CN101196401A - Voice navigation device for high-speed ramification point - Google Patents

Abstract

The invention discloses a voice guidance device of high-speed bifurcation, which comprises a road modeling module used for building the corresponding network module to the road in electronic map and building the topology relationship graph among roads; a voice guidance database, used for storing voice information; a path programming module, used for fixing the driving track of vehicle; a GPS positioning module, used for fixing the current position of vehicle; a voice analyzing module, used for fixing the voice trigger point of the bifurcation according to the network module built by the road modeling module and the driving track fixed by the path programming module; a guidance voice module, used for taking out the corresponding voice information from the voice guidance database to play according to the current position of vehicle fixed by the GPS positioning module and the sound trigger point achieved from the sound analyzing module. By adopting the techincal scheme in the invention, accurate and high-efficient guiding can be achieved.

Description

The voice guiding device of high-speed ramification point

Technical field

The present invention relates to the electronic navigation field, refer to a kind of voice guiding device of high-speed ramification point especially.

Background technology

GPS (Global Position System, GPS) main application of onboard navigation system is for the vehicle driver provides from origin to destination detailed navigation Service, and the navigation speech prompting of vehicle ' during to the crossing then is one of The key factor in the whole navigation procedure.Traditional automobile navigation method can be pointed out " left-hand rotation ", " right-hand rotation " at the crossing, this air navigation aid is suitable for for general crossroad or T-shaped road junction, but for the branch point on expressway or the through street, apply mechanically the custom that fixing voice suggestion pattern may and not meet most of users fully.

As shown in Figure 1, application number is that the Chinese patent of CN01138262.7 discloses the phonetic navigation method of a kind of navigational system at complex crossing.Vehicle is positioned at the A point, vehicle will be forwardly crossing B turn left, speech guide system can be pointed out " the place ahead * * turn in rice " left before turning, the mode of promptly using which crossing, the place ahead whither to turn comes vehicle is navigated.Do such voice suggestion without any problem in the intersection of ordinary road, but for the branch point on for example expressway or the through street (as shown in Figure 2), such voice suggestion is just not too accurate.Described branch point refers to that a road is divided into two or many separations that lead to the road of different directions, as shown in Figure 3.

A branch point on the expressway as shown in Figure 2.For the branch point on expressway or the through street, if when adopting prior art that it is navigated, if vehicle is just in figure during left number second lanes, originally need not changing Lane travels as usual and just can realize turning left, but occurring Voice Navigation prompting user here suddenly turns left, that gives the people like this feels very lofty, is separated into both direction because actual conditions only are each tracks at this, does not have the sensation of significantly turning left; Otherwise, if vehicle just along right lane only, the prompting of Zhuan Waning left can not bring comparatively tangible dependable navigation information to the user.

A kind of phonetic navigation method of vehicle at complex crossing of pointing out disclosed in the literary composition of Chinese patent application CN200410024645.5, this method adopts the phonetic prompt method of " front n rice please be walked right-hand x bar road " or " front n rice please be walked left x bar road " or " front craspedodrome " only pointing out " left side ", " right side " to can not determine the complex crossing that is meant which bar road.Can't make accurate and effective but still can't solve before the branch point on above-mentioned for example expressway or the through street, meet the air navigation aid of user's cognition again.

Summary of the invention

The problem to be solved in the present invention provides a kind of voice guiding device of high-speed ramification point accurately and effectively.

In order to address the above problem, the technical scheme of the voice guiding device of high-speed ramification point of the present invention comprises:

The road modeling module, being used for according to the real road situation is that the road of electronic chart is set up its corresponding network model and set up topological relation figure between the road;

Speech navigation databank is used to deposit voice messaging;

Path planning module is used for determining the driving path of vehicle;

The GPS locating module is used for determining the current location of vehicle;

Speech analysis module, the driving path that network model of being set up according to described road modeling module and described path planning module are determined is determined the speech trigger point of branch point;

The navigation speech module, the speech trigger point that obtains according to the determined vehicle current location of described GPS locating module and described speech analysis module takes out corresponding voice messaging and is play from described speech navigation databank.

Described speech navigation databank comprises following field:

The voice attributes field is used for the unique identification voice messaging;

The voice messaging field is used to represent every kind of pairing navigation speech of described voice attributes.

Described voice messaging comprises following information:

The sidecar road that keeps left travels;

Travel along middle lane;

Lanes on the right side.

Compared with prior art, the beneficial effect of the voice guiding device of high-speed ramification point of the present invention is:

At first,, the speech trigger point can be set, the feasible more accurate and effective of navigating at the branch point place owing to adopt speech analysis module.

In addition, the effect accurate and effective that also makes voice suggestion by the voice suggestion of adopting " lean on left/right, travel " along middle lane.

Description of drawings

Fig. 1 is the vertical view of intersection;

Fig. 2 is the vertical view of expressway branch point;

Fig. 3 is the synoptic diagram of branch point;

Fig. 4 is the voice guiding device structural drawing of expressway of the present invention branch point.

Fig. 5 A is the real road synoptic diagram with expressway branch point;

Fig. 5 B is the network model synoptic diagram of Fig. 5 A.

Embodiment

As shown in Figure 4, the voice guiding device of expressway of the present invention branch point comprises:

Road modeling module 1, being used for according to the real road situation is that the road of electronic chart is set up its corresponding network model and set up topological relation figure between the road;

Speech navigation databank 5 is used to deposit voice messaging;

Path planning module 2 is used for determining the driving path of vehicle;

GPS locating module 3 is used for determining the current location of vehicle;

Speech analysis module 4, the driving paths that network model of being set up according to described road modeling module 1 and described path planning module 2 are determined are determined the speech trigger point of branch point;

Navigation speech module 6, the speech trigger point that obtains according to described GPS locating module 3 determined vehicle current locations and described speech analysis module 4 takes out corresponding voice messaging and is play from described speech navigation databank 5.

Described speech navigation databank 5 comprises following field:

The voice attributes field is used for the unique identification voice messaging;

The voice messaging field is used to represent every kind of pairing navigation speech of described voice attributes.

Described voice messaging comprises following information:

The sidecar road that keeps left travels;

Travel along middle lane;

Lanes on the right side.

Now the voice guiding device with a kind of expressway branch point of certain company exploitation is that example describes technical scheme of the present invention in detail.

For road modeling module 1, implementation procedure is as follows:

According to road conditions picture track road on electronic chart of reality, and the property value of every road correspondence filled out in corresponding database, for example: the number of track-lines of every section road correspondence, category of roads, current direction, road name, whether charge or the like.Between each bar road and other roads that links to each other, set up node, with the annexation between expression road and the road.So repeatedly, up to all roads all are drawn on the map, and set up the relation that is connected, just formed road network.

Be a real road with expressway branch point shown in Fig. 5 A, wherein, M is a branch point, and road is ab and ac.In this example, behind the real road shown in Fig. 5 A, utilize the road of on electronic chart, drawing a part earlier, draw the road of b part and c part then, make node M at the connecting place of a, b, c part again, promptly obtain the road network model figure shown in Fig. 5 b after finishing.Distinguish the attribute data of typing a, b, these three sections roads of c then.And then a corresponding road data and corresponding attribute information be stored in the navigation electronic, and, set up topological incidence relation as shown in table 1 at road and node data:

Node	Road
		M	a，b，c

Table 1

Speech navigation databank 5 is as shown in table 2 in this example:

The voice attributes field	The voice messaging field
		2	The sidecar road that keeps left travels
3	Travel along middle lane
		4	Lanes on the right side

Table 2

Wherein, when voice attributes was " 2 ", corresponding voice were " the sidecar road that keeps left travels "; When voice attributes was " 3 ", corresponding voice were " travelling along middle lane "; When voice attributes was " 4 ", corresponding voice were " lanes on the right side ".

Path planning module 2 is implemented as follows:

(1) finds out the road at coordinate place, described destination;

(2) find out the road at described starting point coordinate place;

(3) find out other road that links to each other with the road at described starting point coordinate place, and one the shortest road of selected distance therefrom;

(4) judge whether the described road of choosing in the above-mentioned steps is the road at coordinate place, described destination, (5) are with the described road chosen in the above-mentioned steps road repeated execution of steps (3) as starting point coordinate place if not;

(6) successively the road of all selections is stringed together to obtain a bar navigation circuit.

GPS locating module 3 implementation procedures are as follows:

Receive instrument by GPS and receive the locating information that gps satellite is sent back, calculate the coordinate of the current loca of automobile, this coordinate is presented at the map that is the center with this point on the navigating instrument corresponding to the corresponding coordinate points on the electronic chart on the navigating instrument.

The implementation procedure of speech analysis module 4 is as follows:

(1) guidance path that obtains along path planning module 2, article one road from the starting point place, judge current road and next bar road annexation, whether turn, road conditions or the like information, the information that obtains according to judgement, the speech trigger point is approximately set up in preceding 1000 meters in the place that voice suggestion is pointed on road, when described speech trigger point refers to travel to this, play the point of corresponding voice suggestion.For example shown in Fig. 5 b, can keep left at a M place or lanes on the right side, then on the road at preceding 1000 meters of a M, set up a speech trigger point.Enter next bar road then, so along path searching, until setting up the speech trigger point for all roads.

(2) judge the voice messaging that specifically calls at described speech trigger point place according to the concrete condition and the relations such as turning, speed limit of actual travel road.For example shown in Fig. 5 b, according to guidance path, track route is a → M → b, judges to the sidecar road that keeps left travels from the travel direction of a → M → b, i.e. voice attributes field " 2 " in the corresponding tables 2.

(3) according to the voice attributes field, the retrieval speech database finds corresponding voice document.In speech database, there is corresponding relation as following table 3:

The voice attributes field	The voice document name
		2	51000002.wav
3	51000003.wav
		4	51000004.wav

Table 3

In table 3, the voice document " 51000002.wav " by name that voice attributes field " 2 " is corresponding; The voice document " 51000003.wav " by name that voice attributes field " 3 " is corresponding; The voice document " 51000004.wav " by name that voice attributes field " 4 " is corresponding.

(4) be equipped with corresponding voice document name at the speech trigger point.The voice document name that retrieves in step (3) is stored in speech trigger point place.

For example shown in Fig. 5 b: the voice document name " 51000002.wav " of the speech trigger point place's typing correspondence before a M.

The implementation procedure of navigation speech module 6 is as follows:

Obtain the current traveling-position of vehicle according to GPS locating module 3, when this position is speech trigger point place, triggers and play speech events, promptly play the voice of this trigger point correspondence.For example shown in Fig. 5 b: during speech trigger point before driving to a M, according to the filename that is stored in the trigger point " 51000002.wav ", play this voice document, promptly the sound of Bo Chuing is " the sidecar road that keeps left travels ".

In sum, adopt technical scheme of the present invention, can make that navigation is more accurate.

Claims (3)

1. the voice guiding device of a high-speed ramification point is characterized in that, comprising:

The road modeling module, being used for according to the real road situation is that the road of electronic chart is set up its corresponding network model and set up topological relation figure between the road;

Speech navigation databank is used to deposit voice messaging;

Path planning module is used for determining the driving path of vehicle;

The GPS locating module is used for determining the current location of vehicle;

Speech analysis module, the driving path that network model of being set up according to described road modeling module and described path planning module are determined is determined the speech trigger point of branch point;

The navigation speech module, the speech trigger point that obtains according to the determined vehicle current location of described GPS locating module and described speech analysis module takes out corresponding voice messaging and is play from described speech navigation databank.

2. the voice guiding device of high-speed ramification point as claimed in claim 1 is characterized in that, described speech navigation databank comprises following field:

The voice attributes field is used for the unique identification voice messaging;

The voice messaging field is used to represent every kind of pairing navigation speech of described voice attributes.

3. the voice guiding device of high-speed ramification point as claimed in claim 2 is characterized in that, described voice messaging comprises following information:

The sidecar road that keeps left travels;

Travel along middle lane;

Lanes on the right side.

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