CN105243847A - Elevated road traffic detector laying technology and traffic volume estimation method using the same - Google Patents
Elevated road traffic detector laying technology and traffic volume estimation method using the same Download PDFInfo
- Publication number
- CN105243847A CN105243847A CN201510725734.0A CN201510725734A CN105243847A CN 105243847 A CN105243847 A CN 105243847A CN 201510725734 A CN201510725734 A CN 201510725734A CN 105243847 A CN105243847 A CN 105243847A
- Authority
- CN
- China
- Prior art keywords
- traffic
- section
- traffic detector
- ring road
- main line
- 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.)
- Granted
Links
Landscapes
- Traffic Control Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention, which belongs to the elevated road traffic field, particularly relates to an elevated road traffic detector laying technology and a traffic volume estimation method using the same. The method comprises the following steps that: road sections of an elevated road are classified and traffic detectors are arranged; relative positions of traffic detectors that are arranged at an entrance ramp road section and a closest elevated main road section are set reasonably and the following formula is met: a=b.(Vb-Va)/Vb. After an interval is determined, needed time t from a traffic detector at an elevated main road section closest to a ramp entrance to a detection section n by a vehicle is obtained; time Tn driving to the detection section n by the vehicle is obtained; and then a traffic volume at the detection section n at the time Tn is obtained. According to the invention, relative positions of the specific traffic detectors are set reasonably at the current frame of the exiting elevated road traffic detection laying technology, thereby meeting a rapid traffic volume estimation requirement of a non-traffic-detector road section at an elevated road. The on-line rapid estimation effect is extremely high; and the detection precision also can be guaranteed effectively.
Description
Technical field
The invention belongs to overpass field of traffic, be specifically related to a kind of overpass traffic detector laying technology and volume of traffic evaluation method thereof.
Background technology
The volume of traffic, refers within the unit interval, by the quantity of the participant of a certain place on road or a certain detection section actual participation traffic.The volume of traffic is the measurement index of road cross section actual capacity, is also roads classification and the Main Basis determining category of roads.The volume of traffic possesses spatial and temporal distributions characteristic, is therefore a random number, also namely its data in time with space and changing.At present for the online measuring and calculating of the volume of traffic especially overpass volume of traffic, be all the mode by setting up traffic detector, to reach the Online statistics object of this volume of traffic.On the one hand, the layout density of traffic detector is more intensive, and detected data more can reflect road traffic flow operation characteristic exactly.Under the idealized situation of people, should intensively be disposed to without space state between each adjacent traffic detecting device, so that the online calculation of measured data of overpass arbitrary section part volume of traffic can be obtained at any time fast.But then, realistic situation is but no matter be consider from cost-effectivenes or feasibility, each traffic detector on same overhead section arranges that number all exists the upper limit, also all certainly exist installation interval between adjacent traffic detecting device simultaneously, also namely there is detection blind area between two adjacent traffic detecting devices.Still can realize volume of traffic Online statistics object fast in each traffic detector institute search coverage, but the volume of traffic measuring and calculating in above-mentioned detection blind area then becomes a difficult problem.How can provide a kind of simple operation and practical, and the overpass traffic detector laying technology be applicable in current techniques framework, can on the basis being subject to traffic detector placement technique and cost constraint at present, still can realize the rapid transit amount estimation demand without all standing in traffic detector section on overpass, be the technical barrier that those skilled in the art are urgently to be resolved hurrily.
