CN104092480B - Power line signal attenuation degree adjusting system - Google Patents
Power line signal attenuation degree adjusting system Download PDFInfo
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- CN104092480B CN104092480B CN201410158090.7A CN201410158090A CN104092480B CN 104092480 B CN104092480 B CN 104092480B CN 201410158090 A CN201410158090 A CN 201410158090A CN 104092480 B CN104092480 B CN 104092480B
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Abstract
The invention discloses a power line signal attenuation degree adjusting system and belongs to the technical field of power line carrier communication. The system includes a signal sending unit used for outputting power line signals; a first signal isolation unit connected with the sending unit and used for isolating power frequency signals in the power line signals; a second signal isolation unit which is connected with the first signal isolation unit and used for isolating the power frequency signals in the power line signals, wherein the first signal isolation unit and the second signal isolation unit are mirror images of each other; a signal attenuation unit which is connected between the first signal isolation unit and the second signal isolation unit and capable of controlling the attenuation degree of the power line signals through adjustment of a signal obstruction quantity of the signal attenuation unit; and a signal receiving unit which is connected with the second signal isolation unit and used for receiving the power line signals which undergo attenuation adjustment. The beneficial effects of the technical scheme are that the power frequency signals and carrier signals are distinguished effectively and flat attenuation and stepless automatic adjustment of the carrier signals are realized and thus personal security of operation personnel is ensured.
Description
Technical field
The present invention relates to power-line carrier communication field, particularly relate to a kind of power line signal dough softening
Regulation system.
Background technology
In carrier communication field, in order to definite understanding each scheme reaches in electric lines of force signal attenuation of being taken in
During which kind of degree, communicate the most unsuccessful, and in the case of signal conflict, it is to be appreciated that wherein one
Individual signal can proper communication higher than another signal how many times.Each producer in power line carrier field at present
Being used most of attenuation schemes is that (L is inductance, and C is for the simple LCR circuit that uses as shown in Figure 1
Electric capacity, R is resistance), this circuit is the model gone out given in electrically-based line carrier test specification, then
According to respective communication frequency, the parameter of circuit is adjusted.The model of this structure is no doubt simple, and zero
Device is less, and parameter easily calculates, but applies this model to carry out the signal attenuation test of carrier communication,
There will be following problem:
First, the purpose of design electric lines of force attenuator is to test carrier communication module at real power line
On performance, very prominent factor is in addition to outside signal decayed, the noise on electric lines of force
The zero-decrement existence of signal demand, and the harmonic signal of self decay of degree such as also to obtain,
Communication performance can be tested faithfully.And this model of Fig. 1 structure, its frequency response curve is similar to low
Bandpass filter, can obtain required decay on signal frequency point, but other uncorrelated signal can obtain
To decay in various degree, the particularly harmonic wave of its own signal will be attenuated significantly, and this is and survey
Examination purpose is inconsistent.It addition, general carrier communication scheme, signal all can have necessarily on frequency domain
Bandwidth, and use this model, will make outside frequency elimination point, other signal in band is also attenuated.
In the case of the degree needing decay is the biggest, owing to the high band of frequency response curve becomes more precipitous,
The problems referred to above will show more for prominent (as shown in Figure 2).And from figure 3, it can be seen that its phase frequency
Change is also bigger, and phase margin drastically declines.
It addition, in conventional model, by calculating and emulation is it is known that the adjustable extent of signal attenuation
Less, if needing to realize bigger decay, then necessary plural serial stage, attenuation amplitude will be discontinuity.
Current most model is all with being manually adjusted attenuation, owing to above-mentioned model is commonly used to
The forceful electric power of 220v even 380v, manually regulation is the most unsafe.
Chinese patent (CN203104460U) discloses a kind of power line carrier communication emulation test system,
Including power conditioner, power line carrier meter reading system, noise simulator, load simulator and adjustable signal
Attenuator, power conditioner is used for powering for power line carrier meter reading system, noise simulator, load simulation
Device and adjustable signal attenuator access power line carrier meter reading system, are used for as power line carrier meter reading system
Set specific field simulation scene.Imitating when technique scheme relate to whole power line carrier communication
True test process, does not specifically describe circuit structure during test carrier signal decay, therefore cannot solve
Certainly problems of the prior art.
