CN106814372A - A kind of Big Dipper navy receiver electromagnetic compatibility circuit - Google Patents
A kind of Big Dipper navy receiver electromagnetic compatibility circuit Download PDFInfo
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- CN106814372A CN106814372A CN201510865263.3A CN201510865263A CN106814372A CN 106814372 A CN106814372 A CN 106814372A CN 201510865263 A CN201510865263 A CN 201510865263A CN 106814372 A CN106814372 A CN 106814372A
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- receiver
- navy
- big dipper
- electromagnetic compatibility
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Noise Elimination (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A kind of Big Dipper navy receiver electromagnetic compatibility circuit, the main anti-electromagnetic interference capability that receiver is improved using exterior shield and internal shield measure.Circuit uses modular design, the coupled interference for favorably directly being formed with wire in reduction printed circuit board.The circuit structure is more compact, and safe and reliable, adaptability is good, have the advantages that it is low in energy consumption, cost-effective, easy to use, with larger market promotion prospect.
Description
Technical field
The present invention relates to a kind of Big Dipper navy receiver electromagnetic compatibility circuit, it is adaptable to electronic applications.
Background technology
Shipping industry has obtained fast development with the growth of national economy, not only turn into the important component of communications and transportation, also become the key factor for driving economic development, ship also towards maximization, automation direction developing, generate the problem that therewith the safety of Shipping with it is efficient.Water traffic safety insurance is the national public welfare field for being related to people life property safety, and Satellite Navigation Technique is important support technology.With the commencement of commercial operation of China's Beidou II satellite navigation system, the research of Big Dipper navy receiver is also just in carrying out like a raging fire.And in ship electronic equipment research and development process is carried out, a problem that can not ignore is Electro Magnetic Compatibility (EMC) problem of electronic equipment.
In recent years, with the fast development of shipbuilding industry and electronics industry, the various electric, electronic equipments equipped in modern ships are also more and more, and increasingly develop towards the intelligent direction for complicating.Printed circuit board (PrIntedCireuitBoard, PCB the space residing for) is relatively narrow and small so that these equipment cause electromagnetic interference mouthful each other, and this interference can not only influence the performance that equipment is run, failure can be also caused when situation is serious, caused the accident.So, the research that making the electronic communication navigation equipment being arranged on ship has excellent Electro Magnetic Compatibility and interference free performance is just particularly important in the whole development process of equipment.
The content of the invention
The present invention proposes a kind of Big Dipper navy receiver electromagnetic compatibility circuit, and the circuit structure is more compact, and safe and reliable, adaptability is good, have the advantages that it is low in energy consumption, cost-effective, easy to use, with larger market promotion prospect.
The technical solution adopted in the present invention is：The circuit mainly improves the anti-electromagnetic interference capability of receiver using exterior shield and internal shield measure.Radio-frequency front-end receives the radiofrequency signal of satellite, in the entire system by the position that electromagnetic interference influence is most prominent, the measure of exterior shield is taken in the design；Circuit uses modular design, the coupled interference for favorably directly being formed with wire in reduction printed circuit board.
In the RF front-end circuit, receiver depends on the RF signals of outside, thus is highly susceptible to RF interference effects.Because the GNSS signal of antenna all satellites within sweep of the eye is below thermal noise level, if not considering influence of the RF interference to receiver hardware in design, receiver front end (simulation) hardware needs the dynamic range of sizable gain and very little.It is critically important that receiver front end hardware has certain dynamic range, and this front-end gain that will allow for being caused by component tolerance, aging and temperature change changes.Radio-frequency front-end is the position that Big Dipper navy receiver is most easily influenceed by electromagnetic pulse, in order to reduce or limiting the electromagnetic pulse energy for being coupled to receiver system, the methods such as coupling, the quantity of internal system of limitation coupling energy transmission of limitation antenna can be taken in radio-frequency front-end.This method can take various forms of wave filters and limiter to realize, modularized design is taken herein, and wave filter and limiter are encapsulated in metal-back.So as to significantly reduce the interference that radio-frequency front-end brings to receiver.
