CN101908928B - Automatic monitoring and fault positioning system of single-fiber three-way multiplexer - Google Patents
Automatic monitoring and fault positioning system of single-fiber three-way multiplexer Download PDFInfo
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Abstract
The invention relates to an automatic monitoring and fault positioning system of a single-fiber three-way multiplexer, which comprises a first sampling circuit, a second sampling circuit, a third sampling circuit and a fourth sampling circuit, wherein the first sampling circuit is used for sampling an optical signal at the front end of the detected single-fiber three-way multiplexer, and the second sampling circuit, the third sampling circuit and the fourth sampling circuit are respectively used for sampling signals with the wavelengths of 1550nm, 1490nm and 1310nm at the rear end of the detected single-fiber three-way multiplexer; the first to the fourth sampling circuits are connected with a central controller, and the central controller is used for reading the numerical value of each sampling circuit and finishing the judging and positioning working of faults. The fault of the single-fiber three-way multiplexer can be detected in real time.
Description
Technical field
The invention belongs to Optical Access Network network field, be particularly useful for the single-fiber three-way multiplexer in Fiber to the home (FTTH) technical field is monitored occasion with fault location automatically.
Background technology
In recent years, along with developing rapidly of broadband access network, the broadband notable feature that becomes Access Network development.Video request program, IPTV(Web TV) and the contour band width service of online game be considered as new business growth point by telecom operators and radio and TV operator gradually, therefore the user constantly increases the demand of access bandwidth, take existing ADSL(ADSL (Asymmetric Digital Subscriber Line)) be difficult to satisfy the user to the requirement of the aspects such as high bandwidth, two-way transmission capabilities and fail safe as main broadband access method.In the face of this predicament, the sight of paying close attention to has been invested that Fiber to the home by Enforcement of Telecommunication operator---FTTH(Fiber To The Home) and technology.FTTH can satisfy the integrated services such as data, voice, CATV to the demand of high bandwidth, strengthened the transparency support of network to data form, speed, wavelength and agreement, relax simultaneously system to requirements such as environmental condition and power supplies, thereby reduced the cost of installation and working service.The practical application link of FTTH relates to a very important core devices, i.e. single-fiber three-way multiplexer-Triplexer-PLC(PLC, Planar Light wave Circuit), its major function is to the coupling of light signal and wavelength division multiplexing.EPON and GPON technical specification (ITU-TG.983 and G.984) have stipulated to adopt in the single-fiber three-way multiplexer 1310nm, 1490nm, 1550nm three-wavelength allocative decision: 1310nm to be specifically designed to uploading of data and IP vision signal; 1490nm is used for the down biography of voice, data and IP vision signal; 1550nm is used for passing under the analog video signal.
Because single-fiber three-way multiplexer is in user side work, and user side generally has the applied environment complexity, therefore the unfavorable factors such as burst accident occurrence frequency height are very necessary for the malfunction monitoring of single-fiber three-way multiplexer and the design and development work of fault location system.Yet, all do not have report in present patent and all kinds of document about the fault detect (especially automatically monitoring) of single-fiber three-way multiplexer and the content of fault location.Therefore, the safety and stability that the automatic monitoring of this patent invention and fault location system not only can improve single-fiber three-way multiplexer, and compare with traditional artificial fault detection method, can reduce again operating cost and the management difficulty of system.
Summary of the invention
The deficiency that does not have corresponding Fault Detection And Location System or equipment in order to solve the single-fiber three-way multiplexer of current application in the FTTH field, remedy the technological gap that is directed to single-fiber three-way multiplexer device security and stable field, the present invention proposes automatic monitoring and the fault location system of single-fiber three-way multiplexer.
Single-fiber three-way multiplexer of the present invention is monitoring and fault location system automatically, comprises for the first sample circuit of the sampling of tested single-fiber three-way multiplexer front end being carried out light signal and the second sample circuit, the 3rd sample circuit, the 4th sample circuit of respectively the wavelength signals of 1550nm, the 1490nm of the rear end of tested single-fiber three-way multiplexer, 1310nm being sampled; Described first to fourth sample circuit connects a central controller, and described central controller reads the digital value of each sample circuit, and finishes the determination and positioning work of fault.
