CN207832116U - A kind of fiber cable cross connection box collapse state detection sensor - Google Patents
A kind of fiber cable cross connection box collapse state detection sensor Download PDFInfo
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- CN207832116U CN207832116U CN201721866418.6U CN201721866418U CN207832116U CN 207832116 U CN207832116 U CN 207832116U CN 201721866418 U CN201721866418 U CN 201721866418U CN 207832116 U CN207832116 U CN 207832116U
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Abstract
The utility model embodiment provides a kind of fiber cable cross connection box collapse state detection sensor, and the sensor includes：Shell, elastomer, weight and the first optical fiber；Shell is the semicircle shell of sealing, and the first end of elastomer is fixed on the upper surface of shell, and the second end of elastomer fixes weight；The first fiber grating is distributed on the fibre core of the first end of first optical fiber；The first end of first optical fiber is pasted onto in the first side of elastomer；The second end of first optical fiber is pierced by from the through-hole on the upper surface of shell；First fiber grating is used for the optical signal of reverberated far end wideband light source transmitting, and the first optical fiber is output to server for inputting broadband optical signal, and by the optical signal that the first fiber grating reflects.The sensor can detect whether fiber cable cross connection box is destroyed, and the sensor is passive device, independent of power supply, can be adapted for remote and unpowered power supply fiber cable cross connection box, have wider array of application range.
Description
Technical field
The utility model embodiment is related to technical field of photo communication more particularly to a kind of detection of fiber cable cross connection box collapse state
Sensor.
Background technology
Fiber cable cross connection box is a kind of convergent point of important fiber resource in optical fiber transmission network, and realizes fiber resource
The important node integrated and managed.
In practical applications, fiber cable cross connection box and optical fiber transmission network are all passive, a large amount of optical cable in transmission process
Fiber cable cross connection box in cross-connecting box, especially remote light transmission is located at wilderness field, and in these cases, fiber cable cross connection box pole holds
It is vulnerable to criminal deliberately to destroy, or is attacked and be damaged by wild animal.It, can be right after fiber cable cross connection box is destroyed
Whether the normal operation of entire optical fiber transmission network brings very detrimental effect, therefore, to fiber cable cross connection box by destruction progress
Detection in real time, after detecting that fiber cable cross connection box is damaged, to take corresponding remedial measure, it appears particularly important.
In the prior art, electronic sensor may be used to detect whether fiber cable cross connection box is destroyed, it is still, existing
Electronic sensor carries out taking electricity at work, and in some remote districts, electronic sensor can not carry out on-site power acquisition,
Therefore, the scope of application of this kind of electronic sensor is restricted.
Utility model content
For problems of the prior art, the utility model embodiment provides a kind of fiber cable cross connection box collapse state inspection
Sensor is surveyed, the sensor includes：
Shell, elastomer, weight and the first optical fiber；The shell is the semicircle shell of sealing, the of the elastomer
One end is fixed on the upper surface of the shell, and the second end of the elastomer fixes the weight；The of first optical fiber
The first fiber grating is distributed on the fibre core of one end；The first end of first optical fiber is pasted onto the first side of the elastomer
On；The second end of first optical fiber is pierced by from the through-hole on the upper surface of the shell；
Wherein, the upper surface of the shell refers to the table parallel to the ground and far from ground of the semicircle shell
Face；
First fiber grating is used for the optical signal of reverberated far end wideband light source transmitting, and fiber cable cross connection box is destroyed
When, the corresponding wavelength of peak power of the optical signal of the first fiber grating reflection, when being not affected by destruction with the fiber cable cross connection box,
The corresponding wavelength of peak power of the optical signal of first fiber grating reflection is different, and first optical fiber is for inputting the broadband
Optical signal, and the optical signal that first fiber grating reflects is output to server.