Summary of the invention
According to problems of the prior art, existing offer a kind of power line signal dough softening regulation system,
Specifically include:
A kind of power line signal dough softening regulation system, wherein, including:
Signal transmitting unit, for output power line signal；
First signal isolated location, connects described transmitting element, for isolating in described power line signal
Power frequency component；
Secondary signal isolated location, connects described first signal isolated location, is used for isolating described electric lines of force
Power frequency component in signal；
Described first signal isolated location and described secondary signal isolated location mirror image each other；
Signal attenuation unit, accesses described in described first signal isolated location between secondary signal isolated location,
The dough softening of described power line signal is controlled by the signal obstruction amount regulating self；
Signal receiving unit, connects described secondary signal isolated location, for receiving after overdamping adjusts
Described power line signal.
Preferably, this power line signal dough softening regulation system, wherein, described first signal isolated location
Including:
First electric capacity, is connected on described live wire, and connects described signal transmitting unit and described letter respectively
Number attenuation units, is used for blocking described power frequency component；
First resistance, is connected between described first electric capacity and described signal attenuation unit, as described
The load of one electric capacity；
First balance module, for balancing the signal obstruction amount of described first signal isolated location both sides.
Preferably, this power line signal dough softening regulation system, wherein, described first balance module includes:
Second electric capacity, is connected between described live wire and described zero line, and it is single to connect the transmission of described signal
Unit, and with described first electric capacity and described first resistor coupled in parallel；
Second resistance, is connected between described second electric capacity and described zero line.
Preferably, this power line signal dough softening regulation system, wherein, described secondary signal isolated location
Including:
3rd electric capacity, is connected on described live wire, and connects described signal transmitting unit and described letter respectively
Number attenuation units, is used for blocking described power frequency component；
3rd resistance, is connected between described 3rd electric capacity and described signal attenuation unit；
Second balance module, for balancing the signal obstruction amount of described secondary signal isolated location both sides.
Preferably, this power line signal dough softening regulation system, wherein, described second balance module includes:
4th electric capacity, is connected between described live wire and described zero line, and it is single to connect the reception of described signal
Unit, and with described 3rd electric capacity and described 3rd resistor coupled in parallel；
4th resistance, is connected between described 4th electric capacity and described zero line.
Preferably, this power line signal dough softening regulation system, wherein, described first signal isolated location
Also include:
5th electric capacity, is connected on described zero line, and connects described signal transmitting unit and described letter respectively
Number attenuation units, is used for blocking described power frequency component；
Described 5th electric capacity and described first electric capacity mirror image each other；
5th resistance, is connected between described 5th electric capacity and described signal attenuation unit, as described
The load of five electric capacity；
Described 5th resistance and described first resistance mirror image each other.
Preferably, this power line signal dough softening regulation system, wherein, described second isolated location also wraps
Include:
6th electric capacity, is connected on described zero line, and connects described signal transmitting unit and described letter respectively
Number attenuation units, is used for blocking described power frequency component；
Described 6th electric capacity and described 3rd electric capacity mirror image each other；
6th resistance, is connected between described 6th electric capacity and described signal attenuation unit；
Described 6th resistance and described 3rd resistance mirror image each other.
Preferably, this power line signal dough softening regulation system, wherein, also include:
First signal transmission unit, connects described signal transmitting unit and described signal receiving unit respectively,
The described power frequency component blocked by described first signal isolated location for transmission.
Preferably, this power line signal dough softening regulation system, wherein, described first signal transmission unit
Being an inductance, the two ends of described inductance are both connected on described live wire.
Preferably, this power line signal dough softening regulation system, wherein, also include:
Secondary signal transmission unit, connects described signal respectively and starts unit and described signal receiving unit,
The described power frequency component blocked by described first signal isolated location for transmission；
Described secondary signal transmission unit and described first signal transmission unit mirror image each other.
Preferably, this power line signal dough softening regulation system, wherein, described secondary signal transmission unit
Being an inductance, the two ends of described inductance are both connected on described zero line.