Described sample circuit comprises light splitting and photoelectric conversion section and signal condition part, and described light splitting and photoelectric conversion section are by beam splitter, photoelectric conversion module, and optical interface and wire jumper form, and described beam splitter splitting ratio is: 95:5 or 90:10; Described signal condition part mainly is comprised of power amplifier, A/D converter.
Described central controller comprises main control chip, and the power module that is connected with described main control chip, crystal oscillator module, LCD module, FLASH module, E2PROM module and buzzer module; Described main control chip comprises sampled signal read module and fault judge module, according to predefined different periods and different sampling intervals, read simultaneously respectively the digital value of two sample circuits, and relatively whether these two digital values is identical; If comparative result is different, will judge that so fault occurs, and definite fault type and carry out fault location, simultaneously, carrying out buzzer warning, waiting system resets; If comparative result is identical, return information is proceeded timing sampling so; But if continuous 10 times sampled value is all identical, and sampled value originally has light as full 1(representative) or full 0 (representing unglazed), judge that so equally fault occurs, and definite fault type and carry out fault location, simultaneously, carry out buzzer warning, waiting system resets.
The present invention mainly comprises three parts: 1) light splitting and photoelectric conversion section; 2) signal condition part; 3) control section.The connection of three parts is as follows.In light splitting and photoelectric conversion section, respectively the wavelength signals of 1310nm, 1490nm and 1550nm is sampled by beam splitter (splitting ratio is: 95:5 or 90:10), and then by optical-electrical converter the sampled light signal is converted to signal of telecommunication input signal conditioning part.In the signal condition part, the signal of telecommunication at first amplifies ultra-weak electronic signal with filtering through specific power amplifier to be processed, and the signal after then will nursing one's health is input in the A/D conversion chip.After the A/D conversion, the signal of telecommunication is digital signal by analog signal conversion, and is input to control section.At last, in control section, main control chip will read the digital value of each sampled point, and finish the determination and positioning work of fault.
Described light splitting and photoelectric conversion section are mainly by beam splitter, photoelectric conversion module, and necessary optical interface and wire jumper form.Described beam splitter has the splitting ratio of 95:5 or 90:10 and lower insertion loss.Described photoelectric conversion module generally has higher photoelectric conversion efficiency and lower noise.The major function of described light splitting and photoelectric conversion section is to carry out the sampling of light signal and the generation of the signal of telecommunication.
Described signal condition part mainly is comprised of power amplifier, A/D conversion chip and filter (if necessary).Described power amplifier is responsible for the faint signal of telecommunication is amplified to the input range that the A/D conversion chip allows, and General Requirements has larger amplification bandwidth and gain ranging.Described A/D conversion chip is used for the signal of telecommunication of simulation is converted to the signal of telecommunication of numeral, and General Requirements has higher conversion accuracy (figure place).Described filter is used for carrying out signal filtering, to reduce noise to the impact of the signal of telecommunication.
Described central controller is the hardware system that is made of the LM3S1138 microcontroller that has adopted ARM Cortex-M3 kernel, as shown in Figure 1.The LM3S1138 microcontroller has 32 bit arithmetic abilities, has used the Thumb2 instruction set of compatible ARM Thumb to reduce the demand of memory capacity, and has reached the purpose that reduces cost with this.Simultaneously, all other products of LM3S1138 microcontroller and Stellaris series are code compatibilities, can adapt to various accurate demands.In addition, it is little that the LM3S1138 microcontroller also has an encapsulation volume, is convenient to the advantages such as integrated, low in energy consumption.Control section also has power module, crystal oscillator module, LCD module, FLASH module, E2PROM module and buzzer module except being equipped with the LM3S1138 microcontroller.Described power module partly provides stable power supply for control section, photoelectric conversion section and signal condition, and the Switching Power Supply that can provide plurality of level and electric current to select is provided.Described crystal oscillator module provides stable clock for control section.Described LCD module provides necessary output display for control section.Described FLASH module and E2PROM module provide the information storage of sufficient space for control section.Described buzzer module provides necessary warning output for control section.