Such as the sensor, optionally, the sensor further includes：
Second optical fiber, fiber coupler and output optical fibre；It is distributed with second on the fibre core of the first end of second optical fiber
Fiber grating；The first end of second optical fiber is pasted onto in the second side of the elastomer；The second of first optical fiber
End is connected with the first end of the fiber coupler respectively with the second end of second optical fiber, and the second of the fiber coupler
End is connected with the first end of the output optical fibre, and the second end of the output optical fibre is worn from the through-hole on the upper surface of the shell
Go out；
Wherein, second fiber grating is used for the optical signal of reverberated far end wideband light source transmitting, the fiber cable cross connection box
When being destroyed, the second fiber grating reflection optical signal the corresponding wavelength of peak power, with the fiber cable cross connection box not by
To when destroying, the corresponding wavelength of peak power of the optical signal of the second fiber grating reflection is different；
The output optical fibre is used to input the broadband optical signal, and the optical signal that first fiber grating is reflected
It is output to server with the optical signal of second fiber grating reflection.
Such as the sensor, optionally, the elastomer is fixed on the center of the upper surface of the shell.
Such as the sensor, optionally, the elastomer is sheet metal.
Such as the sensor, optionally, the sheet metal is iron plate or aluminium flake.
The fiber cable cross connection box collapse state detection sensor that the utility model embodiment provides, including：Shell, elastomer,
The first fiber grating is distributed on the fibre core of the first optical fiber in weight and the first optical fiber, and the first fiber grating can be with reverberated far end light
The optical signal of source transmitting, when fiber cable cross connection box is destroyed, the peak power of the optical signal of the first fiber grating reflection corresponds to
Wavelength, when being not affected by destruction with fiber cable cross connection box, the first fiber grating reflection optical signal the corresponding wavelength of peak power
The optical signal that first fiber grating reflects can be sent to server by difference, the first optical fiber, which may be implemented to light
Whether cable distributing box is detected by destruction, and the sensor does not depend on power supply, belongs to passive device, can be adapted for remote
And therefore the fiber cable cross connection box of unpowered power supply has wider array of application range.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram for the fiber cable cross connection box collapse state detection sensor that the utility model embodiment provides；
Fig. 2 is the structural representation for the fiber cable cross connection box collapse state detection sensor that another embodiment of the utility model provides
Figure；
Fig. 3 is the schematic diagram of signal transmission in fiber grating in the prior art.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, is explicitly described the technical scheme in the embodiment of the utility model, it is clear that described reality
It is the utility model a part of the embodiment to apply example, instead of all the embodiments.Based on the embodiments of the present invention, ability
It is new to belong to this practicality for the every other embodiment that domain those of ordinary skill is obtained without making creative work
The range of type protection.
Fig. 1 is the structural schematic diagram for the fiber cable cross connection box collapse state detection sensor that the utility model embodiment provides,
As shown in Figure 1, the sensor includes：
Shell 1, elastomer 2, weight 3 and the first optical fiber 8；The shell 1 is the semicircle shell of sealing, the elastomer
2 first end is fixed on the upper surface 101 of the shell 1, and the second end of the elastomer 2 fixes the weight 3；Described
The first fiber grating 4 is distributed on the fibre core of the first end of one optical fiber 8；The first end of first optical fiber 8 is pasted onto the bullet
In the first side 201 of property body 2；The second end of first optical fiber 8 is pierced by from the through-hole 10 on the upper surface of the shell 1；
Wherein, the upper surface 101 of the shell 1 refers to the ground parallel to the ground and separate of the semicircle shell
Surface；
First fiber grating 4 is used for the optical signal of reverberated far end wideband light source transmitting, and fiber cable cross connection box is destroyed
When, the corresponding wavelength of peak power of the optical signal of the first fiber grating 4 reflection is not affected by destruction with the fiber cable cross connection box
When, the corresponding wavelength of peak power of the optical signal of the first fiber grating 4 reflection is different, and first optical fiber 8 is for inputting institute
Broadband optical signal is stated, and the optical signal that first fiber grating 4 reflects is output to server.
Specifically, the utility model embodiment provides a kind of fiber cable cross connection box collapse state detection sensor, the sensor
May include：Shell 1, elastomer 2, weight 3 and the first optical fiber 8.Wherein, shell 1 plays a part of to fix and support, and shell 1 can
Think a shell seal, global shape semicircular in shape.The shape of elastomer 2 can be strip, one end of elastomer 2
It can be denoted as the first end of elastomer 2, the other end of elastomer 2 can be denoted as the first end of elastomer 2.Wherein, elastomer 2
First end can be fixed on the upper surface 101 of shell 1.The upper surface 101 of shell 1 refer to the parallel to the ground of shell 1 and
Surface far from ground.The second end of elastomer 2 can be fixed there are one weight 3.
