CN102404764A - Wireless network observation method and system for three-dimensional electromagnetic exploration - Google Patents
Wireless network observation method and system for three-dimensional electromagnetic exploration Download PDFInfo
- Publication number
- CN102404764A CN102404764A CN2011103578185A CN201110357818A CN102404764A CN 102404764 A CN102404764 A CN 102404764A CN 2011103578185 A CN2011103578185 A CN 2011103578185A CN 201110357818 A CN201110357818 A CN 201110357818A CN 102404764 A CN102404764 A CN 102404764A
- Authority
- CN
- China
- Prior art keywords
- observation
- data
- module
- sensor node
- wireless network
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a wireless network observation method and system for three-dimensional electromagnetic exploration. The electromagnetic field data is collected by simple sensor nodes scattered in the measured zone; the data is then transmitted to the data convergence node by the ad hoc network composed of the nodes to form a complete wireless sensor network; the remote control end controls the data collection of the observed network through the data convergence node in the measured zone. The wireless network observation method and system can realize large-area wireless collection of the three-dimensional electromagnetic data economically and feasibly for providing economical, convenient, feasible and effective data collecting method for three-dimensional electromagnetic exploration as well as improve the interference resistance of data collection, reduce error and improve quality of the observed data.
Description
Technical field
The present invention relates to a kind of wireless network observation procedure and system that is used for the 3 D electromagnetic exploration.
Background technology
Electromagnetic survey particularly has irreplaceable advantage aspect the mineral metal products resource exploration at resource exploration, and has also brought into play more and more important effect at aspects such as petroleum resources exploration, underground DEEP STRUCTURE research, earthquake monitoring and predictions.Because depth of exploration continues to increase, purpose is increasingly sophisticated, presses for to carry out the higher three-dimensional exploitation method of resolution.
V-5-2000 mt system of the MT-24NS mt system of present many electromagnetic survey instruments such as U.S. EMI company and Canadian Phoenix company etc. has been equipped with the function that three-dimensional observation is carried out in the multiple devices networking.But, restricted carrying out of extensive large-area three-dimensional data acquisition owing to the complex structure of these instruments own, involve great expense.The three-dimensional observation of high density, area property, big data quantity needs miniaturization, lighting, observation device that cost is low, just might drop into a large amount of survey station points simultaneously.
Summary of the invention
Technical problem to be solved by this invention provides a kind of wireless network observation procedure and system that is used for the 3 D electromagnetic exploration; Wireless network observation procedure and the system that is used for the 3 D electromagnetic exploration of the present invention; Have easy to implement, high, the strong characteristics of flexibility of observed efficiency.
The technical solution of invention is following:
A kind of wireless network observation system that is used for the 3 D electromagnetic exploration comprises wireless observation grid and remote control terminal equipment; Wireless observation grid is communicated by letter with the remote control terminal equipment wireless and is connected; Wireless observation grid is arranged in the area of observation coverage;
Wireless observation grid compiles node by data and a plurality of sensor node is formed; Adjacent sensor node connects through wireless communication link communication; The convergence node is communicated by letter through wireless communication link with the sensor node that closes on the convergence node and is connected;
Sensor node obtains E
x, E
y, H
x, H
yAnd H
zIn wantonly 1 or 2 components; Wherein, E
xAnd E
yBe respectively the x component and the y component of electric field strength at the observation station place at sensor node place; H
x, H
yAnd H
zBe respectively x component, y component and the z component of magnetic field intensity at the observation station place at sensor node place, sensor node also obtains the space coordinates information of place measuring point.
Described sensor node comprises control module, acquisition module, GPS module, power module and communication module; Acquisition module, GPS module, power module and communication module all are connected with control module; Acquisition module comprises transducer and A/D converter, and transducer is electrode or bar magnet.
The convergence node comprises control treatment module, memory module, local communication module, remote communication module and power module; Described memory module, local communication module, remote communication module and power module all are connected with control treatment module.
