CN201196088Y - High-speed data transmission apparatus used for petroleum logging - Google Patents

High-speed data transmission apparatus used for petroleum logging Download PDF

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Publication number
CN201196088Y
CN201196088Y CNU2008200806766U CN200820080676U CN201196088Y CN 201196088 Y CN201196088 Y CN 201196088Y CN U2008200806766 U CNU2008200806766 U CN U2008200806766U CN 200820080676 U CN200820080676 U CN 200820080676U CN 201196088 Y CN201196088 Y CN 201196088Y
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China
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downhole
interface
cofdm
end
modulation
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CNU2008200806766U
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Chinese (zh)
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伍瑞卿
艺 张
张菊茜
群 李
谦 李
伟 陈
顾庆水
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中国海洋石油总公司;中海油田服务股份有限公司
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Priority to CNU2008200806766U priority Critical patent/CN201196088Y/en
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Publication of CN201196088Y publication Critical patent/CN201196088Y/en

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Abstract

The utility model discloses a high speed data transmission device for oil well logging, comprising a ground part and an underground part, wherein the ground part comprises a ground terminal, a ground terminal interface, a ground encode orthogonal frequency division multiplex COFDM modem and a ground cable interface which are connected in turn, the underground part comprises an underground instrument, an underground instrument interface, an underground COFDM modem and an underground cable interface which are connected in turn, and the ground cable interface is connected with the underground cable interface via an oil well logging cable. The high speed data transmission device can improve data transmission bit rate of oil well logging cables.

Description

用于石油测井的高速数据传输装置 Means for high speed data transmission in oil well logging

技术领域 FIELD

本实用新型涉及一种石油测井技术,具体说,涉及一种用于石油测井的高速数据传输装置。 The present invention relates to an oil well logging technology, particularly, it relates to an apparatus for high speed data transmission in oil well logging.

背景技术 Background technique

一般测井系统包括地面设备和井下仪器,井下仪器与地面设备之间的数据通信通常采用电缆作为传输^?某介,电缆的井下一端连接井下各种仪器,电缆另一端(即地面一端)连接地面的各种设备。 Logging system generally includes a data communication between the surface equipment and downhole equipment, downhole equipment and surface equipment is generally employed as a transmission cable ^? A dielectric, connected to the downhole end of the cable downhole various instruments, the other end of the cable (i.e., the ground end) connector ground equipment. 在测井系统中,井下仪器主要用于测量地层的各种数据参数和信号,如地层的泥浆电阻率、井下电视成像信号等,随着现代测井的要求越来越高,需测的地层的各种内容将会越来 In well logging systems, downhole equipment is mainly used for measuring formation data parameters and signals, such as mud resistivity of the formation, downhole video image signal or the like, with the increasing requirements of modern logging, need to measure formation the variety of content will increasingly

越多;地面设备主要用于将接收到的地层的各种信号进行存储、分析、打印等工作,以获取该地层的特征。 More; ground equipment mainly for various strata of the received signal storage, analysis, printing, etc., to obtain the characteristics of the formation. 井下仪器需要将采集得到的数据通过测井电缆传输到地面设备,同时地面设备也会通过测井电缆发送一些命令或数据去控制井下仪器完成相应的工作,为此,在井下仪器与地面i殳备之间必须有一个传输装置以实现井下仪器与地面设备之间的数据通信,同时该传输装置的井下部分也需要提供一些接口用于与井下各仪器的连接。 Downhole equipment requirements, collected data obtained through the logging cable to the ground transmission apparatus, while the ground equipment also transmits some commands or data via wireline to control the downhole tools to complete the work, for this purpose, in the downhole tool and surface i Shu there must be a means to enable data transmission communication between downhole tools and surface equipment between the devices, while the transmission portion of the downhole apparatus also need to provide some connection interface for each of the downhole instrument.

国外公司在测井传输方面做了大量的研究,六十年代以前基本上釆用调频、调幅等模拟调制方式传输少量的数据。 Foreign companies have done a lot of research in logging transmission, essentially preclude the transfer small amounts of data with FM, AM and other analog modulation before 1960s. 例如,阿特拉斯公司在八十年代中期研制成代号为3502的PCM (Pulse Code Modulation,脉沖编码调制)调制器,传输速率仅为7.5kbps。 For example, in the mid-eighties Atlas code is developed into a PCM 3502 (Pulse Code Modulation, Pulse Code Modulation) modulator, a transmission rate is only 7.5kbps. 之后,该^^司的调制解调技术开始采用曼彻斯特编码方式,传输速率提高到93.35 kbps (型号为WTC3510)。 Thereafter, the modem technology ^^ Division started using the Manchester encoding method, increase the transmission rate to 93.35 kbps (model WTC3510). 斯伦贝谢公司一直采用相移键控(Phase Shift Keying,简称PSK)调制方式传输数据。 Schlumberger been using phase shift keying (Phase Shift Keying, referred to as PSK) modulation scheme for transmitting data. 八十年代中期以前,研制出CCS和CTS两种型号的数字传输短节,其中CCS 的传输速率为80kbps, CTS的传输速率为100kbps。 Before the mid-eighties, CCS and CTS developed two models of digital transmission short section, where the transmission rate CCS is 80kbps, CTS transmission rate is 100kbps. CCS与CTS均采用BPSK (Binary Phase Shift Keying, 二进制相移键:控)调制技术。 CCS and CTS are used BPSK (Binary Phase Shift Keying, Binary Phase Shift Key: control) modulation techniques. 九十年代初研制出 Early nineties developed

型号为MAX-500的成像测井系统,"MAX-500"中的"500"代表它的遥传系统数据上行传输速率可达500kb/s。 Model MAX-500 imaging logging system, "MAX-500" in "500" represents that the uplink telemetry system data transfer rate up to 500kb / s. 斯伦贝谢公司的遥传系统称为DTS数字遥传系统,采用QAM (Quadrature Amplitude Modulation,正交幅度调制) 技术,可达到500kbps的数据传输速率,基本上能够满足成像测仪器信息量传输的需要。 Schlumberger telemetry system called DTS digital telemetry system using QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) technique, can achieve a data transfer rate of 500kbps, the test meter can basically meet the imaging information transmitted need. 在哈里伯顿公司推出的成像测井系统EXCELL-2000中,其遥传系统(型号为DITS)采用调制的二进制码传输,上传速率为217.6kbps。 In Release imaging Halliburton Logging EXCELL-2000 system in which telemetry system (model of DITS) modulated binary code transmission, uploading rate of 217.6kbps. 贝克-阿特拉斯公司推出的型号为ECLIPS-2000的成像测并系统中,其遥传系统(型号为WTC)采用曼彻斯特码传输,上传速率为230kbps。 Baker - Atlas launch ECLIPS-2000 model for imaging and measuring system, which telemetry system (Model WTC) using Manchester code transmission, uploading rate is 230kbps. 随着现代测井的要求越来越高,需测内容越来越多,现在的测井系统的传输码率无法达到要求。 With the increasingly high demands of modern logging, we need to measure more and more content, the transmission rate of the current logging system can not meet the requirements.