Wherein one end of first optical fiber 8, can be denoted as the first end of the first optical fiber 8, the other end of the first optical fiber 8, can be with
It is denoted as the second end of the first optical fiber 8.Wherein, the first fiber grating 4 can be distributed on the fibre core of the first end of the first optical fiber 8.
One side of elastomer 2 can be denoted as first side 201, and the first end of the first optical fiber 8 can be pasted onto elasticity
In the first side 201 of body 2, the second end of the first optical fiber 8 can be pierced by from the through-hole 10 on the upper surface of shell 1.
First optical fiber 8, can be with the optical cable welding in fiber cable cross connection box after through-hole 10 is pierced by.Distal end wideband light source can
To emit optical signal to the first optical fiber 8 by optical cable, the optical signal of distal end wideband light source transmitting can pass in the first optical fiber 8
Defeated, when encountering the first fiber grating 4, a part of optical signal is reflected.
Fig. 3 is the schematic diagram of signal transmission in fiber grating in the prior art.According to signal in existing fiber grating
It is found that fiber grating is the grating of the period profiles such as in the core region of optical fiber, fiber grating can pass through for the principle of transmission
Prepared by mask method so that the index distribution in fiber core changes.When the incident light with certain spectral region
Into after fiber grating, a part of spectral component is reflected, and the spectral component of transmission changes.
As shown in figure 3, power distribution of the incident light within the scope of all wavelengths is uniform, after fiber grating,
A part of light is reflected by fiber grating, and a part of light continues to propagate through fiber grating.Wherein, the power distribution of reflected light
There is a power peak, which corresponds to a wavelength；Correspondingly, there is a work(in the power distribution for the light being transmitted
Rate minimum value, the power minimum also correspond to a wavelength.
After the optical signal of distal end wideband light source transmitting is reflected by the first fiber grating 4, reflected optical signal will appear one
The wavelength of a peak power, the peak power can be denoted as：λB1。
Fig. 2 is the structural representation for the fiber cable cross connection box collapse state detection sensor that another embodiment of the utility model provides
Figure.In practical applications, the shell 1 of fiber cable cross connection box collapse state detection sensor can be fixed in fiber cable cross connection box, bullet
Property body 2 under the gravity of weight 3, be in vertical state.When fiber cable cross connection box is shaken due to artificial, animal damage
When, which also can correspondingly shake, when the left and right directions shown in the arrow during sensor is along Fig. 2 shakes,
The weight 3 of 2 lower end of elastomer has the trend for keeping original vertical state due to inertia so that and elastomer 2 bends, into
And make the first fiber grating 4 that tensile deformation or compressive deformation occur.After the first fiber grating 4 deforms upon, the first optical fiber
The corresponding wavelength of peak power for the optical signal that grating 4 reflects can change.
The optical signal of first fiber grating 4 reflection, can be exported by the first optical fiber 8, the light of distal end is output to by optical cable
Signal receiver.Server can obtain the optical signal that optical signal receiver receives, the peak power of the optical signal got
Corresponding wavelength can be denoted as：λB2。
If server is known by analysis, λB2With λB1It compares, does not change, then illustrate that fiber cable cross connection box does not have
It is destroyed；If λB2With λB1It compares, changes, then illustrate that fiber cable cross connection box is destroyed.If server is by sentencing
Disconnected to know, fiber cable cross connection box is destroyed, then can trigger corresponding remedial measure.
The fiber cable cross connection box collapse state detection sensor that the utility model embodiment provides, including：Shell, elastomer,
The first fiber grating is distributed on the fibre core of the first optical fiber in weight and the first optical fiber, and the first fiber grating can be with reverberated far end light
The optical signal of source transmitting, when fiber cable cross connection box is destroyed, the peak power of the optical signal of the first fiber grating reflection corresponds to
Wavelength, when being not affected by destruction with fiber cable cross connection box, the first fiber grating reflection optical signal the corresponding wavelength of peak power
The optical signal that first fiber grating reflects can be sent to server by difference, the first optical fiber, which may be implemented to light
Whether cable distributing box is detected by destruction, and the sensor does not depend on power supply, belongs to passive device, can be adapted for remote
And therefore the fiber cable cross connection box of unpowered power supply has wider array of application range.
