CN207649879U - A kind of optical fiber loses detection device - Google Patents
A kind of optical fiber loses detection device Download PDFInfo
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- CN207649879U CN207649879U CN201721788761.3U CN201721788761U CN207649879U CN 207649879 U CN207649879 U CN 207649879U CN 201721788761 U CN201721788761 U CN 201721788761U CN 207649879 U CN207649879 U CN 207649879U
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Abstract
This application discloses a kind of optical fiber to lose detection device, including：Convergent lens, spectroscope, the first photosensitive sensor and controller；Convergent lens is used for incident collimated ray into line convergence, so that the light after assembling is incident to through spectroscope the incidence end of optical fiber to be detected；It is reflected into spectroscopical reflected light from the incidence end of optical fiber to be detected and enters the first photosensitive sensor, to generate first detection signal；Controller is for judging whether first detection signal is less than the first predetermined threshold value；If so, judging that optical fiber to be detected is lost.The application utilizes reversibility of optical path, by detecting the reflected optical power reflected by the incidence end of optical fiber to be detected, and is compared with the first predetermined threshold value, can effectively improve accuracy of detection, reduces testing cost, and expands detection range and improve detectability.
Description
Technical field
This application involves fiber coupling technique field, more particularly to a kind of optical fiber loses detection device.
Background technology
Fiber coupling technique can will export the different capacities size such as from milliwatt to multikilowatt after laser and fiber coupling
Laser beam, be widely used in the fields such as laser display, illumination, telecommunication network route, industrial processes.
Optical fiber belongs to quartz material, easily even fractures to be damaged.The light beam of inside of optical fibre transmission will lose place in optical fiber
Leakage, and lead to the drastically accumulation of energy, the output power of fiber-optic output is not only influenced, it is serious but will may to cause fire etc.
Accident.Therefore, optical fiber lose detection it is particularly significant.
Optical fiber loses detection technique and immature in the prior art, and only some of the staff's temperature in use sensor is by sentencing
Disconnected temperature it is whether excessively high come detection fiber whether lose.On the one hand this method is limited by the lower detection essence of temperature sensor
Degree；On the other hand, it is only able to detect the temperature of single-point near temperature sensor installation site, the folding of whole optical fiber can not be judged
Situation is damaged, the optical fiber being laid with especially for long range；In addition, this method needs additional laying temperature sensor and detection dress
It sets, it is complicated, cost is higher, mounting process is cumbersome.
It can be seen that losing detection device using the low-cost optical fiber which kind of is easy to use to improve accuracy of detection and to expand
Big detection range is those skilled in the art's technical problem urgently to be resolved hurrily.
Utility model content
A kind of low-cost optical fiber easy to use of being designed to provide of the application loses detection device, effectively to carry
High measurement accuracy simultaneously expands detection range.
In order to solve the above technical problems, a kind of optical fiber of the application offer loses detection device, including：Convergent lens, light splitting
Mirror, the first photosensitive sensor and controller；
The convergent lens is used for incident collimated ray into line convergence, so that the light after assembling penetrates the light splitting
Mirror is incident to the incidence end of optical fiber to be detected；
It is reflected into spectroscopical reflected light from the incidence end of the optical fiber to be detected and enters first light sensor
Device, to generate first detection signal；
The controller is for judging whether the first detection signal is less than the first predetermined threshold value；If so, judgement institute
Optical fiber to be detected is stated to be lost.
It assembles optionally, spectroscopical minute surface is coated with anti-reflection film.
Optionally, the primary optical axis of spectroscopical minute surface and the convergent lens is in the position relationship of 45° angle.
Optionally, the incidence end of the optical fiber to be detected is located at the focal point of the convergent lens.
Optionally, further include the second photosensitive sensor；
Light after the convergence is incident on the reflected light after the spectroscope and enters second photosensitive sensor, so as to
Generate the second detection signal；
The controller is additionally operable to：
The input power of collimated ray described in the acquiring size for detecting signal according to described second, and according to the input work
Rate generates first predetermined threshold value.
Optionally, the controller is additionally operable to：
After judging that the first detection signal is not less than first predetermined threshold value, the first detection signal is judged
Whether the second predetermined threshold value is less than；
If so, the judgement optical fiber to be detected is bent；
Wherein, second predetermined threshold value is higher than first predetermined threshold value.
