CN101951279A - Power line carrier communication method for oil field underground testing and adjusting equipment - Google Patents
Power line carrier communication method for oil field underground testing and adjusting equipment Download PDFInfo
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- CN101951279A CN101951279A CN2010102779623A CN201010277962A CN101951279A CN 101951279 A CN101951279 A CN 101951279A CN 2010102779623 A CN2010102779623 A CN 2010102779623A CN 201010277962 A CN201010277962 A CN 201010277962A CN 101951279 A CN101951279 A CN 101951279A
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Abstract
The invention aims to solve the problems of unavailable real-time reading of underground working parameters and data by oil field underground testing and adjusting equipment, excessively complex operation, low efficiency and the like, provides a power line carrier communication method for the oil field underground testing and adjusting equipment and aims to transmit the acquired working parameters of a water well and an oil well to the ground in a digital mode through a power line when an underground testing and adjusting instrument runs under the well, control the operation of an underground instrument and meet the requirements of the real-time monitoring, adjustment and control of the working situations of the water well and the oil well in an oil field. The method is characterized in that: power carrier communication technology is combined with frequency shift keying (FSK) modulation and demodulation technology; a high-voltage direct current power line (voltage magnitude is between 90 and 190 V) which connects a ground control instrument with the underground testing and adjusting instrument is taken as a transmission medium; and a double-frequency FSK carrier modulation and demodulation mode for bearing binary 1 and 0 by two frequencies is adopted so as to realize real-time communication between the ground control instrument and the underground testing and adjusting instrument.
Description
Technical field
The present invention relates to a kind of carrier communication method, particularly a kind of power line carrier communication means that is used for oil field downhole measurement adjusting equipment.
Technical background
In the Petroleum Production field,, need monitor and regulated and control accordingly running parameters such as the flow of down-hole, pressure, temperature for production efficiency and the production safety that guarantees the oil field.
At present, downhole measurement adjusting equipment in oil field generally is divided into two kinds of extracting methods to the data that collect:
A kind of is the memory-type monitoring, specific practice is that survey accent equipment is put into the down-hole, utilize MCU in the equipment with the data of gathering by memory stores, to survey accent equipment then and mention the aboveground data read of carrying out, analyze the downhole flow Changing Pattern, will survey accent equipment again and put into the down-hole and regulate and control, this method can't realize the underground work parameter is monitored in real time, fail safe is relatively poor, and complex operation, inefficiency;
Another kind is to utilize power line to power and transfer of data, specific practice is the Ground Control instrument with the continuous impulse of certain frequency as a kind of instruction, be loaded into power supply signal and upload to downhole measurement adjusting instrument, downhole measurement adjusting instrument is loaded into sensing data accordingly to be passed ground back or flow is regulated and control on the power supply signal.Though this method can realize the transfer of data of downhole measurement adjusting instrument and Ground Control instrument, solve the memory-type monitoring and needed the problem of put-on and delegated instrument repeatedly, but owing to can only read a kind of data (flow, pressure, temperature etc.) at every turn, therefore slow to the reading speed of downhole data, and the circuit that the pulse signal that adopts is easy to be subjected in the transfer of data disturbs, and causes the data wrong report.
Summary of the invention
The present invention can't read, operate problems such as too loaded down with trivial details, inefficiency to underground work parameter and data in real time in order to solve above-mentioned oil field downhole measurement adjusting equipment, a kind of power line carrier communication means that is used for oil field downhole measurement adjusting equipment is provided, purpose is to make downhole measurement adjusting instrument when underground work, the well that collects, the running parameter of oil well can be transferred to ground by power line with digital form, control the work of downhole instrument simultaneously, satisfy real-time monitoring and regulation and control oil field well, oil well working condition.It is characterized in that: the power supply carrier communication is combined with the frequency shift keying modulation-demodulation technique, (voltage magnitude 90V～190V) is a transmission medium with the high-voltage DC power supply line that connects Ground Control instrument and downhole measurement adjusting instrument, adopt the double frequency FSK carrier modulation demodulation mode of two frequency carrying binary ones and 0, realize the real time communication of Ground Control instrument and downhole measurement adjusting instrument.