Have normalizing gridding processing unit in the remote control terminal equipment, this normalizing gridding processing unit carries out the normalizing gridding based on the observation data that interpolation will be surveyed random distribution in the district.(the normalizing gridding mainly be utilize in the geophysical exploration commonly used to methods such as least square method, spline function interpolation method, Ke Lijinfa carry out interpolation)
A kind of wireless network observation procedure that is used for the 3 D electromagnetic exploration adopts the aforesaid wireless network observation system that is used for the 3 D electromagnetic exploration; The wireless network observation procedure that is used for the 3 D electromagnetic exploration may further comprise the steps:
Step 1: data are obtained and transmitted: sensor node is gathered observation data and space coordinates information, and this observation data and space coordinates information are transferred to remote control terminal equipment through wireless communication link through the convergence node, and described observation data is E
x, E
y, H
x, H
yAnd H
zIn wantonly 1 or 2 components;
Step 2: remote control terminal equipment carries out normalizing gridding processing with observation data that receives and space coordinates information based on interpolation, obtains normalization three-dimensional detection data.
The described wireless network observation procedure that is used for the 3 D electromagnetic exploration also comprises step 3: calculate apparent resistivity: remote control terminal equipment is accomplished the 3 D electromagnetic exploration based on described normalization three-dimensional detection data computation apparent resistivity.
The observation data of sensor node collection is E
xAnd H
ySpace coordinates information is gps data;
Apparent resistivity calculates and adopts the Ka Niya calculation formula of apparent resistivity:
ω is the angular frequency of measured signal; μ is that (μ is taken as 4 π * 10 usually for the magnetic permeability of the earth
-7H/m).
The observation data of sensor node collection is E
xAnd H
ySpace coordinates information is gps data; Apparent resistivity calculates and adopts ripple district calculation formula of apparent resistivity:
R is the distance that observation station arrives the galvanic couple source in the formula, and I is a galvanic couple source current strength, dL galvanic couple source length,
Angle for observation station and galvanic couple source.
Adopt data packet communication between convergence node and the sensor node and between the sensor node, packet comprises following field: sensor node identification code, gps coordinate, acquisition time and observation data.
The apparent resistivity computing unit that has the data computation apparent resistivity that obtains according to sensor node in the remote control terminal equipment.
Technical conceive of the present invention:
Electromagnetic survey generally is to infer underground medium conductivity situation through observe natural field source or the response of artificial field source in the underground medium of target area calculate on the face of land.Medium conductivity is used apparent resistivity ρ always
sExpression.The electromagnetic response of ground observation generally is each component part of electric field and magnetic field intensity, comprises E
x, E
y, H
x, H
yAnd H
zRelation between them can be represented with following general formula:
ρ
s＝f{g
1(E
x)，g
2(E
y)，g
3(H
x)，g
4(H
y)，g
5(H
z)} (1)
In a lot of occasions, only need observation E
x, E
y, H
x, H
yAnd H
zIn 1 or 2 components just can calculate apparent resistivity, such as Ka Ni Asian TV Station resistivity formula:
Also have ripple district calculation formula of apparent resistivity: r is the distance that observation station arrives the galvanic couple source in
formula; I is a galvanic couple source current strength; DL galvanic couple source length,
is the angle in observation station and galvanic couple source.
Therefore the present invention arranges that a series of simple sensor is gathered electric field or magnetic field data is realized 3 D electromagnetic observation.
Beneficial effect:
Because wireless network observation procedure and the system that is used for the 3 D electromagnetic exploration of the present invention adopts wireless senser, broken away from the cable of the numerous and diverse heaviness of traditional observation procedure; Make exploration device easy; Measuring point is easy to arrange, is convenient to carry out large-area three-dimensional observation, and field work efficient is high.
Sensor node real-time time coordinate data makes that the layout of node can random scatter, further improves field work efficient.
Wireless ad hoc network has dynamic network route maintenance function, makes observation grid have higher field survivorship ability, can not influence network function because of the inefficacy of individual nodes, and adaptivity is good.
A large amount of sensor nodes is arranged can obtain a large amount of observation datas, and data are that data processing and inverting provide more selection with convenient.