In the interface circuit, because receiver is using high input impedance and sends the driver driving force more stronger than RS-232, allow to connect multiple receiving nodes on the same transmission line, so RS-422 supports point-to-points two-way communication, using full-duplex communication pattern, strong antijamming capability, can provide real-time Beidou navigation location information to navigation equipments such as ECDIS and radars.
In the power port circuit, the power supply disturbance that the change (such as over-pressed, under-voltage, surge and transient voltage etc.) of voltage, sustained sound or clutter and transition are formed on ship, mainly by power end mouth line successor's receiver terminal, its normal work is disturbed.Therefore, the AF panel of power port turns into the emphasis of EMC Design.Power supply use+the 5V of Beidou satellite navigation navy receiver terminal powers, and prime is concatenated at power port and suppresses interference filter.
The beneficial effects of the invention are as follows：Circuit structure is more compact, and safe and reliable, adaptability is good, have the advantages that it is low in energy consumption, cost-effective, easy to use, with larger market promotion prospect.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is circuit system theory diagram of the invention.
Fig. 2 is RF front-end circuit figure of the invention.
Fig. 3 is RS-422 interface circuit figures of the invention.
Fig. 4 is port power circuit diagram of the invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, circuit mainly improves the anti-electromagnetic interference capability of receiver using exterior shield and internal shield measure.Radio-frequency front-end receives the radiofrequency signal of satellite, in the entire system by the position that electromagnetic interference influence is most prominent, the measure of exterior shield is taken in the design；Circuit uses modular design, the coupled interference for favorably directly being formed with wire in reduction printed circuit board.
Electromagnetic compatibility（EMC）Generally refer to electrically and electronic equipment can perform the coexisting state of respective function in common electromagnetic environment, that is, require that each equipment in same electromagnetic environment normal work and can not interfered with each other, reach the state of " compatibility ".That is EMC includes both sides implication：First, each element of electronic equipment or internal system, part and subsystem in the inside and outside electromagnetic environment residing for them, can normally be run by former design requirement.Second, the electromagnetic noise that the equipment or system oneself are produced must be limited in certain level, do not caused harsh electromagnetic to pollute and influenceed the normal operation of other equipment or system.Electromagnetic compatibility include above two aspects be directed to electromagnetic environment this concept, actually electromagnetic environment is made up of space, 3 key elements of time and frequency spectrum, the electromagnetic compatibility problem of solution in need all take off and be unable to do without this 3 key elements.Therefore, the antijamming capability of the emittance of control electromagnetic interference source, the coupling channel of cut-out electromagnetic interference, the disturbed equipment of raising or system is the main contents of electromagnetic compatibility Journal of Sex Research.
In order that the Big Dipper boat-carrying receiver terminal system stabilization of design, reliable work, and consider that EMC designs are very necessary when being designed with stronger antijamming capability comprehensively.The product E MC experiments otherwise designed can't pass, and not only influence the safety and reliability of product, and redesign construction cycle and the cost that also increase system, so as to bring many unfavorable problems.EMC designs used suppression component and the brought fringe cost minimum of redesign；Ensure that product being capable of normal work when there is inevitable external noise in its use environment.It can be said that EMC designs are important as the technology or functional design of whole system.
Such as Fig. 2, in RF front-end circuit, receiver depends on the RF signals of outside, thus is highly susceptible to RF interference effects.Because the GNSS signal of antenna all satellites within sweep of the eye is below thermal noise level, if not considering influence of the RF interference to receiver hardware, receiver front end in design（Simulation）Hardware needs the dynamic range of sizable gain and very little.It is critically important that receiver front end hardware has certain dynamic range, and this front-end gain that will allow for being caused by component tolerance, aging and temperature change changes.Radio-frequency front-end is the position that Big Dipper navy receiver is most easily influenceed by electromagnetic pulse, in order to reduce or limiting the electromagnetic pulse energy for being coupled to receiver system, the methods such as coupling, the quantity of internal system of limitation coupling energy transmission of limitation antenna can be taken in radio-frequency front-end.This method can take various forms of wave filters and limiter to realize, modularized design is taken herein, and wave filter and limiter are encapsulated in metal-back.So as to significantly reduce the interference that radio-frequency front-end brings to receiver.
