CN100474788C - Pipeline communication method - Google Patents
Pipeline communication method Download PDFInfo
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- CN100474788C CN100474788C CNB031345565A CN03134556A CN100474788C CN 100474788 C CN100474788 C CN 100474788C CN B031345565 A CNB031345565 A CN B031345565A CN 03134556 A CN03134556 A CN 03134556A CN 100474788 C CN100474788 C CN 100474788C
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- pipeline
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- terminating machine
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Abstract
This invention relates to a pipeline communication composed of a front end processor connected at one end of the communication medium and a destination unit at the other characterizing that the medium between them is a pipeline. Two earth cords at both ends of the pipeline are buried at the points larger than 15 meters, both ends of the pipeline and the earths are connected with the front end processor and the destination unit which are formed by digital ports and analog ports separately, the digital port of the front one is connected with the digital equipment port of the monitor chamber, the port of the circuit destination is linked to the ports of communication devices of each generation field, the analog ports of the front end and destination are connected with the pipeline and said eaths.
Description
Technical field: the present invention relates to a kind of method of utilizing pipeline communication.
Background technology: at oil field and gas field, the floor data that needs to be dispersed in a plurality of productions in certain zone (as pumpingh well or gas recovery well) is sent to that Control Room is monitored and data processing, communication is adopted in signal transmission at present mostly, and the shortcoming of radio communication is if the mining area is with a varied topography, can bring the inconvenience in very big investment and the operation to the construction of wireless transfer channel.And adopt aerial line, aerial cable, underground cable, power supply circuit or telecommunication cable will cause bigger construction investment.
Summary of the invention: the purpose of this invention is to provide a kind of method of pipeline communication, it is reduced investment outlay, easy construction, can make full use of existing resource.
The object of the present invention is achieved like this, a kind of method of pipeline communication, it is made up of the front-end processor that is connected communication media one end, the terminating machine that is connected on the communication media other end, and its method feature is: the communication media that is connected between front-end processor and the terminating machine is a pipeline.
Described pipe ends has and is embedded in underground earth point greater than 15 meters and constitutes ground wire, and the two ends of pipeline are connected with terminating machine with front-end processor respectively with the ground wire at two ends.
Described front-end processor and terminating machine are made up of digital port and analog port respectively.
The digital port of front-end processor is connected with the digital device port of Control Room, and the machine digital port of line terminal is connected with each communication equipment mouth of producing the field, station; The analog port of front-end processor and terminating machine is taken over road and described ground wire.
Utilize the method for pipeline communication mainly to design among the present invention at the mine and the oil gas field transmission creation data of underground pipe net.At oil field and gas field, the floor data that needs to be dispersed in a plurality of productions in certain zone (as pumpingh well or gas recovery well) is sent to that Control Room is monitored and data processing, utilize each well station to finish the transmission of creation data, be characterized in reducing investment outlay, easy construction, be designed to different transmitted powers and receiving signal sensitivity according to different geological conditions and weather conditions and make characteristics such as reliable communications, passage overall failure rate be low to the buried pipeline of gathering station.Simultaneously, especially at oil field and gas field, the social environment more complicated utilizes the pipeline communication machine to carry out transfer of data, complete machine can be handled with burying, problems such as equipment pilferage and the destruction the problem includes: of having avoided the radio communication problem.The pipeline communication machine not only can be used for oil gas field, can also be applied to have Buried Pipeline Network Systems and digital transmission communication is carried out in city of surface state complexity, enterprise, biotope etc.In sum, this machine can be considered novel communication equipment, has good market prospects.
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Description of drawings: Fig. 1 is the oil well in oil field and the distribution map of measuring station.
Fig. 2 utilizes the pipeline communication machine to carry out data communication connecting line structural representation.
Fig. 3 is the reduced graph of Fig. 2.
Fig. 4 is the pipeline communication equivalent circuit diagram.
Fig. 5 is front-end processor and terminating machine circuit theory diagrams.
Embodiment: as Fig. 1, in the oil field, the working condition monitoring of pumping unit of well is to finish by its indicator card of monitoring analysis, therefore, the monitor data that the monitoring remote terminal RTU that is installed in the well site will be gathered is sent to the computer system of measuring station or block station, just can carry out the oil pumper performance analysis.With the measuring station is example, and each 3-15 in measuring station linchpin well does not wait, and the production fluid of each well is transported to the measuring station metering and transfers processing, the distribution of well and measuring station by burying the pressure of ground one-pipe by the generation of well head oil pumper.
As shown in Figure 2, it is in the oil pumper data acquisition monitoring system, utilizes the pipeline communication machine to carry out data communication wiring schematic diagram is installed.