Summary of the invention
Object of the present invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of overpass traffic detector laying technology based on volume of traffic estimation of efficient quick is provided, it can in the framework of current overpass traffic detector placement technique, reasonably distributed by optimization special traffic detecting device relative position, thus the rapid transit amount estimation demand realized without traffic detector section on overpass, it possesses high estimates effect fast online, and accuracy of detection also can effectively be ensured simultaneously.Another object of the present invention is to provide the volume of traffic evaluation method based on above-mentioned laying technology, with under no matter whether having traffic detector situation, equal can realization estimates requirement fast at end to the volume of traffic of arbitrary detection tomography in one section of overhead main line section between ramp exit initiating terminal of ring road entrance, and this is obviously of great significance for the traffic circulation state tool analyzing overpass
For achieving the above object, present invention employs following technical scheme:
A kind of overpass traffic detector lays technology, it is characterized in that comprising the following steps:
1), to the section on overpass classify, be divided into Entrance ramp section, overhead main line section and exit ramp section;
2), traffic detector is arranged on Entrance ramp section, overhead main line section and exit ramp section; Wherein, with the road surface bearing of trend of overpass for X-axis, with direction, vertical overpass road surface for Y-axis sets up coordinate system, and obtain the ring road entry position in Entrance ramp section, make to meet following formula closest to overhead main line section place's traffic detector of ring road entrance and the spacing of traffic detector in X-axis of ring road porch:
a＝b·(V
b-V
a)/V
b
In formula, a is the spacing of traffic detector in X-axis of overhead main line section place's traffic detector closest to ring road entrance and ring road porch, unit m;
B is the X-axis spacing of overhead main line section place's traffic detector closest to ring road entrance and ring road entrance, unit m;
V
afor the vehicle average speed that the traffic detector of ring road porch detects, unit km/h;
V
bfor the vehicle average speed detected closest to the overhead main line section place traffic detector of ring road entrance, unit km/h.
Described traffic detector comprises microwave radar detection device and bayonet socket; Described microwave radar detection device is laid in overhead main line section place, and bayonet socket is at least laid in Entrance ramp section place.
The laying spacing of overhead main line section place microwave radar detection device is less than or equal to 800m.
A kind of volume of traffic evaluation method being applied to above-mentioned laying technology, step 2) in, determining closest to overhead main line section place's traffic detector of ring road entrance and the traffic detector of ring road porch after the spacing in X-axis, one section between adjacent Entrance ramp section and exit ramp section overhead main line section place arranges arbitrary detection section n, and now vehicle by the overhead main line section traffic detector closest to ring road entrance to detecting section n required time t is:
t＝L/V
b
In formula,
L detects section n and the overhead main line section place traffic detector distance closest to ring road entrance;
V
bfor the vehicle average speed detected closest to the overhead main line section place traffic detector of ring road entrance, unit km/h;
Now, through step 2) layout, T
0moment passes through closest to the vehicle of overhead main line section place traffic detector of ring road entrance and the vehicle through ring road porch traffic detector, will at T
nmoment arrives simultaneously detects section n; Obtain vehicle according to following formula and drive to the moment T detecting section n
n:
T
n＝T
0+t
In formula,
T is that vehicle extremely detects section n required time by the overhead main line section traffic detector closest to ring road entrance, unit s;
According to T
0moment is closest to the volume of traffic S of the overhead main line section place traffic detector of ring road entrance
1with the volume of traffic S through ring road porch traffic detector
2, can T be drawn
nthe volume of traffic S at moment detection section n place
n:
S
n＝S
1+S
2。
Beneficial effect of the present invention is:
1), the present invention can reasonably set ring road porch bayonet socket and near this bayonet socket microwave radar detection device between X-axis optimization distance, thus by above-mentioned bayonet socket and microwave radar detection device place's volume of traffic and corresponding vehicle travel speed, parameter based on the time, the magnitude of traffic flow at subsequent section place can be extrapolated.More specifically, obtained by above-mentioned formula corresponding traffic detector X-axis distance and after installing on the spot according to this distance; Waiting in the same time, vehicle with the bayonet socket of normal ascending speed through ring road porch to time of next microwave radar detection device, just equal vehicle with normal travel speed by a upper microwave radar detection device to time of this microwave radar detection device.At this moment, because the volume of traffic through each traffic detector is necessarily known and after measured.Now, at the end of ring road entrance to the one section of overhead main line section place between ramp exit initiating terminal, in any case the division carrying out detecting tomography is to trying to achieve the volume of traffic of this tomography, all by T
0obtain vehicle with the simple superposition of t and drive to the moment T detecting section n
n, and can according to T
0moment, through the volume of traffic sum at a upper microwave radar detection device and the bayonet socket place through ring road porch, estimates to obtain the volume of traffic at this detection tomography place extremely easily.