The fault of described single-fiber three-way multiplexer may be three kinds of situations, that is: the single-fiber three-way multiplexer front end breaks down, and itself breaks down single-fiber three-way multiplexer, and break down in the single-fiber three-way multiplexer rear end, as shown in Figure 2.Further, described single-fiber three-way multiplexer front end fault may be that optical fiber damages or optical sender goes wrong; The fault of single-fiber three-way multiplexer own may be device aging or other burst accidents; Single-fiber three-way multiplexer rear end fault comprises at least one line failure in speech business, data service, professional three circuits of simulation CATV.Accordingly, the automatic monitoring that provides of the present invention and fault location system pattern in actual applications are as shown in Figure 3.At the single-fiber three-way multiplexer front end, beam splitter A and optical-electrical converter A are responsible for gathering the multiplexed signals of fore-end.And beam splitter B and optical-electrical converter B, beam splitter C and optical-electrical converter C, beam splitter D and optical-electrical converter D be responsible for to gather respectively the rear end part wavelength be the light signal of 1550nm, 1490nm, 1310nm.
The core concept of the Software for Design that control section adopts after reading sampled signal as shown in Figure 4, that is: according to predefined different periods and different sampling intervals, read simultaneously respectively the digital value of the A/D converter of two ports of single-fiber three-way multiplexer, and relatively whether these two digital values are identical.If comparative result is different, will judge that so fault occurs, and definite fault type and carry out fault location.Simultaneously, carry out buzzer warning, waiting system resets.If comparative result is identical, return information is proceeded timing sampling so.But, if continuous 10 times sampled value is all identical, and sampled value this as full 1(representative light is arranged) or full 0 (represent unglazed), judge that so equally fault occurs, and definite fault type with carry out fault location.Simultaneously, carry out buzzer warning, waiting system resets.
The present invention not only can detect the running status of single-fiber three-way multiplexer in real time, but also can locate exactly out of order occurrence scope and concrete fault type.Therefore, this system not only can improve the fail safe of single-fiber three-way multiplexer, effectively reduce the loss that all kinds of faults are brought to the user, and be convenient to Virtual network operator and network manager and in time find and get rid of relevant fault, be convenient to the operation of whole FTTH system.
Advantage of the present invention is:
1) according to the variation of time period, detects in real time the fault of single-fiber three-way multiplexer;
2) can accurately locate the scope that fault occurs, determine fault type;
3) the fault detect success rate of system is high, and by LCD and buzzer alarm;
4) system has characteristics portable, low-power consumption.
Description of drawings
Fig. 1 is the hardware structure diagram of single-fiber three-way multiplexer automatic monitoring system of the present invention.
Fig. 2 is three kinds of possible fault coverages during single-fiber three-way multiplexer of the present invention is used.
Fig. 3 is the application model example of single-fiber three-way multiplexer automatic monitoring system of the present invention.
Fig. 4 is the software flow pattern of single-fiber three-way multiplexer automatic monitoring system of the present invention.
Fig. 5 is that single-fiber three-way multiplexer automatic monitoring system of the present invention is in the application that detects under the multiplexer front end fault scenario.
Fig. 6 is that single-fiber three-way multiplexer automatic monitoring system of the present invention is in the application that detects under the multiplexer fault scenario.
Fig. 7 is that single-fiber three-way multiplexer automatic monitoring system of the present invention is detecting one of application under the fault scenario of multiplexer rear end.
Fig. 8 is two of the application of single-fiber three-way multiplexer automatic monitoring system of the present invention under the fault scenario of detection multiplexer rear end.
Fig. 9 is three of the application of single-fiber three-way multiplexer automatic monitoring system of the present invention under the fault scenario of detection multiplexer rear end.
