CN103147745B - A kind of three-dimensional acoustic wave log data high-speed transfer device based on LVDS technology - Google Patents
A kind of three-dimensional acoustic wave log data high-speed transfer device based on LVDS technology Download PDFInfo
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Abstract
The invention discloses a kind of three-dimensional acoustic wave log data high-speed transfer device based on LVDS technology, first ground control system issues control command, keyset receives order by LAN mouth, and by passing to control panel under Mcbsp interface and multichannel buffer serial port, then use LVDS interfacing to realize the high speed serial transmission of control command and three-dimensional velocity logging sonic data.LVDS communication interface technique carries out data transmission by extremely low voltage swing in the mode of high-speed-differential, there is low noise, good common mode inhibition capacity, low-power consumption and circuit can be integrated into inside system-level IC, thus overcome three-dimensional acoustic wave logging data transmission system distance, electric circuit in well working environment is complicated, and three-dimensional acoustic wave logging signal is easily subject to the problem of external interference, can complete the high-speed transfer of data between control panel and collection plate real-time and accurately.
Description
Technical field
The invention belongs to logging signal high speed transmission technology field, more specifically say, relate to a kind of be adapted at working in the high-temperature severe environment of down-hole based on LVDS(Low-VoltageDifferentialSignaling) the three-dimensional acoustic wave log data high-speed transfer device of technology, for the high-speed transfer of data between control panel and collection plate in three-dimensional acoustic wave well logging.
Background technology
Three-dimensional acoustic wave well logging is the acoustic logging of new generation grown up in cross-dipole acoustic logging technical foundation, its measuring principle utilizes acoustic measurement patterns all at present and one pole, dipole and Stoneley wave, to the waveform of various frequency band carry out composite measurement with obtain the three-dimensional acoustic wave characteristic on stratum and compressional wave time difference, shear wave and Stoneley wave at pit shaft axially, radial and circumferential change, the directionality of formation characteristic provides complete description.
The acoustic signals of special frequency band is just measured in traditional acoustic logging, and the data volume of measurement is less, and therefore the transmission means of low speed just can meet the requirement to data transmission bauds.And three-dimensional acoustic wave log measurement data volume is very huge, low speed transmissions is adopted to be difficult to meet the requirement of measuring real-time.
Summary of the invention
The object of the invention is to overcome three-dimensional acoustic wave log data amount large, the defect of serious external interference is subject in downhole transmitted, a kind of three-dimensional acoustic wave log data high-speed transfer device based on LVDS technology is provided, to realize, when image data amount is large and external interference is serious, completing the high-speed transfer of data between control panel and collection plate real-time and accurately.
For realizing above object, the present invention is based on the three-dimensional acoustic wave log data high-speed transfer device of LVDS technology, it is characterized in that, comprise LVDS clock receiver corresponding to keyset, control panel, LVDS data collector, LVDS clock transmitter, 13 pieces of collection plates and each collection plate and LVDS data collector;
Ground control system issues control command to keyset by logging cable, and keyset receives order by LAN interface, and by passing to control panel under Mcbsp interface and multichannel buffer serial port;
Down-hole main control module is included, order sending module, data reception module in control panel; The order that down-hole main control module sends for receiving ground control system, and make parsing, thus logging system inerrably carries out in order under control well, the three-dimensional acoustic wave log data received from collection plate is uploaded to keyset by Mcbsp interface and multichannel buffer serial port simultaneously, then uploads to ground control system again by LAN interface, logging cable; Down-hole main control module is resolved the order obtained and is sent in LVDS serial transmission bus by LVDS data collector by order sending module, collection plate is sent to again by LVDS serial transmission bus, to control the parameters such as the gain factor of the sample rate of collection plate, sampling number, sampling precision, work schedule and signal conditioning circuit, order sending module produces guides online clock and sends to data reception module simultaneously, and send to collection plate by LVDS clock transmitter simultaneously, make control panel and collection plate communication synchronization; Data reception module receives accurately to the three-dimensional acoustic wave log data that 13 pieces of collection plates are sended over by LVDS serial transmission bus, and be stored in corresponding memory, then, the three-dimensional acoustic wave log data stored in memory is sent to ground control system by Mcbsp interface by down-hole main control module;
13 pieces of collection plates, include order receiver module, ADC control module, ADC converter, 8 road signal conditioning circuit and data transmission blocks in every block collection plate; Order receiver module is received the guides online clock from control panel by LVDS clock receiver, and benchmark communication clock receives the order that control panel in LVDS serial transmission bus sends, and order is sent to ADC control module; ADC control module, according to the order received, is configured the gain factor of signal conditioning circuit, and the sample rate of control ADC converter, sampling number, sampling precision and work schedule; 8 road signal conditioning circuits nurse one's health rear feeding ADC converter to the three-dimensional acoustic wave logging signal that receiving transducer obtains, the work schedule that ADC converter is determined according to ADC control module, carries out sampling to 8 road three-dimensional acoustic wave logging signals and obtains three-dimensional acoustic wave log data;
The three-dimensional acoustic wave log data that ADC converter obtains by data transmission blocks is carried out processing and is sent in LVDS serial transmission bus by LVDS data collector, then sends to control panel.
