CN104020381B - A kind of method analyzing car load and parts RE value relation - Google Patents
A kind of method analyzing car load and parts RE value relation Download PDFInfo
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- CN104020381B CN104020381B CN201410275561.2A CN201410275561A CN104020381B CN 104020381 B CN104020381 B CN 104020381B CN 201410275561 A CN201410275561 A CN 201410275561A CN 104020381 B CN104020381 B CN 104020381B
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Abstract
The invention discloses a kind of method analyzing car load and parts RE value relation, it relates to technical field of automobile detection, it comprises the steps of (one), ALSE room simulation car load test outdoor sports ground (OTS) of test electronic apparatus parts, the requirement of test environment is consistent, therefore the analysis for the two RE value provides feasibility；(2), measure point and be only plane wave from radiation-emitting frequency f of tested part (DUT) 1m, DUT more than or equal to the electromagnetic wave of 50MHz, pad value with apart from linear inverse ratio；(3), utilize the formula derived that the RE data of the tested part on top are processed, calculate the distribution of theoretical value, and compare with the car load RE limit value grade formulated；(4), according to comparative result, parts equivalence number and RE limit value grade are formulated.It is for reasonable distribution or formulates parts and the offer reference of car load EMC index.
Description
Technical field:
The present invention relates to a kind of method analyzing car load and parts RE value relation, belong to technical field of automobile detection.
Background technology:
The most domestic execution about automotive electronics electrical component electromagnetic radiation (radiation-emitting hereinafter referred to as RE)
Standard is GB 18655-2010, and the execution standard about vehicle complete vehicle RE is GB 14023-2011, but two standards are the most not
Illustrate the relation of electronic apparatus parts RE and car load RE.
Summary of the invention:
For the problems referred to above, the technical problem to be solved in the present invention is to provide a kind of analysis car load and parts RE value relation
Method.
A kind of method analyzing car load and parts RE value relation of the present invention, it comprises the steps of one, tests electronics
ALSE room simulation car load test outdoor sports ground (OTS) of electrical component, the requirement to environment noise is also consistent, is desirable that than limit
Be worth the lowest 6 dB, and the parameter of test equipment EMI receiver and require consistent, thus for both the analysis of RE value provide can
Row, to this end, we need first to select an environment meeting test request like this；
Two, for electronic apparatus parts, some tranmitting frequency f from tested part (DUT) 1m, DUT radiation is measured
The electromagnetic wave of >=50MHz is only plane wave, and pad value, with apart from linear inverse ratio, can calculate this plane wave at 3m and 10m
Place's RE value, and then the distribution of car load RE value can be drawn, environment noise is also contemplated for including, calculating such as formula during test
(1):
………… (1)
A is car load RE value；
When all parts radiation signals are unrelated signal, then A has a lower limit:
When all parts radiation signals are coherent signal, then A has a higher limit:
N is the equivalent number of the automotive electronics electrical part with electromagnetic radiation；
=, the square root of the meansigma methods of the most each electronic apparatus part RE value square sum；
=, the meansigma methods of the most each electronic apparatus part RE value sum；
For environment noise；
When car load RE value is surveyed by 10 meters of methods, X=20dB (μ V/m);
When car load RE value is surveyed by 3 meters of methods, X=10 dB (μ V/m);
This formula is suitable for frequency range f >=50MHz；
For the electromagnetic wave of the 30M-50MHz of car load radiation-emitting, the electromagnetic field at 1m is near field region, and therefore decay speed
Spend faster, so the RE value of the electromagnetic wave of 30M-50MHz is not more than the higher limit of formula (1)；
(1) formula is it is to be appreciated that each parts are in the concrete RE value of each frequency range, and amount of calculation is relatively big, can be used for car load RE value more smart
True calculating, in order to simplify calculating, rapid evaluation car load RE value, can not calculateWithSize, expands the bound of A
Value size, such as formula (2):…………………(2)
For the value that transmitted value in electronic apparatus is minimum；
For the value that transmitted value in electronic apparatus is maximum；
Three, utilize the formula derived that the RE data of the tested part on top are processed, calculate dividing of theoretical value
Cloth scope, and compare with the car load RE limit value grade formulated；
Four, parts equivalence number and RE limit value grade are formulated.
The invention have the benefit that and it provide a kind of simple test car load and the side of parts RE value relation accurately
Method, provides reference for reasonable distribution or formulation parts with car load EMC index.
Accompanying drawing illustrates:
For ease of explanation, the present invention is embodied as and accompanying drawing is described in detail by following.