Preferably, this power line signal dough softening regulation system, wherein,
Preferably, this power line signal dough softening regulation system, wherein, described signal attenuation unit includes:
Rheostat, is connected between described live wire and described zero line, and described rheostat connects described live wire
One end is accessed between described first signal isolated location and described secondary signal isolated location；
Preferably, this power line signal dough softening regulation system, wherein, also include:
Adjustable attenuation unit, connects described signal attenuation unit；
Described adjustable attenuation unit farther includes:
Monitoring modular, for monitoring the current location of described rheostatic variable resistance contact；
Processing module, connects described monitoring modular by a communication module, for according to described monitoring modular
Monitoring result, and the operational order process of outside input forms a corresponding regulating command and exports；
Drive module, connect described processing module by described communication module, be used for receiving described regulation and refer to
Order, and according to described regulating command, described variable resistance contact is moved to relevant position.
Preferably, this power line signal dough softening regulation system, wherein, described driving module includes:
Motor component, is used for controlling described variable resistance contact and moves；
Motor driving part part, connects described motor component, for driving described electricity according to described regulating command
Machine operates.
Technique scheme provides the benefit that:
1) power frequency component and carrier signal are effectively distinguished, it is achieved smooth in broad frequency band of carrier signal
Decay；
2) rheostat is used to realize the step-less adjustment of the carrier signal dough softening；
3) symmetrical structure is used, it is to avoid the feelings that signal attenuation is not inconsistent with imagination occur under unsymmetric structure
Condition；
4) use external digital to control device attenuator circuit is controlled, reduce the requirement of operator,
Ensure the personal safety of operator simultaneously.
Accompanying drawing explanation
Fig. 1 is signal attenuation circuit schematic diagram of the prior art；
Fig. 2 is signal attenuation model amplitude-frequency response figure of the prior art；
Fig. 3 is signal attenuation model phase-frequency response figure of the prior art；
Fig. 4 is in the preferred embodiment of the present invention, the structure of a kind of power line signal Attenuation adjustable system
Schematic diagram；
Fig. 5 is in the preferred embodiment of the present invention, the circuit of a kind of power line signal Attenuation adjustable system
Schematic diagram；
Fig. 6 is in the preferred embodiment of the present invention, the amplitude-frequency of power application wire signal attenuation regulation system
Response diagram；
Fig. 7 is in the preferred embodiment of the present invention, the phase frequency of power application wire signal attenuation regulation system
Response diagram.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
As shown in Figure 4, in the preferred embodiment of the present invention, a kind of power line signal Attenuation adjustable system,
Specifically include:
Signal transmitting unit 1.In the preferred embodiment of the present invention, signal transmitting unit 1 is as whole
The transmitting terminal of system sends the power line signal required for carrier communication, carries out attenuation processing for system.
Signal receiving unit 5.In the preferred embodiment of the present invention, signal receiving unit 5 is as whole
The receiving terminal of system, for receiving the power line signal processed through system attenuation.
Further, in the preferred embodiment of the present invention, above-mentioned power line signal Attenuation adjustable system bag
Include:
First signal isolated location 2, connects above-mentioned signal transmitting unit 1, sends single for disabling signal
Power frequency component in the power line signal that unit 1 sends.In the preferred embodiment of the present invention, so-called power frequency
Signal, is i.e. in the power line signal of the frequency of the alternating current power supply of industrial use, and usually 50Hz is left
The right side, these power frequency components belong to low frequency signal in whole power line signal, and belong in carrier communication
Uncorrelated signal.Above-mentioned power frequency component is blocked by arranging the first signal isolated location 2 at this, thus
The carrier signal only allowing high frequency is passed through.
Secondary signal isolated location 3, connects the first signal isolated location 2, and connects above-mentioned signal and connect
Receive unit 5.In the preferred embodiment of the present invention, owing to power line signal uses alternating current transmission, because of
This uses symmetrical structure, the most above-mentioned secondary signal isolated location 3 and the first signal isolated location in systems
The structure of 2 mirror images each other, it is possible to power line signal and the signal of balanced signal transmitting element 1 one end connect
Receive the power line signal of unit 5 one end.