另外,现有的井下仪器对外接口不完全一致,如哈里伯顿公司的测井系统的井下仪器主要采用以太网的同轴电缆的方式进行连接,贝克-阿特拉斯公司推出的成像测井系统主要采用1553总线的方式进行连接。 Further, conventional downhole not exactly the same external interface, such as logging system Halliburton downhole tool main Ethernet coaxial cable connection manner, Baker - Atlas launch imaging logging 1553 system mainly uses way connection. 不同的井下仪器接口造成在同一种传输电缆中无法进行互联,给实际的工作带来不便。 Downhole tools create different interfaces in the same transmission cable can not be connected, to the actual work inconvenience.

实用新型内容 SUMMARY

本实用新型要解决的技术问题是提供一种用于石油测井的高速数据传输装置,能够在测井电缆上大幅度提高数据传输码率。 The present invention to solve the technical problem of providing a high-speed data transmission apparatus used in oil well logging, can significantly improve the data transmission rate over a logging cable.

为了解决上述问题,本实用新型提供了一种用于石油测井的高速数据传输装置,包括:地面部分和井下部分,所述地面部分各个结构依次相连接, 包括:地面终端、地面终端接口、地面编码正交频分多^各复用COFDM调制解调器、地面线缆接口;所述井下部分各个结构依次相连接,包括:井下仪器、井下〗义器接口、井下COFDM调制解调器、井下线缆接口;所述地面线缆接口和井下线缆接口通过测井电缆相连接。 To solve the above problems, the present invention provides a high speed data transmission for oil well logging apparatus, comprising: a surface portion and a downhole portion, said surface portion of each structure are connected in sequence, comprising: a ground terminal, the ground terminal interface, ground coded orthogonal frequency division multiplexing multiple ^ each COFDM modems, cable interface surface; the downhole portion of each structure are connected in sequence, comprising: a downhole tool, a downhole interface〗 Yi, COFDM downhole modem, a downhole cable interface; the and said ground cable interface connected to the interface via a cable downhole logging cable.

优选的,所述地面COFDM调制解调器包括:地面COFDM调制器和地面COFDM解调器;所述井下COFDM调制解调器包括:井下COFDM调制器和井下COFDM解调器。 Preferably, the ground COFDM modem comprising: a terrestrial COFDM terrestrial COFDM modulator and demodulator; COFDM said downhole modem comprising: a downhole downhole COFDM COFDM modulator and demodulator.

优选的,所述井下仪器接口包括:以太网接口电路模块、1553总线接口电路模块、CAN总线接口电路模块或者模拟信号电路转换模块;以及,可编 Preferably, the downhole instrument interface comprising: Ethernet interface module, bus interface circuit 1553 module, CAN bus interface circuit or analog circuit block conversion module; and a programmable

程逻辑器件、数字信号处理器DSP、井下仪器接口端非易失性存储器Flash 和静态随机存储器SRAM;所述以太网接口电路模块、1553总线接口电路模块、控制器局域网CAN总线接口电路模块或者模拟信号电路转换模块和所述可编程逻辑器件相连接,所述DSP分别与所述可编程逻辑器件、井下仪器接口端Flash和静态随机存储器SRAM和井下COFDM调制解调器相连接。 Programmable logic device, the DSP digital signal processor, the downhole tool interface end nonvolatile memory Flash and the SRAM static random access memory; the Ethernet interface module, a module bus interface circuit 1553, a controller area network CAN bus interface circuit module or analog signal converting circuit module and said programmable logic device is connected to the DSP are connected to the programmable logic device, and a downhole instrument interface end Flash and SRAM static random access memory COFDM downhole modem.

优选的,所述井下仪器接口采集的数椐通过所述1553总线接口电路模块、CAN总线接口电路模块或者模拟信号电路转换模块传输到可编程逻辑器件,所述可编程逻辑器件打包送至所述DSP。 Preferably, the downhole tools noted in the number acquired by the interface 1553 of the bus interface circuit module, CAN bus interface circuit converting circuit module, or module to transmit an analog signal to a programmable logic device, the programmable logic device to said packing DSP.

优选的,所述井下仪器接口和地面终端接口之间釆用TCP/IP协议的方式传送数据;所述井下部分采用TCP/IP协议的方式将采集到的数据传输回所述地面部分,所述地面部分采用TCP/IP协议的方式向井下部分发送命令。 Preferably, the data transfer mode Bian TCP / IP protocol and the interface between downhole tools ground terminal interface; the downhole portion using TCP / IP protocol manner the collected data back to said ground portion, said the ground segment using TCP / IP protocol to send commands to the downhole portion.

优选的,所述井下COFDM调制器包括:井下调制端DSP、井下调制端Flash、调制端数据转换器、数才莫转换器、调制端可编程增益;^i大器PGA、井下调制端滤波器、调制端PGA控制电路;所述井下调制端DSP接收井下仪器采集的数据进行COFDM调制后发送至所述调制端数据转换器,所述调制端数据转换器按照所述数一莫转换器的采样频率将所述l史据送至所述数模转换器,所述数模转换器进行数模变换后输出模拟信号,所述模拟信号在所述井下调制端DSP和调制端PGA控制电路的控制下通过所述调制端PGA进行;j文大并输出至所述井下线缆接口的井下调制端滤波器,所述井下调制端滤波器滤波后送至所述井下线缆接口的调制信号驱动电路,所述调制信号驱动电路经过驱动后送至所述测井电缆。 Preferably, the downhole COFDM modulator comprising: a modulation downhole end of the DSP, the downhole end of the Flash modulated, the modulated side data converter, a digital converter only Mo, modulation of programmable gain; ^ i amplifier PGA, modulated downhole end of the filter , the modulation of the PGA control circuit; said data modulated downhole end a downhole DSP instrument acquires received COFDM modulation after the modulation to the transmitting end of the data converter, the data converter according to a modulation terminal of said digital converter samples a Mo the frequency according to the history of the l digital-analog converter for digital-analog converting the output analog signal, said analog control signal modulator DSP and a modulation terminal of the PGA in the downhole control circuit under modulation by the end PGA; j and outputs the packets to the large modulation downhole end a downhole cable interface of the filter, the downhole end of the filter filters the modulated signal supplied to the modulating drive circuit of the downhole cable interface, the modulation signal supplied to the drive circuit after driving the logging cable.

优选的,所述井下部分的井下线缆接口包括:调制信号驱动电路和井下变压器,所述调制信号驱动电路和井下变压器之间连接有匹配电阻;所述调制信号驱动电路和所述井下调制端滤波器相连接。 Preferably, the downhole portion of the downhole cable interface comprises: a modulation signal and a downhole transformer drive circuit, the resistance matching between the signal modulated with the driving circuit and the transformer is connected downhole; driving circuit and said modulation signal modulating the downhole end the filter is connected.

