CN101887635B - High-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater - Google Patents
High-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater Download PDFInfo
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- CN101887635B CN101887635B CN2010102261563A CN201010226156A CN101887635B CN 101887635 B CN101887635 B CN 101887635B CN 2010102261563 A CN2010102261563 A CN 2010102261563A CN 201010226156 A CN201010226156 A CN 201010226156A CN 101887635 B CN101887635 B CN 101887635B
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Abstract
The invention relates to a high-resolution multi-channel seismic exploration data transmission system at shallow layers of deepwater, which comprises a host, a quality control machine, a data exchange board, a primary digital packet, a secondary digital packet, a tail-end digital packet, a corresponding downlink command channel and a corresponding uplink data channel. The transmission system is characterized in that a repeater is arranged between the primary digital packet and the host; each digital packet the distance from which to the host is less than 150m transmits data to the data exchange board through LVDS, and then transmits the data to the host through a CPCI bus; and each digital packet the distance from which to the host is more than 150m transmits data to the repeater to finish data relaying, then transmits the data to the data exchange board through an LRH-PHY5802 bus, and finally transmits the data to the host through the CPCI bus. The data transmission system solves the problems that the transmission system is unstable and unreliable and can not work for long time during the data acquisition, transmission and pretreatment process in case of multiple channels and unequal distance.
Description
Technical field
The invention belongs to the offshore geophysical exploration field, be specifically related to a kind of high-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater.
Background technology
Marine multichannel seismic exploration system is carrying out multiple tracks when counting exploration operation, for fear of the decay that causes because of the long Distance Transmission of reflection wave signal, has to use signal directly is transformed into data through digital packets carries out transmission manner again.But when carrying out shallow-layer high resolving power multichannel seismic exploration; Because explosive source is little at interval, sampling rate is high, has formed mass data, when carrying out high speed, stable transfer data transmission; The multistage connection of digital packets since progression too much, the distance of main frame and first collection digital packets is much larger than the distance between two digital packets; Caused transmission system unstable, thereby had influence on the real-time data acquisition of multiple tracks earthquake, when serious even cause and to realize real-time data acquisition.
Summary of the invention
The purpose of this invention is to provide a kind of high-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater,, remedy the deficiency of prior art with the real-time transmission problem of the mass data that solves marine deep water shallow-layer high resolving power multichannel seismic exploration numeral cable.
The present invention adds a repeater between host data interface and digital packets, adopt the method for multi-protocols real-time Transmission simultaneously, realizes the real-time collection and the transmission of distributed earthquake data.
The present invention is under the pattern with differentiated control, and the 100M network-bus that main frame inside is controlled through ARM will receive data in real time and send to an other quality control machine, realizes real-time control, reception, pre-service under two host computer systems controls.Between host data interface and digital packets, add a repeater; And under the system that makes up, realize the real-time Transmission of geological data: when 1, distance is less than 150 meters between digital packets and the central control recording unit main frame, adopt the transmission control protocol of Low Voltage Differential Signal transmission interface (LVDS) transmission of 147Mbit/S between the digital packets through two kinds of following transmission modes; Adopt long distance, high-speed transfer agreement, i.e. long range network Physical layer 5802 load modes through repeater when 2, distance is greater than 150 meters between digital packets and central control recording unit main frame.
Two kinds of agreements realize steering logic and core algorithm at central control unit with FPGA hardware, make an explanation and change.Number passes agreement and is known custom protocol, uses the signal driving of the physical chip of Ethernet as the transmission of image data twisted-pair feeder; Use for reference the thought of Ethernet; Data forwarding with FPGA realization Physical layer guarantees the various protocols seamless link, and it is reliable and stable to guarantee that number passes.
When the invention solves data acquisition, transmission that multiple tracks number, distance do not wait, pre-service; The problem that transmission system is unstable, unreliable, can not work long hours, further simplified system management process makes the software program of various piece obtain maximum and simplifies; Can design the softest, the hardware system of suitable various piece; Thereby promoted the stability of total system, made the digital streamer system satisfy the offshore construction requirement better, obtained high economic benefit.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention.
