CN107084731B - Method and device for optimizing vehicle-mounted positioning track - Google Patents
Method and device for optimizing vehicle-mounted positioning track Download PDFInfo
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- CN107084731B CN107084731B CN201610087284.1A CN201610087284A CN107084731B CN 107084731 B CN107084731 B CN 107084731B CN 201610087284 A CN201610087284 A CN 201610087284A CN 107084731 B CN107084731 B CN 107084731B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3407—Route searching; Route guidance specially adapted for specific applications
- G01C21/3415—Dynamic re-routing, e.g. recalculating the route when the user deviates from calculated route or after detecting real-time traffic data or accidents
Abstract
The embodiment of the invention provides a method for optimizing a vehicle-mounted positioning track, which comprises the following steps: caching positioning information at a first preset time interval; judging whether the vehicle enters the curve or not according to the curve judgment strategy; and when the vehicle enters the curve, sending the latest cached positioning information to a server, and sending the positioning information to the server at the first preset time interval. The embodiment of the invention also provides a device for optimizing the vehicle-mounted positioning track.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted positioning data services, in particular to a method and a device for optimizing a vehicle-mounted positioning track.
Background
The vehicle-mounted Positioning generally adopts a Global Positioning System (GPS) Positioning technology, and transmits Positioning data to a server through a wireless data network, such as a 2G, 3G or 4G data network, and the server forms a vehicle running track according to uploaded historical Positioning data.
Because the transmitted positioning call can generate data traffic cost, the positioning data is generally uploaded to a server when the vehicle turns around at equal time or at equal intervals and by detecting the direction angle in the prior art, so that the data traffic is saved.
However, in the prior art, the positioning track is deviated due to misjudgment of vehicle turning and loss of track points at the initial part of the curve caused by the error of the direction angle information.
Disclosure of Invention
In view of this, embodiments of the present invention are expected to provide a method and an apparatus for optimizing a vehicle-mounted positioning track, so as to dynamically send positioning data according to a vehicle running track, save data traffic and reduce traffic cost.
The technical scheme of the embodiment of the invention is realized as follows:
a method for optimizing an on-board positioning trajectory, the method comprising:
caching positioning information at a first preset time interval;
judging whether the vehicle enters the curve or not according to the curve judgment strategy;
and when the vehicle enters the curve, sending the latest cached positioning information to a server, and sending the positioning information to the server at the first preset time interval.
The method as described above, wherein said determining whether the vehicle enters the curve according to the curve determination strategy comprises:
receiving data information sent by a Global Positioning System (GPS), analyzing the data information, and recording a first direction angle difference value between direction angles of each adjacent first preset time interval in the data information;
receiving direction angle information sent by an electronic compass, analyzing the direction angle information, and recording a second direction angle difference value between direction angles of all adjacent first preset time intervals in the direction angle information;
calculating a first number of times that the first direction angle difference value is greater than a preset direction angle difference value threshold value, and calculating a second number of times that the second direction angle difference value is greater than the preset direction angle difference value threshold value;
and when the first frequency and the second frequency are both greater than a preset frequency threshold value, judging that the vehicle enters the curve.
The method as above, wherein after the buffering the positioning information at the first preset time interval, the method further comprises:
judging whether the speed in the positioning information is greater than a preset speed threshold value or not;
when the speed is greater than the preset speed threshold value, the positioning information is sent at a second preset time interval;
and when the speed is smaller than the preset speed threshold value, sending the positioning information at a third preset time interval.
The method as claimed above, wherein the second preset time interval is smaller than the third preset time interval.
The method as above, wherein before the buffering the positioning information at the first preset time interval, the method further comprises:
judging whether the vehicle is in a running state or not;
and when the vehicle is in a driving state, caching the positioning information at the first preset time interval.