Electromagnetic field data of the present invention is surveyed the interior simple sensor node collection in district by being dispersed in, and is transferred to the convergence node through the ad-hoc network of each node formation, constitutes a complete wireless sensor network.Remote control terminal is through surveying the data acquisition of the convergence node control observation grid in the district.But use the present invention's economically feasible ground to realize the large tracts of land wireless collection of 3 D electromagnetic data; Explore on the one hand economic, convenient, feasible, collecting method efficiently is provided for 3 D electromagnetic; Strengthen simultaneously the antijamming capability of data acquisition again, thereby reduced error, raising observation data quality.In addition, because the data volume of gathering is more, utilizes the observation data of adjacent node to proofread checking mutually and also can reduce error, improve the observation data quality.
The very convenient follow-up data of data after the normalizing gridding is handled, because most of two and three dimensions inversion method all needs gridded data.
Description of drawings
Fig. 1 wireless network observation sketch map;
Fig. 2 sensor node structured flowchart;
Fig. 3 convergence node structure block diagram;
Fig. 4 surveys district's observer nodes and arranges sketch map;
Fig. 5 is wireless survey grid sketch map;
Fig. 6 observation data normalizing gridding sketch map;
Fig. 7 wireless network observation schematic flow sheet.
The wireless observation grid of label declaration: 1-, 2-remote control terminal equipment, the 3-sensor node, the 4-data are compiled node, the 5-wireless communication link.
Embodiment
Below will combine accompanying drawing and specific embodiment that the present invention is explained further details:
Embodiment 1:
Transducer is an emf sensor, like electrode or bar magnet, can collect a series of each component part of electric field and magnetic field data.
Emf sensor is added communication function, just become wireless sensor network node, be called for short sensor node.Each sensor node can provide E to observation grid
x, E
y, H
x, H
yOr H
zIn a parameter, and the three-dimensional coordinate and the parameter acquisition time of this node are provided simultaneously.Sensor node is made up of acquisition module, GPS module, control module, communication module and power module 5 parts, sees Fig. 2.Acquisition module mainly is made up of A/D converter, is electric field or magnetic field digital signal with electrode or bar magnet analog signal conversion.The GPS module mainly provides the three-dimensional coordinate of node position.Control module mainly comprises processor and memory, control coordination, data processing and the storage of each module of responsible node.Communication module provides short-distance wireless duplex communication link, and has unique identification sign indicating number (IP address), so that carry out group-net communication with other adjacent node.Power module is that each functional module of node provides power supply.
Survey the district for one one or more convergence nodes also need be set.The convergence node has the stronger control treatment module of function and larger capacity, and (computing speed can satisfy the requirement of ad-hoc network routing node, and memory capacity can satisfy the observation data of storage some, is conventional configuration.) data memory module, and except having the short-range wireless communication module identical, also have long distance wireless communication module or wire communication module with sensor node, see Fig. 3.Data memory module is used for storing surveying distinguishes the observation data bag that interior each sensor node sends.Short-range communication module realizes and surveys district's inner sensor node establishment ad-hoc network.Long distance wireless communication module or wire communication module realize the remote transmission of observation data and the control of survey grid.
Sensor node is randomly dispersed in the observation area; Scattering density is confirmed by the measuring point distance of concrete observation requirements; (owing to adopt wireless mode, the some distance in the time of generally can be less than conventional survey strengthens survey grid density and can be as the remarkable increase exploration cost of conventional survey method.Highdensity data can improve the accuracy that data information is explained.) see Fig. 4.All the sensors node and the convergence node surveyed in the district form a local MANET through wireless communication module.Sensor network adopts the wireless self-networking agreement of comparative maturity, like DSDV (Destination Sequenced Distance Vector) agreement etc., forms consistent link and carries out data packet delivery, sees Fig. 5.
Electric field or magnetic field data (E that sensor node is gathered
x, E
y, H
x, H
yOr H
z) and coordinate time data etc. all be packaged into packet by consolidation form, mail to the convergence node through ad-hoc network by setting program.
Data packet format is following:
| Data head | The node identification sign indicating number | Coordinate | Time | Observation data | The data tail |
After data acquisition finishes, because each measured value all has three-dimensional coordinate, multiple interpolation means capable of using will be surveyed the observation data of random distribution in the district and carry out normalizing gridding processing (see figure 6), so that handle with the three-dimensional data of carrying out routine.Interpolation method is least square method, spline function interpolation method, Ke Lijinfa etc.
