CN109819641A - Passive optical network multi-user unit radiation-emitting positions amelioration method - Google Patents
Passive optical network multi-user unit radiation-emitting positions amelioration method Download PDFInfo
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- CN109819641A CN109819641A CN201910288907.5A CN201910288907A CN109819641A CN 109819641 A CN109819641 A CN 109819641A CN 201910288907 A CN201910288907 A CN 201910288907A CN 109819641 A CN109819641 A CN 109819641A
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- radiation
- optical network
- passive optical
- user unit
- network multi
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0098—Shielding materials for shielding electrical cables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The present invention relates to telecommunications fields, and in particular to a kind of passive optical network multi-user unit radiation-emitting positioning amelioration method, comprising the following steps: diagnose source and the propagation path of interference；The overlap joint of safety ground in advance is carried out to EMC；Unwanted frequency component is removed from frequency domain by filtering, reduces electromagnetic disturbance at two aspects of conduction and radiation；Inhibit the various electromagnetic interferences by spatial by shielding；Suspicious element is replaced with the element for meeting EMC requirement；The output energy of crystal oscillator and its harmonic wave is reduced by series resistance or the method for parallel resistance to crystal oscillator product.The present invention starts with from root, reduces radiation energy from source, destroys or change the path of radiation interference, reduce gap, reinforce filtering, radiation mechanism is destroyed in the position for changing line, can fast and accurately carry out the positioning rectification of passive optical network multi-user unit radiation-emitting.
Description
Technical field
The present invention relates to telecommunications fields, and in particular to a kind of passive optical network multi-user unit radiation-emitting positioning is whole
Change method.
Background technique
With the development of communication, light source optical-fiber network PON products application is more and more extensive, and MDU multiple users unit is
Wherein more complicated one kind, meeting electromagnetic compatibility EMC demand is the indispensable precondition that product goes to the world.The radiation of MDU
Emit unqualified an important factor for becoming puzzlement hardware research staff, leading to project development schedule delay and difficulties.
EMC rectification refers to that is taken after product goes wrong in EMC test process makes up gimmick.EMC rectifying and improving
Purpose, the interference that EUT itself is generated is reduced, is met the requirements of the standard, while EUT anti-interference ability itself improves, same full
Foot requires.Rectification is exactly to inhibit potential problems to occur problem no longer with EMC gimmick.
RE radiation-emitting, CE conducted emission are two broad aspects of EMI.In view of this, we test rectification practice in many years
On the basis of summary and induction extract a set of effective amelioration method, can be for hardware research staff in product radiation-emitting
It is referred in RE test rectification.
Summary of the invention
The purpose of the present invention is to provide a kind of passive optical network multi-user unit radiation-emittings to position amelioration method, can
EUT itself interference is fast and accurately reduced, and improves its anti-interference ability.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of passive optical network multi-user unit radiation-emitting positioning amelioration method, comprising the following steps:
Diagnose source and the propagation path of interference；
The overlap joint of safety ground in advance is carried out to EMC；
Unwanted frequency component is removed from frequency domain by filtering, reduces electromagnetism at two aspects of conduction and radiation and disturbs
It disturbs；
Inhibit the various electromagnetic interferences by spatial by shielding；
Suspicious element is replaced with the element for meeting EMC requirement；
The output energy of crystal oscillator and its harmonic wave is reduced by series resistance or the method for parallel resistance to crystal oscillator product.
Further technical solution is that the source of the diagnosis interference and the method for propagation path are first to find maximum
Radiation direction removes the signal wire of periphery, judges that EUT power supply line radiation interference power itself obtains source and propagation path.
Further technical solution is, after the signal wire for removing periphery, if crossing the frequency point of EUT Fail still
Very high, the intensity of each major part component noise jamming relatively finds high point on the probe detection circuit plate of magnetic field, electric field probe or
The component's feet connector of probe detection major part relatively finds high point.
When further technical solution is the source that the diagnosis is interfered and propagation path, to EUT metal shell screw
It is checked whether tightening, whether the ground connection of plug receptacle is well checked.
Further technical solution is, when the signal wire for removing periphery, retains power supply line, to non-removable letter
Number line adds core to judge.
Further technical solution is that judgement EUT itself the power supply line radiation interference power obtains source and propagates
The specific method is as follows in path:
After pulling out all extra cables, if radiation is qualified, eliminate cable common mode current problem, then by all cables with
Equipment connects, and judges whether radiation is qualified, qualified then complete to judge, unqualified, continues to eliminate common mode current solution again；
If after pulling out all extra cables, radiation is still unqualified, then increase magnet ring on the power line, after increasing magnet ring
Radiation is inhibited, then eliminates common mode current using processing filter, qualified after elimination then to complete, if radiated after increasing magnet ring
It is not inhibited or unqualified, then checks cabinet shield effectiveness.
