CN106982080A - A kind of electric line carrier communication circuit system - Google Patents
A kind of electric line carrier communication circuit system Download PDFInfo
- Publication number
- CN106982080A CN106982080A CN201710262037.5A CN201710262037A CN106982080A CN 106982080 A CN106982080 A CN 106982080A CN 201710262037 A CN201710262037 A CN 201710262037A CN 106982080 A CN106982080 A CN 106982080A
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- pins
- line
- electric capacity
- diode
- carrier communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention provides a kind of electric line carrier communication circuit system, it is intended to solve signal absorption and bursty interference greatly reduces the adaptability and reliability of narrowband carrier communication system.A kind of electric line carrier communication circuit system, including ST7538 carrier chips, ST7538 carrier chips are provided with RA1 pins, ATOP1 pins and ATOP2 pins；ATOP1 pins and ATOP2 pins are connected with power line；A transmitting filter, coupling protection circuit, transformer and No. two bandpass filters are disposed with power line；Reception bandpass filter is connected between a number transmitting filter and RA1 pins.The present invention is filtered processing to signal, filters out certain noise such as second harmonic, and make signal have enough power to be coupled on power line by power amplifier when sending signal；When receiving, the noise mixed in the signal is filtered out, and amplified signal, then pass the signal to and be demodulated in modulation /demodulation module.
Description
Technical field
The present invention relates to communication field, more particularly to a kind of electric line carrier communication circuit system.
Background technology
Electric line carrier communication refers to utilize existing power line, is carried out analog or digital signal at a high speed by carrier system
The technology of transmission.Because electric line carrier communication has, information transfer is reliable and stable, route is reasonable, can concurrent multiplexing telemechanical letter
Number, the features such as do not need track investment, electric line carrier communication technology is just gradually applied to each as emerging mechanics of communication
Field.At present, PLC communication module mainly connects including central control circuit (MCU), synchronization signal processing circuit, signal
Receive circuit, signal transmission circuit, external interface circuit, the power circuit for providing power supply for foregoing circuit；Center control electricity
Road has the functions such as modulation, demodulation, when in use, and central control circuit can obtain power line by signal receiving circuit loading
On data-signal, can by signal transmission circuit by need transmit data-signal be loaded on power line, can pass through
The external equipments such as external interface circuit and control main frame, electric equipment or external control circuit carry out data exchange and corresponding controlled
System；And synchronization signal processing circuit is used to synchronizing signal inputting central control circuit.Spread spectrum communication (SSC) technology is used at present
PLC be commonly referred to as arrowband PLC.Become increasingly abundant in electrical equipment type, the electricity such as Switching Power Supply and reactive power compensator in circuit
Under the increasing environment of capacitive load, signal absorption and bursty interference greatly reduce the adaptability of narrowband carrier communication system
And reliability.
The content of the invention
The invention provides a kind of electric line carrier communication circuit system, it is intended to solves increasingly rich in electrical equipment type
In richness, circuit under the increasing environment of the capacity load such as Switching Power Supply and reactive power compensator, signal absorption and burst are dry
Disturb the adaptability and reliability for greatly reducing narrowband carrier communication system.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions：
A kind of electric line carrier communication circuit system, including ST7538 carrier chips, ST7538 carrier chips are provided with RA1
Pin, ATOP1 pins and ATOP2 pins；ATOP1 pins and ATOP2 pins are connected with power line；It is disposed with power line
Number transmitting filter, coupling protection circuit, transformer and No. two bandpass filters；Number transmitting filter with
Reception bandpass filter is connected between RA1 pins.
Further, a transmitting filter includes electric capacity C13, inductance LC12, electric capacity CR9 and resistance R10；The electricity
Hold C13 to be arranged on the power line being connected with ATOP1 pins, inductance LC12 is connected on the power line being connected with ATOP2 pins,
Electric capacity CR9 and resistance R10 connect and are connected between two power lines.
Further, reception bandpass filter includes connecting line, resistance R11, inductance L7 and electric capacity C36, and connecting line one end connects
It is connected on RA1 pins and the other end is connected between electric capacity CR9 and resistance R10, resistance R11 is connected on connecting line, inductance L7
It is connected with electric capacity C36 one end with connecting line and the other end is grounded.
Further, electric capacity C33 is additionally provided between reception bandpass filter and RA1 pins.
Further, diode D15, the diode D16 of coupling protection circuit including back-to-back setting and diode D17, two
Pole pipe D15 and diode D16 are connected between two power lines and constitute a bi-directional voltage stabilizing pipe, the connection of diode D17 one end
Between diode D15 and diode D16 and the other end be grounded.
Further, No. two bandpass filters include connecting the electric capacity C11 and inductance L4 on a power line wherein.