Signal attenuation unit 4, accesses above-mentioned first signal isolated location 2 and secondary signal isolated location 3
Between.Further, in the preferred embodiment of the present invention, as shown in Figure 4, above-mentioned signal attenuation list
Y-shaped is become to connect between unit's the 4, first signal isolated location 2 and secondary signal isolated location 3；More
Further, above-mentioned signal attenuation unit 4 accesses the first signal isolated location 2 and secondary signal isolation list
At a reference mode A between unit 3.Above-mentioned signal attenuation unit 4 hinders by regulating the signal of self
Amount controls the signal obstruction amount in whole system, thus controls the decay of power line signal in whole system
Degree.
In the preferred embodiment of the present invention, owing to power line signal is transmitted in circuit, the most above-mentioned letter
Number impedance that obstruction amount is in alternating current circuit, i.e. signal attenuation unit 4 are controlled by regulation direct impedance
The dough softening of power line signal (being now the carrier signal of high frequency by signal isolation processing).
In the preferred embodiment of the present invention, further, as shown in Figure 4, above-mentioned first signal isolation
Unit 2 also includes:
First balance module 21, for the signal obstruction amount of balance the first signal isolated location 2 both sides.
Therefore, correspondingly, in the preferred embodiment of the present invention, with the first signal isolated location 2 each other
The secondary signal isolated location 3 of mirror image also includes one second balance module 31, is used for balancing secondary signal
The signal obstruction amount of isolated location 3 both sides.First balance module 21 and the second balance module 31 are the most each other
Mirror image.
The implementation of above-mentioned first balance module 21 and the second balance module 31 is by being detailed below.
In the preferred embodiment of the present invention, the most as shown in Figure 4, above-mentioned power line signal Attenuation adjustable
System also includes:
First signal transmission unit 6, be connected to above-mentioned signal transmitting unit 1 and signal receiving unit 5 it
Between.In the preferred embodiment of the present invention, due to the power frequency component (frequency 50Hz) in power line signal
It is blocked by signal isolation processing, therefore a signal transmission unit 6 is set and can transmit this power frequency component.
Power frequency component is transferred in signal receiving unit 5 undampedly, to supply follow-up load.So arrange
It is capable of power line signal and passes through low-frequency range is undamped, and carry out the invention of attenuation test at high band
Purpose.
In the preferred embodiment of the present invention, owing to cannot affirm that whether the carrier signal of high frequency is according to anticipation
Line transmission, it is therefore desirable to increase a secondary signal transmission unit 8, this secondary signal transmission unit 8
With the first signal transmission unit 6 mirror image each other, i.e. it is similarly coupled to above-mentioned signal transmitting unit 1 and signal
Receive between unit 5, the power frequency component being blocked for transmission.
Structure between above-mentioned first signal transmission unit 6 and secondary signal transmission unit 8 is arranged the most such as
Shown in Fig. 5 and described below.
In the preferred embodiment of the present invention, as shown in Figure 4, above-mentioned power line signal Attenuation adjustable system
In also include:
Adjustable attenuation unit 7, connects signal attenuation unit 6.In order to ensure the personal safety of operator,
Need whole attenuation process is remotely controlled, therefore in the preferred embodiment of the present invention, arrange
State adjustable attenuation unit 7.
Further, in the preferred embodiment of the present invention, above-mentioned adjustable attenuation unit 7 includes:
Monitoring modular 71, for monitor above-mentioned signal attenuation unit 6 current signal obstruction amount (i.e. when
Front impedance)；
Processing module 73, connects above-mentioned monitoring modular 71 by a communication module 72.The present invention's is preferable
Embodiment in, above-mentioned processing module 73 obtains the monitoring result of monitoring modular 71 by communication module 72.
Meanwhile, processing module 73 obtains the operational order of outside input (can be that user is by an input equipment
Input, the most not shown), and according to the monitoring result of monitoring modular 71 and the current behaviour obtained
Make instruction process form corresponding regulating command and export.In the preferred embodiment of the present invention, regulation refers to
Order is the present impedance according to signal attenuation unit 6, signal attenuation unit 6 is adjusted to be in operation and refers to
Under the impedance that order requires.
Drive module 74, connect processing module 73 by above-mentioned communication module 72, be used for obtaining above-mentioned tune
Joint instruction, and be adjusted to be under a corresponding impedance by signal attenuation unit 6 according to regulating command.
