CN104614760A - Multi-processor underground seismic signal acquisition unit data transmission method - Google Patents
Multi-processor underground seismic signal acquisition unit data transmission method Download PDFInfo
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Abstract
The invention relates to a multi-processor underground seismic signal acquisition unit data transmission method. The data control unit is connected in cascade constituting one of the N acquisition unit Relay type data transmission network, the acquisition unit comprising two processors, the processor is responsible Delta Sigma modulator control and data recovery operation, IO processor through a specific port to transmit information, and trigger other operations. The invention dual processor architecture, effective solution to the high-temperature downhole transmission of large amounts of data in real time is difficult. To ensure the reliability of data transmission, so that the entire apparatus can be operated at about 175oC, making the effective dropping depth instrument reaches 5000-7000 meters and deeper. At the same time control the data acquisition and data transmission through the relay type data transmission, and a dual-processor, so that the transmission rate is guaranteed up to 5Mb/s, in the 1k sample rate acquisition unit can be mounted up to 50.
Description
Technical field:
The present invention relates to the system for acquiring seismic data in a kind of geophysical survey, particularly relate to the data transmission method based on multiprocessor of microearthquake signal acquiring system under a kind of hot hole.
Background technology:
What the oil field low permeability oil field transformation of current China was mainly taked is fracturing technique, to improve near-well-bore permeability, increases oil well output.Due to the difference of formation condition and fracturing process, cause fracturing fracture orientation and the long difference of seam, so need monitoring means to understand fracturing effect, to instruct pressing crack construction, for oil field transformation volume increase provides foundation.Down-hole microearthquake data acquisition is significant for instructing pressing crack construction.
Be different from surface seismic signal data acquisition, seismic signals downhole collection is faced with high temperature, the problems such as high pressure.Along with the degree of depth continues to increase, down-hole ambient temperature starts to raise, and pressure starts to increase, and some areas temperature when 5000m left and right, the underground degree of depth can, close to 150 DEG C, make traditional normal temperature instrument and method effectively work.Thus cannot ensure that the floor treatment unit that is uploaded in real time of image data makes an explanation to instruct fracturing.So high-temperature device must be selected, corresponding optimization is done to a whole set of instrument workflow at high temperature under high pressure.
Acoustic logging, the logging methods such as electrical log, mainly connect a joint well-logging probe by logging cable, the data of collection are passed back to terrestrial contr by logging cable, carries out analysis and the explanation of data.And seismic signals downhole collection, need to lay multiple collecting unit, the logging cable do not waited by 5-30 rice between collecting unit is connected.So the speed of data transmission between the collecting unit of down-hole and bandwidth, guarantee instrument is normally worked and seems most important.And be subject to the restriction of high temperature components and parts kind, optimal correction must be made to collection and transmission circuit according to reality.As controlled Deltasigma modulator collection at single-processor, while guarantee acquisition rate, the real-time Transmission of data can not be ensured.Be subject to processing the restriction of device work efficiency on the other hand, enough large transmission bandwidth can not be provided, limit the joint number of down-hole collecting unit.
Summary of the invention:
Object of the present invention is just for above-mentioned the deficiencies in the prior art, proposes the data transmission method between a kind of multiprocessor seismic signals downhole collecting unit.
The object of the invention is to be achieved through the following technical solutions:
By terrestrial contr by logging cable through head harness concatenated data control module A, collecting unit B1, collecting unit B2 ... collecting unit Bn, inter-stage cable bottom is provided with counterweight composition, described collecting unit is connected with data channel through command channel by Deltasigma modulator, command channel is connected with 485 chips by the treated device C of 485 chip, data channel is connected with 485 chips by the treated device D of 485 chip, and Deltasigma modulator and processor C connect and compose.