Pass through such scheme, present invention, avoiding the generation that Traffic volume detecting situation normally cannot be carried out in Traffic volume detecting blind area that traditional traffic detector causes because there is arrangement interval, achieving the corresponding quick estimation on line requirement without arbitrary detection tomography place of traffic detector section place volume of traffic.This method breaches the chains that traditional volume of traffic electronics that corresponding traffic detector must be relied on to carry out respective stretch detection tomography calculates, at any time, all can according to the close microwave radar detection device data of ring road entrance and the bayonet socket data of ring road porch, with simple additional calculation, next directly " forwards " goes out the volume of traffic on the corresponding overhead main line section detection section in downstream, its account form is simple and convenient, range of application is very extensive, and is obviously of great significance for the traffic circulation state tool analyzing overpass.
Accompanying drawing explanation
Fig. 1 is each traffic detector arrangenent diagram of the present invention.
In accompanying drawing each label and each component names corresponding relation of the present invention as follows:
10-microwave radar detection device 20-bayonet socket
Embodiment
For ease of understanding, composition graphs 1 pair of specific embodiment of the invention structure and workflow do following description herein:
1) position, residing for section each on overpass, is divided into Entrance ramp section, overhead main line section and exit ramp section by overpass.
2) traffic detector, on overpass comprises microwave radar detection device 10 and bayonet socket 20.Microwave radar detection device 10 is mainly laid on overpass main line section, and bayonet socket 20 is mainly laid on overpass Entrance ramp section.
3), consider the impact of traffic detector layout density on the magnitude of traffic flow, travel time estimation precision, the traffic detector in overpass main line section is laid spacing and should be less than or equal to 800m.In order to realize the spatio-temporal synergy coupling of the magnitude of traffic flow, being convenient to later stage fused data, setting up an office the spacing demand fulfillment following formula of position in X-axis near set up an office position and ring road entrance section place bayonet socket cloth of the microwave radar cloth of ring road entrance:
a＝b·(V
b-V
a)/V
b
In formula, a is microwave radar detection device and bayonet socket point position X-axis spacing, unit m; B is microwave radar detection device and interwoven region starting point (being also ring road entrance) X-axis spacing, unit m; V
afor the vehicle average speed that bayonet socket detects, unit km/h; V
bfor the vehicle average speed that microwave radar detection device detects, unit km/h.Wherein, V
a, V
bdetect data according to the history in a period of time to determine, even obtain correlation parameter by arranging speed of vehicle detector etc. temporarily, use for this place, just repeat no more herein.
When specifically carrying out road Traffic Volume estimation, the present embodiment chooses one section of overpass, and completes the laying of traffic detector according to mode shown in Fig. 1:
The distance detecting section n and upstream microwave radar detection device in Fig. 1 is L, and vehicle drives to detection section n required time t from upstream microwave radar detection device and is:
t＝L/V
b
In formula, V
bfor the vehicle average speed that microwave radar detection device detects, unit km/h.
After traffic detector is laid according to above-mentioned traffic detector distribution method, T
0moment, will at T through the vehicle of upstream microwave radar detection device and the vehicle through bayonet socket
nmoment arrives simultaneously detects section n.Obtain vehicle according to following formula and drive to the moment T detecting section n
n:
T
n＝T
0+t
According to T
0the volume of traffic of moment upstream microwave radar detection device and bayonet socket volume of traffic sum, directly can draw T
nthe volume of traffic at moment detection section n place.
Calculated by mass data, the error obtained between volume of traffic estimated value and magnitude of traffic flow detected value all remains within 10%; Show that the traffic detector distribution method in the present invention can realize Traffic flow estimation comparatively accurately, meet adopt requirement at present in the industry for road Traffic Volume parameter completely.Accordingly, the detection section of traffic detector is not installed, such as, detection section n-1 place in Fig. 1, due to interval arrangement method unique between bayonet socket corresponding in the present invention and microwave radar detection device, T
0the vehicle of moment through upstream microwave radar detection device and the vehicle through bayonet socket will at T
n-1moment arrives simultaneously detects section n-1, and its volume of traffic in like manner can be estimated by above-mentioned steps too and draws.