Optionally, further include：
Alarm：For alarming after the controller judges that the optical fiber to be detected is lost, to remind
User.
Optionally, the controller is additionally operable to：
The light source of the collimated ray is cut off after judging that the optical fiber to be detected is lost.
Optical fiber provided herein loses detection device：Convergent lens, spectroscope, the first photosensitive sensor and control
Device processed；The convergent lens is used for incident collimated ray into line convergence, so that the light after assembling penetrates the spectroscope
It is incident to the incidence end of optical fiber to be detected；From the incidence end of the optical fiber to be detected be reflected into spectroscopical reflected light into
Enter first photosensitive sensor, to generate first detection signal；The controller is for judging the first detection signal
Whether the first predetermined threshold value is less than；If so, the judgement optical fiber to be detected is lost.
As it can be seen that compared with the prior art, optical fiber provided herein loses detection device and is easily installed use and cost
It is relatively low, using reversibility of optical path, the reflected light work(reflected by the incidence end of optical fiber to be detected is detected by photosensitive sensor
Rate, and be compared with the first predetermined threshold value, it can obtain treating the judging result whether detection fiber is lost.The application utilizes
The high sensitivity of light-sensitive element can effectively improve accuracy of detection, also, for the detection side of light path glazing power energy variation
Formula can accurately reflect the situation of losing of whole optical fiber, effectively expand detection range and improve detectability.
Description of the drawings
Fig. 1 is lost the structure diagram of detection device by a kind of optical fiber that the embodiment of the present application provides；
Fig. 2 is lost the light path schematic diagram of detection device by a kind of optical fiber that the embodiment of the present application provides；
Fig. 3 is lost the result curve figure in detection process by a kind of optical fiber that the embodiment of the present application provides.
Specific implementation mode
The core of the application is to provide a kind of low-cost optical fiber easy to use and loses detection device, effectively to carry
High measurement accuracy simultaneously expands detection range.In order to illustrate more clearly of the technical solution in the prior art and the embodiment of the present application,
It below will be to needing attached drawing to be used to make brief introduction in the prior art and the embodiment of the present application description.Certainly, related below
A part of the embodiment in only the application of the attached drawing description of the embodiment of the present application, carrys out those of ordinary skill in the art
Say, without creative efforts, other attached drawings can also be obtained according to the attached drawing of offer, obtained other
Attached drawing also belongs to the protection domain of the application.
In order to which technical solutions in the embodiments of the present application is more clearly and completely described, below in conjunction with this Shen
Attached drawing that please be in embodiment, technical solutions in the embodiments of the present application are introduced.Obviously, described embodiment is only
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Referring to Fig. 1, Fig. 1 is lost the structure diagram of detection device by a kind of optical fiber that the embodiment of the present application provides；Packet
Include convergent lens 1, spectroscope 2, the first photosensitive sensor 3 and controller 4；
Referring to Fig. 2, Fig. 2 is lost the light path schematic diagram of detection device by a kind of optical fiber that the embodiment of the present application provides；
Convergent lens 1 is used for incident collimated ray into line convergence, so that the light after assembling is incident through spectroscope 2
To the incidence end 5 of optical fiber to be detected；
The reflected light that spectroscope 2 is reflected into from the incidence end 5 of optical fiber to be detected enters the first photosensitive sensor 3, to give birth to
At first detection signal；
Controller 4 is for judging whether first detection signal is less than the first predetermined threshold value；If so, judging optical fiber to be detected
It is lost.
Specifically, the first photosensitive sensor mentioned here is specifically as follows photodiode, phototriode, photosensitive electricity
Components, the application such as resistance are not limited thereto.Optical fiber provided herein lose detection device using light path can
Inverse property is detected come the reflected light of the incident ray to optical fiber, to judge whether the optical fiber to be detected is lost, including it is broken
It damages and fractures.Usually, in the incidence end of optical fiber and exit end, there are about 4% light energies to be reflected.Therefore, when light source institute
One timing of input power of the collimated ray of offer, the performance number of detected reflected light is also fixed.