Described Ground Control instrument comprises DC power supply, is the motor power supply of downhole measurement adjusting instrument by cable;
Described Ground Control instrument and downhole measurement adjusting instrument all contain the MCU micro-control unit;
Described MCU micro-control unit generates the digital signal data frame, and the reception of control data, transmission;
Described digital signal data frame is determined by communication protocol, comprises length, information type, initiation feature sign indicating number form, the end condition code form of fsk data frame, check code type etc., and wherein: described Frame length is used in reference to the byte number sum of the bright information content; Described information type is used for indicating the attribute of the current data frame information content, and information type such as comprises inquiry, is provided with and replys at type, can expand according to actual needs; Described initial code form is used to judge whether the Frame into required reception, guarantees the correct transmission of header data.Described end condition code is used to guarantee the reliable transmission of Frame tail data.Described check code is used to check the correctness of this digital frame, and the present invention adopts exclusive or check.
Described Ground Control instrument and downhole measurement adjusting instrument all include Data Receiving unit and data transmission unit;
The Data Receiving unit of described Ground Control instrument is connected with transmitting element with the Data Receiving unit of downhole measurement adjusting instrument by service cable with transmitting element;
Described data transmission unit includes FSK modulation module, power amplifier module and signal coupling module, the digital signal data frame that needs among the MCU to send is modulated into the different sine wave signal of frequency by the FSK modulation module, logical one=1300 ± 4Hz wherein, logical zero=2100 ± 4Hz.The fsk data signal is loaded on the power line by the signal coupling module after carrying out power amplification by power amplifier module again, is transferred to the other side's Data Receiving unit by power line;
Described Data Receiving unit pack contains FSK demodulation module, signal coupling module and pre-amplifying module, the signal that receives is isolated direct current signal by the signal coupling module, the fsk signal of separating is amplified into the FSK demodulation module by pre-amplifying module and decodes, and is demodulated to the discernible corresponding high-low level signal of MCU;
The reception of described data, transmission are by the MCU micro-control unit controls, at first downhole measurement adjusting instrument according to certain time interval constantly earthward controller send downhole data, the MCU micro-control unit controls that sends behind the Frame by the down-hole enters accepting state, in this time interval, the Ground Control instrument is sent to ground data in the downhole measurement adjusting instrument by ground MCU micro-control unit controls.
The present invention is a transmission medium with the high-voltage DC power supply line to the downhole measurement adjusting instrument power supply, need not establish telecommunication cable in addition, greatly reduce cost, in carrier wave power supply power and power line attenuation characteristic, there is not the restriction of load and transmission range, the direct communication distance is up to 5000m, and transmission rate can reach 1200bit/s.The digital signal data frame that adopts can a plurality of data of disposable transmission, and reading speed is fast, can be real-time the various running parameters in down-hole are monitored.And the FSK modulation demodulation system that adopts sinusoidal signal can effectively avoid impulsive noise that earth magnetism ground, down-hole electricity and other high pressure power consumption equipments are produced to the influence that signal transmits, and has reliable anti-interference, more is applicable to the strong noise environment of down-hole complexity.
Description of drawings
Fig. 1 is the communication block diagram of downhole measurement adjusting equipment.
Fig. 2 is the composition frame chart of data transmission unit and Data Receiving unit.
Embodiment
Also the present invention is described in further detail in conjunction with the accompanying drawings below by concrete example.
This example mainly comprises Ground Control instrument 1 and downhole measurement adjusting instrument 2 as shown in Figure 1, and the DC power supply 5 in the Ground Control instrument 1 is motor 11 power supplies of downhole measurement adjusting instrument by power line 3.Ground Control instrument 1 comprises MCU micro-control unit 4, data transmission unit 6, Data Receiving unit 7; Downhole measurement adjusting instrument 2 comprises MCU micro-control unit 8, data transmission unit 9, Data Receiving unit 10.The data transmission unit 6,9 of Ground Control instrument 1 and downhole measurement adjusting instrument 2 is formed by fsk data modulation module 12, power amplifier module 13, signal coupling module 14 as shown in Figure 2; The Data Receiving unit 7,10 of Ground Control instrument 1 and downhole measurement adjusting instrument 2 is formed by fsk data demodulation module 15, pre-amplifying module 16, signal coupling module 17 as shown in Figure 2.
The course of work of each module is described:
(1) sets up communication protocol, in communication protocol, determine length, information type, initiation feature sign indicating number form, the end condition code form of digital signal data frame at least, check code type etc.