An apparatus for optimizing an on-board position trajectory, the apparatus comprising:
the cache module is used for caching the positioning information at a first preset time interval;
the judging module is used for judging whether the vehicle enters the curve or not according to the curve judging strategy;
and the sending module is used for sending the latest cached positioning information to a server when the judging module judges that the vehicle enters the curve, and sending the positioning information to the server at the first preset time interval.
The apparatus as described above, wherein the determining module is specifically configured to:
receiving data information sent by a Global Positioning System (GPS), analyzing the data information, and recording a first direction angle difference value between direction angles of each adjacent first preset time interval in the data information; receiving direction angle information sent by an electronic compass, analyzing the direction angle information, and recording a second direction angle difference value between direction angles of all adjacent first preset time intervals in the direction angle information; calculating a first number of times that the first direction angle difference value is greater than a preset direction angle difference value threshold value, and calculating a second number of times that the second direction angle difference value is greater than the preset direction angle difference value threshold value; and when the first frequency and the second frequency are both greater than a preset frequency threshold value, judging that the vehicle enters the curve.
The apparatus as above, wherein the determining module is further configured to: judging whether the speed in the positioning information is greater than a preset speed threshold value or not;
the sending module is further configured to: when the speed is greater than the preset speed threshold value, the positioning information is sent at a second preset time interval; and when the speed is smaller than the preset speed threshold value, sending the positioning information at a third preset time interval.
The apparatus as above, wherein the second preset time interval is smaller than the third preset time interval.
The apparatus as above, wherein the determining module is further configured to: judging whether the vehicle is in a running state or not;
the cache module is further configured to: and when the judging module judges that the vehicle is in a running state, caching the positioning information at the first preset time interval.
According to the method and the device for optimizing the vehicle-mounted positioning track, provided by the embodiment of the invention, the positioning information is cached at a first preset time interval; judging whether the vehicle enters the curve or not according to the curve judgment strategy; and when the vehicle enters the curve, sending the latest cached positioning information to a server, and sending the positioning information to the server at the first preset time interval. Therefore, whether the vehicle enters a curve can be accurately judged, the positioning data can be dynamically sent according to the running track of the vehicle, the data flow is saved, and the flow cost is reduced.
Drawings
FIG. 1 is a flowchart of a method for optimizing a vehicle-mounted positioning track according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for determining whether a vehicle enters a curve in a method for optimizing a vehicle-mounted positioning track according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for optimizing a vehicle-mounted positioning track according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of the device for optimizing the vehicle-mounted positioning track according to the embodiment of the present invention.
Detailed Description
In each embodiment of the invention, through a curve judgment strategy, double judgment is carried out by adopting a GPS and an electronic compass, the vehicle enters the curve is accurately judged, and through caching of the positioning information, the positioning information cached last time can be sent after the vehicle is judged to enter the curve, so that the curve track is optimized, meanwhile, the positioning information can be dynamically sent according to the running speed of the vehicle, the sending frequency is increased when the running speed of the vehicle is high, and the sending frequency is reduced when the running speed of the vehicle is low, so that the data flow is saved while the positioning track is accurate.
Fig. 1 is a flowchart of a method for optimizing a vehicle-mounted positioning track according to an embodiment of the present invention. As shown in fig. 1, the method provided in this embodiment may be specifically executed by an apparatus for optimizing a vehicle-mounted positioning track, and the method may include:
In practical application, before this step, the vehicle-mounted positioning track optimizing device needs to first judge whether the vehicle is in a running state; when the vehicle is in a driving state, caching the positioning information at the first preset time interval; it is understood that if the vehicle is not in a running state, no operation need be performed.
Further, after the step, the optimized vehicle-mounted positioning track device can also judge whether the speed in the positioning information is greater than a preset speed threshold value; when the speed is greater than the preset speed threshold value, the positioning information is sent at a second preset time interval; when the speed is smaller than the preset speed threshold value, sending the positioning information at a third preset time interval; wherein the second preset time interval is smaller than the third preset time interval.
