CN102447511A - Light path tester - Google Patents
Light path tester Download PDFInfo
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- CN102447511A CN102447511A CN2010105069062A CN201010506906A CN102447511A CN 102447511 A CN102447511 A CN 102447511A CN 2010105069062 A CN2010105069062 A CN 2010105069062A CN 201010506906 A CN201010506906 A CN 201010506906A CN 102447511 A CN102447511 A CN 102447511A
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Abstract
The invention relates to a light path tester, which comprises a shell body, a power supply device, a light signal display circuit, an optical module and a light receiving detection circuit, wherein the optical module is provided with a light input interface and an output level interface; the light receiving detection circuit is connected with the output level interface and the light signal display circuit; the power supply device supplies power to the optical module and the light receiving detection circuit; the optical module further comprises a light output interface and an input level interface for optical signal illumination; and the power supply device, the optical module and the light receiving detection circuit are all accommodated in the shell body. Compared with the existing optical tester, the light path tester adopts qualitative test and indicating lamp display to judge whether the optical signal exists or not, the requirements on test precision, test display and maintenance personnel quality are reduced, the manufacturing cost is far lower than the price of the existing optical tester, the requirement of light path detection can be satisfied, the maintenance cost and investment are also greatly saved, and furthermore, more economic benefit is produced.
Description
Technical field
The present invention relates to the network communications technology, relate in particular to a kind of EPON optical test path appearance of (Passive Optical Network is called for short PON) that is applied to.
Background technology
Along with the fast development of Internet, the network user is to the demand increase of the network bandwidth, and the broadband user not merely satisfies common website browsing.High-quality IPTV service interfacing is gone into the requirement, user of bandwidth becomes mainstream applications gradually to the demand of upstream rate, video conference, high-speed downloads etc.In order to satisfy the needs in market; Huge variation has taken place in the core net part of communication network; Become the bottleneck in the whole network and change less traditional Access Network (Access Network mainly refers to the network from the telecommunications room to the user side) always; Various new broadband access technologys become the focus of research, and the FTTH that utilizes PON to carry out networking becomes present main flow access way.
PON is a kind of novel Optical Access Network technology; It adopts point to multipoint configuration, passive fiber transmission; Multiple business is provided on Ethernet; Not only broadband services can be provided, also voice service can be provided simultaneously, the PON network has low cost, high bandwidth, autgmentability characteristics strong, that serve fast flexibly.
Because numerous advantages of PON, it more and more receives people's favor, is about to become a kind of the most effectively communication means of broadband access network.When each telecom operators provides broadband access network and voice service at the same time at present, also saved the copper cable resource of a large amount of costlinesses, newly-built sub-district adopts the PON technology to insert basically.How having served these PON users that increase rapidly is each telecom operators' most important thing.
The transmission characteristic of PON access technology is as shown in Figure 1.Local side OLT (optical line terminal) light signal process output port A receives the B mouth of ODF (Optical Distribution Frame is called for short ODF) jumping fiber frame 1 again through jumping fiber, the B mouth is received the C mouth of ODF jumping fiber frame 1 through jumping fiber; The C mouth is connected to the D mouth of ODF jumping fiber frame 2 through optical fiber; Arrive the E mouth through jumping fiber again, the E mouth inserts backbone optical cable again, and backbone optical cable arrives light and hands over the light fibre melting disc 1 in the case; Light fibre melting disc 1 arrives the G mouth of light fibre melting disc 2 through jumping fiber through the F mouth; Light fibre melting disc 2 is through the light fibre melting disc 3 in the optical fiber arrival floor light junction box, and light fibre melting disc 3 is through the input I mouth of H mouth through jumping fiber arrival optical splitter, and optical splitter arrives the K mouth of light fibre melting disc 4 through delivery outlet J; Light fibre melting disc 4 arrives the light fibre melting disc 5 in the users home multimedia-box through optical fiber; Light fibre melting disc 5 is through the input port M of delivery outlet L arrival ONU (optical network unit), and ONU accomplishes opto-electronic conversion, inserts PC through netting twine.
