CN2924672Y - Pulse coding-decoding communication interface system with two-way data communication function - Google Patents
Pulse coding-decoding communication interface system with two-way data communication function Download PDFInfo
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- CN2924672Y CN2924672Y CN 200620026427 CN200620026427U CN2924672Y CN 2924672 Y CN2924672 Y CN 2924672Y CN 200620026427 CN200620026427 CN 200620026427 CN 200620026427 U CN200620026427 U CN 200620026427U CN 2924672 Y CN2924672 Y CN 2924672Y
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Abstract
The utility model provides a pulse coding and decoding communication interface system with the function of two-way data communication, which comprises a ground logging system and an underground logging instrument combination serial. The utility model is characterized in that the ground logging system comprises a host communication interface circuit of ground system, a ground single-chip microcomputer coding and decoding circuit, a ground coding signal driving circuit and a ground signal receiving shaping circuit. The underground logging instrument combination serial comprises an underground coding signal driving circuit, an underground signal receiving shaping circuit, a single-chip coding and decoding circuit, a data corresponding acquisition interface circuit and a plurality of logging instruments corresponding to the ground logging system. Compared with the prior art, the utility model has the advantages of improving the degree of intelligent and reliability of the petroleum logging, reducing the failure rate, simplifying the operation of the logging and enhancing the efficiency of the logging.
Description
Technical field
The utility model relates in the oil well logging field, uses the logging system of logging cable, particularly relates to the system that a kind of digital stratum information that the down-hole instrument is measured realizes communications.
Background technology
The digitizing technique of well logging information gets up from development abroad at first, and the transmission mode of commonplace employing is to carry out data transmission by the PCM3506 digital transmission interface.This transmission interface adopts the pulse code modulation (PCM) mode that well logging information is carried out the digital coding modulation, by after the sound wave logical triggering, log data is transferred to ground system then.But there is following weak point in the PCM3506 digital transmission interface:
1) the transmission information content is limited.PCM3506 directly gathers the measuring-signal of various downhole cartridges, owing to be subjected to the restriction of acquisition channel quantity, the data that can only gather 16 passages at most.Therefore, can not realize once going into the well and obtain full detail, influence logging efficiency.
2) intelligent degree is low.PCM3506 can only transmit data earthward, has only realized the one-way transmission of data, can not receive the instruction of ground system.Some operation (such as: the backup of scale, electrode before the well logging, wellbore gauging arm open with gathering etc.) also need ground system to realize for the down-hole instrument separately for different voltage by cable core, both increase the complicacy of operation, increased the complicacy of uphole equipment again.
3) interface circuit complexity.The PCM3506 interface circuit does not adopt single-chip microcomputer in design, realizes that by analog-and digital-logical circuit integrated level is poor, does not produce to be convenient to produce and debugging.
Owing to be subjected to the restriction of logging cable cable core quantity, and long cable is to the decay of signal, and the transmission of logging signal develops to the digitizing direction, has both realized combination logging, has guaranteed the authenticity of well logging information again.
The utility model content
The utility model is in order to solve above-mentioned existing in prior technology defective, and proposed a kind of bidirectional data communication function pulse encoding and decoding communication interface system that possesses, and utilizes intelligentized pulse code and decoding interface circuit, realizes data double-way communication.
A kind of pulse encoding and decoding communication interface system that possesses the bidirectional data communication function, comprise ground logging system and downhole logging instrument combination string, it is characterized in that, this ground logging system comprise ground system host communication interface circuit, ground single-chip microcomputer coding-decoding circuit, surface code signals driving circuit and ground received signal shaping circuit; This downhole logging instrument combination string comprises and the corresponding down-hole of ground logging system coded signal driving circuit, down-hole received signal shaping circuit, single-chip microcomputer coding-decoding circuit, data acquisition interface circuit, a plurality of well logger; Wherein:
Ground logging system is by ground single-chip microcomputer encoding and decoding interface circuit, and ground surface code signals driving circuit sends the reading of data order to the down-hole, data command sends downhole logging instrument to by logging cable, down-hole Single sheet machine coding-decoding circuit is gathered the well logging information of each down-hole instrument by the data acquisition interface circuit, sends ground system to after the encoded modulation; Be connected by logging cable between downhole logging instrument and the ground logging system, be used to realize data communication; Down-hole received signal shaping circuit is sent to down-hole single-chip microcomputer coding-decoding circuit with the NRZ signal that the bipolarity rz signal that receives is converted to TTL compatible, down-hole single-chip microcomputer coding-decoding circuit carries out decoding processing after receiving this signal, again by down-hole coded signal driving circuit, be reduced into the bipolarity rz signal, this signal is passed ground received signal shaping circuit back by logging cable; Ground received signal shaping circuit is converted to the NRZ signal of TTL compatible with the bipolarity rz signal that receives, as the instruction of passing ground system host communication interface circuit from the down-hole back.