That is, when the vehicle running speed is greater than the preset speed threshold, it indicates that the vehicle running speed is high, at this time, the frequency for sending the positioning information may be increased, and when the vehicle running speed is less than the preset speed threshold, it indicates that the vehicle running speed is low, at this time, the frequency for sending the positioning information is decreased, thereby achieving the purpose of saving data traffic.
And 102, judging whether the vehicle enters the curve or not according to the curve judgment strategy.
As shown in fig. 2, in this step, it can be specifically determined whether the vehicle enters a curve or not by the following steps.
and 1024, judging that the vehicle enters a curve when the first frequency and the second frequency are both larger than a preset frequency threshold value.
Specifically, during actual application, the optimized vehicle-mounted positioning track device simultaneously receives data information sent by a GPS and direction angle information sent by an electronic compass; analyzing data information and recording direction angle difference values between m seconds every other first preset time interval, such as the direction angle of m seconds, namely the first direction angle difference value, and recording for n times; the direction angle information is analyzed and the direction angle every m seconds is recorded, and the direction angle difference between m seconds, that is, the second direction angle difference, is calculated and recorded n times.
Calculating the times q1 that the difference value of the n-th-order direction angle in the data information is larger than a preset direction angle difference threshold value k, and the times q2 that the difference value of the n-th-order direction angle in the direction angle information is larger than the preset direction angle difference threshold value k; and judging whether q1 and q2 are both greater than a preset frequency threshold p, if q1 and q2 are both greater than the preset frequency threshold p, judging that the vehicle enters the curve, and otherwise, judging that the vehicle does not enter the curve.
Therefore, in the embodiment, whether the vehicle enters a curve can be accurately judged through double judgment of the GPS and the electronic compass.
And 103, when the vehicle is judged to enter the curve, sending the latest cached positioning information to a server, and sending the positioning information to the server at the first preset time interval.
Specifically, when the vehicle is judged to enter the curve, the vehicle-mounted optimized positioning track device sends the cached positioning information before m seconds to the server, and sends the positioning information to the server at the first preset time interval, that is, after the vehicle is judged to enter the curve, the last cached positioning information is sent again, so that the curve track optimization is ensured.
As shown in fig. 3, a specific process of applying the method for optimizing the vehicle-mounted positioning track provided by the present embodiment is as follows.
Step 301: judging whether the vehicle is in a running state according to the vehicle-mounted sensor, and if the vehicle is in the running state, entering step 302; otherwise, entering step 309 and ending;
step 302: caching the positioning information once every m seconds; then step 303 is entered;
step 303: judging whether the vehicle speed exceeds a preset speed threshold or not according to speed information in the GPS positioning information; if the speed exceeds the preset speed threshold, the step 304 is entered; otherwise, go to step 305;
step 304: sending positioning information every n1 seconds; then step 306 is entered;
step 305: sending positioning information every n2 seconds; then step 306 is entered;
step 306: judging whether the vehicle enters the curve or not according to the curve judgment strategy; entering a curve, then entering step 307; otherwise, go to step 309;
step 307: compensating at the initial stage of the curve, and supplementing positioning data m seconds before (cached in step 302); then step 308 is entered;
step 308: sending positioning information every m seconds; then step 309 is entered;
step 309: and (6) ending.
The method for optimizing the vehicle-mounted positioning track can accurately judge whether the vehicle enters a curve or not, can dynamically send positioning data according to the running track of the vehicle, saves data flow and reduces flow cost.
Fig. 4 is a schematic structural diagram of the device for optimizing the vehicle-mounted positioning track according to the embodiment of the present invention. As shown in fig. 4, the apparatus provided in this embodiment may specifically include: a buffer module 41, a judgment module 42 and a sending module 43.
The caching module 41 is configured to cache the positioning information at a first preset time interval;
a judging module 42, configured to judge whether the vehicle enters a curve according to a curve judging policy;
a sending module 43, configured to send the latest cached positioning information to a server when the determining module 42 determines that the vehicle enters a curve, and send the positioning information to the server at the first preset time interval.