After optical fiber occurs damaged, the light energy after breaking point will be made to subtract in the energy leakage of breaking point
It is few, and when light energy being reflected back again passes by the breaking point, will be reduced again, therefore, is emitted from the incidence end of optical fiber to be detected
The energy of reflected light will be significantly lower than without lose the testing result of optical fiber, there are one upper limit value, i.e., described first is default for tool
Threshold value.
On the other hand, after optical fiber badly broken is broken off, it is stringent that the place of fractureing just becomes not ground, polishing etc.
The processed coarse exit end of process, therefore its end face is likely to extremely uneven, similar to scatterer surface, by this
Fracture place's outgoing light angle it is disorderly and unsystematic, while the reflected light for reflexing to optical fiber incidence end be also it is mixed and disorderly unordered, therefore
The light of Partial angle will have exceeded the detection range of the first photosensitive sensor 3, and obtained first detection signal is equally
It is relatively low.
According to the above analysis, it can be seen that, no matter optical fiber to be detected occurs damaged or is broken off, and passes through the application institute
The light of offer loses detection device, can obtain effective testing result, to prevent the generation of safety accident.When what is obtained
When first detection signal is less than the first predetermined threshold value, you can judge that the optical fiber to be detected occurs losing phenomenon, that is, occur damaged
Or it is broken off.It is easily understood that first predetermined threshold value is related to the input power of collimated ray for detection, it can be by
Those skilled in the art voluntarily calculate and are arranged according to actual service condition, and equally, each laser light source module is assembling
After the completion of debugging, optical fiber can be adjusted to bending critical condition, the measured value of the first photosensitive sensor 3 can be set as the at this time
One predetermined threshold value, is automatically saved and is arranged by controller.
As it can be seen that optical fiber provided herein is lost, detection device is easily installed use and cost is relatively low, can using light path
Inverse property, by detecting the reflected optical power reflected by the incidence end 5 of optical fiber to be detected, and is compared with the first predetermined threshold value
Compared with can obtain treating the judging result whether detection fiber is lost.Present invention take advantage of that the high sensitivity of light-sensitive element can have
Effect improves accuracy of detection, also, can accurately reflect whole optical fiber for the detection mode of light path glazing power energy variation
Situation is lost, detection range is effectively expanded and improves detectability.
Optical fiber provided herein loses detection device, on the basis of the above embodiments：
It assembles
As a kind of preferred embodiment, the minute surface of spectroscope 2 is coated with anti-reflection film.
Specifically, by plating anti-reflection film for spectroscope 2, it is possible to reduce damage of light when through spectroscope 2 after convergence
Consumption, it is ensured that loss caused by spectroscope 2 will be introduced and minimized, minimum degree influences optical fiber output power.
As a kind of preferred embodiment, the minute surface of spectroscope 2 is closed with the primary optical axis of convergent lens 1 in the position of 45° angle
System.
Specifically, since the antireflective effect of anti-reflection film is related with the incident angle of light, spectroscope 2 is different to be made
The plated film with the use of different process is needed with angle.When the angle of the minute surface and the primary optical axis of convergent lens 1 of spectroscope 2 is
At 45 °, corresponding coating process is more convenient simple, therefore can be used as a kind of preferred embodiment.
It is noted that when spectroscope 2 is in different angular position relatives from the primary optical axis of convergent lens 1, by waiting for
The light path that the incidence end 5 of detection fiber reflexes to the reflected light of spectroscope 2 is also different, and therefore, it is necessary to accordingly adjust the first light
The installation site of dependent sensor 3 is detected reflected light with being located in the light path of reflected light.
It should be added that in order to reach preferable coupling effect, in light path schematic diagram as shown in Figure 2, light splitting
There is range deviation d slightly in the center of mirror 2, the center of 5 end face of incidence end of optical fiber to be detected and the primary optical axis of convergent lens 1.
This is because the light after assembling because of refraction by that can make emergent ray overall offset when spectroscope 2.It is right that the application passes through
A kind of optical fiber that the present embodiment is provided is lost detection device and is measured, and it is about 0.3mm to obtain its range deviation d.Certainly,
For instruments such as different sizes, the convergent lens 1 of model or spectroscopes 2, the size of range deviation d is not fully identical,
Those skilled in the art can be voluntarily arranged according to practical situations, and the application is not limited thereto.
