EP2176847A2 - Procédé de fonctionnement d'un système de navigation dans un véhicule et système de navigation - Google Patents

Procédé de fonctionnement d'un système de navigation dans un véhicule et système de navigation

Info

Publication number
EP2176847A2
EP2176847A2 EP08784263A EP08784263A EP2176847A2 EP 2176847 A2 EP2176847 A2 EP 2176847A2 EP 08784263 A EP08784263 A EP 08784263A EP 08784263 A EP08784263 A EP 08784263A EP 2176847 A2 EP2176847 A2 EP 2176847A2
Authority
EP
European Patent Office
Prior art keywords
weather
sensor
navigation system
current
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08784263A
Other languages
German (de)
English (en)
Inventor
René SCHLAGEHAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Garmin Wurzburg GmbH
Original Assignee
Navigon AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Navigon AG filed Critical Navigon AG
Publication of EP2176847A2 publication Critical patent/EP2176847A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
    • G01C21/34—Route searching; Route guidance
    • G01C21/3453—Special cost functions, i.e. other than distance or default speed limit of road segments
    • G01C21/3492—Special cost functions, i.e. other than distance or default speed limit of road segments employing speed data or traffic data, e.g. real-time or historical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
    • G01C21/34—Route searching; Route guidance
    • G01C21/36—Input/output arrangements for on-board computers
    • G01C21/3697—Output of additional, non-guidance related information, e.g. low fuel level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
    • G01W1/06—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed giving a combined indication of weather conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096791—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is another vehicle
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
    • G08G1/096827—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed onboard
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096833—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route
    • G08G1/096844—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route where the complete route is dynamically recomputed based on new data

Definitions

  • the invention relates to various variants of a new method for operating a navigation system in a vehicle. Furthermore, the invention relates to a navigation system suitable for carrying out the method.
  • Generic navigation systems serve to guide the driver of a vehicle by a suitable route guidance from a starting point to a destination point.
  • the navigation system has an input device, for example a keyboard or a touch screen, at which the user can enter operator commands, in particular location information for specifying the starting point and / or the destination point.
  • a route network database in which the road network of a particular geographical area is described in the form of machine readable data, a route calculation unit calculates the planned route from the starting point to the destination point.
  • speed limits characterized by special speed limit attributes.
  • the German Highway Code knows speed limits for motorways, which only apply in the event of rain or wet roads. These speed limits thus depend on the respective weather in the area of the corresponding road section.
  • the navigation systems include a signal receiving unit with which position signals can be received. These may in particular be satellite signals from GPS satellites or similar satellite systems. The further processing of position signals, as they are transmitted from the central control of a motor vehicle, such as speed and / or acceleration signals, conceivable. By means of a position determination unit, the navigation system then determines the current position of the vehicle from the position signals.
  • the navigation system also includes an output device for the optical or acoustic output of signals to the driver of the vehicle.
  • display units or loudspeaker units can serve as the output device.
  • the invention is generally based on the basic idea that at least one weather sensor or a weather sensor interface for connecting a weather sensor is provided on the navigation system. In this way, data for describing the current weather situation can be read into the navigation system in order to take into account these weather-describing data during subsequent functional processes of the navigation system.
  • the output device of the navigation device is used to output a weather warning.
  • a correspondingly suitable symbol for warning against rain, snow or fog can be displayed.
  • the data for describing the current weather conditions can also be used to influence the route calculated by the navigation system weather-specific.
  • the measurement data of a precipitation sensor and / or the measurement data of a fog sensor and / or an outside temperature sensor are evaluated for determining the current weather conditions.
  • the measurement data of a precipitation sensor can then warn the driver of precipitation, ie rain or snow.
  • the precipitation amounts and / or precipitation durations are taken into account, whereby the driver is also warned of aquaplaning danger depending on corresponding criteria.
  • attributes stored in the road network database for the individual road sections can be taken into account in the weather-dependent calculation of the planned route.
  • road sections on which the risk of aquaplaning is particularly large and which are therefore in nature therefore marked with corresponding road signs may be stored in the route network database with a corresponding attribute describing the risk of aquaplaning.
  • attributes for describing road sections with hazards are also known.
  • those road sections which have certain weather-related attributes, such as the attributes for describing the risk of aquaplaning and / or attributes describing the risk of mist can be filtered out if it has been determined by evaluation of the weather sensor's measurement data appropriate weather prevails in the busy area.
  • the filter criteria for the weather-dependent calculation of the planned route are configured user-dependent and / or vehicle-dependent.
  • the vehicle type can be taken into consideration in the judgment, provided that this is e.g. is known by a user profile of the navigation system. For example, for a SUV such road sections would be passable, for a caravan wagon, however, not.
  • a second variant of a method according to the invention is directed to navigation systems in which the road network database contains road sections whose weather-dependent speed restrictions are characterized by special speed limit attributes.
  • the weather conditions determined by evaluation of the weather data of the weather sensor are compared with the weather conditions of the current road section described in the weather-dependent speed limit attribute.
  • a weather-dependent speed limit signal can then be output at the output device of the navigation system.
  • this weather-dependent speed limit can be displayed as a function of the weather by the method according to the invention. This makes it possible, for example, for the normal speed limit to be displayed on dry roads and the rain-specific speed limit for rainy days.
  • a speed warning message can then be output. For example, if the speed limit on a road section is limited to 100 km / h on a wet road surface and the navigation system has determined that it is raining by evaluating the weather sensor signals, the driver may exceed the speed limit, for example when driving on the road section at 130 km / h. h, be notified of this exceeding the weather-dependent speed limit. For this purpose, for example, an acoustic speed indication with the words "attention" or "attention speed restriction” can be announced on a loudspeaker. In order to avoid that a speed warning message is output even if the weather-dependent speed limit is very small, a tolerance threshold can additionally be taken into account.
  • This may be an absolute value, for example a tolerance of 10 km / h, or a relative value, for example 10% of the maximum speed of the speed limit. If the tolerance threshold is taken into account, the speed warning is output only if the sum of the current speed and the toe threshold is greater than and / or equal to the maximum speed according to the speed limit.
  • the current speed of the vehicle is determined, is basically arbitrary.
  • the speed of the vehicle is evaluated from the time change of the current position of the vehicle as determined in the position determination unit.
  • the measurement sensor provided in the vehicle can also be used.
  • a sensor interface must be provided on the navigation system, via which the corresponding measurement data of the speed sensor in the vehicle can be read into the navigation system.
  • the navigation system according to the invention is characterized in that a weather sensor or a weather sensor interface is provided for connecting a weather sensor.
  • the weather sensor can be designed in the manner of a precipitation sensor and / or in the manner of an outside temperature sensor and / or in the manner of a fog sensor.
  • the weather sensor interface is suitable for wireless data transmission. This is particularly advantageous in mobile navigation devices that are used as retrofit devices in vehicles.
  • the measurement data of the weather sensor can be reliably transmitted to the navigation device via the wireless weather sensor interface, which may be designed, for example, in the manner of an infrared interface or in the manner of a Bluetooth data transmission interface.
  • the structural design of the weather sensor in turn is basically arbitrary.
  • mobile navigation devices In cooperation with mobile navigation devices is in particular the use of mobile sensor units as
  • Weather sensors advantageous because these mobile sensor units can be made available as accessories.
  • the mobile sensor unit is then attached to a suitably suitable location of the vehicle, for example under the windshield, and the measurement data of the mobile sensor units are transmitted via the weather sensor interface to the navigation system, in particular to a mobile navigation device.
  • the weather sensor interface of the navigation system must be suitable to a To allow data transmission from the data flow of the vehicle. In this way, the measurement data of the vehicle-mounted weather sensors can be read into the navigation system.
  • the weather sensor is arranged in the holder for mounting a mobile navigation device.
  • the additional accessory which is the weather sensor, integrated into an already existing accessory of the navigation device and can be easily protected in this way from damage.
  • a detachable coupling element in particular a suction foot
  • the integration of a precipitation sensor can thus be realized in a particularly simple manner.
  • precipitation sensors which must be placed below the windshield.
  • the precipitate can be detected on the vehicle when the weather sensor is designed in the manner of a reflection sensor.
  • the reflection sensor With the reflection sensor, the light reflections are evaluated on the windshield, since these light reflections change depending on the amount of precipitation. This gives a significant measurement signal for determining the current precipitation.
  • the activity of the windshield wiper of the vehicle is evaluated for the realization of the weather sensor.
  • This data can be easily read from the vehicle control, without that additional installations in the vehicle are necessary. Since the wipers of the vehicle are regularly switched on during rainfall, this is a reliable measuring signal for characterizing the precipitation.
  • a filtering element should additionally be provided in order to filter out the activity of the windshield wiper function of the windscreen washer. Because when wiping the windscreen wipers are activated without there is an external precipitation, so that without filtering out this feature an undesirable
  • Noise signal is caused during windscreen cleaning with regard to the weather-dependent use of the navigation system.
  • the threshold value being higher, ie representing a higher speed than the threshold value, whereby the aforementioned tolerance value can be taken into account.
  • the status "permitted speed is exceeded” is changed to the status "permitted speed is not exceeded”.
  • the difference between the two thresholds is preferably configurable. This procedure ensures that warnings are issued repeatedly by a driving speed that is just around the upper threshold. Only with a change in the permitted speed In this case, a new warning should not be possible until the lower threshold has been reached.
  • FIG. 1 shows a display device of a mobile navigation device with display of weather-dependent speed restrictions.
  • FIG. 2 shows the functional architecture of a navigation system according to the invention when using weather sensors installed in the vehicle
  • FIG 3 shows the functional architecture of a navigation system according to the invention when using a mobile sensor unit as a weather sensor.
  • FIG. 1 shows the display of a display device 1 during operation of a mobile navigation device.
  • distance-dependent speed warnings 2 and 3 can be displayed.
  • the general speed limit 3 limits the maximum speed to 100 km / h.
  • a weather-dependent speed-limiting attribute is stored in the road network database for the road section. Afterwards applies on the appropriate street section with rain a maximum speed of 80 km / h.
  • the speed limit 3 is displayed.
  • the speed limit 2 is displayed.
  • the speed limit 2 is accompanied by a rain cloud symbol to indicate to the driver that it is a weather-dependent speed limit that applies only to rain.
  • FIG. 2 shows the functional architecture of a mobile navigation system 4 equipped with a navigation unit 5 for calculating routes based on the data from a map database 8. Furthermore, the navigation system 4, a GPS module 6 for determining the position of the device by satellite navigation. Other embodiments using other positioning methods or additional sensors such as inertial sensors may also be considered here. From the determined geographical position, a positioning by map matching is performed while accessing the map database 8. In a map database 8, digital road maps are stored, with road sections having weather-dependent speed restrictions being characterized by corresponding speed limitation attributes. With a warning unit 7 warnings are generated from all available data and output to an output unit 9 for the user.
  • the output unit 9 can consist of an optical output unit, for example a screen, and an acoustic output unit, for example a loudspeaker.
  • the optical representation may correspond to that shown in FIG. 1.
  • a different color scheme can visually point out the imminent danger.
  • the playing of a warning tone or a language-dependent warning text is advantageous. If a weather-dependent speed limit is exceeded, for example, the text can be output: "Attention: in wet conditions, only 80 km / h are permitted.”
  • the data of the in-vehicle speed measuring sensor 15 is used. The measurement data of the sensors 12 to 15 are forwarded via a vehicle bus 1 1 and a sensor interface 16 to the navigation system 4 and read there appropriately.
  • the temperature sensor 12 serves to measure the outside temperature.
  • the rain sensor 13 which serves in its original function for the automatic control of a windshield wiper, measures the precipitation on the vehicle window.
  • the windshield wiper sensor 14 With the windshield wiper sensor 14, the activity of the windshield wipers, in particular the Heckusionnwischer- can be determined. As a result, wet roads can be detected, even if there is no more precipitation, since in particular the rear window wipers remain activated regularly, as long as the road still swirled up moisture.
  • the speed of the vehicle can be measured.
  • Such a speedometer 15 is regularly available on all vehicles.
  • FIG. 3 schematically illustrates the functional architecture of the interaction of the mobile navigation system 4 with a mobile sensor unit 19, which serves as a rain sensor.
  • the mobile sensor unit 19 is fastened to the inside of a windshield 18.
  • an interface 17 which may be designed in particular wirelessly, the measurement data of the rain sensor 19 are read into the mobile navigation system 4 and evaluated there in turn with regard to the output of weather-dependent speed warnings.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Atmospheric Sciences (AREA)
  • Environmental Sciences (AREA)
  • Ecology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Navigation (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'un système de navigation (4) dans un véhicule, ce système comprenant : une unité de saisie permettant de saisir des ordres d'utilisateur et/ou des indications de localisation, en particulier des points de départ et/ou des points d'arrivée, une base de données (8) du réseau routier, une unité (5) de calcul d'itinéraire qui calcule un itinéraire planifié en tenant compte des indications de localisation et de la base de données (8) du réseau routier, l'itinéraire allant du point de départ au point d'arrivée, une unité (6) de réception de signaux qui reçoit des signaux de position, en particulier des signaux GPS, une unité (5) de détermination de position qui détermine la position actuelle à partir des signaux de position, au moins un dispositif (9) de sortie optique et/ou acoustique, au moins un capteur météorologique ou une interface (16, 17) de capteur météorologique qui reçoit les données d'au moins un capteur météorologique (12, 13, 14, 19). Le procédé présente les étapes suivantes : a) détermination des conditions météorologiques en cours par évaluation des données de mesure du capteur météorologique (12, 13, 14, 19); b) émission d'un avertissement météorologique qui tient compte des conditions météorologiques en cours et/ou calcul de l'itinéraire planifié en tenant compte des conditions météorologiques en cours.
EP08784263A 2007-08-10 2008-06-30 Procédé de fonctionnement d'un système de navigation dans un véhicule et système de navigation Withdrawn EP2176847A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710037993 DE102007037993A1 (de) 2007-08-10 2007-08-10 Verfahren zum Betrieb eines Navigationssystems in einem Fahrzeug und Navigationssystem
PCT/DE2008/001062 WO2009021477A2 (fr) 2007-08-10 2008-06-30 Procédé de fonctionnement d'un système de navigation dans un véhicule et système de navigation

Publications (1)

Publication Number Publication Date
EP2176847A2 true EP2176847A2 (fr) 2010-04-21

Family

ID=40279369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08784263A Withdrawn EP2176847A2 (fr) 2007-08-10 2008-06-30 Procédé de fonctionnement d'un système de navigation dans un véhicule et système de navigation

Country Status (3)

Country Link
EP (1) EP2176847A2 (fr)
DE (1) DE102007037993A1 (fr)
WO (1) WO2009021477A2 (fr)

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SI23329A (sl) * 2011-06-02 2011-09-30 Ivan Cerovšek Postopek za elektronski nadzor hitrosti vožnje v cestnem prometu in naprava po tem postopku
DE102012020568A1 (de) * 2012-10-19 2014-04-24 Audi Ag Verfahren zum Betreiben einer Navigationseinrichtung und zur Erfassung einer wahrnehmbaren Umwelt
DE102012111625A1 (de) * 2012-11-30 2014-06-05 Conti Temic Microelectronic Gmbh Verfahren zum Auslesen von Sensorrohdaten eines Umfeldsensors eines Fahrzeugs
DE102014107358A1 (de) 2014-05-26 2015-11-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung und Verfahren zum Erfassen von Nässe auf einer Fahrbahn
EP3318846B1 (fr) * 2016-11-04 2019-06-19 Skoda Auto a.s. Procédé d'affichage d'un affichage de navigation, système de navigation et véhicule automobile
US11340077B2 (en) 2019-03-28 2022-05-24 Here Global B.V. Driving condition specific sensor quality index

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DE10101651A1 (de) * 2001-01-16 2002-07-18 Daimler Chrysler Ag Verfahren zur verkehrs- und/oder witterungsabhängigen Fahrzeugsteuerung
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Also Published As

Publication number Publication date
WO2009021477A2 (fr) 2009-02-19
WO2009021477A3 (fr) 2009-12-17
DE102007037993A1 (de) 2009-02-19

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