Embodiment 1:
In the present embodiment, the traffic detector in overpass main line section is laid spacing and is got 800m, and the distance therefore detecting section n and upstream microwave radar detection device in Fig. 1 is 800m.Upstream microwave radar detection device and interwoven region starting point (being also ring road entrance) X-axis spacing b are set to 200m.Detect data according to the history in a period of time and obtain microwave radar detection device place, upstream vehicle average speed V
b=72km/h, ring road porch vehicle average speed V
a=38km/h.By a=b (V
b-V
a)/V
bupstream microwave radar detection device and the spacing a=94m of bayonet socket in X-axis can be determined.By t=L/V
bcan determine that vehicle drives to detection section n required time t from upstream microwave radar detection device is 40s.
T
0moment, will at T through the vehicle of upstream microwave radar detection device and the vehicle through bayonet socket
nmoment (T
n=T
0+ 40s) arrive simultaneously and detect section n.The measurement period of traffic detector is 5min.T
0in the moment, the vehicle number that acquisition upstream microwave radar detection device detects in a measurement period is 343, and the vehicle number that bayonet socket detects in a measurement period is 98.Therefore, T
nit is above-mentioned two place's volume of traffic sums that moment detects the section n volume of traffic estimated value be in a measurement period, namely 441.And T
nthe vehicle number that moment detection section n place microwave radar detection device detects in a measurement period is 426.Volume of traffic evaluated error is 3.5%.
Embodiment 2:
The present embodiment adopts the traffic detector in embodiment 1 to lay mode, carries out volume of traffic estimation to the detection section not installing traffic detector.The distance detecting section n-1 and upstream microwave radar detection device in Fig. 1 is 500m.By t=L/V
bcan determine that vehicle drives to detection section n-1 required time t from upstream microwave radar detection device is 25s.
T
0moment, will at T through the vehicle of upstream microwave radar detection device and the vehicle through bayonet socket
n-1moment (T
n-1=T
0+ 25s) arrive simultaneously and detect section n-1.The measurement period of traffic detector is 5min.T
0in the moment, the vehicle number that upstream microwave radar detection device detects in a measurement period is 343, and the vehicle number that bayonet socket detects in a measurement period is 98.Therefore, T
n-1it is above-mentioned two place's volume of traffic sums that moment detects the section n-1 volume of traffic estimated value be in a measurement period, namely 441.
Claims (4)
1. overpass traffic detector lays a technology, it is characterized in that comprising the following steps:
1), to the section on overpass classify, be divided into Entrance ramp section, overhead main line section and exit ramp section;
2), traffic detector is arranged on Entrance ramp section, overhead main line section and exit ramp section; Wherein, with the road surface bearing of trend of overpass for X-axis, with direction, vertical overpass road surface for Y-axis sets up coordinate system, and obtain the ring road entry position in Entrance ramp section, make to meet following formula closest to overhead main line section place's traffic detector of ring road entrance and the spacing of traffic detector in X-axis of ring road porch:
a＝b·(V
b-V
a)/V
b
In formula, a is the spacing of traffic detector in X-axis of overhead main line section place's traffic detector closest to ring road entrance and ring road porch, unit m;
B is the X-axis spacing of overhead main line section place's traffic detector closest to ring road entrance and ring road entrance, unit m;
V
afor the vehicle average speed that the traffic detector of ring road porch detects, unit km/h;
V
bfor the vehicle average speed detected closest to the overhead main line section place traffic detector of ring road entrance, unit km/h.
2. a kind of overpass traffic detector according to claim 1 lays technology, it is characterized in that: described traffic detector comprises microwave radar detection device and bayonet socket; Described microwave radar detection device is laid in overhead main line section place, and bayonet socket is at least laid in Entrance ramp section place.
3. a kind of overpass traffic detector according to claim 2 lays technology, it is characterized in that: the laying spacing of overhead main line section place microwave radar detection device is less than or equal to 800m.