Embodiment
With reference to the accompanying drawings, the present invention is described further:
With reference to accompanying drawing:
As shown in Figure 1, single-fiber three-way multiplexer of the present invention is monitoring and fault location system automatically, comprises for the first sample circuit of the sampling of tested single-fiber three-way multiplexer front end being carried out light signal and the second sample circuit, the 3rd sample circuit, the 4th sample circuit of respectively the wavelength signals of 1550nm, the 1490nm of the rear end of tested single-fiber three-way multiplexer, 1310nm being sampled; Described first to fourth sample circuit connects a central controller, and described central controller reads the digital value of each sample circuit, and finishes the determination and positioning work of fault.
Described sample circuit comprises light splitting and photoelectric conversion section and signal condition part, and described light splitting and photoelectric conversion section are by beam splitter, photoelectric conversion module, and optical interface and wire jumper form, and described beam splitter splitting ratio is: 95:5 or 90:10; Described signal condition part mainly is comprised of power amplifier, A/D converter.
Described central controller comprises main control chip, and the power module that is connected with described main control chip, crystal oscillator module, LCD module, FLASH module, E2PROM module and buzzer module; Described main control chip comprises sampled signal read module and fault judge module, according to predefined different periods and different sampling intervals, read simultaneously respectively the digital value of two sample circuits, and relatively whether these two digital values is identical; If comparative result is different, will judge that so fault occurs, and definite fault type and carry out fault location, simultaneously, carrying out buzzer warning, waiting system resets; If comparative result is identical, return information is proceeded timing sampling so; But if continuous 10 times sampled value is all identical, and sampled value originally has light as full 1(representative) or full 0 (representing unglazed), judge that so equally fault occurs, and definite fault type and carry out fault location, simultaneously, carry out buzzer warning, waiting system resets.
The present invention mainly comprises three parts: 1) light splitting and photoelectric conversion section; 2) signal condition part; 3) control section.The connection of three parts is shown in Fig. 1,3.In light splitting and photoelectric conversion section, respectively the wavelength signals of 1310nm, 1490nm and 1550nm is sampled by beam splitter (splitting ratio is: 95:5 or 90:10), and then by optical-electrical converter the sampled light signal is converted to signal of telecommunication input signal conditioning part.In the signal condition part, the signal of telecommunication at first amplifies ultra-weak electronic signal with filtering through specific power amplifier to be processed, and the signal after then will nursing one's health is input in the A/D conversion chip.After the A/D conversion, the signal of telecommunication is digital signal by analog signal conversion, and is input to control section.At last, in control section, main control chip will read the digital value of each sampled point, and finish the determination and positioning work of fault.
Described light splitting and photoelectric conversion section are mainly by beam splitter, photoelectric conversion module, and necessary optical interface and wire jumper form.Described beam splitter has the splitting ratio of 95:5 or 90:10 and lower insertion loss.Described photoelectric conversion module generally has higher photoelectric conversion efficiency and lower noise.The major function of described light splitting and photoelectric conversion section is to carry out the sampling of light signal and the generation of the signal of telecommunication.
Described signal condition part mainly is comprised of power amplifier, A/D conversion chip and filter (if necessary).Described power amplifier is responsible for the faint signal of telecommunication is amplified to the input range that the A/D conversion chip allows, and General Requirements has larger amplification bandwidth and gain ranging.Described A/D conversion chip is used for the signal of telecommunication of simulation is converted to the signal of telecommunication of numeral, and General Requirements has higher conversion accuracy (figure place).Described filter is used for carrying out signal filtering, to reduce noise to the impact of the signal of telecommunication.
