoelectric converter 61, to be shown in oscillograph 62 after electric signal
Level is normal high state.When the metal film on 4 end face of optical fiber probe destroys, no laser signal backs into oscillograph 62,
At this point, oscillograph 62 will appear failing edge, the time is Tny this moment.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.It should also be noted that similar label and
Letter indicates similar terms in following attached drawing, therefore, once it is defined in a certain Xiang Yi attached drawing, then in subsequent attached drawing
In do not need that it is further defined and explained.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Claims (10)
1. a kind of multi-channel Time measuring device based on optical fiber probe, it is characterised in that including；
The road n optical fiber probe, for handling respectively the road n laser signal；When the metal film on optical fiber probe end face does not destroy
When, then optical fiber probe return laser light signal；Otherwise, after the Tnx moment generates explosion instruction, shock wave reaches the metal film simultaneously
The metal film is destroyed, the not return laser light signal of the metal film on optical fiber probe end face；
Time identification device for identifying the road the n optical fiber probe return laser light signal in real time, and records and return laser light does not occur
Signal moment Tny, wherein n is more than or equal to 0.
2. the device as described in power 1, it is characterised in that when n is greater than 1, between the road n optical fiber probe and time identification device also
Optical fiber delay module, the optical fiber delay module, for successively carrying out delay output to the road n return laser light signal are set.
3. the device as described in power 1, it is characterised in that the road n optical fiber probe passes through the reception of the corresponding road n optical fiber circulator respectively and swashs
Optical signal, and pass through corresponding optical fiber circulator return laser light signal respectively.
4. the device as described in power 2, it is characterised in that time identification device includes photoelectric converter and oscillograph；
Photoelectric converter carries out the road n laser signal and converts to electric signal for the road the n laser signal that reception optical fiber probe returns；
Oscillograph marks not for showing to the electric signal and return laser light signal moment Tny occurs.
5. the device as described in power 2, it is characterised in that further include calculating duration of shock pulse T=Tny-Tnx.
6. a kind of multi-channel Time measurement method based on optical fiber probe, it is characterised in that including；
S1: the road n laser signal is handled respectively by the road n optical fiber probe；When the metal film on optical fiber probe end face is not broken
Bad when, then optical fiber probe return laser light signal；Otherwise, after the Tnx moment generates explosion instruction, shock wave reaches the metal film
And the metal film is destroyed, the not return laser light signal of the metal film on optical fiber probe end face；
S2: identifying the road the n optical fiber probe return laser light signal by time identification device in real time, and can not record now return to it is sharp
Optical signal moment Tny, wherein n is more than or equal to 0.
7. the method as described in power 6, it is characterised in that further include passing through optical fiber delay between step S1 and S2 when n is greater than 1
Module successively postpones the metal film return laser light signal.
8. the method as described in power 6, it is characterised in that the road n optical fiber probe passes through the reception of the corresponding road n optical fiber circulator respectively and swashs
Optical signal, and pass through corresponding optical fiber circulator return laser light signal respectively.
9. the method as described in power 7, it is characterised in that the identification road n metal film return laser light signal includes: in real time
S21: the road the n laser signal returned by photoelectric converter reception optical fiber probe carries out the road n laser signal and turns to electric signal
It changes；
S22: the electric signal is shown by oscillograph, marks not and return laser light signal moment Tny occurs.
10. the method as described in power 7, it is characterised in that further include calculating duration of shock pulse T=Tny-Tnx.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113587756A (en) * | 2021-08-30 | 2021-11-02 | 中国人民解放军陆军工程大学 | Multi-point detonation source differential delay detonation simulation device |
| CN114323392A (en) * | 2022-03-11 | 2022-04-12 | 中国工程物理研究院流体物理研究所 | Probe, probe assembly, measuring device and measuring method for detonation test |
| CN118131589A (en) * | 2024-05-08 | 2024-06-04 | 中国人民解放军国防科技大学 | Distributed multi-channel optical fiber time interval measuring device, method, equipment and medium |
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