The normalizing gridding mainly utilizes the interpolation means to realize, and interpolation method commonly used when being the geophysical exploration data processing.
In the observation of three-dimensional exploration wireless network, observer nodes is arranged as shown in Figure 3.The ready back of source preparation on the scene (natural observation then need not to prepare) just can start observation grid and carry out data acquisition.Particular flow sheet is seen Fig. 7.
Observer nodes can by certain density at random uniformly dispersing in surveying the district, connect the external electrode or the bar magnet of sensor node; Route discovery procedure on start sensor node and the convergence node; Set up and comprise all nodes at interior wireless ad hoc network, and the Dynamic Maintenance network link; The convergence node will instruct to be broadcast to all the sensors node through ad-hoc network after receiving the control command of remote activation collection; Sensor node is by instruction beginning data acquisition, and collection is mail to the convergence node with data packet form after accomplishing automatically; The convergence node is stored all packets and is sent to remote control terminal by teleinstruction; Remote control terminal needs to extract the data in the packet by exploration and carries out the normalizing gridding and handle, and generates conventional electromagnetic survey measuring point data, handles and inverting so that carry out conventional three-dimensional data.The final wireless network formula data observation of accomplishing the 3 D electromagnetic exploration.
Claims (9)
1. a wireless network observation system that is used for the 3 D electromagnetic exploration is characterized in that, comprises wireless observation grid and remote control terminal equipment; Wireless observation grid is communicated by letter with the remote control terminal equipment wireless and is connected; Wireless observation grid is arranged in the area of observation coverage;
Wireless observation grid compiles node by data and a plurality of sensor node is formed; Adjacent sensor node connects through wireless communication link communication; The convergence node is communicated by letter through wireless communication link with the sensor node that closes on the convergence node and is connected;
Sensor node obtains E
x, E
y, H
x, H
yAnd H
zIn wantonly 1 or 2 components; Wherein, E
xAnd E
yBe respectively the x component and the y component of electric field strength at the observation station place at sensor node place; H
x, H
yAnd H
zBe respectively x component, y component and the z component of magnetic field intensity at the observation station place at sensor node place, sensor node also obtains the space coordinates information of place measuring point.
2. the wireless network observation system that is used for the 3 D electromagnetic exploration according to claim 1 is characterized in that described sensor node comprises control module, acquisition module, GPS module, power module and communication module; Acquisition module, GPS module, power module and communication module all are connected with control module; Acquisition module comprises transducer and A/D converter, and transducer is electrode or bar magnet.
3. the wireless network observation system that is used for the 3 D electromagnetic exploration according to claim 2 is characterized in that the convergence node comprises control treatment module, memory module, local communication module, remote communication module and power module; Described memory module, local communication module, remote communication module and power module all are connected with control treatment module.
4. the wireless network observation system that is used for the 3 D electromagnetic exploration according to claim 3; It is characterized in that; Have normalizing gridding processing unit in the remote control terminal equipment, this normalizing gridding processing unit carries out the normalizing gridding based on the observation data that interpolation will be surveyed random distribution in the district.
5. a wireless network observation procedure that is used for the 3 D electromagnetic exploration is characterized in that, adopts the described wireless network observation system that is used for the 3 D electromagnetic exploration of claim 4; The wireless network observation procedure that is used for the 3 D electromagnetic exploration may further comprise the steps:
Step 1: data are obtained and transmitted: sensor node is gathered observation data and space coordinates information, and this observation data and space coordinates information are transferred to remote control terminal equipment through wireless communication link through the convergence node, and described observation data is E
x, E
y, H
x, H
yAnd H
zIn wantonly 1 or 2 components;
Step 2: remote control terminal equipment carries out normalizing gridding processing with observation data that receives and space coordinates information based on interpolation, obtains normalization three-dimensional detection data.
6. the wireless network observation procedure that is used for the 3 D electromagnetic exploration according to claim 5; It is characterized in that; Also comprise step 3: calculate apparent resistivity: remote control terminal equipment is accomplished the 3 D electromagnetic exploration based on described normalization three-dimensional detection data computation apparent resistivity.