Fig. 2 does not transmit synoptic diagram through the repeater data mode for the present invention.
Fig. 3 transmits synoptic diagram for the present invention through the repeater data mode.
Fig. 4 is a command stream waterline synoptic diagram of the present invention.
Wherein, 1, main frame; 2, quality control machine; 3, exchanges data plate; 4, repeater; 5, first digital packets; 6, from digital packets; 7, terminal digital packets; 8, network-bus; 9, cpci bus; 10, RS232 standard serial port; 11, LRH-PHY5802 bus; 12, RS485 bus; 13, Low Voltage Differential Signal transmission interface.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing and through specific embodiment.
As shown in Figure 1, the present invention includes: main frame 1, quality control machine 2, exchanges data plate (SIE) 3, repeater 4, first digital packets (DAMi) 5, a plurality of from digital packets (DAMi) 6, terminal digital packets (DAMi) 7.To difference in functionality, inside modules set separately known behavior model and between the exchanges data communications protocol.
Main frame 1 adopts cpci bus (COMPACTPCI) 9 with the data transmission of exchanges data plate 3; Through backboard cpci bus 9; To main frame 1, control and the configuration information through RS232 standard serial port 10 reception main frames 1 system software passes down exchanges data plate 3 simultaneously with data transfer.When main frame 1 and terminal digital packets 7 spacings greater than 150 meters, reliable in order to guarantee that data and state parameter are uploaded, the data relaying of accomplishing receiving by repeater 4, uploading again through LRH-PHY5802 bus 11 Long Range Ethernets completion data and state; Repeater 4 receives Host Commands through RS485 bus 12, accomplishes transmitting order to lower levels and receives image data, state through Low Voltage Differential Signal transmission interface (LVDS) 13 and each digital packets (first digital packets 5, from digital packets 6 and terminal digital packets 7).When main frame 1 and terminal digital packets 7 spacings less than 150 meters; Each digital packets directly uploads to exchanges data plate 3 through Low Voltage Differential Signal transmission interface (LVDS) 13 with data, state parameter, and the order that the exchanges data plate passes for 3 times is also accomplished through Low Voltage Differential Signal transmission interface (LVDS) 13.
Hardware system overall plan has determined this system data transmission to have three logical channels: down order passage, upstream data passage and uplink state passage.Two-way commutative in order to realize digital packets; Simultaneously in order to make the digital packets structural design simple; Overall plan realizes the physical channel that these three logical data passages are integrated into two equities; This means from physics realization and see, only have two passages, that is: down order passage and uplink state data channel.
1, command transfer passage down order passage comprises: main frame 1 adopts Standard PC I bus protocol with the command transfer agreement of exchanges data plate 3; Main frame 1 system software through RS232 standard serial port 10 will control with configuration information under pass to exchanges data plate 3; Transmit through the command channel of special use then, can carry out with the data transmission synchro-duplexing, down order is transferred to each digital packets (slave unit) and all is divided into two-way; One the tunnel directly passes down, and local parsing (Fig. 4) is carried out on another road.Bidding protocol comprises: start bit: the device address: command number: parameter length: parameter list: position of rest.Above-mentioned parameter adopts known standard.
2, data mode transmission channel upstream data and state transfer passage comprise: when main frame 1 and terminal digital packets 7 spacings less than 150 meters; Directly data are sent to exchanges data plate 3 from digital packets, give main frame 1 (Fig. 2) by cpci bus 9 with data transfer again through Low Voltage Differential Signal transmission interface LVDS 13.
Because transmission delay, data transmission adopts the mode of streamline.The time that the data transfer command that main frame 1 sends arrives each digital packets from the close-by examples to those far off increases gradually; Each digital packets is after receiving this order; Immediately local data and state are uploaded to the upper level digital packets, local data is uploaded after the end, just incites somebody to action the data upload of back stages of digital bag; Through transmission delay control data sequence, and check with the device address.Data protocol comprises: start bit: the device address: frame type: payload user data: check bit: position of rest.Above-mentioned parameter adopts known standard.Above-mentioned parameter adopts known standard.