In one preferred embodiment of the present invention, when above-mentioned signal attenuation unit 6 is a rheostat (as
Shown in Fig. 5), the most above-mentioned monitoring modular 71 is an absolute optical encoder, is used for monitoring rheostat
The current location of variable resistance contact, and to be passed back in processing module 73 by communication module 72 (can be one
Computer installation).
Further, in these cases, module 74 is driven to may include that
Motor component 741, for moving the position of variable resistance contact；
Motor driving part part 742, receives above-mentioned regulating command, and drives motor component 741 variable resistance to be touched
Point is mobile to relevant position, thus changes signal attenuation unit 6(rheostat) present impedance.
In the preferred embodiment of the present invention, a kind of according to the formation of above-mentioned power line signal Attenuation adjustable system
Circuit structure as it is shown in figure 5, particularly as follows:
Signal transmitting unit 1 is connected between live wire and zero line, and signal receiving unit 5 is also connected to live wire
And between zero line.
First signal isolated location 2 includes:
First electric capacity C1, is connected on live wire, and connects signal transmitting unit 1, is used for blocking power frequency letter
Number, and make the carrier signal of high frequency pass through.
First resistance R1, is connected between the first electric capacity C1 and a reference mode A, as the first electric capacity
The load of C1.
The first balance module 21 in first signal isolated location 2 includes:
Second electric capacity C2, is connected between live wire and zero line, and connects above-mentioned signal transmitting unit 1,
The most in parallel with the first electric capacity C1 and the first resistance R1, for the impedance at balance the first electric capacity C1 two ends.
Second resistance R2, is connected between the second electric capacity C2 and zero line, bearing as the second electric capacity C2
Carry.
In the preferred embodiment of the present invention, due to above-mentioned first signal isolated location 2 and secondary signal every
From unit 3 mirror image each other, therefore for secondary signal isolated location 3, including:
3rd electric capacity C3(and the first electric capacity C1 mirror image each other), it is connected on live wire, and connects
State signal receiving unit 5；
3rd resistance R3(and the first resistance R1 mirror image each other), it is connected on the 3rd electric capacity C3 and above-mentioned ginseng
Examine between node A, as the load of the 3rd electric capacity C3.
Above-mentioned ginseng in the preferred embodiment of the present invention, between the first resistance R1 and the 3rd resistance R3
Examine the access one i.e. rheostat R0 of signal attenuation unit 6(on node A), further, it is an accurate change
Resistance device R0.Therefore, in the preferred embodiment of the present invention, the first resistance R1 is connected on the first electric capacity C1
With between rheostat R0, the first electric capacity C1 accesses zero line by the first resistance R1 and rheostat R0；
In like manner, the 3rd resistance R3 is connected between the 3rd electric capacity C3 and rheostat R0, and the 3rd electric capacity C3 leads to
Cross the 3rd resistance R3 and rheostat R0 and access zero line.
In the preferred embodiment of the present invention, above-mentioned rheostat R0 includes a variable resistance contact B, this change
Resistance contact B connects an adjustable attenuation unit 7.Further, as it is shown in figure 5, the present invention preferably
In embodiment, also as described above, adjustable attenuation unit 7 includes the monitoring of a connection variable resistance contact B
Absolute optical encoder in the preferred embodiment of module 71, the i.e. present invention；One processing module 73,
I.e. the computer installation in the preferred embodiment of the present invention, connects monitoring modular by communication module 72
71；One motor driving part part 742, connects processing module 73 by communication module 72；And one connect electricity
The motor component 741 of machine driver part 742, is simultaneously connected with above-mentioned variable resistance contact B.
In the preferred embodiment of the present invention, system first passes through monitoring modular 71 and monitors variable resistance contact B
Current location, and be sent in processing module 73 by communication module 72.Processing module 73 is according to outward
The operational order of portion's input, on the basis of the current location of the variable resistance contact B that monitoring modular 71 monitors
On, process forms a regulating command, i.e. calculates variable resistance contact B needs mobile how many distances.Motor
Driver part 742 obtains, by communication module 72, the regulating command that processing module 73 sends, and according to this
Regulating command drives motor component 741 to move variable resistance contact to relevant position, thus changes whole variable resistance
The impedance of device, is finally reached the purpose of the dough softening changing power line signal.
