CN203422478U - Geophysical detection data transmission node - Google Patents
Geophysical detection data transmission node Download PDFInfo
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- CN203422478U CN203422478U CN201320538238.0U CN201320538238U CN203422478U CN 203422478 U CN203422478 U CN 203422478U CN 201320538238 U CN201320538238 U CN 201320538238U CN 203422478 U CN203422478 U CN 203422478U
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Abstract
The utility model relates to a geophysical detection data transmission node. The geophysical detection data transmission node comprises an uplink pathway, a downlink pathway and an acquisition module transmission interface, wherein the downlink pathway mainly comprises a first transformer, an MLT-3/NRZI decoder, a first level matching network, a clock/data recovery device, a first command transponder, a second level matching network, an NRZI/MLT-3 encoder and a second transformer. The geophysical detection data transmission node is mainly applied to geophysical exploration, realizes greater distance data transmission among nodes, can further reduce hardware cost of a seismic exploration array system and improves work reliability of the system.
Description
Technical field
The utility model belongs to geophysical survey field, specifically, relates to the data transmission nodal for geophysical exploration.
Technical background
Seismic prospecting array system has a wide range of applications at aspects such as engineering exploration, petroleum prospecting, the exploration of submarine geology structure, the observations of marine fish population density, and the seismic prospecting system of main flow mainly contains the 408UL system of French SERCEL company, the SeaMUX Digital Array system of U.S. HTI company etc. in the market.Because the data bandwidth on transmission range and transmission line is inversely prroportional relationship, so when these systems are carried out data transmission between data transmission nodal (hereinafter to be referred as node), there is the not far shortcoming of transmission range; Because transmission range is not far, in equal length, to survey under the condition of cable section, they carry out data relay transmission with regard to the more node of needs, and more node not only can bring larger cost, but also can make the reliability of whole system reduce.Further, between the node of the France SERCEL 408UL of company system, adopt the mode of HDB3 coding to carry out data transmission, this kind of coded system can make in serial data stream, to have more timing information, to facilitate data receiver to carry out the extraction of bit synchronization clock, but, HDB3 coded system does not reduce the bandwidth of data stream on transmission line, and therefore this coded system has limited the transmission range between node on certain procedures.Simultaneously, between the node of the SeaMUX Digital Array of U.S. HTI company system, adopt the mode of Manchester's cde to carry out data transmission, this kind of coded system be the transmission bandwidth that increases data on transmission line be that cost facilitates data receiver to extract bit synchronization clock, its code efficiency only has 50%, therefore, this kind of coded system not only do not reduce the data transfer bandwidth on transmission line, also increased on the contrary data transfer bandwidth, so had a strong impact on the transmission range of data between node.
Utility model content
For overcoming the deficiencies in the prior art, the utility model is intended to:
(1) provide a kind of remote transmission node, its employing can reduce the coded system of data bandwidth on transmission line raw data is encoded, to realize the more transmission of remote data between node, and can further reduce the hardware cost of seismic prospecting array system and the functional reliability of raising system;
(2) adopt link multiplex technique, mode based on synchronous transmission, provide a kind of seismic signal data transmission nodal that down order, synchronized sampling clock are transmitted by a twisted-pair feeder or coaxial cable simultaneously, to reduce the expense of seismic prospecting array system internal transmission line;
(3) provide a kind of physical interface to have more the data transmission nodal for geophysical exploration of versatility;
(4) provide serial data transmission speed between a kind of node adjustable or adaptive general in the data long-distance transmissions node of geophysical exploration between 50Kbps-300Mbps.
