CN107024616A - A kind of method and system for improving electromagnetic disturbance source diagnosis efficiency - Google Patents
A kind of method and system for improving electromagnetic disturbance source diagnosis efficiency Download PDFInfo
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- CN107024616A CN107024616A CN201710313924.0A CN201710313924A CN107024616A CN 107024616 A CN107024616 A CN 107024616A CN 201710313924 A CN201710313924 A CN 201710313924A CN 107024616 A CN107024616 A CN 107024616A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention proposes a kind of method and system for improving electromagnetic disturbance source diagnosis efficiency, the method of " the frequency multiplication difference table " and " waveform frequency spectrum corresponding table " that proposes, quick diagnosis flow, when a electromagnetic disturbance test data of acquisition, the spectrum waveform of exceeded point can be observed according to " spectrum ripple waveform corresponding table " proposed by the present invention first, when the waveform comparison rule can be with Primary Location, by the above method and traditional " IO plugs positioning mode ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework positioning modes " combine, formed completely, careful flow, harassing and wrecking source can be carried out quick, expliciting the position, more information is captured, improve efficiency.
Description
Technical field
It is more particularly to a kind of to improve electromagnetic disturbance source diagnosis efficiency the present invention relates to the technical field of server electromagnetic compatibility
Method and system.
Background technology
Electromagnetic disturbance is a serious and ever-increasing environmental pollution form, its influence as low as broadcast reception when produce
Allow the crack that people is sick of, the big life accident to caused by being disturbed because of control system.And radiation disturbance is electromagnetic disturbance
In most important interference mode, its direct outside radiated electromagnetic energy in the form of an electromagnetic wave, so as to human body and other equipment
Damage and disturb.
In order to control radiation disturbance, the standard that correlation has been formulated in the world carries out management and control, when EMC emission test exceedes mark
Standard, is just prohibited listing.Therefore EMC emission test is the most important and most frequent test of progress in electromagnetic compatibility test, still
The measurement of electromagnetic disturbance allows many enterprises to suffer untold misery with rectification expense, but in order to which access authentication is permitted, has to a large amount of
Input.In order to reduce testing time and reduction testing expense, it is very necessary to improve the diagnosis efficiency in electromagnetic disturbance source.At present
The method in industry diagnosing radiation harassing and wrecking source has:IO plugs positioning mode, displacement positioning mode, mechanism shielding overlap joint positioning mode, Rework
Positioning mode.
IO plugs positioning mode：I.e. by plugging the external cable of I/O connector come the source of location interference, such as netting twine, USB
Line and VGA line, their source be probably corresponding signal in itself, it is also possible to the signal that crosstalk comes.This method is very simple
Just, have the disadvantage：If it is determined that being the signal that crosstalk comes, harassing and wrecking source is further searched for.
Replace positioning mode：I.e. by replacing the parts of other producers or model, come judge whether be source method, often
For CPU, internal memory, power module, subcard etc..
Mechanism shielding overlap joint positioning mode：We are using the shielding materials such as aluminium foil closure gap and perforate, or use conduction
Foam blocks gap, or removes the insulated paint reinforcement electric conductivity overlap joint of metal surface, and harassing and wrecking source is positioned with this.
Rework positioning modes：I.e. when we suspect that noise comes from mainboard, and general areas is guessed, use rework
Method, shutoff signal, attenuated signal or changes the method for zero device and judges the source of noise.
The characteristics of above method and the problem of exist it is：These methods are most basic methods, are a kind of methods traced to the source,
Attempt many times, could be by positioning problems, efficiency is very low, therefore, in the art, need badly one kind can from test data and
The method that test waveform carries out Primary Location screening.
The content of the invention
Based on above mentioned problem, the invention provides a kind of method and system for improving electromagnetic disturbance source diagnosis efficiency, this hair
Bright technical scheme improves the electromagnetic compatibility problem diagnosis efficiency of server product, improves design level, reduces and research and develop into
This.
The present invention provides following technical scheme：
On the one hand, the present invention provides a kind of method for improving electromagnetic disturbance source diagnosis efficiency, including：
Step A, frequency multiplication difference table is set up based on test data；
Step B, POP waveform corresponding table is set up based on test waveform；
Step C, positioning mode, displacement positioning mode, machine are plugged according to the frequency multiplication difference table, the POP waveform corresponding table and IO
Structure shielding overlap joint positioning mode or Rework positioning modes diagnosis electromagnetic disturbance source.
Wherein, the frequency multiplication difference table includes the sine wave freuqency amplitude of all elements, and the sine wave includes base
Frequency and n times harmonic wave, the frequency multiplication difference table are classified as sine wave freuqency amplitude, behavior fundamental frequency and n times harmonic wave, and N is more than or equal to
2。
Wherein, the step A, fundamental frequency is navigated to according to n times harmonic wave, judges electromagnetic disturbance source.