In the preferred embodiment of the present invention, as it is shown in figure 5, in above-mentioned secondary signal isolated location 3
Second balance module 31 includes:
4th electric capacity C4(and the second electric capacity C2 mirror image each other), it is connected between live wire and zero line, with
And connect above-mentioned signal receiving unit 5, and the most in parallel with the 3rd electric capacity C3 and the 3rd resistance R3, it is used for
Balance the impedance at the 3rd electric capacity C3 two ends.
4th resistance R4(and the second resistance R2 mirror image each other), be connected on the 4th electric capacity C4 and zero line it
Between, as the load of the 4th electric capacity C4.
In the preferred embodiment of the present invention, still as it is shown in figure 5, above-mentioned first signal transmission unit 6
Being one first inductance L1, this first inductance L1 is connected to signal transmitting unit 1 and signal receiving unit 5
Between；Specifically, one end of the first inductance L1 is connected to signal transmitting unit 1 and the first electric capacity C1
Between circuit on, the other end is connected on the circuit between signal receiving unit 5 and the 3rd electric capacity C3,
The power frequency component being blocked for transmission.Further, in the preferred embodiment of the present invention, such as Fig. 5
Shown in, the two ends of above-mentioned first inductance L1 are respectively connected to live wire.
In the preferred embodiment of the present invention, still as it is shown in figure 5, above-mentioned secondary signal transmission unit 8
It is one second inductance L2(and the first inductance L1 mirror image each other), this second inductance L2 is again connected to letter
Number between transmitting element 1 and signal receiving unit 5；Specifically, one end of the second inductance L2 connects
On circuit between signal transmitting unit 1 and the first electric capacity C1, the other end is connected to signal and receives single
On circuit between unit 5 and the 3rd electric capacity C3, the power frequency component being blocked for transmission.Further,
In the preferred embodiment of the present invention, as it is shown in figure 5, the two ends of above-mentioned second inductance L2 are respectively connected to
Zero line.
The structure of above-mentioned first inductance L1 and the second inductance L2 mirror image each other is arranged, it is ensured that the carrier wave of high frequency
Signal according to the line transmission of anticipation, thus can ensure that the signal attenuation of actual measuring and calculating meets Expected Results.
Further, in the preferred embodiment of the present invention, in order to improve whole symmetrical structure, such as Fig. 5
Shown in, above-mentioned first signal isolated location 2 also includes:
5th electric capacity C5, is connected on zero line, and connects signal transmitting unit 1, with above-mentioned first electric capacity
C1 mirror image each other, is i.e. equally used for blocking power frequency component, and makes the carrier signal of high frequency pass through.
5th resistance R5, is connected on zero line, is connected on the 5th electric capacity C5 and a reference node further
Between some C, as the load of the 5th electric capacity C5.Above-mentioned 5th resistance R5 and the first resistance R1 is each other
Mirror image.
Further, in the preferred embodiment of the present invention, in order to improve whole symmetrical structure, the most such as
Shown in Fig. 5, above-mentioned secondary signal isolated location 3 also includes:
6th electric capacity C6, is connected on zero line, and connects signal transmitting unit 1, is used for blocking power frequency letter
Number, the 6th electric capacity C6 and the 3rd electric capacity C3 mirror image each other.
6th resistance R6, is series between the 6th electric capacity C6 and above-mentioned reference mode C, as the 6th electricity
Hold the load of C6.Above-mentioned 6th resistance R6 and the 3rd resistance R3 mirror image each other.
In the preferred embodiment of the present invention, as it is shown in figure 5, above-mentioned reference mode C is rheostat R0
With the junction point of zero line, above-mentioned reference mode A is the junction point of rheostat R0 and live wire.
Therefore, in the preferred embodiment of the present invention, in sum, in Figure 5, the first electric capacity C1,
3rd electric capacity C3, the 5th electric capacity C5 and the 6th electric capacity C6 capacitance the most equal；Second electric capacity C2
Equal with the capacitance of the 4th electric capacity C4；First resistance R1, the 3rd resistance R3, the 5th resistance R5 and
The resistance of the 6th resistance R6 is the most equal；Second resistance R2 and the 4th resistance R4 resistance are equal.
The signal attenuation regulation model built with the circuit diagram structure shown in Fig. 5, carries out testing shape to it
The amplitude-frequency response become and phase-frequency response are as shown in fig. 6-7.
As shown in Figure 6, power line signal low-frequency range can be undamped pass through, and whole at high band
Flatter trend can be kept in individual frequency band.
As it is shown in fig. 7, in the frequency band of power line signal, signal attenuation process can keep one to compare
, there is not larger fluctuation as shown in Figure 2 in smooth phase place.
The foregoing is only preferred embodiment of the present invention, not thereby limit embodiments of the present invention and
Protection domain, to those skilled in the art, it should can appreciate that all utilization description of the invention
And the equivalent done by diagramatic content and the scheme obtained by obvious change, all should comprise
Within the scope of the present invention.
Claims (13)
1. a power line signal dough softening regulation system, it is characterised in that including:
Signal transmitting unit, for output power line signal；
First signal isolated location, connects described transmitting element, for isolating in described power line signal
Power frequency component；
Secondary signal isolated location, connects described first signal isolated location, is used for isolating described electric lines of force
Power frequency component in signal；
Described first signal isolated location and described secondary signal isolated location mirror image each other；
Signal attenuation unit, access described first signal isolated location and described secondary signal isolated location it
Between a reference mode at, by regulate self signal obstruction amount control described power line signal decay
Degree；
Signal receiving unit, connects described secondary signal isolated location, for receiving after overdamping adjusts
Described power line signal；
Described first signal isolated location includes:
First electric capacity, is connected on live wire, and connects described signal transmitting unit respectively and described signal declines
Subtract unit, be used for blocking described power frequency component；
First resistance, is connected between described first electric capacity and described signal attenuation unit, as described
The load of one electric capacity；
First balance module, is connected between live wire and zero line, and connects described signal transmitting unit,
For balancing the signal obstruction amount of described first signal isolated location both sides.
2. power line signal dough softening regulation system as claimed in claim 1, it is characterised in that described
First balance module includes:
Second electric capacity, is connected between live wire and zero line, and connects described signal transmitting unit, and with
Described first electric capacity and described first resistor coupled in parallel；
Second resistance, is connected between described second electric capacity and zero line.
3. power line signal dough softening regulation system as claimed in claim 1, it is characterised in that described
Secondary signal isolated location includes:
3rd electric capacity, is connected on live wire, and connects described signal transmitting unit respectively and described signal declines
Subtract unit, be used for blocking described power frequency component；
3rd resistance, is connected between described 3rd electric capacity and described signal attenuation unit；
Second balance module, for balancing the signal obstruction amount of described secondary signal isolated location both sides.
4. power line signal dough softening regulation system as claimed in claim 3, it is characterised in that described
Second balance module includes:
4th electric capacity, is connected between live wire and zero line, and connects described signal receiving unit, and with
Described 3rd electric capacity and described 3rd resistor coupled in parallel；
4th resistance, is connected between described 4th electric capacity and zero line.
5. power line signal dough softening regulation system as claimed in claim 1, it is characterised in that described
First signal isolated location also includes:
5th electric capacity, is connected on zero line, and connects described signal transmitting unit respectively and described signal declines
Subtract unit, be used for blocking described power frequency component；
Described 5th electric capacity and described first electric capacity mirror image each other；
5th resistance, is connected between described 5th electric capacity and described signal attenuation unit, as described
The load of five electric capacity；
Described 5th resistance and described first resistance mirror image each other.
6. power line signal dough softening regulation system as claimed in claim 3, it is characterised in that described
Secondary signal isolated location also includes:
6th electric capacity, is connected on zero line, and connects described signal transmitting unit respectively and described signal declines
Subtract unit, be used for blocking described power frequency component；
Described 6th electric capacity and described 3rd electric capacity mirror image each other；
6th resistance, is connected between described 6th electric capacity and described signal attenuation unit；
Described 6th resistance and described 3rd resistance mirror image each other.