Further technical solution is to eliminate the elimination common mode current method of cable to be, to ferrite magnetic in cable cover
Ring uses or improves shielded cable if cannot filter, circuit filtering is used if it can filter；
If after putting on ferrite bead, having improvement but unqualified, being then further added by magnet ring, and reach using circuit filtering
Until qualification.
Compared with prior art, the beneficial effects of the present invention are: the present invention starts with from root, by radiation energy from source
It reduces, destroys or change the path of radiation interference, reduce gap, reinforce filtering, the position for changing line carries out brokenly radiation mechanism
It is bad, it can fast and accurately carry out the positioning rectification of passive optical network multi-user unit radiation-emitting.
Detailed description of the invention
Fig. 1 is present invention step position view locating in product test test.
Fig. 2 is that the present invention judges that EUT power supply line radiation interference power itself show that the process of source and propagation path is illustrated
Figure.
Fig. 3 is the elimination common mode current method schematic diagram that the present invention eliminates cable.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The production principle of EMI:
What electric and magnetic fields were generated along with voltage and current effect, the variation of voltage and current mainly in the unit time
Rate dI/dt, dv/dt influences, if the more high electric and magnetic fields accordingly generated of dI/dt, dv/dt interfere stronger
The radiation transmission path of EMI (electromagnetic interference): noise is the characteristic with electric wave, and the modes of electric and magnetic fields passes
It broadcasts.
It is EMI source head to be determined and coupling propagation path for EMI test rectification
EMI policy thought
(1) start with from root, reduce radiation energy from source
Such as: clock crystal pin seals in resistance, and resistance etc. is sealed on clock line.
(2) destroy or change the path of radiation interference
Reduce coupling mechanism, usually when trace be interference signal frequency λ/4 when interference it is most strong, can change cabling or
Reinforce filtering.
(3) destruction of radiation mechanism
Gap is reduced, reinforces filtering, changes the position of line.
Therefore The present invention gives following embodiments:
Passive optical network multi-user unit radiation-emitting positions one embodiment of amelioration method: Yi Zhongwu according to the present invention
Source optical-fiber network multi-user unit radiation-emitting positions amelioration method, comprising the following steps: diagnoses source and the propagation path of interference；
The overlap joint of safety ground in advance is carried out to EMC；Unwanted frequency component is removed from frequency domain by filtering, in conduction and radiation two
A aspect reduces electromagnetic disturbance；Inhibit the various electromagnetic interferences by spatial by shielding；With the element for meeting EMC requirement
Replace suspicious element；The output energy of crystal oscillator and its harmonic wave is reduced by series resistance or the method for parallel resistance to crystal oscillator product
Amount.
For a MDU, we carry out EMI radiation interference confirmation according to the test method of standard first, find test
The Frequency point of Fail, then from the judgement of EUT actual features, the influence of equivalent radiated power antenna, the influence in path and the shadow of Source
It rings, the influence then generated further according to various factors takes appropriate measures.
Fig. 2 shows a preferred embodiment of the present invention, the source of the diagnosis interference and the method for propagation path be,
Greatest irradiation direction is first found, the signal wire of periphery is removed, judges that EUT power supply line radiation interference power itself obtains source and passes
Broadcast path.
As the preferred embodiment of above-described embodiment, after the signal wire for removing periphery, if crossing the frequency point of EUT Fail
Still very high, the intensity of each major part component noise jamming relatively finds high point on the probe detection circuit plate of magnetic field, and electric field is visited
Stick or the component's feet connector of probe detection major part relatively find high point, can use spectrum analyzer and electric field magnetic
Field probe.
As the preferred embodiment of above-described embodiment, the source of the diagnosis interference and when propagation path, to EUT metal shell
It is checked whether screw tightening, whether the ground connection of plug receptacle is well checked.
As the preferred embodiment of above-described embodiment, it is described remove periphery signal wire when, retain power supply line, to non-removable
Signal wire add core to judge.
Fig. 2 specifically also shows a specific embodiment of the invention, and judgement EUT itself the power supply line radiation interference is strong
It is weak to show that the specific method is as follows with propagation path in source:
After pulling out all extra cables, if radiation is qualified, eliminate cable common mode current problem, then by all cables with
Equipment connects, and judges whether radiation is qualified, qualified then complete to judge, unqualified, continues to eliminate common mode current solution again；
If after pulling out all extra cables, radiation is still unqualified, then increase magnet ring on the power line, after increasing magnet ring
Radiation is inhibited, then eliminates common mode current using processing filter, qualified after elimination then to complete, if radiated after increasing magnet ring
It is not inhibited or unqualified, then checks cabinet shield effectiveness.
