DE102004057692A1 - Navigation assistance for locomotion unit, makes validity check whether locomotion unit will follow provided route or not, where assistance provides preferred route and outputs drive references that guide user along route - Google Patents

Abstract

The assistance determines possible routes from a place of departure to a destination on the basis of route net data, in particular on the basis of road network data. The assistance provides preferred route, and outputs drive references, which guide the user along the provided route. The navigation assistance is designed to make a validity check whether the locomotion unit will follow the provided route or not. Independent claims are also included for the following: (A) a method for navigation of a locomotion unit (B) a computer program product for implementing the method for navigation of the locomotion unit (C) an application of the navigation assistance.

Description

technical area

The The present invention relates to a navigation assistant according to the preamble of claim 1 and a method according to the preamble of the claim Third

Conventionally, there is always the problem that navigation devices for departing from or leaving the predetermined route too long maintain the position on this predetermined route until the actual position is taken over by the route guidance. In these cases, incorrect driving recommendations may occur according to the wrong position on the route. This will be illustrated by an example:
The driver drives on a main road without crossing. The route leads at the next exit at an acute angle from the main road. The driver remains contrary to the driving recommendation on the main road. If the driver had driven off the exit, he should have turned right after two hundred meters. Since the route branches off from the main road, the route guidance position also leaves the main road. Since the location based on the conventional Positionplausibilisierung after two hundred meters, the position has not yet set on the Bundsstraße, the guidance gives a "turn right now" out. At this moment, the driver drives straight over the bridge on the main road and wonders why the bridge should turn right. After a few hundred meters, the route guidance then takes over the position on the main road, because then take the conventional plausibility checks.

This Example leaves to reflect on many situations, in the form of wrong driving recommendations often be experienced. Such wrong driving recommendations arise, if conventional navigation devices recognize very late, that a means of transportation leaves a predetermined route, namely first after the means of transportation has already left the route. This means that conventional navigation devices have a Plausibility check to that effect make sure that the means of transportation followed the given route is or not.

For such Plausibility check or plausibility check potential Positions in the road network Conventionally, the Falrzeugposition, the vehicle angle and the course of the completed Track used at close range. In summary, the plausibility check is based conventionally on a geometric comparison between distance covered Route and digitized road network.

Desirable would it be However, to eliminate such wrong driving recommendations or at least to reduce the number of such wrong driving recommendations.

From the publication DE 102 42 125 A1 a navigation system is known, which does not bring any corrective messages after leaving a predetermined route when the means of locomotion is in a user-known area. However, this system only works when the means of transportation is in a user-frequented area.

Presentation of the invention: Task, solution, advantages

outgoing from the disadvantages and shortcomings set out above as well as in appreciation of the prior art is the present invention The task is based on a navigation assistant of the aforementioned Art, a navigation system associated with this navigation assistance as well as to develop a method of the type mentioned in the beginning, that no wrong, the user irritating and / or disturbing driving recommendations be issued.

These Task is by a navigation assistant with the in the claim 1 specified characteristics, by a navigation system with the im Claim 2 specified characteristics and by a method with the solved in claim 3 specified characteristics. Advantageous embodiments and appropriate training The present invention is characterized in the respective subclaims.

therefore For example, the present invention is based on the extension of the criteria to check the plausibility of the current position of the means of transport. By the new criteria will avoid wrong system positions, and at least one of the navigation assistance and / or the navigation system associated with, for example, G [lobal] P [ositioning] S [ystem] basis working locating / processing unit can the possible Rate positions faster.

Either in the navigation assistance according to the present Invention as well as the method according to the present invention supports the plausibility check is advantageous on at least one following the driving recommendations or the Deviating from or leaving the given route indexing Parameter value.

• – die Geschwindigkeit, zum Beispiel mindestens eine Geschwindigkeitsänderung, und/oder
• – die Richtung, zum Beispiel mindestens eine Winkeländerung in der Richtung, des Fortbewegungsmittels herangezogen werden. Zu diesem Zweck wird der Parameterwert vorteilhafterweise fortlaufend erfasst bzw. werden die Parameterwerte vorteilhafterweise fortlaufend und/oder vorteilhafterweise gleichzeitig erfasst.

As such parameter value can

• The speed, for example at least one speed change, and / or
• - The direction, for example, at least one change in angle in the direction of the means of locomotion are used. For this purpose, the parameter value is advantageously recorded continuously or the parameter values are advantageously recorded continuously and / or advantageously simultaneously.

Of the Parameter value, in particular the speed and / or the direction of movement is advantageously stored, for example by means of at least a storage unit associated with the location / processing unit or memory module.

Of Further, in an advantageous embodiment of the present Invention by comparing the current parameter value, in particular the current speed and / or the associated current direction of travel, with at least one stored, for following the driving recommendations by the user typical reference value a probability for a follow the driving recommendations calculated.

With In other words, in an advantageous embodiment the present invention, the plausibility of possible Positions in the road network extended by a dynamic vehicle model. With the help of this dynamic Vehicle model can, for example, speed and associated angle change the probability for obvious decision points in the digital road network be determined.

This Vehicle model is advantageously vehicle-specific in detail and is preferably during the drive from the system, in particular from the navigation assistant, "learned" (example: A truck accelerates far less than a car and also drives slower through bends). By the determined probability it is possible, far before a decision point Position paths for to lock the finishing, making wrong driving recommendations not even be given.

The The present invention further relates to a computer program product, comprising at least one program part for carrying out a method according to the above set forth.

• – auf dem mindestens ein Computerprogrammprodukt gemäß der vorstehend dargelegten Art aufgezeichnet und/oder gespeichert ist und
• – der zum Aktualisieren und/oder zum Updaten mindestens einer Navigationsassistenz gemäß der eingangs dargelegten Art vorgesehen ist.

Moreover, the invention relates to a machine-readable, in particular computer-readable, data carrier,

• - is recorded and / or stored on the at least one computer program product according to the kind set forth above, and
• - Which is provided for updating and / or updating at least one navigation assistant according to the kind set forth.

The Finally, the present invention relates to the use of at least a navigation assistant according to the above type and / or a procedure as set out above and / or at least one computer program product according to the above set forth in at least one navigation system.

Short description the drawings

As already discussed above, there are various possibilities for embodying and developing the teaching of the present invention in an advantageous manner. For this purpose, reference is made on the one hand to the claims subordinate to claims 1 and 3, on the other hand, further embodiments, features and advantages of the present invention hereinafter with reference to the by 1 to 3 illustrated embodiment explained in more detail.

It shows:

1 a schematic representation of a first embodiment of a navigation system according to the present invention, which has a navigation assistance according to the present invention and operates according to the method according to the present invention;

2 in a schematic representation of a first example of a traffic situation in which the navigation system off 1 can be used; and

3 in a schematic representation of a second example of a traffic situation in which the navigation system off 1 can be used.

Best way to execute the invention

In 1 is a navigation system 200 according to the present invention with a navigation assistance 100 represented according to the present invention. According to the invention, the navigation assistance 100 designed to make at least one plausibility check as to whether the means of transportation of a given route 12 (see. 2 ) will follow or not.

The navigation assistant 100 has a location / processing unit 10 for determining possible routes from a starting point to a destination and to specify the preferred route among these possible routes 12 on. The location / processing unit 10 communicates with one (or more) route guidance unit (s) 20 for issuing driving recommendations that guide the means of transport along the predetermined route 12 to lead.

• – die Geschwindigkeit bzw. Geschwindigkeitsänderung und
• – die Richtung, insbesondere eine Winkeländerung der Richtung,

des Fortbewegungsmittels fortlaufend und gleichzeitig erfasst werden können.Furthermore, the location processing unit communicates 10 with one or more sensors 30 through which

• - the speed or speed change and
• The direction, in particular an angle change of the direction,

of the means of locomotion can be recorded continuously and simultaneously.

The sensor group 30 is also designed to continuously detect the current position of the means of locomotion, wherein the location / processing unit 10 determines the distance covered by the vehicle.

• – das Befolgen der Fahrempfehlungen oder
• – das Abweichen von bzw. das Verlassen der vorgegebenen Route 12 indizierende Parameterwerte, nämlich auf die Geschwindigkeit und auf die Fortbewegungsrichtung. Des Weiteren kann sich die Plausibilitätsprüfung auf eine Vergleich zwischen der vom Fortbewegungsmittel zurückgelegten Strecke und der vorgegebenen Route 12 stützen.

In the illustrated embodiment, the plausibility check is based on

• - following the driving recommendations or
• - the departure from or the departure of the given route 12 indicative parameter values, namely the speed and the direction of travel. Furthermore, the plausibility check can be based on a comparison between the distance traveled by the means of transportation and the predetermined route 12 support.

• – den Parameterwert, insbesondere die Geschwindigkeit und die Fortbewegungsrichtung, in mindestens einer Speichereinheit 40, insbesondere in mindestens einer Datenbank, zu speichern und
• – durch Vergleichen des aktuellen Parameterwerts mit mindestens einem in der Speichereinheit 40 gespeicherten, für ein Befolgen der Fahrempfehlungen durch den Benutzer typischen Referenzwert eine Wahrscheinlichkeit für die folgende Route des Fortbewegungsmittels zu errechnen.

To ensure the functionalities set out above, the location / processing unit is 10 designed to

• The parameter value, in particular the speed and the direction of travel, in at least one memory unit 40 , in particular in at least one database, to save and
• By comparing the current parameter value with at least one in the memory unit 40 stored, for a follow-up of the driving recommendations by the user typical reference value to calculate a probability for the following route of the means of transport.

If the plausibility check has a high probability of deviating from or leaving the given route 12 results in the illustrated embodiment, the output of the original driving recommendation of the route guidance unit 20 suppressed. Furthermore, from the location / processing unit 10 a new route can be specified.

By means of one or more, for example as C [ompact] D [isc] or as D [igital] V [ersatile] D [isc] trained disk 300 (see. 1 ) can be a conventional navigation system 200 be upgraded to operate according to the method of the present invention. This is on the disk 300 a corresponding computer program stored.

In 2 is a first example of the use of the navigation system 200 out 1 shown. At a decision point 50 is through the given route 12 a turn described. Follows the user of the given route 12 , the user will adjust the vehicle speed to the turn. With the aid of the navigation assistant implemented in the form of a dynamic vehicle model 100 , in particular the plausibility check, it is estimated at what speed the user will perform the turn maneuver.

• – hundert Meter vor dem Entscheidungspunkt 50, zum Beispiel auf einer Rampe, wird die Geschwindigkeit langsam reduziert;
• – dreißig Meter vor dem Entscheidungspunkt 50, im vorliegenden Falle dreißig Meter vor der Kreuzung, wird stärker abgebremst;
• – eventuell kommt das Kraftfahrzeug zum Stillstand;
• – eine Kurve von achtzig Grad fährt der Benutzer mit zwanzig Stundenkilometern (= 20 km/h);
• – im Ausgang der Kurve wird beschleunigt.

When leaving the main road, for example, the following behavior is typical:

• - one hundred meters before the decision point 50 For example, on a ramp, the speed is slowly reduced;
• - thirty meters before the decision point 50 , in the present case, thirty meters before the intersection, is braked stronger;
• - possibly the motor vehicle comes to a standstill;
• - A curve of eighty degrees, the user drives at twenty kilometers per hour (= 20 km / h);
• - At the exit of the curve is accelerated.

• – die Geschwindigkeit, beispielsweise neunzig Stundenkilometer, wird um nicht mehr als zehn Stundenkilometer verändert.

By contrast, the following behavior is typical when following the federal highway:

• - The speed, for example, ninety kilometers per hour, is not changed by more than ten kilometers per hour.

By using the vehicle speed as a parameter value in the plausibility check, at about constant speed, about eighty meters to ninety meters before the decision point 50 the likelihood of turning onto the turning path is greatly reduced. Thus, the location / processing unit provides 10 in this exemplary case, the turn-off path so timely no longer that the route guidance 20 can trigger the route recalculation before the "right turn" would be spoken.

To outside the location / processing unit 10 , especially outside the location, to deal only with highly probable paths, takes place within the location / processing unit 10 expediently a selection of the paths for location outside instead. In the location / processing unit 10 All paths, including the most unlikely, are maintained within a Contour of Equal Probability (CEP) lookup window.

For the evaluation of the speed can also, as in 3 represented, the road class are used. This creates another criterion for the evaluation of parallel roads of different road classes.

The through the sensor 30 the navigation assistant 100 Determined position history 16 is in 3 shown as an arrow. Using a conventional location would in this example be the inner city street 60 are selected as the higher-likely road, because the course coincides and the distance from the sensors 30 determined position is smaller than the distance to the highway 70 ,

When using the in 1 presented navigation assistance 100 the speed is used as a further criterion in determining the course of the position. From the over the sensors 30 determined speed and from that in the data of the database 40 The average speed saved determines the probability of each road in the viewing window.

In this example, at a vehicle speed of one hundred kilometers per hour, a position is on an inner-city road 60 (on which a speed of fifty kilometers per hour is prescribed) is very unlikely. In this case, tracking locates 10 internally but still both routes or paths on, so in the present case, the inner-city street 60 and the highway 70 However, the unlikely path will be from the location 10 the rest of the navigation system 200 not provided and thus not used as a route search start position.

• – der Fahrzeug-Positionsverlauf mit dem digitalen Straßenverlauf verglichen werden und/oder
• – die Fahrzeuggeschwindigkeit mit den Straßenklassen bzw. mit den in den Daten gespeicherten Durchschnittsgeschwindigkeiten bewertet werden.

As a criterion for the evaluation of the roads 60 . 70 as possible system position can be at the in 1 described navigation assistance 100

• - The vehicle position history are compared with the digital road and / or
• - the vehicle speed with the road classes or with the average speeds stored in the data are evaluated.

The condition is that the valued roads 60 . 70 lie in the viewing window; This describes the maximum tolerable distance between sensor position and digital road.

Above is exemplified that in the navigation system 200 the vehicle speed can be used as a criterion for checking the plausibility of the current position. Furthermore, it is described that the plausibility check is based on a comparison between the distance traveled by the means of transportation and the predetermined route 12 can support. The following is an example given that the given route 12 can be used as a criterion for checking the plausibility of the current position:
In conventional navigation assistance, the path that deals with the route 12 covers, very highly rated. The advantage is that with the existing location 10 while following the route 12 no location uncertainties can penetrate the user.

Disadvantage of the conventional method is that when deviating from the route 12 long at the last position on the given route 12 what is referred to as so-called "sticking" on the given route 12 referred to as.

At the navigation assistant 100 According to the present invention, the influence of the given route 12 be lowered to the rating of the locating paths. Since the new evaluation criteria (speed and / or direction of movement) prevent incorrect support, the route start position can be taken directly from the highest-valued positioning position.

Of the Advantage of the present invention is that without additional Hardware building blocks, the is called without additional Hardware costs the location of the navigation devices are significantly improved can. Thus, the location of navigation devices is also in critical positioning situations further specified.

Claims (10)

Navigation assistant ( 100 for a means of movement - for determining possible routes from a starting point to a destination on the basis of route network data, in particular on the basis of road network data, - for specifying a preferred route ( 12 ) and - for issuing driving recommendations that at least one user along the predetermined route ( 12 ), characterized in that the navigation assistance ( 100 ) is designed to perform at least a plausibility check as to whether the means of transportation of the predetermined route ( 12 ) will follow or not. Navigation system ( 200 ), characterized by at least one navigation assistant ( 100 ) according to claim 1. Method for navigating at least one means of locomotion, wherein - possible routes from a starting point to a destination are determined on the basis of route network data, in particular on the basis of road network data, - a preferred route ( 12 ) and - driving recommendations that at least one user along the predetermined route ( 12 ), are output, characterized in that at least one plausibility check is made as to whether the means of transportation of the predetermined route ( 12 ) will follow or not. A method according to claim 3, characterized in that the plausibility check on at least one following the driving recommendations or departing from or leaving the predetermined route ( 12 ) indexing parameter value. Method according to claim 4, characterized in that, in particular continuously and / or at the same time, the parameter value, - especially the speed, for example, at least one speed change of the means of locomotion and or - especially the direction of travel, for example at least one angle change the direction of locomotion, the means of transport is detected. Method according to claim 4 or 5, characterized in that - the parameter value, in particular the speed and / or the direction of travel, stored will and - by Compare the current parameter value, especially the current one Speed and / or the associated current direction of travel, with at least one stored, for following the driving recommendations by the user typical reference value a probability for a Following the driving recommendations is calculated. Method according to at least one of claims 3 to 6, characterized in that - the output of the original driving recommendation is suppressed and / or - a new route ( 14 ), if the plausibility check has a high probability of deviating from or leaving the predefined route ( 12 ). Computer program product comprising at least one Program part for execution a method according to at least one of the claims 3 to 7. Machine-readable, in particular computer-readable, data carriers ( 300 ), On which at least one computer program product according to claim 8 is recorded and / or stored, and - which is used for updating and / or updating at least one navigation assistant ( 100 ) according to the preamble of claim 1, in particular at least one at least one navigation assistant ( 100 ) according to the preamble of claim 1 having navigation system ( 200 ), is provided. Use of at least one navigation assistant ( 100 ) according to claim 1 and / or a method according to at least one of claims 3 to 7 and / or at least one computer program product according to claim 8 in at least one navigation system ( 200 ).