Described central controller is the hardware system that is made of the LM3S1138 microcontroller that has adopted ARM Cortex-M3 kernel, as shown in Figure 1.The LM3S1138 microcontroller has 32 bit arithmetic abilities, has used the Thumb2 instruction set of compatible ARM Thumb to reduce the demand of memory capacity, and has reached the purpose that reduces cost with this.Simultaneously, all other products of LM3S1138 microcontroller and Stellaris series are code compatibilities, can adapt to various accurate demands.In addition, it is little that the LM3S1138 microcontroller also has an encapsulation volume, is convenient to the advantages such as integrated, low in energy consumption.Control section also has power module, crystal oscillator module, LCD module, FLASH module, E2PROM module and buzzer module except being equipped with the LM3S1138 microcontroller.Described power module partly provides stable power supply for control section, photoelectric conversion section and signal condition, and the Switching Power Supply that can provide plurality of level and electric current to select is provided.Described crystal oscillator module provides stable clock for control section.Described LCD module provides necessary output display for control section.Described FLASH module and E2PROM module provide the information storage of sufficient space for control section.Described buzzer module provides necessary warning output for control section.
The fault of described single-fiber three-way multiplexer may be three kinds of situations, that is: the single-fiber three-way multiplexer front end breaks down, and itself breaks down single-fiber three-way multiplexer, and break down in the single-fiber three-way multiplexer rear end, as shown in Figure 2.Further, described single-fiber three-way multiplexer front end fault may be that optical fiber damages or optical sender goes wrong; The fault of single-fiber three-way multiplexer own may be device aging or other burst accidents; Single-fiber three-way multiplexer rear end fault comprises at least one line failure in speech business, data service, professional three circuits of simulation CATV.Accordingly, the automatic monitoring that provides of the present invention and fault location system pattern in actual applications are as shown in Figure 3.At the single-fiber three-way multiplexer front end, beam splitter A and optical-electrical converter A are responsible for gathering the multiplexed signals of fore-end.And beam splitter B and optical-electrical converter B, beam splitter C and optical-electrical converter C, beam splitter D and optical-electrical converter D be responsible for to gather respectively the rear end part wavelength be the light signal of 1550nm, 1490nm, 1310nm.
The core concept of the Software for Design that control section adopts after reading sampled signal as shown in Figure 4, that is: according to predefined different periods and different sampling intervals, read simultaneously respectively the digital value of the A/D converter of two ports of single-fiber three-way multiplexer, and relatively whether these two digital values are identical.If comparative result is different, will judge that so fault occurs, and definite fault type and carry out fault location.Simultaneously, carry out buzzer warning, waiting system resets.If comparative result is identical, return information is proceeded timing sampling so.But, if continuous 10 times sampled value is all identical, and sampled value this as full 1(representative light is arranged) or full 0 (represent unglazed), judge that so equally fault occurs, and definite fault type with carry out fault location.Simultaneously, carry out buzzer warning, waiting system resets.
As shown in Figure 5, when the fore-end of single-fiber three-way multiplexer went wrong, when namely not having light signal input single-fiber three-way multiplexer, monitoring and fault location system can be judged fault automatically.Within certain detection period and sampling interval, system is by the beam splitter A1 of the first sample circuit and the signal of optical-electrical converter A2 collection fore-end, and after the signal condition part, the sampled value that control section obtains is full 0; Meanwhile, the beam splitter D1 of the beam splitter C1 of the beam splitter B1 of the second sample circuit and optical-electrical converter B2, the 3rd sample circuit and optical-electrical converter C2, the 4th sample circuit and optical-electrical converter D2 are that the light signal of 1550nm, 1490nm, 1310nm is sampled to the rear end part wavelength respectively, after signal condition part separately, the sampled value that control section obtains is full 0.In this detected the period, monitoring and the continuous 10 times front-end and back-end sampled value of fault location system all were full 0s automatically.In this case, system judges that the fore-end of single-fiber three-way multiplexer breaks down, and by LCD output fault type, sends alarm signal by buzzer.