One road PON subscriber signal is transferred to user ONU from OLT must pass through ODF jumping fiber frame 1, ODF jumping fiber frame 2, light friendship case, floor junction box, customer multi-media box.So when can not receive the OLT light signal in the users home.Light signal might OLT switch to ODF jumping fiber frame 1, ODF jumping fiber frame 1 to ODF jumper wire rack 2, ODF jumping fiber frame 2 to light hand over case, light hand over jumping fiber, light in the case hand over case in floor junction box, the floor light junction box in the ODF jumping fiber or floor fiber distribution box stop to transmit backward in the multistage optical cable in the customer multi-media box etc.When user ONU can not receive light signal, for detection failure, need carry out signal measurement with instrument piecemeal at above-mentioned section, so that remove barriers fast, the test point that possibly relate to is points such as A, B, C, D, F, J, K, L, M.
Because the PON technology is to utilize optical cable to carry out transfer of data, this transmission technology is different from the cable transmission technology fully, needs the test instrumentation of configure dedicated just can carry out corresponding engineering and maintenance.And present optical tests instrument adopts professional instrument basically, and it is high to required precision, support multi-wavelength, and is provided with display screen, a lot of operation keyss etc. are arranged; But this also causes its complex structure, and volume is big, operates loaded down with trivial details; With high costs; Price can can't spread to one of attendant's staff up to several thousand yuan every, and is also very inconvenient, all the more so when operating especially out of doors in use.
Summary of the invention
The inventor is to Fiber to the home (Fiber To The Home; Abbreviation FTTH) in the actual investigation and test of installation and maintenance; In the test process of discovery to the PON light path, the concrete light intensity value that traditional optical tests instrument shows not is the emphasis of test, and maintenance personnel's care is 2 points; The one, whether this section circuit has light to come, and the 2nd, whether luminous intensity can satisfy ONU equipment work threshold value.And in the process of handling failure, add up, 85% obstacle can just can carry out fault location and processing through having judged whether light signal.
In other words, a lot of functions that traditional optical tests instrument is had do not need for the test of Access Layer optical fiber, for example support the multi-wavelength; The configuration display screen, the precision of having relatively high expectations etc. only need to support the service band of particular range of wavelengths in reality test; Require lower to measuring accuracy; Also do not need display screen to show, therefore through in the test view, only the test effect that simple and practical test function just can reach the PON light path being set, this not only can greatly reduce the cost of tester; And on volume, also can reduce, thereby be convenient for carrying.
The objective of the invention is to propose a kind of optical test path appearance, have with low cost, volume is little, be easy to carry about with one and operate the characteristics of being convenient to popularize.
For realizing above-mentioned purpose, the invention provides a kind of optical test path appearance, comprising:
Housing;
Power supply device;
The light signal display circuit;
Optical module has a smooth input interface and an output level interface, and said optical module is used to detect the light signal that said smooth input interface receives, and through the corresponding level signal of said output level interface output;
Receive optical detection circuit, link to each other with the light signal display circuit, be used for selecting to trigger or do not trigger the light signal display circuit according to the level signal that receives with said output level interface;
Said power supply device is that said optical module provides power supply with the receipts optical detection circuit;
Said power supply device, optical module, receipts optical detection circuit all are contained in the said housing.
Further, said power supply device comprises battery flat, in said battery flat, can install the battery of predetermined number and specification.
Optional, said power supply device comprises rechargeable battery and is the charging circuit of said rechargeable battery charging.
Further, said optical module also has a smooth output interface and a high-frequency signal input interface, and said optical module also is used to receive the high-frequency signal that said high-frequency signal input interface receives, and through said smooth output interface output light signal.
Further, comprise also that in said housing high-frequency signal produces circuit, the signal output that said high-frequency signal produces circuit links to each other with the high-frequency signal input interface of said optical module.
Preferably, said high-frequency signal produces circuit and comprises crystal oscillating circuit, shaping circuit and signal level match circuit, and said crystal oscillating circuit, shaping circuit and signal level match circuit link to each other successively.
Preferably, said high-frequency signal produces circuit and also is connected with the high-frequency signal display circuit, when the said high-frequency signal of connection produces circuit, is triggered.
Optional, also be serially connected with the attenuator that outside said housing, is provided with or in said housing, is provided with at the light input interface of said optical module, be used for the cleaning door limit value of said optical test path appearance is regulated.
Optional, in said housing, also comprise undervoltage detection circuit, be used for the supply voltage of said power supply device is detected, and undervoltage condition is carried out alarm.
Preferably, said undervoltage detection circuit also is connected with under-voltage signal display circuit, when detecting undervoltage condition, is triggered.