4. apply the volume of traffic evaluation method laying technology as described in the claims 1 or 2 or 3 for one kind, it is characterized in that: step 2) in, determining closest to overhead main line section place's traffic detector of ring road entrance and the traffic detector of ring road porch after the spacing in X-axis, one section between adjacent Entrance ramp section and exit ramp section overhead main line section place arranges arbitrary detection section n, and now vehicle by the overhead main line section traffic detector closest to ring road entrance to detecting section n required time t is:
t＝L/V
b
In formula,
L detects section n and the overhead main line section place traffic detector distance closest to ring road entrance;
V
bfor the vehicle average speed detected closest to the overhead main line section place traffic detector of ring road entrance, unit km/h;
Now, through step 2) layout, T
0moment passes through closest to the vehicle of overhead main line section place traffic detector of ring road entrance and the vehicle through ring road porch traffic detector, will at T
nmoment arrives simultaneously detects section n; Obtain vehicle according to following formula and drive to the moment T detecting section n
n:
T
n＝T
0+t
In formula,
T is that vehicle extremely detects section n required time by the overhead main line section traffic detector closest to ring road entrance, unit s;
According to T
0moment is closest to the volume of traffic S of the overhead main line section place traffic detector of ring road entrance
1with the volume of traffic S through ring road porch traffic detector
2, can T be drawn
nthe volume of traffic S at moment detection section n place
n:
S
n＝S
1+S
2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725734.0A CN105243847B (en) | 2015-10-28 | 2015-10-28 | A kind of overpass traffic detector distribution method and its volume of traffic evaluation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725734.0A CN105243847B (en) | 2015-10-28 | 2015-10-28 | A kind of overpass traffic detector distribution method and its volume of traffic evaluation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105243847A true CN105243847A (en) | 2016-01-13 |
| CN105243847B CN105243847B (en) | 2017-06-20 |
Family
ID=55041473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510725734.0A Active CN105243847B (en) | 2015-10-28 | 2015-10-28 | A kind of overpass traffic detector distribution method and its volume of traffic evaluation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105243847B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297293A (en) * | 2016-08-30 | 2017-01-04 | 银江股份有限公司 | A kind of overhead piecewise interval real-time speed self-adaptive computing method based on the big data of bayonet socket |
| CN108564789A (en) * | 2018-06-11 | 2018-09-21 | 重庆大学 | Expressway ramp up-downlink direction flow estimation method based on charge station's data |
| WO2018205067A1 (en) * | 2017-05-08 | 2018-11-15 | 深圳市卓希科技有限公司 | Method and system for detecting volume of traffic |
| CN109767028A (en) * | 2018-12-07 | 2019-05-17 | 东南大学 | Recognition methods, Traffic volume forecasting method and the system of road virtual blind area monitoring point |
| CN112017432A (en) * | 2020-08-05 | 2020-12-01 | 中交第一公路勘察设计研究院有限公司 | Method for laying expressway traffic running state perception radar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5798949A (en) * | 1995-01-13 | 1998-08-25 | Kaub; Alan Richard | Traffic safety prediction model |
| CN101789183A (en) * | 2010-02-10 | 2010-07-28 | 北方工业大学 | Self-adaptive control system and method for entrance ramp |
| CN102542787A (en) * | 2010-12-30 | 2012-07-04 | 同济大学 | Flexible control system and method for urban expressway entrance ramp |
| CN103236191A (en) * | 2013-03-26 | 2013-08-07 | 中国公路工程咨询集团有限公司 | Video-based safety precaution method for vehicle merging from highway ramp |
-
2015
- 2015-10-28 CN CN201510725734.0A patent/CN105243847B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5798949A (en) * | 1995-01-13 | 1998-08-25 | Kaub; Alan Richard | Traffic safety prediction model |
| CN101789183A (en) * | 2010-02-10 | 2010-07-28 | 北方工业大学 | Self-adaptive control system and method for entrance ramp |