Wherein, the POP waveform corresponding table includes：Spread spectrum waveform, arch bridge waveform, wave waveform and mountain peak waveform,
Electromagnetic disturbance source is positioned according to electromagnetic disturbance source waveform.
Wherein, the corresponding harassing and wrecking source of the spread spectrum waveform includes internal memory, PCIE, the corresponding harassing and wrecking source bag of the arch bridge waveform
Include crystal oscillator, LAN, the corresponding harassing and wrecking source of the wave waveform includes keyboard and mouse, AC power supplies, the corresponding harassing and wrecking of the mountain peak waveform
Source includes VGA, USB.
In addition, the present invention also provides a kind of system for improving electromagnetic disturbance source diagnosis efficiency, the system includes：
Frequency multiplication difference table module, for setting up frequency multiplication difference table based on test data；
POP waveform corresponding table module, for setting up POP waveform corresponding table based on test waveform；
Diagnostic module, determines for plugging positioning mode, displacement according to the frequency multiplication difference table, the POP waveform corresponding table and IO
Position method, mechanism shielding overlap joint positioning mode or Rework positioning modes diagnosis electromagnetic disturbance source.
Wherein, the frequency multiplication difference table includes the sine wave freuqency amplitude of all elements, and the sine wave includes base
Frequency and n times harmonic wave, the frequency multiplication difference table are classified as sine wave freuqency amplitude, behavior fundamental frequency and n times harmonic wave, and N is more than or equal to
2。
Wherein, the frequency multiplication difference table module, fundamental frequency is navigated to according to n times harmonic wave, judges electromagnetic disturbance source.
Wherein, the POP waveform corresponding table includes：Spread spectrum waveform, arch bridge waveform, wave waveform and mountain peak waveform,
Electromagnetic disturbance source is positioned according to electromagnetic disturbance source waveform.
Wherein, the corresponding harassing and wrecking source of the spread spectrum waveform includes internal memory, PCIE, the corresponding harassing and wrecking source bag of the arch bridge waveform
Include crystal oscillator, LAN, the corresponding harassing and wrecking source of the wave waveform includes keyboard and mouse, AC power supplies, the corresponding harassing and wrecking of the mountain peak waveform
Source includes VGA, USB.
The present invention proposes a kind of method and system for improving electromagnetic disturbance source diagnosis efficiency, " the frequency multiplication difference table " of proposition
The method of " waveform frequency spectrum corresponding table ", quick diagnosis flow, by the above method and traditional " IO plugs positioning mode ", " displacement
Positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework positioning modes " combine, and form complete, careful stream
Journey, can carry out quick, expliciting the position to harassing and wrecking source, capture more information, improved efficiency.
Brief description of the drawings
Fig. 1 is the electromagnetic disturbance source diagnostic flow chart of the present invention；
Fig. 2 is the system architecture diagram of the present invention；
Embodiment
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below by using required in embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
On the one hand, the present invention provides a kind of method for improving electromagnetic disturbance source diagnosis efficiency, including：
Step 101, frequency multiplication difference table is set up based on test data；
Propose a kind of " frequency multiplication difference table " based on test data.
Sine wave is the waveform uniquely existed in frequency domain, and sine wave is the description to frequency domain.Sine wave is used in a frequency domain
It is because any waveform in time domain can be synthesized with sine wave.The information that time domain or the frequency domain description of same waveform are contained is complete
It is exactly the same, and it is more more convenient than time domain to handle some problems in a frequency domain, thus we need will be common on our mainboards
Time-domain signal be transformed into frequency domain.
The frequency spectrum designation that amplitude in EMC emission test, i.e. signal are transformed from the time domain in the frequency spectrum of frequency domain, frequency domain
It is exactly the amplitude of all sine wave freuqencies that signal waveform is included in time domain.And any one periodic signal can in frequency domain
Countless regular sine waves are resolved into Fourier transform, these sine wave rules are：Respectively 2 times of minimum frequency, 3 times, 4
Times ..., fundamental frequency, 2 subharmonic, 3 subharmonic, 4 subharmonic are can be described as respectively.So some exceeded points are possible to be some week
The nth harmonic of phase signal, we collect the nth harmonic of periodic signal common on mainboard, make table, it is possible to according to
Harmonic wave frequency quickly navigates to fundamental frequency, so that where judging radiation disturbance source substantially.Frequency multiplication difference table is as shown in table 1：
Table 1：Frequency multiplication difference table
Step 102, POP waveform corresponding table is set up based on test waveform；
Propose a kind of " spectrum ripple waveform corresponding table " based on test waveform；
It will radiate after the exceeded frequency of test is amplified on frequency spectrum, it is found that many waveforms have the feature of uniqueness, I looks for
To the rule of these features, when running into similar frequency spectrum again, Primary Location promptly can be carried out to harassing and wrecking source.Such as table 2
Shown in：Common wave character has " spread spectrum waveform ", " arch bridge waveform ", " wave waveform " and " mountain peak waveform " etc..