Based on technique scheme; Optical test path appearance of the present invention is than existing optical tests instrument; Adopt qualitative test and indicator light to show and judge having or not of light signal; It is just passable that the precision of optical module only needs and the light precision of ONU equipment is consistent, and can significantly reduce the requirement to the optical module precision like this, and the minimum threshold of the optical gate limit value of tester and ONU operate as normal is consistent or very near its work thresholding; For this reason as long as tester shows light; Must be the qualified light signal strength that meets the ONU operate as normal just, not need the attendant to go to be concerned about concrete parameter, reduce requirement measuring accuracy, test demonstration and attendant's quality.Optical test path appearance of the present invention can be applied in a large amount of at present FTTH that build of common carrier; Its inner required parts are less; And to precision, wavelength kind require low, also lower to the requirement that shows, so cost is far below the price of existing optical tests instrument.And along with FTTH becomes the main construction mode in broadband of common carrier, therefore optical test path appearance of the present invention not only can satisfy the demand that light path detects, and has greatly practiced thrift maintenance cost and investment, and then produces bigger economic benefit.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the transmission sketch map of existing PON access technology.
Fig. 2 is the structural representation of an embodiment of optical test path appearance of the present invention.
Fig. 3 is the structural representation of another embodiment of optical test path appearance of the present invention.
Fig. 4 is the structural representation of an embodiment again of optical test path appearance of the present invention.
Fig. 5 is the structural representation of the another embodiment of optical test path appearance of the present invention.
Embodiment
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
The front is mentioned, and the inventor is in the actual investigation of FTTH installation and maintenance and test, and what find maintenance personnel in the test process of PON light path is concerned about most is whether this section circuit has light to come, and whether luminous intensity can satisfy ONU equipment work threshold value.And in the process of handling failure, add up, 85% obstacle can just can carry out fault location and processing through having judged whether light signal.
Based on these actual conditions, the present invention designs the inside of optical test path appearance again and forms, and is as shown in Figure 2, is the structural representation of an embodiment of optical test path appearance of the present invention.In the present embodiment, the optical test path appearance comprises housing 1, in housing 1, accommodates power supply device 2, light signal display circuit 3, optical module 4 and receives optical detection circuit 5.Power supply device 2 provides power supply for optical module 4 and receipts optical detection circuit 5.
Receive optical detection circuit 5 and link to each other with light signal display circuit 3, receive optical detection circuit 5 and can select to trigger or do not trigger light signal display circuit 3 according to the level signal that receives with output level interface 42.For the given optical module example in front, the input signal of receiving optical detection circuit comes from the level signal of the loss of gloss alarm interface output of optical module.Receiving optical detection circuit can be made up of with voltage clamp circuit signal comparator circuit (for example LM339 etc.), through the reference voltage of voltage clamp circuit setting comparison circuit.Utilize comparison circuit to the voltage of level signal relatively realize judgement that light signal is had or not, and drive relevant display circuit with this.
In actual use; If user ONU can not receive light signal; The attendant receives newspaper barrier, then begins to utilize optical test path appearance of the present invention to carry out light path row barrier from user side, can begin piecemeal the test light signal according to the network characteristics of FTTH the light input interface of optical module is received the light transit point.If light is not received in the indication of optical test path appearance, just proceed to upper reaches light transit point and test, when finding that certain light transit point has light signal, but its downstream first do not have the light transit point of light signal, just can judge that this light transit point is the fault point.
If the optical test path appearance detects the light signal that the light input interface receives, and, receive optical detection circuit and select to trigger the light signal display circuit according to the level signal (high level) that receives through the corresponding level signal (for example high level) of output level interface output; If do not detect the light signal that the light input interface receives, and, receive optical detection circuit and select not trigger the light signal display circuit according to the level signal (low level) that receives through the corresponding level signal (for example low level) of output level interface output.
Optical module has the sensitivity of accepting of regulation usually, for example-23dbm, promptly has only light signal greater than-23db the time, can be detected by optical module.The normal light signal probably can reach-16 from OLT to user～-23db, if there is not fault, then can clearly be detected by optical test path appearance of the present invention.Optical module adopts present obtainable optical module.
The light signal display circuit can adopt LED lamp simple in structure, and the light on and off through the LED lamp show whether this light transit point has light signal; Also can adopt other indicating mode, for example small-sized liquid crystal display screen for example has light, unglazedly comes the pilot light signal to have or not through the screen display specific character.These circuit all need not carry out analog-to-digital conversion, thereby the concrete numerical value of accurate display light intensity has been practiced thrift the whole cost of optical test path appearance, and are therefore practical and cheap.
