CN103873141B - Optical fiber and digital OTDR detection method and device - Google Patents
Optical fiber and digital OTDR detection method and device Download PDFInfo
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- CN103873141B CN103873141B CN201210531731.XA CN201210531731A CN103873141B CN 103873141 B CN103873141 B CN 103873141B CN 201210531731 A CN201210531731 A CN 201210531731A CN 103873141 B CN103873141 B CN 103873141B
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Abstract
The present invention relates to a kind of optical fiber and digital OTDR detection method and device, this device is arranged on light net main control chip, including receiver module, sending module, configuration module and memory modules, configuration module is that receiver module configuration receives control parameter, sends for sending module configuration and controls parameter；Receiver module receives the parallel data sent from outside light-receiving and A/D modular converter and caches, and controls parameter according to receiving, samples parallel data, and preserves sampled data to memory modules；Sending module is according to sending control parameter, and from configuring, acquisition configuration data module carry out parallel-serial conversion, odd even controls and path selection, the optical transmission module outside to send sequence transmission.The present invention, in the way of digital module, can realize OTDR function on the main control chip of optical-fiber network, meet the construction demand of optical-fiber network, save optical fiber detector development time and cost, improve the flexibility ratio of optical fiber detector, accuracy.
Description
Technical field
The present invention relates to technical field of optical fiber communication, particularly relate to a kind of optical fiber and digital OTDR detection method
And device.
Background technology
The light net of optical-fiber network such as GPON, EPON is popularized energetically, therefore to the optical fiber laid at present
Quality testing then become a critically important problem.
The method of the most a lot of fiber laser arrays is all interpolation OTDR(Optical T outside existing equipment
Ime Domain Reflectometer, optical time domain reflectometer) equipment.Tradition OTDR is profit
Backscattering produced by Rayleigh scattering when transmitting in a fiber with light and Fresnel reflection and
The electrical integrated instrument of precise light made, it is widely used in the maintenance of lightguide cable link, construction
Among, fiber lengths, the transmission attenuation of optical fiber, joint decay and fault location etc. can be carried out
Measure.But, existing this OTDR equipment costly, operates also inconvenient, increases
Add operation expense.
Summary of the invention
A kind of low cost of offer and easy to operate optical fiber and digital OTDR inspection are provided
Survey method and device.
In order to achieve the above object, the present invention proposes a kind of optical fiber and digital OTDR and detects device, is arranged on
On light net main control chip, including: receiver module, sending module, configuration module and memory modules
, wherein:
Described configuration module controls parameter, for described transmission mould for receiving for the configuration of described receiver module
Block configuration sends and controls parameter；
Described receiver module is for receiving send and line number from outside light-receiving and A/D modular converter
According to and cache, according to described receive control parameter, described parallel data is sampled, and will
Sampled data preserves to described memory modules；
Described sending module, for controlling parameter according to described transmission, obtains configuration number from configuration module
Select according to carrying out parallel-serial conversion, odd even control and path, to send sequence transmission to outside light
Sending module.
Preferably, the inside that described sending module is additionally operable to according to described transmission selection of control parameter is returned
Logical
Road, sends described transmission sequence to described receiver module.
Preferably, described configuration module is provided with user's access interface, and described configuration module is additionally operable to pass through
Described user's access interface receives user's input information and carries out parameter configuration.
Preferably, described receive control parameter at least include: receive the RAM degree of depth, receive postpone point and soft
Reset configuration information；The described control parameter that sends at least includes: sends starting point, send sequence
Content, transmission sequence length, transmission sequence rate, inside and outside path and transmission odd even configuration letter
Breath.
Preferably, described receiver module is additionally operable to when described sending module starts and sends start counting up,
Open sampling window when count value reaches and receives the numerical value postponing some configuration and carry out data sampling.
Preferably, described receiver module is additionally operable to when writing address ram less than the number receiving the configuration of the RAM degree of depth
During value, preserve data to the reception RAM of memory modules；When writing address ram equal to receiving the RAM degree of depth
Stop preserving data during the numerical value configured, and export the signal preserved for user's inquiry.