优选的,所述井下COFDM解调器包括:井下解调端数字信号处理器DSP、井下解调端Flash、解调端数据转换器、才莫数转换器、解调端PGA、井下解调端滤波器、解调端PGA控制电路、抑制井下调制端信号的电鴻4莫块; 所述井下线缆接口的输出信号至所述测井电缆和抑制井下调制端信号的电路模块,所述抑制井下调制端信号的电路模块对所述COFDM调制器输出至测井电缆的信号进行抑制后送到所述井下解调端滤波器进行滤波,滤波后的信 Preferably, the COFDM demodulator downhole comprising: a downhole end of demodulating the DSP digital signal processor, the downhole end of the Flash demodulation, demodulated data converter end only MO-digital converter, demodulates the end PGA, demodulation downhole end filter, demodulation circuit control terminals of the PGA, suppress electrical downhole end of the modulated signal block hung 4 Mo; an output signal of the interface cable to the downhole wireline and the downhole suppression circuit module ends modulated signal, the suppression the circuit module downhole to the modulated signal after the end of the COFDM modulator output signal to suppress the wireline downhole end filter to filter the demodulated, filtered letter

号送到所述解调端PGA,所述解调端PGA在所述井下解调端DSP和解调端PGA控制电路的控制下对滤波后的信号进行放大,经过所述解调端PGA放大后送至所述模数转换器进行模数变换,在所述解调端数据转换器的控制下将所述才莫数转换器变换后的数字信号送至所述井下解调端DSP,所述井下解调端DSP将COFDM解调后的信号送至所述井下仪器接口。 No. PGA end to said demodulation, the demodulation of the PGA in the downhole end of a DSP and a demodulator demodulating the control terminal of the PGA amplifies the filtered signal at a control circuit, after the demodulation of the PGA amplification after analog to digital converter to said analog to digital conversion, the digital signal is supplied to only the number of MO demodulated downhole end of the DSP under the control of the converter converting the demodulated data converter terminal, the said downhole end of the DSP will COFDM demodulation of the demodulated signal to the downhole instrument interface.

优选的,所述井下COFDM调制器中的数;f莫转换器的釆样频率与所述井下COFDM解调器中的才莫数转换器的采样频率相同。 Preferably, the number of the COFDM modulator downhole; comp preclude the same frequency as the downhole COFDM demodulator converter f Mo in Mo only digital converter sampling frequency.

优选的,所述测井电缆采用铠装Camesa测井电缆。 Preferably, the use of armored wireline logging cable Camesa.

本实用新型可以在现有测井电缆上大幅度提高数据传输码率,以满足井下仪器的大数据量传输要求,例如,在7000米铠装Camesa测井电缆上能达到800kbps以上的传输速率,同时能够很容易地与不同接口的井下仪器连接。 The present invention can greatly improve the data transmission rate in the conventional wireline, downhole equipment to meet large data transmission requirements, for example, on a 7000 m Camesa armored logging cable can reach the transmission rate of 800kbps, At the same time it can be easily connected to the downhole tools different interfaces.

附图说明 BRIEF DESCRIPTION

图1是本实用新型中用于石油测井的高速数据传输装置的总体结构框 1 is an overall block configuration of the high speed data transmission apparatus according to the present invention are used in oil well logging

图; Figure;

图2是是本实用新型中井下仪器接口的内部结构框图; FIG 2 is a block diagram showing the internal structure of the downhole instrument interface in the present invention;

图3是本实用新型中COFDM调制器A、 COFDM解调器A以及井下线缆接口的内容实现框图。 FIG 3 is in the present invention A COFDM modulator, and a content A COFDM demodulator downhole cable interface of realization diagram.

具体实施方式 Detailed ways

下面参照附图,对本实用新型技术方案做详细说明。 The following detailed description of the technical solution of the present invention with reference to the accompanying drawings.

如图1所示,用于石油测井的高速数据传输装置的总体结构框图,用于石油测井的高速数据传输装置包括地面部分和井下部分,地面部分和井下部分通过测井电缆106连接,其中,地面部分各个结构依次相连接,地面部分包括:地面终端101 、地面终端接口102、 COFDM( Coded Orthogonal Frequency Division Multiplexing,编码正交频分多路复用)调制器B103、 COFDM解调器B104、地面线缆接口105;井下部分各个结构依次相连接,井下部分包括: As illustrated, a block diagram showing the overall structure of the high-speed data transmission for oil well logging apparatus, and high speed data transmission for oil well logging apparatus comprises a downhole portion and a surface portion, and a ground segment connected by a wireline downhole portion 1061, wherein the ground portion of each structure in turn is connected to the ground portion comprising: a ground terminal 101, ground terminal interface 102, COFDM (coded orthogonal frequency division multiplexing, coded orthogonal frequency division multiplexing) modulator B103, COFDM demodulator B104 ground cable interface 105; downhole portion of each structure in turn is connected to the downhole portion comprises:

井下仪器111、井下仪器接口110、 COFDM调制器A109、 COFDM解调器A108、井下线缆接口107。 111 downhole, the downhole instrument interface 110, COFDM modulator A109, COFDM demodulator A108, downhole cable interface 107.

地面终端101通过地面终端^:口102与COFDM调制器B103和COFDM 解调器B104相连,发送和接收数据。 Ground terminals 101 through the ground terminal ^: port 102 and COFDM modulator COFDM demodulator B103 and B104 are connected, data transmission and reception. 其中,COFDM调制器B103从地面终端接口102接收待发送数据,调制后通过地面电缆接口105承载在测井电缆106上发送至井下部分。 Wherein, B103 COFDM modulator receives data to be transmitted from the ground terminal interface 102, a cable interface 105 the modulated carrier transmitted over a wireline to the downhole portion 106 through the ground. COFDM解讽器B104通过地面电缆接口105接收井下部分承载在测井电缆106上的数据,经过解调后通过地面终端接口102发送给地面终端101。 Solutions Bitterness COFDM B104 105 receives control data on a portion of the downhole logging cable 106 is a cable interface carried through the ground, after demodulation to a ground terminal 101 via the ground terminal interface 102.

COFDM调制器B103和COFDM解调器B104可直接进行数据交互,可 COFDM modulator COFDM demodulator B103 and B104 can directly exchange data can be

调器B。 Adjuster B. ° 口"、' 、 ° mouth " ',

井下部分通过井下仪器接口110与COFDM调制器A109和COFDM解调器A108相连,发送和接收数据。 The downhole portion is connected to the downhole tool via the interface 110 and the COFDM modulator COFDM demodulator A109 and A108, the data transmission and reception. 其中,COFDM调制器A109从井下仪器接口110接收待发送数据,调制后通过井下电缆接口107承载在测井电缆106 上发送至地面部分;COFDM解调器A108通过井下电缆接口107接收地面部分承载在测井电缆106上的数据,经过解调后通过井下4义器接口110发送给井下仪器111。 Wherein, COFDM modulator A109 to be received from the downhole tool interface 110 transmits data modulated by the downhole cable interface 107 transmits the carrier to the surface portion on the wireline 106; COFDM demodulator A108 receives terrestrial section interface 107 via a cable downhole carried data on the logging cable 106, after demodulation to a downhole tool 111 downhole through 4 sense interface 110.