As shown in Figure 6, when the module chip of single-fiber three-way multiplexer or port went wrong, monitoring and fault location system can be judged fault automatically.Within certain detection period and sampling interval, system is by the beam splitter A1 of the first sample circuit and the signal of optical-electrical converter A2 collection fore-end, and after the signal condition part, the sampled value that control section obtains is full 0 or complete 1; Meanwhile, the beam splitter D1 of the beam splitter C1 of the beam splitter B1 of the second sample circuit and optical-electrical converter B2, the 3rd sample circuit and optical-electrical converter C2, the 4th sample circuit and optical-electrical converter D2 are that the light signal of 1550nm, 1490nm, 1310nm is sampled to the rear end part wavelength respectively, after signal condition part separately, the sampled value that control section obtains the third and fourth sample circuit is full 0, and the sampled value of the second sample circuit is complete 1 or full 0.In this case, system judges that module chip or the port section of single-fiber three-way multiplexer break down, and by LCD output fault type, sends alarm signal by buzzer.
As shown in Figure 7, when 1310 nm channels of single-fiber three-way multiplexer rear end went wrong, monitoring and fault location system can be judged fault automatically.Within certain detection period and sampling interval, system is by the beam splitter A1 of the first sample circuit and the signal of optical-electrical converter A2 collection fore-end, and after the signal condition part, the sampled value that control section obtains is full 0 or complete 1; Meanwhile, the beam splitter D1 of the beam splitter C1 of the beam splitter B1 of the second sample circuit and optical-electrical converter B2, the 3rd sample circuit and optical-electrical converter C2, the 4th sample circuit and optical-electrical converter D2 are that the light signal of 1550nm, 1490nm, 1310nm is sampled to the rear end part wavelength respectively, after signal condition part separately, the sampled value that control section obtains the second and the 3rd sample circuit is full 0 or complete 1, and the sampled value of the 4th sample circuit is full 0.In this case, system judges that 1310 nm channel strips of single-fiber three-way multiplexer rear end break down, and by LCD output fault type, sends alarm signal by buzzer.
As shown in Figure 8, when 1490 nm channels of single-fiber three-way multiplexer rear end went wrong, monitoring and fault location system can be judged fault automatically.Within certain detection period and sampling interval, system is by the beam splitter A1 of the first sample circuit and the signal of optical-electrical converter A2 collection fore-end, and after the signal condition part, the sampled value that control section obtains is full 0 or complete 1; Meanwhile, the beam splitter D1 of the beam splitter C1 of the beam splitter B1 of the second sample circuit and optical-electrical converter B2, the 3rd sample circuit and optical-electrical converter C2, the 4th sample circuit and optical-electrical converter D2 are that the light signal of 1550nm, 1490nm, 1310nm is sampled to the rear end part wavelength respectively, after signal condition part separately, the sampled value that control section obtains the second, the 4th sample circuit is full 0 or complete 1, and the sampled value of the 3rd sample circuit is full 0.In this case, system judges that the 1490nm channel strip of single-fiber three-way multiplexer rear end breaks down, and by LCD output fault type, sends alarm signal by buzzer.
As shown in Figure 9, when 1550 nm channels of single-fiber three-way multiplexer rear end went wrong, monitoring and fault location system can be judged fault automatically.Within certain detection period and sampling interval, system is by the beam splitter A1 of the first sample circuit and the signal of optical-electrical converter A2 collection fore-end, and after the signal condition part, the sampled value that control section obtains is full 0 or complete 1; Meanwhile, the beam splitter D1 of the beam splitter C1 of the beam splitter B1 of the second sample circuit and optical-electrical converter B2, the 3rd sample circuit and optical-electrical converter C2, the 4th sample circuit and optical-electrical converter D2 are that the light signal of 1550nm, 1490nm, 1310nm is sampled to the rear end part wavelength respectively, after signal condition part separately, the sampled value that control section obtains the 3rd, the 4th sample circuit is full 0 or complete 1, and the sampled value of the second sample circuit is full 0.In this case, system judges that 1550 nm channel strips of single-fiber three-way multiplexer rear end break down, and by LCD output fault type, sends alarm signal by buzzer.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reaches in those skilled in the art conceives the equivalent technologies means that can expect according to the present invention.