The present invention also proposes a kind of optical fiber and digital OTDR detection method, including:
Receive the parallel data sent from outside light-receiving and A/D modular converter and cache, according to joining
The reception put controls parameter, samples described parallel data, and sampled data is preserved extremely
Memory modules；
Transmission according to described configuration controls parameter, obtains configuration parameter and carry out and go here and there from configuration module
Conversion, odd even control and path selects, to send sequence transmission to outside optical transmission module.
Preferably, the method also includes:
Path is returned in inside according to described transmission selection of control parameter, described transmission sequence is sent extremely
Described receiver module.
Preferably, the parallel data that described reception sends from outside light-receiving and A/D modular converter is also
Also include before the step of caching:
Receive user's input information by described user's access interface and carry out parameter configuration.
Preferably, described receive control parameter at least include: receive the RAM degree of depth, receive postpone point and soft
Reset configuration information；The described control parameter that sends at least includes: sends starting point, send sequence
Content, transmission sequence length, transmission sequence rate, inside and outside path and transmission odd even configuration letter
Breath.
Preferably, the described step sampling parallel data includes: open when starting and sending data
Begin counting, opens sampling window number when count value reaches and receives the numerical value postponing some configuration
According to sampling.
Preferably, the described step by sampled data preservation to memory modules includes:
When writing address ram less than the numerical value receiving the configuration of the RAM degree of depth, to the reception of memory modules
RAM preserves data；Stop preserving number when writing address ram equal to the numerical value receiving the configuration of the RAM degree of depth
According to, and export the signal preserved for user's inquiry.
A kind of optical fiber and digital OTDR detection method of present invention proposition and device, in the way of digital module
, the main control chip of optical-fiber network can realize the function of OTDR, it is not necessary to outside traditional fiber
Detection device, the most easy and simple to handle, and the construction meeting day by day fast-developing optical-fiber network need to
Ask；Compared to existing technology, achieve the progress at digital module design aspect, reached flexible
The changeable effect meeting customization, saves time and the cost of optical fiber detector exploitation,
Improve the flexibility ratio of optical fiber detector, accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of optical fiber and digital OTDR of the present invention detection device one embodiment；
Fig. 2 is the schematic flow sheet of optical fiber and digital OTDR detection method one embodiment of the present invention.
Detailed description of the invention
The solution main thought of the embodiment of the present invention is: owing to mostly existing light net main control chip is
ASIC or fpga chip, can add extra digital module according to user, it can be considered to
(optical fiber and digital OTDR the most of the present invention detects device to add digital module on main control chip
), the function of simulation OTDR.
As it is shown in figure 1, a kind of optical fiber and digital OTDR that one embodiment of the invention proposes detects device, arrange
On light net main control chip, including: receiver module 101, sending module 104, configuration module 10
3 and memory modules 102, wherein:
Receiver module 101 is connected with outside light-receiving and A/D modular converter 105, sending module 104 with
Outside optical transmission module 106 connects.
Described configuration module 103 controls parameter, for described for receiving for the configuration of described receiver module 101
Sending module 104 configuration sends and controls parameter；
Described receiver module 101 sends also from outside light-receiving and A/D modular converter for receiving
Row data also cache, and control parameter according to described reception, sample described parallel data,
And sampled data is preserved to described memory modules 102；
Described sending module 104, for controlling parameter according to described transmission, obtains from configuration module 103
Configuration data carry out parallel-serial conversion, odd even controls and path selects, to send sequence transmission to outward
The light in portion
Sending module 106.
Specifically, the present embodiment optical fiber and digital OTDR detection device can be with the design of digital module
Being added on the main control chip of optical-fiber network, the present embodiment is to this numeral mould with hardware description language
Block is designed, and specifically can be designed with Verilog HDL language, and this digital module can spirit
Live and be divided into above-mentioned several little module, including sending module 104, receiver module 101, configuration module
103 and memory modules 102.
Each little module specific design method and function are as follows:
Configuration module 103 provides user's access interface and internal configuration registers, the such as CP shown in Fig. 1
U interface module, it is also possible to change other interfaces into, to facilitate user to carry out the configuration of some parameters.
Wherein cpu i/f module provides the interface communicated with external chip, and usually cpu bus connects
Mouthful.By this module, user can configure the depositor that some are internal, and transmission as shown in Figure 1 rises
Initial point configuration 0, transmission sequence content 1, transmission sequence length configuration 2, transmission sequence rate configuration
3, inside and outside via configuration 4, reception RAM degree of depth configuration 5, reception postpone some configuration 6, a warm reset
Configuration 7 and transmission odd even configuration 8.