Such as Fig. 3, in interface circuit, because receiver is using high input impedance and sends the driver driving force more stronger than RS-232, allow to connect multiple receiving nodes on the same transmission line, so RS-422 supports point-to-points two-way communication, using full-duplex communication pattern, strong antijamming capability can provide real-time Beidou navigation location information to navigation equipments such as ECDIS and radars.
Such as Fig. 4, in power port circuit, the power supply disturbance that the change (such as over-pressed, under-voltage, surge and transient voltage etc.) of voltage, sustained sound or clutter and transition are formed on ship, is mainly passed on a skill of craft to others receiver terminal by power end mouth line, disturbs its normal work.Therefore, the AF panel of power port turns into the emphasis of EMC Design.Power supply use+the 5V of Beidou satellite navigation navy receiver terminal powers, and prime is concatenated at power port and suppresses interference filter.
Interference protection measure more than, the DC3.3V of output just compares clean, is followed by regulator block etc. to power electronics.The circuit meets the requirement of the standards such as IEC61000-4-2, IEC61000-4-3, IEC61000-4-4, IEC61000-4-5, and by immunity experiment.
Claims (6)
1. a kind of Big Dipper navy receiver electromagnetic compatibility circuit, it is characterized in that：The circuit mainly improves the anti-electromagnetic interference capability of receiver using exterior shield and internal shield measure.
2. a kind of Big Dipper navy receiver electromagnetic compatibility circuit according to claim 1, it is characterized in that：The radio-frequency front-end receives the radiofrequency signal of satellite, in the entire system by the position that electromagnetic interference influence is most prominent, the measure of exterior shield is taken in the design；Circuit uses modular design, the coupled interference for favorably directly being formed with wire in reduction printed circuit board.
3. a kind of Big Dipper navy receiver electromagnetic compatibility circuit according to claim 1, it is characterized in that：It is critically important that receiver front end hardware has certain dynamic range, and this front-end gain that will allow for being caused by component tolerance, aging and temperature change changes.
4. a kind of Big Dipper navy receiver electromagnetic compatibility circuit according to claim 1, it is characterized in that：In order to reduce or limiting the electromagnetic pulse energy for being coupled to receiver system, the methods such as coupling, the quantity of internal system of limitation coupling energy transmission of limitation antenna can be taken in radio-frequency front-end.
5. a kind of Big Dipper navy receiver electromagnetic compatibility circuit according to claim 1, it is characterized in that：In the interface circuit, because receiver is using high input impedance and sends the driver driving force more stronger than RS-232, allow to connect multiple receiving nodes on the same transmission line, so RS-422 supports point-to-points two-way communication, using full-duplex communication pattern, strong antijamming capability, can provide real-time Beidou navigation location information to navigation equipments such as ECDIS and radars.
6. a kind of Big Dipper navy receiver electromagnetic compatibility circuit according to claim 1, it is characterized in that：In the power port circuit, the change of voltage on ship（Such as over-pressed, under-voltage, surge and transient voltage）, the power supply disturbance that is formed of sustained sound or clutter and transition, mainly passed on a skill of craft to others receiver terminal by power end mouth line, disturb its normal work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865263.3A CN106814372A (en) | 2015-12-01 | 2015-12-01 | A kind of Big Dipper navy receiver electromagnetic compatibility circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865263.3A CN106814372A (en) | 2015-12-01 | 2015-12-01 | A kind of Big Dipper navy receiver electromagnetic compatibility circuit |
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| CN106814372A true CN106814372A (en) | 2017-06-09 |
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| CN201510865263.3A Pending CN106814372A (en) | 2015-12-01 | 2015-12-01 | A kind of Big Dipper navy receiver electromagnetic compatibility circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107484326A (en) * | 2017-08-11 | 2017-12-15 | 南京长峰航天电子科技有限公司 | A kind of radio-frequency module EMC design |
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2015
- 2015-12-01 CN CN201510865263.3A patent/CN106814372A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107484326A (en) * | 2017-08-11 | 2017-12-15 | 南京长峰航天电子科技有限公司 | A kind of radio-frequency module EMC design |
| CN107484326B (en) * | 2017-08-11 | 2019-07-30 | 南京长峰航天电子科技有限公司 | A kind of radio-frequency module EMC design |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |
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| WD01 | Invention patent application deemed withdrawn after publication |