If Fig. 3 is held, the present invention eliminate cable elimination common mode current method be, to ferrite bead in cable cover, such as
Fruit cannot filter, then use or improve shielded cable, circuit filtering is used if it can filter；
If after putting on ferrite bead, having improvement but unqualified, being then further added by magnet ring, and reach using circuit filtering
Until qualification.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will fall in this Shen
It please be within disclosed scope and spirit.More specifically, disclose in the application, drawings and claims in the range of, can
With the building block and/or a variety of variations and modifications of layout progress to theme combination layout.In addition to building block and/or layout
Outside the modification and improvement of progress, to those skilled in the art, other purposes also be will be apparent.
Claims (7)
1. a kind of passive optical network multi-user unit radiation-emitting positions amelioration method, it is characterised in that the following steps are included:
Diagnose source and the propagation path of interference；
The overlap joint of safety ground in advance is carried out to EMC；
Unwanted frequency component is removed from frequency domain by filtering, reduces electromagnetic disturbance at two aspects of conduction and radiation；
Inhibit the various electromagnetic interferences by spatial by shielding；
Suspicious element is replaced with the element for meeting EMC requirement；
The output energy of crystal oscillator and its harmonic wave is reduced by series resistance or the method for parallel resistance to crystal oscillator product.
2. passive optical network multi-user unit radiation-emitting according to claim 1 positions amelioration method, it is characterised in that:
The source of the diagnosis interference and the method for propagation path are first to find greatest irradiation direction, remove the signal wire of periphery, judgement
EUT power supply line radiation interference power itself obtains source and propagation path.
3. passive optical network multi-user unit radiation-emitting according to claim 2 positions amelioration method, it is characterised in that:
After the signal wire for removing periphery, if the frequency point for crossing EUT Fail is still very high, each master on the probe detection circuit plate of magnetic field
The intensity of members noise jamming is wanted relatively to find high point, the component's feet company of electric field probe or probe detection major part
It connects device and relatively finds high point.
4. passive optical network multi-user unit radiation-emitting according to claim 2 or 3 positions amelioration method, feature exists
In: when the source of the diagnosis interference and propagation path, checked whether to EUT metal shell screw tightening, plug receptacle
Whether ground connection is well checked.
5. passive optical network multi-user unit radiation-emitting according to claim 2 or 3 positions amelioration method, feature exists
In: when the signal wire for removing periphery, retains power supply line, add core to judge non-removable signal wire.
6. passive optical network multi-user unit radiation-emitting according to claim 2 positions amelioration method, it is characterised in that:
Judgement EUT itself the power supply line radiation interference power show that the specific method is as follows with propagation path in source:
After pulling out all extra cables, if radiation is qualified, cable common mode current problem is eliminated, then by all cables and equipment
It connects, judges whether radiation is qualified, it is qualified then complete to judge, it is unqualified, continue to eliminate common mode current solution again；
If after pulling out all extra cables, radiation is still unqualified, then increase magnet ring on the power line, is radiated after increasing magnet ring
It is inhibited, then eliminates common mode current using processing filter, it is qualified after elimination then to complete, if radiating after increasing magnet ring does not have
It is inhibited or unqualified, then checks cabinet shield effectiveness.