Data transmission method between multiprocessor seismic signals downhole collecting unit, comprises the following steps:
A, DCU data control unit A pass through logging cable, collecting unit B1, B2, B3......Bn is connected in the mode of cascade, C is comprised in collecting unit, D two panels processor, each processor is connected with two panels 485 chip, 485 chips controlled by C1, C2, C3......Cn, by logging cable, form the command channel of a relay-type transmission data network; 485 chips controlled by D1, D2, D3......Dn pass through logging cable, form the data channel of a relay-type transmission data network, processor C controls Deltasigma modulator and data record, processor C, by SPI serial ports and specific I/O port transmission information between D, and trigger;
B, to be issued by DCU data control unit A, the information transmitted by command channel is packaged into command frame, and in collecting unit, processor C is after the frame that receives orders, the order that resolution data control module A sends, after performing the corresponding command, order is reached next collection collecting unit.The data channel be made up of the processor D in collecting unit transmits two kinds of frame data, is respectively Frame and acknowledgement frame, the data that Frame encapsulation Deltasigma modulator gathers; Acknowledgement frame package handler C needs the data passing back to control module A, passes back to DCU data control unit A after encapsulation by data channel;
C, controlled to initiate arrangement by DCU data control unit A, DCU data control unit A is each collecting unit respectively allocation address.DCU data control unit A crosses command channel, transmitting order to lower levels frame.In collecting unit, processor C is after resolve command frame, and can generate a unique address number by adding up to this collecting unit, after address assignment success, processor D, can generate acknowledgement frame, passes information back to numerical control unit A by data channel.Processor C meeting reorganization order frame, be delivered to next collecting unit, the like, all collecting units all can be assigned with address number, if final section collecting unit, then in the status information of acknowledgement frame, set trailing flags position, notification data control module A always total a few joint collecting unit is connected with numerical control unit;
After d, address assignment complete, DCU data control unit A controls collecting unit B and enters into collection standby mode, DCU data control unit A is under the control of terrestrial contr, launch when setting-up time arrives and gather enabling pulse, collecting unit B, after receiving trigger action, gathers by processor C controls Deltasigma modulator.
E, processor C, after control Deltasigma modulator starts to gather, can record the number of times of collection, after often gathering 5 times, the data that 5 times gather are packaged into Frame.And send processor D to by SPI serial ports.
Two kinds of duties are divided into after the Frame that f, processor D send at receiving processor C.If this collecting unit is final unit, receive processor C send Frame after, directly by data channel by supreme for a data upload collecting unit.If this collecting unit is non-final unit, then enter relay pattern, processor C can next Frame of being uploaded by data channel of joint collecting unit of first wait-receiving mode, after data frame receipt completes, the Frame that this level processor C sends is spliced to the afterbody of the Frame received, forms new Frame.After new Frame has spliced, retell new Frame and be uploaded to a upper collecting unit by data channel.
G, numerical control unit receive the sequence of data frames that collecting unit is uploaded by data channel.And by sequence of data frames Reseal, be uploaded to terrestrial contr by the logging cable of km level length, resolved by terrestrial contr, packing, conversion and storage.
Beneficial effect: by dual processor framework, effectively solves the problem of big data quantity real-time Transmission difficulty under hot hole.Ensure that the reliability that data are transmitted, make a whole set of instrument about 175 DEG C work, to make effective test degree of depth of instrument reach 5000-7000 rice even darker.Transmitted by relay-type data simultaneously, and dual processor control data collection and data transmission respectively, transfer rate is guaranteed can reach 5Mb/s, under 1k sampling rate, can reach 50 joints by carry collecting unit.
Accompanying drawing illustrates:
Accompanying drawing 1: terrestrial contr, DCU data control unit, collecting unit connection layout.
Accompanying drawing 2: down-hole collecting unit structured flowchart.
Accompanying drawing 3: numerical control unit controls to set up arrangement process flow diagram
Accompanying drawing 4: collecting unit dual processor data transmission stream journey figure.
Accompanying drawing 5: protocol information frame assumption diagram.
Embodiment:
Be described in further detail below in conjunction with drawings and Examples:
Data transmission method between multiprocessor seismic signals downhole collecting unit, by terrestrial contr by logging cable through head harness concatenated data control module A, collecting unit B1, collecting unit B2 ... collecting unit Bn, inter-stage cable bottom is provided with counterweight composition, described collecting unit is connected with data channel through command channel by Deltasigma modulator, command channel is connected with 485 chips by the treated device C of 485 chip, data channel is connected with 485 chips by the treated device D of 485 chip, and Deltasigma modulator and processor C connect and compose.