Fig. 1 is the method step flow chart of detailed description of the invention one,
Fig. 2 is the relation table of parts equivalence number and the car load RE maximum in the present invention with RE,
Fig. 3 is GB14023-2011 meansigma methods limit value schematic diagram in embodiment,
Fig. 4 is GB14023-2011 peak value and quasi-peak value limit value schematic diagram in embodiment,
Fig. 5 is GB18655-2010 peak value and quasi-peak value schematic diagram in embodiment,
Fig. 6 is that Fig. 5 continues,
Fig. 7 is GB18655-2010 meansigma methods schematic diagram in embodiment,
Fig. 8 is that Fig. 7 continues.
Fig. 9 is the method step flow chart of detailed description of the invention two.
Detailed description of the invention:
For making the object, technical solutions and advantages of the present invention of greater clarity, concrete below by shown in accompanying drawing
Embodiment describes the present invention.However, it should be understood that these describe the most exemplary, and it is not intended to limit the model of the present invention
Enclose.Additionally, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring the present invention's
Concept.
Detailed description of the invention one: as it is shown in figure 1, this detailed description of the invention is by the following technical solutions: it comprises following step
Rapid: one, ALSE room simulation car load test outdoor sports ground (OTS) of test electronic apparatus parts, to the requirement of environment noise also
Unanimously, it is desirable that the lowest 6 dB of limit ratio, and the parameter of test equipment EMI receiver and require consistent, therefore RE both being
The analysis of value provides feasibility, to this end, we need first to select an environment meeting test request like this；
Two, for electronic apparatus parts, tranmitting frequency f that measurement point radiates from tested part (DUT) 1m, DUT >=
The electromagnetic wave of 50MHz is only plane wave, and pad value, with apart from linear inverse ratio, can calculate this plane wave at 3m and 10m
RE value, and then the distribution of car load RE value can be drawn, environment noise is also contemplated for including, calculate during test such as formula (1):
………… (1)
A is car load RE value；
When all parts radiation signals are unrelated signal, then A has a lower limit:
When all parts radiation signals are coherent signal, then A has a higher limit:
N is the equivalent number of the automotive electronics electrical part with electromagnetic radiation；
=, the square root of the meansigma methods of the most each electronic apparatus part RE value square sum；
=, the meansigma methods of the most each electronic apparatus part RE value sum；
For environment noise；
When car load RE value is surveyed by 10 meters of methods, X=20dB (μ V/m);
When car load RE value is surveyed by 3 meters of methods, X=10 dB (μ V/m);
This formula is suitable for frequency range f >=50MHz；
For the electromagnetic wave of the 30M-50MHz of car load radiation-emitting, the electromagnetic field at 1m is near field region, and therefore decay speed
Spend faster, so the RE value of the electromagnetic wave of 30M-50MHz is not more than the higher limit of formula (1)；
(1) formula is it is to be appreciated that each parts are in the concrete RE value of each frequency range, and amount of calculation is relatively big, can be used for car load RE value more smart
True calculating, in order to simplify calculating, rapid evaluation car load RE value, can not calculateWithSize, expands the upper lower limit value of A
Size, such as formula (2):……………(2)
For the value that transmitted value in electronic apparatus is minimum；
For the value that transmitted value in electronic apparatus is maximum；
Three, utilize the formula derived that the RE data of the tested part on top are processed, calculate dividing of theoretical value
Cloth scope, and compare with the car load RE limit value grade formulated, in general, depot all can require that the RE value of parts exists
Certain frequency range is not more than certain limit value；
Limit value is divided into 5 grades by such as GB 18655, then can make=,The limit value specified for standard,
Because environment noiseThe minimum low 6dB of limit ratio, the error that superposition is caused is less than 1dB, negligibleImpact, i.e.If=0 with 10 meters of method tests of car load RE, order=0, formula (2) can be calculated the relation table of Fig. 2；
In Fig. 2, parts equivalence number refers to the parts number of different limit value requirements is carried out equivalent process, the most whole
Most of part limit values on car require to be grade 3, then being then equivalent to two limit values for the part that limit value is grade 2 is grade
The part of 3；(because grade 2 limit value and grade 3 limit value are grade 3 limit value at the most big 6dB of frequency range, i.e. grade 2 limit value
2 times)；
As long as from the relation table of Fig. 2 it can be seen that parts equivalence number and RE limit value grade are controlled at zone of reasonableness
In, can well control car load RE value；
Four, parts equivalence number and RE limit value grade are formulated.
Detailed description of the invention two: referring to Fig. 9, this detailed description of the invention is institute with the difference of detailed description of the invention one
According to computing formula, the step 4 stated, for just presetting parts equivalence number before test, show that parts RE value needs to meet
Grade.Other method and steps is identical with detailed description of the invention one.This detailed description of the invention is greatly reduced car load RE value and is not inconsistent
Close the probability that limit value requires.
