CN207022038U - A kind of Real-time Seismological Data Transmission system based on stream media technology - Google Patents
A kind of Real-time Seismological Data Transmission system based on stream media technology Download PDFInfo
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- CN207022038U CN207022038U CN201720994042.0U CN201720994042U CN207022038U CN 207022038 U CN207022038 U CN 207022038U CN 201720994042 U CN201720994042 U CN 201720994042U CN 207022038 U CN207022038 U CN 207022038U
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Abstract
It the utility model is related to a kind of Real-time Seismological Data Transmission system based on stream media technology, mainly it is made up of master station, multiple acquisition nodes and multiple radio repeater stations, each acquisition node is connected by radio repeater station with master station respectively, realizes the remote data streaming at pressure break scene.Data in the utility model acquisition node are real-time transmitted to master station in the form of streaming, compared with the File Transfer Protocol generally used is transmitted with document form, reduce the time delay in data transmission procedure, meet the requirement of field pressure break real-time transmission.It, which increases data preprocessing module, had both reduced the data volume of transmission and the use bandwidth of wireless network, realized data flow smooth transport again.Transmission system meets the real-time of field pressure break data transfer, has higher engineering application value.
Description
Technical field
The utility model belongs to transmission of seismic data technical field, and in particular to it is a kind of based on stream media technology in real time
Shake data transmission system.
Background technology
Not only caused data volume is big for seismic prospecting, and also very high to the requirement of real-time of pressure break field data transmission.
At present, transmission of seismic data both domestic and external generally uses File Transfer Protocol, is transmitted in a manner of file download, it is impossible to meets real
The requirement of when property.And stream media technology compensate for this deficiency well, the streaming media transmission technique of comparative maturity is general at present
The RTP/RTSP RTPs being all built upon on udp protocol, it is possible to achieve the real-time Transmission of data.But because of wild environment
Complexity, in addition to unstable networks, along with UDP is towards connectionless transmission characteristic, such method is caused to cause data
Amount lost is big, the high shortcoming of the bit error rate.Therefore, it is badly in need of a kind of system and method that can meet Real-time Seismological Data transmission of research and development.
Chinese patent CN105277972A discloses a kind of earthquake data acquisition and transmission method, proposes the output of dual path
Method, it is to be completely saved in three component seismic data in the storage of collector all the way, for later stage fine processing, another way is extraction
Simple component data are transmitted by wired or wireless mode, are handled for real-time monitoring.Though this method realizes quick processing,
Result can not explanation of seismic event, and without the more real-time data transmission method of proposition comprehensively.
Gu Shuwei exists within 2013《Radio sensing network Research of Routing Algorithm and embedded realization》Built on middle proposition node
Ftp server realizes the method for transmission of seismic data, and has built the software platform of data transfer.Zhao Jin dragons are waited within 2015
《The realization of ftp server based on STM32》In propose ftp server built on seismic detector.The server is functionally
The catalogue that can realize data file in seismic detector is shown, path switching, file download, file are deleted etc..But both the above side
Method realizes data transfer in the form of a file using File Transfer Protocol, and the larger real-time that can not meet transmission of seismic data that is delayed will
Ask.
In summary, though having obtained certain achievement in transmission of seismic data field in the prior art, no matter assisted using FTP
View is transmitted in a manner of file or using the method based on UDP host-host protocols, data transmission delay length, amount of data lost be present
Greatly, the bit error rate is high, the problems such as networking bandwidth availability ratio is low, can not meet the real-time of pressure break field seismic data transfer.
The content of the invention
The purpose of this utility model is that for above-mentioned the deficiencies in the prior art, there is provided a kind of based on stream media technology
Real-time Seismological Data Transmission system, it utilizes RTMP (Real Time Messaging Protocol) agreements by collection in worksite
A large amount of geological datas are real-time transmitted to master station from each acquisition node in the form of streaming and carry out real time data processing；The system uses
The form of compressed encoding, data volume can be both reduced, the robustness of data transfer can be improved again；Use the form of data rectification can be with
Effectively steady network flow velocity, reduces the demand to channel width, so as to avoid the generation of network congestion phenomenon；Utilize RTMP agreements
Realize and data are transmitted in the form of data flow, can both reduce time delay, meet the real-time of data transfer again.
The purpose of this utility model is achieved through the following technical solutions：
A kind of Real-time Seismological Data Transmission system based on stream media technology, mainly by master station, multiple acquisition nodes and
Multiple radio repeater stations are formed, and each acquisition node is connected by radio repeater station with master station respectively, realize pressure break scene
Remote data streaming；
The acquisition node is connected with wave detector, and acquisition node includes data acquisition module, data preprocessing module sum
According to streaming module；The data acquisition module is made up of 32 ADS1282 A/D converters formed, passes through detection
The original earthquake data of device collection passes to data preprocessing module after analog-to-digital conversion；The data preprocessing module is by data
Compression unit and data rectification unit is encoded to form, be sequentially completed data encoding compression, piecemeal encapsulation and code check it is smooth after by number
According to passing to data stream transmitting module；It is wireless that the data stream transmitting module uses RTMP agreements to be carried out with manifold formula and master station
Data transfer, real time data is sent to master station.
