CN102556072A - Method and system for searching and prewarning speed-measurement camera point - Google Patents
Method and system for searching and prewarning speed-measurement camera point Download PDFInfo
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- CN102556072A CN102556072A CN2011104581819A CN201110458181A CN102556072A CN 102556072 A CN102556072 A CN 102556072A CN 2011104581819 A CN2011104581819 A CN 2011104581819A CN 201110458181 A CN201110458181 A CN 201110458181A CN 102556072 A CN102556072 A CN 102556072A
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Abstract
The invention is applicable to the field of GPSs (global positioning systems), and provides a method for searching and prewarning a speed measurement camera point. The method comprises the following steps of: acquiring current longitude, current latitude and driving direction by a GPS module; searching a speed-measurement camera point in accordance with the prewarning condition from a speed-measurement camera point database according to the acquired longitude, latitude and driving direction; and sending out a prewarning prompt when the distance between a vehicle and the speed-measurement camera point reaches a preset distance. According to the method and system, in the speed-measurement camera point database, the speed-measurement camera point in accordance with the prewarning condition is searched according to the data provided by the GPS module, when the preset distance is reached, the prewarning prompt is sent out. Therefore, a user can be prompted in time, and the driving safety of the user is guaranteed.
Description
Technical field
The invention belongs to the GPS field, relate in particular to a kind of retrieval method for early warning and retrieval forewarn system of the camera point that tests the speed.
Background technology
The driving safety early warning generally need cooperate the camera point data bank that tests the speed (comprising the camera point that fixedly tests the speed, security information point) with navigationsystem.Orientate the user as through GPS early warning service timely is provided, let the user grasp Dangerous Area, keep the safety traffic speed of a motor vehicle, safe driving.And the camera point data bank that tests the speed has several 300,000 data (not containing the Hong Kong and Macao in the scope of China's Mainland), and the data of thousands of of per weeks are constantly being upgraded; Every data are all given detailed attribute, comprise longitude, latitude, direction, type, speed limit etc.
Existing civilian GPS field is bigger for the height above sea level error limit, so the camera point difficulty that tests the speed of test the speed camera point and ground road network on overhead in present road net, the grade separation goes out differentiation.
Summary of the invention
In order to address the above problem, the present invention implements the retrieval method for early warning that purpose is to provide a kind of camera point that tests the speed.
The embodiment of the invention is achieved in that a kind of retrieval method for early warning of the camera point that tests the speed, and said method comprising the steps of:
Obtain current warp, latitude and direction of traffic by the GPS module;
According to the current warp, latitude and the direction of traffic that obtain, in the camera point data bank that tests the speed, retrieve the camera point that tests the speed that meets early-warning conditions;
When car and the distance between the camera point of testing the speed that meets early-warning conditions reach preset distance, send early warning.
Further, said method also comprises step:
With the data in the camera point data bank that tests the speed through the compression algorithm boil down to camera point database file that tests the speed.
Further, current warp, latitude and direction of traffic that said basis is obtained, the step that in the camera point data bank that tests the speed, retrieves the camera point that tests the speed that meets early-warning conditions also comprises:
A, every separated t retrieve once from the camera point data bank that tests the speed second, retrieve in current longitude and latitude ± F km scope and the newspaper point of azimuth in working as forward angle ± J °;
B, according to the variation of direction of traffic and longitude and latitude, adjust the distance and the incongruent retrieval point in azimuth carries out dynamic filtration;
C, judge whether current location is more and more nearer with the position of playing the newspaper point, closely then continues following calculation, far then filters out;
D, when present speed is higher than 100km/h, speed limit is that the information point of making a dash across the red light of 60km/h is filtered;
E, basis fixedly test the speed camera point for preferential, and security information is auxilliary principle, and the camera point that fixedly tests the speed is set to preferential early warning point, and security information point is common early warning point, so that early warning afterwards,
Above-mentioned b, c, d step are selected wherein one or more as required, and during elected majority step, a plurality of steps are carried out perhaps a plurality of step executed in parallel in order,
Said t, F, J are provided with according to the precision needs.
Further, the mode of early warning comprises: be controlled on the GPS read-out and show, and/or, through loudspeaker output voice suggestion.
Further, the said camera point that tests the speed has comprised newspaper point coordinate, end point coordinate, type, direction and speed limit.