同样,COFDM调制器A109和COFDM解调器A108可直接进行数据交互,也可以将COFDM调制器A109和COFDM解调器A108合并称为COFDM 调制解调器A。 Similarly, COFDM modulator COFDM demodulator A109 and A108 can exchange data directly, but also COFDM modulator COFDM demodulator A109 and A108 may be referred to as a combined modem A. COFDM

测井电缆106通常采用铠装测井电缆,本实施例基于OFDM ( Orthogonal Frequency Division Multiplexing,正交频分复用)进4亍数才居传4命,所<吏用的OFDM系统参数根据铠装测井电缆信道的传输特性进行确定。 Logging cable 106 commonly used armored logging cable, according to the present embodiment is based on OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency-division multiplexing) into the right foot only 4 Number UN command transmission 4, the <officials OFDM system parameters used in armor means wireline transmission characteristics determined channel.

以7000米铠装测井电缆为例,根据电缆信道的传输特性可确定以下OFDM基本参数: To 7000 m armored logging cable, for example, may be determined according to the transmission characteristics of the cable channel OFDM following basic parameters:

(1 )子信道间隔:1.220703125 kHz。 (1) subchannel interval: 1.220703125 kHz.

(2 )子信道总数和FFT处理点数:256;从直流分量开始依次编号为0, 1,……,255。 (2) the total number of subchannels and the FFT processing points: 256; starting from the DC component are numbered 0, 1, ......, 255.

(3) 可用子信道总数:202个,其中,上行信道(UpLink,井下到地面) 包含的可用子信道总数:195个; Total (3) available subchannels: 202, wherein the total number of available subchannels upstream channel (UpLink, downhole to the surface) contains: 195;

(4) 下行信道(Down Link,地面到井下)包含的可用子信道总数:7个。 The total number of available sub-channels (4) downlink channel (Down Link, ground downhole) contains: 7.

(5) 有效符号时间:819.2us (5) the effective symbol time: 819.2us

(6) 保护间隔时间:204.8us (即:OFDM符号长度的1/4 ) (6) Protection interval: 204.8us (i.e.: OFDM symbol length 1/4)

(7) FFT处理带宽:312.5 kHz。 (7) FFT processing bandwidth: 312.5 kHz.

在该铠装测井电缆上,根据上述OFDM基本参数进行信道划分,其中, 子载波0-子载波5作为保留子栽波(不使用),不使用子载波0〜子载波5 的原因是避免低频端的交流供电千扰;子载波6 ~子载波12作为下行信道(地面端设备至井下端设备);子载波13 ~子载波26作为保留子载波(不使用), 起到将下行信道和上行信道隔离的作用;子载波27〜子载波221作为上行信道(井下端设备至地面端设备);其中,子载波36为导频子信道,其余为上行业务子信道。 In the armored logging cable, according to the basic parameters of the above-described OFDM channel is divided, wherein the sub-carriers are reserved 0- 5 sub subcarrier wave plant (not used) not used subcarriers 0~ reason is to avoid subcarrier 5 AC low frequency supply one thousand interference; subcarriers 6 through sub-carrier 12 as a downlink channel (the ground side apparatus to the downhole end of the device); subcarriers 13 through sub-carrier 26 as the reserved subcarriers (not used), functions of the downlink channels and uplink channel isolation effect; 27~ subcarriers 221 subcarrier as the upstream channel (downhole end of the device to the ground terminal apparatus); wherein a pilot subcarrier 36 subchannels, the remaining uplink traffic subchannels. 导频子信道上传输的导频信号为一正弦波,用于发送端和接收端之间进行时钟同步。 The pilot subchannel transmitted pilot signal is a sine wave, for performing clock synchronization between a transmitting end and a receiving end.

数据传输方法分为:信道初始化阶段和数据传输阶段。 The data transmission method is divided into: channel initialization phase and data transfer phase. 在信道初始化阶段需要完成:通信链路建立、发送功率控制、接收AGC参数、时钟同步、符号同步、帧同步、时域均衡器训练、频域均衡器训练、子信道性能估计、子信道比特分配和能量分配等操作。 Complete channel initialization phase: a communication link is established, transmission power control, reception AGC parameter, clock synchronization, symbol synchronization, frame synchronization, equalizer training time domain, frequency domain equalizer training, performance estimates subchannel, subchannel bit allocation energy distribution and other operations.

如图2所示,是井下仪器接口110的内部结构框图,井下部分的井下仪器接口110包括:以太网接口电路模块201、 1553总线接口电路模块202、 CAN总线接口电路模块203、模拟信号电路转换;漠块204、可编程逻辑器件205、用于井下接口控制的DSP (数字信号处理器)206、井下仪器接口端Flash207和SRAM (静态随机存储器)208。 2 is a block diagram showing the internal structure of downhole interface 110, a downhole interface 110 portion of the downhole tool comprising: an Ethernet interface module circuit 201, the bus interface circuit 1553 module 202, CAN bus interface circuit module 203, converts the analog signal circuit ; desert block 204, the programmable logic device 205, DSP (digital signal processor) for controlling the downhole interfaces 206, and a downhole instrument interface end Flash207 SRAM (static random Access memory) 208.

井下仪器接口110和地面部分的地面终端接口102之间采用TCP/IP协议的方式传送数据,井下部分采用TCP/IP协议的方式将釆集的数据传输回地面部分,地面部分采用TCP/IP协议的方式向井下部分发送命令。 Data transmission mode back to the ground portion of the downhole tool interface 110 and the ground terminal ground segment interface mode using TCP / IP protocol to transfer data between the device 102, using the downhole portion of the TCP / IP protocol will be set Bian, ground segment using TCP / IP protocol send commands to the downhole portion.

井下仪器接口110中以太网接口电路模块201、 1553总线接口电路才莫块 Ethernet interface 110 downhole module interface circuit 201, the bus interface circuit 1553 blocks only Mo

202、 CAN总线接口电路模块203、模拟信号电路转换模块204为适应井下仪器lll的四种接口方式。 202, CAN bus interface circuit module 203, module 204 converts the analog signal circuit to adapt to four kinds of interface mode downhole lll. 其中,以太网接口电路模块201可直接与支持符合10Base2标准的以太网接口的井下仪器111进行连接,1553总线接口电路模块202可直接与支持符合1553总线标准的井下仪器111进行连4妾,CAN总线接口电路模块203可直接与支持CAN (Controller Area Network,控制器局域网)总线标准的井下仪器111进行连接,模拟信号电路转换模块204可与输出峰峰值小于土10伏的模拟信号的井下仪器111进行连接。 Wherein the circuit module 201 may be an Ethernet interface Ethernet interfaces downhole instrument 111 directly in line with the support 10Base2 standard connection, the bus interface circuit 1553 and support module 202 may conform to the standard direct downhole tool 1553 111 4 concubine even, CAN downhole module bus interface circuit 203 can be directly cAN (controller Area Network, controller Area Network) bus standard for connecting downhole tool support 111, an analog signal conversion circuit and the output module 204 may be less than ± 10 volt peak to peak analog signal 111 to connect. 通过1553总线接口电路模块202、 CAN总线接口电路模块203、模拟信号电路转换模块204接口方式传送井下仪器接口110采集的数据到可编程逻辑器件205,在可编程逻辑器件205中根据接口方式的不同进行打包,并送至用于井下接口控制的DSP206,井下仪器接口端Flash207用于存储井下接口控制的DSP206的程序,SDRAM208用于緩存井下接口控制的DSP206接收到的各种井下仪器111采集的数据以及辅助井下接口控制的DSP206进行TCP/IP协议处理。 202, CAN bus interface circuit module 203, module 204 converts the analog signal circuit transport interface mode data 110 acquired downhole tool bus interface circuit 1553 via the interface module to the programmable logic device 205, different in the programmable logic device 205 according to the embodiment of the interface DSP206 DSP206 DSP 206 programs packaged, and sent to the interface control downhole, the downhole instrument interface for storing the downhole end Flash207 interface control, SDRAM208 for buffering received downhole interface control various downhole data collection 111 and an auxiliary interface control downhole DSP206 for TCP / IP protocol processing.

