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
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
  • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
  • G06Q50/40—Business processes related to the transportation industry
• • 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
  • G08G1/096838—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route where the user preferences are taken into account or the user selects one route out of a plurality
• • 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
• • 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
  • G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver

Definitions

• the present invention relates to a method for operating a navigation system, in which position data are determined, on the basis of the position data and map data, a route to a destination is calculated and route guidance instructions corresponding to the route are created and output. Furthermore, the present invention relates
• Invention a navigation system for carrying out the method.
• Navigation systems for vehicles and methods for operating such navigation systems are well known.
• the current position of the vehicle is determined and then a route to a given or entered destination is calculated.
• digitized map data of a road network in a memory for example a CD-ROM or a DVD, are accessed.
• the map data may include, among other things, information about lanes, road class, intersections, turn conditions, and points of interests. The amount and accuracy of the information is dependent on the capacity of the memory used.
• the geographic position of the vehicle is now often determined by a satellite-based system, such as the Global Positioning System GPS or other comparable system.
• a satellite-based system such as the Global Positioning System GPS or other comparable system.
• location information for example, the direction of travel via a gyrometer, the driving speed via speed sensors and / or driving changes via acceleration sensors can be determined.
• a preferably electronic data processing device for example a microprocessor, determines the location of the vehicle on the basis of the determined position data and the map data of the digitized road map.
• mapping in which the information of various sensors is compared with the information of the stored map
• the position of the sensor is determined by the sensor values and the content of a digital map with the highest possible resolution (fine geometry or shape points) is therefore necessary
• the system guides the route with the indication that the user is outside a trafficable road.
• EP 1 380 021 B1 discloses a method for operating such an off-board navigation system, in which a current distance of the vehicle from a first decision point of a route to be traveled by the vehicle is permanently checked and when a minimum distance of the vehicle is exceeded Passing the decision point a next decision point is determined.
• the invention thus provides that a deviation factor is determined for the position data and the
• Guidance notes are additionally created depending on the deviation factor.
• the essential idea here is that the determined position data remain unchanged even if determined uncertainties for the position. If such uncertainties occur, the route guidance is adapted to this uncertainty with regard to the knowledge of the exact location.
• the driving instructions are created in a modified form and communicated to the user.
• the deviation factor is determined as a function of the position data of a satellite-supported position determination, of measurement data of at least one sensor, of the map data of the calculated route and / or on the basis of a stored driver profile.
• the method is based on the sensors that are available to it, present and installed in the vehicle, or on a part of these sensors.
• the information about the calculated route and a driver profile can also be evaluated, from which a corresponding road course can be derived on the basis of a specific driving behavior. The derived road can be compared with the map data.
• the route guidance information is output visually and / or acoustically.
• a plurality of routing instructions are linked to one another in such a way that the route guidance information with respect to the next decision point on the route is created as a function of the position data and of the deviation factor and the routing instructions are created with respect to subsequent decision points depending on the respective previous decision point.
• the routing instructions are output at certain intervals before the next decision point and the
• the map section when displaying a map section on a display when a certain value of the deviation factor is reached, the map section is enlarged.
• the map section is displayed in a two-dimensional north plan view. Changing the scale of the map, and in particular changing a map view in a north-facing map, compensates for the inaccuracy of the location position, as erroneous position indication becomes less obvious. This can be further assisted by the representation of the location by means of a Carsors of an arrow changes into a circle and thus the orientation of the vehicle is not reproduced.
• Warning message issued This makes it clear to the user that no precise position determination is currently possible. This can further lead to the fact that in a too large site uncertainty no driving recommendation can be issued.
• a plausibility check is carried out on the basis of the map data and the navigation guidance information is additionally produced as a function of the plausibility check. If position inaccuracy can be explained on the basis of the map data, for example by shading the vehicle for the satellite signals when driving through a tunnel, this can be taken into account as a function of the situation.
• a display and / or a loudspeaker are provided as the output device.
• a visual and acoustic reproduction of the driving recommendations is possible.
• a satellite-based location system For accurate location determination is provided as a position determination device, a satellite-based location system. This can be, for example, the Global Positioning System GPS or the Galileo system. In addition to the normal signal information, the Doppler effect in the satellite signals can additionally be exploited.
• At least one further sensor is provided as a further position-determining device.
• Navigation system can thus access the optionally installed in the vehicle sensors and their sensor data.
• a stored driver profile is provided in order to derive from the determined sensor values and the driver profile a road course which can be compared with the map data.
• FIG. 1 shows in a schematic sketch an inventive navigation system 1 with a central data processing device 2, for example an electronic microprocessor.
• the data processing device 2 is connected to a position-determining device 3, which receives radio signals by means of an antenna 4 mounted outside the navigation system 1, which are indicated by the arrow
• the radio signals 5 are indicated in the figure 1.
• the radio signals 5 are signals of a satellite-based location system, for example the Global Positioning System GPS, the Galileo system or a comparable system.
• the position determination device 3 transmits the determined position data to the data processing device 2.
• the user of the navigation system 1 can determine and input a destination in methods known per se.
• the data processing device 2 calculates, based on the position data obtained from the position determining device 3, that of the
• Input device 6 transmitted target data and on the basis of map data stored in a memory 7, a route from the current position to the destination.
• the data processing device 2 receives in addition to the position data of the position determining device 3 further evaluable for determining position data of several connected to the navigation system 1 sensors 9, 10, 11.
• This can, for example, a Wegumblensensor, a speed sensor 9, acceleration sensors 10 for accelerations in different directions and space or Yaw rate sensor 11 be.
• AIs further sensor, for example, a geomagnetic sensor or compass can be provided.
• determinations of a wheel pulse difference for rotation rate determination, the steering angle and / or the pressure for height measurements are conceivable.
• the data processing device 2 does not have to be available to all available
• the data of the calculated route and a stored driver problem are available as sensors, since they can also be used to determine the position.
• the driver profile or the driver profiles are stored in the memory 7 and can be used by the
• Data processing device 2 are read out there.
• the data processing device 2 In accordance with the calculated route and the position data with a determined deviation factor, the data processing device 2 generates guidance instructions which are transmitted via an output device 8 to the user of the
• the output device 8 may have a display or a display (not shown) for optical reproduction and / or a loudspeaker (not shown) for the acoustic reproduction of the guidance instructions.
• the erf ⁇ ndungshiele method is characterized by the fact that is moved away from a steady demand of an exact knowledge of the current position. Even in situations with a reduced detection quality, the user is provided with driving recommendations or route guidance information that is comprehensible and plausible to the user. Based on the sensor data of all
• Position determining means is checked whether the detected with the sensor data location coincides with a point on the calculated route.
• a deviation factor is determined which corresponds to an indication of estimated position uncertainty.
• the deviation factor is not a specified number, but includes information for the uncertainty of the position (as length and width), but also, for example, the speed, the vehicle direction of the height, etc.
• the thus determined deviation factor is therefore a relatively complex entity.
• the measured sensor data can be compared with learned and stored driver profiles in which a certain driving behavior for corresponding road situations are stored. These can be specific speed values and corresponding variances for a defined one
• the current position can be determined with sufficient accuracy.
• this exact location requires a permanent contact with the radio signals emitting satellite.
• the reception of the radio signals can be disturbed by the current environment of the vehicle, for example, when driving through high-rise gorges, mountain valleys, and / or a tunnel.
• Criteria for the position uncertainty may be, for example, a deviation of more than 500 m or a directional error of more than 60 °. Also, too many contradictory positions within the digitized road network can be used as a criterion. In the preparation of the driving recommendations, the determined deviation factor is taken into account, so that when a certain criticality
• the display of the route guidance information can additionally be adapted to the situation. For example, in the display only an arrow is shown with the
• the zoom level must be lowered in this case.
• the scale of the map shown is thus increased and the map shown represents a larger area of the road network.
• the navigation system constantly checks the accuracy of the position determination and adapts the guidance instructions to the uncertainty of the current position.
• the user thus receives no driving recommendations, which he obviously recognizes as not accurate or incorrect.
• an increase in the deviation factor first makes it possible to check whether the increasing uncertainty in the position determination on the basis of the stored map data appears plausible.
• a disturbance of the reception of the satellite signals is to be expected, for example, when driving through a tunnel or underpassing a bridge. If the information loss is plausibility, the duration of the expected shadowing can be estimated and it must be decided on the basis of the recommended driving on the route, whether driving recommendations must be given within the Abschattungszone.
• the shading distance is estimated by the information of the map data and reasonable surcharges.
• the route guidance notice can be adjusted accordingly, for example, "turn left in the tunnel” and / or "turn right after the tunnel”.
• the current position uncertainty or the deviation factor is output to the user on the display. This makes it clear to the user at all times which accuracy is based on the issued driving recommendations.