The object of the present invention is achieved like this:
Three-dimensional acoustic wave logging instrument every block collection plate in real work needs the acoustic signals of collection 8 passage, 13 pieces of collection plates need altogether the signal of collection 104 passage, therefore log data amount is very large, and need real time high-speed to transmit, this is the difficult problem that acoustic logging is not in the past encountered.The present invention is based on the three-dimensional acoustic wave log data high-speed transfer device of LVDS technology, first ground control system issues control command, keyset receives order by LAN mouth, and by passing to control panel under Mcbsp interface, then use LVDS interfacing to realize the high speed serial transmission of control command and three-dimensional acoustic wave log data.LVDS communication interface technique carries out data transmission by extremely low voltage swing in the mode of high-speed-differential, there is low noise, good common mode inhibition capacity, low-power consumption and circuit can be integrated into inside system-level IC, thus overcome three-dimensional acoustic wave logging data transmission system distance, electric circuit in well working environment is complicated, and three-dimensional acoustic wave logging signal is easily subject to the problem of external interference, can complete the high-speed transfer of data between control panel and collection plate real-time and accurately.
Accompanying drawing explanation
Fig. 1 is three-dimensional acoustic wave tool configuration schematic diagram;
Fig. 2 is the theory diagram of a kind of detailed description of the invention of three-dimensional acoustic wave log data high-speed transfer device that the present invention is based on LVDS technology;
Fig. 3 is the theory diagram of a kind of detailed description of the invention of the part of control panel shown in Fig. 2;
Fig. 4 is the theory diagram of the module of collection plate shown in Fig. 2 detailed description of the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these are described in and will be left in the basket here.
Fig. 1 is three-dimensional acoustic wave tool configuration schematic diagram.
As shown in Figure 1, three-dimensional acoustic wave logging instrument has three unipolar emissive transducers and acoustic signals launched by two orthogonal dipole emission transducers, adopts the receiving array of 13 groups of receiving transducer R1-R13 to receive acoustic signals.Wherein three monopole transmitters, be respectively one pole, lower monopole and unipolar emissive transducer far away, upper unipolar emissive transducer and lower monopole transmitting transducer are distributed in the two ends of receiving array, and unipolar emissive transducer far away and X, Y dipole emission transducer are positioned at three-dimensional acoustic wave logging instrument bottom distance receiving array remotely.Three unipolar emissive transducers are for generation of the compressional wave of different spacing, shear wave and Stoneley wave, and the orthogonal dipole transmitting transducer of X, Y, for generation of bending wave, can obtain required various modes Wave data by different integrated modes.13 pieces of collection plates are positioned at receiving array place, are connected respectively with 13 groups of receiving transducer R1-R13, and control panel is positioned at unipolar emissive transducer end a distance, are connected by LVDS serial transmission bus by control panel with 13 pieces of collection plates.