如图3所示,是本实用新型中COFDM调制器A、 COFDM解调器A以及井下线缆接口的内容实现框图。 3, the present invention is the COFDM modulator A, A COFDM demodulator and a content downhole cable interface of realization diagram. 井下部分的COFDM调制器A109包括: 井下调制端DSP301、井下调制端Flash (非易失性存储器)302、调制端数据转换器303、 D/A转换器304、调制端PGA (可编程增益放大器)305、井下调制端滤波器306、调制端PGA控制电路307;井下部分的COFDM解调器A108包括:井下解调端DSP311、井下解调端Flash312、解调端数据转换器313、 A/D转换器314、解调端PGA315、井下解调端滤波器316、解调端PGA (可编程增益放大器)控制电路317、抑制井下调制端信号的电路^=莫块318; 井下部分的井下线缆接口107包括:调制信号驱动电路308和井下变压器319, 在调制信号驱动电路308和井下变压器319之间连接有匹配电阻309和匹配电阻310。 COFDM modulator A109 downhole portion comprises: modulating a downhole end DSP301, modulation downhole end Flash (nonvolatile memory) 302, a modulation terminal of the data converter 303, D / A converter 304, the modulation side PGA (Programmable Gain Amplifier) 305, the downhole end of the modulation filter 306, a modulation of the PGA control circuit 307; downhole portion A108 COFDM demodulator comprising: demodulating a downhole end DSP311, demodulation downhole end Flash312, end demodulated data converter 313, a / D converter 314, a demodulation end PGA315, the downhole end of the demodulation filter 316, a demodulation end PGA (programmable gain amplifier) ​​control circuit 317, the signal suppression circuit of the downhole end of the modulation block 318 ^ = Mo; downhole cable interface downhole portion 107 includes: a modulation signal driving circuit 308 and downhole transformer 319, between the modulation signal driving circuit 308 and the transformer 319 is connected downhole matching resistor 309 and the matching resistor 310.

地面部分的COFDM调制器B103、 COFDM解调器B104和井下部分的COFDM调制器A109、 COFDM解调器A108最终通过测井电缆106连接构成一个环3各。 COFDM modulator ground portion B103, B104 and the COFDM demodulator COFDM modulator downhole portion A109, COFDM demodulator A108 final logging cable 106 is connected via a 3 constituting each ring.

用于井下接口控制的DSP206、井下调制端DSP301、井下解调端DSP311 均可选用TI公司的DSP芯片SM320C6415,可编程逻辑器件205、调制端数 DSP 206, modulated downhole end DSP301, DSP311 for a downhole end a downhole demodulating interface control may use TI DSP chip SM320C6415, programmable logic device 205, a modulation terminal

据转换器303和解调端数据转换器313均可选用Altera公司的EP1C6T144I7 来实现,调制端PGA305和解调端PGA315均可选用Analog公司的芯片AD603SQ/883B, D/A转换器304可选用TI公司的DAC5672MPFBEP, A/D 转换器314可选用TI公司的THS1408MPHPEP。 Data converter 303 and the demodulator 313 ends the data converter can be selected to achieve EP1C6T144I7 Altera Corporation, modulation and demodulation terminal end PGA305 PGA315 can be selected Analog's chips AD603SQ / 883B, D / A converter 304 can use TI company DAC5672MPFBEP, a / D converter 314 may be selected TI's THS1408MPHPEP. TI公司的DSP芯片SM320C6415是一款高性能的固定点的数字信号处理器,工作频率最大可支持720MHz,它提供了一个64位的EMIFA (外部存储器接口), 一个16位的EMIFB接口,三个多通道緩冲串行接口(McBSP接口),支持32-bit/33MHz, 3.3V的PCI主/从接口,兼容PCI2.2规范。 TI's high-performance DSP chip SM320C6415 is a fixed point digital signal processor, it can support the maximum operating frequency of 720MHz, which provides a 64-bit of the EMIFA (External Memory Interface), a 16-bit interface to EMIFB, three multi-channel buffered serial port (McBSP Interface), supports 32-bit / 33MHz, 3.3V a PCI master / slave interface, compatible PCI2.2 specification. 在本实用新型中,井下调制端DSP301、井下解调端DSP311以及用于井下接口控制的DSP206均通过SM320C6415芯片的McBSP接口实现互联,同时用于井下接口控制的DSP206 与可编程逻辑器件205之间的连接也可通过McBSP接口进行连4妄。 In the present invention, the downhole end of the modulation DSP301, DSP311 downhole end demodulating DSP 206 and are used by the downhole interface control McBSP SM320C6415 interface chip interconnection, between 205 DSP206 for both programmable logic device and the downhole interface control connection can also be connected via jump 4 McBSP interface. 可编程逻辑器件205本身没有McBSP接口,但是由于可编程逻辑器件205釆用可编程逻辑器件,所以可以很方便地实现McBSP接口的功能。 Programmable logic device 205 does not have McBSP interface, but since the programmable logic devices preclude the use of programmable logic device 205, it can easily realize the function McBSP interface. 井下调制端DSP301 与调制端数据转换器303、井下解调端DSP311与解调端数据转换器313以及用于井下接口控制的DSP206与以太网接口电路;溪块201均可通过SM320C6415芯片的EMIFB接口进行连接,而用于井下接口控制的DSP206 与SRAM208之间可通过EMIFA接口进行连接。 Modulation with a modulation DSP301 downhole end side data converter 303, demodulates the downhole end of the end DSP311 demodulation data converter 313 and interface circuit DSP206 Ethernet interface control for downhole; Creek block 201 can be accessed through the interface SM320C6415 chip EMIFB connection, and can be connected through to the interface between the DSP206 and SRAM208 EMIFA downhole interface control. 所有为了存储DSP程序而选用的Flash均连4秦到相应DSP的EMIFB接口上。 To store all the DSP program and selected Flash 4 are connected to the Qin EMIFB corresponding interface of DSP. 调制端PGA305和解调端PGA315均可利用相应DSP的EMIFA接口通过对应的PGA控制电i?各进行PGA控制。 Modulation and demodulation terminal end PGA305 PGA315 can use the corresponding interface to the DSP EMIFA PGA control circuit by a corresponding I? PGA for each control.