For achieving the above object, the technical solution adopted in the utility model is that the data transmission nodal of geophysical exploration, consists of uplink, downlink, acquisition module transmission interface;
Downlink is mainly comprised of the first transformer, MLT-3/NRZI demoder, the first level match network, clock/data recovery device, the first order transponder, second electrical level matching network, NRZI/MLT-3 scrambler, the second transformer;
Further, the first transformer receives the order forwarding from node (i-1), and then export order to MLT-3/NRZI demoder, MLT-3/NRZI demoder carries out exporting the first level match network to the conversion from MLT-3 code to NRZI code to order again, through the first level match network, carry out after level match, order data stream is input in clock/data recovery device again, clock/data recovery device recovers bit synchronization clock and data from order data stream, and the bit synchronization clock recovering is exported from signal wire, recovering data exports from signal wire, then the recovery data that represent command information output to second electrical level matching network through the first order transponder again, order data is undertaken outputing to the second transformer the conversion from NRZI code to MLT-3 code by NRZI/MLT-3 scrambler afterwards, the second transformer outputs to order data in node (i+1) and goes again,
Uplink is mainly comprised of the 3rd transformer, the 2nd MLT-3/NRZI demoder, the 3rd level match network, clock/data recovery device, frame synchronizer, data receiver pretreater, node processing center, data transmission pretreater, the 3rd level match network, the 2nd NRZI/MLT-3 scrambler, the 4th transformer;
Further, the 3rd transformer receives the data that send from node (i+1), and then export data to the 2nd MLT-3/NRZI demoder, the 2nd MLT-3/NRZI demoder carries out exporting the 3rd level match network to the conversion from MLT-3 code to NRZI code to data again, through the 3rd level match network, carry out after level match, data stream is input in clock/data recovery device again, clock/data recovery device recovers bit synchronization clock and data from data stream, then the recovery data that represent detection data information output in data receiver pretreater again after frame synchronizer carries out data-frame sync, data receiver pretreater carries out outputing to node processing center after code conversion and 8B10B decoding to the data that receive, node processing center is by the data that receive from data receiver pretreater and from local data, receive the data that pretreater receives and carry out again framing, again data are sent to data and send pretreater, the data that data send pretreater output export in the 2nd NRZI/MLT-3 scrambler after the 3rd level match network, the 2nd NRZI/MLT-3 scrambler converts data to MLT-3 code from NRZI code and sends to node (i-1) and go by the 4th transformer,
The order data stream that down order path recovery goes out exports order to and receives pretreater after another frame synchronizer carries out frame synchronization, order receives pretreater to be carried out outputing to command analysis device after code conversion and 8B10B decoding to the order receiving, and the duty of whole node is controlled at node processing center by receiving the order of command analysis device;
The order that the bit synchronization clock recovering of synchronized sampling Clock Extraction module receive clock/data recoverer output simultaneously and order receive pretreater output, then the bit synchronization clock and the data that recover based on receiving, produce synchronized sampling clock, and synchronized sampling clock is outputed to synchronized sampling clock-forwarding module, synchronized sampling clock-forwarding module is passed through RS485 interface or SPI interface or direct-connected interface by synchronized sampling clock again and is exported acquisition module transmission interface to;
Also through the second order transponder, output to RS485 interface or SPI interface or direct-connected interface to the command synchronization of exporting from order reception pretreatment module, and then further output to acquisition module transmission interface;
Further, acquisition module transmission interface is transferred to local data by the detection data collecting by RS485 interface or SPI interface or direct-connected interface and receives pretreater, and local data receives pretreater and data sent to node processing center again.
The data transmission nodal of described geophysical exploration also comprises clock module, and the speed that sends data is set as required, and clock module provides one by the timer clock of setting rate sending data, then take this clock to carry out data transmission as benchmark; Meanwhile, clock/data recovery device is judged the transfer rate V of data stream adaptively from the data stream receiving, and the data stream that then duty of self to be adjusted to transfer rate be V matches, and to realize the self-adaptation of receiving velocity, regulates; Clock/data recovery device also can receive the configuration information from speed regulator, realize the coupling of its data receiving velocity, that is to say, when the data transmission rate of node is V, node processing center speed control regulator is exported corresponding configuration information to clock/data recoverer, by the data receiver rate configuration of clock/data recovery device, is V.