7. power line signal dough softening regulation system as claimed in claim 1, it is characterised in that also wrap
Include:
First signal transmission unit, connects described signal transmitting unit and described signal receiving unit respectively,
The described power frequency component blocked by described first signal isolated location for transmission.
8. power line signal dough softening regulation system as claimed in claim 7, it is characterised in that described
First signal transmission unit is an inductance, and the two ends of described inductance are both connected on live wire.
9. power line signal dough softening regulation system as claimed in claim 7, it is characterised in that also wrap
Include:
Secondary signal transmission unit, connects described signal respectively and starts unit and described signal receiving unit,
The described power frequency component blocked by described first signal isolated location for transmission；
Described secondary signal transmission unit and described first signal transmission unit mirror image each other.
10. power line signal dough softening regulation system as claimed in claim 9, it is characterised in that institute
Stating secondary signal transmission unit is an inductance, and the two ends of described inductance are both connected on zero line.
The 11. power line signal dough softening as claimed in claim 1 regulation systems, it is characterised in that institute
State signal attenuation unit to include:
Rheostat, is connected between live wire and zero line, and described rheostat connects one end of live wire and accesses described
Between first signal isolated location and described secondary signal isolated location.
The 12. power line signal dough softening as claimed in claim 11 regulation systems, it is characterised in that also
Including:
Adjustable attenuation unit, connects described signal attenuation unit；
Described adjustable attenuation unit farther includes:
Monitoring modular, for monitoring the current location of described rheostatic variable resistance contact；
Processing module, connects described monitoring modular by a communication module, for according to described monitoring modular
Monitoring result, and the operational order process of outside input forms a corresponding regulating command and exports；
Drive module, connect described processing module by described communication module, be used for receiving described regulation and refer to
Order, and according to described regulating command, described variable resistance contact is moved to relevant position.
The 13. power line signal dough softening as claimed in claim 12 regulation systems, it is characterised in that institute
State driving module to include:
Motor component, is used for controlling described variable resistance contact and moves；
Motor driving part part, connects described motor component, for driving described electricity according to described regulating command
Machine operates.
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| CN201410158090.7A CN104092480B (en) | 2014-04-18 | 2014-04-18 | Power line signal attenuation degree adjusting system |
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| CN201410158090.7A CN104092480B (en) | 2014-04-18 | 2014-04-18 | Power line signal attenuation degree adjusting system |
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| CN104092480A CN104092480A (en) | 2014-10-08 |
| CN104092480B true CN104092480B (en) | 2017-01-11 |
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| CN116094545B (en) * | 2023-02-03 | 2023-12-08 | 河北泽丰宇辰电气设备制造有限公司 | Method and system for solving application interference of plc electrical control equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4483546B2 (en) * | 2004-11-19 | 2010-06-16 | ソニー株式会社 | Power line carrier communication system, power supply device and electronic device used therefor, and power line carrier communication method |
| CN102510301A (en) * | 2011-11-02 | 2012-06-20 | 华北电网有限公司计量中心 | Bidirectional signal attenuation circuit of low-voltage power line carrier |
| CN203071930U (en) * | 2012-12-13 | 2013-07-17 | 深圳市国电科技通信有限公司 | Power line broadband communication signal attenuator |
| CN203840336U (en) * | 2014-04-18 | 2014-09-17 | 钜泉光电科技(上海)股份有限公司 | Signal attenuation degree adjusting system of power line |
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2014
- 2014-04-18 CN CN201410158090.7A patent/CN104092480B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4483546B2 (en) * | 2004-11-19 | 2010-06-16 | ソニー株式会社 | Power line carrier communication system, power supply device and electronic device used therefor, and power line carrier communication method |
| CN102510301A (en) * | 2011-11-02 | 2012-06-20 | 华北电网有限公司计量中心 | Bidirectional signal attenuation circuit of low-voltage power line carrier |
| CN203071930U (en) * | 2012-12-13 | 2013-07-17 | 深圳市国电科技通信有限公司 | Power line broadband communication signal attenuator |
| CN203840336U (en) * | 2014-04-18 | 2014-09-17 | 钜泉光电科技(上海)股份有限公司 | Signal attenuation degree adjusting system of power line |
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