Utilize one-pipe to carry out transfer of data, its basic design philosophy is to come transmission signals with pipeline and the earth as communication media.Pipeline communication circuit front-end processor and terminating machine all have two port D mouths (numeral mouth) and A mouth (simulation mouth), the D mouth of circuit front-end processor connects the computer data port of SCADA system or DCS system, the A mouth is taken over road front end and the earth, be that one of A mouth terminates on the pipeline, the other end is connected on apart from pipeline and buries the place greater than on 30 meters the earth electrode; The D mouth of line terminal machine connects the digital port of on-the-spot RTU, and the A mouth is taken over road and the earth, i.e. a termination pipe end of A mouth, and another termination is buried the place greater than on 30 meters the earth electrode apart from pipeline, and the earth electrode earth resistance of front-end processor and terminating machine A mouth requires less than 3 Ω.
Now Fig. 2 is reduced to Fig. 3, sets forth its Principle of Communication.When Control Room computer or on-the-spot RTU send signal, the circuit terminal switches to input with the D mouth, the A mouth switches to output, the treated Zai Frequency signal that is modulated into of digital signal sends on pipeline and the earth electrode from the A mouth, and the load resistance of A mouth is the earth resistance between buried pipeline and earth electrode, because pipeline buries ground, its earth resistance is very little, and the electric current that the A mouth sends out is absorbed by buried pipeline, and current density is in the transmitting terminal maximum of pipeline.Suppose pipeline bury ground the region in earth resistance be uniform, then the current density on the pipeline descends by certain gradient on the length direction of pipeline, a small signal drops is arranged on the A mouth of pipe end line terminal machine so, after the demodulation shaping is amplified in this signal drops via line terminating machine filtering, from digital port D output, finished the transmission of digital signal.This transmission and reception are two-way, controlled by the port association instrument of digital device.When the design of line scan pickup coil side machine, be regardless of front-end processor and terminating machine, front-end processor and terminating machine are the differentiation on the installation site, are identical and symmetrical on the function, same circuit terminal can be installed in the circuit front end can be installed in the line terminal again, and the transmission of signal and reception are two-way.When the field monitoring point is multiple spot (as the signals collecting and the monitoring of a plurality of oil wells), can finish the data acquisition and the monitoring of field, a plurality of station with the RS-485 agreement.
As Fig. 4, the key Design thought of pipeline communication machine is to utilize buried pipeline and the earth as communication media, and this is to break through conventional a kind of thought.According to conventional engineering design thought, pipeline buries ground, and earth electrode also buries ground, thinks it is short circuit on the engineering between the two.But, it is made a theory analysis, exist a small impedance between the two, its lumped parameter equivalent electric circuit such as Fig. 4.L is the inductance when pipeline is regarded as open-wire line among the figure, and C is the electric capacity between pipeline and the ground, and R is the resistance between pipeline and the earth electrode.Little when L is than open-wire line in three parameters, C decides along with the thickness of pipeline, and is all big than aerial line generally speaking.If reasonably select the carrier frequency of transmission system, then L and C can ignore, and the parameter that plays a decisive role is R.R is the earth resistance R of earth electrode
JEarth resistance R with pipeline
GSeries connection, that is:
R＝R
J+R
G
The earth resistance R of pipeline
GBe numerically equal to from pipeline holds between beginning and earth electrode the grounding conductance on the unit length along the inverse of duct length 1 direction upper integral, that is: with burying
R
G＝1/∫ρ’(x)dx
ρ in the formula (x) is a very complicated function, with soil property, weather, pipe diameter and length, underground pipe network structure, pipeline whether factor such as preservative treatment and construction quality relation is all arranged, value through rough estimation R is very little, therefore when between pipeline front end and earth electrode, sending the signal of certain power, be quite little in the pipe end signal level.Through test, for the seamless steel pipe of DN60, pipeline does not have dark one meter of preservative treatment in the high plateau of Gansu loess area, and the pipeline front end signal was 1 watt-hour when duct length was 2 kilometers, pipe end can obtain the signal of about 2mV, and this signal strength signal intensity obtains test with audio frequency apparatus.
Fig. 5 is front-end processor and terminating machine circuit theory diagrams, front-end processor and terminating machine include amplitude limiting amplifier circuit, filter circuit, selective frequency amplifier circuit, automatic gain control circuit, demodulator circuit, shaping amplification circuit, the analog quantity electronic switch, the digital quantity electronic switch, power amplifier, modulation circuit, carrier frequency generation circuit, the transmitting-receiving control circuit is formed, the information that analog quantity electronic switch input is sent here through pipeline and the earth receiving pipeline on the one hand, send the modulation signal that amplifies through power amplifier to pipeline on the other hand, modulation signal is by carrier frequency generation circuit, shaping amplification circuit control, receive and send by the control of transmitting-receiving control circuit, the information that receives from pipeline is through amplitude limiting amplifier circuit, filter circuit, selective frequency amplifier circuit, automatic gain control circuit, demodulator circuit, after shaping amplification circuit is handled respectively, send into digital quantity electronic switch input, the digital and electronic switch receives the order or the information of external control device, divide two-way with the order of external control device or information after by the shaping amplification circuit shaping, one tunnel control transmitting-receiving control circuit is opened simulant electronic switch and is used for sending digital signal, another route modulation circuit to pipeline, carrier frequency generation circuit, power amplifier is handled by simulant electronic switch and is sent order and information to pipeline.