The utility model possesses following technique effect:
(1) for overcoming the shortcoming that the data bandwidth on transmission line between data transmission nodal in prior art (hereinafter to be referred as node) is constant or be elevated, a kind of remote transmission node is provided, its employing can reduce the coded system of data bandwidth on transmission line raw data is encoded, to realize the more transmission of remote data between node, and can further reduce the hardware cost of seismic prospecting array system and the functional reliability of raising system;
(2) adopt link multiplex technique, mode based on synchronous transmission, provide a kind of seismic signal data transmission nodal that down order, synchronized sampling clock are transmitted by a twisted-pair feeder or coaxial cable simultaneously, to reduce the expense of seismic prospecting array system internal transmission line;
(3) transmission interface in node downlink transfer path (information such as downlink transfer path transmission command) and the transmission interface in node uplink path are adopted in a like fashion, to improve the versatility of physical interface in node;
(4) the order path (downlink) of each node and data path (uplink) have serial data transmission speed adjustable or adaptive function between 50Kbps-300Mbps, so the transfer rate of node can adapt to the demand of the detection system of different scales, further, when detection system changes, the hardware of node and data transmission interface are not used as any variation, so the hardware of node and data transmission interface have versatility.
Accompanying drawing explanation
Fig. 1 illustrates the main functional diagram of the utility model seismic signal transmission node.
In Fig. 1: 1 is the data transmission nodal for geophysical exploration; 2 is acquisition module transmission interface; 3 is FGPA; 4 is high input voltage module; 5 is electric pressure converter; 6 is low pressure output module; 7 is transformer; 8 is NRZI/MLT-3 scrambler; 9 is level match network; 10 is transformer; 11 is MLT-3/NRZI demoder; 12 is level match network; 13 is clock/data recovery device; 14 is data transmission pretreater; 15 is the bit synchronization output terminal of clock recovering; 16 is the data output end recovering; 17 is frame synchronizer; 18 is order reception pretreater; 19 is order transponder (1); 20 is synchronized sampling Clock Extraction module; 21 is command analysis device; 22 is node processing center; 23 is order transponder (2); 24 is local data reception pretreater; 25 is synchronized sampling clock-forwarding module; 26 is RS485 interface/SPI interface/direct-connected interface; 27 is data receiver pretreater; 28 is frame synchronizer; 29 is clock/data recovery device; 30 is level match network; 31 is MLT-3/NRZI demoder; 32 is transformer; 33 is level match network; 34 is NRZI/MLT-3 scrambler; 35 is transformer, and 36 and 37 is speed regulator.
Embodiment
For overcoming the deficiencies in the prior art, (1) for overcoming the shortcoming that the data bandwidth on transmission line between data transmission nodal in prior art (hereinafter to be referred as node) is constant or be elevated, a kind of remote transmission node is provided, its employing can reduce the coded system of data bandwidth on transmission line raw data is encoded, to realize the more transmission of remote data between node, and can further reduce the hardware cost of seismic prospecting array system and the functional reliability of raising system;
(2) adopt link multiplex technique, mode based on synchronous transmission, provide a kind of seismic signal data transmission nodal that down order, synchronized sampling clock are transmitted by a twisted-pair feeder or coaxial cable simultaneously, to reduce the expense of seismic prospecting array system internal transmission line;
(3) transmission interface in node downlink transfer path (information such as downlink transfer path transmission command) and the transmission interface in node uplink path are adopted in a like fashion, to improve the versatility of physical interface in node;
(4) the order path (downlink) of each node and data path (uplink) have serial data transmission speed adjustable or adaptive function between 50Kbps-300Mbps, so the transfer rate of node can adapt to the demand of the detection system of different scales, further, when detection system changes, the hardware of node and data transmission interface are not used as any variation, so the hardware of node and data transmission interface have versatility;
For achieving the above object, the technical scheme that the utility model is taked is that the data transmission nodal for geophysical exploration, comprising:
Transformer: transformer is connected with the transmission line between node, it plays isolation and coupling to signal; Transmission line between two nodes is twisted-pair feeder or concentric cable;
NRZI/MLT-3 scrambler is for converting NRZI code to MLT-3 code;
MLT-3/NRZI demoder is for converting MLT-3 code to NRZI code;