Compared with prior art it is an advantage of the invention that：
The present invention is filtered processing to signal, filters out certain noise such as second harmonic, and pass through when sending signal
Power amplifier makes signal have enough power to be coupled on power line；When receiving, the noise mixed in the signal is carried out
Filter out, and amplified signal, then pass the signal to and be demodulated in modulation /demodulation module.Solve in electrical equipment type day
Benefit is abundant, in circuit under the increasing environment of the capacity load such as Switching Power Supply and reactive power compensator, signal absorption and prominent
Hair shaft disturbs the adaptability and reliability for greatly reducing narrowband carrier communication system.Power amplification circuit is carried inside ST7538,
Reception need to only be designed, sent and three parts of protection.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not to be taken as to model
The restriction enclosed, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other related accompanying drawings.
Fig. 1 is structural representation of the invention.
Embodiment
In the description of the invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ",
Terms such as " fixations " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be with
It is mechanical connection or electrical connection；Can be directly connected to or be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals or the interaction relationship of two elements.For those of ordinary skills, Ke Yigen
Understand the concrete meaning of above-mentioned term in the present invention according to concrete condition.
Refering to Fig. 1, a kind of electric line carrier communication circuit system, including ST7538 carrier chips, ST7538 carrier chips
It is provided with RA1 pins, ATOP1 pins and ATOP2 pins；ATOP1 pins and ATOP2 pins are connected with power line；On power line
It is disposed with a transmitting filter, coupling protection circuit, transformer and No. two bandpass filters；A number transmission band logical
Reception bandpass filter is connected between wave filter and RA1 pins.
A number transmitting filter includes electric capacity C13, inductance LC12, electric capacity CR9 and resistance R10；The electric capacity C13 is set
Put on the power line being connected with ATOP1 pins, inductance LC12 is connected on the power line being connected with ATOP2 pins, electric capacity CR9
And resistance R10 connects and is connected between two power lines.Reception bandpass filter include connecting line, resistance R11, inductance L7 and
Electric capacity C36, connecting line one end is connected on RA1 pins and the other end is connected between electric capacity CR9 and resistance R10, and resistance R11 connects
It is connected on connecting line, inductance L7 and electric capacity C36 one end are connected and other end ground connection with connecting line.Reception bandpass filter and RA1
Electric capacity C33 is additionally provided between pin.
Coupling protection circuit includes diode D15, diode D16 and the diode D17 of back-to-back setting, diode D15
And diode D16 is connected between two power lines and constitutes a bi-directional voltage stabilizing pipe, diode D17 one end is connected to diode
Between D15 and diode D16 and the other end be grounded.
No. two bandpass filters include connecting the electric capacity C11 and inductance L4 on a power line wherein.
ST7538 carrier chips are a half-duplexs designed for family and industrial circle powerline network communication, same
Step/asynchronous, FSK modulation demodulator chip, with the features such as powerful, integrated level is high, Anti-Jamming Technique is more, is carried in electric power
Compare in wave communication and be widely applied.RA1 pins are used to receive the simulation letter come from power line, ATOP1 pins and ATOP2
Pin carries out the signal after modulation to export after power amplification.
In the present embodiment, electric capacity C11, inductance LC12, inductance L4 and equivalent emotional resistance LC value are usually given in advance
, it is necessary to by calculate it is confirmed that electric capacity C13 and CR9 value.Again it is noted that transformation when selected C11, LC12, L4 and LC value
The equivalent series resistance ESR of the leakage inductance of device, the electric capacity of crystal diode and Tandem devices (C13, LC12, T1, L4, C11)
(100m Ω~1 Ω), so selecting resistive device as much as possible.Transformer Selection 1:1 isolating transformer.Simulate power line
Impedance conditions, i.e. the output end to wave filter is plus inductive load, and it is 2LC=100 μ H to make its impedance operator.In circuit
Perceptual device ESR it is proportional to its inductance value, and the ESR of perceptual device is small as much as possible.Inductance is (big from LBC
Bobbin bobbin core), inductance value is as small as possible, so the value that LC12 value elects 10 μ H, L4 as elects 22 μ H as.C11 effect is
Transformer is isolated with power line, the signal of the 50/60Hz on filtering power line prevents low frequency signal from entering circuit and make some
High-frequency signal passes through, and chooses X2 type electric capacity, this electric capacity has short-circuit protection function, so C11 value is typically chosen as 33nF/
400V.According to pole frequency formula, the value for calculating C13 is 220nF, and CR9 value is 100nF.Receiving circuit part is selected
Passive filter is better than active filter, because active filter can produce a white noise suitable with receiving signal
Sound.Using antiresonant circuit, from second order passive bandpass filters (C36, L7, R11).The frequency of receiving filter it is main by
Electric capacity C36, inductance L7 and resistance R11 value are determined.Centre frequency may be configured as 132.5kHz.One of performance of filter quality
Key factor is quality factor q, and Q values elect 2~3 as.The polypropylene capactive and allowable error for being 5% from allowable error are 10%
BC (bobbin tape wound core) inductance.In order to not influence transmitting portion, and reduction is by the DC current of transformer,
R11 value will as far as possible greatly, if but R11 values are excessive, a higher white noise can be produced, so R11 value is taken as 750
Ω.Make R11 value constant, different C36 and L7 value can be drawn according to centre frequency is different with the selection of quality factor.
In protection circuit part, general using a bi-directional voltage stabilizing pipe, when magnitude of voltage is not less than voltage stabilizing tube voltage, voltage-stabiliser tube will be short
Ground is connected to, so that the device of protection interface circuit will not be burned.Interference between live wire and zero line is DM EMI, live wire and ground
Line, between zero line and ground wire for common mode disturbances.Using a bi-directional voltage stabilizing pipe only differential mode spiking is worked and to common mode
Spiking does not have effect, and circuit will be caused when there is common mode spiking to damage, so here using three diodes
They are linked to be star topology by (D16 and D15 are P6KE6V8, and D17 is SM6T6V8A).For differential mode spiking, D16 and
D15 constitutes a bi-directional voltage stabilizing pipe, and for common mode spiking, this star topology is equivalent to two bi-directional voltage stabilizing pipe (D15
And D17, D16 and D17).
The specific embodiment of the present invention is the foregoing is only, but the technical characteristic of the present invention is not limited thereto, Ren Heben
The technical staff in field is in the field of the invention, and the change or modification made all are covered among the scope of the claims of the present invention.
Claims (6)
1. a kind of electric line carrier communication circuit system, it is characterized in that：Including ST7538 carrier chips, on ST7538 carrier chips
Provided with RA1 pins, ATOP1 pins and ATOP2 pins；ATOP1 pins and ATOP2 pins are connected with power line；On power line according to
It is secondary to be provided with a transmitting filter, coupling protection circuit, transformer and No. two bandpass filters；No. one sends band logical filter
Reception bandpass filter is connected between ripple device and RA1 pins.
2. a kind of electric line carrier communication circuit system according to claim 1, it is characterized in that：A number transmission bandpass filtering
Device includes electric capacity C13, inductance LC12, electric capacity CR9 and resistance R10；The electric capacity C13 is arranged on the electricity being connected with ATOP1 pins
In the line of force, inductance LC12 is connected on the power line being connected with ATOP2 pins, and electric capacity CR9 and resistance R10 connect and be connected to two
Between root power line.
3. a kind of electric line carrier communication circuit system according to claim 2, it is characterized in that：Reception bandpass filter bag
Connecting line, resistance R11, inductance L7 and electric capacity C36 are included, connecting line one end is connected on RA1 pins and the other end is connected to electric capacity
Between CR9 and resistance R10, resistance R11 is connected on connecting line, and inductance L7 and electric capacity C36 one end are connected and another with connecting line
End ground connection.
4. a kind of electric line carrier communication circuit system according to claim 3, it is characterized in that：Reception bandpass filter with
Electric capacity C33 is additionally provided between RA1 pins.
5. a kind of electric line carrier communication circuit system according to claim 1, it is characterized in that：Coupling protection circuit includes
Diode D15, diode D16 and the diode D17 of back-to-back setting, diode D15 and diode D16 are connected to two electric power
Between line and constitute a bi-directional voltage stabilizing pipe, diode D17 one end is connected between diode D15 and diode D16 and another
End ground connection.
6. a kind of electric line carrier communication circuit system according to claim 1, it is characterized in that：No. two bandpass filter bags
Include the electric capacity C11 and inductance L4 connected on a power line wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710262037.5A CN106982080A (en) | 2017-04-20 | 2017-04-20 | A kind of electric line carrier communication circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710262037.5A CN106982080A (en) | 2017-04-20 | 2017-04-20 | A kind of electric line carrier communication circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106982080A true CN106982080A (en) | 2017-07-25 |
Family
ID=59345728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710262037.5A Pending CN106982080A (en) | 2017-04-20 | 2017-04-20 | A kind of electric line carrier communication circuit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106982080A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367101A (en) * | 2020-12-09 | 2021-02-12 | 核工业理化工程研究院 | Analog front-end circuit suitable for narrow-band power line communication |
-
2017
- 2017-04-20 CN CN201710262037.5A patent/CN106982080A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367101A (en) * | 2020-12-09 | 2021-02-12 | 核工业理化工程研究院 | Analog front-end circuit suitable for narrow-band power line communication |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170725 |
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| WD01 | Invention patent application deemed withdrawn after publication |