7. the wireless network observation procedure that is used for the 3 D electromagnetic exploration according to claim 6 is characterized in that the observation data of sensor node collection is E
xAnd H
ySpace coordinates information is gps data;
Apparent resistivity calculates and adopts the Ka Niya calculation formula of apparent resistivity:
ω is the angular frequency of measured signal; μ is the magnetic permeability of the earth.
8. the wireless network observation procedure that is used for the 3 D electromagnetic exploration according to claim 6 is characterized in that the observation data of sensor node collection is E
xAnd H
ySpace coordinates information is gps data; Apparent resistivity calculates and adopts ripple district calculation formula of apparent resistivity:
R is the distance that observation station arrives the galvanic couple source in the formula, and I is a galvanic couple source current strength, dL galvanic couple source length,
Angle for observation station and galvanic couple source.
9. according to claim 7 or the 8 described wireless network observation procedures that are used for the 3 D electromagnetic exploration, it is characterized in that,
Adopt data packet communication between convergence node and the sensor node and between the sensor node, packet comprises following field: sensor node identification code, gps coordinate, acquisition time and observation data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103578185A CN102404764A (en) | 2011-11-11 | 2011-11-11 | Wireless network observation method and system for three-dimensional electromagnetic exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103578185A CN102404764A (en) | 2011-11-11 | 2011-11-11 | Wireless network observation method and system for three-dimensional electromagnetic exploration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102404764A true CN102404764A (en) | 2012-04-04 |
Family
ID=45886443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103578185A Pending CN102404764A (en) | 2011-11-11 | 2011-11-11 | Wireless network observation method and system for three-dimensional electromagnetic exploration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102404764A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104618137A (en) * | 2014-12-25 | 2015-05-13 | 中国海洋石油总公司 | Method and device for realizing towing exploration control network |
| CN104749645A (en) * | 2015-04-09 | 2015-07-01 | 中国科学院地质与地球物理研究所 | Method and device for detecting fluctuation shape of top interface of Ordovician limestone of substrate of coal bed |
| CN106408914A (en) * | 2016-10-18 | 2017-02-15 | 武汉市工程科学技术研究院 | Wireless time synchronizing system for exploration instrument and synchronization realizing method thereof |
| CN106872794A (en) * | 2017-01-09 | 2017-06-20 | 佳禾智能科技股份有限公司 | The signal strength test system and method for testing of a kind of radio communication product |
| CN107274648A (en) * | 2017-06-05 | 2017-10-20 | 东北师范大学 | A kind of telluric electromagnetic sounding data transfer and monitoring method based on technology of Internet of things |
| CN108873074A (en) * | 2018-04-18 | 2018-11-23 | 浙江大学 | A kind of three-dimensional high-density method of measuring resistivity and exploration system based on electrode random distribution |
| CN112649878A (en) * | 2020-09-11 | 2021-04-13 | 中国地质调查局成都地质调查中心 | Magnetotelluric sounding-based field automatic observation recording method |
| WO2022095338A1 (en) * | 2020-11-06 | 2022-05-12 | 浙江大学 | Urban road administration and transportation power supply network-based random distributed resistivity sensing system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110031752A (en) * | 2009-09-21 | 2011-03-29 | 부산대학교 산학협력단 | Method and apparatus for detecting sybil attack node using localization information and hash chain in ubiquitous sensor networks |
| CN102026227A (en) * | 2010-12-14 | 2011-04-20 | 广州市香港科大霍英东研究院 | Distributed deployment method for large-scale wireless sensor network testing and debugging |
-
2011
- 2011-11-11 CN CN2011103578185A patent/CN102404764A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110031752A (en) * | 2009-09-21 | 2011-03-29 | 부산대학교 산학협력단 | Method and apparatus for detecting sybil attack node using localization information and hash chain in ubiquitous sensor networks |
| CN102026227A (en) * | 2010-12-14 | 2011-04-20 | 广州市香港科大霍英东研究院 | Distributed deployment method for large-scale wireless sensor network testing and debugging |
Non-Patent Citations (2)
| Title |