Sending module 104 comprises sending module 1040, sending module 1041, sending module 1042, each
Module is independently controlled by the parameter configured inside module 103, such as, control the length that optical signal sends
, content, speed, starting point etc.；Sending module 1040 upstate machine realizes, parallel-serial conversion
Part can use shift register to realize；Sending module 1041 selects 1 selector to realize with 12；Send out
Sending module 1042 to select 1 selector to realize with 12, user can by configuring inside and outside via configuration 4
To select to use external hardware path or internal loopback path.
Receiver module 101 can be divided into receiver module 1010, receiver module 1011, receiver module 1012, often
Individual module is also by the state modulator configured inside module 103, such as, control the light that sampling is received
The sampling length of signal, sampling time point etc..
Wherein, receiver module 1010 realizes with 1 buffer, the reception parallel data 0 shown in Fig. 1 and connecing
The clock frequency numerical value receiving parallel data 1 should equally, and phase place can be different；Receiver module 1011 can
Use 1 enumerator to realize, start counting up when sending module 1040 starts and sends when, at meter
Numerical value reaches to open sampling window when of receiving the numerical value postponing some configuration 6, it is allowed to sampled data
It is saved in inside reception RAM；Receiver module 1012 can use 1 comparator to realize, when writing RAM ground
Location continues to preserve data toward RAM when that the RAM degree of depth configuring 5 less than receiving；When writing address ram etc.
Stop preserving data in receiving the when that the RAM degree of depth configuring 5, and provide the letter that a preservation completes
Number write_done, when
User by cpu i/f inquire this signal put 1 when, i.e. can read receive RAM data enter
Row is analyzed.
Memory modules 102, uses 1 or multiple false dual port RAM realization, it is not necessary to outside storage core
Sheet, its degree of depth can design according to the actual requirements, such as, to preserve the data of 1024 × 32bit,
Then need to design address width be 10, data width be the false dual port RAM of 32.
The present embodiment passes through such scheme, achieves the progress at digital module design aspect, reaches
The flexible and changeable effect meeting customization, saves time and the one-tenth of optical fiber detector exploitation
This, improve the flexibility ratio of optical fiber detector, accuracy；And this modular set
Meter method, it is easier to develop and safeguard.It addition, this device can use fpga logic chip to design
, it is possible to faster realize the various functions of optical fiber detector.
As in figure 2 it is shown, present pre-ferred embodiments proposes a kind of optical fiber and digital OTDR detection method, foundation
The device of above-described embodiment and implement, the method includes:
Step S201, receives the parallel data sent from outside light-receiving and A/D modular converter and delays
Deposit, control parameter according to the reception of configuration, described parallel data is sampled, and will sampling
Data preserve to memory modules；
Step S202, controls parameter according to the transmission of described configuration, obtains configuration number from configuration module
Select according to carrying out parallel-serial conversion, odd even control and path, to send sequence transmission to outside light
Sending module.
Wherein, receive control parameter at least to include: receive the RAM degree of depth, reception postpones point and warm reset is joined
Confidence ceases；Described send control parameter at least include: send starting point, send sequence content,
Send sequence length, send sequence rate, inside and outside path and send odd even configuration information.
Specifically, the optical fiber and digital OTDR detection device that the present embodiment method is used can be with numeral mould
The design of block is added on the main control chip of optical-fiber network, and the present embodiment is with Hardware description language
This digital module is designed by speech, specifically can be designed with Verilog HDL language, should
Digital module can be divided into several little module flexibly, including sending module, receiver module, configuration mould
Block and memory modules.
Each little module specific design method and function are as follows:
Configuration module provides user's access interface and internal configuration registers, the such as CPU shown in Fig. 1 to connect
Mouth die block, it is also possible to change other interfaces into, to facilitate user to carry out the configuration of some parameters.