Embodiment:
Being up to 17 electronic apparatus parts when certain car load RE tests has radiation-emitting at present, it is contemplated that windscreen wiper electricity
The control of the RE value of machine, electromotor and urea pump is more difficult, and its limit value can be allowed to be higher than one grade of other device, by accompanying drawing 3-8
Understanding, the limit value of two adjacent ranks differs 6 dB, then parts equivalence number during car load test with RE is 20, in conjunction with
From the point of view of the limit value of the relation table of Fig. 2 and two standards, making peak value and quasi-peak value limit value requirement is no more than GB 18655-2010
Level 3, meansigma methods requires to be no more than GB 18655-2010 class 4, car load RE value can be made to substantially meet standard GB 14023-
2011.For other standard, such as the mark requirement of enterprise of car enterprise, this method is equally applicable.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (2)
1. the method analyzing car load and parts RE value relation, it is characterised in that: it comprises the steps of (one), test
ALSE room simulation car load test outdoor sports ground (OTS) of electronic apparatus parts, the requirement to environment noise is also consistent, is desirable that
The lowest 6 dB of limit ratio, and the test parameter of equipment EMI receiver and require consistent, therefore for the analysis offer of the two RE value
Feasibility, to this end, we need first to select an environment meeting test request like this；
(2), for electronic apparatus parts, tranmitting frequency f that measurement point radiates from tested part (DUT) 1m, DUT >=
The electromagnetic wave of 50MHz is only plane wave, and pad value, with apart from linear inverse ratio, can calculate this plane wave at 3m and 10m
RE value, and then the distribution of car load RE value can be drawn, environment noise is also contemplated for including, calculate during test such as formula (1):
………….. (1)
A is car load RE value；
When all parts radiation signals are unrelated signal, then A has a lower limit:
When all parts radiation signals are coherent signal, then A has a higher limit:
N is the equivalent number of the automotive electronics electrical part with electromagnetic radiation；
=, the square root of the meansigma methods of the most each electronic apparatus part RE value square sum；
=, the meansigma methods of the most each electronic apparatus part RE value sum；
For environment noise；
When car load RE value is surveyed by 10 meters of methods, X=20dB (μ V/m);
When car load RE value is surveyed by 3 meters of methods, X=10 dB (μ V/m);
This formula is suitable for frequency range f >=50MHz；
For the electromagnetic wave of the 30M-50MHz of car load radiation-emitting, the electromagnetic field at 1m is near field region, and therefore the rate of decay is more
Hurry up, so the RE value of the electromagnetic wave of 30M-50MHz is not more than the higher limit of formula (1)；
(1) formula is it is to be appreciated that each parts are in the concrete RE value of each frequency range, and amount of calculation is relatively big, can be used for counting car load RE value more accurately
Calculate, in order to simplify calculating, rapid evaluation car load RE value, can not calculateWithSize, expands the upper lower limit value size of A, as
Formula (2):…………………(2)
For the value that transmitted value in electronic apparatus is minimum；
For the value that transmitted value in electronic apparatus is maximum；
(3), utilize the formula derived that the RE data of the tested part on top are processed, calculate the distribution of theoretical value
Scope, and compare with the car load RE limit value grade formulated；
(4), parts equivalence number and RE limit value grade are formulated.
A kind of method analyzing car load and parts RE value relation the most according to claim 1, it is characterised in that: described
Step (four) is just to preset parts equivalence number before test, draws what parts RE value needs met according to computing formula
Grade.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590812A1 (en) * | 1992-09-28 | 1994-04-06 | Gpt Limited | EMC and ESD test arrangement and apparatus |
| EP1195303A2 (en) * | 2000-10-05 | 2002-04-10 | Mazda Motor Corporation | Overall control system for a posture control apparatus and a continuously variable transmission of a vehicle |
| CN102279331A (en) * | 2011-06-30 | 2011-12-14 | 重庆大学 | Method for detecting and analyzing radiated electromagnetic interference of wiring harnesses of power conversion system of automobile |
| CN103502052A (en) * | 2011-05-05 | 2014-01-08 | 欧司朗光电半导体有限公司 | Radiation-emitting apparatus and use of an apparatus of this kind |
-
2014
- 2014-06-19 CN CN201410275561.2A patent/CN104020381B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590812A1 (en) * | 1992-09-28 | 1994-04-06 | Gpt Limited | EMC and ESD test arrangement and apparatus |
| EP1195303A2 (en) * | 2000-10-05 | 2002-04-10 | Mazda Motor Corporation | Overall control system for a posture control apparatus and a continuously variable transmission of a vehicle |
| CN103502052A (en) * | 2011-05-05 | 2014-01-08 | 欧司朗光电半导体有限公司 | Radiation-emitting apparatus and use of an apparatus of this kind |
| CN102279331A (en) * | 2011-06-30 | 2011-12-14 | 重庆大学 | Method for detecting and analyzing radiated electromagnetic interference of wiring harnesses of power conversion system of automobile |
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