As a kind of preferred embodiment, the incidence end 5 of optical fiber to be detected is located at the focal point of convergent lens 1.
Specifically, the spot diameter for being located at the focal point of convergent lens 1 is minimum, so as to couple light rays into light to be detected
Fine incidence end 5.
Further include the second photosensitive sensor as a kind of preferred embodiment；
Light after convergence is incident on the reflected light after spectroscope 2 and enters the second photosensitive sensor, to generate the second inspection
Survey signal；
Controller 4 is additionally operable to：
First is generated according to the input power of the acquiring size collimated ray of the second detection signal, and according to input power in advance
If threshold value.
Specifically, according to described previously, the watt level of the reflected light detected by the first photosensitive sensor 3 is carried with light source
The input power of the collimated ray of confession is related, and therefore, for the light source suitable for different capacity size, the application can also lead to
The second photosensitive sensor is crossed to obtain the input power of light source, can then be given birth to by controller 4 to be calculated according to input power size
At corresponding first predetermined threshold value.The light that second light sensor implement body can be used for detecting after assembling is incident on spectroscope
Reflected light after 2, and then the input power of light source is calculated according to the ratio of reflected light.
As a kind of preferred embodiment, controller 4 is additionally operable to：
After judging that first detection signal is not less than the first predetermined threshold value, judge whether first detection signal is less than second
Predetermined threshold value；
If so, judging that optical fiber to be detected is bent；
Wherein, the second predetermined threshold value is higher than the first predetermined threshold value.
Specifically, it when optical fiber is not yet lost in flexuosity, is obtained by the detection of the first photosensitive sensor 3
Although first detection signal can be higher than the first predetermined threshold value, as bending scattering loss and than optical fiber normal extension
When detected value want low (referring to Fig. 3).When fibre-optical bending, the energy of light is likely to gather and then keeps optical fiber damaged, and
And radius bend is smaller, the degree and possibility of damage are higher.Therefore, optical fiber detector provided herein can be with
The flexuosity of optical fiber is detected, so that user carries out respective handling in time, avoids causing losing for optical fiber.
Second predetermined threshold value mentioned here is equally related with the input power of light source, and can be by those skilled in the art
According to actual use situation voluntarily calculating and setting, or the measured value guarantor by photosensitive sensor 3 in the free extended configuration of optical fiber
It deposits and is set as the second predetermined threshold value.
Referring to Fig. 3, Fig. 3, which is optical fiber provided herein, loses the result curve figure in detection process；Wherein horizontal axis
Indicate that detection time, the longitudinal axis indicate the measured value of first detection signal.
As shown in figure 3, v2 is the measured value obtained in normal extension without the optical fiber lost, it is as previously described
Second predetermined threshold value.Before time tl, optical fiber is stretched by continuous alternating bending, and obtained first detection signal is concussion
Curve.In t1 to t2 periods, fibre-optical bending reaches stable, to measure at this time first detection signal afterwards to a certain extent
Size is stablized in v1, i.e. described the first predetermined threshold value above；After instant t 2, optical fiber is lost, first detection signal
It is gradually reduced by v1 until fractureing, and gone up after breaking off, until reaching stable after the t3 moment；Also, it can be with
Find out, the steady-state value after fractureing will be less than v1 i.e. the first predetermined threshold value.
As a kind of preferred embodiment, further include：
Alarm：For judging that optical fiber to be detected is alarmed after being lost in controller 4, to remind user.
Preferably, light provided herein, which loses detection device, to lose situation to optical fiber using alarm
Warning reminding is carried out, such as the alerting patterns such as buzzer, indicator light can be used, the embodiment of the present application is to this and without limit
It is fixed.
As a kind of preferred embodiment, controller 4 is additionally operable to：
The light source of collimated ray is cut off after judging that optical fiber to be detected is lost.
Specifically, the controller 4 in the application can also be in the first time cut-out for detecting that optical fiber to be detected is lost
The light source of collimated ray continues to ferment, further increases safety to avoid accident.
Each embodiment is described by the way of progressive in the application, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.