(2) data transmission unit: by an end MCU micro-control unit (4,8) control, and after sending " sending order ", data transmission unit (6,9) enters the data transmit status immediately.In the MCU micro-control unit (4,8) data of required transmission according to agreement predetermined data frame format framing after, by fsk data modulation module 12 digital signal is modulated into the different sine wave signal of frequency, digital signal logical one=1300 ± 4Hz wherein, logical zero=2100 ± 4Hz.Sine wave signal after the modulation is loaded on the power supply signal by signal coupling module 14 after amplifying by power amplifier module 13, is transferred to the Data Receiving unit (10,7) of the other end by power line;
(3) Data Receiving unit: by an end MCU micro-control unit (4,8) control, and after sending " receiving order ", Data Receiving unit (7,10) enter data receiving state immediately.The modulated signal that transmits by power line is through extraction, the filtering of signal coupling module 17, send into fsk data demodulation module 15 after the amplification of pre-amplifying module 16, demodulation module is demodulated to the discernible corresponding high-low level signal of MCU with the sine wave signal of importing and sends into MCU, and MCU can separate frame, processing to the valid data that receive then.
(4) the MCU micro-control unit 8 of downhole measurement adjusting instrument is at first formed the digital signal data frame with the sensing data that collects according to the agreement of formulating, send downhole data earthward according to certain time interval, MCU micro-control unit 8 controls that send behind the Frame by the down-hole enter accepting state, in this time interval, Ground Control instrument 1 is sent to ground data in the downhole measurement adjusting instrument 2 by 4 controls of ground MCU micro-control unit, and the order data that the MCU in the downhole measurement adjusting instrument 2 sends according to ground controller 1 is set Data Receiving, the sending mode of down-hole.
Claims (2)
1. power line carrier communication means that is used for oil field downhole measurement adjusting equipment, it is characterized in that: the power supply carrier communication is combined with the frequency shift keying modulation-demodulation technique, (voltage magnitude 90V～150V) is a transmission medium with the high-voltage DC power supply line that connects Ground Control instrument and downhole measurement adjusting instrument, adopt the double frequency FSK carrier modulation demodulation mode of two frequency carrying binary ones and 0, realize the real time communication of Ground Control instrument and downhole measurement adjusting instrument.
Described Ground Control instrument comprises DC power supply, is the motor power supply of downhole measurement adjusting instrument by cable;
Described Ground Control instrument and downhole measurement adjusting instrument all contain the MCU micro-control unit;
Described MCU micro-control unit generates the digital signal data frame, and the reception of control data, transmission;
Described digital signal data frame is determined by communication protocol, comprises length, information type, initiation feature sign indicating number form, the end condition code form of fsk data frame, check code type etc.
Described Ground Control instrument and downhole measurement adjusting instrument all include Data Receiving unit and data transmission unit;
The Data Receiving unit of described Ground Control instrument is connected with transmitting element with the Data Receiving unit of downhole measurement adjusting instrument by service cable with transmitting element;
Described data transmission unit includes FSK modulation module, power amplifier module and signal coupling module, the digital signal data frame that needs among the MCU to send is modulated into the different sine wave signal of frequency by the FSK modulation module, logical one=1300 ± 4Hz wherein, logical zero=2100 ± 4Hz.The fsk data signal is loaded on the power line by the signal coupling module after carrying out power amplification by power amplifier module again, is transferred to the other side's Data Receiving unit by power line;
Described Data Receiving unit pack contains FSK demodulation module, signal coupling module and pre-amplifying module, the signal that receives is isolated direct current signal by the signal coupling module, the fsk signal of separating is amplified into the FSK demodulation module by pre-amplifying module and decodes, and is demodulated to the discernible corresponding high-low level signal of MCU;
The reception of described data, transmission are by the MCU micro-control unit controls, at first downhole measurement adjusting instrument according to certain time interval constantly earthward controller send downhole data, the MCU micro-control unit controls that sends behind the Frame by the down-hole enters accepting state, in this time interval, the Ground Control instrument is sent to ground data in the downhole measurement adjusting instrument by ground MCU micro-control unit controls.