Level match network is for the coupling of level between two disparate modules, and when the level between two disparate modules itself meets matching relationship, level match network can omit;
Clock/data recovery device is for recovering bit synchronization clock and data from the data stream receiving, clock/data recovery device can be realized by integrated chip, also can realize by software programming, and this clock/data recoverer has adaptive ability, can or automatically from speed, the serial data stream between 50Kbps-300Mbps, recover bit synchronization clock and data through artificial adjusting;
Positive or the negative power voltage supply pressure converter of high input voltage module output is used, after electric pressure converter is changed high-tension electricity, export various DC low-voltage to low pressure output module, the disparate modules that low pressure output module is distributed to these low-voltage DCs in node is again used;
Frame synchronizer, for realizing determining of serial data stream byte start bit, is realized data-frame sync;
Data send pretreater and receive the data from node processing center, then the data that receive are carried out exporting level match network to after 8B10B coding and code conversion;
Data receiver pretreater receives the data from frame synchronizer, then the data that receive is carried out outputing to node processing center after code conversion and 8B10B decoding;
Order receives pretreater and receives the order from frame synchronizer, then the order receiving is carried out outputing to order transponder, command analysis device and synchronized sampling Clock Extraction module after code conversion and 8B10B decoding simultaneously;
Order transponder (1) obtains order from the data output end of clock/data recovery device, and then order is forwarded to level match network;
Order transponder (2) receives pretreater from order and obtains order, and then order is forwarded to RS485 interface/SPI interface/direct-connected interface;
RS485 interface/SPI interface/direct-connected interface refers to that acquisition module transmission interface can be by RS485 interface or SPI interface or demand motive and directly carry out communication and communicate by letter with node by the mode that wire connects not;
Local data receives pretreater and receives the data from RS485 interface/SPI interface/direct-connected interface, and then by the data transmission receiving to node processing center;
The order that the bit synchronization clock of synchronized sampling Clock Extraction module receive clock/data recoverer output simultaneously and order receive pretreater output, then bit synchronization clock and data based on receiving, produce synchronized sampling clock, and synchronized sampling clock is outputed to synchronized sampling clock-forwarding module;
The synchronized sampling clock-forwarding that synchronized sampling clock-forwarding module is used for synchronized sampling Clock Extraction module to transmit is to RS485 interface/SPI interface/direct-connected interface;
Command analysis device receives the order that receives pretreater from order, after then the order receiving being identified, outputs to node processing center;
Node processing center is the core of whole node, it receives pretreater with local data and is connected with command analysis device, data receiver pretreater, data transmission pretreater simultaneously, and it has command recognition and processing, the reception of cascade detection data and processing, local detection data reception and processing simultaneously, detection data is processed and the function of transmission;
Further, node processing center receives on the one hand and comes from local data and receive the detection data that pretreater uploads (local data receives the detection data that pretreater uploads and refers to and node (i) (i=1, 2, 3, ) be arranged in the detection data of a plurality of passages that the acquisition module (i) of same electronic compartment collects), receive on the other hand the detection data (data receiver pretreater passes the upper detection data that node transmits that the detection data of coming refers to node (i)) that comes from data receiver pretreater biography and come, then these data are carried out to Frame restructuring, check information adds, after status information interpolations etc. are processed, again these processed data are sent in data transmission pretreater and go,
Further, node processing center receives the order that comes from command analysis device, then according to different command informations, controls the duty of node;
Further, from described node structure, node downlink transfer path has adopted link multiplex technique, its mode based on synchronous transmission, down order, synchronized sampling clock are transmitted by a twisted-pair feeder or coaxial cable simultaneously, to reduce the expense of seismic prospecting array system internal transmission line;
Further, from described node structure, the transmission interface hardware configuration in the transmission interface in node downlink transfer path and node uplink path is symmetrical, so the physical interface of node has versatility.
Below in conjunction with the drawings and specific embodiments, further describe the utility model.
Transformer: transformer is connected with the transmission line between node, it plays isolation and coupling to signal;
NRZI/MLT-3 scrambler is for converting NRZI code to MLT-3 code;
MLT-3/NRZI demoder is for converting MLT-3 code to NRZI code;
Level match network is for the coupling of level between two disparate modules, and when the level between two disparate modules itself meets matching relationship, level match network can omit;
Clock/data recovery device is for recovering bit synchronization clock and data from the data stream receiving, clock/data recovery device can be realized by integrated chip, also can realize by software programming, and this clock/data recoverer has adaptive ability, can or automatically from speed, the serial data stream between 50Kbps-300Mbps, recover bit synchronization clock and data through artificial adjusting;
Positive or the negative power voltage supply pressure converter of high input voltage module output is used, after electric pressure converter is changed high-tension electricity, export various DC low-voltage to low pressure output module, the disparate modules that low pressure output module is distributed to these low-voltage DCs in node is again used;
Frame synchronizer, for realizing determining of serial data stream byte start bit, is realized data-frame sync;
Data send pretreater and receive the data from node processing center, then the data that receive are carried out exporting level match network to after 8B10B coding and code conversion;
Data receiver pretreater receives the data from frame synchronizer, then the data that receive is carried out outputing to node processing center after code conversion and 8B10B decoding;
Order receives pretreater and receives the order from frame synchronizer, then the order receiving is carried out outputing to order transponder, command analysis device and synchronized sampling Clock Extraction module after code conversion and 8B10B decoding simultaneously;
Order transponder (1) obtains order from the data output end of clock/data recovery device, and then order is forwarded to level match network;
Order transponder (2) receives pretreater from order and obtains order, and then order is forwarded to RS485 interface/SPI interface/direct-connected interface;
RS485 interface/SPI interface/direct-connected interface refers to that acquisition module transmission interface can be by RS485 interface or SPI interface or demand motive and directly carry out communication and communicate by letter with node by the mode that wire connects not;
RS485 interface/SPI interface/direct-connected interface can carry out communicating by letter of full duplex with acquisition module transmission interface;
Local data receives pretreater and receives the data from RS485 interface/SPI interface/direct-connected interface, and then by the data transmission receiving to node processing center;
The order that the bit synchronization clock of synchronized sampling Clock Extraction module receive clock/data recoverer output simultaneously and order receive pretreater output, then bit synchronization clock and data based on receiving, produce synchronous acquisition clock, and synchronous acquisition clock is outputed to synchronized sampling clock-forwarding module;
The synchronous acquisition clock-forwarding that synchronized sampling clock-forwarding module is used for synchronized sampling Clock Extraction module to transmit is to RS485 interface/SPI interface/direct-connected interface;
Command analysis device receives the order that receives pretreater from order, after then the order receiving being identified, outputs to node processing center;
Node processing center is the core of whole node, it receives pretreater with local data and is connected with command analysis device, data receiver pretreater, data transmission pretreater simultaneously, and it has command recognition and processing, the reception of cascade detection data and processing, local detection data reception and processing simultaneously, detection data is processed and the function of transmission;
Further, node processing center receives on the one hand and comes from local data and receive the detection data that pretreater uploads (local data receives detection data that pretreater uploads and refers to the detection data that is arranged in a plurality of passages that the acquisition module (i) of same electronic compartment collects with node (i)), receive on the other hand the detection data (data receiver pretreater passes the upper detection data that node transmits that the detection data of coming refers to node (i)) that comes from data receiver pretreater biography and come, then these data are carried out to Frame restructuring, check information adds, after status information interpolations etc. are processed, again these processed data are sent in data transmission pretreater and go,
Further, node processing center receives the order that comes from command analysis device, then according to different command informations, controls the duty of node;
Below in conjunction with drawings and Examples, the utility model is described further.
Downlink: downlink orders path, further refers to that node receives from a upper node order forwarding, and then forwards the command to the path of next node.
Downlink is mainly comprised of transformer 10, MLT-3/NRZI demoder 11, level match network 12, clock/data recovery device 13, order transponder (1) 19, level match network 33, NRZI/MLT-3 scrambler, transformer 35;
Further, transformer 10 receives the order forwarding from node (i-1), and then export order to MLT-3/NRZI demoder 11, 11 pairs of orders of MLT-3/NRZI demoder are carried out exporting level match network 12 to the conversion from MLT-3 code to NRZI code again, through level match network 12, carry out after level match, order data stream is input in clock/data recovery device 13 again, clock/data recovery device 13 recovers bit synchronization clock and data from order data stream, and the bit synchronization clock recovering is from signal wire 15 outputs, recover data from signal wire 16 outputs, then recover data (representing the data of command information) and through order transponder (1), output to level match network 33 again, order data is undertaken outputing to transformer 35 conversion from NRZI code to MLT-3 code by NRZI/MLT-3 scrambler afterwards, transformer 35 outputs to order data in node (i+1) and goes again,
Uplink: uplink is data path, further refers to that node receives the data that send from next node, and then forwards the data to the path of a node.
Uplink is mainly comprised of transformer 32, MLT-3/NRZI demoder 31, level match network 30, clock/data recovery device 29, frame synchronizer 28, data receiver pretreater 27, node processing center 22, data transmission pretreater 14, level match network 9, NRZI/MLT-3 scrambler 8, transformer 7;
Further, transformer 32 receives the data that send from node (i+1), and then export data to MLT-3/NRZI demoder 31, 31 pairs of data of MLT-3/NRZI demoder carry out exporting level match network 30 to the conversion from MLT-3 code to NRZI code again, through level match network 30, carry out after level match, data stream is input in clock/data recovery device 29 again, clock/data recovery device 29 recovers bit synchronization clock and data from data stream, then recover data (representing the data of detection data information) outputs in data receiver pretreater 27 after frame synchronizer 28 carries out data-frame sync again, 27 pairs of data that receive of data receiver pretreater carry out outputing to node processing center 22 after code conversion and 8B10B decoding, node processing center 22 is by the data that receive from data receiver pretreater 27 and from local data, receive the data that pretreater 24 receives and carry out again framing, again data are sent to data and send pretreater 14, the data that data send pretreater 14 outputs export in NRZI/MLT-3 scrambler 8 after level match network 9, NRZI/MLT-3 scrambler 8 converts data to MLT-3 code from NRZI code and sends to node (i-1) and go by transformer 7,
Between downlink and uplink: be between order downlink and data uplink path between downlink and uplink;
Further, the order data stream that down order path recovery goes out exports order to and receives pretreater 18 after frame synchronizer 17 carries out frame synchronization, order receives 18 pairs of orders that receive of pretreater to be carried out outputing to command analysis device 21 after code conversion and 8B10B decoding, and the duty of whole node is controlled at node processing center 22 by receiving the order of command analysis device 21;
Between data transmission nodal and acquisition module transmission interface.
The order that the bit synchronization clock 15 recovering of synchronized sampling Clock Extraction module 20 receive clock/data recoverer output simultaneously and order receive pretreater 18 outputs, then the bit synchronization clock and the data that recover based on receiving, produce synchronized sampling clock, and synchronized sampling clock is outputed to synchronized sampling clock-forwarding module 25, synchronized sampling clock-forwarding module 25 exports synchronized sampling clock to acquisition module transmission interface 2 through RS485 interface/SPI interface/direct-connected interface 26 again;
The command synchronization that receives pretreatment module 18 outputs from order also outputs to RS485 interface/SPI interface/direct-connected interface 26 through order transponder (2), and then further outputs to acquisition module transmission interface 2;
Further, acquisition module transmission interface 2 is transferred to local data by the detection data collecting by RS485 interface/SPI interface/direct-connected interface 26 and receives pretreater 24, and local data receives pretreater 24 and data sent to node processing center 22 again;
Further, from described node structure, node downlink transfer path has adopted link multiplex technique, its mode based on synchronous transmission, down order, synchronized sampling clock are transmitted by a twisted-pair feeder or coaxial cable simultaneously, to reduce the expense of seismic prospecting array system internal transmission line;
Further, from described node structure, the transmission interface hardware configuration in the transmission interface in node downlink transfer path and node uplink path is symmetrical, so the physical interface of node has versatility.
Further, the speed that node (i) 1 sends data can be set as required, for example, when sending the speed of data and need to be set as 4.096Mbps, can provide one-period by FPGA is the timer clock of 4.096MHZ, then take this clock to send as benchmark carries out data; Meanwhile, clock/ data recovery device 13 or 29 has following function: (1) clock/data recovery device can be judged the transfer rate V of data stream adaptively from the data stream receiving, then the data stream that the duty of self to be adjusted to transfer rate be V matches, and to realize the self-adaptation of receiving velocity, regulates; (2) clock/ data recovery device 13 or 29 also can receive the configuration information from speed regulator 36 or 37, realize the coupling of its data receiving velocity, that is to say, when the data transmission rate of node is V, node processing center 22 can be controlled speed regulator 36 or 37 and export corresponding configuration information to clock/ data recoverer 13 or 29, by the data receiver rate configuration of clock/ data recovery device 13 or 29, is V.
Interface level matching network can by resistor network, realize according to the feature of level type or the acting in conjunction of level transferring chip realization or resistor network and level transferring chip realizes.For example, when the level of MLT-3/NRZI decoder output signal is PECL level, and clock and data recovery input interface level is while being LVPECL level, just can adopt level transferring chip MAX9375 to realize the function of interface level matching network, more interface level matching network can be referring to document: Luo Deyu, Huang Deyun, the feature of LVDS, ECL, CML logic level circuit and application [J], Guiyang University's journal (natural science edition), 2009,4 (4): 17-21.
Claims (2)
1. a data transmission nodal for geophysical exploration, is characterized in that, uplink, downlink, acquisition module transmission interface, consists of;
Downlink is mainly comprised of the first transformer, MLT-3/NRZI demoder, the first level match network, clock/data recovery device, the first order transponder, second electrical level matching network, NRZI/MLT-3 scrambler, the second transformer;
Further, the first transformer receives the order forwarding from node (i-1), and then export order to MLT-3/NRZI demoder, MLT-3/NRZI demoder carries out exporting the first level match network to the conversion from MLT-3 code to NRZI code to order again, through the first level match network, carry out after level match, order data stream is input in clock/data recovery device again, clock/data recovery device recovers bit synchronization clock and data from order data stream, and the bit synchronization clock recovering is exported from signal wire, recovering data exports from signal wire, then the recovery data that represent command information output to second electrical level matching network through the first order transponder again, order data is undertaken outputing to the second transformer the conversion from NRZI code to MLT-3 code by NRZI/MLT-3 scrambler afterwards, the second transformer outputs to order data in node (i+1) and goes again,