When main frame 1 with terminal digital packets 7 spacings during greater than 150 meters; The repeater 4 that between first digital packets 5 and main frame 1, is provided with receives and the data from digital packets 6 and terminal digital packets 7 of main frame 1 spacing greater than 150 meters; After digital packets is transferred to repeater 4 with data and parameter; Data relaying by repeater 4 is accomplished receiving is sent to exchanges data plate 3 through LRH-PHY5802 bus 11 again, gives main frame 1 (Fig. 3) through cpci bus 9 with data transfer again.
Through above-mentioned system; When the invention solves data acquisition, transmission that multiple tracks number, distance do not wait, pre-service; The problem that transmission system is unstable, unreliable, can not work long hours, further simplified system management process makes the software program of various piece obtain maximum and simplifies; Can design the softest, the hardware system of suitable various piece, thereby promote the stability of total system.
Claims (3)
1. high-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater; Comprise main frame (1), quality control machine (2), exchanges data plate (3), first digital packets (5), from digital packets (6) and terminal digital packets (7); And corresponding downstream command channel and upstream data passage; It is characterized in that between first digital packets (5) and main frame (1), being provided with repeater (4); With main frame (1) distance less than 150 meters first digital packets (5), data are sent to exchanges data plate (3) through Low Voltage Differential Signal transmission interface (13) from digital packets (6) and terminal digital packets (7), pass through again cpci bus (9) with data transfer to main frame (1); With main frame (1) distance greater than 150 meters from digital packets (6) and terminal digital packets (7) with data transmission to repeater (4); Accomplish the data relaying by repeater (4); Be sent to exchanges data plate (3) through LRH-PHY5802 bus (11) again, give main frame (1) through cpci bus (9) with data transfer at last; Exchanges data plate (3) receives the order of main frame (1) through RS232 standard serial port (10); Repeater (4) receives the order that exchanges data plate (3) passes down through RS485 bus (12); Exchanges data plate (3) and repeater (4) will order down through Low Voltage Differential Signal transmission interface (13) and pass to first digital packets (5), from digital packets (6) and terminal digital packets (7).
2. like the described high-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater of claim 1; It is characterized in that down order passage and upstream data passage synchro-duplexing carry out; Down order is transferred to first digital packets (5) and all is divided into two-way during from digital packets (6); One the tunnel directly passes down, and local parsing is carried out on another road.
3. like the described high-resolution multi-channel seismic exploration data transmission system at shallow layer of deepwater of claim 1, it is characterized in that main frame (1) sends to an other quality control machine (2) to realize two host computer system controls through network-bus (8) with the data in real time that receives.
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| CN102692642B (en) * | 2012-06-12 | 2016-07-13 | 中国科学院地质与地球物理研究所 | Transmission of seismic data device based on ethernet PHY transceiver |
| CN103197344B (en) * | 2013-03-18 | 2016-04-06 | 中国海洋石油总公司 | For the command transfer of relay-type step by step method, the transmission board of offshore seismic exploration towing cable |
| CN104702309A (en) * | 2015-01-28 | 2015-06-10 | 水利部交通运输部国家能源局南京水利科学研究院 | River model test multi-channel wireless transmission and receiving communication system |
| CN106443767A (en) * | 2016-10-18 | 2017-02-22 | 连云港杰瑞自动化有限公司 | Petroleum seismic acquisition high-speed transmission system |
| CN108761525A (en) * | 2018-07-20 | 2018-11-06 | 中石化石油工程技术服务有限公司 | A kind of autonomous acquisition system of seismic prospecting untethered |
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| CN2775684Y (en) * | 2005-03-18 | 2006-04-26 | 中海油田服务股份有限公司 | Sea earth quake exploration data collecting and recording system |
| CN101477210B (en) * | 2009-01-15 | 2011-06-22 | 中国海洋石油总公司 | Earthquake data acquisition platform used for geophysical exploration |
| CN101561511A (en) * | 2009-05-19 | 2009-10-21 | 中国海洋石油总公司 | Towline data interface board for geophysical exploration |
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