2. a kind of power line carrier communication means that is used for oil field downhole measurement adjusting equipment according to claim 1, wherein: described Frame length is used in reference to the byte number sum of the bright information content; Described information type is used for indicating the attribute of the current data frame information content, and information type such as comprises inquiry, is provided with and replys at type, can expand according to actual needs; Described initial code form is used to judge whether the Frame into required reception, guarantees the correct transmission of header data.Described end condition code is used to guarantee the reliable transmission of Frame tail data.Described check code is used to check the correctness of this digital frame, and the present invention adopts exclusive or check.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102779623A CN101951279A (en) | 2010-09-10 | 2010-09-10 | Power line carrier communication method for oil field underground testing and adjusting equipment |
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| CN2010102779623A CN101951279A (en) | 2010-09-10 | 2010-09-10 | Power line carrier communication method for oil field underground testing and adjusting equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103929217A (en) * | 2014-05-05 | 2014-07-16 | 阳光电源股份有限公司 | Direct-current power line carrier communication transceiver, transmitter and receiver |
| CN104793248A (en) * | 2015-04-16 | 2015-07-22 | 中国海洋石油总公司 | Power supply and communication integrated circuit device |
| CN105991493A (en) * | 2015-02-03 | 2016-10-05 | 核工业北京地质研究院 | EFSK technology-based single-core communication device and communication method |
| CN109495137A (en) * | 2019-01-15 | 2019-03-19 | 广东志成冠军集团有限公司 | A kind of the signal coupled system and method for subsea DC power transmission cable |
| CN109660282A (en) * | 2018-12-24 | 2019-04-19 | 深圳先进技术研究院 | A kind of communication device and communication means of power interface |
| CN110290085A (en) * | 2019-08-14 | 2019-09-27 | 中国人民解放军国防科技大学 | Data ferrying method and system based on network isolation condition |
| CN113014290A (en) * | 2020-07-31 | 2021-06-22 | 拓小拓科技(天津)有限公司 | Underground bidirectional communication system based on direct current carrier |
| CN113037316A (en) * | 2020-06-30 | 2021-06-25 | 天津师范大学 | Underground power supply communication signal receiving and transmitting system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103929217A (en) * | 2014-05-05 | 2014-07-16 | 阳光电源股份有限公司 | Direct-current power line carrier communication transceiver, transmitter and receiver |
| CN105991493A (en) * | 2015-02-03 | 2016-10-05 | 核工业北京地质研究院 | EFSK technology-based single-core communication device and communication method |
| CN104793248A (en) * | 2015-04-16 | 2015-07-22 | 中国海洋石油总公司 | Power supply and communication integrated circuit device |
| CN104793248B (en) * | 2015-04-16 | 2018-02-09 | 中国海洋石油总公司 | One kind power supply and communicating integral circuit arrangement |
| CN109660282B (en) * | 2018-12-24 | 2023-10-03 | 深圳先进技术研究院 | Communication device and communication method of power interface |
| CN109660282A (en) * | 2018-12-24 | 2019-04-19 | 深圳先进技术研究院 | A kind of communication device and communication means of power interface |
| CN109495137A (en) * | 2019-01-15 | 2019-03-19 | 广东志成冠军集团有限公司 | A kind of the signal coupled system and method for subsea DC power transmission cable |
| WO2020147192A1 (en) * | 2019-01-15 | 2020-07-23 | 广东志成冠军集团有限公司 | Cable signal coupling system and method |
| CN109495137B (en) * | 2019-01-15 | 2023-12-01 | 广东志成冠军集团有限公司 | Signal coupling system and method for submarine direct-current power transmission cable |
| CN110290085A (en) * | 2019-08-14 | 2019-09-27 | 中国人民解放军国防科技大学 | Data ferrying method and system based on network isolation condition |
| CN113037316A (en) * | 2020-06-30 | 2021-06-25 | 天津师范大学 | Underground power supply communication signal receiving and transmitting system |
| CN113014290B (en) * | 2020-07-31 | 2023-04-21 | 拓小拓科技(天津)有限公司 | Downhole two-way communication system based on direct current carrier |
| CN113014290A (en) * | 2020-07-31 | 2021-06-22 | 拓小拓科技(天津)有限公司 | Underground bidirectional communication system based on direct current carrier |
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Address after: 130031 No. 20, Heshun four, two district, Jilin, Changchun Applicant after: Changchun Ruili Technology Co., Ltd. Address before: 130022 Jilin province Changchun Nanguan District, Yatai Street No. 3218 room 2202 International Building Tonghua A Applicant before: Changchun Ruili Technology Co., Ltd. |
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Application publication date: 20110119 |