In the present embodiment, as shown in Figure 3, control panel part comprises keyset 1, control panel 2, LVDS data collector 3, LVDS clock transmitter 4, and control panel 2 includes down-hole main control module 201, order sending module 202, data reception module 203, wherein static RAM (SRAM) is the memory of down-hole main control module 201.
Ground control system issues control command to keyset 1 by logging cable, and keyset 1 receives order by LAN interface, and by passing to control panel 2 under Mcbsp interface and multichannel buffer serial port.
In the present embodiment, down-hole main control module 201 is realized by DSP.DSP receives ground control system by Mcbsp interface and sends control command by keyset 1, makes and resolves and send order sending module 202 to; Secondly, after three-dimensional acoustic wave log data receives, ground control system is uploaded to by this Mcbsp interface.
In the present embodiment, the down-hole main control module 201 in control panel 2 is realized by DSP, and order sending module 202 and data reception module 203 realize by FPGA.As shown in Figure 2, order sending module 202 first sends reset signal RST to collection plate, down-hole main control module 201 to be received and the 16bit control command parsed carries out the conversion of 16 to 8 thereupon, then carry out 8B/10B coding and obtain 10bit coded command, the order data of serial is obtained through parallel-serial conversion, then Low Voltage Differential Signal is changed into by LVDS data collector 3, be sent on LVDS serial transmission bus D-H1, D-L1 and data wire, final order sending module 202 sends collection signal ACQ triggering collection plate again and starts collecting work.
Data reception module 203 receives and passes the serial three-dimensional acoustic wave log data of coming from LVDS data collector 3, multiple phase over-sampling method is adopted to recover serial three-dimensional acoustic wave log data, then carry out the three-dimensional acoustic wave log data that serioparallel exchange obtains 10bit, then to the three-dimensional acoustic wave log data of 10bit carry out 8B/10B decoding obtain 8bit three-dimensional acoustic wave log data and according to regulation communication protocol disassemble refitting restore original three-dimensional acoustic wave log data.
As shown in Figure 2,3, digital dock manager is included in order sending module 202, send to data reception module 203 for generation of guides online clock, send to collection plate by LVDS clock transmitter 4, clock line C-H1, C-L1 simultaneously, make control panel and collection plate communication synchronization.
In the present embodiment, the functions such as FPGA adopts the product of Xilinx company Spartan3E series, the logic control that FPGA will complete, 8B/10B encoding and decoding, date restoring adopt VerilogHDL hardware description language to realize, and development platform is ISE13.2.LVDS interface chip adopts the DS90LV019 of NS company, is the TMS320F2812 of TI company with the main control chip DSP of ground communications.
In the present embodiment, as shown in Figure 3, order receiver module 701, ADC control module 702, ADC converter 703,8 road signal conditioning circuit 704 and data transmission blocks 705 is included in every block collection plate; Order receiver module 701 is received the guides online clock from control panel by LVDS clock receiver 5, benchmark communication clock receives the order that control panel in LVDS serial transmission bus sends, and order is sent to ADC control module 702; ADC control module 702, according to the order received, is configured 8 road signal conditioning circuits 704, and the work schedule of control ADC converter 703; The three-dimensional acoustic wave logging signal that 8 road signal conditioning circuit 704 pairs receiving transducers obtain nurses one's health rear feeding ADC converter 703, the work schedule that ADC converter 703 is determined according to ADC control module 702, carries out sampling to 8 road three-dimensional acoustic wave logging signals and obtains three-dimensional acoustic wave log data;
The three-dimensional acoustic wave log data that ADC converter 703 obtains by data transmission blocks 705 is carried out processing and is sent in LVDS serial transmission bus by LVDS data collector 6, then sends to control panel.
In the present embodiment, as shown in Figure 2,4, order receiver module 701 first receives reset signal RST and resets to whole collection plate; Then according to the control command received, sample rate, sampling number, sampling precision, work schedule and signal conditioning circuit gain factor etc. are configured; When collection signal ACQ is effective, starts ADC converter and three-dimensional acoustic wave logging signal is gathered and exists in data transmission blocks 705; The three-dimensional acoustic wave log data be stored in data transmission blocks 705 is carried out packing encapsulation according to the communication protocol of regulation simultaneously, then encode through 8B/10B, parallel-serial conversion exports serial data, eventually passes LVDS data collector 6 and converts Low Voltage Differential Signal to and be sent in LVDS serial transmission bus.
In the present embodiment, collection plate part adopts the product of Xilinx company Spartan3E series equally, the logic control that FPGA completes, 8B/10B encoding and decoding, the functions such as serial data recovery adopt VerilogHDL hardware description language to realize, and development platform is ISE13.2.LVDS interface chip adopts the DS90LV019 of NS company, adopts the high precision analogue conversion chip ADS1278 with 8 passages sampling functions simultaneously of TI simultaneously.
The three-dimensional acoustic wave log data high-speed transfer device that the present invention is based on LVDS technology has the following advantages:
1, LVDS interfacing is used to realize the high speed serial transmission of three-dimensional velocity logging sonic data.Three-dimensional acoustic wave logging instrument every block collection plate in real work needs the acoustic signals of collection 8 passage, 13 pieces of collection plates need altogether the signal of collection 104 passage, therefore log data amount is very large, and need real time high-speed to transmit, this is the difficult problem that acoustic logging is not in the past encountered.And long distance for data, electric circuit in well working environment is complicated, and signal is easily subject to external interference.LVDS communication interface technique solves this difficult problem very well, its technological core carries out data transmission by extremely low voltage swing in the mode of high-speed-differential, have low noise, good common mode inhibition capacity, low-power consumption and circuit can be integrated into inside system-level IC.
2, use 8B/10B coding techniques realizes the coding to sending data.In three-dimensional acoustic wave logging data transmission system device, employing be high-speed serial data transmission means.Adopt the coding techniques of 8B/10B can ensure there are enough signal conversions in data flow, namely in data flow, continuous print 1 or 0 will, more than 5, make receiving terminal normally to recover data; Secondly owing to adopting LVDS technology, require that DC component is as far as possible little, and 8B/10B there is DC compensation function, namely As time goes on can not occur direct current offset in link; Having 8B/10B to encode again is encode by specific rule, can detect the error message occurred in transmitting procedure according to these rules; 8B/10B coding also specify some Special controlling codes simultaneously, can be used as synchronization character and midamble code etc.
Although be described the illustrative detailed description of the invention of the present invention above; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of detailed description of the invention; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.
Claims (1)
1. the three-dimensional acoustic wave log data high-speed transfer device based on LVDS technology, it is characterized in that, comprise the 2nd LVDS clock receiver corresponding to keyset, control panel, a LVDS data collector, a LVDS clock transmitter, 13 pieces of collection plates and each collection plate and the 2nd LVDS data collector;
Ground control system issues control command to keyset by logging cable, and keyset receives order by LAN interface, and by passing to control panel under Mcbsp interface and multichannel buffer serial port;
Down-hole main control module is included, order sending module, data reception module in control panel; The order that down-hole main control module sends for receiving ground control system, and make parsing, thus logging system inerrably carries out in order under control well, the three-dimensional acoustic wave log data received from collection plate is uploaded to keyset by Mcbsp interface and multichannel buffer serial port simultaneously, then uploads to ground control system again by LAN interface, logging cable; Down-hole main control module is resolved the order obtained and is sent in LVDS serial transmission bus by a LVDS data collector by order sending module, collection plate is sent to again by the 2nd LVDS data collector, to control the gain factor of the sample rate of collection plate, sampling number, sampling precision, work schedule and signal conditioning circuit, order sending module produces guides online clock and sends to data reception module simultaneously, and send to collection plate by a LVDS clock transmitter simultaneously, make control panel and collection plate communication synchronization; Data reception module receives accurately to the three-dimensional acoustic wave log data that 13 pieces of collection plates are sended over by LVDS serial transmission bus, and be stored in corresponding memory, then, the three-dimensional acoustic wave log data stored in memory is sent to keyset by Mcbsp interface by down-hole main control module, then is sent to ground control system by LAN interface, logging cable;
13 pieces of collection plates, include order receiver module, ADC control module, ADC converter, 8 road signal conditioning circuit and data transmission blocks in every block collection plate; Order receiver module is received the guides online clock from control panel by the 2nd LVDS clock receiver, and benchmark communication clock receives the order that control panel in LVDS serial transmission bus sends, and order is sent to ADC control module; ADC control module, according to the order received, is configured the gain factor of signal conditioning circuit, and the sample rate of control ADC converter, sampling number, sampling precision and work schedule; 8 road signal conditioning circuits nurse one's health rear feeding ADC converter to the three-dimensional acoustic wave logging signal that receiving transducer obtains, the work schedule that ADC converter is determined according to ADC control module, carries out sampling to 8 road three-dimensional acoustic wave logging signals and obtains three-dimensional acoustic wave log data;
The three-dimensional acoustic wave log data that ADC converter obtains by data transmission blocks is carried out processing and is sent in LVDS serial transmission bus by the 2nd LVDS data collector, then sends to control panel;
The down-hole main control module of described control panel is realized by DSP, and order sending module and data reception module realize by FPGA; Order sending module first sends reset signal RST to collection plate, down-hole main control module to be received and the 16bit control command parsed carries out the conversion of 16 to 8 thereupon, then carry out 8B/10B coding and obtain 10bit coded command, the order data of serial is obtained through parallel-serial conversion, then Low Voltage Differential Signal is converted to by a LVDS data collector, be sent in LVDS serial transmission bus, final order sending module sends collection signal ACQ triggering collection plate and starts collecting work;
Data reception module then receives and passes the serial three-dimensional acoustic wave log data of coming from the 2nd LVDS data collector, multiple phase over-sampling method is adopted to recover serial three-dimensional acoustic wave log data, then carry out the three-dimensional acoustic wave log data that serioparallel exchange obtains 10bit, then to the three-dimensional acoustic wave log data of 10bit carry out 8B/10B decoding obtain 8bit three-dimensional acoustic wave log data and according to regulation communication protocol disassemble refitting restore original three-dimensional acoustic wave log data;
The order receiver module of collection plate first receives reset signal RST and resets to whole collection plate; Then according to the control command received, sample rate, sampling number, sampling precision, work schedule and signal conditioning circuit gain factor are configured; When collection signal ACQ is effective, starts ADC converter and three-dimensional acoustic wave logging signal is gathered and exists in data transmission blocks; The three-dimensional acoustic wave log data be stored in data transmission blocks is carried out packing encapsulation according to the communication protocol of regulation simultaneously, then encode through 8B/10B, parallel-serial conversion exports serial data, eventually passes the 2nd LVDS data collector and converts Low Voltage Differential Signal to and be sent in LVDS serial transmission bus.
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| WO2015161431A1 (en) * | 2014-04-22 | 2015-10-29 | 京微雅格（北京）科技有限公司 | Lvds data recovering method and circuit |
| CN106160994B (en) * | 2016-06-28 | 2019-04-02 | 电子科技大学 | A kind of three-dimensional acoustic wave log data motor synchronizing transmitting device based on blind over-sampling |
| CN107288624A (en) * | 2017-07-28 | 2017-10-24 | 电子科技大学 | A kind of underground high speed data bus device suitable for acoustic logging instrument |
| CN109117276A (en) * | 2018-08-31 | 2019-01-01 | 湖南率为控制科技有限公司 | Acoustic logging instrument data processing system and its data processing method |
| CN110295891B (en) * | 2019-05-22 | 2023-02-10 | 中国石油天然气集团有限公司 | Longitudinal wave downhole gain self-adaptive control system and method for digital acoustic logging |
| CN112558926B (en) * | 2020-12-16 | 2024-05-17 | 扬州海科电子科技有限公司 | Multi-parameter adjustable high-speed pseudo-random code driving source device |
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