As shown in Figure 1, optionally, on the basis of the above embodiments, the sensor includes：Shell 1, elastomer 2, again
Object 3, the first optical fiber 8, the second optical fiber 9, fiber coupler 6 and output optical fibre 7, wherein：
The second fiber grating 5 is distributed on the fibre core of the first end of second optical fiber 9；The first of second optical fiber 9
End is pasted onto in the second side of the elastomer 2；The second end of the second end of first optical fiber 8 and second optical fiber 9
It is connected respectively with the first end of the fiber coupler 6, the of the second end of the fiber coupler 6 and the output optical fibre 7
One end is connected, and the second end of the output optical fibre 7 is pierced by from the through-hole 10 on the upper surface of the shell 1；
Wherein, second fiber grating 5 is used for the optical signal of reverberated far end wideband light source transmitting, the fiber cable cross connection box
When being destroyed, the second fiber grating 5 reflection optical signal the corresponding wavelength of peak power, with the fiber cable cross connection box not by
To when destroying, the corresponding wavelength of peak power of the optical signal of the second fiber grating 5 reflection is different；
The output optical fibre 7 is used to input the broadband optical signal, and the light that first fiber grating 4 is reflected is believed
Number and second fiber grating 5 reflection optical signal be output to server.
Specifically, the utility model embodiment provides a kind of fiber cable cross connection box collapse state detection sensor, the sensor
May include：Shell 1, elastomer 2, weight 3, the first optical fiber 8, the second optical fiber 9, fiber coupler 6 and output optical fibre 7.Wherein,
The shell 1, the elastomer 2, the weight 3 and first optical fiber 8, are described in detail, herein in the above-described embodiments
It repeats no more.
Wherein one end of second optical fiber 9, can be denoted as the first end of the second optical fiber 9, the other end of the second optical fiber 9, can be with
It is denoted as the second end of the second optical fiber 9.Wherein, the second fiber grating 5 can be distributed on the fibre core of the first end of the second optical fiber 9.
Another side of elastomer 2 can be denoted as second side 202, and the first end of the second optical fiber 9 can be pasted onto the of elastomer 2
On two side faces 202.
Wherein one end of fiber coupler 6, can be denoted as the first end of fiber coupler 6, fiber coupler 6 it is another
End, can be denoted as the second end of fiber coupler 6.Wherein one end of output optical fibre 7, can be denoted as the first end of output optical fibre 7,
The other end of output optical fibre 7 can be denoted as the second end of output optical fibre 7.
The second end of the second end of first optical fiber 8 and the second optical fiber 9 can respectively with the first end phase of fiber coupler 6
Even.The second end of fiber coupler 6 can be connected with the first end of output optical fibre 7, and the second end of output optical fibre 7 can be from shell
Through-hole 10 on 1 upper surface is pierced by.
Output optical fibre 7, can be with the optical cable welding in fiber cable cross connection box after through-hole 10 is pierced by.Distal end wideband light source can
To emit optical signal to output optical fibre 7 by optical cable, the optical signal of distal end wideband light source transmitting can pass in output optical fibre 7
It is defeated, after fiber coupler 6, respectively enter the first optical fiber 8 and the second optical fiber 9 relaying resume it is defeated.When distal end wideband light source is sent out
When the optical signal penetrated encounters the first fiber grating 4 in the first optical fiber 8, a part of optical signal is reflected；Similar, when distal end is wide
When optical signal with light source transmitting encounters the second fiber grating 5 in the second optical fiber 9, a part of optical signal is reflected.