Claims (2)
1. automatically monitoring and fault location system of single-fiber three-way multiplexer is characterized in that: comprise for the first sample circuit that the wavelength multiplexed signal of tested single-fiber three-way multiplexer front end is sampled and the second sample circuit, the 3rd sample circuit, the 4th sample circuit of respectively the wavelength signals of 1550nm, the 1490nm of the rear end of tested single-fiber three-way multiplexer, 1310nm being sampled; Described first to fourth sample circuit connects a central controller, and described central controller reads the digital value of each sample circuit, and finishes the determination and positioning work of fault;
Described first to fourth sample circuit comprises light splitting and photoelectric conversion section and signal condition part, described light splitting and photoelectric conversion section are comprised of beam splitter, photoelectric conversion module, optical interface and wire jumper, and described beam splitter splitting ratio is: 95:5 or 90:10; Single-fiber three-way multiplexer automatically monitoring is sampled to wavelength multiplexed signal and 1550nm, the 1490nm of single-fiber three-way multiplexer rear end, the wavelength signals of 1310nm of single-fiber three-way multiplexer front end respectively by beam splitter with fault location system, and then by photoelectric conversion module the sampled light signal is converted to signal of telecommunication input signal conditioning part; Described signal condition partly comprises power amplifier, A/D converter, the signal of telecommunication at first amplifies ultra-weak electronic signal with filtering through power amplifier to be processed, then the signal after will nursing one's health is input in the A/D converter, after the A/D conversion, the signal of telecommunication is digital signal by analog signal conversion, and is input to described central controller;
Described central controller comprises main control chip, and the power module that is connected with described main control chip, crystal oscillator module, LCD module, FLASH module, E2PROM module and buzzer module; Described main control chip comprises sampled signal read module and fault judge module, according to predefined different periods and different sampling intervals, read simultaneously respectively the digital value of two sample circuits, and relatively whether these two digital values is identical; If comparative result is different, will judge that so fault occurs, and definite fault type and carry out fault location, simultaneously, carrying out buzzer warning, waiting system resets; If comparative result is identical, return information is proceeded timing sampling so; But, if continuous 10 times sampled value is all identical, and sampled value this as complete 1 or full 0, complete 1 representative has light, full 0 representative is unglazed, judges that so equally fault occurs, and definite fault type and carry out fault location, simultaneously, carry out buzzer warning, waiting system resets.
2. single-fiber three-way multiplexer as claimed in claim 1 is monitored and fault location system automatically, it is characterized in that: described main control chip adopts the LM3S1138 microcontroller.
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| CN102420654A (en) * | 2011-12-02 | 2012-04-18 | 浙江工业大学 | Fault monitoring unit of novel photoelectric integrated single-fiber three-way multiplexer |
| CN106341183A (en) * | 2016-11-11 | 2017-01-18 | 济南浪潮高新科技投资发展有限公司 | Method for monitoring optical module by netmanager software |
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| JP2005033802A (en) * | 2003-07-07 | 2005-02-03 | Samsung Electronics Co Ltd | Self-recovering wavelength division multiplexing,passive optical subscriber network |
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| CN201243288Y (en) * | 2008-08-04 | 2009-05-20 | 青岛海信宽带多媒体技术股份有限公司 | Monitoring module and optical module with the same |
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| JP2003046457A (en) * | 2001-07-31 | 2003-02-14 | Furukawa Electric Co Ltd:The | Optical communication method and its system |
| US7181137B1 (en) * | 2002-09-30 | 2007-02-20 | Cisco Technology, Inc. | Subband spectrum analysis for optical multiplex section protection |
| JP2005033802A (en) * | 2003-07-07 | 2005-02-03 | Samsung Electronics Co Ltd | Self-recovering wavelength division multiplexing,passive optical subscriber network |
| CN201243288Y (en) * | 2008-08-04 | 2009-05-20 | 青岛海信宽带多媒体技术股份有限公司 | Monitoring module and optical module with the same |
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| CN101908928A (en) | 2010-12-08 |
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