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• Engineering & Computer Science (AREA)
• Radar, Positioning & Navigation (AREA)
• Physics & Mathematics (AREA)
• Remote Sensing (AREA)
• General Physics & Mathematics (AREA)
• Mathematical Physics (AREA)
• Automation & Control Theory (AREA)
• Business, Economics & Management (AREA)
• General Health & Medical Sciences (AREA)
• Economics (AREA)
• Health & Medical Sciences (AREA)
• Human Resources & Organizations (AREA)
• Marketing (AREA)
• Primary Health Care (AREA)
• Strategic Management (AREA)
• Tourism & Hospitality (AREA)
• General Business, Economics & Management (AREA)
• Theoretical Computer Science (AREA)
• Navigation (AREA)
• Traffic Control Systems (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2005
  • 2005-08-19 DE DE102005039283A patent/DE102005039283A1/de not_active Ceased
• 2006
  • 2006-07-21 WO PCT/EP2006/064537 patent/WO2007020155A1/de active Application Filing
  • 2006-07-21 CN CN200680029984XA patent/CN101243301B/zh not_active Expired - Fee Related
  • 2006-07-21 US US11/990,727 patent/US20100299059A1/en not_active Abandoned
  • 2006-07-21 EP EP06777905A patent/EP1920217A1/de not_active Ceased
  • 2006-07-21 KR KR1020087003975A patent/KR20080036099A/ko not_active Application Discontinuation

Patent Citations (1)

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