The corresponding wavelength of peak power of the optical signal of first fiber grating 4 reflection can be denoted as：λB3, the second fiber grating
The corresponding wavelength of peak power of the optical signal of 5 reflections can be denoted as：λB4.The optical signal and second of first fiber grating 4 reflection
After the optical signal that fiber grating 5 reflects transmits in the first optical fiber 8 and the second optical fiber 9 respectively, into fiber coupler 6, warp
It crosses after the coupling of fiber coupler 6, into being transmitted in output optical fibre 7, output optical fibre 7 can be by 6 coupling of fiber coupler
Optical signal afterwards passes through optical cable transmission to the optical signal receiver of distal end, and server can obtain optical fiber from optical signal receiver
Optical signal after the coupling of coupler 6.Server can analyze the first fiber grating 4 and from the optical signal got
The corresponding wavelength of peak power of the optical signal of two fiber gratings 5 reflection, i.e. λB3And λB4。
Server can obtain λ from databaseB0, λB0Refer to when fiber cable cross connection box is not destroyed, and temperature is 0
Degree Celsius when, distal end wideband light source to output optical fibre emit optical signal after, by the first fiber grating 4 and the second fiber grating 5
The corresponding wavelength of peak power of reflected optical signal.The peak power of the optical signal of first fiber grating 4 reflection corresponds to
The variable quantity of wavelength can be denoted as A1, A1=λB3-λB0；The peak power of the optical signal of second fiber grating 5 reflection is corresponding
The variable quantity of wavelength can be denoted as A2, A2=λB3-λB0.Wherein, A1 both included due to wavelength variable quantity caused by outer force effect,
Also include due to wavelength variable quantity caused by temperature change.Correspondingly, A2 had both included due to wavelength change caused by outer force effect
Amount, also includes due to wavelength variable quantity caused by temperature change.
Due to when the temperature varies, the peak work of the optical signal of the first fiber grating 4 and the reflection of the second fiber grating 5
The corresponding wavelength of rate can also change, the light letter of the first fiber grating 4 caused by temperature change and the reflection of the second fiber grating 5
Number the corresponding wavelength of peak power variable quantity, be identical.But due to the first fiber grating 4 and the second fiber grating 5
It is located at the first side 201 and second side 202 of elastomer 2, direction shown in arrow shakes in elastomer 2 is according to Fig. 2
When dynamic, the first fiber grating 4 with the deformation that the second fiber grating 5 occurs be it is opposite, i.e.,：When the first fiber grating 4 is drawn
When stretching deformation, compressive deformation occurs for the second fiber grating 5；When compressive deformation occurs for the first fiber grating 4, the second fiber grating
5 occur tensile deformation.Therefore, the peak power pair of the first fiber grating 4 caused by the first fiber grating 4 caused by outer force effect
The variable quantity of the variable quantity for the wavelength answered wavelength corresponding with the peak power of optical signal that the second fiber grating 5 reflects, each other
Opposite number.
Therefore, server is it can be calculated that due to the first fiber grating 4 caused by outer force effect or the second fiber grating 5
The variable quantity of the corresponding wavelength of peak power of the optical signal of reflection is：(A1-A2)/2, due to the first light caused by temperature change
The variable quantity of the corresponding wavelength of peak power of fine grating 4 or the optical signal of the second fiber grating 5 reflection is：(A1+A2)/2.
Server can judge whether fiber cable cross connection box is destroyed by external force according to the positive and negative and size of (A1-A2)/2,
And the degree destroyed by external force.If the positive and negative of (A1-A2)/2 changes back and forth, illustrate that fiber cable cross connection box is being hit
And vibrations are generated, (A1-A2)/2 is bigger, illustrates that the vibrations of fiber cable cross connection box are more violent, and the external force extent of the destruction being subject to is bigger.This
Outside, server can also judge whether fiber cable cross connection box temperature anomaly occurs, prevent optical cable from handing over according to the size of (A1+A2)/2
It connects case and is burnt destruction.
The fiber cable cross connection box collapse state detection sensor that the utility model embodiment provides, by the way that the first optical fiber light is arranged
The wavelength of grid and the second fiber grating, the peak power of the optical signal reflected using the first fiber grating and the second fiber grating is become
Change amount carries out temperature-compensating, eliminates the peak power due to the optical signal that the first fiber grating caused by temperature change reflects
Wavelength change, the accuracy in detection of the sensor is improved, it is also possible to realize different to the temperature in fiber cable cross connection box
Reason condition is detected, and prevents fiber cable cross connection box from being burnt bad.
