CN104319988B - The system for eliminating the method for interfering frequency and eliminating interfering frequency - Google Patents
The system for eliminating the method for interfering frequency and eliminating interfering frequency Download PDFInfo
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- CN104319988B CN104319988B CN201410509057.4A CN201410509057A CN104319988B CN 104319988 B CN104319988 B CN 104319988B CN 201410509057 A CN201410509057 A CN 201410509057A CN 104319988 B CN104319988 B CN 104319988B
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- 230000002452 interceptive effect Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 230000008030 elimination Effects 0.000 description 9
- 238000003379 elimination reaction Methods 0.000 description 9
- 238000001914 filtration Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006386 memory function Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention discloses a kind of method for eliminating interfering frequency and the system for eliminating interfering frequency, this method includes：S101, when device is in steady-working state, the working frequency of the device is detected using oscillograph；S102, when device is in initial startup state, the detection frequency of the device is detected using oscillograph；S103, the detection frequency of described device and the size of the working frequency are compared using comparator；S104, when the detection frequency is more than or less than the working frequency, then judges the detection frequency for interfering frequency, wave filter is filtered out the signal of the interfering frequency.The problem of needing to preset working frequency is overcome, frequency need not be pre-set by realizing, according to the memory capability of internal unit, automatic detection goes out working frequency.
Description
Technical field
The present invention relates to electromagnetic interference field, in particular it relates to a kind of method for eliminating interfering frequency and elimination interference frequency
The system of rate.
Background technology
In the field of electromagnetic compatibility, eliminating the method for electromagnetic interference has many kinds, the first, use shield technology can be with
Effectively suppress the electromagnetic interference of Switching Power Supply, i.e., electric field is shielded with electrical conductivity good material, use magnetic conductivity
High material is shielded to magnetic field.Shielding has two purposes, and one is that the electromagnetic energy for limiting internal radiation is leaked out, and two be anti-
Only external radiation interference enters the interior zone.Its principle is the reflection, absorption and guiding to electromagnetic energy using shield
Effect.In order to suppress the radiation of Switching Power Supply generation, influence of the electromagnetic disturbance to other electronic equipments can be fully according to magnetic field
The method of shielding processes radome, then by the casing of whole radome and system and connect as one, just can be to electromagnetism
Field is effectively shielded.Second, ground connection is exactly to set up conduction path in point-to-point transmission, so as to which electronic equipment or component are connected
Be connected to it is some be called " " reference point on.Ground connection is the important method of switch power supply equipment suppression electromagnetic interference, and power supply is some
Part is connected with the earth can play a part of suppressing interference.The principle of " one point earth " should be followed in design of circuit system,
If forming multipoint earthing, it may appear that the ground loop of closure, magnetic induction noise will be produced when the magnetic line of force passes through the loop.It is real
" one point earth " is difficult to realize on border, therefore, for reduction impedance ground, the influence of distribution capacity is eliminated and takes plane formula or many
Point ground connection, by the use of a conductive plane as reference ground, it is necessary to which each several part of ground connection is connected in the reference ground nearby.To be further
Reduce the pressure drop of earth-return circuit, the amplitude of return current can be reduced with shunt capacitance.The circuit system coexisted in low frequency and high frequency
In, after should the ground wire of low-frequency channel, high-frequency circuit, power circuit individually be connected respectively, it is connected in common reference point.The
Three kinds, filtering is the effective ways for suppressing Conduction Interference, is had in the EMC Design of equipment or system extremely important
Effect.Electromagnetic interface filter (low-pass filter circuit being made up of current-limiting reactor and shunt capacitor) conducts as power line is suppressed
The significant element of interference, can suppress the infringement of the interference from power network to power supply in itself, can also suppress to be produced by Switching Power Supply
Interference that is raw and being fed back to power network.In filter circuit, also using many special filter elements, such as through condenser, three ends
Capacitor, ferrite bead, they can improve the filtering characteristic of circuit.Rightly design or select wave filter, and correctly
Wave filter is installed and used, is the important component of Anti-Jamming Technique.
The problem of now having following with regard to the third method, needs the work frequency of pre-set machine before machine operation
Rate, so also needs to first detect working frequency, then carries out next step operation, not only troublesome but also time consuming, greatly reduces
Operating efficiency.
The content of the invention
It is an object of the invention to provide a kind of method for eliminating interfering frequency and the system for eliminating interfering frequency, the elimination is done
The method of scrambling rate and the system of elimination interfering frequency overcome the problem of needing to preset working frequency, and realizing need not
Frequency is pre-set, according to the memory capability of internal unit, automatic detection goes out working frequency.
To achieve these goals, the present invention provides a kind of method for eliminating interfering frequency, and this method includes：
S101, when device is in steady-working state, the working frequency of the device is detected using oscillograph；
S102, when device is in initial startup state, the detection frequency of the device is detected using oscillograph；
S103, the detection frequency of described device and the size of the working frequency are compared using comparator；
S104, when the detection frequency is more than or less than the working frequency, then judges the detection frequency for interference
Frequency, wave filter is filtered out the signal of the interfering frequency.