It should be noted that in present specification, the relational terms of such as " first " and " second " etc are used merely to
One entity is either operated and is distinguished with another entity or operation, without necessarily requiring or implying these entities or
There are any actual relationship or orders between person's operation.In addition, the terms "include", "comprise" or its any other
Variant is intended to non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only
Including those elements, but also include other elements that are not explicitly listed, or further includes for this process, method, object
Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...",
It is not precluded in the process, method, article or apparatus that includes the element that there is also other identical elements.
Technical solution provided herein is described in detail above.Specific case used herein is to this Shen
Principle and embodiment please is expounded, the explanation of above example is only intended to help understand the present processes and
Its core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the application principle
Under, can also to the application, some improvement and modification can also be carried out, these improvement and modification also fall into the protection of the application claim
In range.
Claims (8)
1. a kind of optical fiber loses detection device, which is characterized in that including convergent lens, spectroscope, the first photosensitive sensor and control
Device processed；
The convergent lens is used for incident collimated ray into line convergence, so that the light after assembling enters through the spectroscope
It is incident upon the incidence end of optical fiber to be detected；
It is reflected into spectroscopical reflected light from the incidence end of the optical fiber to be detected and enters first photosensitive sensor, with
Just first detection signal is generated；
The controller is for judging whether the first detection signal is less than the first predetermined threshold value；If so, being waited for described in judgement
Detection fiber is lost.
2. optical fiber according to claim 1 loses detection device, which is characterized in that spectroscopical minute surface is coated with anti-reflection
Film.
3. optical fiber according to claim 2 loses detection device, which is characterized in that spectroscopical minute surface and the meeting
The primary optical axis of poly- lens is in the position relationship of 45° angle.
4. optical fiber according to claim 3 loses detection device, which is characterized in that the incidence end position of the optical fiber to be detected
In the focal point of the convergent lens.
5. optical fiber according to any one of claims 1 to 4 loses detection device, which is characterized in that further include second photosensitive
Sensor；
Light after the convergence is incident on the reflected light after the spectroscope and enters second photosensitive sensor, to generate
Second detection signal；
The controller is additionally operable to：
The input power of collimated ray described in the acquiring size for detecting signal according to described second, and given birth to according to the input power
At first predetermined threshold value.
6. optical fiber according to claim 5 loses detection device, which is characterized in that the controller is additionally operable to：
After judging that the first detection signal is not less than first predetermined threshold value, whether the first detection signal is judged
Less than the second predetermined threshold value；
If so, the judgement optical fiber to be detected is bent；
Wherein, second predetermined threshold value is higher than first predetermined threshold value.
7. optical fiber according to claim 5 loses detection device, which is characterized in that further include：
Alarm：For alarming after the controller judges that the optical fiber to be detected is lost, to remind user.
8. optical fiber according to claim 5 loses detection device, which is characterized in that the controller is additionally operable to：
The light source of the collimated ray is cut off after judging that the optical fiber to be detected is lost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721788761.3U CN207649879U (en) | 2017-12-19 | 2017-12-19 | A kind of optical fiber loses detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721788761.3U CN207649879U (en) | 2017-12-19 | 2017-12-19 | A kind of optical fiber loses detection device |
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| Publication Number | Publication Date |
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| CN207649879U true CN207649879U (en) | 2018-07-24 |
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ID=62877382
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181089A (en) * | 2017-12-19 | 2018-06-19 | 北京镭创高科光电科技有限公司 | A kind of optical fiber loses detection device and method |
-
2017
- 2017-12-19 CN CN201721788761.3U patent/CN207649879U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181089A (en) * | 2017-12-19 | 2018-06-19 | 北京镭创高科光电科技有限公司 | A kind of optical fiber loses detection device and method |
| CN108181089B (en) * | 2017-12-19 | 2024-01-16 | 江苏镭创高科光电科技有限公司 | Optical fiber breakage detection device and method |
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Address after: Room 401, room 402, building 1, Zone C, industrial square, science and Technology City, 588 Wutaishan Road, high tech Zone, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu radium Technology Co.,Ltd. Address before: 100176 Room 301, 3 / F, building 28, yard 18, Kechuang 13th Street, economic and Technological Development Zone, Daxing District, Beijing Patentee before: BEIJING LITRONICS OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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