CN209129603U - A kind of logging cable high-speed data communications device - Google Patents
A kind of logging cable high-speed data communications device Download PDFInfo
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- CN209129603U CN209129603U CN201821858071.5U CN201821858071U CN209129603U CN 209129603 U CN209129603 U CN 209129603U CN 201821858071 U CN201821858071 U CN 201821858071U CN 209129603 U CN209129603 U CN 209129603U
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Abstract
The utility model discloses a kind of logging cable high-speed data communications devices of petroleum exploration field, including logging instrument data interface module, modulation /demodulation module, analog signal processing module, cable emulation signal driver module, signal transformer and power module；A kind of logging cable high-speed data communications device provided by the utility model realizes the function that downhole logging instruments carry out high-speed data communications by logging cable and ground system, communication speed can reach 1Mbps or more on 7000 meters of logging cables, 10/100M adaptive ethernet or CAN interface are used between the utility model and logger simultaneously, it is in consolidated network between ground system and downhole logging instrument, the access downhole logging instruments that ground system can be convenient, all network applications can use, and does not have to pass through which kind of transmission medium among consideration and used which kind of transmission method.
Description
Technical field
The utility model relates to oil exploration technology fields, and in particular to downhole logging instruments during a kind of oil exploration
By the technology for carrying out high-speed data communications between logging cable and ground system.
Background technique
Petroleum well logging technology is a key areas of petroleum industry technology, is widely used in exploration of oil and gas field and exploitation
Overall process, found for petroleum geology and engineers and technicians and evaluation oil-gas Layer provide important data and data.
With the development of oil-gas exploration and development and electronic technology, exploration engineering has entered array, imagingization exploration stage,
A large amount of underground acquisition data need real-time Transmission to ground, need matched high speed data transfer channel, complete ground
The high speed of mass data, real-time, accurate delivery, transmission rate seriously restrict exploration equipment skill between plane system and downhole instrument
The development and application of art.
Recently as deepening continuously for oil and gas development, it is difficult to the low-quality reservoir effectively exploited and mud stone oil, page in the past
The exploitation of the unconventional oil and gas such as rock gas is taken seriously, and horizontal well development becomes it and mainly seeks production mode, forms a large amount of horizontal well
The service markets such as well logging, Fracturing Monitoring.There is an urgent need to high speeds in long-time horizontal wellbore logging, the application of high sampling rate Fracturing Monitoring
Cable communication device.This high speed cable communication device is exactly the high speed communication in order to solve the prospecting instrument of long-time hot environment
Problem enables to be applied in the service such as high temperature prospect pit, horizontal wellbore logging and Fracturing Monitoring, proposes shelves upgrading for whole system
Play key effect.
Utility model content
The technical issues of solution
Aiming at the problem that existing background is proposed, the utility model provides a kind of logging cable high-speed data communications dress
It sets.
Technical solution
In order to achieve the above object, the utility model is achieved by the following technical programs:
A kind of logging cable high-speed data communications device, including
Logging instrument data interface module carries out data exchange with logger；
Cable signal digital quantity after analog-to-digital conversion is reduced into truthful data, will need to send out by modulation /demodulation module
The data encoding being sent on cable is converted into analog quantity at data flow and by digital-to-analogue chip；
Analog signal processing module carries out bandpass filtering to the analog signal on cable, and signal amplifies, at modulus sampling
Reason；
Cable emulation signal driver module will be exported via the modulation /demodulation module and the analog signal processing module
Analog signal carry out power amplification to adapt to the decaying of logging cable；
The analog signal for carrying out power amplification is coupled on logging cable by signal transformer；
Power module generates the logging instrument data interface module, modulation /demodulation module, data sharing module, simulation letter
Various DC voltages needed for number processing module, cable emulation signal driver module and signal transformer work.
Further, include dsp processor in the modulation /demodulation module and use DSL modulation and demodulation algorithm, make
Data communication rate on 7000 meters of logging cables reaches 1Mbps or more.
Further, the dsp processor adjusts transmission rate according to length and the characteristic dynamic of logging cable, so that
The transmission rate of the logging cable is optimal state.
Further, it uses between the modulation /demodulation module and the logging instrument data interface module using FPGA as core
The data sharing module of the heart exchanges data.
Further, the logging instrument data interface module uses the multiplex roles circuit using high speed ARM as core, including
Ethernet interface and CAN interface.
Further, the Ethernet interface of the logging instrument data interface module uses Ethernet data Signal Transparent Transmission Technology,
All Ethernet datas can by the logging instrument data interface module upload or under pass.
Beneficial effect
It is had the following beneficial effects: compared with known publicly-owned technology using technical solution provided by the utility model
The utility model realizes downhole logging instruments and carries out high-speed data communications by logging cable and ground system
Function, communication speed can reach 1Mbps or more on 7000 meters of logging cables, while use between the utility model and logger
10/100M adaptive ethernet or CAN interface are the ground in consolidated network between ground system and downhole logging instrument
The access downhole logging instruments that system can be convenient, all network applications can use, and not have to consider intermediate by what
It plants transmission medium and has used which kind of transmission method.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the composition schematic diagram of the utility model；
Fig. 2 is the utility model logging cable modulation and demodulation method schematic diagram；
Fig. 3 is FPGA built-in function and external connection relational graph in the utility model data sharing module.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, it is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
The utility model is further described below with reference to embodiment.
In conjunction with Fig. 1: a kind of logging cable high-speed data communications device, including logging instrument data interface module, modulation /demodulation
Module, analog signal processing module, cable emulation signal driver module, signal transformer, power module.
Modulation /demodulation module includes two core devices of dsp processor and FPGA.Dsp processor working frequency is up to
400MHz or more, dsp processor part mainly complete the modulation /demodulation of data flow, carry out the function of data exchange with FPGA.It is excellent
Selection of land, dsp processor and FPGA use DSL modulation and demodulation algorithm to the modulation /demodulation of data flow, modulation and demodulation algorithm use from
Discrete multi-tune technology (DMT) technology of dissipating, is one of the implementation of multi-carrier transmission scheme, its modulation and demodulation are difference
It is realized based on IFFT and FFT, is a kind of multi-carrier transmission scheme that implementation complexity is minimum, most widely used.
The present invention is designed using full duplex frequency division communications mode, using QAM modulation method, according to cable properties benefit when application
Uplink and downlink communication transfer is carried out with its 4KHz to 300KHz frequency band, 4KHz to 300KHz frequency band is divided into multiple subchannels, is examined
Consider the practical application request that downlink data amount is small, upstream data amount is big, small part low frequency subchannel is transmitted for transmitting order to lower levels,
Remaining most of subchannel is for uploading data transmission.
In the test process of initialization, modulation /demodulation module analyzes communication, determines the channel used and is used for
The frequency of data transmission, selects optimal transmission channel by calculating the signal-to-noise ratio (SNR) of each channel, has lower SNR
Channel be dropped and do not use.Based on these information, modulation /demodulation module also calculates the bit number that each channel is sent.It is preferred that
Ground, in the implementation, channel quality are related with cable length and cable quality.
Preferably, with RS (Reed-Solomon) coding for realizing DSL in FPGA, RS coding is a kind of with relatively strong
The important linear block codes of one of the multi-system Bose-Chaudhuri-Hocquenghem Code of error correcting capability and error control domain can both correct random
Mistake, and burst error can be corrected.RS coder is widely used in communication and storage system, solves data in high-speed memory
The problem of reliability.
Preferably, as shown in figure 3, the bus of one DSP of FPGA interior design, in FPGA piece/piece outer mold piece between use
Dsp bus accesses, in piece/piece outer mold piece includes data exchange buffering for swapping with upper end data, and it can be complete
At the data exchange between the upload data of the transmitting order to lower levels of front end and reception and demodulation.RS coding, RS are used in data communication
Encoded control module is completed to realize these functions with FPGA to sending data and receiving the forward error correction coding and decoding processing of data
The reliability of data transmission not only can be improved, and execution efficiency is high, data throughout is big.
Further, using the in-built RAM electricity of FPGA between modulation /demodulation module and logging instrument data interface module
Road carries out data sharing and exchange data.There are two 16 BITBUS network interfaces, modulation /demodulation module and logging instrument data for RAM circuit tool
Interface module connects the two bus interface respectively, and can access the memory space of RAM completely.Modulation /demodulation module and well logging
Instrument data interface module will need the data exchanged according to each customized space in the agreement write-in RAM set, and operate RAM
Specified register to generate a hardware pulse, for notifying another party to have new data, another party receives this pulse for the pulse
After read particular register, and the new data of RAM is read according to agreement.It is modulation /demodulation module and logging instrument with the advantages of this programme
Data interface module respectively works independently, and exchange data are independent of each other, and work efficiency is high, will not generate timing conflict.
Further, logging instrument data interface module uses using high speed arm processor as core and realizes that Ethernet, CAN are total
Line interface.When preferably, using Ethernet interface, realize Ethernet data transparent transmission function, i.e., no matter logger end ether
Network interface can be communicated using which kind of application layer protocol by the present apparatus and ground system, be ground using the advantages of this scheme
It is in consolidated network between system and downhole logging instrument, the access downhole logging instruments that ground system can be convenient are all
Network application can use, and do not have to pass through which kind of transmission medium among consideration and used which kind of transmission method.
The utility model realizes that downhole logging instruments carry out the function of high-speed data communications by logging cable and ground system
Can, communication speed can reach 1Mbps or more on 7000 meters of logging cables, while use between the utility model and logger
10/100M adaptive ethernet or CAN interface are the ground in consolidated network between ground system and downhole logging instrument
The access downhole logging instruments that system can be convenient, all network applications can use, and not have to consider intermediate by what
It plants transmission medium and which kind of transmission method has been used, the present apparatus can continue working under 175 DEG C of environment.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the utility model
In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples
In can be combined in any suitable manner.
The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, does not limit the specific embodiment of the utility model yet.Obviously, according in this specification
Hold, can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain this reality
With novel principle and practical application, so that skilled artisan be enable to better understand and utilize this practical new
Type.The utility model is limited only by the claims and their full scope and equivalents.
Claims (6)
1. a kind of logging cable high-speed data communications device, it is characterised in that: including
Logging instrument data interface module carries out data exchange with logger；
Cable signal digital quantity after analog-to-digital conversion is reduced into truthful data by modulation /demodulation module, sends needs to
Data encoding on cable is converted into analog quantity at data flow and by digital-to-analogue chip；
Analog signal processing module carries out bandpass filtering, signal amplification, modulus sampling processing to the analog signal on cable；
Cable emulation signal driver module, will be via the mould of the modulation /demodulation module and analog signal processing module output
Quasi- signal carries out power amplification to adapt to the decaying of logging cable；
The analog signal for carrying out power amplification is coupled on logging cable by signal transformer；
Power module, generate the logging instrument data interface module, modulation /demodulation module, data sharing module, at analog signal
Manage the various DC power supplies needed for module, cable emulation signal driver module and signal transformer work.
2. a kind of logging cable high-speed data communications device according to claim 1, it is characterised in that: the modulation /demodulation
Include dsp processor in module and uses DSL modulation and demodulation algorithm.
3. a kind of logging cable high-speed data communications device according to claim 2, it is characterised in that: the DSP processing
Device adjusts transmission rate according to length and the characteristic dynamic of logging cable, so that the transmission rate of the logging cable is optimal
State.
4. a kind of logging cable high-speed data communications device according to claim 1, it is characterised in that: the modulation /demodulation
It is used between module and the logging instrument data interface module and exchanges data by the data sharing module of core of FPGA.
5. a kind of logging cable high-speed data communications device according to claim 1, it is characterised in that: the logging instrument number
The multiplex roles circuit using high speed ARM as core, including Ethernet interface and CAN interface are used according to interface module.
6. a kind of logging cable high-speed data communications device according to claim 5, it is characterised in that: the logging instrument number
Ethernet data Signal Transparent Transmission Technology is used according to the Ethernet interface of interface module, all Ethernet datas can pass through the logging instrument
Data interface module upload or under pass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821858071.5U CN209129603U (en) | 2018-11-12 | 2018-11-12 | A kind of logging cable high-speed data communications device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821858071.5U CN209129603U (en) | 2018-11-12 | 2018-11-12 | A kind of logging cable high-speed data communications device |
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| CN209129603U true CN209129603U (en) | 2019-07-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441436A (en) * | 2018-11-12 | 2019-03-08 | 连云港杰瑞自动化有限公司 | A kind of logging cable high-speed data communications device |
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2018
- 2018-11-12 CN CN201821858071.5U patent/CN209129603U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441436A (en) * | 2018-11-12 | 2019-03-08 | 连云港杰瑞自动化有限公司 | A kind of logging cable high-speed data communications device |
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