CN1059527C - Circuit and method for communication using power line - Google Patents
Circuit and method for communication using power line Download PDFInfo
- Publication number
- CN1059527C CN1059527C CN96100888A CN96100888A CN1059527C CN 1059527 C CN1059527 C CN 1059527C CN 96100888 A CN96100888 A CN 96100888A CN 96100888 A CN96100888 A CN 96100888A CN 1059527 C CN1059527 C CN 1059527C
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- China
- Prior art keywords
- supply line
- magnet
- information
- earth
- user side
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Abstract
The present invention relates to a circuit and a method for communication by using a power supply line. An information transmitting device is used for transmitting modulated information to the ground, a receiving device is used for receiving information inducted by unbalanced current on a user side of a grounded point, and the communication which is not influenced by electric network loads and electric network interference is realized. The communication method has the advantages of low power transmitting requirement and power receiving requirement, simplicity, reliably and low cost, and is especially suitable for the occasions by using the low-voltage power supply line to automatically read watt-hour meters, gas meters, water meters, etc. of users.
Description
A kind of method of utilizing supply line to communicate.
Because supply line enters all users that is powered, therefore very convenient as communication, but known communication means all is that the mode of signal with carrier wave is applied directly in the supply line.This method has many technical difficulties, its just like line load is heavy, the carrier wave transmitted power just needs big so, they are two years old, because supply line and whole big electrical network link together, therefore the interference with electrical network of self adds together and can form the interference source that frequency band is very wide, signal is very strong, make can proper communication the installation cost costliness, performance difficulty.
Task of the present invention be design a kind of be subjected to the line load weight influence little, influenced by Disturbance in Power Net also little, the method for utilizing low-voltage supply line to communicate.
Fig. 1 is the single phase circuit schematic diagram, and Fig. 2 is the three-phase circuit schematic diagram.U, N (single-phase) U, V, W, N (three-phase) are the supply side power ends of supply line among the figure.Source end N is a zero line, and it links to each other with the earth (ground connection) by earth connection ab, and U, V, W and phase line link to each other, device A
1, A
2... .A
nA transmitting device for load side or title user side.Claim transmitting device A in the present invention
nBe any transmitting device in this supply line, claim on circuit near source end U, V, W, N be mains side, claim close transmitting device A
nBe user side.Signal receiving device T is the user side that is contained in earth connection ab.Signal receiving device T is one can detect the device that flows into total current in the subscriber's side powered circuit of earth connection and flow out total current difference.
The present invention is achieved in that when the user side transmitting device does not all send information, owing to flow through the inflow total current at receiving system T place and flow out total current always equal, therefore, there is not output signal among the receiving system T, and when some transmitting devices send modulated information to the earth, because the information electric current is by a supply line, the earth and earth connection ab form the loop, rather than form the loop by supply line fully, therefore, flow into total current and outflow total current at receiving system T place and will differ an electric current that signal produced of transmission over the ground, receiving system T just has the information output that transmitting device sends.So just can finish from the communication task between user's transmitting device and the receiving system.
Receiving system T, a coupling magnet is arranged, be wound with induction coil on the magnet, it is characterized in that, the electric current with flowing out that flows in the single-phase or three-phase line by the power supply of this supply line all passes through from magnet, and guarantee that under the circuit normal condition electric current that flows into and the electric current of outflow instantaneously all equate at each from magnet.Because the electric current in the supply line comprises the total current of inflow and the total current of outflow, all from this magnet, pass through, therefore be wound on the information of only responding to the difference between current that flows to and flow out in the coil on this magnet, thereby realize the purpose of reception information.
A kind of method of utilizing low-voltage supply line to communicate, user side have the transmitting device A that sends information over the ground
n, mains side has the zero line that links to each other with the earth, at the user side of mains side zero line and the earth tie point signal receiving device T is arranged, and it is characterized in that:
The information of a user side sends the earth,
B signal receiving device T is mounted in the user side of mains side zero line and the earth tie point,
C signal receiving device (T) has a coupling magnet, be wound with induction coil on the magnet, the electric current with flowing out that flows in the single-phase or three-phase line by the power supply of this supply line all passes through from coupling magnet, and guarantee that under the circuit normal condition electric current that flows into and the electric current of outflow are in each instantaneous equating from magnet.
Subscriber's side powered circuit also has leakage current to the earth, but because transmitting device A
nWhat send is the signal of process particular modulation, and it has the feature on frequency and the sequential, and therefore method of the present invention is easy to useful information is separated.