Preferably, in step S104, the interfering frequency is first passed through into reactor and entered again by the wave filter
Row is filtered out.
Preferably, the wave filter is shielded and is grounded.
Preferably, it will be entered between the output line of the input line of the wave filter and the wave filter by dividing plate or screen layer
Row isolation.
The present invention also provides a kind of system for eliminating interfering frequency, and the system includes：Oscillograph, is configured to when device exists
During steady-working state, the working frequency of the device is detected, and when described device is in initial startup state, detect this
The detection frequency of device；
Comparator, the size of the detection frequency and the working frequency that are configured to compare in described device；
Wave filter, is configured to when the detection frequency is more than or less than the working frequency, then judge the detection
Frequency is interfering frequency, and the wave filter is filtered out the signal of the interfering frequency.
Preferably, the system also includes：Reactor, reactor is first passed through again by institute by the interfering frequency
Wave filter is stated to be filtered out.
Preferably, the filter masks and it is grounded.
Preferably, the system also includes：Dividing plate or screen layer, for the input line for isolating the wave filter and the filtering
The output line of device.
By above-mentioned embodiment, method of the invention need not preset working frequency of electronic component threshold value, in electricity
There is the function of a memory under the original state of sub- device, according to the memory function of internal unit, automatic detection goes out the electronics device
The working frequency threshold value of part, sets wave filter by the working frequency threshold value, filters out interfering frequency and leave working frequency.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart of the embodiment for the method for illustrating a kind of elimination interfering frequency of the present invention；
Fig. 2 is the structure chart of the embodiment for the system for illustrating a kind of elimination interfering frequency of the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In a kind of embodiment of the method for elimination interfering frequency of the present invention, it is dry that the present invention provides a kind of elimination
The method of scrambling rate, this method includes：
S101, when device is in steady-working state, the working frequency of the device is detected using oscillograph；
S102, when device is in initial startup state, the detection frequency of the device is detected using oscillograph；
S103, the size of the detection frequency and the working frequency in described device is compared using comparator；
S104, when the detection frequency is more than or less than the working frequency, then judges the detection frequency for interference
Frequency, wave filter is filtered out the signal of the interfering frequency.
By above-mentioned embodiment, method of the invention need not preset working frequency of electronic component threshold value, in electricity
There is the function of a memory under the original state of sub- device, according to the memory function of internal unit, automatic detection goes out the electronics device
The working frequency of part, wave filter is set by the working frequency, filters out interfering frequency to leave working frequency.
Method and system below in conjunction with accompanying drawing 1 and the elimination interfering frequency of accompanying drawing 2 specifically describe how the present invention is
Electromagnetic interference is eliminated, the present invention passes sequentially through reactor and wave filter is eliminated to interfering frequency.
It is in order to preferably filter out interfering frequency, the interfering frequency is first in step S104 in this kind of embodiment
Filtered out again by the wave filter by reactor.
In this kind of embodiment, cause additional electromagnetic radiation in order to avoid the upper short circuit current flow of wave filter, will filter
Ripple device is shielded and is grounded.
In this kind of embodiment, input and output capacitance coupling path in order to avoid wave filter cause crosstalk, reduction
The filtering characteristic of wave filter, by between the input line of wave filter and the output line of wave filter by dividing plate or screen layer carry out every
From.
The present invention also provides a kind of system for eliminating interfering frequency, as shown in Fig. 2 the system includes：Oscillograph, is configured
Into when device is in steady-working state, the working frequency of the device is detected, and when described device is in initial startup state
When, detect the detection frequency of the device；
Comparator, the size of the detection frequency and the working frequency that are configured to compare in described device；
Wave filter, is configured to when the detection frequency is more than or less than the working frequency, then judge the detection
Frequency is interfering frequency, and the wave filter is filtered out the signal of the interfering frequency.
Pass through said system, it is possible to achieve according to the memory function of internal unit, automatic detection goes out the work of the electronic equipment
Working frequency threshold value, sets wave filter by the working frequency threshold value, filters out interfering frequency and leave working frequency.
In a kind of embodiment of the system of elimination interfering frequency of the present invention, the system also includes：Inlet wire electricity
Anti- device, first passes through reactor by the interfering frequency and is filtered out again by the wave filter；It is dry for preferably filtering out
Scrambling rate.
In this kind of embodiment, filter masks and it is grounded.
In this kind of embodiment, the system also includes：Dividing plate or screen layer, input line and filter for separation filter
The output line of ripple device.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (4)
1. a kind of method for eliminating interfering frequency, it is characterised in that this method includes：
S101, when device is in steady-working state, the working frequency of the device is detected using oscillograph；
S102, when device is in initial startup state, the detection frequency of the device is detected using oscillograph；
S103, the detection frequency of described device and the size of the working frequency are compared using comparator；
S104, when the detection frequency is more than or less than the working frequency, then judges the detection frequency for interfering frequency,
The signal of the interfering frequency is filtered out using wave filter；
In step S104, the interfering frequency is first passed through into reactor and filtered out again by the wave filter；
The wave filter is shielded and is grounded.