Another object of the present invention is to provide a kind of retrieval forewarn system of the camera point that tests the speed, said system comprises:
The GPS module is used to obtain current warp, latitude and direction of traffic;
Retrieval unit is used in the camera point data bank that tests the speed, retrieving the camera point that tests the speed that meets early-warning conditions according to the current warp, latitude and the direction of traffic that obtain;
Prewarning unit is used for when car and the distance between the camera point of testing the speed that meets early-warning conditions reach preset distance, then sending early warning.
Further, said system also comprises:
Compression unit is used for the data of the camera point data bank that tests the speed through the compression algorithm boil down to camera point database file that tests the speed.
Further, said retrieval unit also comprises:
Play newspaper point retrieval module, be used for every at a distance from t second from testing the speed the retrieval of camera point data bank once, retrieval current longitude and latitude ± F km scope in and the azimuth report point rising in forward angle ± J °, said t, F, J are provided with according to the precision needs;
The dynamic filtration module is used for the variation according to direction of traffic and longitude and latitude, adjusts the distance and the incongruent retrieval point in azimuth carries out dynamic filtration;
Judge filtering module, be used to judge whether current location is more and more nearer with the position of playing the newspaper point, closely then continues following calculation, far then filters out;
The filtering module that makes a dash across the red light, when being used for that present speed is higher than 100km/h, speed limit is that the information point of making a dash across the red light of 60km/h is filtered;
Preferential early warning is provided with module, and it is preferential being used for according to the camera point that fixedly tests the speed, and security information is auxilliary principle, and the camera point that fixedly tests the speed is set to preferential early warning point, and security information point is common early warning point, so that early warning module is afterwards come early warning,
The above-mentioned filtering module that makes a dash across the red light, dynamic filtration module, judge that filtering module selects wherein one or more as required, during elected majority module, a plurality of modules are carried out perhaps a plurality of module executed in parallel in order.
Further, the said camera point that tests the speed has comprised newspaper point coordinate, end point coordinate, type, direction and speed limit.
In an embodiment of the present invention, in the camera point data bank that tests the speed,, will meet the early-warning conditions camera point that tests the speed and retrieve out, when reaching preset distance, send early warning according to the data that the GPS module provides.Like this, in time remind for the user, to guarantee user's traffic safety.
Description of drawings
Fig. 1 is the flow process of the retrieval method for early warning of the camera point that tests the speed that provides of the embodiment of the invention;
Fig. 2 is the constructional drawing of the retrieval forewarn system of the camera point that tests the speed that provides of the embodiment of the invention.
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the flow process of the retrieval method for early warning of the camera point that tests the speed that the embodiment of the invention provides, and details are as follows:
In step S101, with the data in the camera point data bank that tests the speed through the compression algorithm boil down to camera point database file that tests the speed.After the compression, this camera point database file that tests the speed is about 5M BYTE.
In step S102, obtain current warp, latitude and direction of traffic by the GPS module.
In step S103,, in the camera point data bank that tests the speed, retrieve the camera point that tests the speed that meets early-warning conditions according to the current warp, latitude and the direction of traffic that obtain.As reference information, retrieve satisfactory newspaper point with this.
As embodiments of the invention; This step specifically comprises: a, every separated t retrieve once from the camera point data bank that tests the speed second; Retrieval is in current longitude and latitude ± F km scope and (said t, F, J are provided with according to the precision needs, and as one of them value, t can be 1 second at the newspaper point that rises in forward angle ± J ° at the azimuth; F is 2 kms, and J is 30 degree); B, according to the variation of direction of traffic and longitude and latitude, adjust the distance and the incongruent retrieval point in azimuth carries out dynamic filtration; C, judge whether current location is more and more nearer with the position of playing the newspaper point, closely then continues following calculation, far then filters out; D, when present speed is higher than 100km/h, speed limit is that the information point of making a dash across the red light of 60km/h is filtered; E, again according to the camera point that fixedly tests the speed for preferential, security information is to assist principle, the camera point that fixedly tests the speed is set to preferential early warning point, security information point is common early warning point, so that early warning module is afterwards come early warning.As fixedly electronic eyes and a security information point meet requirement, the then preferential early warning camera point that fixedly tests the speed to retrieve one simultaneously.
When reality was implemented, above-mentioned b, c, d step can be selected wherein one or more as required; During elected majority step, a plurality of steps can be carried out in order, also can a plurality of step executed in parallel.