In practical applications, the determining module 42 is specifically configured to: receiving data information sent by a GPS, analyzing the data information, and recording a first direction angle difference value between direction angles of each adjacent first preset time interval in the data information; receiving direction angle information sent by an electronic compass, analyzing the direction angle information, and recording a second direction angle difference value between direction angles of all adjacent first preset time intervals in the direction angle information; calculating a first number of times that the first direction angle difference value is greater than a preset direction angle difference value threshold value, and calculating a second number of times that the second direction angle difference value is greater than the preset direction angle difference value threshold value; and when the first frequency and the second frequency are both greater than a preset frequency threshold value, judging that the vehicle enters the curve.
Further, the determining module 42 is further configured to: judging whether the speed in the positioning information is greater than a preset speed threshold value or not; the sending module 43 is further configured to: when the speed is greater than the preset speed threshold value, the positioning information is sent at a second preset time interval; and when the speed is smaller than the preset speed threshold value, sending the positioning information at a third preset time interval.
It should be noted that the second preset time interval is smaller than the third preset time interval.
Further, the determining module 42 is further configured to: judging whether the vehicle is in a running state or not; the cache module 41 is further configured to: and when the judging module judges that the vehicle is in a running state, caching the positioning information at the first preset time interval.
The device for optimizing the vehicle-mounted positioning track provided by the embodiment can be used for executing the technical scheme of the method embodiment, the implementation principle and the technical effect are similar, and the details are not repeated here.
In practical applications, the buffer module 41, the judgment module 42 and the sending module 43 can be implemented by a Central Processing Unit (CPU), a microprocessor unit (MPU), a Digital Signal Processor (DSP) or a Field Programmable Gate Array (FPGA) on the vehicle-mounted track optimization device.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. A method for optimizing a vehicle-mounted positioning track is characterized by comprising the following steps:
caching positioning information at a first preset time interval;
judging whether the vehicle enters the curve or not according to the curve judgment strategy; wherein, according to the curve judgment strategy, judging whether the vehicle enters the curve comprises the following steps:
receiving data information sent by a Global Positioning System (GPS), analyzing the data information, and recording a first direction angle difference value between direction angles of each adjacent first preset time interval in the data information;
receiving direction angle information sent by an electronic compass, analyzing the direction angle information, and recording a second direction angle difference value between direction angles of all adjacent first preset time intervals in the direction angle information;
calculating a first number of times that the first direction angle difference value is greater than a preset direction angle difference value threshold value, and calculating a second number of times that the second direction angle difference value is greater than the preset direction angle difference value threshold value;
when the first frequency and the second frequency are both greater than a preset frequency threshold value, judging that the vehicle enters a curve;
and when the vehicle enters the curve, sending the latest cached positioning information to a server, and sending the positioning information to the server at the first preset time interval.
2. The method of claim 1, wherein after buffering the positioning information at the first preset time interval, the method further comprises:
judging whether the speed in the positioning information is greater than a preset speed threshold value or not;
when the speed is greater than the preset speed threshold value, the positioning information is sent at a second preset time interval;
and when the speed is smaller than the preset speed threshold value, sending the positioning information at a third preset time interval.
3. The method according to claim 2, characterized in that said second preset time interval is smaller than said third preset time interval.
4. The method of claim 3, wherein before buffering the positioning information at the first preset time interval, the method further comprises:
judging whether the vehicle is in a running state or not;
and when the vehicle is in a driving state, caching the positioning information at the first preset time interval.