Wherein cpu i/f module provides the interface communicated with external chip, and usually cpu bus connects
Mouthful.By this module, user can configure the depositor that some are internal, and transmission as shown in Figure 1 rises
Initial point configuration 0, transmission sequence content 1, transmission sequence length configuration 2, transmission sequence rate configuration
3, inside and outside via configuration 4, reception RAM degree of depth configuration 5, reception postpone some configuration 6, a warm reset
Configuration 7 and transmission odd even configuration 8.
Sending module comprises sending module 0, sending module 1, sending module 2, and each module is by configuring mould
Parameter inside block independently controls, such as control optical signal send length, content, speed,
Starting point etc.；Sending module 0 upstate machine realizes, and parallel-serial conversion part can use shift LD
Device realizes；Sending module 1 selects 1 selector to realize with 12；Sending module 2 selects 1 selection with 12
Device realize, user by configure inside and outside via configuration 4 can select use external hardware path or
Person's internal loopback path.
Receiver module can be divided into receiver module 0, receiver module 1, receiver module 2, each module be also by
State modulator inside configuration module, such as, control the sampling length of the optical signal that sampling is received
, sampling time point etc..
Wherein, receiver module 0 realizes with 1 buffer, the reception parallel data 0 shown in Fig. 1 and reception
The clock frequency numerical value of parallel data 1 should equally, and phase place can be different；Receiver module 1 can use
1 enumerator realizes, and starts counting up, reach in count value when sending module 0 starts and sends when
Sampling window is opened, it is allowed to sampled data is saved in the when of receiving the numerical value postponing some configuration 6
Receive inside RAM；Receiver module 2 can use 1 comparator to realize, when writing address ram less than connecing
Receive and continue to preserve data toward RAM when that the RAM degree of depth configuring 5；When writing address ram equal to receiving RA
The M degree of depth stops preserving data when of configuring 5, and provides the signal write_ that a preservation completes
Done, when user by cpu i/f inquire this signal put 1 when, i.e. can read reception RA
The data of M are analyzed.
Memory modules, uses 1 or multiple false dual port RAM realization, it is not necessary to outside storage chip
, its degree of depth can design according to the actual requirements, such as, to preserve the data of 1024 × 32bit, then
Need to design address width be 10, data width be the false dual port RAM of 32.
Embodiment of the present invention optical fiber and digital OTDR detection method and device, in the way of digital module,
The function of OTDR can be realized, it is not necessary to outside traditional fiber detection on the main control chip of optical-fiber network
Device, the most easy and simple to handle, and meet the construction demand of day by day fast-developing optical-fiber network
；Compared to existing technology, achieve the progress at digital module design aspect, reached the most
Become full the effect of foot customization, save time and the cost of optical fiber detector exploitation, carry
The high flexibility ratio of optical fiber detector,
Accuracy.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention
, every equivalent structure utilizing description of the invention and accompanying drawing content to be made or flow process conversion, or
Directly or indirectly it is used in other relevant technical field, is the most in like manner included in the patent of the present invention
In protection domain.
Claims (10)
1. optical fiber and digital OTDR detects a device, is arranged on light net main control chip, it is characterised in that
Including: receiver module, sending module, configuration module and memory modules, wherein:
Described configuration module controls parameter, for described sending module for receiving for the configuration of described receiver module
Configuration sends and controls parameter；
Described receiver module is for receiving send and line number from outside light-receiving and A/D modular converter
According to and cache, control parameter according to described reception, described parallel data sampled, and by hits
According to preserving to described memory modules；
Described sending module, for controlling parameter according to described transmission, obtains configuration data from configuration module
Carry out parallel-serial conversion, odd even controls and path selects, to send sequence transmission to outside optical transmission module；
Wherein, described receive control parameter at least include: receive the RAM degree of depth, receive postpone point and soft multiple
Position configuration information；The described control parameter that sends at least includes: sends starting point, transmission sequence content, send out
Send sequence length, send sequence rate, inside and outside path and send odd even configuration information.
Device the most according to claim 1, it is characterised in that described sending module is additionally operable to basis
Path is returned in the inside of described transmission selection of control parameter, sends described transmission sequence to described reception mould
Block.
Device the most according to claim 1, it is characterised in that described configuration module is provided with user and visits
Ask that interface, described configuration module are additionally operable to receive user's input information by described user's access interface and carry out
Parameter configuration.