地面部分的COFDM调制器B103和COFDM解调器B104的工作原理与井下部分的COFDM调制器Al09和COFDM解调器Al08类似,因此可参照井下部分的COFDM调制器A109和COFDM解调器A108进行i殳计。 Terrestrial COFDM modulator portion B103 and the COFDM demodulator works with Al09 and COFDM modulator COFDM demodulator B104 downhole portion of Al08 Similarly, reference may therefore COFDM modulator COFDM demodulator A109 and A108 downhole portion for i Shu meter.

下面参照图1,从整体上对用于石油测井的高速数据传输装置的工作过程i故详细i兌明。 Referring now to Figure 1, a whole working process of high speed data transmission apparatus used in oil well logging i i against it in detail next.

地面终端101根据石油测井的需要发送相应命令,这些命令在地面终端101中按照一定的格式进行打包后通过地面终端接口102送至COFDM调制器B103 ,在COFDM调制器B103中对这些打包后的命令进行COFDM调制, 然后COFDM调制器B103将经过COFDM调制后的命令送至地面线缆接口105, Ground terminal 101 transmits a command corresponding to the required oil well logging, these commands according to a certain format packaged ground terminal 101 via the interface 102 to the ground terminal COFDM modulator B103, B103 in the COFDM modulator after these packaged COFDM modulation command, then the COFDM modulator B103 through the COFDM modulation command to the ground cable interface 105,

井下线缆接口107和COFDM解调器A108;在COFDM解调器A108中,对井上传过来的经过COFDM调制后的命令进行COFDM解调,恢复出经过地面终端101打包后的命令,COFDM解调器A108然后将恢复出这些经过地面终端101打包后的命令送至井下仪器接口110,井下仪器接口IIO根据地面终端101对命令的打包格式解析出接收到的命令,同时也可解析出该接收到的命令是属于井下仪器111中的哪个井下仪器,最后井下仪器接口110将该接收到的命令通过相应的接口传至该命令所要控制的井下仪器111。 The downhole interface 107 and the cable COFDM demodulator A108; in the COFDM demodulator A108, a command to upload over the well through the COFDM modulated COFDM demodulation to recover the ground terminal through the command package 101, COFDM demodulator A108 is then recovered through these ground terminals 101 of the command to the downhole instrument package interface 110, a downhole instrument interface IIO parsing the received command based on the packaging format of the command ground terminal 101, while also receiving the parsed command belongs to which downhole tool 111 downhole, the downhole instrument interface 110 the last command received by the corresponding interface command is transmitted to the downhole tool 111 to be controlled. 地面部分的地面终端接口102采用CPCI接口。 Ground terminal ground segment uses CPCI interface 102 interfaces.

井下仪器111根据所接收到的命令,按照命令的要求采集相应的数据, 并将采集的数据传给井下仪器接口110,在井下仪器接口110中对釆集的数据按照一定的格式进行打包,然后将经过打包后的数据送至井下部分的COFDM调制器A109进行COFDM调制,然后COFDM调制器A109将经过COFDM调制后采集的数据送至井下线缆接口107后,再利用电缆106将这些COFDM调制后采集的数据依次送至地面部分的地面线缆接口107和COFDM解调器B104;在COFDM解调器B104中,对井下传过来的经过COFDM调制后采集的数据进行COFDM解调,恢复出经过井下仪器接口110 打包后的采集数据,然后COFDM解调器B104将恢复出的这些采集数据通过地面终端接口102送至地面终端101,地面终端101根据井下仪器接口110 的打包格式恢复出井下仪器111输出的最终的采集数据,地面终端101对这些最终的采集数据进行存储、处理、分析 The downhole data 111 of the received command, in accordance with the corresponding data acquisition request command, and pass the collected downhole interface 110, to preclude the data set according to a certain format packaged in downhole interface 110, and then after the packetized data to the downhole portion COFDM modulator A109 COFDM modulation is performed, and then the data modulator A109 COFDM COFDM modulation after the collected downhole cable interface 107 is supplied, and then use the cable 106 after the COFDM modulation data acquisition interface 107 are sequentially supplied to the ground wire COFDM demodulator B104 and the ground portion; the COFDM demodulator B104, the downhole data transmission over through COFDM modulation COFDM collected after demodulated to recover the downhole through the data collection data collection interface 110 of the instrument package and the COFDM demodulator B104 recovered to the ground terminal 101 through the interface 102 the ground terminal, the ground terminal 101 to recover the downhole apparatus 111 according to the output format downhole instrument package interface 110 the final data collection, the ground terminal 101 of these final collected data storage, processing, analysis 显示、打印。 Display, print.

用于石油测井的高速数据传输装置按照上述的工作过程循环工作,直到所需要测试的内容测试完毕。 High speed data transmission for oil well logging apparatus according to the above-described working cycle of the working process, until the desired content of the test tested.

下面参照图3,对井下部分的工作过程做进一步说明。 A downhole portion of working process described below with further reference to FIG.

COFDM调制器A109工作过程是:井下调制端DSP301接收井下仪器接口110传来的井下仪器111采集的数据,并进行COFDM调制,然后送至调制端数据转换器303,在调制端数据转换器303中,按照D/A转换器304的采样频率连续地将数据送至D/A转换器304,在D/A转换器304中进行数字到模拟的变换输出模拟信号,该模拟信号在井下调制端DSP301和调制端PGA 控制电路307的控制下通过调制端PGA305进行放大并输出至井下线缆接口107中的井下调制端滤波器306,最后在井下调制端滤波器306进行滤波后送 COFDM modulator A109 working process is: the downhole end DSP301 modulated downhole tool interface 110 receives the data transmitted from downhole instrument 111 collected and COFDM modulation, and then sent to the modulation terminal of the data converter 303, the data converter 303 at the end of the modulator according to D / a converter 304 of the sampling frequency of the data to be continuously D / a converter 304, digital-to-analog converting an output analog signal in D / a converter 304, the analog signal is modulated downhole end DSP301 and amplified by modulating the control terminal of the PGA305 modulation of the PGA control circuit 307 and output to the downhole end of the filter 107 is modulated downhole cable interface 306, and finally filtered evacuation modulated downhole end filter 306

至井下线缆接口107中的调制信号驱动电路308,在调制信号驱动电路308 中经过驱动后送至测井电缆106;井下调制端Flash302用于存储井下调制端DSP301的程序。 Modulation signal to the driving circuit 308 in the downhole cable interface 107, the modulation signal driving circuit 308 through the driver 106 to the wireline; downhole end Flash302 modulator modulating a downhole end DSP301 for storing a program.