In step S104, when car and the distance between the camera point of testing the speed that meets early-warning conditions reach preset distance, send early warning.This preset distance can be set as required, for example, can be 200 to 1200 meters.The mode of early warning comprises: is controlled on the GPS read-out and shows, and/or, through loudspeaker output voice suggestion.
In an embodiment of the present invention; On data memory format; The complete camera point that tests the speed has comprised information such as newspaper point coordinate, end point coordinate, type, direction, speed limit and has formed; End point is the actual position of this information point, and playing the newspaper point then is the point apart from the position of 200 to 1200 meters of end point, generally after GPS equipment arrives this position, promptly can send early warning.
Fig. 2 shows the structure of the retrieval forewarn system of the camera point that tests the speed that the embodiment of the invention provides, and this retrieval forewarn system can be for being built in software unit or hardware cell or the unit soft, that scleroma is closed in the GPS equipment.
Behind GPS equipment location, the GPS module is obtained current warp, latitude and direction of traffic (azimuth), as reference information, retrieves satisfactory newspaper point with this.
Retrieval unit retrieves the camera point that tests the speed that meets early-warning conditions according to the current warp, latitude and the direction of traffic that obtain in the camera point data bank that tests the speed.When car and the distance between the camera point of testing the speed that meets early-warning conditions reached preset distance, prewarning unit was then sent early warning.
As embodiments of the invention, this system also comprises compression unit, and said compression unit will test the speed data in the camera point data bank through the compression algorithm boil down to camera point database file that tests the speed.
As embodiments of the invention, the early warning mode of prewarning unit comprises: show being controlled on the GPS read-out, and/or, the output voice suggestion.
As embodiments of the invention; The process that this retrieval unit is retrieved specifically comprises: play the every separated t of newspaper point retrieval module and from the camera point data bank that tests the speed, retrieve once second; Retrieval is in current longitude and latitude ± F km scope and (said t, F, J are provided with according to the precision needs, and as one of them value, t can be 1 second at the newspaper point that rises in forward angle ± J ° at the azimuth; F is 2 kms, and J is 30 degree); The dynamic filtration module is according to the variation of direction of traffic and longitude and latitude, adjusts the distance and the incongruent retrieval point in azimuth carries out dynamic filtration; Judge that filtering module judges whether current location is more and more nearer with the position of playing the newspaper point, closely then continues following calculation, far then filters out; When the filtering module that makes a dash across the red light was higher than 100km/h with present speed, speed limit was that the information point of making a dash across the red light of 60km/h is filtered; It is preferential according to the camera point that fixedly tests the speed again that preferential early warning is provided with module, and security information is auxilliary principle, and the camera point that fixedly tests the speed is set to preferential early warning point, and security information point is common early warning point, so that early warning module is afterwards come early warning.As fixedly electronic eyes and a security information point meet requirement, the then preferential early warning camera point that fixedly tests the speed to retrieve one simultaneously.When reality is implemented, the above-mentioned filtering module that makes a dash across the red light, dynamic filtration module, judge that filtering module can select wherein one or more as required; During elected majority module, a plurality of modules can be carried out in order, also can three a plurality of executed in parallel in the module.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the retrieval method for early warning of the camera point that tests the speed is characterized in that, said method comprising the steps of:
Obtain current warp, latitude and direction of traffic by the GPS module;
According to the current warp, latitude and the direction of traffic that obtain, in the camera point data bank that tests the speed, retrieve the camera point that tests the speed that meets early-warning conditions;
When car and the distance between the camera point of testing the speed that meets early-warning conditions reach preset distance, send early warning.
2. the retrieval method for early warning of the camera point that tests the speed according to claim 1 is characterized in that, said method also comprises step:
With the data in the camera point data bank that tests the speed through the compression algorithm boil down to camera point database file that tests the speed.