Compared with prior art, the present invention, has simplified the Code And Decode circuit, and traffic rate can be set, better appropriate cable ground characteristic owing to adopted single-chip microcomputer in order to improve the performance of PCM3506 digital transmission interface.Its beneficial effect comprises: the intelligent degree that 1) has improved oil well logging.Owing to realized two-way communication, made that ground system can be at any time to down-hole instrument sending controling instruction; 2) improved the reliability of oil well logging.The encoding and decoding interface has adopted single-chip microcomputer, can realize the verification computing of communication data, has reduced the bit error rate, makes the more real formation information that reflects of measurement data.After adopting single-chip microcomputer, simplify the design of hardware circuit, improved integrated level, reduced failure rate; 3) improved logging efficiency.After having used this utility model, realize combination logging, once gone into the well and to measure the data of all down-hole instrument, and simplified logging operation.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Figure 2 shows that the synoptic diagram of a pulse code waveform of the present utility model.
Fig. 3 is the circuit theory diagrams of downhole logging instrument of the present utility model.
Fig. 4 is the circuit theory diagrams of ground logging system of the present utility model.
Embodiment
As shown in Figure 1, be applied to the theory diagram of oil well logging system for the utility model.Aboveground part is ground logging system A, comprises ground system host communication interface circuit 10; Ground single-chip microcomputer coding-decoding circuit 20A; Ground surface code signals driving circuit 30A and ground received signal shaping circuit 40A; The down-hole part is downhole logging instrument combination string B, between the ground logging system A of this part and aboveground part, realize data communication by logging cable C, comprise and corresponding ground of ground logging system A surface code signals driving circuit 30A, ground received signal shaping circuit 40A, single-chip microcomputer coding-decoding circuit 20A, RS485 bus interface circuit 50, and a plurality of well loggers, No. 1 well logger 60...... is until N well logger 70.Ground logging system A is by single-chip microcomputer encoding and decoding interface circuit 20A, and coded signal driving circuit 30A sends the reading of data order to the down-hole, data command sends downhole logging instrument (or downhole logging instrument combination string) to by logging cable C, down-hole received signal shaping circuit 30B is sent to down-hole single-chip microcomputer coding-decoding circuit 20B with the NRZ signal that the bipolarity rz signal that receives is converted to TTL compatible, after receiving this signal, down-hole single-chip microcomputer coding-decoding circuit 20B carries out decoding processing, again by down-hole coded signal driving circuit 30B, be reduced into the bipolarity rz signal, this signal is passed back aboveground by logging cable C, equally, ground received signal shaping circuit 30A is converted to the NRZ signal of TTL compatible with the bipolarity rz signal that receives, as the instruction of passing ground system host communication interface circuit from the down-hole back.In this process of data communication, if ground host sends to the instruction of other down-hole instrument, then single-chip microcomputer sends to instrument under the corresponding well by the RS485 bus interface with instruction.What down-hole encoding and decoding single-chip microcomputer received is the instruction that ground system sends to other down-hole instrument, then is transmitted to corresponding down-hole instrument by the RS485 bus interface.
In the single-chip microcomputer coding-decoding circuit, coded system adopts bipolarity rz coding mode, can eliminate the influence of cable distribution electric capacity like this.The coded system of transmitting order to lower levels and upstream data is identical.Be illustrated in figure 2 as the synoptic diagram of a pulse code waveform of the present utility model.The binary number of the pcm encoder waveform correspondence among the figure is: 11101100111110010011101110.As can be seen from the figure, the signal behind binary digital " 0 " coding is 0, accounts for 1 clock period; Signal behind binary numeral " 1 " coding is made up of two parts, respectively accounts for the clock period half, and preceding half period is " a positive level signal " or " negative level signal ", and back half period is " 0 level signal ".Level signal behind adjacent two binary digits " 1 " coding is a reversed polarity, therefore is defined as " bipolarity rz coding mode ".In order to decode synchronously, the first digit position that coding sends must be binary logic " 1 ".Decoding process is: the PCM signal of reception is earlier through shaping circuit, be converted to the TTL signal after, decode through single-chip microcomputer again.
Because it is asynchronous receiving and sending both sides, must by phase-locked operation realize receiving and send synchronously, for this reason, the function of digital PLL that adopted chip microcontroller: whenever receive a logical one, force take over party and transmit leg synchronous.
The data acquisition interface of downhole logging instrument combination string 7 adopts the RS485 interface bus that all down-hole instrument are linked together, and the single-chip microcomputer of coding-decoding circuit is gathered the well logging information of each down-hole instrument by the RS485 bus, sends ground system to after the encoded modulation.
Logging cable takies 2 cable cores as ground in the utility model and the data telecommunication line between the down-hole, normally cable core 2 and cable core 5.
The data communication flow process is as follows: the first step, and Host Command issues; The ground system main frame sends down-hole instrument instruction by communication interface (such as the RS485 communication bus interface), after ground encoding and decoding single-chip microcomputer receives, encoding process is carried out in instruction, and encoded again signal drive circuit is converted into the bipolarity rz signal, sends underground equipment to by logging cable.Down-hole received signal shaping circuit is converted to the bipolarity rz signal that receives the NRZ signal of TTL compatible, single-chip microcomputer carries out decoding processing after receiving this signal, be reduced into the instruction of ground host, if ground host sends to the instruction of other down-hole instrument, then single-chip microcomputer sends to instrument under the corresponding well by the RS485 bus interface with instruction.What down-hole encoding and decoding single-chip microcomputer received is the instruction that ground system sends to other down-hole instrument, then is transmitted to corresponding down-hole instrument by the RS485 bus interface.Second step, data upload; It is similar that data upload and Host Command issue process, and different is the transmission direction and the content of data.The data of uploading are that the single-chip microcomputer by the encoding and decoding communication interface circuit obtains from each down-hole instrument by the RS485 communication bus interface.
Below by accompanying drawing, further specify physical circuit solid line principle of the present utility model.As shown in Figure 3, the schematic diagram of downhole logging instrument combination string single-chip microcomputer encoding and decoding interface circuit 20B of the present utility model.The method of circuit function and realization thereof is as follows:
(1) decoding function: the order of ground host is through cable conductor 2,5 arriving signal coupling transformer T1; The circuit that is made of diode D2, D4 and resistance R 9, R10, R13 is used to reject the undesired signal that receives; The circuit that is made of operational amplifier U6, U7 and peripheral cell thereof has amplification and detection function, amplifies to received signal and the detection processing, converts the NRZ signal to, gives phase inverter U5 then, and received signal is converted to TTL standard N RZ signal.Received signal after the shaping is directly given single-chip microcomputer U2, and single-chip microcomputer U2 produces receive clock by inner timer, and each clock receives a data bit; Simultaneously, the input pin 5 of U2 has under the level interrupt function of jumping, every interruption once, the time value of adjustable primary receive clock, thus realized digital phase-locked function.U2 carries out the verification computing to the packet that receives, and the packet correct to verification makes an explanation, if ground system sends to the instruction of other down-hole instrument, U2 can send to corresponding down-hole instrument with instruction by RS485 Bus Interface Chip U1; If read the log data order, then U2 sends to ground system with log data.
(2) obtain log data: log data is that U2 obtains from each down-hole instrument by RS485 Bus Interface Chip U1.
(3) encoding function: encoding function is realized by single-chip microcomputer U2.U2 inner integrated timer and timing comparator can trigger the pin upset after timer and the comparer time coupling, thereby produce encoded clock, and encoded clock is exported from the 17th pin.In order to produce the bipolarity rz signal, U2 is from 11 and 18 two pin output datas, when pin 11 is logical one, when pin 18 is logical zero, can produces positive signal; Otherwise produce the negative polarity signal; When two pin output logic level are identical, produce 0 signal.At the negative edge of encoded clock, single-chip microcomputer U2 sends data, and at the rising edge of encoded clock, data are output to the output terminal of latch U3, and two signals that so can guarantee to deliver to the coded signal driving circuit are synchronous.
(4) coded signal drives: constituted the coded signal driving circuit by operational amplifier U4, triode Q1 and Q2 and peripheral cell, be used for drive signal coupling transformer T1, so that coded signal is sent to ground system.Owing to receive and sent same signal coupling transformer T1 shared, in order to eliminate transmitter driving circuit influence to received signal, sealed in two 2 volts stabilivolt Z1 and Z2 sending in the loop, the signal amplitude that receives with assurance is not less than 2 volts.
Fig. 4 is the schematic diagram of ground system of the present utility model " encoding and decoding interface circuit ".It is identical that its circuit function and downhole logging instrument combination are gone here and there, and therefore no longer is repeated in this description.