井下部分的COFDM解制器A108工作过程是:井下线缆接口107输出至电缆106的信号同时送至抑制井下调制端信号的电路才莫块318,在抑制井下调制端信号的电路^^莫块318中对COFDM调制器A109输出至电缆106的信号进行抑制以降低该信号对COFDM解调器A108的影响,然后送到井下解调端滤波器316中进行滤波,滤波后的信号送到解调端PGA315中,解调端PGA315在井下解调端DSP311和解调端PGA控制电路317的控制下对接收到的滤波后的信号进行放大,经过解调端PGA315放大后的信号送至A/D转换器314中按照A/D转换器的釆样频率进行^t拟到数字的变换,最后在解调端数据转换器313的控制下将A/D转换器314变换后的数字信号送至井下解调端DSP311,在井下解调端DSP311中进行COFDM解调,并将解调后的信号送至井下仪器接口110进行进一步的处理,井下解调端Flash312用于存储井下解调端DSP311的程序。 Solutions COFDM system device downhole portion A108 working process is: the downhole cable interface 107 outputs the signal cable 106 to a modulation circuit downhole end of the signal while suppressing it to the Mo block 318, the suppression circuit ^^ downhole end of the modulated signal blocks Mo output 318 of modulator A109 COFDM signal cable 106 to be suppressed to reduce the effect of the COFDM signal demodulator A108, and then filtered to demodulate a downhole end of the filter 316, the filtered signal to a demodulator PGA315 end, the demodulator demodulating the end PGA315 downhole end DSP311 and demodulating the filtered signal terminals of the PGA circuit 317 under control of a received control amplifies the demodulated signal after amplification to the PGA315 end a / D converter 314 in accordance with a sampling frequency of preclude the a / D converter is proposed ^ t to the digital conversion, demodulation and finally under the control terminal of the data converter 313 a / D converter 314 transforms the digital signal to the downhole demodulating end DSP311, DSP311 in the downhole end of the COFDM demodulator demodulates and further processing the demodulated signal to downhole equipment interface 110, a downhole end Flash312 demodulator demodulating downhole end for storing a program DSP311 .

COFDM调制器A109中的D/A转换器304的采样频率与COFDM解调器A108中的A/D转换器314的采样频率相同,并且都由COFDM调制器A109 中的调制端数据转换器303中产生。 A109 in COFDM modulator D / A converter with the sampling frequency of the COFDM demodulator A108 304 in the A / D converter 314 of the same sampling frequency, and by the COFDM modulated in modulator A109 end data converter 303 produce.

在本实施例中,D/A转换器304的采样频率与COFDM解调器A108中的A/D转换器314的采样频率均为625千赫兹。 In the present embodiment, D / A converter sampling frequency COFDM demodulator A108 304 in the A / D converter 625 are the sampling frequency of 314 kHz. 通过实际测试,在7000米的电缆上该传输装置的上传速率可达到800kbps,下传速率30kbps,在5500米的电缆上该传输装置的上传速率则可达到1Mbps以上,并且传输误码率均在5 xl(T-8以下,因此大大提高了测井系统的传输码率。另外,所述的用于石油测井的高速数据传输装置还结合测井系统的本身特点,在井下部分加入了在测井系统中常用的接口模块,从而很容易与井下测井仪器进行连接,从而提高了现有的井下测井仪器的利用率,同时也P争低了测井成本。 Through testing, on a 7000 m uploading rate of the cable up to 800kbps transmission device, the transmission rate of 30kbps, in 5500 meters of cable uploading rate of the transmission device can reach more than 1Mbps, and the transmission error rate 5 xl (T-8 or less, thus greatly improving the transmission rate of the logging system. in addition, the high-speed data transmission oil well logging apparatus for logging system further binding characteristics of itself, the addition of the downhole portion logging system common interface module, so that it is easy to connect with the downhole logging tool, thereby improving the utilization of existing downhole logging tool, and also logging P contention low cost.

显然,本领域的技术人员可以对本实用新型进行各种改动和变型而不脱离本发明的精神和范围。 Obviously, those skilled in the art without departing from the spirit and scope of the can of the present invention of the present invention that various modifications and variations. 这样,倘若对本实用新型的这些修改和变型属于本实用新型权利要求及其等同技术的范围之内,则本实用新型也意图包含这些改动和变型在内。 Thus, if part of the present invention as claimed in claim of the present invention such modifications and variations and their equivalents of the art, the present invention intends to include these modifications and variations.

Claims (10)