Device the most according to claim 1, it is characterised in that described receiver module is additionally operable in institute
State when sending module starts transmission and start counting up, beat when count value reaches and receives the numerical value postponing some configuration
Open sampling window and carry out data sampling.
Device the most according to claim 1, it is characterised in that described receiver module is additionally operable to when writing
During the numerical value that address ram configures less than the reception RAM degree of depth, preserve to the reception RAM of memory modules
Data；Stop preserving data when writing address ram equal to the numerical value receiving the configuration of the RAM degree of depth, and defeated
Go out the signal preserved to inquire about for user.
6. an optical fiber and digital OTDR detection method, it is characterised in that including:
Receive the parallel data sent from outside light-receiving and A/D modular converter and cache, according to joining
The reception put controls parameter, samples described parallel data, and preserves sampled data to internal memory mould
Block；
According to configuration transmission control parameter, from configuration module obtain configuration parameter carry out parallel-serial conversion,
Odd even controls and path selects, to send sequence transmission to outside optical transmission module；
The described control parameter that receives at least includes: receive the RAM degree of depth, reception postpones point and warm reset configures
Information；The described control parameter that sends at least includes: sends starting point, send sequence content, transmission sequence
Length, transmission sequence rate, inside and outside path and transmission odd even configuration information.
Method the most according to claim 6, it is characterised in that also include:
Path is returned in inside according to described transmission selection of control parameter, sends described transmission sequence to connecing
Receive module.
Method the most according to claim 6, it is characterised in that described reception connects from outside light
Receive and also include before parallel data that A/D modular converter sends the step that caches:
Receive user's input information by user's access interface and carry out parameter configuration.
Method the most according to claim 8, it is characterised in that described parallel data is sampled
Step include: start send data time start counting up, count value reach receive postpone some configuration
Open sampling window during numerical value and carry out data sampling.
Method the most according to claim 8, it is characterised in that described by sampled data preserve extremely
The step of memory modules includes:
When writing address ram less than the numerical value receiving the configuration of the RAM degree of depth, to the reception of memory modules
RAM preserves data；Stop preserving when writing address ram equal to the numerical value receiving the configuration of the RAM degree of depth
Data, and export the signal preserved for user's inquiry.
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| CN201210531731.XA CN103873141B (en) | 2012-12-11 | 2012-12-11 | Optical fiber and digital OTDR detection method and device |
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| CN201210531731.XA CN103873141B (en) | 2012-12-11 | 2012-12-11 | Optical fiber and digital OTDR detection method and device |
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| CN103873141B true CN103873141B (en) | 2016-12-07 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158280A (en) * | 2011-04-02 | 2011-08-17 | 王健 | Method for modulating and superposing optical time domain reflectometer (OTDR) testing signals in data transmission optical signals and OTDR testing method |
| CN202077027U (en) * | 2011-04-02 | 2011-12-14 | 王健 | Optical transmission module with OTDR (optical time domain reflectometer) function and optical communication equipment with OTDR function |
| CN102761375A (en) * | 2012-07-10 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical terminal used in Gigabit passive optical network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7369219B2 (en) * | 2005-04-21 | 2008-05-06 | Fundacao Cpqd-Centro De Pesquisa E Desenvolvimento Em Telecominicacoes | Active wavelength converter for use with an optical time-domain reflectometer (OTDR) and method for increasing OTDR supervision distance range |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158280A (en) * | 2011-04-02 | 2011-08-17 | 王健 | Method for modulating and superposing optical time domain reflectometer (OTDR) testing signals in data transmission optical signals and OTDR testing method |
| CN202077027U (en) * | 2011-04-02 | 2011-12-14 | 王健 | Optical transmission module with OTDR (optical time domain reflectometer) function and optical communication equipment with OTDR function |
| CN102761375A (en) * | 2012-07-10 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical terminal used in Gigabit passive optical network |
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Effective date of registration: 20221205 Address after: 518055 Zhongxing Industrial Park, Liuxian Avenue, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SANECHIPS TECHNOLOGY Co.,Ltd. Address before: 518057 Ministry of justice, Zhongxing building, South Science and technology road, Nanshan District hi tech Industrial Park, Shenzhen, Guangdong Patentee before: ZTE Corp. Patentee before: SANECHIPS TECHNOLOGY Co.,Ltd. |