As shown in Figure 3, be the structural representation of another embodiment of optical test path appearance of the present invention.Compare with a last embodiment, the optical module 4 of present embodiment also has a smooth output interface 43 and a high-frequency signal input interface 44, and optical module 4 can receive the high-frequency signal that high-frequency signal input interface 44 receives, and through light output interface 43 output light signals.
High-frequency signal input interface 44 can join with the high-frequency signal of outside, also can produce circuit 6 with the built-in high-frequency signal of optical test path appearance and link to each other.High-frequency signal produces circuit 6 and also is connected with high-frequency signal display circuit 7, and high-frequency signal display circuit 7 can adopt LED lamp simple in structure, produces when that is to say that light signal sends when circuit 6 is connected at high-frequency signal, and high-frequency signal display circuit 7 is triggered and luminous.High-frequency signal produces circuit 6 and can adopt crystal oscillating circuit to realize, but the signal that crystal oscillating circuit produces can't directly drive optical module, needs to import optical module again through behind the shaping circuit.
Implementation is crystal oscillating circuit+shaping circuit, and wherein shaping circuit can be made up of similar modules such as 7406 or 7404, and the high-frequency signal that is used for producing crystal oscillating circuit amplifies that to drive optical module afterwards luminous.Optical module for some classifications; For example ocm3511 its need the PECL level (be the voltage jump scope be 3.7～4.2v) input; Can insert a signal level match circuit (for example PECL level shifting circuit) this moment behind shaping circuit; For example SY10ELT22 changes the change in voltage that converts 3.7～4.2v into to 0～4v of previous module generation.
Than last embodiment, present embodiment also possesses lighting function, can simulate the local side light signal, is not having under the light source situation, and two optical test path appearance can be received and dispatched each other, can detect the quality of optical splitter and wall scroll light path.
As shown in Figure 4, be the structural representation of an embodiment again of optical test path appearance of the present invention.Compare with several embodiment of front, the light input interface 41 of the optical module 4 of present embodiment can also be connected in series attenuator 8, when the work thresholding of optical module (for example-25db) lower than specified thresholds; In other words; The sensitivity of optical module for example can reach-during 35db, at this moment can decay earlier through the light signal that attenuator 8 will get into light input interface 41, and 10db for example decays; Thereby make optical module adapt to different specified thresholds, make its sensitivity be adjusted to-25db near.
Attenuator 8 can be provided with outside housing 1, also can in housing 1, be provided with.Concerning the user, the mode of peripheral hardware can be more convenient the degree of adjustment decay, built-in mode then cost is cheaper.Therefore consider that the undertension of optical test path appearance can have influence on the test of light signal, can also in the optical test path appearance, add undervoltage detection circuit, as shown in Figure 5, be the structural representation of the another embodiment of optical test path appearance of the present invention.Present embodiment has increased undervoltage detection circuit 9 than preceding several embodiment in housing, can the supply voltage of power supply device 2 be detected, and undervoltage condition is carried out alarm.Undervoltage detection circuit 9 can also connect under-voltage signal display circuit 10, and under-voltage signal display circuit 10 is triggered and is luminous when undervoltage detection circuit 9 detects undervoltage condition.Undervoltage detection circuit can be made up of voltage clamp circuit (for example TL431 etc.) and comparison circuit (for example LM339); Can set the reference voltage of comparison circuit through voltage clamp circuit; Through relatively supply power voltage and reference voltage, accomplish whether can operate as normal to supply power voltage interpretation.
In the technical scheme of above-mentioned each embodiment, the switching circuit that is adopted both can adopt mechanical, also can adopt monostable circuit.The mode of monostable circuit mainly is to realize that through the NE555 module electronics triggers high-frequency signal and produces the open-minded of circuit; Than mechanical switch; Only need gently button to be clicked just to realize control, control more reliable, safe and light illuminating circuit.
In sum, optical test path appearance of the present invention has the following advantages:
1, all can to adopt be the circuit common element to the employed various circuit of optical test path appearance of the present invention, realizes through specific connected mode that light signal receives and differentiate and send that scheme is simple and practical;
2, optical test path appearance of the present invention can possess optical transmit-receive function simultaneously, becomes the duplexing instrument that light transmits and receives;
3, optical test path appearance of the present invention is because inner circuit is simple, compact conformation, and it is little, easy to carry, simple to operate therefore to take up room;
4, the price of the optical module that adopted of optical test path appearance of the present invention and peripheral circuit is all very cheap, so the separate unit cost is much lower than existing test instrumentation, therefore can produce in a large number and duplicate, and can extensively promote;
5, optical test path appearance of the present invention only just can be accomplished optical signal detecting through less electrical energy, and equipment power dissipation is low, and stand-by time is long.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be contained, for example relatively and the similar functions such as generation of high-frequency signal through the chip microcontroller signal, in the middle of the technical scheme scope that the present invention asks for protection.