1.一种用于石油测井的高速数据传输装置,包括:地面部分和井下部分,其特征在于,所述地面部分各个结构依次相连接,包括:地面终端、地面终端接口、地面编码正交频分多路复用COFDM调制解调器、地面线缆接口;所述井下部分各个结构依次相连接,包括:井下仪器、井下仪器接口、井下COFDM调制解调器、井下线缆接口;所述地面线缆接口和井下线缆接口通过测井电缆相连接。 1. A high speed data transmission for oil well logging apparatus, comprising: a downhole portion and a surface portion, wherein the ground portion of each structure are connected in sequence, comprising: a ground terminal, a terrestrial interface, coded orthogonal ground terminal COFDM OFDM modem, cable interface surface; the downhole portion of each structure are connected in sequence, comprising: a downhole tool, a downhole instrument interface, COFDM downhole modem, a downhole cable interface; the ground and underground cable interface a cable connected to the interface via a logging cable.
2、 根据权利要求1所述的用于石油测井的高速数据传输装置,其特征在于,所述地面COFDM调制解调器包括:地面COFDM调制器和地面COFDM 解调器;所述井下COFDM调制解调器包括:井下COFDM调制器和井下COFDM解调器。 2. The high speed data transmission for oil well logging apparatus according to claim 1, wherein said ground COFDM modem comprising: a terrestrial COFDM terrestrial COFDM modulator and demodulator; COFDM said downhole modem comprising: a downhole COFDM COFDM modulator and demodulator downhole.
3、 根据权利要求1所述的用于石油测井的高速数据传输装置,其特征在于,所述井下仪器接口包括:以太网接口电路模块、1553总线接口电路^t块、 CAN总线接口电路模块或者模拟信号电路转换模块;以及,可编程逻辑器件、 数字信号处理器DSP、井下仪器接口端非易失性存储器Flash和静态随机存储器SRAM;所述以太网接口电路模块、1553总线接口电路模块、控制器局域网CAN总线接口电路^莫块或者模拟信号电路转换才莫块和所述可编程逻辑器件相连接,所述DSP分别与所述可编程逻辑器件、井下仪器接口端Flash和静态随机存储器SRAM和井下COFDM调制解调器相连接。 3, high speed data transmission for oil well logging apparatus according to claim 1, wherein the downhole instrument interface comprising: Ethernet interface module, bus interface circuit 1553 blocks ^ t, CAN bus interface circuit module converting the analog signal or a circuit module; and, a programmable logic device, the DSP digital signal processor, the downhole tool interface end nonvolatile memory Flash and the SRAM static random access memory; the Ethernet interface module, a module bus interface circuit 1553, a controller area network CAN bus interface circuit block ^ Mo or Mo was converted analog signal circuit blocks and said programmable logic device is connected, respectively to the DSP the programmable logic device, the downhole tool interface end static random access memory SRAM and Flash and a modem downhole connected to COFDM.
4、 根据权利要求3所述的用于石油测井的高速数据传输装置,其特征在于,所述井下仪器接口釆集的数据通过所述1553总线接口电路才莫块、CAN 总线接口电路模块或者模拟信号电路转换模块传输到可编程逻辑器件,所述可编程逻辑器件打包送至所述DSP。 4. The apparatus for high speed data transmission to claim oil well logging according to claim 3, wherein the downhole instrument interface preclude data set by the only mo block 1553 bus interface circuit, CAN bus or the interface circuit module circuit switching module to transmit the analog signal to a programmable logic device, the programmable logic device package to said DSP.
5、 根据权利要求1所述的用于石油测井的高速数据传输装置,其特征在于,所述井下仪器接口和地面终端接口之间采用TCP/IP协议的方式传送数据;所述井下部分采用TCP/IP协议的方式将采集到的数据传输回所述地面部分,所述地面部分采用TCP/IP协议的方式向井下部分发送命令。 5. The high-speed data transmission for oil well logging apparatus according to claim 1, characterized in that, using TCP / IP protocol to transmit data between the way the downhole instrument interface and the ground terminal interface; using the downhole portion way TCP / IP protocol in the collected data back to the ground portion, the ground portion using TCP / IP protocol to send commands to the downhole portion.
6、 根据权利要求2所述的用于石油测井的高速数据传输装置,其特征在于,所述井下COFDM调制器包括:井下调制端DSP、井下调制端Flash、调制端数据转换器、数模转换器、调制端可编程增益放大器PGA、井下调制端滤波器、调制端PGA控制电路;所述井下调制端DSP接收井下仪器采集的数据进行COFDM调制后发送至所述调制端数据转换器,所述调制端数据转换器按照所述数模转换器的采样频率将所述数据送至所述数^^莫转换器,所述数;溪转换器进行数模变换后输出模拟信号,所述;f莫拟信号在所述井下调制端DSP和调制端PGA控制电路的控制下通过所述调制端PGA进行放大并输出至所述井下线缆接口的井下调制端滤波器,所述井下调制端滤波器滤波后送至所述井下线缆接口的调制信号驱动电路,所述调制信号驱动电路经过驱动后送至所述测井电缆。 6, high speed data transmission apparatus according to claim for oil well logging according to claim 2, wherein said downhole COFDM modulator comprising: a modulation downhole end of the DSP, the downhole end of the Flash modulated, the modulated side data converter, a digital to analog converter, a modulation terminal of a programmable gain amplifier PGA, the downhole end of the filter modulation, the modulation of the PGA control circuit; said data modulated downhole end a downhole DSP instrument acquires received COFDM modulation after the modulation to the transmitting end of the data converter, the end of said modulated data converter sampling frequency of the digital to analog converter to said number of said data converter ^^ Mo, said number; Brooks digital to analog converter converting the analog output signal, said; Mo analog signal f carried out in the downhole end of a DSP and a modulation control circuit for controlling modulation of the PGA by the modulation of the PGA amplifies and outputs the modulated downhole end of the downhole cable interface of the filter, the downhole end of the filter modulation is the filtered modulation signal to said driving circuit of the downhole cable interface, the modulation signal supplied to the drive circuit after driving the logging cable.
7、 根据权利要求6所述的用于石油测井的高速数据传输装置,其特征在于,所述井下部分的井下线缆接口包括:调制信号驱动电路和井下变压器, 所述调制信号驱动电路和井下变压器之间连接有匹配电阻;所述调制信号驱动电路和所述井下调制端滤波器相连接。 7 The high speed data transmission for oil well logging apparatus according to claim 6, wherein the downhole portion of the downhole cable interface comprises: a modulation signal and a downhole transformer drive circuit, drive circuit and said modulation signal a resistor connected between the downhole matching transformer; driving circuit and said modulation signal modulating the downhole end of the filter is connected.
8、 根据权利要求2所述的用于石油测井的高速数据传输装置,其特征在于,所述井下COFDM解调器包括:井下解调端数字信号处理器DSP、井下解调端Flash、解调端数据转换器、4莫数转换器、解调端PGA、井下解调端滤波器、解调端PGA控制电路、抑制井下调制端信号的电路模块;所述井下线缆接口的输出信号至所述测井电缆和抑制井下调制端信号的电路;漠块,所述抑制井下调制端信号的电赠4莫块对所述COFDM调制器输出至测井电缆的信号进行抑制后送到所述井下解调端滤波器进行滤波,滤波后的信号送到所述解调端PGA,所述解调端PGA在所述井下解调端DSP和解调端PGA控制电路的控制下对滤波后的信号进行放大,经过所述解调端PGA放大后送至所述模数转换器进行模数变换,在所述解调端数据转换器的控制下将所述模数转换器变换后的数字信号送至所述井下解调端 8, the high-speed data transmission according to claim for oil well logging apparatus according to claim 2, wherein said downhole COFDM demodulator comprises: demodulating a downhole end of the DSP digital signal processor, the downhole end of the Flash demodulation, Solutions end adjustment data converter, MO 4-digital converter, demodulates the terminals of the PGA, a downhole end of demodulation filters, demodulators terminals of the PGA control circuit controls the modulation circuit module downhole end signal; an output signal of the interface cable to the downhole the suppression circuit and a downhole logging cable end of the modulated signal; desert after block, the modulated downhole end suppress electrical signal presented to said output block 4 Mo COFDM modulator wireline signal to be suppressed to the the downhole end of the filter to filter the demodulated, filtered signal to the terminals of the PGA demodulation, the demodulation of the PGA in the downhole end under control of the DSP demodulator and demodulation of the PGA control circuit of the filtered digital signal amplifies the signal, after demodulation of the PGA amplifies the analog to digital converter to said analog-digital conversion, under the control terminal of said demodulated data converter converting said analog to digital converter the downhole end to the demodulation DSP,所述井下解调端DSP将COFDM解调后的信号送至所述井下仪器接口。 DSP, the DSP will downhole end of COFDM demodulation of the demodulated signal to the downhole instrument interface.
9、 根据权利要求6至8任一项所述的用于石油测井的高速数据传输装置,其特征在于,所述井下COFDM调制器中的数才莫转换器的釆样频率与所述井下COFDM解调器中的4莫数转换器的釆样频率相同。 9, high speed data transmission apparatus according to claim one for the oil well logging according to any claim 6 to 8, characterized in that the number of frequency samples downhole preclude COFDM modulator Mo converter only with the downhole Bian same sample frequency COFDM demodulator 4 MO-digital converter.
10、根据权利要求1所述的用于石油测井的高速数据传输装置,其特征在于,所述测井电缆采用铠装Camesa测井电缆。 10. The high speed data transmission for oil well logging apparatus according to claim 1, wherein the wireline logging cable using armored Camesa.
CNU2008200806766U 2008-05-15 2008-05-15 High-speed data transmission apparatus used for petroleum logging CN201196088Y (en)

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CN103334743B (en) * 2013-07-15 2016-04-06 中国海洋石油总公司 A kind of formation tester ground control system
CN104168101A (en) * 2014-08-28 2014-11-26 广西师范大学 Two-way transmission system for coal mine fully mechanized mining data and control command data
CN104168101B (en) * 2014-08-28 2017-10-24 广西师范大学 The bidirectional transmission system of coal mine fully-mechanized mining face data and control command data
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