5. An apparatus for optimizing a vehicle-mounted positioning trajectory, the apparatus comprising:
the cache module is used for caching the positioning information at a first preset time interval;
the judging module is used for judging whether the vehicle enters the curve or not according to the curve judging strategy;
wherein, the judging module is specifically configured to:
receiving data information sent by a Global Positioning System (GPS), analyzing the data information, and recording a first direction angle difference value between direction angles of each adjacent first preset time interval in the data information; receiving direction angle information sent by an electronic compass, analyzing the direction angle information, and recording a second direction angle difference value between direction angles of all adjacent first preset time intervals in the direction angle information; calculating a first number of times that the first direction angle difference value is greater than a preset direction angle difference value threshold value, and calculating a second number of times that the second direction angle difference value is greater than the preset direction angle difference value threshold value; when the first frequency and the second frequency are both greater than a preset frequency threshold value, judging that the vehicle enters a curve;
and the sending module is used for sending the latest cached positioning information to a server when the judging module judges that the vehicle enters the curve, and sending the positioning information to the server at the first preset time interval.
6. The apparatus of claim 5, wherein the determining module is further configured to: judging whether the speed in the positioning information is greater than a preset speed threshold value or not;
the sending module is further configured to: when the speed is greater than the preset speed threshold value, the positioning information is sent at a second preset time interval; and when the speed is smaller than the preset speed threshold value, sending the positioning information at a third preset time interval.
7. The apparatus of claim 6, wherein the second predetermined time interval is less than the third predetermined time interval.
8. The apparatus of claim 7, wherein the determining module is further configured to: judging whether the vehicle is in a running state or not;
the cache module is further configured to: and when the judging module judges that the vehicle is in a running state, caching the positioning information at the first preset time interval.
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| CN107589436A (en) * | 2017-09-21 | 2018-01-16 | 深圳市中兴物联科技有限公司 | The compensation method of vehicle driving trace and device, computer-readable recording medium |
| CN109855619A (en) * | 2017-11-30 | 2019-06-07 | 基本立子(北京)科技发展有限公司 | A method of optimization vehicle driving trace upload information |
| CN109532652B (en) * | 2018-09-27 | 2020-12-01 | 江西云本数字科技有限公司 | Tail rear window display method and device based on LBS positioning display |
| CN110415525A (en) * | 2019-07-26 | 2019-11-05 | 新华三技术有限公司成都分公司 | A kind of peccancy detection method and device |
| CN113267196B (en) * | 2021-05-19 | 2022-04-08 | 中移智行网络科技有限公司 | Vehicle track correction method, terminal and computer-readable storage medium |
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| US5956250A (en) * | 1990-02-05 | 1999-09-21 | Caterpillar Inc. | Apparatus and method for autonomous vehicle navigation using absolute data |
| US8032276B2 (en) * | 2004-12-07 | 2011-10-04 | Geotab, Inc. | Apparatus and method for optimally recording geographical position data |
| KR20090001721A (en) * | 2007-05-14 | 2009-01-09 | 팅크웨어(주) | Method for correcting map matching and navigation system implementing the method |
| CN102110363B (en) * | 2011-03-30 | 2013-07-10 | 北京世纪高通科技有限公司 | Floating vehicle data processing method and device |
| JP6010364B2 (en) * | 2011-08-24 | 2016-10-19 | 株式会社デンソー | Running track storage device |
| CN102707300B (en) * | 2012-06-05 | 2014-10-15 | 大唐移动通信设备有限公司 | Method, device and system for optimizing GPS track |
| JP6326711B2 (en) * | 2012-08-07 | 2018-05-23 | セイコーエプソン株式会社 | System and moving recording control method |
| BR112015011290A2 (en) * | 2012-11-16 | 2017-07-11 | Gogoro Inc | apparatus, method and article for vehicle turn signaling |
| DE102012024980A1 (en) * | 2012-12-20 | 2013-07-11 | Daimler Ag | Method for determining reference curve slope and steering angle correction value of motor vehicle, involves calculating actual reference curve slope and modified actual reference curve slope, and determining steering angle correction value |
| CN103697897A (en) * | 2013-12-06 | 2014-04-02 | 成都亿盟恒信科技有限公司 | Inflection point compensation of vehicle track information |
| US10538250B2 (en) * | 2014-07-23 | 2020-01-21 | Here Global B.V. | Road geometry generation from sparse data |
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