Down-hole microearthquake collecting transmitter is by terrestrial contr by km level logging cable connecting downhole DCU data control unit, connects 1 ~ 50 data acquisition unit and form under numerical control unit.The logging cable do not waited by 5 ~ 30 meters between collecting unit is connected, and forms down-hole microearthquake data acquisition chain.
DCU data control unit A responds the control command that terrestrial contr is assigned, control the configuration of collecting unit B1, B2, B3......Bn, test and collection, the data uploaded by collecting unit are resolved simultaneously, judge the frame pattern received, if acknowledgement frame, by resolving, judge the implementation status of each collecting unit to issued order, and record collecting unit address, gather the related datas such as joint number.If Frame, then according to collecting unit address, data are reconstructed by resolution data bag.After data Reseal, new packet is uploaded to terrestrial contr by logging cable by DCU data control unit, carries out Data Analysis by terrestrial contr, stores, the sequence of operations such as display;
DCU data control unit A is physically connected with collecting unit B1, B2, B3......Bn, and DCU data control unit A is on whole link top, and the several sections of collecting unit of carry forms collection link successively downwards, and collecting unit interval is adjustable to tens meters by several meters.Each collecting unit is controlled by numerical control unit, distribute the address of each collecting unit from top to bottom successively, after address assignment success, local information is uploaded to numerical control unit by each collecting unit, if final section collecting unit, then in status information, set trailing flags position, notice numerical control pipe nipple always total a few joint collecting unit is connected with numerical control unit.
After address assignment, each collecting unit is all in waiting status.The command frame that processor C is issued by resolution data control module A, judges current required mode of operation.Mode of operation is divided into the pattern of setting, test pattern and drainage pattern.
Under arranging pattern, primary processor waits for the command frame of numerical control unit, arranges the sampling rate of collecting unit, front-end gain, data transfer mode etc.Arrange successfully, send response frame Give numerical control unit by processor D along data channel; Under test pattern, control test circuit by primary processor and produce test waveform, after being sampled by Deltasigma modulator, be uploaded to numerical control unit, concrete gather and data transfer mode with the working method of collecting unit under drainage pattern.Arranging pattern and test pattern after accomplishing the setting up, collecting unit enters single waiting status, waits for the collection enabling pulse that numerical control unit issues.
Data transmission method between multiprocessor seismic signals downhole collecting unit, comprises the following steps:
A, DCU data control unit A pass through logging cable, collecting unit B1, B2, B3......Bn is connected in the mode of cascade, C is comprised in collecting unit, D two panels processor, each processor is connected with two panels 485 chip, 485 chips controlled by C1, C2, C3......Cn, by logging cable, form the data network of a relay-type transmission, are called command channel.485 chips controlled by D1, D2, D3......Dn, by logging cable, form the data network of a relay-type transmission, are called data channel.Simultaneous processor C is also responsible for the control of Deltasigma modulator, and the operation such as data record, by SPI serial ports and specific I/O port transmission information between processor C, D, and carries out the operations such as triggering.
B, to be issued by DCU data control unit A, the information transmitted by command channel is packaged into command frame, and in collecting unit, processor C is after the frame that receives orders, the order that resolution data control module A sends, after performing the corresponding command, order is reached next collection collecting unit.The data channel be made up of the processor D in collecting unit transmits two kinds of frame data, is respectively Frame and acknowledgement frame, the data that Frame encapsulation Deltasigma modulator gathers; Acknowledgement frame package handler C needs the data passing back to control module A, passes back to DCU data control unit A after encapsulation by data channel;
C, controlled to initiate arrangement by DCU data control unit A, DCU data control unit A is each collecting unit respectively allocation address.DCU data control unit A crosses command channel, transmitting order to lower levels frame.In collecting unit, processor C is after resolve command frame, and can generate a unique address number by adding up to this collecting unit, after address assignment success, processor D, can generate acknowledgement frame, passes information back to numerical control unit A by data channel.Processor C meeting reorganization order frame, be delivered to next collecting unit, the like, all collecting units all can be assigned with address number, if final section collecting unit, then in the status information of acknowledgement frame, set trailing flags position, notification data control module A always total a few joint collecting unit is connected with numerical control unit;
After d, address assignment complete, DCU data control unit A controls collecting unit B and enters into collection standby mode, DCU data control unit A is under the control of terrestrial contr, launch when setting-up time arrives and gather enabling pulse, collecting unit B, after receiving trigger action, gathers by processor C controls Deltasigma modulator.