In the oil field pumping well data acquisition monitoring system, underground piping links together, and pipe network is quite huge, so earth resistance is littler than single tube situation, and this just need raise the transmitted power when sending data.For specific pipe network system, when using underground piping and ground, carry out on-the-spot test, to determine the transmitted power of terminal as communication media.
Claims (1)
1, a kind of pipeline communication system, this system comprises the front-end processor that is connected on communication media one end, the terminating machine that is connected on the communication media other end, it is characterized in that: the communication media that is connected between front-end processor and the terminating machine is a pipeline, pipe ends has and is embedded in underground earth point greater than 15 meters and constitutes ground wire, and the two ends of pipeline are connected with terminating machine with front-end processor respectively with the ground wire at two ends; Front-end processor and terminating machine include digital port and analog port; The digital port of front-end processor is connected with the digital device port of Control Room, and the digital port of terminating machine is connected with each communication equipment mouth of producing the field, station; The analog port of front-end processor and terminating machine is taken over road and ground wire; Front-end processor and terminating machine include amplitude limiting amplifier circuit, filter circuit, selective frequency amplifier circuit, automatic gain control circuit, demodulator circuit, shaping amplification circuit, analog quantity electronic switch, digital quantity electronic switch, power amplifier, modulation circuit, carrier frequency generation circuit, transmitting-receiving control circuit; The information that analog quantity electronic switch input is sent here through pipeline and the earth receiving pipeline on the one hand, send the modulation signal that amplifies through power amplifier to pipeline on the other hand, modulation signal is by carrier frequency generation circuit, shaping amplification circuit control, receive and send by the control of transmitting-receiving control circuit, the information that receives from pipeline is through amplitude limiting amplifier circuit, filter circuit, selective frequency amplifier circuit, automatic gain control circuit, demodulator circuit, after shaping amplification circuit is handled respectively, send into digital quantity electronic switch input, the digital quantity electronic switch receives the order or the information of external control device, divide two-way with the order of external control device or information after by the shaping amplification circuit shaping, one tunnel control transmitting-receiving control circuit is opened the analog quantity electronic switch and is used for sending digital signal, another route modulation circuit to pipeline, carrier frequency generation circuit, power amplifier is handled by the analog quantity electronic switch and is sent order or information to pipeline; Ground connection resistance requires less than 3 Ω; Pipeline communication system front end machine and terminating machine all have two port D mouth digital ports and A mouth analog port, and the D mouth of front-end processor connects the computer data port of SCADA system or DCS system, and the D mouth of terminating machine connects the digital port of on-the-spot RTU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031345565A CN100474788C (en) | 2003-08-28 | 2003-08-28 | Pipeline communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031345565A CN100474788C (en) | 2003-08-28 | 2003-08-28 | Pipeline communication method |
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| Publication Number | Publication Date |
|---|---|
| CN1592138A CN1592138A (en) | 2005-03-09 |
| CN100474788C true CN100474788C (en) | 2009-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031345565A Expired - Fee Related CN100474788C (en) | 2003-08-28 | 2003-08-28 | Pipeline communication method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394703A (en) * | 2011-11-23 | 2012-03-28 | 太原海斯特电子有限公司 | Inductive communication method used in tunnel of coal mine |
| CN103763004A (en) * | 2014-01-27 | 2014-04-30 | 青岛雅合阴保工程技术有限公司 | Method and system for conducting communication by means of submarine pipeline |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365552A (en) * | 1999-04-08 | 2002-08-21 | 霍尼韦尔国际公司 | Method and apparatus for data communication with an underground instrument package |
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2003
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365552A (en) * | 1999-04-08 | 2002-08-21 | 霍尼韦尔国际公司 | Method and apparatus for data communication with an underground instrument package |
Non-Patent Citations (4)
| Title |
|---|
| SCADA系统在鲁宁输油管线上的应用. 周明，许永忠.自动化仪表，第24卷第7期. 2003 |
| SCADA系统在鲁宁输油管线上的应用. 周明，许永忠.自动化仪表，第24卷第7期. 2003 * |
| 天然气管道SCADA系统的实施. 张乐长.天然气与石油，第20卷第1期. 2002 |
| 天然气管道SCADA系统的实施. 张乐长.天然气与石油，第20卷第1期. 2002 * |
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| CN1592138A (en) | 2005-03-09 |
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