| CN102542787A (en) * | 2010-12-30 | 2012-07-04 | 同济大学 | Flexible control system and method for urban expressway entrance ramp |
| CN103236191A (en) * | 2013-03-26 | 2013-08-07 | 中国公路工程咨询集团有限公司 | Video-based safety precaution method for vehicle merging from highway ramp |
Non-Patent Citations (2)
| Title |
|---|
| 方青: "基于神经网络算法的高速公路基本路段线圈检测器布设间距研究", 《道路交通与安全》 * |
| 黄中祥等: "面向需求的高速公路网检测器布置方法", 《系统工程》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297293A (en) * | 2016-08-30 | 2017-01-04 | 银江股份有限公司 | A kind of overhead piecewise interval real-time speed self-adaptive computing method based on the big data of bayonet socket |
| CN106297293B (en) * | 2016-08-30 | 2019-01-11 | 银江股份有限公司 | A kind of overhead piecewise interval real-time speed self-adaptive computing method based on bayonet big data |
| WO2018205067A1 (en) * | 2017-05-08 | 2018-11-15 | 深圳市卓希科技有限公司 | Method and system for detecting volume of traffic |
| CN108564789A (en) * | 2018-06-11 | 2018-09-21 | 重庆大学 | Expressway ramp up-downlink direction flow estimation method based on charge station's data |
| CN109767028A (en) * | 2018-12-07 | 2019-05-17 | 东南大学 | Recognition methods, Traffic volume forecasting method and the system of road virtual blind area monitoring point |
| CN112017432A (en) * | 2020-08-05 | 2020-12-01 | 中交第一公路勘察设计研究院有限公司 | Method for laying expressway traffic running state perception radar |
| CN112017432B (en) * | 2020-08-05 | 2022-07-15 | 中交第一公路勘察设计研究院有限公司 | Method for laying expressway traffic running state perception radar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105243847B (en) | 2017-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105243847A (en) | Elevated road traffic detector laying technology and traffic volume estimation method using the same | |
| CN103456172B (en) | A kind of traffic parameter measuring method based on video | |
| CN109167956A (en) | The full-bridge face traveling load spatial distribution merged based on dynamic weighing and more video informations monitors system | |
| Esawey | Estimation of annual average daily bicycle traffic with adjustment factors | |
| CN105182184B (en) | A kind of distribution cable mixing direct distribution lines fault distance-finding method decomposed based on direction traveling wave along the line | |
| CN104050806B (en) | Method for detecting traffic infractions in a traffic light zone through rear end measurement by a radar device | |
| CN103985251B (en) | A kind of method and system of vehicle queue length measuring and calculating | |
| CN104281738B (en) | The assessment system and method for the Arterial Coordination Control scheme of arterial road | |
| CN105654720B (en) | Loop detector layout method based on urban road congestion identification | |
| CN104933871B (en) | Method and system for detecting traffic vehicles | |
| CN103383428B (en) | A kind of pole line cable hybrid line both-end Method of Traveling Wave Fault Ranging | |
| CN103913600A (en) | Device and method for detecting speed measurement errors of speedometer of motor vehicle | |
| CN201142094Y (en) | Simple traffic monitoring device | |
| CN106097734A (en) | A kind of plane perception detection method controlled for crossing traffic signal and system | |
| US20180172718A1 (en) | Optical standoff sensor | |
| US8527222B1 (en) | Method and apparatus for determining installation locations of a plurality of fault indicators in a power network | |
| CN105806227A (en) | Light curtain type automobile overall size detection device | |
| CN113935158A (en) | Traffic detector optimized layout method for multiple points of highway accidents | |
| KR20100130055A (en) | Detecting methode for vehicle density | |
| KR20110115707A (en) | The return current ratio measurement system for real time leakage current monitoring on the dc railway system | |
| US20210171320A1 (en) | Escalator-monitoring/operable device and methods of use thereof | |
| CN103606280B (en) | A kind of information identifying method, device and system | |
| CN105354173B (en) | A kind of average wind spatial non-uniformity probability acquisition method | |
| TWI606429B (en) | Instantaneous station order searching and filtering method for multiple stations | |
| CN104597513A (en) | Method for obtaining big data preprocessing value of geophysical field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |