CN101634560B - Running position identifying system and method - Google Patents
Running position identifying system and method Download PDFInfo
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- CN101634560B CN101634560B CN2008100296787A CN200810029678A CN101634560B CN 101634560 B CN101634560 B CN 101634560B CN 2008100296787 A CN2008100296787 A CN 2008100296787A CN 200810029678 A CN200810029678 A CN 200810029678A CN 101634560 B CN101634560 B CN 101634560B
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Abstract
The invention provides a running position identifying system and a running position identifying method, which are applied to an electronic device for receiving a navigation signal which is transmitted by a Global Position System (GPS). Navigation software is installed in the electronic device; and the running position identifying method comprises the following steps: setting a threshold value of a carrier-to-noise ratio of the navigation signal received by the electronic device, and storing the threshold value; sensing the carrier-to-noise ratio of the navigation signal; and detecting that whether a barrier exists in a preset detecting range above the electronic device when the sensed carrier-to-noise ratio is less than the set threshold value so as to ensure that the navigation software prompts the running position when the barrier exists; therefore, the defect that the running position cannot be identified accurately in the prior navigation software technology is overcome.
Description
[technical field]
The present invention is relevant for a kind of running position identifying system and method, and particularly a kind of carrier-to-noise ratio with navigation signal is as the running position identifying system and the method for navigation height basis for estimation.
[background technology]
The vehicle road navigator mostly has road positioning function and road guide function at present.The road positioning function is to utilize Global Positioning System (GPS) (Global Positioning System; GPS) add that inertial navigation unit (position detecting device and speed detecting device) calculates vehicle position coordinate in real time; And with the comparison of the road data in this position coordinates and the stored transportation database, and then calculate present road that goes of vehicle and physical location; The road guide function is to supply the user to set a departure place and a destination, then utilizes best routing algorithm to obtain the path that point-to-point transmission arrives the soonest, general term " suggestion driving path ".Thereafter, road guide equipment is again according to the function of this suggestion driving path and road location, at any time registration of vehicle travel path and point out turning crossing, the place ahead and turn direction to the user.In addition, the road guide function also at any time monitoring vehicle whether go along suggestion driving path.
Signal carrier-to-noise ratio (the CN that existing vehicle mounted GPS guidance system sends; Carrier/Noise) very easily receive overcovers such as buildings refraction and tunnel, overpass to cover and influence inevitably; It is not satisfied that the degree of accuracy of the height parameter of especially existing vehicle mounted GPS guidance system is also made us; Such as, vehicle ' when having the highway section of overpass, because road on the overpass and the road stacked on top of one another under the overpass; On the geographic position, belong to same highway section; Vehicle mounted GPS guidance system this moment (being navigation software) just is difficult to recognize vehicle and goes on the overpass or under the overpass, and then is easy to cause erroneous judgement and gives the traffic route that makes mistake suggestion, and making the user need spend the more time on the contrary can reach the destination.
There is mirror so; How to develop a kind of accurately positioned vehicle traveling-position and in time give the correct airmanship that guides,, save user's running time really to promote the accuracy of vehicle mounted GPS guidance system height parameter; Real is in the correlative technology field, problem demanding prompt solution.
[summary of the invention]
For solving all shortcomings of above-mentioned prior art, a purpose of the present invention is to provide a kind of running position identifying system and method, to solve the disappearance that existing navigation software is difficult to accurate identification road location.
For reaching above-mentioned purpose and other purpose, the present invention promptly discloses a kind of running position identifying system and method, and running position identifying system of the present invention is applied to have reception Global Positioning System (GPS) (Global Position System; In the electronic installation of the navigation signal that GPS) is transmitted, and this electronic installation is equipped with navigation software, and this running position identifying system comprises a setting module, a detecting module, a comparing module, a processing module and a reminding module.This setting module in order to set this electronic installation receive navigation signal carrier-to-noise ratio threshold value and store; This detecting module is in order to detect the carrier-to-noise ratio that this electronic installation receives navigation signal; This comparing module is compared according to the carrier-to-noise ratio that this setting module preset threshold and this detecting module are detected, and during less than this threshold value, exports a detectable signal in this carrier-to-noise ratio; After this processing module receives the detectable signal of this comparing module output, launch a height detecting signal whether to have barrier in the predetermined detection range in the top of surveying this electronic installation, if then export first cue; This reminding module makes this navigation software prompting road location after receiving this first cue.
Another embodiment of running position identifying system of the present invention comprises: detecting module, and it is in order to detect the carrier-to-noise ratio that this electronic installation receives navigation signal; Comparing module when it is compared out carrier-to-noise ratio that this detecting module detects and diminishes gradually, is exported a detectable signal; Processing module after it receives the detectable signal of this comparing module output, is launched a height detecting signal whether to have barrier in the predetermined detection range in the top of surveying this electronic installation, if then export one first cue; And reminding module, after it receives this first cue, make this navigation software prompting road location.
Road location of the present invention discrimination method is applied to have reception Global Positioning System (GPS) (Global Position System; In the electronic installation of the navigation signal that GPS) is transmitted, and this electronic installation is equipped with navigation software, and this road location discrimination method may further comprise the steps, at first set the navigation signal that this electronic installation receives carrier-to-noise ratio threshold value and store; Then detect the carrier-to-noise ratio that this electronic installation receives navigation signal; And compare according to the carrier-to-noise ratio of this preset threshold and this detecting; And in this carrier-to-noise ratio during less than this threshold value; Survey the top of this electronic installation and be scheduled to whether have barrier in the detection range, to have barrier this navigation software prompting road location in season.
May further comprise the steps among another embodiment of discrimination method of road location of the present invention: detect the carrier-to-noise ratio that this electronic installation receives navigation signal; And the carrier-to-noise ratio that detected of comparison is when diminishing gradually, surveys in the predetermined detection range in top of this electronic installation whether have barrier, if then make this navigation software prompting road location.
In sum, running position identifying system of the present invention and method are passed through the reference frame of the carrier-to-noise ratio of navigation signal as the navigation height, so as to solving the disappearance that is difficult to accurate identification road location in the existing airmanship.
[description of drawings]
Fig. 1 illustrates the basic framework block schematic diagram of running position identifying system of the present invention.
Fig. 2 illustrates the variation of carrying the value of making an uproar that is detected when vehicle of the present invention is passed through surface road, this surface road and overpass infall and this overpass.
Fig. 3 illustrates the schematic flow sheet of road location of the present invention discrimination method.
[embodiment]
As shown in Figure 1, the basic framework block schematic diagram of its running position identifying system of the present invention.Running position identifying system 10 of the present invention is applied to have Global Positioning System (GPS) (Global Positioning System; GPS) in the electronic installation 1 of receiver 11; And this electronic installation 1 is equipped with navigation software; By this Global Positioning System (GPS) receiver 11 to receive the navigation signal that Global Positioning System (GPS) 100 is transmitted; In present embodiment, this electronic installation 10 is the example explanation with automobile-used Global Positioning System (GPS) guider only, and electronic installation 1 of the present invention can be the devices such as personal digital assistant, mobile phone, intelligent mobile phone or mobile computer with GPS navigation function.
This running position identifying system 10 comprises setting module 101, detecting module 102, comparing module 103, processing module 104 and reminding module 105.
The threshold value of the carrier-to-noise ratio of the navigation signal that this setting module 101 receives in order to the Global Positioning System (GPS) receiver of setting this electronic installation 1 11.In present embodiment, this electronic installation 1 receives the carrier-to-noise ratio (Carrier/Noise of this navigation signal; CN) influenced by environment and change, that is, and when the environment of vehicle ' to open area (open sky); The carrier-to-noise ratio of this navigation signal is usually than higher; When the location under vehicle ' to avenue or the overpass, receive overcovers such as buildings refraction and overpass to cover and influence, the carrier-to-noise ratio of this navigation signal is lower usually; So in present embodiment, the threshold value of the carrier-to-noise ratio of the navigation signal that sets obtains via several times data acquisition and statistics.
This detecting module 102 is in order to detect the carrier-to-noise ratio that this electronic installation 1 receives navigation signal.
The carrier-to-noise ratio that the threshold value that this comparing module 103 sets according to this setting module 101 and this detecting module 102 are detected is compared, and during less than this threshold value, exports a detectable signal in this carrier-to-noise ratio.After this processing module 104 receives the detectable signal of these comparing module 103 outputs; Launch a height detecting signal whether to have barrier in the predetermined detection range in the top of surveying this electronic installation 1; If; Then export first cue, and when being sent to this reminding module 105, be under the overpass to make these reminding module 105 these road locations of prompting; Otherwise; If not; Represent that then this road location is on the overpass, particularly, this reminding module 105 is in order to link up with navigation software; Judge the driver for navigation software and whether travel on the overpass in the travel route of being planned or under the overpass, increase whereby and judge that the driver travels on the correctness under the overpass or on the overpass.
In present embodiment, this processing module 104 also comprises a transmitter/receiver unit 1040 and judging unit 1041.This transmitter/receiver unit 1040 is met the return signal that barrier is reflected in order to the firing altitude detectable signal and in order to receive this height detecting signal; This judging unit 1041 is in order to judging whether this transmitter/receiver unit 1040 receives the return signal in the top preset distance of this electronic installation 1, if, then export this first cue, if not, then export second cue.In present embodiment, when this first cue was sent to this reminding module 105, it was under the overpass that this reminding module 105 makes this this road location of navigation software prompting; When this second cue is sent to this reminding module 105, this reminding module 105 makes the top clear of this this road location of navigation software prompting, for example travels on the overpass.The predetermined detection range in the top of this electronic installation is 5 to 10 meters, so is not limited thereto, and in different environment, the predetermined detection range in the top of this electronic installation also can be higher or lower.
With regard to the foregoing description, it distributes to carrier-to-noise ratio in advance and defines a threshold value, to compare with this threshold value according to actual value of making an uproar of carrying that is detected, as the basis for estimation of navigation height.Except that this; Among another embodiment of road location of the present invention device for identifying; Can not must set this threshold value; But whether the carrier-to-noise ratio that is detected by this comparing module 103 these detecting modules 102 of comparison diminish gradually, if diminish gradually and in this processing module 104 detects the predetermined detection range in top of this electronic installation 1, have barrier again, then this driving position of expression is under the overpass.
Moreover, for example, as shown in Figure 2; The variation of carrying the value of making an uproar that it is detected when passing through surface road A, this surface road and overpass infall B and this overpass C in order to the explanation vehicle, wherein, the carrier-to-noise ratio (CN) that is detected in this surface road A highway section is 15; The carrier-to-noise ratio that is detected in this surface road and overpass infall B is 19, and the carrier-to-noise ratio that is detected in this overpass C highway section is 30, and hence one can see that; Because this overpass C belongs to the environment of open area (open sky), so the carrier-to-noise ratio of this navigation signal is usually than higher, when vehicle ' to surface road or this surface road and overpass infall; Satellite-signal is subject to influences such as buildings refraction or covering; And carrier-to-noise ratio is reduced, and be to go to overhead road (being on the overpass) by surface road when carrier-to-noise ratio increases the course of then representing vehicle gradually, opposite; When the carrier-to-noise ratio course of then representing vehicle that diminishes gradually is to be gone to surface road by overpass (being on the overpass); And have barrier if detect in the predetermined detection range above this vehicle this moment, and then this driving position of expression is overpass below (being under the overpass).
As shown in Figure 3, the schematic flow sheet of its road location of the present invention discrimination method.At first execution in step S1 sets the threshold value that this electronic installation receives the carrier-to-noise ratio of navigation signal.In present embodiment, this electronic installation receives the navigation signal that satellite transmitted through the interior Global Positioning System (GPS) receiver of building, and the carrier-to-noise ratio of this navigation signal is influenced by environment inevitably and changes; That is, when the environment of vehicle ' to open area, the carrier-to-noise ratio of this navigation signal is usually than higher; When the location under vehicle ' to avenue or the overpass; Influenced by buildings, the carrier-to-noise ratio of this navigation signal is lower usually, so in present embodiment; The threshold value of the carrier-to-noise ratio of the navigation signal that sets obtains via several times data acquisition and statistics, then proceeds to step S2.
In this step S2, detect the carrier-to-noise ratio of the navigation signal that this electronic installation receives, then proceed to step S3.
In this step S3, compare according to the carrier-to-noise ratio of this preset threshold and this detecting, then proceed to step S4.
In this step S4, whether the carrier-to-noise ratio of judging this detecting is less than this threshold value, if then proceed to step S5; If not, then proceed to step S7.
In step S5, survey the top of this electronic installation and be scheduled to whether have barrier in the detection range, if, then to step S6; If not, then to step S7; In present embodiment, the predetermined detection range in the top of this electronic installation is 5 to 10 meters, so is not limited thereto, and in different environment, the predetermined detection range in the top of this electronic installation also can be higher or lower.In present embodiment; Survey whether have barrier in the predetermined detection range in top of this electronic installation mode by the firing altitude detectable signal; And receive the return signal that this height detecting signal chance barrier is reflected, represent that then the top of this electronic installation has barrier.
In step S6, the top of prompting road location has barrier, for example travels under the overpass, can finish the treatment step of road location of the present invention discrimination method.
In step S7, there is not barrier the top of prompting road location, for example travels on the overpass, can finish the treatment step of road location of the present invention discrimination method.
Whether moreover what must propose explanation is, among another embodiment of road location of the present invention discrimination method, can omit the described step of previous embodiment S1 to S4, diminish gradually and change the carrier-to-noise ratio that is detected with comparison, if diminish gradually, then proceeds to step S5; If do not diminish gradually, then proceed to step S7.
In sum, running position identifying system of the present invention and method are through preestablishing the threshold value of a navigation signal carrier-to-noise ratio; Then; Carrier-to-noise ratio according to this preset threshold and detecting is compared; And in this carrier-to-noise ratio during less than this threshold value; Surveying the top of this electronic installation is scheduled to whether have barrier in the detection range and export cue and point out the road location; Also promptly, when having the highway section that overpass and surface road overlap in the travel route that navigation software is cooked up, but whether travel on the overpass in the travel route that navigation software plans or the surface road under the overpass through running position identifying system of the present invention and method Auto-Sensing driver; The judgement of navigation height parameter is provided, judges that so as to increasing the driver travels on the correctness on surface road or the overpass.Therefore, use above-mentioned many shortcomings that the present invention can overcome prior art, and tool high industrial utilization and progressive.
Claims (9)
1. running position identifying system, it is applied to have reception Global Positioning System (GPS) (Global Position System; In the electronic installation of the navigation signal that GPS) is transmitted, and this electronic installation is equipped with navigation software, it is characterized in that this running position identifying system comprises:
Setting module, it is in order to the threshold value of the carrier-to-noise ratio of the navigation signal setting this electronic installation and receive and store;
Detecting module, it is in order to detect the carrier-to-noise ratio that this electronic installation receives navigation signal;
Comparing module, it is compared according to the carrier-to-noise ratio that this setting module preset threshold and this detecting module are detected, and during less than this threshold value, exports a detectable signal in this carrier-to-noise ratio;
Processing module, this processing module also comprises:
Transmitter/receiver unit; After it receives the detectable signal of this comparing module output; Launch a height detecting signal whether to have barrier in the predetermined detection range in the top of surveying this electronic installation, this transmitter/receiver unit is met the return signal that barrier is reflected in order to the firing altitude detectable signal and in order to receive this height detecting signal;
Judging unit, it is in order to judging whether this transmitter/receiver unit receives the return signal in the top preset distance of this electronic installation, if, then export first cue, if not, then export second cue;
Reminding module after if it receives this first cue, has barrier with the top that makes this this road location of navigation software prompting; After if this reminding module receives this second cue, so that this reminding module makes the top clear of this this road location of navigation software prompting.
2. running position identifying system as claimed in claim 1 is characterized in that: the predetermined detection range in the top of this electronic installation is 5 to 10 meters.
3. running position identifying system, it is applied to have reception Global Positioning System (GPS) (Global Position System; In the electronic installation of the navigation signal that GPS) is transmitted, and this electronic installation is equipped with navigation software, it is characterized in that this running position identifying system comprises:
Detecting module, it is in order to detect the carrier-to-noise ratio that this electronic installation receives navigation signal;
Comparing module when it is compared out carrier-to-noise ratio that this detecting module detects and diminishes gradually, is exported a detectable signal;
Processing module, this processing module also comprises:
Transmitter/receiver unit; After it receives the detectable signal of this comparing module output; Launch a height detecting signal whether to have barrier in the predetermined detection range in the top of surveying this electronic installation, this transmitter/receiver unit is met the return signal that barrier is reflected in order to the firing altitude detectable signal and in order to receive this height detecting signal;
Judging unit, it is in order to judging whether this transmitter/receiver unit receives the return signal in the top preset distance of this electronic installation, if, then export first cue, if not, then export second cue;
Reminding module after if it receives this first cue, has barrier with the top that makes this this road location of navigation software prompting; After if this reminding module receives this second cue, so that this reminding module makes the top clear of this this road location of navigation software prompting.
4. running position identifying system as claimed in claim 3 is characterized in that: the predetermined detection range in the top of this electronic installation is 5 to 10 meters.
5. road location discrimination method, it is applied to have reception Global Positioning System (GPS) (Global Position System; In the electronic installation of the navigation signal that GPS) is transmitted, and this electronic installation is equipped with navigation software, it is characterized in that this road location discrimination method may further comprise the steps:
Set this electronic installation receive navigation signal carrier-to-noise ratio threshold value and store;
Detect the carrier-to-noise ratio that this electronic installation receives navigation signal;
Carrier-to-noise ratio according to this preset threshold and this detecting is compared; And in this carrier-to-noise ratio during less than this threshold value; Survey in the predetermined detection range in top of this electronic installation whether have barrier, survey the processing that whether has barrier in the predetermined detection range in top of this electronic installation and may further comprise the steps:
The firing altitude detectable signal;
Receive this height detecting signal and meet the return signal that barrier is reflected;
Judge whether to receive the interior return signal of top preset distance of this electronic installation, if, then make the top of this this road location of navigation software prompting have barrier, if not, then make the top clear of this this road location of navigation software prompting.
6. road location as claimed in claim 5 discrimination method is characterized in that: when comparing out this carrier-to-noise ratio greater than this threshold value, making this this road location of navigation software prompting is on the overpass.
7. road location as claimed in claim 5 discrimination method is characterized in that: the predetermined detection range in the top of this electronic installation is 5 to 10 meters.
8. road location discrimination method, it is applied to have reception Global Positioning System (GPS) (Global Position System; In the electronic installation of the navigation signal that GPS) is transmitted, and this electronic installation is equipped with navigation software, it is characterized in that this road location discrimination method may further comprise the steps:
Detect the carrier-to-noise ratio that this electronic installation receives navigation signal;
When the carrier-to-noise ratio that detected of comparison diminishes gradually, survey in the predetermined detection range in top of this electronic installation whether have barrier, survey the processing that whether has barrier in the predetermined detection range in top of this electronic installation and may further comprise the steps:
The firing altitude detectable signal;
Receive this height detecting signal and meet the return signal that barrier is reflected;
Judge whether to receive the interior return signal of top preset distance of this electronic installation, if, then make the top of this this road location of navigation software prompting have barrier, if not, then make the top clear of this this road location of navigation software prompting.
9. road location as claimed in claim 8 discrimination method is characterized in that: the predetermined detection range in the top of this electronic installation is 5 to 10 meters.
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| CN2008100296787A CN101634560B (en) | 2008-07-23 | 2008-07-23 | Running position identifying system and method |
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| CN2008100296787A CN101634560B (en) | 2008-07-23 | 2008-07-23 | Running position identifying system and method |
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| CN101634560B true CN101634560B (en) | 2012-05-23 |
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| CN104864863B (en) * | 2014-02-21 | 2019-08-27 | 联想(北京)有限公司 | A kind of routing resource and electronic equipment |
| WO2017117716A1 (en) * | 2016-01-05 | 2017-07-13 | 冯旋宇 | Outdoor positioning management method and system for smart city |
| CN105572699B (en) * | 2016-01-18 | 2018-09-14 | 百度在线网络技术（北京）有限公司 | Method and device for detecting fix drift |
| US10234568B2 (en) * | 2016-05-12 | 2019-03-19 | GM Global Technology Operations LLC | GNSS vehicle location involving overlapping roads |
| CN107657810B (en) * | 2016-07-26 | 2020-05-08 | 高德信息技术有限公司 | Method and device for recognizing actions of upper viaduct and lower viaduct |
| CN107644530A (en) * | 2017-09-04 | 2018-01-30 | 深圳支点电子智能科技有限公司 | Vehicle travel determines equipment and Related product |
| CN109470256A (en) * | 2017-09-07 | 2019-03-15 | 高德信息技术有限公司 | A kind of localization method and device |
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| CN1948911A (en) * | 2006-11-15 | 2007-04-18 | 倚天资讯股份有限公司 | Method of judging carriage position on different height roads |
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| CN101173859A (en) * | 2006-10-31 | 2008-05-07 | 佛山市顺德区顺达电脑厂有限公司 | Inducing navigation device and method thereof |
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