Optionally, on the basis of the above embodiments, the elastomer is fixed on the centre bit of the upper surface of the shell
It sets.
Specifically, the elastomer described in above-described embodiment can be fixed on the centre bit of the upper surface of semicircle shell
It sets, the sensor can be made more to stablize in this way so that the sensor more science.
Optionally, on the basis of the above embodiments, the elastomer is sheet metal.
Optionally, on the basis of the above embodiments, the sheet metal is iron plate or aluminium flake.
Specifically, the elastomer in above-described embodiment can be sheet metal, when fiber cable cross connection box is by external force collision, gold
Belong to sector-meeting and stretching or compressive deformation occurs.The sheet metal can be iron plate, or aluminium flake, the utility model embodiment be not right
It is defined.The sensor more science that the utility model embodiment can be made to provide in this way.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby 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 the process, method, article or apparatus that includes the element.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the embodiments of the present invention, and
It is non-that it is limited；Although the embodiments of the present invention are described in detail with reference to foregoing embodiments, this field
Those of ordinary skill should understand that：It still can be with technical scheme described in the above embodiments is modified or right
Which part or all technical features carry out equivalent replacement；And these modifications or replacements, do not make corresponding technical solution
Essence is detached from the range of each embodiment technical solution of the embodiments of the present invention.
Claims (5)
1. a kind of fiber cable cross connection box collapse state detection sensor, which is characterized in that including：
Shell, elastomer, weight and the first optical fiber；The shell is the semicircle shell of sealing, the first end of the elastomer
It is fixed on the upper surface of the shell, the second end of the elastomer fixes the weight；The first end of first optical fiber
Fibre core on the first fiber grating is distributed with；The first end of first optical fiber is pasted onto in the first side of the elastomer；
The second end of first optical fiber is pierced by from the through-hole on the upper surface of the shell；
Wherein, the upper surface of the shell refers to the surface parallel to the ground and far from ground of the semicircle shell；
First fiber grating is used for the optical signal of reverberated far end wideband light source transmitting, when fiber cable cross connection box is destroyed, the
The corresponding wavelength of peak power of the optical signal of one fiber grating reflection, when being not affected by destruction with the fiber cable cross connection box, first
The corresponding wavelength of peak power of the optical signal of fiber grating reflection is different, and first optical fiber is for inputting the broadband light letter
Number, and the optical signal that first fiber grating reflects is output to server.
2. sensor according to claim 1, which is characterized in that further include：
Second optical fiber, fiber coupler and output optical fibre；The second optical fiber is distributed on the fibre core of the first end of second optical fiber
Grating；The first end of second optical fiber is pasted onto in the second side of the elastomer；The second end of first optical fiber with
The second end of second optical fiber is connected with the first end of the fiber coupler respectively, the second end of the fiber coupler with
The first end of the output optical fibre is connected, and the second end of the output optical fibre is pierced by from the through-hole on the upper surface of the shell；
Wherein, second fiber grating be used for reverberated far end wideband light source transmitting optical signal, the fiber cable cross connection box by
When destruction, the corresponding wavelength of peak power of the optical signal of the second fiber grating reflection is not affected by brokenly with the fiber cable cross connection box
The corresponding wavelength of peak power of bad when, the optical signal of the second fiber grating reflection are different；
The output optical fibre is for inputting the broadband optical signal, and the optical signal that first fiber grating is reflected and institute
The optical signal for stating the reflection of the second fiber grating is output to server.
3. sensor according to claim 1 or 2, which is characterized in that the elastomer is fixed on the upper table of the shell
The center in face.
4. sensor according to claim 3, which is characterized in that the elastomer is sheet metal.
5. sensor according to claim 4, which is characterized in that the sheet metal is iron plate or aluminium flake.
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| CN201721866418.6U CN207832116U (en) | 2017-12-27 | 2017-12-27 | A kind of fiber cable cross connection box collapse state detection sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946801A (en) * | 2019-03-07 | 2019-06-28 | 中山水木光华电子信息科技有限公司 | Optical cable splice closure with optical identification function and system applying same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946801A (en) * | 2019-03-07 | 2019-06-28 | 中山水木光华电子信息科技有限公司 | Optical cable splice closure with optical identification function and system applying same |
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