Table 2：
Step 103, positioning mode, displacement is plugged according to the frequency multiplication difference table, the POP waveform corresponding table and IO to determine
Position method, mechanism shielding overlap joint positioning mode or Rework positioning modes diagnosis electromagnetic disturbance source.
When the waveform comparison rule can be with Primary Location, we reuse " frequency multiplication difference table " and common " IO plugs
Positioning mode ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework positioning modes " are accurately positioned.When the ripple
Shape does not have obvious rule, and we directly carry out Primary Location in " frequency multiplication difference table ", reuses common " IO plug positioning
Method ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework positioning modes " are accurately positioned, and are obtained electromagnetism and are disturbed
Disturb source position.
" frequency multiplication difference table " and " spectrum ripple waveform corresponding table " is the relation proved and complemented each other mutually, that is to say, that had
A little exceeded points can carry out Primary Location by any of " frequency multiplication difference table " and " spectrum ripple waveform corresponding table " two methods, so
Proved, or proved using other four kinds of commonsense methods using another afterwards.
The present invention proposes a kind of method for improving electromagnetic disturbance source diagnosis efficiency, " the frequency multiplication difference table " of proposition and " ripple
The method of shape frequency spectrum corresponding table ", quick diagnosis flow, first can be according to this hair when obtaining a electromagnetic disturbance test data
The spectrum waveform of " spectrum ripple waveform corresponding table " exceeded point of observation of bright proposition, when the waveform comparison rule can be with Primary Location,
By the above method with traditional " IO plugs positioning mode ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework is fixed
Position method " is combined, and forms complete, careful flow, and quick, expliciting the position, crawl can be carried out to harassing and wrecking source
More information, improves efficiency.
The present invention also provides the present invention and provides a kind of system for improving electromagnetic disturbance source diagnosis efficiency, including：
Frequency multiplication difference table module 201, for setting up frequency multiplication difference table based on test data；
Propose a kind of " frequency multiplication difference table " based on test data.
Sine wave is the waveform uniquely existed in frequency domain, and sine wave is the description to frequency domain.Sine wave is used in a frequency domain
It is because any waveform in time domain can be synthesized with sine wave.The information that time domain or the frequency domain description of same waveform are contained is complete
It is exactly the same, and it is more more convenient than time domain to handle some problems in a frequency domain, thus we need will be common on our mainboards
Time-domain signal be transformed into frequency domain.
The frequency spectrum designation that amplitude in EMC emission test, i.e. signal are transformed from the time domain in the frequency spectrum of frequency domain, frequency domain
It is exactly the amplitude of all sine wave freuqencies that signal waveform is included in time domain.And any one periodic signal can in frequency domain
Countless regular sine waves are resolved into Fourier transform, these sine wave rules are：Respectively 2 times of minimum frequency, 3 times, 4
Times ..., fundamental frequency, 2 subharmonic, 3 subharmonic, 4 subharmonic are can be described as respectively.So some exceeded points are possible to be some week
The nth harmonic of phase signal, we collect the nth harmonic of periodic signal common on mainboard, make table, it is possible to according to
Harmonic wave frequency quickly navigates to fundamental frequency, so that where judging radiation disturbance source substantially.Frequency multiplication difference table is as shown in table 1：
Table 1：Frequency multiplication difference table
POP waveform corresponding table module 202, for setting up POP waveform corresponding table based on test waveform；
Propose a kind of " spectrum ripple waveform corresponding table " based on test waveform；
It will radiate after the exceeded frequency of test is amplified on frequency spectrum, it is found that many waveforms have the feature of uniqueness, I looks for
To the rule of these features, when running into similar frequency spectrum again, Primary Location promptly can be carried out to harassing and wrecking source.Such as table 2
Shown in：Common wave character has " spread spectrum waveform ", " arch bridge waveform ", " wave waveform " and " mountain peak waveform " etc..
Table 2：
Diagnostic module 203, is positioned for being plugged according to the frequency multiplication difference table, the POP waveform corresponding table and IO
Method, displacement positioning mode, mechanism shielding overlap joint positioning mode or Rework positioning modes diagnosis electromagnetic disturbance source.
When the waveform comparison rule can be with Primary Location, we reuse " frequency multiplication difference table " and common " IO plugs
Positioning mode ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework positioning modes " are accurately positioned.When the ripple
Shape does not have obvious rule, and we directly carry out Primary Location in " frequency multiplication difference table ", reuses common " IO plug positioning
Method ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework positioning modes " are accurately positioned, and are obtained electromagnetism and are disturbed
Disturb source position.