|---|
| 徐汶东等: "无线传感器网络技术在分布式电磁探测系统中的应用", 《计算机测量与控制》, vol. 19, no. 9, 30 September 2011 (2011-09-30) * |
| 李忠等: "高精度电磁频谱技术及其在矿产勘探中的应用", 《北京科技大学学报》, vol. 29, no. 6, 30 June 2007 (2007-06-30) * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104618137A (en) * | 2014-12-25 | 2015-05-13 | 中国海洋石油总公司 | Method and device for realizing towing exploration control network |
| CN104618137B (en) * | 2014-12-25 | 2018-03-23 | 中国海洋石油总公司 | A kind of implementation method and equipment of towing cable exploration control network |
| CN104749645A (en) * | 2015-04-09 | 2015-07-01 | 中国科学院地质与地球物理研究所 | Method and device for detecting fluctuation shape of top interface of Ordovician limestone of substrate of coal bed |
| CN106408914A (en) * | 2016-10-18 | 2017-02-15 | 武汉市工程科学技术研究院 | Wireless time synchronizing system for exploration instrument and synchronization realizing method thereof |
| CN106872794A (en) * | 2017-01-09 | 2017-06-20 | 佳禾智能科技股份有限公司 | The signal strength test system and method for testing of a kind of radio communication product |
| CN107274648A (en) * | 2017-06-05 | 2017-10-20 | 东北师范大学 | A kind of telluric electromagnetic sounding data transfer and monitoring method based on technology of Internet of things |
| CN108873074A (en) * | 2018-04-18 | 2018-11-23 | 浙江大学 | A kind of three-dimensional high-density method of measuring resistivity and exploration system based on electrode random distribution |
| CN108873074B (en) * | 2018-04-18 | 2020-03-24 | 浙江大学 | Electrode random distribution type high-density resistivity measuring method and exploration system |
| CN112649878A (en) * | 2020-09-11 | 2021-04-13 | 中国地质调查局成都地质调查中心 | Magnetotelluric sounding-based field automatic observation recording method |
| WO2022095338A1 (en) * | 2020-11-06 | 2022-05-12 | 浙江大学 | Urban road administration and transportation power supply network-based random distributed resistivity sensing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102404764A (en) | Wireless network observation method and system for three-dimensional electromagnetic exploration | |
| CN206564328U (en) | Transient electromagnetic exploration integrated dual-mode antenna rod and measurement apparatus | |
| CN102230972A (en) | Working state wireless monitoring method for cableless digital storage seismograph | |
| CN105301663A (en) | Time-frequency electromagnetic exploration data air acquisition device and system | |
| CN102573049A (en) | Method and system for indoor positioning | |
| CN103533652B (en) | A kind of node positioning method of underwater sensor network | |
| CN106526329B (en) | It is a kind of measurement earth's surface to deep layer ground resistivity method and device | |
| CN102685677A (en) | Indoor positioning method and device | |
| CN110531422B (en) | Tensor artificial source electromagnetic signal data acquisition processing method and device | |
| CN109856675A (en) | Fine motion acquires equipment, wireless remote-measuring system and data quality monitoring method | |
| CN106802429A (en) | A kind of quasi real time untethered network seismic detector system based on super wideband wireless module | |
| CN104181579A (en) | Full-digital three-component VSP (vertical seismic profile) system and measuring method thereof | |
| CN203811511U (en) | Coal dust concentration detection system based on wireless sensor network | |
| CN103825787B (en) | Wired cascade type electromagnetic data acquisition system and measuring method thereof | |
| CN103543434A (en) | Indoor positioning system, indoor positioning cell phone and indoor positioning method | |
| CN104360402B (en) | Well-to-ground joint electrical-method testing method and system | |
| CN106646624A (en) | Asymmetric electrical method-based sounding method | |
| CN103945399A (en) | Cooperation deployment method of mixed sensing nodes under uncertain environment | |
| CN205139386U (en) | Time frequently aerial collection system of electromagnetic survey data and system | |
| CN110012422A (en) | A kind of wireless sensor network mobile base station barrier-avoiding method in complicated region | |
| CN208522756U (en) | Drilling measuring equipment, system | |
| CN103929810B (en) | DV Hop wireless sensor network node positioning methods based on wavelet neural | |
| Chen et al. | A novel multi-module separated linear UWSNs sensor node | |
| CN207096467U (en) | A kind of near Sea Bottom hydrate detection system | |
| CN202475760U (en) | Wireless sensor network positioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120404 |