The rectification unit is formed using c-type wave filter and L-type filter bank.
The wireless data transmission using WIFI or 4G latticed form.
The transmission method of the above-mentioned Real-time Seismological Data Transmission system based on stream media technology, comprises the following steps：
A, each acquisition node using wave detector collection original earthquake data, data are synchronized with data acquisition module and
After analog/digital conversion, digitized geological data is passed into data preprocessing module, while starts acquisition node RTMP associations
View carries out port snoop；
B, the data encoding compression unit in data preprocessing module utilizes according to data stream format as defined in RTMP agreements
RTMPDump built-in functions carry out coding compression, piecemeal encapsulation to data；
C, the geological data after data rectification unit is encapsulated using c-type wave filter and L-type filter bank model to coding
Stream progress code check is smooth, and passes data to the data stream transmitting module being made up of RTMP agreements；
D, master station is established Socket by RTMP agreements with each acquisition node in distal end and is connected；
E, when master station asks geological data stream to acquisition node, acquisition node uses pretreated data flow
RTMP agreements are sent to master station in real time with WIFI or 4G communication；
F, after master station receives data flow, through re-grouping package, decompression processing realize scene real-time monitoring, analysis conciliate
Release.
Step C, the characteristic function of the c-type wave filter are as follows：
Wherein：Iout(t)、Iin(t) input in t c-type wave filter and output data flow velocity, Q (t) generations are represented respectively
Data volume in table t buffering queue, has according to above formula：
The characteristic function of L-type wave filter is as follows：
Wherein：Q (t) be c-type wave filter provide outgoing data amount, QAVG(t, T1) it is the outgoing data total amount that is averaged in the recent period,
Constant T1, constant T2It is time delay factor, constant L is to add growth factor.
Compared with prior art, the beneficial effects of the utility model are：The utility model is a large amount of for collection in worksite
Geological data, using the form of compressed encoding, data volume can be both reduced, the robustness of data transfer can be improved again；Using data
The method of rectification, can effectively steady network flow velocity, reduce the demand to channel width；Using RTMP protocol realizations with data flow
Form transmission, meet the real-time of data transfer, there is higher engineering application value.
Brief description of the drawings
Fig. 1 acquisition nodes and master station data messaging diagrams；
Fig. 2 acquisition nodes inside and master station data stream transmitting figure；
Fig. 3 data flow pretreatment module figures；
Fig. 4 geological data rectification analogous diagrams；
Fig. 5 RTMP agreement transmitting data stream journey figures.
Embodiment
The utility model provides a kind of Real-time Seismological Data Transmission system based on media streaming techniques.In order that this practicality is new
The object, technical solution and advantage of type are more clearly understood, and the utility model is carried out specifically below in conjunction with Figure of description
It is bright.
As shown in figure 1, acquisition node and master station data messaging diagrams, each acquisition station pass through radio repeater station and master respectively
Control station is connected, and realizes the remote data streaming at pressure break scene.It is with wirelessly connecting, using RTMP agreements by earthquake
Data are real-time transmitted to master station from each acquisition node in the form of streaming, and the side of real time data processing is carried out on master station
Method.
As shown in Fig. 2 acquisition node includes data acquisition module, data preprocessing module and data flow in the Transmission system
Transport module.The module develops completion, and the insertion in the embedded system that STM32F429 processors do main control unit
FreeRTOSv9.0.0 kernels and LwIp network protocol stacks have been transplanted in formula system.
The data stream transmitting module be on the basis of ICP/IP protocol stack, using RTMP agreements carry out with manifold formula with
Master station carries out wireless data transmission.Wherein, wireless transmission method is the form of WIFI or 4G networks.
Data acquisition module is made up of 32 ADS1282 A/D converters formed, main to be responsible for collection seismic wave
Graphic data.
As shown in figure 3, data preprocessing module is made up of data encoding compression and data rectifying part；Wherein, data are compiled
Code compression refers to carry out the coding of corresponding format to the data of collection by the regulation of RTP and data encapsulate；Data are whole
Stream is for the data flow after steady compressed encoding, is prevented in data transmission procedure because code check changes greatly, data burst passes
It is defeated, cause the phenomenon of network congestion.
As shown in Figure 3, Figure 4, acquisition node data can be improved using the built-up pattern of c-type wave filter and L-type wave filter
The stability of stream,
The characteristic function of c-type wave filter is as follows：
Wherein：Iout(t)、Iin(t) input in t c-type wave filter and output data flow velocity, Q (t) generations are represented respectively
Data volume in table t buffering queue.Had according to above formula：
From above formula, c-type wave filter has Memorability, and the outgoing data total amount of certain moment data buffer storage depends not only on
The input and output amount at the moment, and it is relevant with history.In order to ensure that the data total amount cached in acquisition node can maintain one
Stable value, even if Iin(t)=Iout(t), thus data flow can be made not undergo mutation.