Because transmitting device A among the present invention
nThe earth is sent information, its signal code does not constitute the loop by supply line, load current in the supply line and interference signal then constitute the loop by supply line, when therefore communicating, be not subjected to the influence of disturbing in supply line's load weight and the circuit with method of the present invention; Because receiving system T mains side has an earth connection ab, therefore the interference that constitutes at this earth point mains side Ground leakage current also can not influence the reception of receiving system T simultaneously.This method has realized the task that the present invention proposes.
Because the communication that utilizes supply line that the present invention realizes, be not subjected to the influence disturbed in line load weight and the circuit, therefore the communication means transmitted power requires low, it is also low to receive requirement, thereby it is simple and reliable, cost is lower, is particularly suitable for utilizing low-voltage supply line that user's kilowatt-hour meter, gas meter, water meter etc. are copied the occasion of seeing automatically and uses.
An embodiment, the transmitting device A of user side
n, the information that the earth is sent is through ovennodulation.
Sending the information modulator approach over the ground is one of following mode or its combination:
A is modulated at the information that sends on the particular carrier wave frequency,
B is modulated at the information that sends on the particular carrier wave frequency, and sends in particular moment,
C presses " 1 " for (or nothing) carrier wave is arranged with waiting message, and " 0 " sends specific frequency information for the rule serial of not having (or having) carrier wave.
Transmitting device A
nTo the method for the earth transmission information, be that the information through ovennodulation is sent over the ground by electric capacity or coupling transformer.
Magnet among the receiving system T is characterized in that in two, and its signal is to export by coupling by the coil that is wound on the magnet.Magnet is convenient to install in actual applications in two.
Claims (4)
1. method of utilizing low-voltage supply line to communicate, user side has the transmitting device (A that sends information over the ground
n), mains side has the zero line that links to each other with the earth, at the user side of mains side zero line and the earth tie point signal receiving device (T) is arranged, and it is characterized in that:
The information of a user side sends the earth,
B signal receiving device (T) is mounted in the user side of mains side zero line and the earth tie point,
C signal receiving device (T) has a coupling magnet, be wound with induction coil on the magnet, the electric current with flowing out that flows in the single-phase or three-phase line by the power supply of this supply line all passes through from coupling magnet, and guarantee that under the circuit normal condition electric current that flows into and the electric current of outflow are in each instantaneous equating from magnet.
2. according to the described a kind of method of utilizing low-voltage supply line to communicate of claim 1, it is characterized in that signal transmitter (A
n) information is modulated on the carrier wave of characteristic frequency, or be modulated on the carrier wave of particular moment.
3. according to the described a kind of method of utilizing low-voltage supply line to communicate of claim 1, it is characterized in that modulated information sends over the ground by electric capacity or coupling transformer.
4. according to the described a kind of method of utilizing low-voltage supply line to communicate of claim 1, it is characterized in that the magnet in the receiving system is in two, its signal is to export by coupling by the coil that is wound on the magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96100888A CN1059527C (en) | 1996-02-05 | 1996-02-05 | Circuit and method for communication using power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96100888A CN1059527C (en) | 1996-02-05 | 1996-02-05 | Circuit and method for communication using power line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156926A CN1156926A (en) | 1997-08-13 |
| CN1059527C true CN1059527C (en) | 2000-12-13 |
Family
ID=5116790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100888A Expired - Fee Related CN1059527C (en) | 1996-02-05 | 1996-02-05 | Circuit and method for communication using power line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059527C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195614B (en) * | 2006-12-04 | 2011-10-26 | 河南康泰制药集团公司 | Production of balofloxacin and purification process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100755A (en) * | 1985-04-01 | 1986-10-08 | 温健 | Distribution zero-sequence network two-way carrier communication system |
-
1996
- 1996-02-05 CN CN96100888A patent/CN1059527C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100755A (en) * | 1985-04-01 | 1986-10-08 | 温健 | Distribution zero-sequence network two-way carrier communication system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195614B (en) * | 2006-12-04 | 2011-10-26 | 河南康泰制药集团公司 | Production of balofloxacin and purification process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1156926A (en) | 1997-08-13 |
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Effective date of registration: 20111208 Address after: 102299 Beijing City, Changping science and Technology Park white floating Road 10 industrial building 7 B zone Patentee after: Pan Zhikai Address before: 100086, Beijing, Haidian District, No. 56 West Fourth Ring Road, glorious Times Building, 12 floor Patentee before: Beijing brilliant top energy science and technology limited company |
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