" frequency multiplication difference table " and " spectrum ripple waveform corresponding table " is the relation proved and complemented each other mutually, that is to say, that had
A little exceeded points can carry out Primary Location by any of " frequency multiplication difference table " and " spectrum ripple waveform corresponding table " two methods, so
Proved, or proved using other four kinds of commonsense methods using another afterwards.
The present invention proposes a kind of system for improving electromagnetic disturbance source diagnosis efficiency, " the frequency multiplication difference table " of proposition and " ripple
The method of shape frequency spectrum corresponding table ", quick diagnosis flow, first can be according to this hair when obtaining a electromagnetic disturbance test data
The spectrum waveform of " spectrum ripple waveform corresponding table " exceeded point of observation of bright proposition, when the waveform comparison rule can be with Primary Location,
By the above method with traditional " IO plugs positioning mode ", " displacement positioning mode ", " mechanism shielding overlap joint positioning mode " and " Rework is fixed
Position method " is combined, and forms complete, careful flow, and quick, expliciting the position, crawl can be carried out to harassing and wrecking source
More information, improves efficiency.
The foregoing description of the disclosed embodiments, enables those skilled in the art to realize or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and generic principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
The embodiments shown herein is formed on, but meets the most wide model consistent with features of novelty with principles disclosed herein
Enclose.
Claims (10)
1. a kind of method for improving electromagnetic disturbance source diagnosis efficiency, it is characterised in that：
Step A, frequency multiplication difference table is set up based on test data；
Step B, POP waveform corresponding table is set up based on test waveform；
Step C, positioning mode, displacement positioning mode, machine are plugged according to the frequency multiplication difference table, the POP waveform corresponding table and IO
Structure shielding overlap joint positioning mode or Rework positioning modes diagnosis electromagnetic disturbance source.
2. according to the method described in claim 1, it is characterised in that：The frequency multiplication difference table includes the sine wave of all elements
Frequency and Amplitude, and the sine wave includes fundamental frequency and n times harmonic wave, the frequency multiplication difference table is classified as sine wave freuqency amplitude,
Behavior fundamental frequency and n times harmonic wave, N are more than or equal to 2.
3. method according to claim 2, it is characterised in that：The step A, fundamental frequency is navigated to according to n times harmonic wave, is judged
Electromagnetic disturbance source.
4. according to the method described in claim 1, it is characterised in that：The POP waveform corresponding table includes：Spread spectrum waveform, arch
Bridge waveform, wave waveform and mountain peak waveform, electromagnetic disturbance source is positioned according to electromagnetic disturbance source waveform.
5. method according to claim 4, it is characterised in that：The corresponding harassing and wrecking source of the spread spectrum waveform include internal memory,
PCIE, the corresponding harassing and wrecking source of the arch bridge waveform includes crystal oscillator, LAN, and the corresponding harassing and wrecking source of the wave waveform includes keyboard mouse
Mark, AC power supplies, the corresponding harassing and wrecking source of the mountain peak waveform include VGA, USB.
6. a kind of system for improving electromagnetic disturbance source diagnosis efficiency, it is characterised in that：The system includes：
Frequency multiplication difference table module, for setting up frequency multiplication difference table based on test data；
POP waveform corresponding table module, for setting up POP waveform corresponding table based on test waveform；
Diagnostic module, determines for plugging positioning mode, displacement according to the frequency multiplication difference table, the POP waveform corresponding table and IO
Position method, mechanism shielding overlap joint positioning mode or Rework positioning modes diagnosis electromagnetic disturbance source.
7. system according to claim 6, it is characterised in that：The frequency multiplication difference table includes the sine wave of all elements
Frequency and Amplitude, and the sine wave includes fundamental frequency and n times harmonic wave, the frequency multiplication difference table is classified as sine wave freuqency amplitude,
Behavior fundamental frequency and n times harmonic wave, N are more than or equal to 2.
8. system according to claim 7, it is characterised in that：The step A, fundamental frequency is navigated to according to n times harmonic wave, is judged
Electromagnetic disturbance source.
9. system according to claim 6, it is characterised in that：The POP waveform corresponding table includes：Spread spectrum waveform, arch
Bridge waveform, wave waveform and mountain peak waveform, electromagnetic disturbance source is positioned according to electromagnetic disturbance source waveform.
10. system according to claim 9, it is characterised in that：The corresponding harassing and wrecking source of the spread spectrum waveform include internal memory,
PCIE, the corresponding harassing and wrecking source of the arch bridge waveform includes crystal oscillator, LAN, and the corresponding harassing and wrecking source of the wave waveform includes keyboard mouse
Mark, AC power supplies, the corresponding harassing and wrecking source of the mountain peak waveform include VGA, USB.
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Application publication date: 20170808 |