Claims (5)
1. pulse encoding and decoding communication interface system that possesses the bidirectional data communication function, comprise ground logging system and downhole logging instrument combination string, it is characterized in that, this ground logging system comprise ground system host communication interface circuit, ground single-chip microcomputer coding-decoding circuit, surface code signals driving circuit and ground received signal shaping circuit; This downhole logging instrument combination string comprises and the corresponding down-hole of ground logging system coded signal driving circuit, down-hole received signal shaping circuit, single-chip microcomputer coding-decoding circuit, data acquisition interface circuit, a plurality of well logger;
Ground logging system is by ground single-chip microcomputer encoding and decoding interface circuit, and ground surface code signals driving circuit sends the reading of data order to the down-hole, data command sends downhole logging instrument to by logging cable, down-hole single-chip microcomputer coding-decoding circuit is gathered the well logging information of each down-hole instrument by the data acquisition interface circuit, sends ground system to after the encoded modulation; Be connected by logging cable between downhole logging instrument and the ground logging system, be used to realize data communication; Down-hole received signal shaping circuit is sent to down-hole single-chip microcomputer coding-decoding circuit with the NRZ signal that the bipolarity rz signal that receives is converted to TTL compatible, down-hole single-chip microcomputer coding-decoding circuit carries out decoding processing after receiving this signal, again by down-hole coded signal driving circuit, be reduced into the bipolarity rz signal, this signal is passed ground received signal shaping circuit back by logging cable; Ground received signal shaping circuit is converted to the NRZ signal of TTL compatible with the bipolarity rz signal that receives, as the instruction of passing ground system host communication interface circuit from the down-hole back.
2. the pulse encoding and decoding communication interface system that possesses the bidirectional data communication function as claimed in claim 1 is characterized in that, in the single-chip microcomputer coding-decoding circuit, adopts polarity rz coding mode in transmitting order to lower levels and upstream data process.
3. the pulse encoding and decoding communication interface system that possesses the bidirectional data communication function as claimed in claim 1, it is characterized in that in the single-chip microcomputer coding-decoding circuit, the PCM signal that is received is earlier through shaping circuit, after being converted to the TTL signal, decode through single-chip microcomputer again.
4. the pulse encoding and decoding communication interface system that possesses the bidirectional data communication function as claimed in claim 1 is characterized in that, the data acquisition interface circuit in the downhole logging instrument combination string adopts the RS485 interface bus, and all down-hole instrument are linked together.
5. the pulse encoding and decoding communication interface system that possesses the bidirectional data communication function as claimed in claim 1 is characterized in that, logging cable adopts 2 cable cores.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200620026427 CN2924672Y (en) | 2006-06-14 | 2006-06-14 | Pulse coding-decoding communication interface system with two-way data communication function |
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| CN 200620026427 CN2924672Y (en) | 2006-06-14 | 2006-06-14 | Pulse coding-decoding communication interface system with two-way data communication function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510326A (en) * | 2011-12-15 | 2012-06-20 | 西安思坦仪器股份有限公司 | Full-duplex communication method based on single-core electric cables |
| CN104394054A (en) * | 2014-12-16 | 2015-03-04 | 镇江中煤电子有限公司 | Arborescence remote communication bus system |
| CN105933195A (en) * | 2016-04-27 | 2016-09-07 | 熊运轩 | Non-polar bus communication technique adopting PWM coding/decoding technology |
| CN112099108A (en) * | 2020-09-09 | 2020-12-18 | 中国海洋石油集团有限公司 | Connecting device of PLT instrument |
| CN112459769A (en) * | 2020-11-17 | 2021-03-09 | 中石化石油工程技术服务有限公司 | Storage type well logging system, method and application controlled by accelerometer signal coding and decoding |
-
2006
- 2006-06-14 CN CN 200620026427 patent/CN2924672Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510326A (en) * | 2011-12-15 | 2012-06-20 | 西安思坦仪器股份有限公司 | Full-duplex communication method based on single-core electric cables |
| CN104394054A (en) * | 2014-12-16 | 2015-03-04 | 镇江中煤电子有限公司 | Arborescence remote communication bus system |
| CN105933195A (en) * | 2016-04-27 | 2016-09-07 | 熊运轩 | Non-polar bus communication technique adopting PWM coding/decoding technology |
| CN112099108A (en) * | 2020-09-09 | 2020-12-18 | 中国海洋石油集团有限公司 | Connecting device of PLT instrument |
| CN112099108B (en) * | 2020-09-09 | 2024-04-09 | 中国海洋石油集团有限公司 | Connecting device of PLT instrument |
| CN112459769A (en) * | 2020-11-17 | 2021-03-09 | 中石化石油工程技术服务有限公司 | Storage type well logging system, method and application controlled by accelerometer signal coding and decoding |
| CN112459769B (en) * | 2020-11-17 | 2024-04-05 | 中石化石油工程技术服务有限公司 | Storage type logging system, method and application of accelerometer signal coding and decoding control |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070718 Termination date: 20110614 |