3. the retrieval method for early warning of the camera point that tests the speed according to claim 1; It is characterized in that; Current warp, latitude and direction of traffic that said basis is obtained, the step that in the camera point data bank that tests the speed, retrieves the camera point that tests the speed that meets early-warning conditions also comprises:
A, every separated t retrieve once from the camera point data bank that tests the speed second, retrieve in current longitude and latitude ± F km scope and the newspaper point of azimuth in working as forward angle ± J °;
B, according to the variation of direction of traffic and longitude and latitude, adjust the distance and the incongruent retrieval point in azimuth carries out dynamic filtration;
C, judge whether current location is more and more nearer with the position of playing the newspaper point, closely then continues following calculation, far then filters out;
D, when present speed is higher than 100km/h, speed limit is that the information point of making a dash across the red light of 60km/h is filtered;
E, basis fixedly test the speed camera point for preferential, and security information is auxilliary principle, and the camera point that fixedly tests the speed is set to preferential early warning point, and security information point is common early warning point, so that early warning afterwards,
Above-mentioned b, c, d step are selected wherein one or more as required, and during elected majority step, a plurality of steps are carried out perhaps a plurality of step executed in parallel in order,
Said t, F, J are provided with according to the precision needs.
4. the retrieval method for early warning of the camera point that tests the speed according to claim 1 is characterized in that, the mode of early warning comprises: be controlled on the GPS read-out and show, and/or, through loudspeaker output voice suggestion.
5. the retrieval method for early warning of the camera point that tests the speed according to claim 1 is characterized in that, the said camera point that tests the speed has comprised newspaper point coordinate, end point coordinate, type, direction and speed limit.
6. the retrieval forewarn system of the camera point that tests the speed is characterized in that, said system comprises:
The GPS module is used to obtain current warp, latitude and direction of traffic;
Retrieval unit is used in the camera point data bank that tests the speed, retrieving the camera point that tests the speed that meets early-warning conditions according to the current warp, latitude and the direction of traffic that obtain;
Prewarning unit is used for when car and the distance between the camera point of testing the speed that meets early-warning conditions reach preset distance, then sending early warning.
7. the retrieval forewarn system of the camera point that tests the speed according to claim 6 is characterized in that, said system also comprises:
Compression unit is used for the data of the camera point data bank that tests the speed through the compression algorithm boil down to camera point database file that tests the speed.
8. the retrieval forewarn system of the camera point that tests the speed according to claim 6 is characterized in that, said retrieval unit also comprises:
Play newspaper point retrieval module, be used for every at a distance from t second from testing the speed the retrieval of camera point data bank once, retrieval current longitude and latitude ± F km scope in and the azimuth report point rising in forward angle ± J °, said t, F, J are provided with according to the precision needs;
The dynamic filtration module is used for the variation according to direction of traffic and longitude and latitude, adjusts the distance and the incongruent retrieval point in azimuth carries out dynamic filtration;
Judge filtering module, be used to judge whether current location is more and more nearer with the position of playing the newspaper point, closely then continues following calculation, far then filters out;
The filtering module that makes a dash across the red light, when being used for that present speed is higher than 100km/h, speed limit is that the information point of making a dash across the red light of 60km/h is filtered;
Preferential early warning is provided with module, and it is preferential being used for according to the camera point that fixedly tests the speed, and security information is auxilliary principle, and the camera point that fixedly tests the speed is set to preferential early warning point, and security information point is common early warning point, so that early warning module is afterwards come early warning,
The above-mentioned filtering module that makes a dash across the red light, dynamic filtration module, judge that filtering module selects wherein one or more as required, during elected majority module, a plurality of modules are carried out perhaps a plurality of module executed in parallel in order.
9. the retrieval forewarn system of the camera point that tests the speed according to claim 6 is characterized in that, the said camera point that tests the speed has comprised newspaper point coordinate, end point coordinate, type, direction and speed limit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104581819A CN102556072A (en) | 2011-12-31 | 2011-12-31 | Method and system for searching and prewarning speed-measurement camera point |
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| CN2011104581819A CN102556072A (en) | 2011-12-31 | 2011-12-31 | Method and system for searching and prewarning speed-measurement camera point |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104155469A (en) * | 2014-08-12 | 2014-11-19 | 深圳市凯立德欣软件技术有限公司 | Interval velocity measurement prompting method and electronic device |
| CN105280001A (en) * | 2014-07-23 | 2016-01-27 | 中兴通讯股份有限公司 | Mobile communication terminal and traffic monitoring equipment detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105280001A (en) * | 2014-07-23 | 2016-01-27 | 中兴通讯股份有限公司 | Mobile communication terminal and traffic monitoring equipment detection method |
| CN104155469A (en) * | 2014-08-12 | 2014-11-19 | 深圳市凯立德欣软件技术有限公司 | Interval velocity measurement prompting method and electronic device |
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Application publication date: 20120711 |