Uplink is mainly comprised of the 3rd transformer, the 2nd MLT-3/NRZI demoder, the 3rd level match network, clock/data recovery device, frame synchronizer, data receiver pretreater, node processing center, data transmission pretreater, the 3rd level match network, the 2nd NRZI/MLT-3 scrambler, the 4th transformer;
Further, the 3rd transformer receives the data that send from node (i+1), and then export data to the 2nd MLT-3/NRZI demoder, the 2nd MLT-3/NRZI demoder carries out exporting the 3rd level match network to the conversion from MLT-3 code to NRZI code to data again, through the 3rd level match network, carry out after level match, data stream is input in clock/data recovery device again, clock/data recovery device recovers bit synchronization clock and data from data stream, then the recovery data that represent detection data information output in data receiver pretreater again after frame synchronizer carries out data-frame sync, data receiver pretreater carries out outputing to node processing center after code conversion and 8B10B decoding to the data that receive, node processing center is by the data that receive from data receiver pretreater and from local data, receive the data that pretreater receives and carry out again framing, again data are sent to data and send pretreater, the data that data send pretreater output export in the 2nd NRZI/MLT-3 scrambler after the 3rd level match network, the 2nd NRZI/MLT-3 scrambler converts data to MLT-3 code from NRZI code and sends to node (i-1) and go by the 4th transformer,
The order data stream that down order path recovery goes out exports order to and receives pretreater after another frame synchronizer carries out frame synchronization, order receives pretreater to be carried out outputing to command analysis device after code conversion and 8B10B decoding to the order receiving, and the duty of whole node is controlled at node processing center by receiving the order of command analysis device;
The order that the bit synchronization clock recovering of synchronized sampling Clock Extraction module receive clock/data recoverer output simultaneously and order receive pretreater output, then the bit synchronization clock and the data that recover based on receiving, produce synchronized sampling clock, and synchronized sampling clock is outputed to synchronized sampling clock-forwarding module, synchronized sampling clock-forwarding module is passed through RS485 interface or SPI interface or direct-connected interface by synchronized sampling clock again and is exported acquisition module transmission interface to;
The command synchronization that receives pretreatment module output from order also outputs to RS485 interface or SPI interface or direct-connected interface through the second order transponder, and then further outputs to acquisition module transmission interface;
Further, acquisition module transmission interface is transferred to local data by the detection data collecting by RS485 interface or SPI interface or direct-connected interface and receives pretreater, and local data receives pretreater and data sent to node processing center again.
2. the data transmission nodal of geophysical exploration as claimed in claim 1, it is characterized in that, the data transmission nodal of described geophysical exploration also comprises clock module, the speed that sends data is set as required, clock module provides one by the timer clock of setting rate sending data, then take this clock to carry out data transmission as benchmark; Meanwhile, clock/data recovery device is judged the transfer rate V of data stream adaptively from the data stream receiving, and the data stream that then duty of self to be adjusted to transfer rate be V matches, and to realize the self-adaptation of receiving velocity, regulates; Clock/data recovery device also can receive the configuration information from speed regulator, realize the coupling of its data receiving velocity, that is to say, when the data transmission rate of node is V, node processing center speed control regulator is exported corresponding configuration information to clock/data recoverer, by the data receiver rate configuration of clock/data recovery device, is V.
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| CN201320538238.0U CN203422478U (en) | 2013-08-29 | 2013-08-29 | Geophysical detection data transmission node |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454674A (en) * | 2013-08-29 | 2013-12-18 | 天津大学 | Data transmission node for geophysical prospecting |
| CN104656129A (en) * | 2015-02-06 | 2015-05-27 | 中国地质大学（北京） | Data transmission method applied to distributed earthquake collection stations |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454674A (en) * | 2013-08-29 | 2013-12-18 | 天津大学 | Data transmission node for geophysical prospecting |
| CN103454674B (en) * | 2013-08-29 | 2016-08-10 | 天津大学 | The data transmission nodal of geophysical exploration |
| CN104656129A (en) * | 2015-02-06 | 2015-05-27 | 中国地质大学（北京） | Data transmission method applied to distributed earthquake collection stations |
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