2. the method according to claim 1 for eliminating interfering frequency, it is characterised in that by the input line of the wave filter and
Isolated between the output line of the wave filter by dividing plate or screen layer.
3. a kind of system for eliminating interfering frequency, it is characterised in that the system includes：Oscillograph, is configured to when device is steady
When determining working condition, the working frequency of the device is detected, and when described device is in initial startup state, detect the dress
The detection frequency put；
Comparator, the size of the detection frequency and the working frequency that are configured to compare in described device；
Wave filter, is configured to when the detection frequency is more than or less than the working frequency, then judge the detection frequency
For interfering frequency, the wave filter is filtered out the signal of the interfering frequency；The system also includes：Reactor, will
The interfering frequency first passes through reactor and filtered out again by the wave filter；The filter masks and it is grounded.
4. the system according to claim 3 for eliminating interfering frequency, it is characterised in that the system also includes：Dividing plate or screen
Layer is covered, for isolating the input line of the wave filter and the output line of the wave filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509057.4A CN104319988B (en) | 2014-09-28 | 2014-09-28 | The system for eliminating the method for interfering frequency and eliminating interfering frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509057.4A CN104319988B (en) | 2014-09-28 | 2014-09-28 | The system for eliminating the method for interfering frequency and eliminating interfering frequency |
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| Publication Number | Publication Date |
|---|---|
| CN104319988A CN104319988A (en) | 2015-01-28 |
| CN104319988B true CN104319988B (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410509057.4A Active CN104319988B (en) | 2014-09-28 | 2014-09-28 | The system for eliminating the method for interfering frequency and eliminating interfering frequency |
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| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176667A (en) * | 2011-02-22 | 2011-09-07 | 深圳市理邦精密仪器股份有限公司 | Power frequency digital notch device and method based on frequency track |
| CN102769478A (en) * | 2012-08-02 | 2012-11-07 | 江苏物联网研究发展中心 | Self-adaption rapid narrow-band interference suppression device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4968689B2 (en) * | 2008-03-12 | 2012-07-04 | 東芝エレベータ株式会社 | Elevator leakage current reduction device |
-
2014
- 2014-09-28 CN CN201410509057.4A patent/CN104319988B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176667A (en) * | 2011-02-22 | 2011-09-07 | 深圳市理邦精密仪器股份有限公司 | Power frequency digital notch device and method based on frequency track |
| CN102769478A (en) * | 2012-08-02 | 2012-11-07 | 江苏物联网研究发展中心 | Self-adaption rapid narrow-band interference suppression device |
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| Publication number | Publication date |
|---|---|
| CN104319988A (en) | 2015-01-28 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Du Tao Inventor before: Zhan Shijie Inventor before: Zhou Yiguang |
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| TR01 | Transfer of patent right |
Effective date of registration: 20171221 Address after: Room 1403, block A, block A, No. 9, Hongfeng Road, Hefei high tech Zone, Hefei City, Anhui Patentee after: Du Tao Address before: 241000 Zhongshan South Road No. 717 (Service Outsourcing Industrial Park) in Wuhu high and New Development Zone, Anhui Patentee before: ANHUI ZHONGKE MEDICAL IMAGING TECHNOLOGY CO., LTD. |
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| TR01 | Transfer of patent right | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Jinghu District of Anhui city of Wuhu province Daguanshan 241000 No. 59 1 Patentee after: Du Tao Address before: Room 1403, block A, block A, No. 9, Hongfeng Road, Hefei high tech Zone, Hefei City, Anhui Patentee before: Du Tao |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 241000 Zhongshan South Road No. 717 (Service Outsourcing Industrial Park) in Wuhu high and New Development Zone, Anhui Patentee after: Du Tao Address before: Jinghu District of Anhui city of Wuhu province Daguanshan 241000 No. 59 1 Patentee before: Du Tao |
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Effective date of registration: 20191202 Address after: 233010 No.2, third floor, No.319, zhanggongshan Road, zhanggongshan street, Yuhui District, Bengbu City, Anhui Province Patentee after: Bengbu aochuang Intellectual Property Operation Co., Ltd Address before: 241000, No. 717 Zhongshan South Road, Wuhu hi tech Development Zone, Anhui province (Service Outsourcing Industry Park) Patentee before: Du Tao |
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Effective date of registration: 20201110 Address after: 274100 in Antong Logistics Institute, economic development zone, Dingtao District, Heze City, Shandong Province Patentee after: Shandong Ba Ling special cable Co.,Ltd. Address before: 233010 No.2, third floor, No.319, zhanggongshan Road, zhanggongshan street, Yuhui District, Bengbu City, Anhui Province Patentee before: Bengbu aochuang Intellectual Property Operation Co.,Ltd. |