The characteristic function of L-type wave filter is as follows：
Wherein：Q (t) be c-type wave filter provide outgoing data amount, QAVG(t, T) is the outgoing data total amount that is averaged in the recent period,
Constant T1, constant T2It is time delay factor, constant L is to add growth factor.
From upper two formula：L-type wave filter can be according to QAVG(t, T1) change, correspondingly regulating networks flow velocity.It is if flat
Equal transmission rate is constantly adjusting, then L-type wave filter also can detect this change, and adjust therewith, so as to enter one
The bandwidth of channel needed for the flow velocity of step stabilizing network and reduction.
After data transmission module is the encoded compression of the data that will collect, piecemeal encapsulation, Socket communication is utilized
Mode is sent real time data by wireless network.The process is to carry out real-time data communication using RTMP agreements.
The RTMP agreements are to be divided into multiple message blocks to be transmitted data message, and each message blocks have build and
Data form, and build is respectively by basic head, message header and expansion time stamp composition.It is as shown in the table：
The message block protocol of table 1
| Basic header | Chunk Msg Header | Time Stamp | Chunk Data |
As shown in figure 5, by taking the actual flow of actual field as an example, the Real-time Seismological Data Transmission system based on stream media technology
And method, comprise the following steps：
A, each acquisition node is transferred to data acquisition module after gathering original earthquake data using wave detector, and data are by same
After step and analog/digital conversion, and digitized geological data is passed into data preprocessing module, while start acquisition station
RTMP agreements carry out port snoop；
B, the data encoding compression unit in data preprocessing module utilizes according to data stream format as defined in RTMP agreements
RTMPDump built-in functions carry out coding compression, piecemeal encapsulation to data；
C, the geological data after data rectification unit is encapsulated using c-type wave filter and L-type filter bank model to coding
Stream progress code check is smooth, and passes data to the data stream transmitting module being made up of RTMP agreements；
The characteristic function of c-type wave filter is as follows：
Wherein：Iout(t)、Iin(t) input in t c-type wave filter and output data flow velocity, Q (t) generations are represented respectively
Data volume in table t buffering queue.Had according to above formula：
The characteristic function of L-type wave filter is as follows：
Wherein：Q (t) be c-type wave filter provide outgoing data amount, QAVG(t, T1) it is the outgoing data total amount that is averaged in the recent period,
Constant T1, constant T2It is time delay factor, constant L is to add growth factor.
D, master station is established Socket by RTMP agreements with each acquisition node in distal end and is connected；
E, when master station asks geological data stream to acquisition node, acquisition node uses pretreated data flow
RTMP agreements are sent to master station in real time with WIFI or 4G communication；
F, after master station receives data flow, realized through the processing such as re-grouping package, decompressing the real-time monitoring at scene, analysis and
Explain.
A kind of Real-time Seismological Data Transmission system based on stream media technology provided by the utility model, in acquisition node
Data are real-time transmitted to master station in the form of streaming, compared with the File Transfer Protocol generally used is transmitted with document form, reduce number
According to the time delay in transmitting procedure, the requirement of field pressure break real-time transmission is met.It, which increases data preprocessing module, both reduced
The data volume of transmission and the use bandwidth of wireless network, realize data flow smooth transport again.This Transmission system is adopted for scene
A large amount of geological datas of collection, using the form of compressed encoding, can both reduce data volume, can improve the robustness of data transfer again；
Using the method for data rectification, can effectively steady network flow velocity, reduce the demand to channel width；Utilize RTMP protocol realizations
Transmitted in the form of data flow, meet the real-time of data transfer, there is higher engineering application value.
Claims (2)
- A kind of 1. Real-time Seismological Data Transmission system based on stream media technology, it is characterised in that：Mainly by master station, multiple adopt Collect node and multiple radio repeater stations are formed, each acquisition node is connected by radio repeater station with master station respectively, is realized The remote data streaming at pressure break scene；The acquisition node is connected with wave detector, and acquisition node includes data acquisition module, data preprocessing module and data flow Transport module；The data acquisition module is made up of 32 ADS1282 A/D converters formed, is adopted by wave detector The original earthquake data of collection passes to data preprocessing module after analog-to-digital conversion；The data preprocessing module is by data encoding Compression unit and data rectification unit are formed, be sequentially completed data encoding compression, piecemeal encapsulation and code check it is smooth after data are passed Data stream transmitting module is passed, wherein rectification unit is formed using c-type wave filter and L-type filter bank；The data spread Defeated module uses RTMP agreements to carry out wireless data transmission with manifold formula and master station, and real time data is sent into master station.
- A kind of 2. Real-time Seismological Data Transmission system based on stream media technology according to claim 1, it is characterised in that： The wireless data transmission using WIFI or 4G network.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123353A (en) * | 2019-12-24 | 2020-05-08 | 中国科学院地质与地球物理研究所 | Real-time seismic data acquisition device, system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123353A (en) * | 2019-12-24 | 2020-05-08 | 中国科学院地质与地球物理研究所 | Real-time seismic data acquisition device, system and method |
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Granted publication date: 20180216 Termination date: 20180810 |