Claims (10)
1. optical test path appearance comprises:
Housing;
Power supply device;
The light signal display circuit;
Optical module has a smooth input interface and an output level interface, and said optical module is used to detect the light signal that said smooth input interface receives, and through the corresponding level signal of said output level interface output;
Receive optical detection circuit, link to each other with the light signal display circuit, be used for selecting to trigger or do not trigger the light signal display circuit according to the level signal that receives with said output level interface;
Said power supply device is that said optical module provides power supply with the receipts optical detection circuit;
Said power supply device, optical module, receipts optical detection circuit all are contained in the said housing.
2. optical test path appearance according to claim 1, wherein, said power supply device comprises battery flat, in said battery flat, can install the battery of predetermined number and specification.
3. optical test path appearance according to claim 1, wherein, said power supply device comprises rechargeable battery and is the charging circuit of said rechargeable battery charging.
4. optical test path appearance according to claim 1; Wherein, Said optical module also has a smooth output interface and a high-frequency signal input interface, and said optical module also is used to receive the high-frequency signal that said high-frequency signal input interface receives, and through said smooth output interface output light signal.
5. optical test path appearance according to claim 4 wherein, comprises also that in said housing high-frequency signal produces circuit, and the signal output that said high-frequency signal produces circuit links to each other with the high-frequency signal input interface of said optical module.
6. optical test path appearance according to claim 4, wherein, said high-frequency signal produces circuit and comprises crystal oscillating circuit, shaping circuit and signal level match circuit, and said crystal oscillating circuit, shaping circuit and signal level match circuit link to each other successively.
7. according to claim 5 or 6 described optical test path appearance, wherein, said high-frequency signal produces circuit and also is connected with the high-frequency signal display circuit, when the said high-frequency signal of connection produces circuit, is triggered.
8. optical test path appearance according to claim 1 wherein, also is serially connected with the attenuator that outside said housing, is provided with or in said housing, is provided with at the light input interface of said optical module, is used for the cleaning door limit value of said optical test path appearance is regulated.
9. optical test path appearance according to claim 1 wherein, also comprises undervoltage detection circuit in said housing, be used for the supply voltage of said power supply device is detected, and undervoltage condition is carried out alarm.
10. optical test path appearance according to claim 9, wherein, said undervoltage detection circuit also is connected with under-voltage signal display circuit, when detecting undervoltage condition, is triggered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010506906.2A CN102447511B (en) | 2010-10-14 | 2010-10-14 | Light path tester |
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| CN201010506906.2A CN102447511B (en) | 2010-10-14 | 2010-10-14 | Light path tester |
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| CN102447511A true CN102447511A (en) | 2012-05-09 |
| CN102447511B CN102447511B (en) | 2015-05-13 |
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| CN103051379A (en) * | 2013-01-06 | 2013-04-17 | 青岛海信宽带多媒体技术有限公司 | Optical module debugging system |
| CN104144012A (en) * | 2013-05-10 | 2014-11-12 | 中国电信股份有限公司 | Optical property detecting system and method of FTTx access network |
| CN104218987A (en) * | 2013-05-31 | 2014-12-17 | 中国电信股份有限公司 | Optical link detecting method, system and detector in passive optical network |
| CN106357328A (en) * | 2016-08-26 | 2017-01-25 | 四川九州电子科技股份有限公司 | Detecting device for input optical power of set-top box |
| CN112865860A (en) * | 2021-01-05 | 2021-05-28 | 深圳市双翼科技股份有限公司 | Calibration method and device for trillion passive optical network BOB equipment |
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| CN112865860A (en) * | 2021-01-05 | 2021-05-28 | 深圳市双翼科技股份有限公司 | Calibration method and device for trillion passive optical network BOB equipment |
| CN112865860B (en) * | 2021-01-05 | 2022-04-26 | 深圳市双翼科技股份有限公司 | Calibration method and device for trillion passive optical network BOB equipment |
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| CN102447511B (en) | 2015-05-13 |
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