7. passive optical network multi-user unit radiation-emitting according to claim 6 positions amelioration method, it is characterised in that:
The elimination common mode current method for eliminating cable is, to ferrite bead in cable cover, if cannot filter, uses or improve screen
Cable is covered, circuit filtering is used if it can filter；
If after putting on ferrite bead, having improvement but unqualified, then it is further added by magnet ring, and reach qualified using circuit filtering
Until.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910288907.5A CN109819641B (en) | 2019-04-11 | 2019-04-11 | Multi-user unit radiation emission positioning and reforming method for passive optical network |
| PCT/CN2020/078941 WO2020207181A1 (en) | 2019-04-11 | 2020-03-12 | Radiated emission positioning rectification method for multi-user unit of passive optical network |
| KR1020207027618A KR20200127210A (en) | 2019-04-11 | 2020-03-12 | Method for calibrating the radiated emission position of multi-user units in passive optical networks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910288907.5A CN109819641B (en) | 2019-04-11 | 2019-04-11 | Multi-user unit radiation emission positioning and reforming method for passive optical network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109819641A true CN109819641A (en) | 2019-05-28 |
| CN109819641B CN109819641B (en) | 2020-12-11 |
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ID=66611689
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910288907.5A Active CN109819641B (en) | 2019-04-11 | 2019-04-11 | Multi-user unit radiation emission positioning and reforming method for passive optical network |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20200127210A (en) |
| CN (1) | CN109819641B (en) |
| WO (1) | WO2020207181A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020207181A1 (en) * | 2019-04-11 | 2020-10-15 | 太仓市同维电子有限公司 | Radiated emission positioning rectification method for multi-user unit of passive optical network |
| CN112305500A (en) * | 2020-09-25 | 2021-02-02 | 苏州浪潮智能科技有限公司 | Positioning method and device of radiation emission source and electronic equipment |
| CN112996373A (en) * | 2019-12-12 | 2021-06-18 | 广州彩泰电子科技有限公司 | Comprehensive electromagnetic radiation prevention method for outdoor display equipment |
| CN113567760A (en) * | 2021-07-23 | 2021-10-29 | 重庆金康动力新能源有限公司 | Method and device for rectifying generator controller, storage medium and computer equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313851A (en) * | 2011-06-30 | 2012-01-11 | 重庆大学 | Method for testing electromagnetic interference propagation path of motor drive system of pure electric vehicle |
| US20150227665A1 (en) * | 2014-02-07 | 2015-08-13 | Freescale Semiconductor, Inc. | Method of optimizing the design of an electronic device with respect to electromagnetic emissions based on frequency spreading introduced by hardware, computer program product for carrying out the method and associated article of manufacture |
| CN105514898A (en) * | 2015-11-27 | 2016-04-20 | 中国电力科学研究院 | Magnet ring optimization combination method for suppressing electromagnetic scattering |
| CN106019023A (en) * | 2016-07-05 | 2016-10-12 | 广东中认华南检测技术有限公司 | Electromagnetic oven electromagnetic compatible optimization method |
| CN106499564A (en) * | 2016-12-14 | 2017-03-15 | 安徽江淮汽车集团股份有限公司 | A kind of method for reducing car load broadband radiation and engine igniting system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109819641B (en) * | 2019-04-11 | 2020-12-11 | 太仓市同维电子有限公司 | Multi-user unit radiation emission positioning and reforming method for passive optical network |
-
2019
- 2019-04-11 CN CN201910288907.5A patent/CN109819641B/en active Active
-
2020
- 2020-03-12 WO PCT/CN2020/078941 patent/WO2020207181A1/en active Application Filing
- 2020-03-12 KR KR1020207027618A patent/KR20200127210A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313851A (en) * | 2011-06-30 | 2012-01-11 | 重庆大学 | Method for testing electromagnetic interference propagation path of motor drive system of pure electric vehicle |
| US20150227665A1 (en) * | 2014-02-07 | 2015-08-13 | Freescale Semiconductor, Inc. | Method of optimizing the design of an electronic device with respect to electromagnetic emissions based on frequency spreading introduced by hardware, computer program product for carrying out the method and associated article of manufacture |
| CN105514898A (en) * | 2015-11-27 | 2016-04-20 | 中国电力科学研究院 | Magnet ring optimization combination method for suppressing electromagnetic scattering |
| CN106019023A (en) * | 2016-07-05 | 2016-10-12 | 广东中认华南检测技术有限公司 | Electromagnetic oven electromagnetic compatible optimization method |
| CN106499564A (en) * | 2016-12-14 | 2017-03-15 | 安徽江淮汽车集团股份有限公司 | A kind of method for reducing car load broadband radiation and engine igniting system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020207181A1 (en) * | 2019-04-11 | 2020-10-15 | 太仓市同维电子有限公司 | Radiated emission positioning rectification method for multi-user unit of passive optical network |
| CN112996373A (en) * | 2019-12-12 | 2021-06-18 | 广州彩泰电子科技有限公司 | Comprehensive electromagnetic radiation prevention method for outdoor display equipment |
| CN112305500A (en) * | 2020-09-25 | 2021-02-02 | 苏州浪潮智能科技有限公司 | Positioning method and device of radiation emission source and electronic equipment |
| CN113567760A (en) * | 2021-07-23 | 2021-10-29 | 重庆金康动力新能源有限公司 | Method and device for rectifying generator controller, storage medium and computer equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020207181A1 (en) | 2020-10-15 |
| CN109819641B (en) | 2020-12-11 |
| KR20200127210A (en) | 2020-11-10 |
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