E, processor C, after control Deltasigma modulator starts to gather, can record the number of times of collection, after often gathering 5 times, the data that 5 times gather are packaged into Frame.And send processor D to by SPI serial ports.
Two kinds of duties are divided into after the Frame that f, processor D send at receiving processor C.If this collecting unit is final unit, receive processor C send Frame after, directly by data channel by supreme for a data upload collecting unit.If this collecting unit is non-final unit, then enter relay pattern, processor C can next Frame of being uploaded by data channel of joint collecting unit of first wait-receiving mode, after data frame receipt completes, the Frame that this level processor C sends is spliced to the afterbody of the Frame received, forms new Frame.After new Frame has spliced, retell new Frame and be uploaded to a upper collecting unit by data channel.
G, numerical control unit receive the sequence of data frames that collecting unit is uploaded by data channel.And by sequence of data frames Reseal, be uploaded to terrestrial contr by the logging cable of km level length, resolved by terrestrial contr, packing, conversion and storage.
Will carry out information interaction multiple adopting between unit, application layer protocol is absolutely necessary.Data transmission between collecting unit has command frame, and Frame and acknowledgement frame three class, its application layer protocol as shown in drawings.
All frame types all have identical frame head structure, and wherein, order ID represents current transmitted command type; When task ID is to support that collecting unit runs multiple order simultaneously, identify different task and the mark that adopts, be used for representing the Frame or acknowledgement frame that return, belonging to which task is arranged; Property ID is then used to identify present frame type, and whether data are compressed, and orders information such as whether running succeeded.
Command frame is handed down to each collecting unit by numerical control unit, and ID represents that the frame type of current transmission is command frame, and N represents address number, and which address addr represents.Last Para is the parameter of order, and order has parameter again, and what have does not have, and depends on order ID.
Frame after completing collection, passes data back numerical control unit and the class frame designed to collecting unit.Frame has fixing length, is also frame the longest in whole data transmission system.Same ID represents that the frame type of current transmission is Frame, and Type is station body type, and Time is frame number, identifies for during numerical control unit data reconstruction.
Acknowledgement frame is relatively simple for structure, represents that the frame type of current transmission is Frame, and Type is station body type, and Para represents the content of acknowledgement frame, and content and length determined according to order ID and parameter.
Numerical control unit is in the collection incipient stage, and transmitting order to lower levels control frame, controls collecting unit configuration and test.At the acknowledgement frame that each collecting unit of parsing is uploaded, after determining configuration successful and test normally, numerical control unit enters and singly gathers waiting status.Under the control of terrestrial contr time server, numerical control unit, when starting to gather, issues collection enabling pulse to each collecting unit, enters into data frame receipt state afterwards.After receiving Frame, according to station type and the frame sequence of Frame, data Reseal is gathered.Afterwards, by protocol conversion, via 7 core logging cables, send data to terrestrial contr.Received data, according to concrete setting, are preserved into source document, and are converted segd to according to demand by the upper computer software of terrestrial contr, and form conventional in the seismic prospectings such as seg2, is convenient to the operation such as data processing and display.
Claims (2)
1. the data transmission method between a multiprocessor seismic signals downhole collecting unit, by terrestrial contr by logging cable through head harness concatenated data control module A, collecting unit B1, collecting unit B2 ... collecting unit Bn, inter-stage cable bottom is provided with counterweight composition, described collecting unit is connected with data channel through command channel by Deltasigma modulator, command channel is connected with 485 chips by the treated device C of 485 chip, data channel is connected with 485 chips by the treated device D of 485 chip, and Deltasigma modulator and processor C connect and compose.
2., according to the data transmission method between multiprocessor seismic signals downhole collecting unit according to claim 1, it is characterized in that, comprise the following steps:
A, DCU data control unit A pass through logging cable, collecting unit B1, B2, B3......Bn is connected in the mode of cascade, C is comprised in collecting unit, D two panels processor, each processor is connected with two panels 485 chip, 485 chips controlled by C1, C2, C3......Cn, by logging cable, form the command channel of a relay-type transmission data network; 485 chips controlled by D1, D2, D3......Dn pass through logging cable, form the data channel of a relay-type transmission data network, processor C controls Deltasigma modulator and data record, processor C, by SPI serial ports and specific I/O port transmission information between D, and trigger;
B, to be issued by DCU data control unit A, the information transmitted by command channel is packaged into command frame, and in collecting unit, processor C is after the frame that receives orders, the order that resolution data control module A sends, after performing the corresponding command, order is reached next collection collecting unit.The data channel be made up of the processor D in collecting unit transmits two kinds of frame data, is respectively Frame and acknowledgement frame, the data that Frame encapsulation Deltasigma modulator gathers; Acknowledgement frame package handler C needs the data passing back to control module A, passes back to DCU data control unit A after encapsulation by data channel;
C, controlled to initiate arrangement by DCU data control unit A, DCU data control unit A is each collecting unit respectively allocation address.DCU data control unit A crosses command channel, transmitting order to lower levels frame.In collecting unit, processor C is after resolve command frame, and can generate a unique address number by adding up to this collecting unit, after address assignment success, processor D, can generate acknowledgement frame, passes information back to numerical control unit A by data channel.Processor C meeting reorganization order frame, be delivered to next collecting unit, the like, all collecting units all can be assigned with address number, if final section collecting unit, then in the status information of acknowledgement frame, set trailing flags position, notification data control module A always total a few joint collecting unit is connected with numerical control unit;
After d, address assignment complete, DCU data control unit A controls collecting unit B and enters into collection standby mode, DCU data control unit A is under the control of terrestrial contr, launch when setting-up time arrives and gather enabling pulse, collecting unit B, after receiving trigger action, gathers by processor C controls Deltasigma modulator.
E, processor C, after control Deltasigma modulator starts to gather, can record the number of times of collection, after often gathering 5 times, the data that 5 times gather are packaged into Frame.And send processor D to by SPI serial ports.
Two kinds of duties are divided into after the Frame that f, processor D send at receiving processor C.If this collecting unit is final unit, receive processor C send Frame after, directly by data channel by supreme for a data upload collecting unit.If this collecting unit is non-final unit, then enter relay pattern, processor C can next Frame of being uploaded by data channel of joint collecting unit of first wait-receiving mode, after data frame receipt completes, the Frame that this level processor C sends is spliced to the afterbody of the Frame received, forms new Frame.After new Frame has spliced, retell new Frame and be uploaded to a upper collecting unit by data channel.
G, numerical control unit receive the sequence of data frames that collecting unit is uploaded by data channel.And by sequence of data frames Reseal, be uploaded to terrestrial contr by the logging cable of km level length, resolved by terrestrial contr, packing, conversion and storage.
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| CN109286423A (en) * | 2018-09-28 | 2019-01-29 | 中南大学 | A kind of either simplex two-way carrier communication device based on mountain area exploration receiver |
| CN112799124A (en) * | 2020-12-30 | 2021-05-14 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Data transmission method and device for distributed seismic exploration and acquisition system |
| CN113393655A (en) * | 2021-06-09 | 2021-09-14 | 国网山东省电力公司东平县供电公司 | Power transmission line monitoring system fusing wireless private network communication |
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| CN112799124A (en) * | 2020-12-30 | 2021-05-14 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Data transmission method and device for distributed seismic exploration and acquisition system |
| CN113393655A (en) * | 2021-06-09 | 2021-09-14 | 国网山东省电力公司东平县供电公司 | Power transmission line monitoring system fusing wireless private network communication |
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